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Permit L94-0104 - CITY OF TUKWILA - TUKWILA COMMUNITY CENTER SEPA ENVIRONMENTAL IMPACT STATEMENT
CITY OF TUKWILA MITIGATED 'F' = ►.NSIGNIFIq CE (MDNS) DESCRIPTION OF PROPO MODIFIED 4/18/95 Construction of a community recreation and meeting center for the City of Tukwila including 48,000 s.f. of building area, a 327 -space parking lot, an outdoor park, and 480 +/- linear feet of in -river storage and bank stabilization. PROPONENT: CITY OF TUKWILA LOCATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: ADDRESS: PARCEL NO: 017900 -3225 SEC /TWN /RNG: 10 -23 -4 LEAD AGENCY: CITY OF TUKWIL'A FILE •94 =61,04 The City,has determined that the proposal does not have a :probab`lk significant adverse impact.-.on the,environment. An environment impact statement (EIS) is not required under R.CW 43.21c.030(2)(c). This. decision was made after review of a completed .environmentalchecktist and other information on file with the lead agency. This' information is available to the public on request.. The conditions to this SEPA Determination are attached. This DNS is zed under 197-11-340(2). Comments must be submitted by The lead agency will not act on this proposal for 15 days from the date below. StVLancaster, Responsible Official City of Tukwila, (206) 431 -3680 6300 Southcenter Boulevard Tukwila, WA 98188 You may appeal this determination .to':the City Clerk at City Hall, 6200 Southcenter Boulevard, Tukwila, WA 98188 no later than 10 days from the above signature date by written . appeal . stating :. the basis of the appeal for specific factual objections: You may be requlred to bear some of the expenses for an appeal. Copies of the procedures for SEPA appeals are available with the City Clerk and Department of Community Development. City of Tukwila John W. Rants, Mayor Department of Community Development Steve Lancaster, Director TUKWILA COMMUNITY CENTER #L94 -0104 MODIFIED MITIGATED DETERMINATION OF NON- SIGNIFICANCE Conditions of approval 4/18/95 The Mitigated Determination of Non - Significance for the above project, dated 2/8/95, has been modified to reflect public and agency comments. Additional conditions of approval are noted below, in Items 4 through 12. 1. To restore the shoreline environment and long -term health of salmonid habitat, a minimum of 6 large stature shade trees shall be added to the shoreline, spaced along the length of the project shoreline. 2. Prior to completion of construction, the project shall contribute its proportionate share of the costs for the following street improvements: curb, gutter, sidewalk, and undergrounding of utilities along 42nd Avenue South and South 124th. 3. To meet the requirements of the Green River Flood Control Zone District, the City shall: a. Obtain approval of the riverbank plan from the District prior to beginning construction. b. Provide the District with a riverbank /levee maintenance access easement in a form acceptable to the District within one year after construction completion. Additional conditions of approval as of 4/18/95: 4. There shall be no "fire truck turn - around" along river as noted on plans (shaded area sheet L -1); all existing vegetation in southwest corner of site along river shall be retained 5. All landscaped areas except lower riverbank stabilization area shall have automatic irrigation. 6. The archaeological site shall be adequately protected during construction with a sturdy construction barrier around its perimeter. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431 -3670 • Fax (206) 431-3665 Tukwila Community Center Modified MDNS 4/18/95, Page 2 7. To protect the archaeological site, the project shall retain an archaeologist to: a) make periodic inspections during construction to assure that the site remains protected; b) develop a monitoring, discovery and treatment plan in the event that archaeological materials are discovered elsewhere on the site during construction. 8. Riverbank stabilization: Rose and western crabapple plantings shall be bare root (versus cuttings). 9. Riverbank stabilization: Salix hookeriana shall be replaced with a more saline - tolerant species, such as Pacific willow or Sitka willow. 10. Upper riverbank planting: Willows shall be replaced with native shrubs more typical of upland conditions, such as native hazelnut and oceanspray. 11. Erosion control seed mix (or other groundcover) shall be applied to the upper riverbank area. 12. Bioswale plantings: Hardstem bulrush shall be replaced with a species more suited to intermittent and shallow inundation, such as Juncus, spp. or bentgrass (Agrostis stolonifera or alba). CITY OF TUKWILA MITIGATED TERMINATION OF NONSIGNIFI 4CE (MDNS) DESCRIPTION OF PROPOSAL: Construction of a community recreation and meeting center for the City of Tukwila including 48,000 s.f. of building area, a 327 -space parking lot, an outdoor park, and 480 +/- linear feet of in -river storage and bank stabilization. PROPONENT: CITY OF TUKWILA LOCATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: ADDRESS: PARCEL NO: 017900 -3225 SEC /TWN /RNG: 10 -23 -4 LEAD AGENCY: CITY OF TUKWILA FILE NO L94 -0104 The City; has determined that the proposal does not have a probable significant adverse impact on the environment. An environmental ``..impact statement: (EIS) is not required under RCW43.21c.030(2)(c). This made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. The conditions to this SEPA Determination are attached. This DNS "s i_jued under 197 -11- 340(2). .Comm'ents must be submitted by c', pR8 S The lead agency wi l 1 ,not act On ..this propos l fo 15 days from the date below.' Steve Lancaster, Responsible Official City of Tukwila, (206) 431 -3680 6300 Southcenter Boulevard Tukwila, WA 98188 Date You may appeal this determination to the. City Clerk; at City Hall, 6200 Southcenter Boulevard, Tukwila, WA 98188 no later than 10 days from the above signature date by written appeal stating the basis of the appeal for specific factual objections. You - may be required to bear some of the expenses for an appeal. Copies of the procedures for SEPA appeals are available with the City Clerk and Department of Community Development. City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director TUKWILA COMMUNITY CENTER #L94 -0104 MITIGATED DETERMINATION OF NON - SIGNIFICANCE Conditions of approval 2/8/95 1. To restore the shoreline environment and long -term health of salmonid habitat, a minimum of 6 large stature shade trees shall be added to the shoreline, spaced along the length of the project shoreline. 2. Prior to completion of construction, the project shall contribute its proportionate share of the costs for the following street improvements: curb, gutter, sidewalk, and undergrounding of utilities along 42nd Avenue South and South 124th. 3. To meet the requirements of the Green River Flood Control Zone District, the City shall: a. Obtain approval of the riverbank plan from the District prior to beginning construction. b. Provide the District with a riverbank /levee maintenance access easement in .a form acceptable to the District within one year after construction completion. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 4313670 • Fax (206) 431-3665 3,547A- -- REV (SEA --- Tukwila Community Center Project Na :rative The City of Tukwila proposes to construct a multi - purpose recreational facility on a 12.8 acre site along the banks of the Duwamish River. The site is located on 124th Ave. S. and S. 42nd St. in the Allentown neighborhood of Tukwila. The proposed Tukwila Community Center building is planned as a 48,000 square foot facility housing a full size gymnasium, 2 racquetball courts, a fitness and weight training room, locker rooms, administration and recreation offices, youth and teen center, arts and crafts space, child care area, general meeting space, multi- purpose banquet space and a senior adult activity center. Site improvements planned to accompany the new Community Center will include a 327 car parking lot. When completed the parking lot and building will cover about 30% of the site in impervious surface. Storm water from the building will be discharged directly to the river. Storm water runoff from the parking lot will be gathered in biofiltration swales, ran through an oil water separator and discharged to the river. Approximately 110,000 cubic feet of flood storage capacity will be added to the Duwamish river. An additional 20,000 cubic feet of storm water detention will be supplied on site. A control manhole will only release water from the parking area into the river when river volume is below flood stage. The river through this reach is subject to tidal influences. 480 lineal feet of the total 950 lineal feet of Duwamish River bank which fronts on the subject site will be stabilized. Existing steep banks will be regraded to a 2 to 1 slope and a 15 foot wide access bench will be placed just above ordinary high water to accommodate future river bank maintenance needs. The stabilized bank will be armored with rock rip -rap, and woody debris in the form of logs with root balls attached. The line of the river bank will undulate to create pockets of quiet water, improving the aquatic habitat. The completed hank will be fully revegetated using native riparian species. Site landscaping will include perimeter trees and shrubs to screen the parking area and athletic fields, with lawns and planting beds around the building. Parking lot interior landscaping will include sedges and reeds so that planting areas can also serve as biofiltration swales. RECEIVED FEB ® 1 1995 COMMUNI i'Y DEVELOPMENT Construction of the improvements mentioned above is planned to begin in summer of 1995 with completion planned in summer of 1996. The proposed park and athletic field improvements are scheduled for a second phase of construction in Spring of 1997. The athletic fields, picnic shelter, children's play area, outdoor basketball court and tennis court are planned to be constructed in this phase. When completed the site will be fully landscaped and a complete irrigation sprinkler system will be included. A portion of the subject site his been identified as being of archaeological significance. This area is identified on the site plan. The entire site has had a subsurface survey done to determine the limits of the archaeologically significant area. This area does qualify for placement on the Federal Register of Historic Places. Site improvements have been planned to avoid any sub - surface disturbance of this area, preserving the site for future investigation. The following agencies and individuals have either been working with the City of Tukwila to develop the proposed improvements, or have been given the opportunity to review the City's plans: Phil Fraser Ann Siegenthaler Gary Schulz Don Williams Phil Schneider Andy Levesque Rod Malcom Walter Pacheco City of Tukwila, Public Works City of Tukwila, Dept. of Community Dev. City of Tukwila, Dept. of Community Dev. City of Tukwila, Dept. of Parks and,Rec. Wash. State Dept. of Fisheries & Wildlife King Co. Surface Water Management Muckleshoot Indian Fisheries Muckleshoot Indian Cultural Affairs • 1[2 D°111JN F ]1WDAll]Th ME? ARCIEMECTURAIL ll]EVll'V D EVF:: DRAWING LIST CIVIL MASTER SITE PLAN SHORELINE GRADING AND PA{ZKING LAYOUT LANDSCAPE ' ARCHITECTURAL SITE PLAN PLANTING SCHEDULE SENIOR AND SOCIAL WING PLAN PLANTING PLAN LANDSCAPE DETAILS FITNESS WING PLAN ENLARGED RIVERBANK PLAN WEST LANDSCAPE DETAILS ELEVATIONS ELEVATIONS ENLARGED RIVERBANK PLAN EAST SECTIONS GUArli.it.:04: 1 1 DEVELOPMENT —MI/JUNI UM_ _arose _Amaunt, Doe ecttri-- NZ! t pARKINQ DATA RECEIVED JAN 31.1995 COMMUNITY DEVELOPMENT 124th STREET DUWAMISH RIVER SCALE IN FEET DESIGN HAI m INC. (WO ES2-3011 '=="= ------' WA IMAM Man . I. SCALE IN FEET STORM DRAIN TOE OF SLOPE GRAdING OM 1E1 EFEICAR TREE PLANTING DETAIL O DlC000UB TA!! PLANTING DETAIL NOTE: QUICK COUPLER Not TO SCALE ORO a •OYIO•OYM IMO IMn NPRaT IPOPAR) \Mr01 MAD RISER ASSEMBLY (LAWN AD RIIIN ASIIMSLY (POP -UP) NOT TO SGIi \ HOUGH BECK & BAIRD INC. LANDSCAPE AR0ITCCRIPX PLNN/N° - URBAN DESIGN NOR 65504 44.1 64. +OM ASSC0P4T. 92L AS 1R01rC0 O1rACTA11r00 NOT= MAO OMR 60.002.T NOT TO SCALE AREAS WOWS PCI 0/ 1001114 110 ROTA 10 0104 COMER RSR ASSOEIT DCTA1. 5. 10 0C11.11 3/4' 4013 001101 00004 nil 604104101 .. 10 PVC or 103(3 AS 01. 10 DEM/100604 6[000(6 Co OLDO 60 IRT. OP MAPLE PSC NIPPLE C SEPIN OM TO WADE (7001040 OPTION COMM PM OAM4 soot ASSCYRY AID MAN wrens)1(165. PRESSURE REDUCING VALVE & OBACKFLOW PREVENTER ASSEMBLY 60T TO SCNL 1 Cr. 2/r inoS SOUP II (4045 Y 940.16/41401104X00.71 AREAS KA1141700.11C LOCKING 10 1,114511 MAK 11 II=1 =E-111111 n=11= 1=11=11-11=11=11=t1-11=11=11. 1=n=I1=11=11=11 NC KOLE (YDa) I P1C Ta (SOA) lirQ e Lola me MPPIE (Yw) (4611 'PPLE 9408 10 NC 50017 OL XNID 60 PRC TEL 01 01 SOLD 10 PVC MPM111 µ4100y DUH VLLK 41861 440 N 6066 2 Cr. ]/C 110101 0101 SOW IMUS dAVI1 OL DroNNO SOP MANUAL DRAIN OVALVE ASSEMBLY NC LATINA O0 86140641 501m10 AS It NC 044640 SC140 60 roc 612 440110 SCALL ,---06110 DOC( MOTU roc (416TH 645210(15 SN411 Of SULSSD. MAIN AND/OR LATERAL PIPE OTRENCH DETAIL NOT /D SOLE 0) 0(181[ 5006 10 NC OL HOUGH BECK & BAIRD INC. UIDSC*PE 3A01TKTU1E P46240612 • 040214 11[5101 IDAPTA SOUL 1IITOI 10121 SM V. (70) I$2-7061 ME 6r MEM MESA UM MEMarm famattialk DUMPS R/ CYCLING BUILDING FLOOR AREA, GROUND FLOOR. 45,560 5F. MECHANICAL MEZZANINE. 2100 F. EVILCiNG TOTAL 46,2E20 SF. sminout AND SOCIAL WIING • Ir BANQUET MEETING AEROBICS 3. • A.” MT. Nit1/-10111111bJBIL- --IMIXL114---. --J1111113312.11/1--- P_,LLS1;, FLOOR PLN4 - -- • • taNsertx.n-Puovsetsairms AREA se AZA! TrARAce sinrtAu. .... intommennunsmunim KITCHEN ?IV,. --W-i ..Y.-A:k lel:Mall Eq.-----.1---4- el...W.. .1 ..,..... RESTROOM FITNESS ENTRY BANcummern46/Aszosics 14.1-TI-FIRPOSE H TERRACE SITTING PULL !11ij711 1/! ///// I1 i, 111 11111'111 n 1 ii-firffiNff i (11 i Wil "9.111 I SHisili COATS ram GRILLER AeovE 1111 IMAM EMIL 1 11'1 LOCKER FICX7H6 FITNESS MINS EINEEMEIMM 61),‘ASILIM TM PROM STORA6E EXPOSIT EttrotAtce FINE% Ewnwce RAccumALL COURTS FITNESS 112,45 PIM CHILLER ABOVE 11111011 1111111 r 111 _III(�lll�lllllr IIIIIIIIIIr mnrttarti.aartin111!IIIIIIII!!: ," Ind l , ,„ ME ' 1- ._ _ - _ � I - - • - OFFICES STAFF LOUNGE BOILER ADMINISTRATION VIEW IFROAli IIAIIVIRII! &YMNASIUM 111 11IIII ,Iw 111 '• Iw IA�111111rliii 1 11 �IIIII II' w ��� 111:�I�,I: mum 'SAFES DANCE POTTERY/CERAMICS MU.n-AJRPrO-E Yet45 VIEW MON PAD%III;fi j ARTS AND GRAFT5 PRE-SCHOOL/CHILDCARE TYPICAL MATERIALS AND FINISHES FETAL ROOF WOOD TRIM. STAINED METAL GUTTER AND DOWNSPOUT. PAINTED WOOD SHADING TRELLIS STAINED WOOD BOARD AND BATTEN SIDING. STAINED WOOD CHANNEL DROP SIDING , STAINED BRICK VENEER SEALED WOOD WINDOWS AHD DOORS. WITH EXTERIOR ALUMINUM CLADDING i--OPTIONAL C.4•LLER-4 STORA6E/ OILETS LOGAT ION III LOUVERS, PAINTED Rem= SENIOR ENTRY PRE-SCHOOL/CHILDCARE - ENCLOSURE WIALL HJMAN SERVICES SENIOR/ADULT SERVICES FIRESIDE LOUNGE/BBQ SENIOR ADULTS WIN& VIEW MOM GAII6PN N AND alkiDD AVIRNIIJIII �QDIIPII')AI LOUN6EMJLTI-PURPOSE/ TERRACE PINING AREA COVERED ENTRY HMAN SERVICES I6. -o. SENIOR ADULTS WIN& o• - = •UiI uiIlIIIIlI!lI1 6AR9A6E/REGYCLIN6 ENCLOSLRE BRICK WOOD/STEEL 6ATE5 MOUNTED LI6HT5 METAL ARE- •• QE- -1411L.Mt _21/2142---ina-au_ ramuu ru 24'-0• 5ITE 516N WITH ADDRESS 10 b HEVAiIOIG PUN ROM .12' 040.4 In• RAT 06 h ;4.1.,171._PLP R .066.16 PAW r:.11 LEVEL J 0 a'_o' NVKH, / J0660411 PATH L SflN TIION AT S3NIIOR ISNTRY I & -t 2 prier 11616111 for CaOC 01711.160111 055..0. DO,1Q1 a MAI/ 6066 RQ�R ]O� .WAW PATI 1•-6' mica* /.0114 16 PA KAR EN]. 00• Xaa 1!1610 Mr CODE DE?HTgU 0�.0. ,00TTOM M 11005 0o' PATH 0 ,6. a r 5 IO ]d COWMMN H1CMi ARRA r 1TP1oAL HOOP. MISTdAiwai 511170.1 VENT SCLAD roof, 141/4701.6 DC1,e dt1OIC 1/VR141 -ARE L•11•: ~FM -_ T BO/•R�1 T _IOH UM.. »e f R�n PLYFIDOD DEATH** _7.X11.41 r_ Nevemif KITL101 COOLER JANTOR liZMOR PO1IR /Waite /WaitENTRANCE PAVILIOII BMR( GAWP/ CROP MFovisi•". aLe FLAIL. ],6/CIOD0,k ,A 66(1 MUTTON AT AIIAIIN IHNPIITIIlY 1' 5• 10' 20' /WRY GAMOPC RELOCATED MALL LOBBY PLALL. HE6 MX: i•n Mrf fK4tlLfi g n c•nV BOARD G AP 1/6610 N/D0.Y It/A6 RCT LOWER CANOM ROOF. 08 66 H6501RT COLII915 DROP OPT PLA4 PLAZA ¢' 41ASV/ R4YG: AOA 5IOKTEL5 LI6111 FIXTURE WAG MGT RAO.EI5ALL WIRT ROOF. aflame u TS. =R1/ CEILING MELS IRYREIELNLGWERED R r1/- CEDAR FACIA / 5601/11/ IE1/AI. 61/TTR / DO.E(POR ♦� COILtb FIRM POOR MR! HALL. ORCH. "ARCH 6' LT6A 6 511Th 1149 BATT 165(64110.: .--(.01X4 POLL PA/B. 566101 RETRACT/1( [LEACHERS ttrr 1111LKt6 / .11661115 PATH 1/86 TRC C ALCM •TMYLMM 6TP1 / IEAR(TSALL POTTER RMIM121ALL / SMASH S1KCTIIGDN AT GYMNASIUM HATOKEVEL 1 3' IV' JO O'C Control No. sr� Epic File No. 1-47g o/az Fee $225.00 Receipt No. ENVIRONMENTAL CHECKLIST A. BACKGROUND 1. Name of proposed project, if applicable: Tukwila 2. Name of 3. Address Community Center applicant: City of Tukwila and phone number of applicant and contact person: 6300 Southcenter Blvd., Suite 100, Tukwila, WA 98188; 433 -0179; Randy Berg (1644) 4. Date checklist prepared: 11/28/94 P1N/6t'D V/1/45 5. Agency requesting checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable) Phase I- Building construction, parking improvements, Duwamish stabilzation and limited landscaping are planned to begin in 1995 and be completed by Spring of 1996. Phase II- The remaining park improvements construction in 1997. River bank Spring of are planned to be under 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A shoreline stabilization study has been completed to determine the best way to treat the Duwamish River shoreline. A Traffic Impact Analysis has been completed to determine appropriate traffic impact mitigations and offsite improvements. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. No RECEIVED JAN 2 0 1995 COMMUNI rY DEVELOPMENT -2- 10. List any government approvals or permits that will be needed for your proposal. U.S. Army Corps of Engineers pe.-mit for work on the shoreline and storm water discharge; Hydraulic Project Approval from Washington State Dept. of Fisheries; Shoreline Substantial Development Permit; Conditional Use Permit; Architectural Review; Building,_., Mechanical, and Electrical,,Construction permits. City of w:Tukwile rFlood ;Zone Control Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. Section E requires a complete description of the objectives and alternates of your proposal and should not be summarized here. The Tukwila Community Center project is planned as a m5`f,000f sq. ft. multi- purpose recreation facility with a gymnasium, fitness, racquet ball, dance, and multipurpose meeting spaces. The completed project will include recreation staff offices, and a senior adult activity center. Exterior improvements will include parking for C.4.14 cars, athletic fields and picnic and other passive recreation improvements. Included in the site improvements will be the required stabilization of the Duwamish River Bank fronting on the subject site. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The Subject Site is a 12.8 acres located on the bank of the Duwamish River. The Site is bounded by 42nd Avenue South, and South 124th Street, located within the South East corner of Section 10 -23 -4. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Nap as environmentally sensitive? Yes- The Duwamish River shoreline is designated as a sensitive area. B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other The Site is essentially flat, eccept for the steep banks of the river. -3- b. What is the steepest slope on the site (approximate percent slope)? 40% to 70% at the river. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. Soils on the site come from a variety of river sediments, and include sands, silts and gravels, and are classified as Puyallup Series. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. e. Yes, there is some evidence of recent erosion and sloughing at the river bank. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. The proposed river bank stabilization work will require removal of approximately 15,000 cubic yards of material from the bank `whichr wi1].ie =reused �onthe ;site'%' '; x311 ^.A..... >,.,...r..n .. ._.. ..... ...._. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. g- Yes- Construction Activities will result in removal of vegetation on the site, making it vulnerable to surface erosion. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 30% of the project site will be covered with impervious surfaces. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Specifications and drawings for construction of all project elements will reflect the provisions of the Land - Altering Ordinance and the King County Surface Water Design Manual for erosion control measures during construction as well as the permanent erosion control neasures included in the river bank stabilization 4an. 2. Air a. -4- What types of emissions to the air would result from the proposal (i.e., dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction exhausts and dusts will be generated during the construction of the project. b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. c. 3. Water No Proposed measures to reduce or control emissions or other impacts to air, if any: The construction site will be watered as required during dry weather to minimize the generation of dust. a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (including year -round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. The Site is bounded to the South by the Duwamish River. 2) Will the project require any work over, in, on, or adjacent to (within 200 feet) of the described waters? If yes, please describe and attach available plans. Yes, the 45:000;'sq. ft. Community Center and various park improvements are planned within 200 feet of the river. Some recontouring and stabilization of the river bank is also planned. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Some material will be removed from the river bank to provide more stable contours and to provide maintenance access to the river bank. The total amount of material removed will be approximately 15,000 cubic yards. -5- 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities, if known. No 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. Yes, a portion of the river bank is within the 100 year floodplain, however no buildings or permanent .mprovements are planned in this area. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities, if known. Storm water will be discharged into the Duwamish River. 2) Describe waste materials that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.) Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Storm water runoff from paved improved impervious surfaces will be collected, treated with a wet vault, coalescing plate oil -water separator and bio- filtration swale0 and discharged to the Duwamish RiveF Aui}off 'fr cof; dra'ina. w 11 f t 40 � l�t,�d�ctiliirgad ;+ S ;rr?i:ri...O±a�pxl�ry � 'rY`i�f�t4T,!i< ..::1 -.:. di`rect�ly, to: the_:,river -6- 2) Could waste materials enter ground or surface waters? If so, generally describe. Yes. Any major construction project presents some risk of this type of impact. However, construction timing and strict controls during construction are observed to prevent such occurrences. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: Storm water will be treated as described in answer 4 -c -1, above. Erosion control methods will be employed during constru_tion to minimze risks of runoff and erosion impacts during construction. 4. Plants a. Check or circle types of vegetation found on the site: x deciduous tree: alder, maple, aspen, other evergreen tree: fir, cedar, pine, other x shrubs x grass x pasture . crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eel grass, millfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? Nearly all of the existing on site vegetation will be removed and the site will be totally relandscaped. River bank vegetation will be left undisturbed except where the river bank,..is i recontoured or armored aganst erosion. 8xetirig 's s F!— blackberr e uWilh lie" .ernoved~ from he,?riy r bank` • tr:M'�b,.o, •.,.-:.^�;..n.r� ,. .` .+:- �... .v •ul7i4ti,_,�,�•r }�� .•a•..,..... ..,,.,;.;. and;; replaced, ;..with'�.nativerparan;specieei c. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The Subject Site will be entirely relandscaped with irrigated lawns and planting beds and will include perimeter trees and screening trees at the parking areas. The river bank will be relandscaped using native riparian species. -7- 5. Animals a. Circle any birds of animals which have been observed on or near the site or are known to be on or near the site: x birds: hawk, heron, songbirds, other: x mammals: beavers, raccoons, squirrels, small rodents x fish: trout, coho salmon, all perhaps some freshwater mussels in watercourses b. List any threatened or endangered species known to be on or near the site. None known. c. Is the site part of a migration route? If so, explain. Yes, the annual salmon migration up the Duwamish River will pass the Subject Site. d. Proposed measures to preserve or enhance wildlife, if any: Proposed development of the Subject Site as a park will preserve open space for habitat. Treatment of the River bank will be aimed at enhancing the aquatic and riparian habitats. 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Completed recreation facilities and buildings will utilize electricity for heating, cooling and lighting. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. c. No' What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Buildings design will incorporate energy conservation alternatives. Where possible, recycled materials will be utilized for construction of improvements. Energy efficient heating, cooling and lighting will be utilized. -S- 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. No 1) Describe special emergency services that might be required. Only routine fire, polite, and first - aid /ambulance capacities. 2) Proposed measures to reduce or control environmental health hazards, if any: Dur ng aoristruct okolimited work hours will be ob'servecl (daytime) to mitigate noise disturbance to local residences. WISHA and OSHA standards will be observed to protect workers during construction. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Truck and other traffic noise exist at the site. Air traffic to and from Boeing field can be heard at the Site. 2) What types and levels of noise would be created by or associated with the project on a short -term or long -term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Construction noise will occur on a short - term basis (restricted to daytime hours). In addition some noise can be expected from spectators and participants at the proposed recreation facilities. 3) Proposed measures to reduce or control noise impacts, if any: Construction will be restricted to daytime hours. Outdoor recreation facilities will include buffer areas to screen excessive noise, and will be scheduled for use during daylight and early evening hours. -9- 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The majority of the Subject Site is currently vacant, with a portion of the site used as a community garden with parking and a small restroom structure. Adjacent properties are residential (east) and commercial (south). b. Has the site been used for agriculture? If so, describe. Yes the site has traditionally been used as pasture land but has not been so used for many years. A portion of the site has more recently been used as a community garden (pea - patch). c. Describe any structures on the sitL. A 150 sq. ft. reatroom building is currently on the site. d. Will any structures be demolished? If so, what? Yes, the existing restroom building will be demolished as part of this project. e. What is the current zoning classification of the site? R -1, 7200 f. What is the current comprehensive plan designation of the site? Parks and Open Space. g. If applicable, what is the current shoreline master program designation of the site? Urban h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Yes, the shoreline of the Duwamish River is currently designated as environmentally sensitive. i. Approximately how many people would reside or work in the completed project? About 15 people will work at the new facility. j. Approximately how many people would the completed project displace? None -10- k. Proposed measures to avoid or reduce displacement impacts, if any: Not applicable 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: None. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low - income housing? None b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low - income housing. None c. Proposed measures to reduce or control housing impacts, if any: None 10. Aesthetics a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The proposed height of the gymnasium and building entrance are now 42 feet. This requires a Variance (approved). Exterior building materials include wood, brick and metal roofing. b. What views in the immediate vicinity would be altered or obstructed? c. None Proposed measures to reduce or control aesthetic impacts, if any: Specific design goals include creating a facility and park which will serve as a sense of pride to the community. The Project will be subject to the requirements of Architectural Review. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Some off -site spread of light from parking area lights and future athletic field lighting is possible during evening hours. -11- b. Could light or glare from the finished project be a safety hazard or interfere with views? No c. What existing off -site sources of light or glare may affect your proposal? None d. Proposed measures to reduce or control light and glare impacts, if any: Parking lot lighting and athletic field lighting will be placed and shielded to minimize unwanted light spread. Athletic events will be scheduled to avoid late night uses. Parking lot lights will be put on a timer to avoid late night glare when the facility is closed. 12. Recreation a. What designed and informal recreational opportunities are in the immedii.:e vicinity? The Allentown Park about 1/2 mile to the north offers a multi -use athletic field and picnicking. The Duwamish River offers boating, fishing and jogging opportunities. b. Would the proposed project displace any existing recreational uses? If so, describe. c. Yes, the existing Allentown pea -patch will be relocated to the Codiga Farm about 1 mile to the east of the subject site. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: The project will include baseball and soccer fields, basketball and tennis facilities, children's play equipment, picnicking, trails and other outdoor recreation facilities. The building will include a gymnasium, racquetball, game room, dance and fitness space, as well as meeting and an adult senior activity center. 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. The Subject Site qualifies to be listed as an archaeologically significant site because of the presence of Indian camp remains. -12- b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. No surface landmarks indicate archaeologic importance, but a subsurface survey of the site has resulted in a dilineated area of the site determined to be of archaeological significance. Lithic tools, fire modified rocks and evidence of food processing on the site date back nearly 2 centuries. c. Proposed measures to reduce or control impacts, if any: An Archaeologist has been included in the project team. The design has deliberately avoided disturbance of the area declared significant. Soils in this area will not be disturbed below the plow zone (about 12 inches). This avoidance will preserve the subsurface archaeology for future investigation. 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The Subject Site is currently served off South 124th Street, and 42nd Avenue South. Future Site access is planned from both of these streets. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? c. Yes, A Metro route passes the site on 42nd. How many parking spaces would the completed project have? How many would the project eliminate? The site improvements will include 330 -parking stalls. Currently the Site has 15 stalls which will be removed. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). The proposed improvements will include frontage improvements to 42nd Avenue South, and to South 124th Street. These improvements will include curb, gutter, sidewalks and lighting. An appropriate contribution to a future signal at the intersection of 124th and 42nd will also be included. e. -13- Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. The adjacent Duwamish River is considered a navigable waterway. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. g- Approximately 1940 trips per day will be generated, 115 peak tripe per hour @ 6:OOpm. It should be pointed out that the proposed Community Center will replace the exisiting Community Center which now generates about 500 trips per day. Proposed measures to reduce or control transportation impacts, if any: The scheduling of activities at the proposed Community Center will seek to avoid large multiple events. 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. As with any development, police and fire protection will increase as a result of the construction of the Community Center. b. Proposed measures to reduce or control direct Impacts on public services, if any. None. 16 Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. City Light will provide electric service, Metro will provide sewer service, The City of Tukwila will provide water to the site. -14- c. Signature The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Date Submitted: %,i. 1`J , /9675 PLEASE CONTINUE TO THE NEXT PAGE. TO BE COMPLETED BY APPLICANT D. SUPPLEMENTAL SHEET FOR NON - PROJECT ACTIONS Because these questions are very general, it may be helpful to read them in conjunction with the list of the elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage,or release of toxic or hazardous substances; or production of noise? Increased impervious surfaces will likely generate increased surface water runoff to the Duwamish River. Increased vehicular traffic flows will likely increase emissions. There is likely to be no impact from improvements planned in this document in terms of toxic substances or noise. Proposed measures to avoid or reduce such increases are: Use of swales and storm water collection and treatment facilities will aid in dealing with runoff. Increased traffic will be partially offset by closing the existing Tukwila Community Center, which currently operates many of the programs planned for the new center. In addition road improvements and contribution to a future traffic light at 124th and 42nd will aid in the smooth flow of traffic around the subject site. 2. How would the proposal be likely to affect plants, animals, fish, or marine life? The site vegetation will be largely removed and replaced with new lawn areas and planting beds. No significant effect to wildlife is foreseen as a result of this project. Proposed measures to protect or conserve plants, animals, fish, or marine life are: River improvements include habitat enhancement and river bank stabilization, which should benefit the aquatic and riparian habitats. 3. How would the proposal be likely to deplete energy or natural resources? The proposed center will use electricity and increased vehicular trips may increase fossil fuel consumption, but the affect on depletion will be negligible. Evaluation for Agency Use Only -15- Proposed measures to protect or conserve energy and natural resources are: Conservation practices will be incorporated into building and heating /cooling system design. 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlands, floodplains, or prime farmlands? Work on the river bank will result in a more stable soils condition and reduced erosion. The designated historically significant area will be protected from subsurface damage, and saved for study by future generations. Proposed measures to protect such resources or to avoid or reduce impacts are: See the answer above. 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? The project will leave about 70% of the site as open space. In addition the shoreline improvements will preserve the shoreline while increasing public access and recreational opportunity. Proposed measures to avoid or reduce shoreline and land use impacts are: See the answer above. How does the proposal conform to the Tukwila Shoreline Master Plan? This proposal is consistent with existing plan. 6. How would the proposal be likely to increase demands on transportation or public services and utilities? This proposal will increase demands through the construction of the new Community Center. Proposed measures to reduce or respond to such demand(s) are: The proposed Community Center is being constructed to meet some of the demands for public services. The Center when completed will meet recreational and meeting needs of the community. Careful scheduling of events to avoid rush hour and peak use traffic generation will help to minimize traffic impacts. -16- 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. This proposal will not conflict with laws at any level. 8. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? If so, what policies of the Plan? No Proposed measures to avoid or reduce the conflict(s) are: Internal review of design proposals by City Officials, Architectural Review by the Architectural Review Board and other required reviews should insure compliance and resolve conflicts. TO BE COMPLETED BY APPLICANT E. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful in reviewing the previous items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the context of the environmental information provided and the submitted plans, documents, supportive information, studies, etc. 1. What are the objectives of the proposal? Provide increased recreational opportunity to Tukwila citizens. Provide a facility to meet the community's needs for meeting and banquet space. provide a senior adult activity center to serve the seniors of Tukwila. Provide a Community Center which will serve as a sense of pride in the Tukwila community. 2. What are the alternative means of accomplishing these objectives? Update and expand the existing Tukwila Community Center. 3. Please compare the alternative means and indicate the preferred course of action: The existing Tukwila Community Center is an old building in a poor location. The costs of expanding and updating the existing building to meet current needs is more expensive than new construction, and will not address the issue of poor location. 4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? No Proposed measures to avoid or reduce the conflict(s) are: none Evaluation for Agency Use Only A F F I D A V I T KzA\ee bir s D Notice of Public Hearing O Notice of Public Meeting O Board of Adjustment Agenda Packet O Board of Appeals Agenda Packet • O Planning Commission Agenda Packet Q Short Subdivision Agenda Packet ' O F D I S T R I B U T I O N hereby declare that: O Notice of Application for Shoreline Management Permit Shoreline Management Permit fl Determination of Non - significance I1 Mitigated Determination of Nonsignificance ODeterminatioh of Significance and Scoping Notice 0 Notice of Action riS was mailed to each of the followin g addresse on (b laI.� ,5e c a.--3 can e Cs* C C s c_9 liriCk I) I L.13aloeis Name of ProjectV A\(ii►) &.- CCW\rn•CO Signatur File Number L1 - C)109- S'q%- TUKLO I LA CO M WON rJL CHECKLIST: ENVIR MENTAL REVIEW /SHORELINE PERMIT MAILINGS PM a-eA ,M,b NC 3) FEDERAL AGEN IES 4 ( U.S. ARMY CORPS OF ENGINEERS ( U.S. ENVIRONMENTAL PROTECTION AGENCY )FEDERAL HIGHWAY ADMINISTRATION ( )U.S. DEPARTMENT OF H.U.D. (REGION X) ( )DEPT. OF INTERIOR -FISH & WILDLIFE SERVICE WASHINGTON STATE AGENCIES / OFFICE OF ARCHAEOLOGY TRANSPORTATION DEPARTMENT DEPT. OF NATURAL RESOURCES )OFFICE OF THE GOVERNOR (� )DEPT. OF COMMUNITY DEVELOPMENT //(XDEPT. OF FISHERIES ( )K.C. PLANNING & COMMUNITY DEV. ( )BOUNDARY REVIEW BOARD ( )FIRE DISTRICT #11 )FIRE DISTRICT #2 r -c... 5UF.FAG0 UJAT�fz.M A ( )SOUTH CENTRAL SCHOOL DISTRICT ( )TUKWILA LIBRARIES ( ) RENTON LIBRARY ( )KENT LIBRARY ( )CITY OF SEATTLE LIBRARY ( )US WEST ( )SEATTLE CITY LIGHT ( )WASHINGTON NATURAL GAS ( )WATER DISTRICT #75 ( )SEATTLE WATER DEPARTMENT ( )GROUP W CABLE ( )OLYMPIA PIPELINE ( )KENT PLANNING DEPARTMENT ( )TUKWILA CITY DEPARTMENTS: ( )PUBLIC WORKS ( ) FIRE ( )POLICE ( )FINANCE ( )PLANNING ( )BUILDING ( )PARKS AND ORECREATION ( )TUKWILA MAYOR ( )DEPARTMENT OF SOCIAL & HEALTH SERVICES EPT. OF ECOLOGY, SHORELANDS DIVISION DEPT. OF ECOLOGY, SEPA DIVISION* )DEPARTMENT OF WILDLIFE 41OFFICE OF ATTORNEY GENERAL *SEND CHECKLIST WITH DETERMINATIONS AND *SEND SITE MAPS WITH DECISION KING COUNTY AGENCIES ( ( ( )KING COUNTY DEPT. OF PARKS )HEALTH DEPARTMENT )PORT OF SEATTLE )BUILDING & LAND DEV. DIV.- SEPA INFORMATION CENTER SCHOOLS /LIBRARIES ( )HIGHLINE SCHOOL DISTRICT ( )KING COUNTY PUBLIC LIBRARY ( )SEATTLE MUNICIPAL REFERENCE LIBRARY ( )SEATTLE SCHOOL DISTRICTS ( ) RENTON SCHOOL DISTRICT UTILITIES ( )PUGET SOUND POWER & LIGHT ( )VAL -VUE SEWER DISTRICT ( )WATER DISTRICT #20 ( )WATER DISTRICT #125 ( )CITY OF RENTON PUBLIC WORKS ( )RAINIER VISTA ( )SKYWAY CITY AGENCIES (.) RENTON PLANNING DEPARTMENT ( )CITY OF SEA -TAC ( )CITY OF SEATTLE ( )CITY OF BURIEN ( )TUKWILA PLANNING COMMISSION MEMBERS ( )TUKWILA CITY COUNCIL MEMBERS OTHER LOCAL AGENCIES ( )PUGET SOUND REGIONAL COUNCIL ( )P.S. AIR POLLUTION CONTROL AGENCY (d/ )SW K.COUNTY CHAMBER OF COMMERCE �SUCKLESHOOT INDIAN TRIBE DUWAMISH INDIAN TRIBE MEDIA ( )DAILY JOURNAL OF COMMERCE ( )VALLEY DAILY NEWS • ✓ { .'L4rfc. , /LCuc Les 4o7 /17 5A METRO ENVIRONMENTAL PLANNING DIV. OFFICE /INDUSTRIAL 5,000 GSF OR MORE RESIDENTIAL 50 UNITS OR MORE RETAIL 30,000 GSF OR MORE ( ) HIGHLINE TIMES ( )SEATTLE TIMES /0 eed- 7f7h-w PUBLIC NOTICE MAILINGS FOR PERMITS SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section Applicant Other agencies as necessary (checked off on attached list) Include these documents: SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Dlstribution (notice was mailed & sent to newspaper). SHORELINE MAILINGS Notice of Application: Notice of application for a substantial development Permit must be mailed to owners and to property owners within 300 feet of subject property, prepare an affidavit of publication, and publish two consecutive weeks with deadline for comments due 30 days after last newspaper publication date. Shoreline Permit: Mail to: (within 8 days of decision; 30 -day appeal period begins date received by DOE) Department of Ecology Shorelands Section State Attorney General Applicant Indian Tribes Other agencies as necessary (checked off on attached list). Include these documents: Shoreline Substantial Development Permit (3 -part form from Sierra) Findings (staff report, if applicable) Shoreline Application Form (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Site plan, with mean high water mark & improvements Cross - sections of site w /structures & shoreline Grading plan -determination map SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed & sent to newspaper) Affidavit of Publication (notice was published in newspaper). WA STATE DEPT FISHERIES /WILDLIFE 16018 MILL CREEK BLVD MILL CREEK WA 98012 METRO: ENVIRONMENTAL PLANNING DIV 821 2nd AVE MS 82 SEATTLE WA 98104 -1598 •c WASHINGTON STATE ATTORNEY GEN. 4407 WOODVIEW DRIVE S.E. MAIL STOP QA -44 OLYMPIA, WA 98503 -8077 WA STATE OFFICE OF ARCHAEOLOGY 111 W 21ST ST KL -11 OLYMPIA WA 98504 KING COUNTY SURFACE WATER MGMT 710 2ND AVE, ROOM 3701 SEATTLE WA 98104 ATTN: ANDY LEVESQUE, SR ENGR. DUWAMISH INDIAN TRIBE 212 S WELLS RENTON WA 98055 Environmental Protection Agency Water Resources Monitoring Sect. 1200 Sixth Avenue Seattle, WA 98101 Pat Cagney • Environmental Resources Army Corps of Engineers 4735 East Marginal Way Seattle, WA 98124 -2255 WA STATE DEPT OF NATURAL RESOURCES P 0 BOX 47001 OLYMPIA WA 98504 -7001 ENVIRONMENTAL REVIEW SECTION DEPT. OF ECOLOGY P 0 BOX 47703 OLYMPIA WA 98504 -7703 KAREN WALTER MUCKLESHOOT INDIAN TRIBE FISHERIES DEPT 39015 172ND AVE SE, AUBURN WA 98092 .. MR RODERICK MALCOM MUCKLESHOOT INDIAN TRIBE FISHERIES DEPT 39015 172ND AVE SE AUBURN WA 98092 MR ROBERT G WHITLAM STATE OF WASHINGTON P 0 BOX 48343 • OLYMPIA WA 98504 -8343 OFFICE OF PUBLIC ARCH. CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: WA STATE OFFICE OF ARCHAEOLOGY 111 W'21ST ST KL -11 OLYMPIA WA 98504 TO: DUWAMISH INDIAN TRIBE 212 S WELLS RENTON WA 98055 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: KING COUNTY SURFACE WATER MGMT 710 2ND AVE, ROOM 3701 SEATTLE WA 98104 ATTN: ANDY LEVESQUE, SR ENGR. r CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: ENVIRONMENTAL REVIEW SECTION DEPT. OF ECOLOGY P 0 BOX 47703 OLYMPIA WA 98504 -7703 ti �' . i cif ! t',�iL+�!iJ',•�•• ,'�,�1'„Jyr,4T 'n:.� n. ft• fil ark. �i. �4 `�:� f ?t MOO CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: Environmental Protection Agency Water Resources Monitoring Sect. 1200 Sixth Avenue Seattle, WA 98101 fa' CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: WA STATE DEPT OF NATURAL RESOURCES P 0 BOX 47001 OLYMPIA WA 98504 -7001 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: Pat Cagney - Environmental Resources Army Corps of Engineers 4735 East Marginal Way Seattle, WA 98124 -2255 l �!!v A !1 4N r~C � �Fa �w !< < n;L'ry i ��f�1r.t+:� �3 +'f��, F•��j�•!��> �h; i �•. . Y ' 1,., -. r... gar; i i �. r.- .,t .! r: t �,., �';1' y.. ,,• ;t l�h CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 FIX): WA STATE DEPT FISHERIES /WILDLIFE 16018 MILL CREEK BLVD MILL CREEK WA 98012 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: WASHINGTON STATE ATTORNEY GEN. 4407 WOODVIEW DRIVE S.E. MAIL STOP QA -44 OLYMPIA, WA 98503 -8077 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 (TO: METRO: ENVIRONMENTAL PLANNING DIV 821 2nd AVE MS 82 SEATTLE WA 98104 -1598 CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: KAREN WALTER MUCKLESHOOT INDIAN TRIBE FISHERIES DEPT 39015 172ND AVE SE AUBURN WA 98092 .. I ��^ CITY OF TUKWILA 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 __.__._._..__._...__.__._ (206) 433 -1800 TO: MR RODERICK MALCOM MUCKLESHOOT INDIAN TRIBE FISHERIES DEPT 39015 172ND AVE SE AUBURN WA 98092 CITY OF TUKWILA . 6200 SOUTHCENTER BLVD. TUKWILA, WA 98188 -2599 (206) 433 -1800 TO: MR ROBERT G WHITLAM STATE OF WASHINGTON P 0 BOX 48343 OLYMPIA WA 98504 -8343 OFFICE OF PUBLIC ARCH. I A F F I D A V I T Sylvia A. Osby O Notice of Public Hearing fl Notice of Public Meeting El Board of Adjustment Agenda Packet O Board of Appeals Agenda Packet fl Planning Commission Agenda Packet Li Short Subdivision Agenda Packet OF DISTRIBUTION hereby declare that: fl Notice of Application for Shoreline Management Permit 0 Shoreline Management Permit LI Determination of Non - significance XXX Mitigated Determination of Nonsignificance Determination of Significance and Scoping Notice ❑ Notice of Action 0 Official Notice 0 Other 0 Other was mailed to each of the following addresses on February 8, 1995 . FAXED TO SEATTLE TIMES (Published 2/10/95) MAILED TO DEPARTMENT OF ECOLOGY -SEPA MAILED TO FRIENDS OF THE DUWAMISH MAILED TO THE MUCKLESHOOT TRIBE MAILED TO SURROUNDING PROPERTY OWNERS SENT TO MAYOR, CITY CLERK, PUBLIC WORKS Name of Project TUKWILA COMMUNITY CENTER File Number L94 -0104 METRO ENVIRONMENTAL PLANNING OFFICE OF ARCHAEOLOGY DEPARTMENT OF FISHERIES Signatur G< A CHECKLIST: ENV: INMENTAL REVIEW /SHORELINE ( RMIT MAILINGS FEDERAL AGENCIES ( )U.S. ARMY CORPS OF ENGINEERS ( )FEDERAL HIGHWAY ADMINISTRATION ( )DEPT. OF INTERIOR -FISH & WILDLIFE SERVICE ( )U.S. ENVIRONMENTAL PROTECTION AGENCY ( )U.S. DEPARTMENT OF H.U.D. (REGION X) WASHINGTON STATE AGENCIES ()OFFICE OF ARCHAEOLOGY ( )TRANSPORTATION DEPARTMENT ( )DEPT. OF NATURAL RESOURCES ( )OFFICE OF THE GOVERNOR ( )DEPT. OF COMMUNITY DEVELOPMENT DEPT. OF FISHERIES ( )K.C. PLANNING & COMMUNITY DEV. ( )BOUNDARY REVIEW BOARD ( )FIRE DISTRICT #11 ( )FIRE DISTRICT #2 ( )SOUTH CENTRAL SCHOOL DISTRICT ( )TUKWILA LIBRARIES ( ) RENTON LIBRARY ( )KENT LIBRARY ( )CITY OF SEATTLE LIBRARY ( )US WEST ( )SEATTLE CITY LIGHT ( )WASHINGTON NATURAL GAS ( )WATER DISTRICT #75 ( )SEATTLE WATER DEPARTMENT ( )GROUP W CABLE ( )OLYMPIA PIPELINE ( )KENT PLANNING DEPARTMENT ( )TUKWILA CITY DEPARTMENTS: ( )PUBLIC WORKS ( ) FIRE ( )POLICE ( )FINANCE ( )PLANNING ( )BUILDING ( )PARKS AND ORECREATION ( )TUKWILA MAYOR ( )DEPARTMENT OF SOCIAL & HEALTH SERVICES DEPT. OF ECOLOGY, SHORELANDS DIVISION tp4DEPT. OF ECOLOGY, SEPA DIVISION* )DEPARTMENT OF WILDLIFE ;OFFICE OF ATTORNEY GENERAL *SEND CHECKLIST WITH DETERMINATIONS AND *SEND SITE MAPS WITH DECISION KING COUNTY AGENCIES ( )KING COUNTY DEPT. OF PARKS ( )HEALTH DEPARTMENT ( )PORT OF SEATTLE ( )BUILDING & LAND DEV. DIV.- SEPA INFORMATION CENTER SCHOOLS /LIBRARIES ( )HIGHLINE SCHOOL DISTRICT ( )KING COUNTY PUBLIC LIBRARY ( )SEATTLE MUNICIPAL REFERENCE LIBRARY ( )SEATTLE SCHOOL DISTRICTS ( ) RENTON SCHOOL DISTRICT UTILITIES ( )PUGET SOUND POWER & LIGHT ( )VAL -VUE SEWER DISTRICT ( )WATER DISTRICT #20 ( )WATER DISTRICT #125 ( )CITY OF RENTON PUBLIC WORKS ( )RAINIER VISTA ( )SKYWAY CITY AGENCIES ( ) RENTON PLANNING DEPARTMENT ( )CITY OF SEA -TAC ( )CITY OF SEATTLE ( )CITY OF BURIEN ( )TUKWILA PLANNING COMMISSION MEMBERS ( )TUKWILA CITY COUNCIL MEMBERS OTHER LOCAL AGENCIES ( )PUGET SOUND REGIONAL COUNCIL ( )P.S. AIR POLLUTION CONTROL AGENCY ( )SW K.COUNTY CHAMBER OF COMMERCE 'Q MUCKLESHOOT INDIAN TRIBE K DUWAMISH INDIAN TRIBE MEDIA ( )DAILY JOURNAL OF COMMERCE ( )VALLEY DAILY NEWS 14METRO ENVIRONMENTAL PLANNING DIV. OFFICE /INDUSTRIAL 5,000 GSF OR MORE RESIDENTIAL 50 UNITS OR MORE RETAIL 30,000 GSF OR MORE 6rIGHLINE TIMES EATTLE TIMES �� ArrA6tr ,r �e F4o /24-7-770s,. PUBLIC NOTICE MAILINGS FOR PERMITS SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section Applicant Other agencies as necessary (checked off on attached list) Include these documents: SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Dlstribution (notice was mailed & sent to newspaper). SHORELINE MAILINGS Notice of Application: Notice of application for a substantial development Permit must be mailed to owners and to property owners within 300 feet of subject property, prepare an affidavit of publication, and publish two consecutive weeks with deadline for comments due 30 days after last newspaper publication date. Shoreline Permit: Mail to: (within 8 days of decision; 30 -day appeal period begins date received by DOE) Department of Ecology Shorelands Section State Attorney General Applicant Indian Tribes Other agencies as necessary (checked off on attached list). Include these documents: Shoreline Substantial Development Permit (3 -part form from Sierra) Findings (staff report, if applicable) Shoreline Application Form (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Site plan, with mean high water mark & improvements Cross - sections of site w /structures & shoreline _ Grading plan Vicinity map SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed & sent to newspaper) Affidavit of Publication (notice was published in newspaper). ROD MALCOM FISHERIES DEPT MUCKLESHOOT INDIAN TRIBE 39015 - 172ND AVE SE AUBURN WA 98002 ROD MALCOM FISHERIES DEPT MUCKLESHOOT INDIAN TRIBE 39015 - 172ND AVE SE AUBURN WA 98002 WALTER PACHECO COMMUNITY SERV MUCKLESHOOT INDIAN TRIBE 39015 - 172ND AVE SE AUBURN WA 98002 WALTER PACHECO COMMUNITY SERV • MUCKLESHOOT INDIAN TRIBE 39015.- 172ND AVE SE AUBURN WA 98002 ANDY LEVESQUE KING COUNTY SURFACE WATER MNGT KING CO PUBLIC WORKS 400 YESLER WY ROOM 400 SEATTLE WA 98104 ANDY LEVESQUE KING COUNTY SURFACE WATER MNGT KING CO PUBLIC WORKS 400 YESLER WY ROOM 400 • SEATTLE WA 98104 DR MICHAEL SILVER SOUTH CENTRAL SCHOOL DISTRICT 4640 S 144TH TUKWILA WA 98188 DR MICHAEL SILVER SOUTH CENTRAL SCHOOL DISTRICT 4640 S 144TH TUKWILA WA 98188 Re: 01- 79- 0032 -38 (12400 42nd Ave S) Verline E Harris 10529 SE 213th St Kent WA 98031 -2046 Re: 01- 79- 0000 -80 (12244 42nd Ave S) Resident 12244 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0001 -00 (12258 42nd Ave S) Larry & Evelyn Howe 14548 SE 51st St Bellevue WA 98006 Re: 01- 79- 0001 -40 (12247 43rd Ave S) Curtis J Sweeney 12253 43rd Ave S Tukwila WA 98178 Re: 01- 79- 0003 -00 (12240 43rd Ave S) Sandra Deleza 12240 43rd Ave S Tukwila WA 98178 Re: 01- 79- 0003 -20 (4304 S 124th St) Kim M Anderson 112 5th Ave SW Pacific WA 98047 Re: 01- 79- 0003 -40 (4316 S 124th St) Jeffrey Greenway 4316 S 124th St Tukwila WA 98178 Re: 01- 79- 0003 -65 (12249 44th Ave S) Laurence Weikum 12249 44th Ave S Tukwila WA 98178 Re: 01- 79- 0005 -55 (4408 S 124th St) Jim Joslyn 4408 S 124th St Tukwila WA 98178 Re: 01- 79- 0005 -75 (4426 S 124th St) Resident 4426 S 124th St Tukwila WA 98178 Re: 01- 79- 0032 -38 (12400 42nd Ave S) Resident 12400 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0000 -90 (12250 42nd Ave S) James & Jessie Baker 19 East Cresta Way Chula Vista CA 91910 Re: 01- 79- 0001 -00 (12258 42nd Ave S) Resident 12258 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0002 -90 (12248 43rd Ave S) Jack Jay Carlson 2024 S 304th St Federal Way WA 98003 -4845 Re: 01- 79- 0003 -15 (12254 43rd Ave S) Phillip E '& Charlene Gearhart 219 S 107th St Seattle WA 98168 Re: 01- 79- 0003 -20 (4304 S 124th St) Resident 4304 S 124th St Tukwila WA 98178 Re: 01- 79- 0003 -50 (4318 S 124th St) Laurie Dearinger 4318 S 124th St Tukwila WA 98178 Re: 01- 79- 0003 -80 (12245 44th Ave S) Gayle M Jacobsen 12245 44th Ave S Tukwila WA 98178 Re: 01- 79- 0005 -65 (4412 S 124th St) David J Siquaw 4412 S 124th St Tukwila WA 98178 Re: 01- 79- 0005 -35 (12254 44th Ave S) James D Hunley 12254 44th Ave S Tukwila WA 98178 Re: 01- 79- 0000 -80 (12244 42nd Ave S) Ben Kolstad 12238 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0000 -90 (12250 42nd Ave S) Resident 12250 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0001 -05 (4208 S 124th St) Frederick F Walker 4208 S 124th St Tukwila WA 98178 Re: 01- 79- 0002 -90 (12248 43rd Ave S) Resident 12248 43rd Ave S Tukwila WA 98178 Re: 01- 79- 0003 -15 (12254 43rd Ave S) Resident 12254 43rd Ave S Tukwila WA 98178 Re: 01- 79- 0003 -30 (4306 S 124th St) Cassandra Extine 4306 S 124th St Tukwila WA 98178 Re: 01- 79- 0003 -60 (12253 44th Ave S) Ioan Nistor 12253 44th Ave S Tukwila WA 98178 Re: 01- 79- 0005 -50 (4402 S 124th St) Donald & Juanita Leckband 4402 S 124th St Tukwila WA 98178 Re: 01- 79- 0005 -75 (4426 S 124th St) Robert J Levack 29707 4th Ave SW Federal Way WA 98023 Re: 01 -79- 0005 -25 (12242 44th Ave S) Aaron Prestegaard 12242 44th Ave S Tukwila WA 98178 Re: 01- 79- 0006 -00 (12245 45th Ave S) Lorene L Mathis 12245 45th Ave S Tukwila WA 98178 Re: 01- 79- 0007 -85 (4518 S 124th St) George G Gomez 4504 S 124th St Tukwila WA 98178 Re: 01- 79- 0007 -45 (12244 45th Ave S) Arthur & Brenda Burrington 12244 45th Ave S Tukwila WA 98178 Re: 01- 79- 0008 -20 (12245 46th Ave S) Resident 12245 46th Ave S Tukwila WA 98178 Re: 01- 79- 0009 -85 (Lot 19 -20 Allntwn Add) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01- 79- 0010 -25 (12253 47th Ave S) Charlie & Rose Marie Ross 12253 47th Ave S Tukwila WA 98178 Re: 01- 79- 0030 -25 (Lot 5 -7 Blk 14 Allntwn) Mackey L White 4615 S 124th St Tukwila WA 98178 Re: 01- 79- 0027 -15, 35, 36 (4609, 4621, 4627 S 125th St) Stephen A Pearce 605 SW Ambaum Blvd Seattle WA 98166 Pam Carter 4115 S 139th St Tukwila WA 98168 Nancy Lamb Foster Community Club 4251 S 139th St Tukwila WA 98168 Re: 01- 79- 0005 -85 (12253 45th Ave S) Roe S Decker 12253 45th Ave S Tukwila WA 98178 Re: 01- 79- 0007 -85 (4518 S 124th St) Resident 4518 S 124th St Tukwila WA 98178 Re: 01- 79- 0008 -10 (12253 46th Ave S) Arben Marku 12253 46th Ave S Tukwila WA 98178 Re: 01- 79- 0009 -65 (12246 46th Ave S) Thomas M Applegate 12246 46th Ave S Tukwila WA 98178 Re: 01- 79- 0009 -95 & 1005 (4610 S 124th St, Lot 23 Allntwn Add) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01- 79- 0030 -05 (4603 S 124th St) Albert D Capellaro 1728 Lake Ave S Renton WA 98055 Re: 01- 79- 0030 -30 (4623 S 124th St) Jacqueline Baca 4623 S 124th St Tukwila WA 98178 Re: 00-04-8000-03 (12600 Interurban) Sammis PCA Partners Saris Regis Group 6755 S 216th St Kent WA 98032 Karen Walter Muckleshoot Indian Tribe Fisheries Dept 39015 172nd Ave SE Auburn WA 98092 Virginia Cross, Chairperson Muckleshoot Indian Tribe 39015 172nd Avenue S.E. Auburn, WA 98002 Re: 01- 79- 0007 -82 (4504 S 124th St) George G Gomez 4504 S 124th St Tukwila WA 98178 Re: 01- 79- 0007 -55 (12252 45th Ave S) Harry & Arlene Steinberg 12252 45th Ave S Tukwila WA 98178 Re:01- 79- 0008 -20 (12245 46th Ave S) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01- 79- 0009 -75 (12252 46th Ave S) Eldon Knight 12252 46th Ave S Tukwila WA 98178 Re: 01- 79- 0010 -10 (4616 S 124th St) David C Swanson 4616 S 124th St Tukwila WA 98178 Re: 01- 79- 0030 -05 (4603 S 124th St) Resident 4603 S 124th St Tukwila WA 98178 Re: 01- 79- 0027 -00 (4603 S 125th St) Iwao Hirano 4603 S 125th St Tukwila WA 98178 Re: 00 -04- 8000 -02 (12642 Interurban) Seattle City Light Property Mangement 1015 Third Ave Seattle WA 98104 armielgoiwimpammemillibub Rod Malcom, Fisheries Dept. Muckleshoot Indian Tribe 39015 172nd Avenue S.E. Auburn, WA 98002 Dr. Robert Whitlam, Archaeologist WA State Office of Archaeology 111 21st Avenue S.W. Olympia, WA 98504 -8343 anigisporomminIssop Mr. Roger Baker Duwamish Improvement Club 11662 42nd Avenue South Tukwila, WA 98168 Mr. Phil Schneider WA DEPT. OF FISH & WILDLIFE 16018 Mill Creek Boulevard Mill Creek, WA 98012 7„N11117.0,V VRl IG LIST C.IVI GR IG AND DRAINAGE PLAN GR IG AND DRAItIAC E DETAILS RIVERBANK X—SECTIONS RIVI WANK X—SECTIONS • =ARC: . _ 1•N 1.11 N{ 11•411 _ . Z•tItL •• •••13.»'I In 01011 _,12.01 ••. ELECTRICAL ELECTRICAL SITE PLAN LANDSCAPE SUE PLAN PLANTING PLAN ENLARGED RIVERBANK PLAN VEST ENLARGED RIVERBANK F'LA4 FAST PLAN rIN' SCHEDULE LANLJSGAPE DETAILS ARCHITECTURAL FIRST FLOOR PLAN . FIRST FLOOR PLAN EXTERIOR ELEVATIONS EXTERIOR ELEVA'!O EXTEP.IOR ELEVAT!C:'S BOLDING ti'C'EG SE., ;ECUS club _— BOARD - • ---- ARCHITECIURAL- REVIEW --• — Yu! t•11* -1'C t+oact!4 . 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SUIIC 515 4CATILL •254244104 04201 (zoo 602-3052 .•,./ .-1111 .■11ab. d/ .111111117'21.1MILTIIIN e..-preLogratim se. AIRMITAIME al-ITARTgals":21:r. 7111 A.. °I MINEWMAIPZIWIMWMPIMPANIgibt: "m1:111.;ff2111.047rmgi • .. 111NYMil ` 41 burr■������/tri;�����1 • �I aTTenoaaaoeaoot+rr `,.'11101: 1 �a��>rh �el'46 `.. i iurt Draw : NNW' NMI NUE . UD _,, I_ 1 6'Q'11 J.611At1 It 61aT _ _MAW=16112.111111 _ - 16i6w2 Pot_ _ww =SUM - __MUM 9912921-- 1211. NM .sR1211.N _- ,emm1611 _116192e91212A9_ 8 !of �`2fe !!\`.• C 2r J. O rOrabQ'�i� /t,ee • Vie: /e e. /2 56 .e• _!o2 -�e! 0 20 40 60 FEET SCALE IN SCALE FEET pert a 3,9 HOUGH BECK & BAIRR INC. LAMSCAPE ARCHITECTURE PLANNING 1 URBAN DESIGN 1000 le..ORA 0000(7. SUITE 510 51021(1. •09.05100 96121 (006) 612-101 MOM_ .0ECL1¢9RN 16Ik -L== 11 0 i Iao.0 — 19 – 19 • • �f �• g."'" •% t - -0a 44 1-2w 510 -538 _sal ^560 _ .5t3— TOE 5srTOE OF SLOPE -)0 !0 •a1 LIMIT OF GRADING �• 89 0 20 40 60 SCALE IN FEET P ER 16.112▪ •• 1•301(1 agerCAS 56. 211 K EYMAP / HOUGH BECK & BAIRD INC. LAICSCAPE ARCHITECT'S( RAINING 1 URBAN DESIGN 551111 0011. 55616611MONA 0 11101 511 (206) 18=-3051 5‘RE' gt4 YR11t16-_ . nt sNa•sY _JOY 1161A111 1.11111 _1111.11111110111-- _Irt 1 a115-111- mwa ~-1 __MPS )110114 _ 4040_42. 4.144 x[t PLANT SCHEDULE STM. OTT. SCIENTIFlC/COMMON NAME SIZE/REMARKS O S, la TREES A(.. 6700. 'Red 540+.1' RCD SUNSET MAPLE 119.41 PATH. KM.. RED CEDAR 9 (400.x,6& • 1.70041 / LE*LA70 CT0*E55 25 7e Tbb <watt0 704.1.00 =KLAN U1110E0 IMDON Pru. *090(006 07AN0CLEE6 FLOWERING PEAR O 17 T69. MI«p72l0 9(57(67* 771199001 NF 7 010641090 mp*Rlc COJ".AAS HIR O ] 31 0 07 ® 5 AC« 6k tum WC MAPLE B.,W. Jouwnont9 JACO/AN.NTI 91107 Uo oI 9.ene:6ve '*apnk Bevy 9A,LSOC 6(4677 (0(6fRE(N MA010LI4 Act. nrbotn '90.7.01' BOWL!. 9.01E 11 7 [01007471070 )000.100.00 RAT976A Pan&liO pn+kO PERSIAN 0044000 C0{u• 074.00 TURKISH CAERE Ou 6v1 rub.[ RED OAK AVM 07470100 JAPANESE MAPLE C6nu. kwsa KOISA DOGWOOD 0d09e11.41 6104((.0s INCENSE CEDAR AUSMUN 0611 Ovine*. robot To,I(aIe COUAMARC ENQAN OAK 0,0..64 10111410 OREGON ASN 2' Cd. 476 1000...8 b.0.9A.0 •/ str0101 trunk • Antral Node. 6'-6' NT:BAILI . 949noh.a / 41r0Tp.I Vwk & 4.0007 Naas. 04:7(0 • <.0674 .. r 04:670.00 0009.4 .1 .1,01101 1r4M • 1.01,74 2' Cul 640:..8 700019.0./ .7(07909 1nN a 6001174 100« 6'-0' *1_009:000 9.0,&0 ./ straIgnt Punk • 9.0401 bed.. 0'-B' 61,0IB.6.4 6.000006 0/ slre.0.7 14406 a centro 1000«. 1401 .0.000. 6'-111 *14010,04 EMenc.4../ 70F Ib.. (3) main tlaN. 2' ed.:819: Apbo.. 0/2 Nees WHAT be nV6-76«.k.0. 1-3/4' Cd:BAB:WHI 0.000,411 0/760:9.1 Duni a 601(0* bed« 2' Cal .6k9.19.4 &on9M6 ./ stra101 7,44* & 6.047 Lads, 2'-2-I/2' C4 TOATOO.8 0,000.7 0/ 01101901 IrUnk • e.0767 I406.' • C7:076.6.8 b,m1006 ./ •1(0~01 Irv., a <ward 7.ed0 6'-e' Nu916.010 &000,04 0/ .1101991 (D06.7. & 0.09(74 1004« 2' C7:699.0.0 Ranched./ ..eyN Inmk • centra 1.e4.. 2' Cd.:END:Wen B 'm„ ed % 1019.1 (lank k 117 Node, r C01:61,9.W.0 &.090.0./ .N09nt Punk • <.01107 1.06.. 2• C7:810:116 0(00074.0./ (ra:9Ot (lark & (.0474 loader 2' (74.1010:0.0 9,0.96191 ./ min. U.A. (3) Twain irinl. 2' Cat:8/8:0.. 15.6.0•11 6/ min. U.. (3) NUN. 6'-6' *14819.009 8.en6114d ./ slraTVTI Dunk & 6.01(74 9.0074, 6'-0' NI :019...8 & md0.d ./ .7601917 Mama & 0:007,7 Nods, 2' C61.:099:0.8 0'00671.d straIghl (7701 k <antra, 1.04.. 6'-0' NI_-1B1*04 &mN04 / strakfIl Ilank k central 7004.. STM. OTT. SCIENT)i1C/CO3.1.0N NAME O le O 3 SHRUBS SIZE/REMARKS RRe6e6rrlen f<Irdnnrm Vs. Awl KW JANECK 0710000(NORp4 • .0011 '(0.0 1004 - MIEN ISLAND HOLLY kburroun• 414.4 DANE/ MERANO. / Cm74. 7e N*2ELNJT Osm6b brI•000 p59ARTA D edra. 6040 *NEER DAPHNE 304 01144 0070 0095 7460E8519* 0001905E O 35 DCum10w0,0l dela '6000x1.' .0R0 •4.0,( 0691 ® 294 O 17 6 29. O 25 O e y 09 o 433 ve.H.kon owt4.. ELE601EEN MKRL(8(000 Ame1/41.e09er 7017710/ SE*NCEBER0Y 9040010 e6u77eku6 '067000.70' CO0PAC1 OREGON CRAPE 09040000000 'Vn.Oni 00,509E R00DOOENp 94 Rn044000000 '110na0e RA0APO R0000DENIRON Arbutus 00646'.00000070' CCNNACT STRAWBERRY TREE • 1*K00«40,. 'Otte Lv7&00 OTTO 1U17N LAUREL O 30 RDisiEo00(D 2702 0477. 406 156 154 306 IS' -le' 50.040M/Cm14 rW a .M 446006 15•-16' N14B1B/C«r1_0W k N.8 70000,.0 10'-12' Sa.o4.0115/C0n17 FW • .64 0,001004 4•-5' 07.1006/Cmt.1 mW t .w 0,.0(9.0 M, IN.. (3) md0 1,5061 21'-30' 50..91,666/C0.1.: r0 a .44 Wombed 1e--21' *1:8/8/f L:r, a ..8 70010006 50.44610/c0t.1I41 & ..8 0(000006 21•-20. 01J618/Cm14 fW k .60 000004 IS• -le• 01.:041B/C064 rw a .0 Aswan. 15•-10. 6(4018/ 00044(44 & ..8 1000,.6. 15'-16- IR ;B&B/ C01.;r*0 k .0 bmd,Od. le' -21' 50.00,0&8/0007~ Ft. & .401 Wede4 16'-27. 760.00966/11en14 010 a .01 budded 21'-20' NL:019/ Cent.:FW .41 M60N06. 10--27. 50.04.606/1101.1 rw k .40 woad 21•-24• Nt:1319/ C.01;010 a ..0 0,0060.4 EMERGDI1S (SWALE EMERGENTS) 36ncu1 .71460 SOFT RUSH 000900,1. pdustrls 501.E *USN Skipu+ amlus *40031(0 DOMPOS4 Juncut 7.00;0 SUNDER RUSH PLANTING NOTE: BARE ROOT. TULL IMO NEU ROOTED PLANTS 57411 BE PLANTED N A 6809009 PATTERN AT (610(1 05)604E5 ON CENTER TRIANGULAR SPACING M 001T017 DE DRANAGE SwALE 4 PLANT 901(41015 16000$[0 ma ACCESS BENCH AND 100ER DANK AREA ARE CON75(0ED BY KING COUNTY SURFACE WATER TO BE COCO FOR RAR BANK 5600032(11011 01LRE 11000 CR SALT 0EDGE CONDITIONS NAY OCCUR. PLANT SELECTION BASED 0604 TELEPHONE CORKRSATION YM RUM 5000110[6 or 6040 COUNTY SURFACE WATER NANAON(NT. ME KING Emir" 9701 ACE 007(4 GODEUNES FOR BANK 0TA9L12An0N P002CT5 DOCS NOT 0RONOE 4 UST OF SALT TOLERANT PLANTS FOR SNOREINE RESTORATION PROJECTS (TOUGH BECK & 13AIRD INC. LA745CAPC ARCHITECTURE PLANNING a URBAN DESIGN 1050 LENORA SHOEL+. SUITE 516 5(011LL. .05•INGION 91191 (206) 652-5051 0471. .0900 11«.4, STM. OTY, SOENTIFIC/COMMON NAME CROUNOCOSiRS SZE/REMARKS .718 5*..10 IaMm O 2"4410.10 n«m•o CASCADE MAK 646 (1st*. 'Dols *970,00' DOMS /ROBERSO4 0001ROSE 0704 4r4lo.70O70• up ...I 901610715MCR ▪ 303 700,0 4wR4. '501+90[04 P.' SPRMCRODO PMR NEAMER 106 570d00i<ape. Ob. SNOWBERRY 9400 7090 '80.0.7 0072 B0KC5 P107..N0LE ▪ 1265 0[1971JAPA9g50000 SPURL[ it 1 911, cent. to... Mon06, cure .6 (00144 • 1B' 0.0. T,Io *60, pxb9. 1 974. eonl. FW, 104 8,0000.4 006 •0 reale. • 161' 0C. Mm9W0 pec19 t 97. 6001: rW, •.8 600006.4 006 •.8.007.0 • 16. 00. 1/1609470 p001.9. 1 gd. cwt.. fun. No toe -Tabs. 004 0.8 0.0704. 1r1009 *6 •0x99 • IB' 0C. 1 907. 0007. benched 004 •49 1607.0 • 15' 0C. Trbnp*> peckw. 1 gal. 0001.: Fun...8 0,00(74.0 006 .01 100106 • 24' OC. 7.70.970. 000(9. 0• pet. rub and ..0 M0M<4 • 12' OC. 7(7000.90 10x109 4' pot: NM 004 .07 amc0.0 me .w root.. • 15' 0.C. 1,1077.,70* 000090. 73 SoexxcO bed..0o 84001:0 1 9d. cam. FW .06 70x74.0 and SARCOCOCCA own 40.904. 1700.400 px109 • 1a' oc. / 907. cont. •W, .en benched end ..8 1001.0 • 1S 0C. T,bn9ul0 0x:09. 507 80. 000070 'howl( *E11(R0 NEELY O 207p302 5CCOED CARO I6. 9a97L ORASSROAD PARRS F-110617 (00904 IK CONTROL SEED M I 1 .0 H. (ACCESS 00 404 ARG) SEE CATALOG NT SHEET BANK STABILIZATION (UPPER BANK) 14400s.n. 23i C6(010,0.0u. 00770011«0 006000( SZ A6ti<Fnotn NN.. E MAPLE SZ 570*BERRY • 74041 t5[ 541. 1004.bq 000R(RS 08100 156 5740, 0(0/wk . S000/05 9110* SZ TMN0('p0"Ol"v97. ▪ Ruws 0.070611. • S014ON0(RR7 5% R•0. •0090..00 ED 256 .R+t�D 00F o 01TTR7011 0R BARE ROOT PLANT 0ATERIAL DEPENDENT UPON TWE OR 7(46. 01405740 9ETN005 SNOLL BE PER TONG COUNTY SURFACE WATER HANALIENT GUIDELINES TOR BANK 01401120004 P00AC75 RANTS SHALL MTNM90( R[ IILERu16EO FABRIC LAYERS ON RIVER BANK. ALL LOTR BANN RRE0[VE (60904 SHALL SEED 1 BANK STABILIZATION (LONER BANK) 2a2 0 .25[ Rep 601 00. 547. 7400101000 25* BEACH RR100 506 974771 (Pru.) fusee WESTERN CRABAPPLE (UTTN011 OR BARE ROOT PLANT 90E04 DEPENDENT UPON ONE OF 7E417. PLW7070 *0(171(05 SHALL BL PL. RMG 110.NT9 SURFACE MATER I1ANAGNENT 8.1.0(107[5 FOR BMX STABIIRARCN 000)0(75. PLANTS 97ALL BE 447004.0 611(0917C0 W1MN GE01007RE rA9RT LAYERS ON RAR R.N. ALL 100E9 BRAN PLANONG AREAS SHALL 6(0(0E ER09o4 CONTROL SEED. NOTE: L00ER BANK PtAN1NG5 90411 BE LOCATED BETWEEN EDGE OF 4CCES5 BEN01 A140 W,0, REV. (APPROX. (LEV. 7.5) RE CAL OOAMNGS ARC ..9•1 0.0.165 TIN ATOM 0917 •4041. e. MUTR1 x..1,+• 1,9) r4 ▪ c0nA00 .AOK.•1 vM 64• ..pµ [,7. w.nE . Mn fetl 2/05/93 1. KNE 37. 041010 1. re *CLEO ROAN. xn L- 5 IM ROOK paoo PAL / J06606 PATI TERRACE 1�D66I6 PATI SI M:TII IDM AT MDQ IMI% 11�NTII6Y eXPC' / SEE :SHEETS L -I A. L-5 'LT+ LANOSCARIN Cr I Ir•{� /IArcR LEVEL a'ov ROOF K16NT 1Df COM OBMRLM Pb.o. DOTTO.. CP DEA.. tD eIMy1 FLOOR t04 J0661Ie PAT. T-0' NALIC016 / J0661116 PA NATERILVEL oo• ROO K161R IDY COOS OE'MTgW l�.Q. 60770..O• MSS b! -0 J066016 PAIN r 5' IC/ 7d r NO BATT O+'J.L.".itN RIDGE VENT - GLAD HOOD 7100115 STEEL FRAME M/ FUCK VENEER c.ANOPY ROOF. OVt V GOVERt BOARD BOARD TARRED IM.0 ATION VAPOR RETARVER tri.vfr000 SIEAIMNS 64..LAM LLEATH5 mASOTRY COW -NS 14111111 KJTCKN CDOLEI.141TOR SENOR POYDL / NMTN6 errieNce PAVQIO 1 ENTRY CAMPY DROP OPP col1/MTT EVENT AREA SINT®3 AIIMANlNTRYII__II I' 5ICY 20' MAM LODEN. N MPO ENTRY CANOPY _1_1•CJMO1tt0_ _RR LW m ISM — M NIL -a0_ _MRI IO!__ LgCc�IAL 14AL4. WAR L� WT Dgit0PYEAMNO16 OR 6YPSIM 5•EAT IN6 2 • 6 MOOD STIR' R- 1 BATTYPE X618 MSI.L T LOBBY ROOF. p RELOCATED BELL LOBBY HALL. D HOODBARAMING�/.. 1Np6N 6-TPSUI�IV11 BOARD GLAD FOOD MWQY NJAC DUCT LONER BCIJAJCPPVY �ROOpOFF. COVEN BOARD T6 R�� MA501Rf GOLUIK DROP OT FLAG PLAZA POLKAS /.1166016 PAIN / FIRE MGR AGGES 61140.51M 6T74 / RAQEIENL. FOYER RAC ETEALL / SMASH SE CTIIQDN AT GYMNASIUM :TEG SFIECTS L•I 6 f.-5 FOIL LANDSCAPING. IMIFRLEV . r S a 20' CAO. 6YFIM57M ROOF. *4COD Do V5LLA NON APOR RETARDER 5 •1000 OEGCOIS STEEL TRII6SS 4.46441 FIXTURE NVAG DUCT RAOUE CO.RT ROOF. .Ru059X2' _ R161 M TJ'6 COURT CEILING PANELS ROOF PUN ADcaeLLER D SCREEN F� CEDAR FACIA / SOFFIT FETAL !UTTER / D0146POUT COUPE FIRE DOOR COME VOLE. MCA VE/EER 6' LT&AMETSTUY R -N BATT 1NSLLATION .—C/ORT MALL PANEL SYSTEM RETRACTABLE !ILEAC/CRS 1 1 MOIL BllftDING- CROSS SECIIONS- MRR PAs_ r. aIA .00111 11.71551. rlr""1I ux anu4o 000 4401- I,On .,Min 15' 111.• LIVE 01Md ""1" 1'I r t® 3042 ¢ 153. 1(1313 PIACI 5' 0.1..0(11134:. •' COOT au 01715 •1(000 R1¢ 71(x4 Cr 177 los 1(100 sII WOE 11000C 4¢1 11 15001134 00/1TOIL KU TM 1¢101+0 .03500511 r. 71(013: POAI 1:1 sansl4 -•a NRR 1104(1//ffm. 734 TA730 .016(7 01 0) ILO lO7S 3104 1) 111 1340141 R. 3(171-1 70 R5A 21155.1 4475. 10'-IS'+3--I 151 arts: 5. w•o(3 ¢ DIn1117 7KIO. as NO 13101110 MLS 071¢I .5 0001741000320 (171.. 7. I100ALI ti 0.111x7 ¢ 001017 \1011500 ILL MR.34. 3. n t.o13741 Rr 3111(4 (07 ruin IMMIX 1177. Bifinfaela VECETATID DEOOtID NIFA 1 BMR STABIL 17ATIO1 SECTIO• 0001131 Ills 1001 (ID. 7.5 Km 1014 11110/ m 1¢ to A' ■I5. vA 3 11x1 11101 L017;117W- -..... •4(0'(1. 7.0574 anti 1• 0511(1 •m RICE 1111 3'-S 515. 00111 Amb KM 10040 10117 1771711 0, 1111 11015 T --OM Mr. 7.5 1 I/1' Unit 0•�� 10110 0311 1 It' TIM. 11' 000 710. 70'-30. 106 7341 7135 51158 011. IWO 1111 111.R 010 1111040 OEM 5-. I.1 TUR fall MOW AI M TAU Or 7' 0 11' 000000 70307 M AMOCO .OA.' 100.1111[ NMR 10101151 ras 51x7 10. 1 31 1) .071551 6 Ml 1117 Limb 11106101100037 .41 01150106. 3) 767341 70 LOCI 1GO1000 RAND 51.0C 0015.00 AT 73' OC. .034 MOM. 01010105 0103 073 6181 LANE MY CMS DETAIL t� 7) SII 1*4O51741 RAI 3171-31¢1 5747 1110131 161 mE S<CTIOI ARC •••.t ••7.1151 SAAL al R¢-Rlf P sn lm •.m 1m•u •71 50. 50 rams m ow. .•t.t SOR w PIM IT MI 3101911110•••• 150 10151 i 31717 GRADING AND DRAINAGE DETAILS 1341 117 .4 RESTROOM/FITNESS ENTRY RACDUETBALL COURTS WITH CHILLER ABOVE 4FC4A-10-0tiNlec, UPUGI-ITS a cut -i.) HeTAL. HALIDC. LOCKER ROOMS FITNESS WING FITNESS ROOM LOUVERS, PAINTED GAMES DANCE POTTERY/CERAMICS ARTS AND CRAFTS, PRE-SCHOOL/CHILDCARE Se110R COVERED ENTRY HUMAN SERVICES MULTI-PURPOSE WING t=. PRE-SCHOOIJCHILDCARE - IB4CLOSURE WALL \YEW IMIUDA11 MIMING rMlaNO-HDANTeD FLICIRTS e COLUMN; _ OTAL HALIDE) SENIOR ADULTS WING 0 --Pr Gana M MS Pia EXTERIOR— ELEVATIONS— ;grave' r -r 00MP-ft__ 1rh • LOUNGE/MULTI-PURPOSE/DINING AREA SENIOR ADULTS TERRACE SITTING WALL CKick-Raw Loch GXIcI�•RUNMIaG romp STEEL. RAIL - F )H7W 5u -SE TRIM COLOTL i#=:li 111! IIT WILL AT sTeeL II... MAIN LOBBY -TER RAIC . WALL —3/•}".1•-o11 KITCHEN WITH HOOD FAN EXHAUST ABOVE BAmouETmEETING/AEROBICS MULTI-PURPOSE WING • -4 TERRACE SITTING WALL CLASSROOM/ YOUTH MEETING/TRAINING —WALL. HOUNTeb UGNTE /MTL.HALI De. INDIReartGm 5111D MPUAFTi McTAI- HALIDG. . Uilii! IUIlii MAIN LOBBY GROUND- 1,141ANTED - .11PLIGNTs e COLUMNS, METAL HALT De. BRICK - ROWLOCK BRICK - RUINING BOND SITTING HALL DETAIL 3/4' • ILO' I':Iili1111111p1?!pllllllliil!I!Illlilj illllll'IIII";f l clliP 611I1B!'tni 7?�"98Uri TERRACE WALL 6Teet- TLy L- PAINTED e.-ue TRIM COl-O� PATH WATERLINE I • 1 1 OFFICES STAFF LOUNGE BO LER ADMINISTRATION 1• „�12l;I I1 Ii i GYMNASIUM I:. • TYPICAL MATERIALS AND FINISHES METAL ROOF WOOD TRIM, STAINED _METAL GUTTER AND DOWNSPOUT, PAINTED iui —WOOD SHADING TRELLIS. STAINED WOOD BOARD AND BATTEN SIDING, STAINED WOOD CHANNEL DROP SIDING , STAINED VIIII W II?II)©AII li'IIVE R -BRICK VEIEER. SEALED a1.uy WOOD WINDOWS AND DOORS, WITH EXTERIOR ALUMINUM CLADDING OPTIONAL CHILLER LOCATION STORA6E/TOILET5 r r iY -l1•R•t.Wnfl _ _ 1111 W114 llwtt _ _41DL.M _tw tn,m _/man on, m EXTERIOR EiLEVATIONS— ;;{TtETIf =%7 sa; X3;2 /HALL MLVHTEm LIGHTS, HGTAL HALIPG TF ---L 11 Fl n 11 11 -1 HUMAN SERVICES SENIOR/ADULT SERVICES FIRESIDE LOUNGEBBO LOUNGE/MA-TI-PURPOSE/ TERRACE SENIOR ADULTS WING DINING AREA VIID3W IMAM GA11DD3N AND CENI1 AVENUE 4QD1<JTIIII • t GARBAGE/RECYCLING ENCLOSURE BRICK WOOD/STEEL GATES TERRACE GYMNASIUM VIEW NUM 9UJ'IrBNNDR EVENT' AREA a 1 GYMNASIUM STORAGE EXHIBIT ENTRANCE FITTESS ENTRANCE RACQEETBALL GOURTS W/OPAAUE DOOR WITH CHILLER ABOVE FITNESS WING VOW MOH FILAYIl?IIII3LIID6 -.A•��GyWSt�l. — GOOK -- —MT Ls[na lAt9Lw1/Unit -GROUND =a: MOUNTED LIGHTS -OAST METAL LETTERS•CRt1 HCD -- IS'-0� GH isHe riH13H SITE SIGN WITH ADDRESS (AEI IN. 6' FROM PrortR77 LINCs) r 9r • r w pt v E2 V VR EXTERIOR ELEVR11Ot1S— aeo RO(tt R µ1f1A_ fat • lArDDED P.,CP \i -N1" ------ U. I 1 11111 11 1111111111111111 =LA N017_ 1101111111- 1111W111 Er AMY / rb\- Lc 11•5 6TI_J D) 1 1 1 • :ADD IT 10 NAL. .ZOL. DI Pza- 041.41zc-- 1' .5'..10' 20' _' �-►GNB t�11 . -Co f3Rt_DD DD.oj2 S bo'RM�� s,UDJ._ 1' 5' .. - 10' 20' 2•1s-�s- LOUNGE MULTI- PURPOSE 0 SIRNIIOR AND &MEAL W1ING gp r 5 10' arr HUMAN SERVICES SENIOR ADULT/ JAN] .. STORAGE • if . ARTS GRAFTS • POTTERY *-.-CERAMICS -•••• DINING BUILDING FLOOR AREA: GROUND FLOOR. 45560 SF. ME-GHANIGAL MEZZANINE, 2,100 S.F. BUILDING TOTAL 48,260 S.F. WETY▪ PICAL ........... BANQUET MEETING AEROBICS NeD LOBBY CLASSROOM MEETING TRAINING YOUTH marc37 0 1.171. 5 ••• ........ AR _ • _ ••••t ••041(,1 ne IN? r•I - .n.f. — r.mms __P• vast" FIRST FLOOR PtAN-- r FITNESS ENTRANCE TYPIC RESTROOMS RAGE ES IO E - MOM .... ----- 0 IFIITNIISS WIING r *o• 20' m5113LE LOCATION ..;•i ao.o.,<n tett _ "Av. rntx• . 3.,11,1 3?2 1011 Is. • - -• _•- - • 6:4- �.vtS •1, cobun FIRST--- - -- PLAN _ nom le — — ; • MOTE. ,n- 00 SnE, C.O. C.EV. , .40* E.EC .50 0...) 91 D. ...stn. -cif PA.., 2 5,..C5 "'EU To 050 a.CLUOMC 5 S.M.. 91 35 00-0*3 3 510015 000 TCtS C T.M. 5 BE 113 ate.. Inf310.1 annEST DEW. 005,000 TO Aucm 000 GO.ann ' • • ' • - '4 4 .4 4... • E 124- sc. ‚(C21011 ® CONIFER TREE PLANTING DETAIL C 0(800 C1%-.4', 0/ EE -940 2.tf. P..01 01-23.0 STa.E 50f OE amp...an =EC 02 9.0 ti.ao! e . ..E (SCS 1001 0,3 5...a. P.0.5 cr -s- c4:4.. SE •• EmS- • Sn..1 jijoC • ',EEL S-Sa BE 37.- 2 S'05 EP, 'atES up To mCLOMP -3// EM 90011. PE 05 3 5'00E5 E0. P.ECS T - B717 C.L Of 3' 6.51 0,4 15 .5,57.7, 501 0' OPTIOoo ,2- V% / /I „. I a/ 7/3 SC. 551, dr 1..511.5 SC '-•}50c2,... E AATE %ME ;EcTioN (1)DECIDUOUS TREE PLANTING DETAIL 001 To 51....1 )55. 9055 11% GOtOS 541(104,75t5.5705”00't e.t"T- 1.11 73,7 TC)-:Z.r4w — 0E-9.0 ELAN ,-50CP0E T.Le.. 5 a_pe.a ..OSES a TO 00 000. 177, .'aC v.as s•L,F .4.3 S.... e...s 00 CA COI CK,., TO 81 0.0 .) 101 1141.1.7.t \ r100 :1 7 '4:''ECri',ti:—\ T 1fgi' ..7T,-7,,,,, / ''-- 'IS'..5O'..(*a.'9'....10.:..I .5.::CgCE */A ...,..... A r''''....3--. ./-.‹.--...1 = ..s c..c_ 1 i...-7 --: ' - i 17.7'7,:frj, . ••••:_s.._,--: -, - - ' ' ,,....!:-...,..,....... 11.1441,,,:r4..7C're.-P.. , - IC‘-r(.'llta 1-..) / „.. „.........i li::./31.r..,,•. 5.-:, • -.*::402..: /, 1.9' so. 160T100 ''00 ....,.4 411.-,..,.. GROUNDCOVER & SHRUB 0 PLANTING DETAIL 5.7151,517 775.15755 755555117. HOUGH BECK & BAIRD INC. LaNOSCAPE ARC1IIIECTURE P1060000 k 012000 DEs+cn woo k.vor,. 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POLEBASE DETAIL .C1 m.Lr[ OA — I'OC—E LI(�N'r OD — %OLLARD LIC7HT 00 — 6RO:4 NO-MOUNTEI7 UP1-I&HT GRAPIIIC SCALE ARC ••••t mo7Rf • teav Far raw 11a▪ 111111111 •••11•1m1_ a^_ IRO Oa ELECTRICAL SITE PLAN aO 0• . p•R Woe .CI [.0 70 ..01(L1 NI 710 fat ES RECEIVED FEB 1 ©1995 CUMMUNI TY Epic File No. 04 •• 6161 DEVELOPMENT Fee $225.00 Receipt No. °- jZ� V I s>=_D -- ENVIRONMENTAL CHECKLIST Control No. A. BACKGROUND 1. Name of proposed project, if applicable: Tukwila Community Center 2. Name of applicant: City of Tukwila 3. Address and phone number of applicant and contact person: 6300 Sout:hcenter Blvd., Suite 100, Tukwila, WA 98188; 433 -0179; Randy Berg (1644) p , 4. Date checklist prepared: 11/28/94 ctiti G/ 2 /c1 MG 5 5. Agency requesting checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): Phase I- Building construction, ?arking improvements, Duwamish River bank stabilzation and limited landscaping are planned to begin in Spring of 1995 and be completed by Spring of 1996. Phase II- The remaining park improvements are planned to be under construction in 1997. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A shoreline stabilization study has been completed to determine the best way to treat the Duwamish River shoreline. A Traffic Impact Analysis has been completed to determine appropriate traffic impact mitigations and offsite improvements. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. YAW Cityi ,Taff ;T.ukwil oWCohditIvinNUdisikTeimit,i an'd 'Board rofgArch tebturalo Review, Approval -2- 10. List any government approvals or permits that will be needed for your proposal. U.S. Army Corps of Engineers permit for work on the shoreline and storm water discharge; Hydraulic Project Approval from Washington State Dept. of Fisheries; Shoreline Substantial Development Permit; conditional Use Permit; Architectural Review; Building, Mechanical, and Electrical Construction permits. Flood :Control .'Zone :Permii 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. Section E requires a complete description of the objectives and alternates of your proposal and should not be summarized here. The Tukwila Community Center project is planned as a 48 °,.000. : :sq. ft. multi- purpose recreation facility with a gymnasium, fitness, racquet ball, dance, and multipurpose meeting spaces. The completed project will include recreation staff offices, and a senior adult activity center. Exterior improvements will include parking forf1327'cars, athletic fields and picnic and other passive recreation improvements. Included in the site improvements will be the required stabilization of the Duwamish River Bank fronting on the subject site. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The Subject Site is a 12.8 acres located on the bank of the Duwamish River. The Site is bounded by 42nd Avenue South, and South 124th Street, located within the South East corner of Section 10 -23 -4. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Yes- The Duwamish River shoreline is designated as a sensitive area. B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Plat, rolling, hilly, steep slopes, mountainous, other The Site is essentially flat, except for the steep banks of the river. b. What is the steepest slope on the site (approximate percent slope)? 40% to 70% at the river. -3- c. What general types of soils are found on the cite (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. Soils on the site come from a iariety of river sediments, and include sands, silts and gravels, and are classified as Puyallup Series. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. e. Yes, there is some evidence of recent erosion and sloughing at the river bank. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. The proposed river bank stabilization work will require removal of approximately 119,000; %cubic`'` ;yards oon ;f. mater .a1 r from Y the, bank, which will be, .: reused -' the` site f., Could erosion occur as a result of clearing, construction, or use? If so, generally describe. g. Yes- Construction Activities will result in removal of vegetation on the site, making it vulnerable to surface erosion. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 30% of the project site will be covered with impervious surfaces. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Specifications and drawings for construction of all project elements will reflect the provisions of the Land - Altering Ordinance and the King County Surface Water Design Manual for erosion control measures during construction as well as the permanent erosion control measures included in the river bank stabilization plan. 2. Air a. What types of emissions to the air would result from the proposal (i.e., dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction exhausts and dusts t'ill be generated during the construction of the project. -4- b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. c. No Proposed measures to reduce or control emissions or other impacts to air, if any: The construction site will be watered as required during dry weather to minimize the generation of dust. 3. Water a. Surface: 1) Is them any surface water body on or in the immediate vicinity of the site (including year -round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. The Site is bounded to the South by the Duwamish River. 2) Will the project require any work over, in, on, or adjacent to (within 200 feet) of the described waters? If yes, please describe and attach available plans. Yes, the 48,000 aq. ft. Community Center and various park improvements are planned within 200 feet of the river. Some recontouring and stabilization of the river bank is also planned. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Some material will be removed from the river bank to provide more stable contours and to provide maintenance access to the river bank. The total amount of material removed will be approximately 9?000 .`cubic yards. 4) Will the proposal requir4 surface water withdrawals or diversions: Give general description, purpose, and approximate quantities, if known. No -5- 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. Yes, a portion of the river bank including trail, .and;,river bank'-. improvements,; _ i"s� i.within V. # €he 100 year floodplain, liowe'v`'er no" buildings or permanent improvements are planned in this area. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities, if known. `No 2) Describe waste materials that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.) Describe the general size of the system, the number of such systems, the number of horses to be served (if applicable), or the IlLmber of animals or humans the system(s) are expected to serve. None c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Storm water runoff from improved impervious surfaces will be collected, treated with a wet vault, coalescing .plate oil -water separator and bio- filtration Swale and discharged to the Duwamish River. 2) Could waste materials enter ground or surface waters? If so, generally describe. Yes. Any major construction project presents some risk of this type of impact. However, construction timing and strict controls during construction are observed to prevent such occurrences. -6- d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: Storm water will be treated as described in answer 4 -c -1, above. Erosion control methods will be employed during construction to minimze risks of runoff and erosion impacts during construction. 4. Plants a. Check or circle types of vegetation found on the site: x deciduous tree: Calder,- =maple, aspen, other evergreen tree: fir, cedar, pine, other x shriibs7 x g.asa- x Cpasture crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eel Irass, millfoil, other ether types of vegetation b. What kind and amount of vegetation will be removed or altered? Nearly all of the existing on site vegetation will be removed and the site will be totally relandscaped. River bank vegetation will be left undisturbed except where the river bank is recontoured or armored against erosion. c. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The Subject Site will be entirely relandscaped with irrigated lawns and planting beds and will include perimeter trees and screening trees at the parking areas. The river bank will be relandscaped using native riparian species. -7- 5. Animals a. Circle any birds of animals which have been observed on or near the site or are known to be on or near the site: x birds: hawk, — heron, songbird )other: x mammals: beavers, raccoons, squirrels, small c rodents _ _..... ------ x fish: trout, Ccoho salmo and perhaps Home freshwater mussels in watercourses b. List any threatened or endangered species known to be on or near the site. None known. c. Is the site part of a migration route? If so, explain. Yes, the annual salmon migration up the Duwamish River will pass the Subject Site. d. Proposed measures to preserve or enhance wildlife, if any: Proposed development of the Subject Site as a park will preserve open space for habitat. Treatment of the River bank will be aimed at enhancing the aquatic and riparian habitats. 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Completed recreation facilities and buildings will utilize electricity for heating, cooling and lighting. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. c. No What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Buildings design will incorporate energy conservation alternatives. Where possible, recycled materials will be utilized for construction of improvements. Energy efficient heating, cooling and lighting will be utilized. 7. Environmental Health a. -8- Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. No 1) Describe special emergency services that might be required. Only routine fire, police, and first- aid/ambulance capacities. 2) Proposed measures to reduce or control environmental health hazards, if any: Limited work hours will be observed (daytime) to mitigate noise disturbance to local residences. WISHA and OSHA standards will be observed to protect workers during construction. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? 2 )' Truck and other traffic noise exist at the site. Air traffic to and from Boeing field can be heard at the Site. What types and levels of noise would be created by or associated with the project on a short -term or long -term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Construction noise will occur on a short - term basis (restricted to daytime hours). In addition some noise can be expected from spectators and participants at the proposed recreation facilities. 3) Proposed measures to reduce or control noise impacts, if any: Construction will be restricted to daytime hours. Outdoor recreation facilities will include buffer areas to screen excessive noise, and will be scheduled for use during daylight and early evening hours. 8. Land and Shoreline Use a. -8- What is the current use of the site and adjacent properties? The majority of the Subject Site is c>rrently vacant, with a portion of the site used as a community garden with parking and a small restroom structure. Adjacent properties are residential (east) and commercial (south). b. Has the site been used for agriculture? If so, describe. Yes the site has traditionally been used as pasture land but has not been so used for many years. A portion of the site has more recently been used as a community garden (pea - patch). c. Describe any structures on the site. A 150 sq. ft. restroom building is currently on the site. d. Will any structures be demolished? If so, what? Yes, the existing restroom building will be demolished as part of this project. e. What is the current zoning classification of the site? R -1, 7200 f. What is the current comprehensive plan designation of the site? g- Parks and Open Space. If applicable, what is the current shoreline master program designation of the site? Urban h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Yes, the shoreline of the Duwamish River is currently designated as- environmentally sensitive. i. Approximately how many people would reside or work in the completed project? About 15 people will work at the new facility. J. Approximately how many people would the completed project displace? None -9- k. Proposed measures to avoid or reduce displacement impacts, if any: Not applicable 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: None. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low - income housing? None b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low - income housing. None c. Proposed measures to reduce or control housing impacts, if any: None 10. Aesthetics a. What is the tallest height cf any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The proposed height of the gymnasium and building entrance are now 42 feet. This requires a Variance (approved). Exterior building materials include wood, brick and metal roofing. b. What views in the immediate vicinity would be altered or obstructed? None c. Proposed measures to reduce or control aesthetic impacts, if any: Specific design goals include creating a facility and park which will serve as a sense of pride to the community. The Project will be subject to the requirements of Architectural Review. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Some off -site spread of light from parking area lights and future athletic field lighting is possible during evening hours. -10- b. Could light or glare from the finished project be a safety hazard or interfere with views? No c. What existing off -site sources of light or glare may affect your proposal? None d. Proposed measures to reduce or control light and glare impacts, if any: Parking lot lighting and athletic field lighting will be placed and shielded to minimize light spread. Athletic events will be scheduled to avoid late night uses. Parking lot lights will be put on a timer to avoid late night glare when the facility is closed. 12. Recreation a. What designed and informal recreational opportunities are in the immediate vicinity? The Allentown Park about 1/2 mile to the north offers a multi -use athletic field and picnicking. The Duwamish River offers boating, fishing and jogging opportunities. b. Would the proposed project displace any existing recreational uses? If so, describe. c. Yes, the existing Allentown pea -patch will be relocated to the Codiga Farm about 1 mile to the east of the subject site. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: The project will include baseball and soccer fields, basketball and tennis facilities, children's play equipment, picnicking, trails and other outdoor recreation facilities. The building will include a gymnasium, racquetball, game room, dance and fitness space, as well as meeting and an adult senior activity center. 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. The Subject Site qualifies to be listed as an archaeologically significant site because of the presence of Indian camp remains. �-. - atott br °f r yes a42 re- nwm6f4) b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. No surface landmarks indicate archaeologic importance, but a subsurface survey of the site has resulted in a dilineated area of the site determined to be of archaeological significance. Lithic tools, fire modified rocks and evidence of food processing on the site date back nearly 2 centuries. c. Proposed measures to reduce or control impacts, if any: An Archaeologist has been included in the project team. The design has deliberately avoided disturbance of the area declared significant. Soils in this area will not be disturbed below the plow zone (about 12 inches). This avoidance will preserve the subsurface archaeology for future investigation. 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The Subject Site is currently served off South 124th Street, and 42nd Avenue South. Future Site access is planned from both,.,of.,.these,s -streets,. >,,r Trees, at,the driveways are;°not to;fob'struct psi driverr distancee �Thev Tucwilah C`ommuntty Centers project willx,pay proportionate spate so'f ti42nd' Ave .:;.: s...;;and S .124th'�.St `':intersect iniW:mprovements .-and street ght ng ,to provide 2xsafet r and a is ty for xr�rA�ysFi 12+1 Jk 7 T. >YJlrf �3,.L4 V +'��+#. +� +nrc the. riew vehicle and pedestrian tr"arT o �Tbd' . 2na 124th �St. design repo ' "1614 daetesmir is N +improvement inclu i Ong 1 ETC t rr� -A �'+ Y 4a, y^3/ i �3F4 xf g her' ...7c:. 1 iir ? tranportatio# ,,.f, 4 impact Yanaglyeia r `� �trecomm nd rfm ti gat ons+ incl d'ing,� eignalization and4idwalk b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? c. Yes, A Metro route passes the site on 42nd. How many parking spaces would the completed project have? How many would the project eliminate? The site improvements will include qv parking stalls. Currently the Site has 15 stalls which will be removed. -13- d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). e. The proposed improvements will include frontage improvements to 42nd Avenue South, and to South 124th Street. These improvements will include curb, gutter, sidewalks and lighting. An appropriate contribution to a future signal at the intersection of 124th and 42nd will also be included. For background_t; information = .!:please;;•;: refer to the' 1Transportation:Impact Analysis4for;. Tukw�.la Community Center' "'. "'report -'dated .Novembers 199`5`: ' ` Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. The adjacent Duwamish River is considered a navigable waterway. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. Approximately 1940 trips per day will be generated, 115 peak trips per hour @ 6:OOpm. It should be pointed out that the proposed Community Center will replace the exisiting Community Center which now generates about 500 trips per day. g- Proposed measures to reduce or control transportation impacts, if any: The scheduling of activities at the proposed Community Center will seek to avoid large multiple events. 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. As with any development, police and fire protection will increase as a result of the .:onstruction of the Community Center. b. Proposed measures to reduce or control direct impacts on public services, if any. None. 16 Utilities a. Circ o_.uti sties currently avai,iable _at...the_s'te: ectric4 , natural_gas, ater use servic ephon anitary sewer, septic system, - other. -14- b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. City Light will provide electric service, Metro . will provide sewer service, The City of Tukwila will provide water to the site. c. Signature The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Date Submitted: PLEASE CONTINUE TO THE NEXT PAGE. -15- TO BE COMPLETED BY APPLICANT D. SUPPLEMENTAL SHEET FOR NON - PROJECT ACTIONS Because these questions are very general, it may be helpful to read them in conjunction with the list of the elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage,or release of toxic or hazardous substances; or production of noise? Increased impervious surfaces will likely generate increased surface water runoff to the Duwamish River. Increased vehicular traffic flows will likely increase emissions. There is likely to be no impact from improvements planned in this document in terms of toxic substances or noise. Proposed measures to avoid or reduce such increases are: Use of swales and storm water collection and treatment facilities will aid in dealing with runoff. AIncreased {rr ve ,. storages,; amdU:onsiter;rdetention LLof.ti ruhoff;!�offset added ,peaky flows in'the; Duwamish *; Increased traffic is l`be` partially offset- by`clo'sing` the existing Tukwila Community Center, which currently operates many of the programs planned for the new center. In addition road improvements and contribution to a future traffic light at 124th and 42nd will aid in the smooth flow of traffic around the subject site. 2. How would the proposal be likely to affect plants, animals, fish, or marine life? The site vegetation will be largely removed and replaced with new lawn areas and planting beds. No significant effect to wildlife is foreseen as a result of this project. Proposed measures to protect or conserve plants, animals, fish, or marine life are: River improvements include habitat enhancement and river bank stabilization, which should benefit the aquatic and riparian habitats. 3. How would the proposal be likely to deplete energy or natural resources? The proposed center will use electricity and increased vehicular trips may increase fossil fuel consumption, but the affect on depletion will be negligible. Evaluation for Agency Use Only -16- Proposed measures to protect or conserve energy and natural resources are: Conservation practices will be incorporated into building and heating /cooling system design. 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlands, floodplains, or prime farmlands? Work on the river bank will result in a more stable soils condition and reduced erosion. The designated historically significant area will be protected from subsurface damage, and saved for study by future generations. Proposed measures to protect such resources or to avoid or reduce impacts are: See the answer above. 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? The project will leave about 70% of the site as open space. In addition the shoreline improvements will preserve the shoreline while increasing public access and recreational opportunity. Proposed measures to avoid or reduce shoreline and land use impacts are: See the answer above. How does the proposal conform to the Tukwila Shoreline Master Plan? This proposal is consistent with existing plan. 6. How would the proposal be likely to increase demands on transportation or public services and utilities? This proposal will increase deman•is through the construction of the new Community Center. Proposed measurer to reduce or respond to such demand(s) are: The proposed Community Center is being constructed to meet some of the demands for public services. The Center when completed will meet recreational and meeting needs of the community. Careful scheduling of events to avoid rush hour and peak use traffic generation will help to minimize traffic impacts. X17 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. This proposal will not conflict with laws at any level. 8. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? If so, what policies of the Plan? No Proposed measures to avoid or reduce the conflict(s) are: Internal review of design proposals by City Officials, Architectural Review by the Architectural Review Board and other required reviews should insure compliance and resolve conflicts. TO BE COMPLETED BY APPLICANT E. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful ti.n reviewing the previous items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the context of the environmental information provided and the submitted plans, documents, supportive information, studies, etc. 1. What are the objectives of the proposal? Provide increased recreational opportunity to Tukwila citizens. Provide a facility to meet the community's needs for meeting and banquet space. Provide a senior adult activity center to serve the seniors of Tukwila. Provide a Community Center which will serve as a sense of pride in the Tukwila community. 2. What are the alternative means of accomplishing these objectives? Update and expand the existing Tukwila Community Center. 3. Please compare the alternative means and indicate the preferred course of action: The existing Tukwila Community Center is an old building in a poor location. The costs of expanding and updating the existing building to meet current needs is more expensive than new construction, and will not address the issue of poor location. 4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? No Proposed measures to avoid or reduce the conflict(s) 74oa0 Evaluation for Agency Use Only MUCKLESHOOT INDIAN TRIBE FISHERIES DEPARTMENT Mr. Steve Lancaster Department of Community Development Planning Division City of Tukwila 6300 Southcenter Boulevard, Suite 100 Tukwila, Washington 98188 RE - 5 March 1995 mAR RV— Cu . DEVELd , ,v 0010...C31" RE: MITIGATED DETERMINATION OF NON - SIGNIFICANCE TO CONSTRUCT A COMMUNITY RECREATION CENTER ADJACENT TO THE DUWAMISH RIVER (WRIA 09.0001) AT RM 8 Ref: Muckleshoot letter dated 23 January 1995 Dear Mr. Lancaster: The Fisheries Department of the Muckleshoot Indian Tribe has reviewed the Mitigated Determination of Non - Significance for the Community Center and the associated 480 linear feet of bank stabilization. We remain concerned that the City of Tukwila may have underestimated the areal extent of the adjacent Native American cultural site. Furthermore, unless the proposed mitigation measures are actually implemented, unmitigated site specific and cumulative adverse impacts will occur to salmonid habitat. Walter Pacheco, Community Services Coordinator for the Muckleshoot Indian Tribe Community Services Department, should be contacted by the City of Tukwila for comments pertaining to the impacts of this proposal upon Native American archaeological sites and artifacts. To improve salmonid habitat, the City of Tukwila has indicated that the river bank will be cut back and bank irregularities will be created to improve salmonid rearing and holding habitat. Large woody debris might also be placed into the river. Despite requests by the Tribal Fisheries Department for information concerning the amount of large woody debris to be placed as part of the project , the City of Tukwila has yet to commit in writing to a number, though in conversation has suggested potentially 20 pieces. However, the MDNS states the river bank habitat work will require the approval of the Green River Flood Control Zone District. If this District objects to the incorporation of large woody debris into the riRE yE f V E D components of the habitat mitigation plan will not occur. If the large woody debris is not 0R COMMUNITY 39015 172nd Avenue S.E. • Auburn, Washington 98092 • (206) 931 -0652 • FAX (206) 931-- 0752�'DP ENT placed into the river, this project will have unmitigated site specific and cumulative adverse impacts upon salmonids. The project is on the north and east side of the Duwamish River, hence the benefits of any shading created by the proposed riparian plantings is limited. The City should consider off site mitigation on southwest river banks. Any riparian planting of trees on the south or western side of the river would produce a shadow over portions of the river. This project is the fourth bank stabilization project recently proposed within the City of Tukwila. If the City of Tukwila has a long term bank stabilization plan to address erosion and flooding concerns, the Tribal Environmental Division would like to receive a copy of the plan. Though, the impacts of constructing the community center proper are not likely to be significant, pending further review of potential impacts upon archeological resources, the bank stabilization project by itself and in concert with proposed or anticipated bank stabilization projects has the potential to generate significant site specific and cumulative adverse impacts upon adult and juvenile salmonids. Such impacts should be considered collectively, not individually. The Tribal Fisheries Department requests to be a party of record for all decisions regarding this proposal. The statements in this letter are based upon the information currently available to the Tribal Fisheries Department and were developed to protect salmonid habitat. The Community Services Department of the Muckleshoot Indian Tribe is still analyzing the proposal for potential adverse impacts to cultural resources. The information generated during the review may alter the position taken by the Tribal Fisheries Department regarding the nature of the proposed bank stabilization work. I thank you for your attention to our concerns. If you have any questions regarding this letter call me at 931 -0652 extension 119. %� Sincerely, -. CTS% Roderick Malcom Habitat Biologist cc: MIT / Walter Pacheco US Army Corps of Engineers Regulatory Branch WDFW / Phil Schneider King County SWM / Andy Levesque City of Tukwila / Randy Berg STATE OF WASHINGTON DEPARTMENT OF COMMUNITY, TRADE AND ECONOMIC DEVELOPMENT OFFICE OF ARCHAEOLOGY AND HISTORIC PRESERVATION 111 21st Avenue S.W. • P.O. Box 48343 • Olympia, Washington 98504 -8343 • (206) 753 -4011 • SCAN 234 -4011 March 2, 1995 Mr. Steve Lancaster City of Tukwila 6300 Southcenter Boulevard Tukwila, WA 98188 Dear Mr. Lancaster: Thank you for the opportunity to comment upon the Mitigated Determination of Nonsignificance for the proposed Tukwila Community Center. We would like to commend you on your efforts to identify and protect the significant archaeological materials on the property by designing the Community Center to avoid impacting the site. We are very supportive of your efforts to protect the site in place. We would offer the following comments for your consideration as your project plans develop. First, we note from the MDNS that an archaeologist has been included in the project team. We are supportive of this approach and we believe it is important to assure that the archaeologists are involved during the actual construction stages to assure that the site is avoided during all construction activities. Second, we would also suggest that the archaeologist develop a monitoring, discovery and treatment plan in the event that archaeological materials are discovered during any of the constructional phases. It has been our experience that even in the most thorough of surface and near surface surveys, significant archaeological materials may be discovered. Given the archaeological sensitivity of the area, a prudent course of action is to plan for potential discoveries. RECEIVED MAR 0 R 1995 cOMMuN1, DEVELOPMENT Mr. Steve Lancaster March 2, 1995 Page Two Third, the archaeological site at the proposed community center offers a distinct and unique educational opportunity to educate the public about the depth of the City's history. We would suggest this archaeological site offers the opportunity to • work with the tribe in developing a long term management and educational program. Thank you for the opportunity to comment and please feel free to contact me should you have any questions. RGW \mlb cc: Walter Pacheo Sincerely, Robert G. Whitlam, Ph.D. State Archaeologist City of Tukwila 6200 Southcenter Boulevard • Tukwila, Washington 98188 John W Rants, Mayor February 2, 1995 Dr. Robert G. Whitlam State Archaeologist State Office of Archaeology and Historic Preservation 111 21st Avenue Southwest Olympia, WA 98504 -8343 Subject: City of Tukwila Construction of Community Center at Allentown Property, Tukwila, Washington Dear Dr. Whitlam: In the fall of 1993, the City of Tukwila contracted with Historical Research Associate Inc., to conduct a subsurface cultural resources survey of the City's Allentown propel, where_.we propose to begin construction of a community center in the next few months. We arranged -for this survey because archaeological site 45KI431 is located on a portion of the property. Larson Anthropological Archaeological Services (LAAS) discovered this archaeological site during work for the METRO Alki Transfer /CSO Facilities project, determined that it is eligible for listing in the National Register of Historic Places, and conducted data recovery excavations to mitigate- adverse effects of the METRO sewer line .project on the site. The City arranged for HRA's work on the property to determine . that additional archaeological deposits did not occur outside the boundary of site 45KI431. The enclosed report presents the results of HRA's subsurface survey. The City has retained HRA to view construction plans and assist us in consulting with your office to avoid disturbance to site 45KI431. Through an inadvertent oversight, the City did not forward HRA's report for your review at the time it was completed. At present, the City needs to file a SEPA Environmental for the project, and we must have your review of the enclosed re n nt on Wednesday, February 8, 1995. 71995 COfvMMUN; Y DEVELOPMENT Phone: (206) 4331800. • City Hall Fax (206) 433 -1833 • 07./07/1995 11:34 360 -586 -0250 Dr. Robert G. Whitlam State Archaeologist February 2, 1995 Page 2 OAHP: WASHINGTON PAGE 02 We very much regret requesting your review on short notice and have included a signature block to facilitate your response. Could you please contact me as soon as possible if you cannot fax this letter back to me by noon on the 8th. Thank you very much for assisting the City of Tukwila. If you have any questions or need additional information, please contact me or Gail Thompson at HRA. Sincerely, ,9 Don Williams, Director Parks and Recreation Department DW /dc Enclosure: Copy of Survey Report OAHP Cover Sheet Concurrence by State Office of Archaeology and Historic Preservation The above report meets generally accepted professional standards. The State Office of Archaeology and Historic Preservation concurs with the conclusion that construction on the property outside the boundary 'of archaeological site 45KI431'should have no effect on significant cultural resources. 2/ C) Date Whidun - 2/2/95 Robert G. Whitlam, Ph.D. State Archaeologist EC.EIVED FEB.y� 0 7 '1995 • CUiVliviUlvi i'Y DEVELOPMENT n7 rv.. ac -/.7 Author: Title: Date: CC,.mral Resources Survey Cover , .eet KLis Wilhelmsen,Historical Research Associates, Inc. Results of Sub - Surface Survey at the Allentown Pea Patch Property, Tukwila, Washington November 17, 1993 County: King Section: IQ Township: 2. Range: 4 E/W Quad: Des Moines Total Pages: 19 Acres: ca. 2 acres OAHP Site/Field # 45K1431 (Attached additional sheets as necessary) This report: x x (For Author's review) Describes the objectives & methods. Summarizes the result of the survey. Reports where the survey records and data are stored. Has a Research Design that: Details survey objectives Details specific methods Details expected results Details area surveyed. Details how results will be fed back into the planning process. OAHP Use Only NADB Document No: OAHP Log No: My review results in the opinion this survey report does with the Secretary of the Interior's Standards for Identification. Signed Date • does not conform RECEIVED ®7 '1,995 cuiviiviUNi FY DEVELOPMENT 01 /2S /95 19:06 VAX zu6 9 "' U•ioz AIUUKLESLWUT FISH MUCKLESHOOT INDIAN TRIBE FISHERIES DEPARTMENT Ms Ann Siegenthaler Department of Community Development ,Planning Division City of Tukwila 6300 Southcenter Boulevard, Suite 100 Tukwila, Washington 98188 (JUU1 23 January 1995 RECEIVED J41 2 1995 CUIvI,�i�;•.; , r DEVELOPMENT RE: NOTICE OF APPLICATION FOR A SHORELINE MANAGEMENT SUBSTANTXAL_DEVELOPMENT PERMIT (L94-0105) TO STABILIZE 1,000 FEET OF THE DUWAMISH RIVER (WRIA 09.0001) AT RM 8 Dear Ms Siegenthaler: The Environmental Division of the Muckleshoot Indian Tribe has reviewed the notice of application for a shoreline substantial development permit to stabilize approximately 1,000 feet of the Duwamish River and construct a community recreation center. We are concerned that the City of Tukwila may have underestimated the areal extent of the adjacent Native American cultural site. Walter Pacheco, Community Services Coordinator for the Muckleshoot Indian Tribe Community Services Department should be contacted by the City of Tukwila for comments pertaining to the impacts of this proposal upon Native American archaeological sites and artifacts. The remainder of this letter will discuss the environmental impacts of the proposal, impacts which in many instances can be reduced by changes in the site plan. This project is the fourth bank stabilization project recently proposed within the City of Tukwila. If the City of Tukwila has a long term bank stabilization plan to address erosion and flooding concerns, the Tribal Environmental Division would like to receive a copy of the plan. Though, the impacts of constructing the community center proper are not likely to be significant, pending further review of potential impacts upon archeological resources, the bank stabilization project by itself and in concert with proposed or anticipated bank stabilization projects have the potential to generate significant site specific and cumulative adverse impacts upon adult and juvenile salmonids. The onsite erosion and sloughing creates habitat for both adult and juvenile salmonids. Typically, bank stabilization actions reduce the value of the existing habitat and foreclose the creation of new habitat. Though, this project will attempt to create an 39015 172nd Avenue S.E. • Auburn, Washington 98092 • (206) 931 -0652 • FAX (206) 931 -0752 01 /Z3/913 1I:U'( 1e,A ZUU b'! 0/04 iluL,61,:bilUU'1' FISki irregular shoreline to mimic some of the aspects of a natural shoreline, the long term • success of such a project is unknown. Furthermore, if active erosion is occurring at the site, the City is proposing to place improvements within the probable migration path of the river. Thus, as the river moves and the proposed bank stabilization is worn away, ongoing repair work will probably eventually turn the irregular bank into the straightened rip rapped bank typical of the lower reaches of the Green /Duwamish River. Given that much of the proposal is within 100 feet of the river, often less than one hundred feet, a long term reduction.in the amount of large woody debris recruited into the river bank to provide salmonid habitat is probable. As due to the cumulative actions of bank stabilization and land use practices, this section of the river is short of large woody debris of effective size, long term impacts that are both probable and significant are expected. Such long term impacts must be mitigated over the life time of the project. The closer the improved areas come to the river bank, the greater the impacts. To reduce long term foreclosure of large woody debris recruitment and provide the greatest possible period of time before the river migrates into a position threatening site improvements we suggest placing the trail behind the proposed buildings and play areas. This would increase the distance the river must migrate before threatening the proposal with subsequent calls for further bank stabilization work. The project is on the north and east side of the Duwamish River, hence the benefits of any shading created by the riparian plantings will be limited. The City should consider off site mitigation on southwest river banks. Any riparian planting of trees on this side would produce a shadow over portions of the river. The application for the shoreline permit should specify the number of pieces of large woody debris to be installed, the spacing between large woody debris, and the number and nature of the bank irregularities to be created. Without such information, it is difficult to determine if the proposed mitigation measures will compensate for the probable short term and long term significant impacts of this proposal. The application for permit calls for approximately 1,000 feet of stabilization, while conversations with City staff indicate the actual amount stabilized will be less. The permit narrative should specifically state the length of bank to be stabilized or to be benched for this project. This permit should not be written in such a manner that future bank stabilization work is included as part of the instant application. To maintain acceptable salmonid habitat for the greatest possible period of time, the City of Tukwila should be willing to accept bank erosion so long as the erosion does not jeopardize buildings. Furthermore, bank work for repair or maintenance must ' incorporate large woody debris and maintain the irregular shoreline. The Tribal Environmental Division requests to be a party of record for all decisions regarding this shoreline permit application and receive a copy of the shoreline permit, if said permit is issued. LJUU4 • 01/4�/U0 • 1J:Ub 1't►A.auu b'' U(UG U1 U V 1►ld1 W1U U'l 1' 1 D11 I thank you for your attention to our concerns. If you have any questions regarding this letter call me at 931 -0652 extension 119. incerely /,%f Roderick Malcom Habitat Biologist . cc: MIT / Walter Pacheco US Army Corps of Engineers Regulatory Branch WDFW / Phil Schneider King County SWM / Andy Levesque City of Tukwila / Randy Berg UU.J TO: City of Tukwila 6200 Southcenter Boulevard • Tukwila, Washington 98188 John W. Rants, Mayor MEMORANDR e.' i<11/1,/ `YR./ 474fr,), Ross Earnst, Public Works Director Ted Freemire, Superintendent of Division I Paul Surek, Park Crew Chief Rick Beeler, Dept. of Community Development Director FROM: Don Williams, Parks and Recreation Director DATE: November 24,1993 SUBJECT: Allentown Pea Patch Site - Historic Cultural Remains As part of the required preliminary work for the forth coming. Metro Sewer Project crossing this site, it was necessary to perform test digs to examine this area for possible historic cultural findings. In addition to the Metro research work on the west end of the site, I have had a firm test dig the remainder of the 12 acre site. On the attached map you will notice a cucumber - shaped area in the southwest corner. Within this area researchers have found firestone, charcoal, shells and other minor cultural items. Because of these findings the outlined area is now "...eligible for nomination to the National Register of Historic Places ". Even though we have not filed to register the site, the federal and state regulations provide protection to the identified area. Effective immediately no one is authorized .to dig, drill, auger or otherwise disturb the soils of this identified area. In areas outside of the odd shaped area, no soils should be disturbed greater than a 10 inch depth. The location of the protected area is based on a grid system of lines developed by archaeologists. Use the attached map to help locate, in a general way, the protected area. If you have a question, ask before you dig. Better yet, don't plan to dig at all. Phone: (206) 433 -1800 • City Hall Fax (206) 433-1833 November 24, 1993 Page Two Also, no new material should be deposited or stored on this site except for the following: leaves, grass clippings, wood chips and "clean" street sweepings. No other materials are allowed to be disposed of on this site. Because this location will be the future site of the new community center no dumping of any materials will be allowed on this site after next summer. Alternative sites should be developed by each division. We will not use center construction funds to remove dirt, sweepings or other material from this site. Each division will have to pay for material removal. We will use the top soil that PW and P &R have produced on the site and in other City locations. Our goal is to have all material removed from this site by summertime. Lastly, early in 1994 Metro will have consultants on site to perform additional research work. Please direct any questions about this work to my office. Thank you for your cooperation in this matter. peapchmm 11/24/93 124th Street 0 P'' HRA: J� . 50 x 50 cm. Shovel Test Units 0 • 4 Inch Auger Probes ylnos anuany -B9t N 80 METERS • 0 Datum (0.0N/0.0E) Structures Fence Line LAAS: o 50 x 50 cm. Shovel Test Units C3 1 x 1 Meter Test Units Estimated Boundaries of 45K1431: High Density Low Density Figure 1. Map of Project Area. 8G r MEMORANDUM • TO: Don Williams L)• FROM: Randy Berg DATE: October 31, 1994 RE: Synopsis of Friday Meetins on TCC Shoreline Issues A meeting was held on October 28th to discuss the TCC development as it relates to the Duwamish River bank. In attendance were Phil Fraser, Gary Schultz, Andy Levesque of King County Surface Water, Phil Schneider of Wash. State Dept. of Fisheries and Wildlife, Fred Beck of Hough Beck and Baird, Catherine Rosa and Ron Leimkuhler of KPFF. Phil Schneider of Fisheries recommended that we have a 100 foot setback from the river, and that this 100 foot zone be devoted to habitat enhancement with limited intrusion by people. He would prefer a 200 foot habitat corridor, but acknowledges that the 40 foot setback required by local code is the governing regulation. Andy Levesque of King County Surface Water pointed out that the County Sensitive Areas Ordinance also requires a 100 foot setback. He also acknowledges that the 40 foot setback required by the City is the actual development requirement on this project. Phil Fraser pointed out that the City plans to stabilize the river bank, and that the stabilized bank will be maintained by the County. Andy responded that the County will maintain the River Bank if the improvements are constructed to King County Standards. King County standards require that the slope of the river bank be eased back to a 2 tol slope beginning at the toe of the slope (river bottom). Since it is 25 vertical feet from the top to the toe of the bank the County will need access at mid bank. Andy recommended an 18 foot wide bench between the ordinary high water and the 100 year flood elevation, built heavy enough to support construction machinery. The County will also require a maintenance easement extending 30 feet landward from the top of the bank. Taken all together the County requirements will mean an extensive "no build" Zone. The 2 to 1 slope will move the crown of the hill back about 25 feet. Adding the 18 foot bench, and the 30 foot easement will push us about 75 feet from the river. The existing design will place the building within 60 feet of the river, not to mention the retaining wall for the patio overlook, the proposed picnic shelter and the retaining wall proposed for the senior garden area. If we are to design for the 75 foot no build zone, we will have to start from scratch. The bank stabilization will be beneficial to the fish habitat by eliminated the siltation caused by the slumping bank. The toe of the slope will be rebuilt using raw logs with root balls. Some large rock may also be used. This will create areas for aquatic habitat. The bank will be planted with willow and dogwood facines to provide shading t yhgt C ,'vED and to hold the bank in place. A wildlife corridor will be created along the C- OCT 3 1 1994 Although this proposal is benign in it's treatment of the river, it may have trouble getting approval from the Muckleshoot Indians. They may have particular trouble with any work in the river, and with the proposed boat launch. It is the advice of King County that we set up a meeting with the Muckleshoots and Duwamish representatives as soon as possible. Andy Levesque and Phil Schneider should also be invited. They also advise us to invite the Army Corps of Engineers so all the players in the permit process will be there. King County indicated that there is some room for compromise on .their requirements. Since this project is in the tide zone of the river, they are not overly concerned about flooding, and storm water retention. cc John McFarland Ross Earnst Ann Siegenthaler Phil Fraser ViLICKLEBHFIDT TRIB tI COUNCIL 39015 172ND AVENUE S.E. - AUBURN, WASHINGTON 98002 - [208) 939 -331 23 September 1994 Mr. Don Williams City of Tukwila City Hall 6200 Southcenter Blvd. Tukwila, Washington 98188 Dear Mr. Williams: As you know, the allentown Archaeological Site (45K1431), which is eligable to the National Register of Historic Places, is on City of Tukwila park property. The site is also in the traditional territpry of the Mucldeshoot Indian Tribe. We understand that the City of Tukwila may be planning a community center in the vicinity of the Allentown Archaeological Site. we also understand that the City of Tukwila has contracted for additional archaeological testing which was conducted by Historical Research Associatees (HRA) in the fall of 1993 to further delineate boundries of the Allentown Archaeoligical Site. We were not contacted by HRA as part of their study and remind the City of Tukwila that because the Alentown Archaeological Site is a National Register of Historic Places property, the City is required to consult with the Muckleshoot Indian Tribe in conjunction with anyhh decisions made regarding the Allentown Archaeological Site. We also request notification and review of any ground disturbing activities the City of Tukwila may consider for the Allentown Archaeological Site regardless of their assoctiation with the proposed community center or archaeological evaluation. Sincerely, ;I) g Virgiffia Cross Muckleshoot Chairperson cc: Dr. Robert Whitlam, State Archaeologist, Office of Archaeology and Historic Preservation. RECEIVED FEB 0', 71995 COMMUNITY DEVELOPMENT 1. City of Tukwila 6200 Southcenter Boulevard • Tukwila, Washington 98188 Stan Lokting Dave Rutherford ARC Architects 1101 E. Pike Street Seattle, WA 98122 September 22, 1994 RE: Additional Services for Center Project. Gentlemen, RECEIVED SEP Z 2 9994 COMMUNITY DEVELOPMENT John W. Rants, Mayor 93 -B3J6 Traffic Study on Tukwila Community I have received the faxed scope of work from Kittelson & Associates for the traffic impact study on the TCC project. Bruce Haldors has outlined the revised scope of wor.': and has mentioned a price of $7,500 which includes the amount already authorized under Supplemental Services. The previously authorized amount was $1,000 (not $1,200 as Bruce cited in his letter). Allowing for ARC's 10% markup the total cost of the traffic study will be $8,250. This is an increase of $7,250 over the authorized amount. Therefore ARC is authorized to add the expanded traffic study under Additional Services at an increased amount not to exceed $7,250. This work will need to be expedited since it is needed for the SEPA permit process. The Tukwila Planning Department will not accept our SEPA application until this information and the river bank stabilization report are included. Traffic and shoreline work are the two major impacts of this project. If you have any questions or need further clarification please call our office. n you Ran Berg cc Ross Earnst Ann s:S•iege414,4,4er;, Phone: (206) 433 -1800 • City Hall Fax (206) 433 -1833 { RESULTS OF SUB - SURFACE SURVEY AT TILE ALLENTOWN PEA PATCII PROPERTY, .TUKWILA,- WASIIINGTON " • HISTORICAL RESEARCH ASSOCIATES, INC. • • RECEIVED FEB 0 71995 GOMMUm n • DEVELOPMENT Branch OtTice: 301 Doyle Building 119 Pine Street Seattle, Washington 98101 (206) 343 -0226 (206) 343 -0249 Fax Home OMce: P.O. Box 7086 504 Glacier Building 111 N. Higgins Ave.. Missoula, Montana 59807 -7086 (406) 721 -1958 (406) 721 -1964 Fax Branch Office: . Sunshine Bldg., Suite 307 110 2nd Street SW Albuquerque, New Mapco 87102. (505).243.6299 RESULTS OF SUB - SURFACE SURVEY AT THE ALLENTOWN PEA PATCH PROPERTY, TUKWILA, WASHINGTON Prepared for The City of Tukwila -620 Southcenter Blvd. Tukwila, Washington 98188 by Kris H. Wilhelmsen, M.A. HISTORICAL RESEARCH ASSOCIATES, INC. 119 Pine Street, Suite 301 Seattle, WA 98101 • November 5; 1993 HRA# 308 -CIS ' TABLE OF CONTENTS 1.0 INTRODUCTION 2.0 NATURAL HISTORY OF THE REGION 1 2.1 Terrestrial Microenvironments 1 2.2 Aquatic Microenvironments 2 3.0 PREVIOUS RESEARCH IN THE PROJECT AREA 3 3.1 Archaeological Research in the Project Area 3 3.2 Ethnohistoric and Historic Research 4 4.0 DESIGN OF THE SUBSURFACE SURVEY 5 4.1 The Grid System 5 4.2 Justification of Subsurface Observation Technique 5 4.3 Systematic Non - aligned Survey Design 6 5.0 DESCRIPTION OF INITIAL FIELDWORK 6 6.0 DESCRIPTION OF SUBSEQUENT FIELDWORK 7 7.0 INTERPRETATION OF FIELDWORK RESULTS 7 7.1 Distribution of Historic Cultural Remains 7 7.2 Distribution of Prehistoric Cultural Remains 8 8.0 CONCLUSIONS 8 9.0 REFERENCES CITED 10 LIST OF FIGURES Figure 1. Plan Map of Project Area Figure 2. Topographic Map of Project Area 1.0 INTRODUCTION Historical Research Associates, Inc. (HRA) was retained by The City of Tukwila, Washington, to perform an archaeological resource assessment of the City's Allentown Pea Patch property. The property (Project Area) is currently being considered as an alternate site for construction of a community center with sports facilities, playgrounds, pedestrian pathways, parking areas, etc. Previous archaeological work in a small portion of the Project Area resulted in the identification of prehistoric deposits which have been determined to be eligible for listing in the National Register of Historic Places. HRA's work included: 1) reviewing background information on previous archaeological work, 2) implementing a field survey designed to identify any additional archaeological deposits in the Project Area, and 3) making recommendations for treatment of these remains in the future, should they be identified. 2.0 NATURAL HISTORY OF THE REGION The Project Area is located on the alluvial floodplain of the Duwamish River approximately 7 miles upstream from the mouth of the river. Given its close proximity to Puget Sound and upland environments the area has had access to the rich and varied resources of several microenvironmental zones both historically and prehistorically. A discussion of terrestrial microenvironments centers on vegetation patterns which form more or less stable and distinctive communities supporting and structuring floral and faunal communities. 2.1 Terrestrial Microenvironments According to Franklin and Dyrness (1973), the Puget Sound area is located within the Tsuga heterophylla zone, which represents the classic and maximal development of temperate coniferous forests in the world. Within the zone, however, many specialized habitats occur and several of these are represented in and around the Project Area. The uplands are moderately to heavily forested, with Douglas -fir (Pseudotsuga menziesii), western hemlock (Tsuga heteroplzylla), and western redcedar (Thuja plicata) comprising the dominant overstory species. Red alder (Alms rubra) and big -leaf maple (Acct• macrophylluna) are deciduous components, being subordinate in forested habitats and dominant in disturbed areas. Bogs formed in ridge -top depressions are common features that support a variety of marsh and lacustrine plant and animal species. The vegetation on alluvial bottomlands ranges from forests to associations of semi - aquatic plants, depending on water table and drainage characteristics, elevation above the river level, and tidal influences. Thickets of deciduous trees and shrubs grow near river levees and former river channels and include willow (Salix sp.), birch (Betula sp.), vine 1 Littoral environments differ with respect to substrate characteristics, wave action, and current patterns. Unfortunately, it is difficult to determine the value of these variables for Elliott Bay during prehistory and, by extension, the range of littoral microenvironments that might have been exploited. In this generally calm, low- energy environment, however, species of bivalves that may have been exploited include native oyster (Ostrea lurida), little- neck clam (Protothaca staminea), bent nose clam, butter clam, horse clam (Tresus capax), and basket cockle (Campbell 1981). Within the estuarine habitat where the Duwamish river enters Elliott Bay, there are fewer kinds and numbers of fish than in the bay itself. The most characteristic estuarine species likely to have been present prehistorically are the white sturgeon (Acipenser transmontanus) and silver smelt (Hypomesus pretiosus) (Campbell 1981). Important aquatic mammals included the harbor seal (Phoca vitulina), river otter (Lutra sp.), and several species of waterfowl. 3.0 PREVIOUS RESEARCH IN THE PROJECT AREA 3.1 Archaeological Research in the Project Area Recent archaeological research was conducted in the Project Area by Larson Anthropological /Archaeological Services (LAAS), Seattle (Larson et al. 1992; Lewarch et al. 1993), under contract to the Municipality of Metropolitan Seattle (METRO). In conducting a cultural resource assessment of METRO's proposed Alki Transfer /CSO Facilities project, LAAS identified historic and prehistoric resources in the southwestern portion of the Project Area (Figures 1 and 2). Three phases of fieldwork were conducted. Phase 1 was undertaken in 1992 to determine whether cultural deposits were present along a proposed pipeline corridor paralleling 42nd Avenue South. The work resulted in the identification of site 45KI431 consisting of shell- bearing deposits, fish and mammal bone, lithic artifacts, fire - modified rock, and charcoal (Lewarch et al. 1993:1). In 1993, Phase 2 was conducted to investigate a new alignment of the pipeline and to determine its relation to the cultural deposits identified during Phase 1. No potentially significant cultural deposits were identified during Phase 2. Finally, Phase 3 was conducted in 1993, to investigate the southern extent of the new pipeline alignment adjacent to the Duwamish River. Additional cultural deposits were identified as a result, allowing further delineation of the boundaries of Site 45KI431. The physical stratigraphy of the Project Area is interpreted by LAAS as comprised of a series of alluvial strata deposited during over -bank flood events (Lewarch et al. 1993:16). The alluvial deposits consist of discontinuous interbedded strata of sand, silty sand, and sandy silt. A minimum of five distinct cultural layers were observed at different depths between 30 to 150 centimeters and were probably deposited between flood events. The age of the cultural layers was estimated to be approximately 300 years BP (Before Present) on the basis of two radiocarbon dates. The first date was obtained from charcoal at a depth of 50 to 60 centimeters and is dendro- corrected to 300 BP with a range of 460 to 120 BP. The 3 second date was obtained from a depth of 140 to 150 centimeters and is dendro- corrected to 330 BP with a range of 480 to 300 BP. The boundaries of 45KI431 were identified through pedestrian surface survey and the systematic excavation of 50 x 50- centimeter shovel test units. Final boundary estimates, however, were based on the distribution of high and low density concentrations of cultural material below 30 centimeters. Thermally - altered rock encountered in the overlying 30 centimeters was considered to have been disturbed by historic agricultural activities such as plowing, and therefore unsuitable for estimating site boundaries (Lewarch et al. 1993). The following summary is taken from the LAAS report and indicates the potential significance of these cultural deposits to local and regional prehistory: Site 45KI431 deposits have vertical and horizontal integrity, with vertical stratification of cultural deposits and horizontal variation in artifact density. There is extensive evidence of multiple occupation episodes by fisher- hunter- gatherers over the course of at least 200 years and perhaps longer. The time of occupation represents the period directly before and, perhaps, during initial European contact in the region. The site is one of few extant sites reported in the Duwamish river drainage, none of which demonstrate this type of very low artifact density, seasonally reused, limited activity, special purpose site. Based on integrity of site deposits and the potential to contribute information important to regional prehistory, then, 45KI431 is probably eligible for nomination to the National Register of Historic Places (Lewarch et al. 1993:44 -45). 3.2 Ethnohistoric and Historic Research In addition to making recommendations about the potential significance of 45KI431 to local and region prehistory, LAAS investigated the historic and ethnohistoric use of the property in and around the Project Area. Although this information is summarized below, the reader should refer to Lewarch et al. (1993) for more detailed information of regional ethnohistory and history (see also Campbell 1981; Haeberlin and Gunther 1930; Reinartz 1991; Smith 1940; Waterman 1920). The Project Area is within the traditional territory of the Duwamish Indians, a group whose adaptation to local environmental resources included hunting, gathering, and fishing. The Duwamish occupied extended family villages associated with stretches of river in the Duwamish, Black, Cedar, and lower White River drainages. The settlement and subsistence of the Duwamish varied with the structure of available resources. During spring, fall, and summer, the winter village groups dispersed into smaller 4 family groups to hunt, fish, and gather plant foods for immediate consumption and storage for the following winter. Temporary settlements were systematically shifted among different microenvironments as various resources became abundant or available in particular locations. During the winter, the groups returned to their extended villages, which were used for many consecutive years. Few subsistence activities were carried out during the winter rainy season and most people stayed indoors or near the village except for occasional hunting forays. Historically, the Project Area has been used for various agricultural purposes beginning as early as 1854. In 1981, the King County Parks developed a portion of the property for use as a community garden with vehicle parking and restroom facilities. None of the property is currently under cultivation, except for a small area designated for community gardens. 4.0 DESIGN OF THE SUBSURFACE SURVEY 4.1 The Grid System After conducting background archaeological research, HRA's Research Archaeologist designed a subsurface survey technique that would 1) provide adequate coverage of the Project Area, and 2) determine the presence or absence of subsurface archaeological deposits. The Boundary and Topographic Survey Map prepared by Irwin Engineering (1992) was used as the HRA base map for survey design and subsequent field work. The permanent site datum established by LAAS was transferred to the base map, facilitating the extension of that company's original grid system across the Project Area. Thus, the grid coordinates used for provenience by LAAS and HRA are directly comparable and facilitate the comparison and analysis of distributional data generated by each. 4.2 Justification of Subsurface Observation Technique Bucket augers of 4 -inch diameter (auger probes) were judged an adequate technique for subsurface survey in the Project Area, based upon their previous use in the region.. In the Pacific Northwest, archaeological sites containing shell - bearing cultural deposits are prevalent in coastal, deltaic, and riverine environments. These cultural deposits, referred to . as shell middens, have been successfully investigated using bucket augers to delineate their vertical and horizontal structure. Cultural material is determined by the presence of diagnostic artifacts or, more often than not, shell and shell fragments, charcoal, thermally - altered rock, and fish or mammal bones. At 45KI431, the cultural deposits have been found to contain all of these different materials (Lewarch et al. 1993:18). 5 4.3 Systematic Non - aligned Survey Design As previous archaeological research has demonstrated (Dunnell 1983), the spatial structure of archaeological resources is best characterized using a technique that ensures even and adequate coverage of the area of concern. In addition, observations on adjacent transects should be non - aligned, to minimize the probability that more -or -less linear features are missed by the observation technique, in this case auger probes. With these requirements in mind, a systematic, non- aligned survey design was drafted on the HRA base map to identify the location of auger probe placement in the field. Transects were located along east -west grid lines and spaced 40 meters apart from north to south. Along each transect, auger probes were spaced 40 meters apart, and were staggered from one transect to the next resulting in a non - aligned network covering the entire Project Area. In the southern half of the Project Area nearest the river bank, additional auger probes were systematically placed between previously established transects increasing overall density near the river bank. Increasing the density of auger probes along the river was a judgmental procedure, based on the location of site 45KI431 and other riverine sites in the region (cf. Campbell 1981; Thompson 1978). 5.0 DESCRIPTION OF INITIAL FIELDWORK Fieldwork was conducted at the Project Area from 18 -20 October, 1993, by a crew of three HRA archaeologists. To begin, a non- systematic surface survey was conducted to locate evidence of the previous work conducted by LAAS. Several 50 x 50- centimeter test units and a single 1 x 1 -meter excavation unit was observed, leading to the discovery of a permanent site datum. This datum, installed by LAAS, marks the 0- North /0 -East coordinate to which that company's fieldwork was referenced. After locating this permanent site datum, the HRA crew established a temporary datum in an area more central to the Project Area, at coordinate 0- North /90 -East. HRA reference coordinates are therefore tied into the LAAS permanent site datum, facilitating comparison of the work conducted by both firms. The location of each auger probe was determined according to the subsurface design, and located on the ground using a 100 -meter survey tape and compass. The survey tape was aligned along east -west transects and the distance between auger probe locations was measured and narked with pin flags. A total of 62 auger probes (PA1 - PA20 and P1 - P42) were excavated according to the survey design and an additional three (A 1 - A3) were excavated in judgmental locations inside the high- density boundary of site 45KI431 (Figure 1). Auger probes were excavated with a 4 -inch bucket auger in vertical increments of 15 to 20 centimeters. As excavation proceeded, the volume of sediment from each increment was passed through a 1/4 -inch screen and the contents examined for cultural material. Cultural materials that were observed in auger probes included diagnostic artifact fragments, thermally- altered rock, bone, plastic, metal, glass, and charcoal fragments. As these remains 6 were encountered, their depth of origin was estimated to the nearest 10- centimeter arbitrary level and they were bagged and labeled for laboratory analysis. In addition to documenting and collecting cultural materials. for analysis, sediment characteristics were recorded to assess stratigraphic changes signalling different depositional regimes. These characterizations included: Color (tan, light brown, dark brown, black, red); moisture content (dry, moist, wet); cobbles (presence /absence); gravel (presence /absence); and, texture (relative proportions of sand, sit, and clay). Sediment characterizations from auger probe holes and shovel -test units indicate the same general pattern of stratigraphy as reported by LAAS. Agricultural disturbance occurs within the upper 25 to 30 centimeters of brown to dark brown, silty sand. Below this disturbed layer are interbedded layers of brown to light brown colored sand, tan colored silty sand, and bark brown to black colored sand. In general, these strata represent episodes of alluvial deposition of differing intensity. After completing the excavation of 65 auger probes, HRA archaeologists excavated four 50 x 50- centimeter shovel -test units (ST1A - ST4A) near the eastern boundary of 45KI431. The purpose of this work was to define more accurately the boundary of the site. Each unit was excavated in 10- centimeter arbitrary levels to a depth of 30 centimeters and all levels contained cultural material. Thermally - altered rock was the most frequent artifact type encountered followed by fragments of historic material including wire nails, window pane and bottle glass, and brick fragments. Additional shovel -test units were not excavated because the client decided to that further boundary definition would best be conducted during the mitigation phase planned by METRO. 6.0 DESCRIPTION OF SUBSEQUENT FIELDWORK Subsequent fieldwork was conducted on 25 October, 1993 along the bank of the river. The purpose of this work was to examine the contents and stratigraphy of large holes for the presence of cultural material. Previous research by LAAS demonstrated that the focus of prehistoric activity was along the river and, therefore, this additional work was also justified by their results. A total of six 50 x 50- centimeter shovel -test units (ST1 - ST6) were excavated in a southwest to northeast direction approximately 30 to 40 meters from the embankment of the river. Each unit was excavated to a depth of between 100 to 130 centimeters. Cultural material was observed in five of the six shovel -test units. 7.0 INTERPRETATION OF FIELDWORK RESULTS 7.1 Distribution of Historic Cultural Remains Historic cultural remains were found in auger probes at the extreme eastern end. of the Project Area, along the river, and along the eastern boundary of 45KI431. At the eastern ‘'+ 7 end of the Project Area, artifact types recovered by screening include fragments.of wire nails, red ceramic, window pane and bottle glass, bone, and non - diagnostic fragments. Most of this material was recovered from the upper 10 to 15 centimeters of sediment and much of it was burned. The evidence suggests that this area has been used recently for the disposal of refuse, which was burned either before or after deposition (Figure 1). The cultural remains found near the site and along the river were quite similar although very few of the artifacts were burned. Artifact types recovered include fragments of brick, ceramic (flower pots ?), windowpane glass, bottle glass, and non- diagnostic fragments. This material is mixed in the upper 30 centimeters of sediment due to recent agricultural activity. 7.2 Distribution of Prehistoric Cultural Remains Prehistoric cultural remains were found in shovel -test units along the eastern boundary of 45KI431 and along the bank of the river (Figure 1). Shovel -test units along the site boundary were excavated to 30 centimeters and cultural remains were found distributed throughout. Prehistoric artifacts recovered include thermally- altered rocks and non - diagnostic lithic fragments. These are thoroughly mixed .with historic materials indicating the depth of agricultural disturbance. Prehistoric artifacts recovered in shovel -test units along the bank of the river also include thermally - altered rocks and non - diagnostic lithic fragments. The frequency of thermally- altered rocks is highest near the low- density boundary of site 451(I431 and, progressing eastward, quickly falls to zero. This evidence suggests that prehistoric activity along the riverbank was limited to the area generally defined by LAAS during testing phase research. 8.0 CONCLUSIONS Previous archaeological work in the Project Area resulted in the identification of prehistoric deposits which were determined eligible for nomination to the National Register. Subsequent fieldwork was conducted by HRA to determine whether other archaeological deposits were locate on property and, if so, to determine the vertical and horizontal extent. After reviewing background archaeological information, a systematic non - aligned survey was designed and implemented. This survey included the use of 4 -inch auger probes and 50 x 50- centimeter shovel -test units as subsurface observation techniques. Auger probes and shovel -test units were placed at higher densities along the river bank because previous fieldwork (Lewarch et al. 1993) had indicated that this was the focus of prehistoric activity, rather than farther away from the river. 8 Data generated from 65 auger probes and ten 50 x 50- centimeter shovel -test units were used in the subsequent analysis. Recent activity is reflected in high concentrations of historic artifacts in the extreme stern end of the Project Area, near the bank of the river. Prehistoric activity is reflected in high concentrations of thermally altered rock, and is generally confined to the area of 45KI431, previously investigated by LAAS. The Duwamish River floodplain is a relatively recent feature, however, and it is possible that cultural remains lie buried at a depth accessible only through extensive excavation using heavy equipment. In summary, HRA's background research has shown that 45KI431 lies within the Project Area, and has been determined eligible to the National Register (Lewarch et al. 1993). METRO is currently planning further archaeological research to mitigate construction - related impacts to this site. Results of the subsurface archaeological survey conducted by HRA do not indicate that other significant cultural resources are present within the Project Area. HRA therefore recommends no further cultural resource investigations, with the following caution: should cultural resources be encountered during construction - related activities, construction should be halted and the Office of Archaeology and Historic Preservation (206- 753 -4405) be contacted prior to resuming. 9.0 REFERENCES CITED Campbell, S.K. 1981 The Duwamish No. 1 Site: A Lower Puget Sound Shell Midden. University of Washington, Office of Public Archaeology, Research Report 1. Dunnell, R.C. 1983 Aspects of the Spatial Structure of the Mayo Site (15- JO -14) Johnson County, Kentucky. In, Lulu Linear Punctated: Essays in Honor of George Irving Quimby, edited by Robert C. Dunnell and Donald K. Grayson, pp. 109 -165. Museum of Anthropology, Anthropological Papers No. 72, University of Michigan, Ann Arbor. Franklin, J.F. and C.T. Dyrness 1973 Natural Vegetation of Oregon and Washington. USDA, Forest Service, General Technical Report PNW -8. Haeberlin, H. and E. Gunther 1930 The Indians of Puget Sound. University of Washington, Publications in Anthropology 4(1):1 -84. Irwin Engineering 1992 Boundary and Topographic Survey- Allentown Pea Patch and Codiga Farm, City of Tukwila, WA. Prepared for Bruce Dees and Associates. Larson, L.L., D.E. Lewarch, and J.R. Robbins 1992 Alki Transfer /CSO Southern Transfer /Interurban Project Cultural Resources Assessment. Larson Anthropological /Archaeological Services, Seattle, Washington. Submitted to HDR Engineering, Bellevue, Washington, LAAS Technical Report /192 -10. Lewarch, D.E., L.L. Larson, J.R. Robbins, and P.S. Solimano 1993 Metro Alki Transfer /CSO Project Allentown Site (45KI431) survey and Evaluation. Larson Anthropological /Archaeological Services, Seattle, Washington. Submitted to HDR Engineering, Bellevue, Washington, LAAS Technical Report //92 -8. Reinartz, K.F. 1991 Tukwila, Community at the Crossroads. The City of Tukwila, Tukwila, Washington. Smith, M.W. 1940 The Puyallup - Nisqually. Columbia University Contributions to Anthropology 32. 10 Thompson, G. 1978 Prehistoric Settlement Changes in the Southern Northwest Coast:. A Functional Approach. University of Washington, Department of Anthropology, Reports in Archaeology 5. Waterman, T.T. 1920 Puget Sound Geography. Ms. on microfilm, Suzzallo Library, University of Washington, Microfilm #A3435. 124th Street 0 0 0 ❑ ❑ 0 • r ❑ • • ❑ 0 ❑ N ❑ ❑ a• • Q ❑ ❑ O • • • • • • ❑ ❑ • ❑ '•L • ❑ • • 0 0 ❑ ❑ ❑ • ❑ • • • • ■ • • • • • • • • • • • • • • • • • • • • • • • • • • • • i • Datum (0.0N/0.OE) Structures Fence Line • • • • • • ■ • • • • s Refuse Dump(?), • D cr.! c CD CO • 0 c o 80 METERS HRA: a 50 x 50 cm. Shovel Test Units • 4 Inch Auger Probes LAAS: ❑ 50 x 50 cm. Shovel Test Units 0 1 x 1 Meter Test Units Estimated Boundaries of 45KI431: High Density Low Density Figure 1. Map of Project Area. 42nd Avenue South 124th Street 17 18 20 19 <<___:'>—Trench contdntng pipes (irrigation system7) 19 rn D C (D 0 0 80 METERS One Foot Contour Interval N T Datum Estimated Boundaries of 45K1431: • Structures High Density Fence Line Low Density Figure 2. Topographic map of Project Area (after Erwin Engineering, 1992). ARTIFACT CATALOG Catalog# IlD# iN/S 'ENV ILevel Depth 'Material ;Artifact Type Characteristics 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 2.1 3.1 4.1 5.1 5.2 5.3 5.4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 8.1 8.2 1P13 1P13 1P13 I IP13 IP13 'P13 1P13 1P13 IP13 1P13 :P13 IP13 1P13 1P13 I1P13 IP13 1P13 t !PIS i 1 i :PM i 4 P13 P13 P13 P13 013 P13 P13 P13 p13 - P14 t 139 i 1P23 1P23 P23 P23 ST1A ST1A tST1A ., ST1A ST1A + ST1A ST1A ST1A +ST1A ST1A +ST1A ST1A ST1A ST1A t ST1A ST1A :4N30 1N30 IN30 iN30 IN30 1N30 IN30 IN30 1N30 'N30 II■130 IN30 TN30 1N30 iN30 IN30 / ,N30 IN30 11\130 IN30 IN30 i I 4- t N30 N30 N30 N30 N30 N30 N40 N30 N20 ,N50 + N50 N50 N50 tN0 NO t NO NO NO NO NO ,NO NO NO NO NO NO NO NO NO E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E270 E250 E110 E210 E270 E270 E270 E270 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 1,2 1,2 1,2 1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 5 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 10-20 40-50 0-10 0-20 0-20 0-20 0-20 0-10 0-10 0-10 0-10 0-10 0-10 0-10 10-20 10-20 10-20 10-20 10-20 10-20 10-20 20-30 20-30 Metal !Nail Metal , Metal Metal INail Metal 'Nail Metal !Nail Metal 1 Bone Bone IND Bone IND Bone IND Bone IND Bone IND Bone IND Bone IND Bone IND Bone IND Bone IND Rubber IND ND IND ND IND ND ND ,ND ND IND ND IND ND ]ND ;ND + 'Ceramic Ceramic Metal IND Metal Glass Glass ND Lithic Lithic Lithic Lithic Lithic Metal Metal Lithic Lithic Lithic Lithic Metal Metal ND Metal Glass Nail Nail Nail ND ND ND Brick(?) ND Nail Clear Clear ND TAR TAR TAR TAR TAR Nail Nail TAR TAR TAR TAR Nail Nail ND Nail Bottle Wire, Fragment Wire, Fragment Wire, Fragment Wire, Fragment Wire, Fragment Wire, Fragment Wire, Fragment Burned, Fragment Burned, Fragment Fragment Fragment Fragment Fragment Fragment Fragment Fragment Fragment Fragment Fragment Burned, Fragment Burned, Fragment Bumed, Fragment Burned, Fragment Burned, Fragment Burned, Fragment Burned, Fragment Burned, Fragment Red, Fragment Fragment Fragment Wire, Fragment Window, Fragment Bottle, Fragment Burned Angular, Fragment Angular, Fragment Angular, Fragment Angular, Fragment Angular, Fragment Wire, Fragment Wire, Fragment Angular, Fragment Angular, Fragment Angular, Fragment • Angular, Fragment ND, Fragment ND, Fragment Bumed, Fragment Wire, Fragment Brown, Fragment 1 ARTIFACT CATALOG Catalog# ID# I N/S IE/VV Level IDepth Material !Artifact Type Characteristic 1 8.3 8.4 8.5 1 8.6 IST1A 8.7 IST1A 8.8 1ST1A 1 8.9 :ST1A 9.1 1ST2A 9.2 !ST2A 9.3 iST2A 9.4 IST2A 9.5 1ST2A ; 9.6 IST2A 9.7 1ST2A 9.8 IST2A 9.9 IST2A 9.10 I 9.11 IST2A --; 9.12 IST2A 9.13 iST2A 9.14 IST2A 9.15 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 10.10 10.11 10.12 11.1 11.2 11.3 11.4 - 11.5 11.6 11.7 11.8 11.9 11.10 11.1 11.2 11.3 11.4 11.5 11.6 ST1A ST1A ST1A r ST2A IST2A ;ST2A IST2A I ST2A IST2A I I ST2A 1ST2A I ST2A IST2A IST2A ST2A IST2A ; ST2A i S T 2A 1- I ST2A IST2A IST2A IST2A • 1ST2A ST2A ST2A IST2A !ST2A IST2A IST3A IST3A ;-• ;ST3A ST3A 1ST3A 1ST3A I I 1N0 INO INO I iN0 -I 1N20 !N20 IN20 -..). I !N20 rN20 I 1 IN20 11\120 1N20 IN20 I I 4N20 IN20 IN20 • f- ; 11\120 I i I- 'N20 I I 1N20 I 1N20 NO NO NO N20 N20 N20 N20 $120 N20 N20 N20 N20 N20 N20 N20 N20 N20 + N20 N20 N20 1N20 N20 N20 N20 S20 820 S20 S20 4S20 S20 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E35 E55 E55 E55 E55 E55 E55 • (.1 c+) C) co co Cl e— r 1— e— N N N N N N1N'N:N N N N c) 01 CO kr) V) C") (4) (Y) j e-- e- - 20-30 20-30 20-30 20-30 20-30 20-30 20-30 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 0-10 •I 0-10 0-10 0-10 10-20 10-20 10-20 10-20 10-20 10-20 10-20 10-20 10-20 10-20 10-20 10-20 20-30 20-30 20-30 20-30 20-30 20-30 20-30 20-30 20-30 20-30 • 0-10 0-10 • 0-10 • 0-10 0-10 0-10 Lithic !TAR Lithic ; t .;.,. Lithic ITAR Lithic ITAR Glass !Bottle Lithic ;Coal(?) 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Lithic :TAR Lithic ITAR Lithic ITAR Lithic ITAR I Lithic ITAR Lithic 'TAR Lithic ITAR Glass IND i Lithic ITAR Lithic ITAR i Lithic 'TAR Lithic [TAR Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Lithic Ceramic Ceramic Metal Lithic Glass FTAR TAR [TAR TAR TAR 1TAR 1TAR 1TAR TAR TAR TAR ITAR iTAR !TAR [TAR 1TAR , !TAR ITAR !TAR 1 !TAR ;Coal(?) 1Coal(?) 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Transportation Planning /Traffic Engineering Ri=r"I=IVFD NOV 3 0 1994 November 1994 1) c.VELOr'MENT TRANSPORTATION IMPACT ANALYSIS for the Tukwila Community Center Tukwila, Washington Prepared for: City of Tukwila 6300 Southcenter Blvd. Tukwila, WA 98188 Prepared by: Kittelson & Associates 14575 Bel -Red Road, Suite 102 Bellevue, WA 98007 November 1994 Project: 1376.00. November 1994 Tukwila Community Center TABLE OF CONTENTS INTRODUCTION 1 SCOPE OF THE REPORT 1 PROJECT DESCRIPTION 1 EXISTING CONDITIONS 5 SITE CONDITIONS AND ADJACENT LAND USES 5 TRANSPORTATION FACILITIES 5 PEDESTRIAN AND BICYCLE FACILITIES AND ACTIVITY 6 TRANSIT FACILITIES 6 TRAFFIC VOLUMES AND PEAK HOUR OPERATIONS 6 TRAFFIC SAFETY 11 PLANNED TRANSPORTATION IMPROVEMENTS 12 TRAFFIC IMPACT ANALYSIS 13 PROPOSED DEVELOPMENT PLANS 13 TRIP GENERATION 14 TRIP DISTRIBUTION /ASSIGNMENT ANALYSIS 17 FUTURE TRAFFIC VOLUMES /OPERATIONAL ANALYSIS 17 SIGNAL WARRANT EVALUATION 21 ALTERNATIVE MODE TRAVEL TO THE SITE 25 FINDINGS AND RECOMMENDATIONS 28 REFERENCES 29 Appendix A - Level of Service Concept Appendix B - HCM Worksheets Kittelson & Associates, Inc. i Table of Contents November 1994 Tukwila Community Center LIST OF TABLES 1 - Existing Intersection Level of Service 9 2 - Accident Summary 12 3 - Trip Generation Comparisons 15 4 - Tukwila Community Center Trip Generation - Full . Buildout 15 5 - Future 1995 Intersection Level of Service with Site 17 6 - Signal Warrant Analysis 22 7 - Proportionate Intersection Traffic 25 8 - Service Area for 10 Minute Travel Time 26 LIST OF FIGURES 1 - Site Vicinity Map 2 2 - Proposed Site Plan 3 3 - Intersection Lane Configuration and Control 7 4 - Existing Traffic Volumes Daily and Weekday P.M. Peak Hour 8 5 - Potential Channelization 124th/42nd Intersection 10 6 - Weekday Hourly Profile, Community Center Traffic 16 7 - Estimated Trip Distribution Weekday P.M. Peak Hour 18 8 - Total Site Generated Traffic Daily and Weekday P.M. Peak Hour 19 9 - 1995 Total Traffic Volumes With Site Daily and Weekday P.M. Peak Hour . . 20 Kittelson & Associates, Inc. ii Table of Contents November 1994 Tukwila Community Center EXECUTIVE SUMMARY An approximate 53,000 square foot Community Center is proposed on the southeast corner of 42nd Avenue South and South 124th Street in Tukwila, Washington. The following paragraphs describe the analysis methodology employed, analysis results, and the recommendations from the study. Traffic Analysis Methodology • The traffic analysis methodology employed in this investigation relies upon standard and nationally- accepted traffic engineering principles and practices. The methodology uses reasonable but "worst case" assumptions in several key areas to ensure a conservative analysis. All analyses are based upon the peak 15 minutes of the evening peak hour. For the remainder of the evening peak hour and during all other hours of the day and week, total traffic demands are likely to be less than is indicated in this report. Findings/Recommendations • The intersection of 42nd Avenue South and South 124th Street intersection is currently operating at level of service "F" during weekday p.m. peak hour conditions. • To mitigate the level of service deficiency at the 42nd Avenue South/South 124th Street intersection, the intersection should be signalized. The signalization will improve peak hour traffic operations from level of service "F" to "B" during weekday p.m. peak hour conditions. • Based on existing and site generated peak hour traffic volumes, the proposed Community Center should contribute approximately 4 percent to the overall cost of the signal installation. • At full build -out, the proposed center will generate approximately 1,940 daily vehicular weekday trips, with approximately 235 vehicular trips being generated during the weekday p.m. peak hour. • A sidewalk should be extended from the site frontage from 42nd Avenue South to the Green River Bridge to provide a better connection to the Duwamisb/Green River Trail. Kittelson & Associates, Inc. I Executive Summary November 1994 Tukwila Community Center INTRODUCTION SCOPE OF THE REPORT The purpose of this analysis is to determine transportation related impacts of the proposed new Tukwila Community Center located at the southeast corner of 42nd Avenue South and South 124th Street in the Allentown neighborhood of Tukwila in King County, Washington. Figure 1 shows the vicinity of the proposed development in relationship to the major transportation facilities in the area. Specific issues discussed in this report include: • Existing land use within the project study area. • Existing traffic conditions in the site vicinity for p.m. peak hour conditions. • Trip generation characteristics for the proposed center. • Traffic impact of the proposed development on future peak hour operations at key intersections in the site vicinity. • Signal warrant evaluation at the intersection of 42nd Avenue South/South 124th Street. • Analysis of bicycle /pedestrian access issues to/from the site. PROJECT DESCRIPTION The proposed site plan is shown in Figure 2. The Tukwila Community Center will have a total building area of approximately 53,000 square feet and will include a wide variety of facilities catering to all age groups. The new Tukwila Community Center will replace the existing 24,000 square foot facility located nearby on South 131st Street. The site plan shows two full access driveways serving the center, one on 42nd Avenue South and one on South 124th Street. The site development is planned to occur in two phases. The first phase will include the Community Center facility, parking for 300 cars, a children's play area, river access for viewing, a walking /jogging path, off-site improvements and site landscaping. The second phase will include expansion of the parking area, a basketball/multi-purpose court, a multi - purpose athletic field, a walking/jogging trail, a tennis court, a volleyball court, a Kittelson & Associates, Inc. 1 Introduction SITE VICINITY MAP TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 1 p Na NOVEMBER 1994 1376F001 PROPOSED SITE PLAN TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 2 NOVEMBER 1994 1376F002. November 1994 Tukwila Community Center picnic shelter and other picnic areas, bocce ball for the senior center, horseshoe pits and site landscaping. The Tukwila Community Center is scheduled to be operational by 1995. Thus, analysis is focused on existing conditions plus project, which reflect 1995 conditions. Kittelson & Associates, Inc. 4 Introduction November 1994 Tukwila Community Center EXISTING CONDITIONS SITE CONDITIONS AND ADJACENT LAND USES The site for the proposed new Tukwila Community Center is located at the southeast corner of 42nd Avenue South and South 124th Street in the Allentown neighborhood of Tukwila, King County, Washington. The site is bounded by 124th Street to the north, 42nd Avenue South to the west, 45th Avenue South to the east, and by the Green River to the south. Current land uses in the vicinity of the site include a neighborhood convenience store (Allentown Grocery) and a City Park: the Allentown Pea -Patch and compost demonstration garden. Surrounding the site, land uses are primarily neighborhood residential. Immediately to the south of the site, 42nd Avenue crosses the Green River via a two -lane bridge. TRANSPORTATION FACILITIES The proposed Tukwila Community Center will replace the existing Community Center as the only center of its kind in the City of Tukwila, and thus will serve the entire Tukwila community. According to staff at the existing Tukwila Community Center, residents from Burien, Renton, SeaTac and Seattle also make use of the facility. Considering the location of the proposed Community Center in relation to the city limits and the surrounding communities, the primary access to the center is likely to be provided by Interurban Avenue (which will be used by traffic from Highway 599 and I -5) from the south, and by Highway 99 and 130th Street from the south and west. In addition to these routes, access from the north will be via 42nd Avenue South, and from the east via South 129th Street. Both South 42nd Avenue and South 124th Street are classified as collector arterials by the City of Tukwila. Both facilities are two-lane roadways without curbs, gutters or sidewalks. No on- street parking is allowed on either street. The posted speed limit on both 42nd Avenue South and South 124th Street is 30 mph. The "T" intersection of 42nd Avenue South and 124th Street is stop - controlled on all three approaches. Each approach to the intersection has a single lane. Interurban Avenue is a two -lane facility to the north of 42nd Avenue South, with a posted speed of 35 mph and no sidewalks. To the south of this intersection, it is a four -lane facility with a sidewalk on the east side only. No bicycle facilities are provided. Lane configurations and pertinent roadway characteristics for the signalized intersection of Interurban/42nd Kittelson & Associates, Inc. 5 Existing Conditions November 1994 Tukwila Community Center Avenue South and the all -way stop controlled intersection of 42nd Avenue South/South 124th Street intersection are shown together with sidewalk information in Figure 3. PEDESTRIAN AND BICYCLE FACILITIES AND ACTIVITY Pedestrian and bicycle facilities in the area are minimal. There are no sidewalks or bicycle lanes on South 124th Street. The bridge over the Green River has a sidewalk on one side only, and no provision for bicycles. The roadway shoulders on both 42nd Avenue South and South 124th Street are unpaved. As a result of the transportation facilities, and as expected, field observations in the vicinity of the project site indicated relatively little pedestrian and bicycle activity. TRANSIT FACILITIES Transit service in the vicinity of the site is provided by Metro via Route 124 (Airport) which has a bus stop on 42nd Avenue at the Allentown Grocery. This route provides service at approximate 30 minute headways on weekdays, and approximate 60 minute headways on weekends. TRAFFIC VOLUMES AND PEAK HOUR OPERATIONS As described in the trip generation section of this report, the combination of site - generated plus background traffic will be greatest during the weekday p.m. peak hour. Thus, this analysis focused on weekday p.m. peak hour traffic conditions. Manual traffic counts were conducted at the two study area intersections of 42nd Avenue South/South 124th Street and Interurban Avenue /42nd Avenue South during weekday evening peak hours on mid -week days during September 1994. The weekday p.m. peak hour was found to generally occur between 3:30 and 4:30 p.m. and the resultant turning movements are shown in Figure 4. Current Levels of Service All level -of- service (LOS) analyses described in this report are in accordance with the procedures stated in the 1985 Highway Capacity Manual (Reference 1). A description of LOS and the criteria by which they are determined is presented in Appendix A. Appendix A also indicates how LOS is measured and what is generally considered to be the acceptable range of LOS. To ensure that this analysis was based on a reasonable worst -case scenario, the peak 15- minute flow rate during the weekday p.m. peak hour was used in the evaluation of all Kittelson & Associates, Inc. 6 Existing Conditions EXISTING TRAFFIC VOLUMES WEEKDAY P.M. PEAK HOUR TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE J I� NOVEMBER 1994 1376F003 - TWO WAY AVERAGE WEEKDAY DAILY TRAFFIC EXISTING TRAFFIC VOLUMES DAILY AND WEEKDAY P.M. PEAK HOUR TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 4 MM NOVEMBER 1994 1376F004 . Tukwila Community Center intersection levels of service. For this reason, the analyses reflect conditions that are only likely to occur for 15 minutes out of each average weekday p.m. peak hour. Traffic conditions during all other weekday and weekend periods will likely operate better than those described in this report, except possibly when a special event occurs on a weekend. The levels of service for the existing signalized and all-way stop controlled intersection during weekday p.m. peak hour are listed in Table 1. Table 1 Existing Intersection Level of Service Intersection (control type) Delay (sec/veh) Volume/ Capacity Level of Service Interurban Ave /42nd Ave So. (signal) 16.0 0.46 C 42nd Ave So. /So. 124th St (all -way stop) * 1.46 F * - meaningless when V/C greater than 1.2 As shown in Table 1, for existing weekday p.m. peak hour traffic conditions the signalized intersection of Interurban Avenue /42nd Avenue South operates at LOS "C" with a volume /capacity ratio 0.46. The all-way stop controlled intersection 42nd Avenue South/South 124th Street was found to operate at LOS "F" with volume capacity ratio of 1.46. Based on review of the traffic operational data and field observations, the LOS problem was identified to be a result of significant northbound to eastbound right turning movements and westbound to southbound left turns. Compounding the LOS problem is the fact that heavy vehicles comprise approximately eight percent of the traffic stream during the weekday p.m. peak hour. To mitigate the identified level of service deficiency at the intersection of 42nd Ave. S. /S. 124th St., various alternatives were investigated including; change in traffic control, capacity improvements, and channelization improvements. One conceptual alternative investigated includes the installation of a raised island to channelize northbound to eastbound right turns to provide for an effective free right turn without stopping for the northbound to eastbound movement. Figure 5 presents the conceptual channelization to mitigate the existing level of service deficiency. It is important to recognize that the sketch as shown in Figure 5 is conceptual. Kittelson & Associates, Inc. 9 Existing Conditions 42ND AVE. S. 124TH ST. YIELD SIGN CHANNELIZE NORTHBOUND RIGHT TURNS NORTH (NOT TO SCALE) POTENTIAL CHANNELIZATION 124TH/42ND INTERSECTION TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 5 K NOVEMBER 1994 1376F005 November 1994 Tukwila Community Center Based on discussions with City of Tukwila Staff, the channelization as presented in Figure 5 is unlikely to be implemented based on the following reasons: • right of way is very likely to result in a full take of the community grocery store due to removal of its access and parking which will cost an unusually high amount. • There is no grant resource for this as the project is not a high enough capacity or safety problem to rate on a state or regional level. • The wheel base 50 truck radius needed to serve the high amount of truck traffic will result in a high speed curve for car and pickup traffic. The community has continued to express major concern for safety - opposing high speeds as well as the truck traffic. The WB50 radius would be a significant concern for the community and council in approving this type of improvement. • The community has continued to express its high priority to maintain the "local" grocery stores remaining in Tukwila: the right -of -way take and continuous traffic movement at the store access would render it unviable from a safety perspective by the residents. As a result of the aforementioned issues, the improvement with the highest likelihood for implementation is signalization of the intersection. Consequently, a signal warrant analysis was conducted and is further described in a subsequent section of this report. As described in the signal warrant section of this report, the signal warrants at the intersection are marginally met. However, given the fact that the capacity enhancement alternatives at the intersection are not feasible, the best long term solution is signalization of the intersection with the north to east and east to south movement on 42nd and 124th the major street and the north leg S. 42nd Avenue as the minor street. With signalization, the intersection is anticipated to operate at LOS B with a volume /capacity ratio of 0.35 and average delay of 6.1 seconds /vehicle. TRAFFIC SAFETY The most recent available four year (July 1991 through June 1994) accident information was obtained from the City of Tukwila for the key study area intersections in the site vicinity. Kittelson & Associates, Inc. 11 Existing Conditions .. November 1994 Tukwila Community Center Accidents are tabulated here as the number of accidents per million entering vehicles occurring at each intersection. Table 2 shows the accident investigation summary. Table 2 Accident Summary Intersection Total No. of Accidents (7/91 through 6/94) Accidents/MEV (Million Entering Vehicles) 42nd Ave. So. /So. 124th St. 3 0.26 42nd Ave. So./Interurban Ave. 5 0.38 Table 2 shows that both study area intersections have an accident rate of less than 0.40. Further investigation into the type, frequency, and severity of the accidents indicated no significant safety. The intersection accidents appear to be random and not severe. Based on the results of the traffic accident investigation, it is concluded that no significant traffic safety problem currently exists at the intersections in the immediate site vicinity. PLANNED TRANSPORTATION IMPROVEMENTS The Duwamish/Green River Trail which is planned and currently under construction will follow the west bank of the Green River, opposite the proposed new Center. The 42nd Avenue South bridge provides a connection over the River to the proposed Tukwila Community Center, although no plans exist to provide separate bicycle lanes. Conversations with City of Tukwila officials indicate that there has been some discussion with regard to relocating truck movements on 42nd Avenue South to relieve the heavy vehicle demand on 42nd Avenue South especially at the intersection of 42nd Avenue South/South 124th Street. However, to date no formal adoption of the aforementioned improvement has been identified. Thus, no formal design plans have been completed. Kittelson & Associates, Inc. 12 Existing Conditions November 1994 Tukwila Community Center TRAFFIC IMPACT ANALYSIS The impacts of the proposed new Tukwila Community Center during a typical weekday p.m. peak hour were analyzed as follows: • Based on the proposed size and services provided by the proposed facility, the total number of future daily and weekday a.m., mid -day, and p.m. peak hour trips were estimated for complete build -out of the site. • Predicted site - generated traffic for weekday evening peak hour and daily basis were assigned to the roadway network and added to the background traffic volumes to reflect 1995 conditions with the site. • Future traffic demands on each of the key intersections in the vicinity of the proposed Tukwila Community Center were analyzed, identifying any capacity or roadway deficiencies with full build -out of the proposed development. • Level of service analyses were performed using the Highway Capacity Software (HCS) for signalized and unsignalized intersections. • Traffic signal warrant analyses were conducted at the 42nd Avenue South/South 124th Street intersection for future 1995 conditions with the proposed site. • An evaluation of pedestrian/bicycle operational and safety issues. A detailed discussion of this methodology and the results of the analyses is contained in the remainder of the this report. PROPOSED DEVELOPMENT PLANS The proposed new Tukwila Community Center will be built in two phases. As previously described, the first will include approximately 53,000 square feet of buildings, parking, off - site improvements and some outdoor on -site improvements, and the second phase will add to the parking and outdoor recreational facilities. All facilities are anticipated to be operational by 1995. Kittelson & Associates, Inc. 13 Traffic Impact Analysis November 1994 Tukwila Community Center TRIP GENERATION The proposed Tukwila Community Center will provide a full range of recreational activities. Estimates of total daily and peak hour driveway volumes for a Recreational Community Center are contained in the latest available edition of the ITE Trip Generation Manual (Reference 2). The trip rates in the ITE report are based on empirical observations at only one Recreational Community Center located in Rochester, New York, a 140,000 square foot facility that had 14,000 members. The ITE Trip Generation Manual describes a Recreational Community Center as "facilities similar to and including YMCA's, often including classes and clubs for adults and children, day care or a nursery school, meeting rooms, swimming pools and whirlpools, saunas, tennis, racquetball, and handball courts, exercise classes, weight lifting and gymnastics equipment, locker rooms, and a restaurant or snack bar." The proposed Tukwila Community Center is different from that identified in the Trip Generation Manual. The size of the facility and types of services provided are different from those at the Rochester facility. Given the weak database regarding trip generation for community centers, and the unique characteristics of the Tukwila Community Center, a separate trip generation survey was conducted at an existing Community Center in Tacoma (Norpointe) which shares similar characteristics to those of the proposed Tukwila facility. The Tacoma Norpointe facility was designed by ARC Architects where are also designing the Tukwila facility. The Tukwila facility is slightly larger than that of the Norpointe facility and contains athletic fields that Tacoma does not have. The purpose of the special trip generation study was to develop a specific trip generation rates for a Community Center such as the Tukwila facility. In addition to the trip generation study conducted at the Norpointe Center, Kittelson & Associates, Inc. compared trip rates at other facilities and on interviews with other Community Center operators located in the Pacific Northwest as well as a prior study conducted at the Renton Community Center. Information obtained from interviews with a number of Community Center Facility managers in the Puget Sound area indicated that the majority of their program support occurred during the week, with the highest traffic perceived to occur around the weekday p.m. peak hour. Additionally, based on the anticipated services provided and available recreational facilities a comparative trip generation analysis was conducted. Table 3 contains a summary of the comparative trip generation analysis. The assumed trip generation for the proposed new Tukwila Community Center is shown in Table 4. Kittelson & Associates, Inc. 14 Traffic Impact Analysis November 1994 Tukwila Community Center Table 3 Trip Generation Comparisons Table 4 Tukwila Community Center Trip Generation - Full Buildout Time Period (weekday) Location Renton (TSM Study) Eadsting Tukwila Tualatin Hills Norpointe Tacoma ITE Renton Study Estimate Size (sf.) 35,000 24,000 103,20 42,000 150,000 53,305 Daily Trips 2,806 996 2,795 1,093 N/A 13,540 Rate ( /1,000 sf.) 80.17 41.5 27.1 26.0 N/A 254.0 P.M. Peak Hour 374 150 175 159 193 506 Rate ( /1,000 sf.) 10.68 6.25 1.7 3.8 1.38 9.49 Table 4 Tukwila Community Center Trip Generation - Full Buildout Time Period (weekday) Rate (Trips /1,000 gsfi) Total Trips In Out Daily Generation 36.6 1,940 970 970 A.M. Peak Hour 2.07 110 60 50 Mid -day Peak Hour 2.73 145 65 80 P.M. Peak Hour 4.43 235 120 115 1 - gross square feet As shown in Table 4, the new Community Center is expected to generate approximately 1,940 new daily vehicle trips and 235 new weekday p.m. peak hour trips on the surrounding transportation system. The estimated mid -day peak hour trip generation is estimated to be 145 vehicle trips, and during the a.m. peak hour an estimated 110 trips will be generated. Based on review of available trip generation information an hourly profile of weekday traffic was prepared to show the parking characteristics of the site. As seen in Figure 6, on an average weekday the traffic to /from the community center peaks right before lunch (noon) and after work (after 5 p.m.). This is a logical trip pattern given that the Community Center is primarily a destination oriented recreational facility. Kittelson & Associates, Inc. 15 Traffic Impact Analysis Community Center Traffic Hourly Profile 1 1 1 1 1 1 1 1 I I_ I I 1 I 1 3 5 7 9 11 1 3 5 7 9 11 2 4 6 8 10 12 2 Hour Ending 4 6 8 10 12 WEEKDAY HOURLY PROFILE COMMUNITY CENTER TRAFFIC TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 6 EWA IN NOVEMBER 1994 1376F006 November 1994 Tukwila Community Center TRIP DISTRIBUTION /ASSIGNMENT ANALYSIS The distribution of site - generated trips onto the roadway system within the study impact area was estimated through evaluation of housing density, employment characteristics in the area, and in discussions with the City of Tukwila staff. Figure 7 shows the estimated trip distribution pattern expected for the proposed expansion. Figure 8 shows the site - generated traffic during a typical weekday and p.m. peak hour. It is important to recognize that although the proposed Tukwila Community Center is new, the proposed Community Center is effectively replacing the existing Community Center. Therefore, the true traffic "impact" of the proposed facility is not as great as reported in this document since there will be a considerable amount of "diverted" traffic that was already using the existing Community Center in Tukwila and thus is not "new" to the transportation system. FUTURE TRAFFIC VOLUMES /OPERATIONAL ANALYSIS Figure 8 was added to Figure 4 to show the total weekday p.m. peak hour traffic volumes at the two study area intersections and as shown in Figure 9. Table 5 shows the intersection level of service for predicted 1995 weekday p.m. peak hour traffic conditions with the proposed Tukwila Community Center in operation. Table 5 Future 1995 Intersection Level of Service with Site Intersection (control type) Delay (sec/veh) Volume/ Capacity Level of Service Interurban Ave /42nd Ave So. (signal) 18.2 0.59 C 42nd Ave So. /So. 124th St (all -way stop) * 1.46 F 42nd Ave. So. /So. 124th St. (signal) 7.7 0.46 B * - Meaningless when V/C greater than 1.2. As shown in Table 5, both study area intersections are predicted to operate at acceptable levels of service with the proposed site signalization of 42nd Ave. SJS. 124th St. intersection. Kittelson & Associates, Inc. 17 Traffic Impact Analysis NORTH (NOT TO SCALE) ESTIMATED TRIP DISTRIBUTION WEEKDAY P.M. PEAK HOUR TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 7 NOVEMBER 1994 1376F00 NORTH (NOT TO SCALE) — f- 11� 18 S. 124TH ST. ACROSS THE STEEL HILL BRIDGE • • • • • ♦ �.• OR ♦ • �EEN 4 S 130TH W z LEGEND - TWO WAY DAILY SITE GENERATED VOLUME TOTAL SITE GENERATED TRAFFIC DAILY AND WEEKDAY P.M. PEAK HOUR TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE 8 K NOVEMBER 1994 1376F00 qql:D • M tn 23 253 t rn re) If)N S. 124TH ST 10Tpsoni.AR 4, NORTH (NOT TO SCALE) 335 y F 265 11...14 or 18 LEGEND - TWO WAY AVERAGE WEEKDAY DAILY TRAFFIC 1995 TOTAL TRAFFIC VOLUMES WITH SITE - DAILY AND WEEKDAY P.M. PEAK HOUR TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON FIGURE n ,7 p IN NOVEMBER 1994 1376F009 42124X. CMD Fri Nov 18, 1994 09:32:47 Page 1-1 Tukwila Community Center S. 42nd Av/124th St. Intersection I S. 42nd Av/124th St. Impact Analysis Report Level 01 Service Base Del/ V/ LOS Veh C B 6.1 0.351 Future Change Del/ V/ in LOS Veh C B 6.1 0.351 + 0.000 D/V Arterial Base Future Change Trvl Avg. Trvl Avg. in Avg. Dir LOS Time Speed LOS Time Speed Speed Co rJ D 1il D o S Traffix System Version 6.6 (c) I992 DA Licensed to Kittelson & Assoc. Kittelson 6 Associates, Inc. 42124X. CMD Fri Nov 18, 1994 09:32:47 Page 2-1 Tukwila Community Center S. 42nd Av/124th St. Level Of Service Computation Report I985 NCM Operations Method Base Volume Alternative Intersection 11 S. 42nd Av/124th St. Cycle (sec) : Loss Time (sec) : Optimal Cycle: 60 Critical Vol./Cap. (X): 6 Average Delay (sec/veh): 21 Level Of Service: 0.351 6.1 B Approach: Movement: 1 North Bound L - T - R 11 Control: Permitted Rights: Include Min. Green: 0 0 Lanes: 0 0 0 0 Volume Module: Base Vol: 0 0 Growth Adj: 1.00 1.00 Initial Bse: 0 0 User Adj: 1.00 1.00 PHF Adj: 0.90 0.90 PHF Volume: 0 0 Reduct Vol: 0 0 Reduced Vol: 0 0 PCE Adj: 1.00 1.00 MLF Adj: 1.00 1.00 Final Vol.: 0 0 South Bound East Bound L - T - R 1. - T - R 11 11 Permitted Permitted Include Include 0 0 0 0 0 0 0 0 0 0 1! 0 0 0 1 0 0 0 11 11 11 0 1.00 0 1.00 0.90 0 0 0 1.00 1.00 1.00 1.00 0 133 11 120 0 50 50 215 1.00 1.00 1.00 I.00 1.00 120 0 50 50 215 1.00 1.00 1.00 1.00 1.00 0.90 0.90 0.90 0.90 0.90 133 0 56 56 239 0 0 0 0 0 133 0 56 56 239 1.00 1.00 1.00 1.00 I.00 1.00 1.00 1.00 0 56 56 239 11 Saturation Flow Module: Sat/Lane: 1800 1800 1800 1800 Adjustment: 1.00 1.00 1.00 0.84 Lanes: 0.00 0.00 0.00 0.70 Final Sat.: 0 0 0 1068 I 11 1800 1800 1800 1800 1.00 0.84 0.89 0.89 0.00 0.30 0.19 0.81 0 450 305 1302 11 Capacity Analysis Module: Vol/Sat: 0.00 0.00 0.00 0.12 0.00 0.12 0.18 0.18 Crit Moves: Green/Cycle: 0.00 0.00 0.00 0.36 Volume/Cap: 0.00 0.00 0.00 0.35 1 11 Level Of Service Module: Delay/Veh: 0.0 0.0 0.0 Delay Adj: 1.00 1.00 1.00 ProgAdjFctr: 1.00 0.85 0.85 AdjDel/Veh: 0.0 0.0 0.0 Queue: 0 0 0 0.00 0.36 0.54 0.54 0.00 0.35 0.34 0.34 11 11.0 0.0 11.0 5.9 5.9 1.00 1.00 1.00 1.00 1.00 0.85 0.85 0.85 0.85 0.85 9.4 0.0 9.4 5.0 5.0 2 0 2 3 3 0 1.00 0 1.00 0.90 0 0 0 1.00 1.00 0 11 West Bound L - T - R 1 Permitted Include 0 0 0 0 0 0 1 0 0 1.00 0 1.00 0.90 0 0 0 1.00 1.00 0 245 20 1.00 1.00 245 20 1.00 1.00 0.90 0.90 272 22 0 0 272 22 1.00 1.00 1.00 1.00 272 22 1800 1800 1800 1800 1.00 1.00 0.85 0.85 0.00 0.00 0.93 0.07 0 0 1423 115 11 ( 0.00 0.00 0.19 0.19 0.00 0.00 0.54 0.54 0.00 0.00 0.35 0.35 11 1 0.0 0.0 5.9 5.9 1.00 1.00 1.00 1.00 0.85 1.00 0.85 0.85 0.0 0.0 5.1 5.1 0 0 3 3 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. Page 1 1's 42124x.0 D ao.e ...n. e=1•11101111t Fri Nov 18, 1994 09:32:47 ?age 3-I Tukwila Community Center S. 42nd Av/124th St. Level Of Service Detailed Computation Report 1965 HCM Operations Method base Volume Alternative Intersection 11 S. 42nd Av/124th St. Approach: North Bound South Bound East Bound West Bound Movement: L- T- R L- T- R L- T- R L- T- R I 11 11 11 I RCM Ops Adjusted Lane Utilization Module: Lanes: 0 0 0 0 0 0 0 1! 0 0 0 1 0 0 0 0 0 0 1 0 Lane Group: xxxx xxxx xxxx LTR LTR LTX LT LT xxxx xxxx RT RT ILnslnGrps: 0 0 0 1 1 1 1 1 0 0 1 1 1 11 11 11 I RCM Ops Input Saturation Adj Module: Lane Width: 12 12 12 12 12 12 12 12 12 12 12 12 l Hey Veh: 0 2 8 8 Grade: 01 01 O1 01 Parking/Hr: No No No No Bus Stp/Hr: 0 0 0 0 Area Type: < < < < < < < < < < < < < < < Other > > > > > > > > > > > > > > > Cnft Ped/Hr: 0 0 0 0 ExclusiveRT: Include Include Include Include 1 RT Prtct: 0 0 0 0 1 11 I1 11 I RCM Ops f(rt) and f(lt) Adj Case Module: f(rt) Case: xxxx xxxx xxxx 7 xxxx 7 xxxx xxxx xxxx xxxx 7 7 f(lt) Case: xxxx xxxx xxxx 7 xxxx 7 7 7 xxxx xxxx xxxx xxxx I 11 11 11 1 RCM Ops Saturation Adj Module: Ln Wid Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Rev Veh Adj: xxxx xxxx xxxxx 0.99 xxxx 0.99 0.96 0.96 xxxxx xxxx 0.96 0.96 Grade Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Parking AdJ: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx I.00 1.00 Bus Stp AdJ: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Area Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 RT Adj: xxxx xxxx xxxxx 0.86 xxxx 0.86 xxxx xxxx xxxxx xxxx 0.89 0.89 LT Adj: xxxx xxxx xxxxx 0.99 xxxx 0.99 0.93 0.93 xxxxx xxxx xxxx xxxxx RCM Sat Adj: 1.00 1.00 1.00 0.84 1.00 0.84 0.89 0.89 1.00 1.00 0.85 0.85 Usr Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Sat Adj: 1.00 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 FnI Sat Adj: 1.00 1.00 1.00 0.84 1.00 0.84 0.89 0.89 1.00 1.00 0.85 0.85 -1- I1 11 11 r Progresssion Adjustment Factor Module: Signal Type: <<<<<<<< <<<<< Actuated >>>>>>>>>>>>> Volume/Cap: 0.00 0.00 0.00 0.35 0.00 0.35 0.34 0.34 0.00 0.00 0.35 0.35 ArrivalType: 3 3 3 3 ProgAdjFctr: 1.00 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 1.00 0.85 0.85 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson & Associates, Inc. Page 2 42124F.CMD Fri Nov 18, 1994 09:36:54 Page 1-1 Tukwila Community Center S. 42nd Av/124th St. Future Conditions Intersection f 1 S. 42nd Av/124th St. Impact Analysis Report Level Of Service Base Del/ V/ LOS Veh C B 7.7 0.456 Future Change Del/ V/ in LOS Veh C B 7.7 5.456 t 0.000 D/V Arterial Base Future Change Trvl Avg. Trvl Avg. in Avg. Dir LOS Time Speed LOS Time Speed Speed Traffix System Version 6.6 (c) I992 DA Licensed to Kittelson a Assoc. 42124F.CMD Fri Nov 18, 1994 09:36:54 Page 2-1 Tukwila Community Center S. 42nd Av/124th St. Future Conditions Level Of Service Computation Report 1985 HCM Operations Method Base Volume Alternative Intersection I'1 S. 42nd Av/124th St. Cycle (sec): Loss Time (sec): Optimal Cycle: 50 Critical Vol./Cap. (X): 6 Average Delay (sec/veh): 24 Level Of Service: 0.456 7. 7 B Approach: Movement: Control: Rights: Min. Green: Lanes: North Bound L - 7' - R 1 Permitted Include 0 0 0 0 0 0 South Bound East Bound West Bound L- T- R L- T- R L- T- R 11 I1 11 Permitted Include 0 0 0 0 0 0 0 1! 0 0 0 11 11 Volume Module: Base Vol: 0 0 0 223 0 Growth Adj: 1.00 I.00 1.00 1.00 1.00 Initial Bse: 0 0 0 223 0 User Adj: 1.00 1.00 1.00 1.00 1.00 PRP Adj: 0.90 0.90 0.90 0.90 0.90 PHF Volume: 0 0 0 248 0 Reduct Vol: 0 0 0 0 0 Reduced Vol: 0 0 0 248 0 PCE Adj: 1.00 1.00 1.00 1.00 1.00 MLF Adj: 1.00 1.00 1.00 1.00 1.00 Final Vol.: 0 0 0 248 0 1 11 Saturation Flow Module: Sat/Lane: 1800 1800 Adjustment: 1.00 1.00 Lanes: 0.00 0.00 Final Sat.: 0 0 1800 1800 1.00 0.81 0.00 0.81 0 1177 1 11 Capacity Analysis Module: Vol/Sat: 0.00 0.00 0.00 Crit Moves: Green/Cycle: 0.00 0.00 0.00 Volume/Cap: 0.00 0.00 0.00 1 11 Level Of Service Module: Delay/Veh: 0.0 0.0 0.0 Delay Adj: 1.00 1.00 1.00 ProgAdjFctr: 1.00 0.85 0.85 AdjDel/Veh: 0.0 0.0 0.0 Queue: 0 0 0 1800 I.00 0.00 0 53 1.00 53 1.00 0.90 59 0 59 1.00 1.00 59 Permitted Permitted Include Include 0 0 0 0 0 0 1 0 0 0 0 0 0 I 0 11 53 223 0 0 1.00 1.00 1.00 1.00 53 223 0 0 1.00 1.00 1.00 1.00 0.90 0.90 0.90 0.90 59 248 0 0 0 0 0 0 59 248 0 0 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 59 248 0 0 I1 11 1800 1800 0.81 0.87 0.19 0.19 280 302 11 1800 0.87 0.81 1270 I800 1800 1.00 1.00 0.00 0.00 0 0 11 253 1.00 253 1.00 0.90 281 0 281 1.00 1.00 28I 23 I.00 23 1.00 0.90 26 0 26 1.00 1.00 26 1800 0.85 0.92 1408 1800 0.85 0.08 130 0.21 0.00 0.21 0.20 0.20 0.00 0.00 0.20 0.20 •.•• •.r♦ 0.46 0.00 0.46 0.44 0.44 0.00 0.00 0.44 0.46 0.00 0.46 0.45 0.45 0.00 0.00 0.46 11 11 8.7 1.00 0.85 7.4 4 0.0 1.00 0.85 0.0 0 8.7 1.00 0.85 7.4 4 9.3 1.00 0.85 7. 9 4 9.3 1.00 0.85 7.9 4 0.0 0.0 1.00 1.00 0.85 1.00 0.0 0.0 0 0 9.4 1.00 0.85 8.0 4 0.44 0.46 9.4 1.00 0.85 8.0 4 ( Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson 6 Associates, Inc. Page 1 4212W. CMD Fri Nov I8, 1994 09:36:54 Page 3-1 Tukwila Community Center S. 42nd Av/124th St. Future Conditions Level Of Service Detailed Computation Report 1985 RCM Operations Method Base Volume Alternative Intersection /1 S. 42nd Av/124th St. Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L - T - R L - T - R 1 11 11 11 1 RCM Ops Adjusted Lane Utilization Module: Lanes: 0 0 0 0 0 0 0 I1 0 0 0 1 0 0 0 0 0 0 1 0 Lane Group: xxxx xxxx xxxx LTR LTR LTR LT LT xxxx xxxx RT RT ILnsInGrps: 0 0 0 1 1 1 1 1 0 0 1 1 1 11 11 11 1 RCM Ops Input Saturation Adj Module: Lane Width: 12 12 12 12 12 12 12 12 22 22 12 12 1 Rev Veh: 0 2 8 8 Grade: 01 01 Oi 01 Parking/Hr: No No No No Bus Stp/Hr: 0 0 0 0 Area Type: <<<<< << < < < < < < < < Other > > > > > > > > > > > > > > > Cnft Ped/Hr: 0 0 0 0 ExciusiveRT: Include Include Include Include 1 RT Prtct: 0 0 0 0 1 11 NCM Ops f(rt) and f(lt) Adj Case Module: 11 If 1 f(rt) Case: xxxx xxxx xxxx 7 xxxx 7 xxxx xxxx xxxx xxxx 7 7 f(lt) Case: xxxx xxxx xxxx 7 xxxx 7 7 7 xxxx xxxx xxxx xxxx 1 11 11 11 1 RCM Ops Saturation Adj Module: Ln Wid Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Rev Veh Adj: xxxx xxxx xxxxx 0.99 xxxx 0.99 0.96 0.96 xxxxx xxxx 0.96 0.96 Grade Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Parking Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Bus Stp Adj: xxxx xxxx xxxxx 1.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 Area Adj: xxxx xxxx xxxxx I.00 xxxx 1.00 1.00 1.00 xxxxx xxxx 1.00 1.00 RT Adj: xxxx xxxx xxxxx 0.87 xxxx 0.87 xxxx xxxx xxxxx xxxx 0.89. 0.89 LT Adj: xxxx xxxx xxxxx 0.94 xxxx 0.94 0.91 0.9I xxxxx xxxx xxxx xxxxx RCM Sat Adj: 1.00 1.00 1.00 0.81 1.00 0.81 0.87 0.87 1.00 1.00 0.85 0.85 Usr Sat Adj: 1.00 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 HLF Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Fnl Sat Adj: 1.00 1.00 1.00 0.81 1.00 0.81 0.87 0.87 1.00 1.00 0.85 0.85 1 11 11 11 1 Progresssion Adjustment Factor Module: Signal Type: c <<<<<<< <<<<< Actuated >>> >>>>>>>>>> Volume/Cap: 0.00 0.00 0.00 0.46 0.00 0.46 0.45 0.45 0.00 0.00 0.46 0.46 ArrivalType: 3 3 3 3 ProgAdjFctr: 1.00 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 1.00 0.85 0.85 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. Kittelson & Associates, Inc. Page 2 November 1994 Tukwila Community Center Table 6 Signal Warrant Analysis' Kittelson & Associates, Inc. 22 Traffic Impact Analysis Volume Warrant Number Met (Yes or No) Major Minor Major Minor 500 150 750 75 Hour Ending Major Street Minor Street 1 2 9 11 1 104 9 No No 2 54 4 No No 3 26 3 No No 4 36 1 No No 5 62 5 No No 6 204 22 No No 7 442 43 No No 8 569 65 No No 9 530 63 No No 10 448 69 No No 11 472 58 No No 12 503 70 No No 13 565 83 No No 14 589 96 No No + 15 665 130 No No Yes 16 937 300 Yes Yes Yes Yes 17 847 233 Yes Yes Yes 18 739 191 Yes No Yes 19 602 91 No No 20 455 55 No No 21 301 44 No No 22 261 27 No No Kittelson & Associates, Inc. 22 Traffic Impact Analysis November 1994 Tukwila Community Center Hour Ending Volume Warrant Number Met (Yes or No) Major Minor Major Minor 500 150 750 75 Major Street Minor Street 1 2 9 11 23 207 10 No No 24 162 18 No No 'Traffic Volume Source - City of Tukwila applies where the volume on the minor street is the principal reason for signal installation. Warrant 2 the interruption of continuous traffic volume warrant is also satisfied when for each of 8 hours of a day the traffic volumes as shown in Table 6 exist on both the minor and major street approach. Warrant 2 is applicable for situations where traffic volumes on the major street are so high that minor street traffic has little opportunity to enter the major street. Warrant 9 is satisfied when for each of any four hours of a day the vehicles per hour on the major street and minor street fall above graph curves shown in the MUTCD. Warrant 11 is the peak hour volume warrant and is similar to Warrant 9 in that it is satisfied when the requirements shown in the graphs are met or exceeded. Warrant 3 is the pedestrian volume warrant and is satisfied where on a major street or mid - block location, 100 or more pedestrians for each of any four hours or 190 or more pedestrians during and one hour desire to cross the intersection. The pedestrian warrant also states that there must be less than 60 gaps per hour of adequate length for the pedestrian in the traffic stream for the requirement to be met. Both existing and predicted future pedestrian volumes at the intersection do not satisfy warrant 3. Warrant 8 is the combination of warrants which states that signals may be justified where no single warrant is satisfied but where Warrants 1 and 2 are satisfied to the extent of 80 percent or more of the required volumes. For this application Warrant 8 is not met as the volumes for Warrants 1 and 2 are not 80 percent met. Warrant 10 is the peak hour delay warrant and applies where minor street traffic suffers undue delay in entering or crossing the major street. Kittelson & Associates, Inc. 23 Traffic Impact Analysis November 1994 Tukwila Community Center The Manual on Uniform Traffic Control Devices (MUTCD) recommends that a collision diagram showing accident experience by type, location, direction of movement, severity, time of day, date, and day of week for at least one year be analyzed for the purposes of determining the need for a traffic signal. Warrant 6 is satisfied when five or more accidents are reported within a 12 month period that are susceptible to correction by traffic signal control. As mentioned in the traffic safety section of this report, there has been a total of 3 reported accidents over the past 36 months thus Warrant 6 is not satisfied. As seen in Table 6, only Signal Warrants 9 and 11 are met for projected 1995 total traffic conditions at the 42nd Avenue South/South 124th Street intersection. Based on the following key points, it is concluded that a traffic signal should be installed at the 42nd Avenue South/South 124th Street intersection: 1. The signal warrant analysis suggests that a traffic signal is marginally warranted at the intersection based on the existing and projected demand at the intersection. 2. A traffic signal would offer a significant increase in the capacity of the intersection to accommodate future travel demands in the area from both passenger cars and existing and potential industrial users. 3. The less costly mitigation as shown in Figure 5 is not feasible, and as such any capacity enhancements would be difficult if not impossible to implement due to existing land use constraints. Therefore, it is recommended that a traffic signal be installed at the 42nd Avenue South/South 124th Street intersection. If a traffic signal were to be installed at the intersection of 42nd/124th Street, the proportionate fair share of the cost of the signal attributed to the Community Center needs to be determined. To determine the fair share cost, the anticipated site generated traffic was compared to the existing background traffic volumes at the intersection of 42nd Avenue/124th Street. Table 7 shows the results of the "fair share" analysis. Kittelson & Associates, Inc. 24 Traffic Impact Analysis November 1994 Tukwila Community Center Table 7 Proportionate Intersection Traffic As shown in Table 7, the proposed Tequila Community Center contributes approximately 4 percent to the overall intersection peak hour traffic volumes. Thus, based on the anticipated site generated traffic, it is concluded that the Tukwila Community Center should contribute approximately 4 percent to the overall signal installation cost at the intersection of 42nd Ave. S. /S. 124th St. It is important to note that Tukwila Community Center is proposing two main points of access; one on 42nd Avenue South, and one on South 124th Street. By virtue of the multiple access drives, the Community Center has little impact on the intersection of 42nd Avenue South/South 124th Street and thus does not in and of itself trigger the need for a traffic signal at the intersection. ALTERNATIVE MODE TRAVEL TO THE SITE Pedestrian and bicycle facilities are poor along south 124th Street in the vicinity of the site. The Allentown neighborhood does not have sidewalks and as such the only pedestrian facilities in the vicinity of the site is on 42nd Avenue South, north of South 124th Street. A four foot wide separated sidewalk is on the east side of 42nd Avenue South. South of South 124th Street on 42nd Avenue South, a six foot wide shoulder exists only on the east side of the street for bikes and pedestrians from 124th Street to the Green River Bridge. There is no shoulder on the west side of 42nd Avenue South from the Green River Bride to South 124th Street. Thus, in the vicinity of the proposed site, bicycle and pedestrian facilities are poor to average. The proposed site plan includes many elements which accommodate and promote access to the Center by pedestrians and bicyclists. The existing Metro transit stop is ideally located to provide direct access to the proposed Community Center. The proposed Community Center is located approximately 700 feet from the Duwamish/Green River Trail along 42nd Avenue Kittelson & Associates, Inc. 25 Traffic Impact Analysis Peak Hour Volume Fair Share ( %) Background (Existing) Traffic 700 96% Tukwila Community Center Generated Traffic 28 4% Total 728 100% As shown in Table 7, the proposed Tequila Community Center contributes approximately 4 percent to the overall intersection peak hour traffic volumes. Thus, based on the anticipated site generated traffic, it is concluded that the Tukwila Community Center should contribute approximately 4 percent to the overall signal installation cost at the intersection of 42nd Ave. S. /S. 124th St. It is important to note that Tukwila Community Center is proposing two main points of access; one on 42nd Avenue South, and one on South 124th Street. By virtue of the multiple access drives, the Community Center has little impact on the intersection of 42nd Avenue South/South 124th Street and thus does not in and of itself trigger the need for a traffic signal at the intersection. ALTERNATIVE MODE TRAVEL TO THE SITE Pedestrian and bicycle facilities are poor along south 124th Street in the vicinity of the site. The Allentown neighborhood does not have sidewalks and as such the only pedestrian facilities in the vicinity of the site is on 42nd Avenue South, north of South 124th Street. A four foot wide separated sidewalk is on the east side of 42nd Avenue South. South of South 124th Street on 42nd Avenue South, a six foot wide shoulder exists only on the east side of the street for bikes and pedestrians from 124th Street to the Green River Bridge. There is no shoulder on the west side of 42nd Avenue South from the Green River Bride to South 124th Street. Thus, in the vicinity of the proposed site, bicycle and pedestrian facilities are poor to average. The proposed site plan includes many elements which accommodate and promote access to the Center by pedestrians and bicyclists. The existing Metro transit stop is ideally located to provide direct access to the proposed Community Center. The proposed Community Center is located approximately 700 feet from the Duwamish/Green River Trail along 42nd Avenue Kittelson & Associates, Inc. 25 Traffic Impact Analysis November 1994 Tukwila Community Center South. However, it is important to note that despite the proposed Community Center's proximity to the Duwamish/Green River Trail, the lack of a good direct connection to the trail, narrow sidewalk on only one side the Green River Bridge, and no separate pedestrian facility on 42nd Avenue South from the bridge to South 124th Street makes the Community Center only fair to poor in terms of its location and attractiveness to pedestrians and bicyclists on the Duwamish/Green River Trail. Although no specific forecasts can be identified for those pedestrians and bicyclists on the Duwamish/Green River Trail that will divert to the proposed Community Center, it can be assumed that without improvements to the Green River Bridge and 42nd Avenue South, the numbers of pedestrians and bicyclists will likely be less than 40 to 50 bicyclists and 40 to 50 pedestrians on a weekday daily basis. Table 8 shows the typical capture radius for bicycles and pedestrians. The information in Table 8 is taken from information provided in a Bicycle Planning and Facility Workshop handbook prepared by The Traffic Institute at Northwestern University in Evanston, Illinois. Table 8 Service Area for 10 Minute Travel Time Mode Speed Capture Radius Area Bicycle 12 mph 2 miles 12.6 square miles Pedestrian 3 mph 0.5 miles 0.8 square miles The typical trip length for a recreational destination type bicycle trip is 1/4 to 2 miles. Thus, given a 2 mile trip the captive audience for the proposed Tukwila Community Center is not relatively large given that the only major neighborhood in the vicinity of the Allentown neighborhood. The pedestrian capture radius takes in approximately the Allentown neighborhood north and east of the proposed site. Based on review of the Allentown neighborhood, it is estimated that there exist approximately 225 homes in the capture radius of the proposed Tukwila Community Center. The pedestrian volume warrant states that for a pedestrian actuated signal to be warranted, "the pedestrian volumes crossing the major street at an intersection or mid -block location during an average day is: 100 or more for each of any four hours;or 190 or more during any one hour ". Also, the warrant states that, "in addition to a minimum pedestrian volumes ... there shall be less that 60 gaps per hour in the traffic stream of adequate length for pedestrians to cross during the same period when the pedestrian volume criterion is satisfied ". Based on review of the capture audience for pedestrians (225 homes) Kittelson & Associates, Inc. 26 Traffic Impact Analysis November 1994 Tukwila Community Center and the pedestrian signal warrants, it is concluded that the estimated volume of pedestrians (40 to 50) to the proposed community center is not enough to warrant a pedestrian traffic signal on either 124th Street or 42nd Avenue. Based on review the existing facilities for pedestrians and bicycles in the vicinity of the proposed site, and review of the estimated trip generation to the proposed site for alternative modes (bikes, peds), it is recommended that no significant roadway improvements be made as a direct result of the Community Center. However, it is recommended that a sidewalk be installed on the site frontage on both 124th Street and 42nd Avenue, and it is further recommended that the sidewalk be extended from the site frontage on 42nd Avenue to the Green River Bridge to facilitate safe and efficient bicycle and pedestrian access to the Duwamish/Green River Trail. Kittelson & Associates, Inc. 27 Traffic Impact Analysis November 1994 Tukwila Community Center FINDINGS AND RECOMMENDATIONS The results of the traffic impact analysis indicate that the proposed Tukwila Community Center can be developed while acceptable levels of service and safety are maintained on the surrounding street system. The analysis resulted in the following findings and recommendations: • The intersection of 42nd Avenue South and South 124th Street intersection is currently operating at level of service "F" during weekday p.m. peak hour conditions. • To mitigate the level of service deficiency at the 42nd Avenue South/South 124th Street intersection, the intersection should be signalized. The signalization will improve peak hour traffic operations from level of service "F" to "B ". • Based on existing and site generated peak hour traffic volumes, the proposed Community Center should contribute approximately 4 percent to the overall cost of the signal installation. • At full build -out, the proposed center will generate approximately 1,940 daily weekday vehicular trips, with approximately 235 vehicular trips being generated during the weekday p.m. peak hour. • A sidewalk should be extended from the site frontage on 42nd Avenue South to the Green River Bridge to provide a better connection to the Duwamish/Green River Trail. Kittelson & Associates, Inc. 28 Findings and Recommendations November 1994 Tukwila Community Center REFERENCES 1. Transportation Research Board, Highway Capacity Manual, Special Report No. 209, 1985. 2. Institute of Transportation Engineers, Trip Generation Manual, Fifth Edition, 1991. 3. Federal Highway Administration. Manual on Uniform Traffic Control Devices (MUTCD) (1988). Kittelson & Associates, Inc. 29 References • Appendix B HCM Worksheets November 1994 Tukwila Community Center APPENDIX A LEVEL OF SERVICE CONCEPT Level of Service (LOS) is a concept developed by the transportation profession to quantify the degree of comfort (including such elements as travel time, number of stops, total amount of stopped delay, and impediments caused by other vehicles) afforded to drivers as they travel through an intersection or roadway segment. As defined in the 1985 Highway Capacity Manual (Reference 1), six grades are used to denote the various LOS ranging from "A ", which indicates little, if any, vehicle delay, to "F" which indicates significant vehicle delay and traffic congestion". SIGNALIZED INTERSECTIONS Recent research has determined that average stopped delay per vehicle is the best available measure of the LOS at a signalized intersection which are described in Table A -1. Additionally, Table A -2 identifies the relationship between level of service and average stopped delay per vehicle. Using this definition, a "D" LOS is generally considered to represent the minimum acceptable design standard for signalized intersections. For signalized intersections, LOS defines the quality of the traffic flow, but does not necessarily describe the overall design adequacy of the intersection to accommodate the traffic volumes being analyzed. As an example, a good LOS can be achieved even when the volume /capacity ratio for the intersection exceeds 1.0. Similarly, there are conditions under which a poor LOS is achieved even though the volume /capacity ratio for the intersection is well below 1.0. Therefore, all signalized intersection summary tables contained in this report provide both the calculated LOS and the calculated volume /capacity ratio for each intersection. In this way, the reader is provided with a complete description of the expected operating conditions for each signalized intersection that was analyzed. UNSIGNALIZED INTERSECTIONS The calculation of LOS at an unsignalized intersection requires a different approach. The 1985 Highway Capacity Manual includes a method for calculating the LOS at two -way stop- "Most of the material in this appendix is adapted from the Transportation Research Board, Highway Capacity Manual, Special Report 209 (1985). Kittelson & Associates, Inc. 1 Appendix A November 1994 Tukwila Community Center controlled intersections. For these unsignalized intersections, LOS is defined differently than for signalized intersections in that it is based upon the concept of "Reserve Capacity" (i.e., that portion of available hourly capacity that is not used). A qualitative description of the various service levels associated with an unsignalized intersection is presented in Table A -3. A quantitative definition of LOS for an unsignalized intersection is presented in Table A -4. The reserve capacity concept applies only to an individual traffic movement or to shared lane movements. Once the capacity of all the individual movements has been calculated and their LOS and expected delays determined, an overall evaluation of the intersection can be made. Normally, the movement having the worst LOS defines the overall evaluation, but this may be tempered by engineering judgement. An "E" LOS is generally considered to represent the minimum acceptable design standard. Past experience with the unsignalized analysis procedure indicates this methodology is very conservative in that it tends to overestimate the magnitude of any potential problems that might exist. This is especially true for minor street left turn movements. For example, the Highway Capacity Manual methodology does not take into account the effects of vehicle flow platoons that result from upstream signalization. Vehicles traveling in platoons tend to create greater gaps in the traffic flow that sometimes provide additional capacity for the side closest to the signal. Therefore, the results of any unsignalized intersection analysis should be reviewed with this thought in mind. Generally, LOS E for the minor street left turn movement is considered to be acceptable for an unsignalized intersection although it also indicates that the need for signalization should be investigated. All LOS analyses described in this report were performed in accordance with the procedures described above. Copies of the analysis forms are contained in Appendix B . As a final note, the HCM analysis procedures are based upon worst case conditions, the peak 15 minute period flow rate during the morning and evening peak hours was used in the evaluation of all intersection levels of service. Thus, the analysis reflects conditions that are only likely to occur for 15 minutes out of each average weekday. For the remainder of each weekday and throughout the weekends, traffic conditions within the study impact area are likely to be better than that described in this report. Kittelson & Associates, Inc. 2 Appendix A November 1994 Tukwila Community Center ALL -WAY STOP CONTROLLED INTERSECTIONSA2 There is not accepted procedure for a level of service analysis of an all -way stop controlled intersection. The procedure used for determining LOS for a four -way or three -way stop controlled intersection differs from that described for unsignalized intersections. This methodology, which is being reviewed y the Unsignalized Intersection Committee of the Transportation Research Board, uses a capacity estimation method based on headways observed at all -way stop controlled intersections in the western United States. The procedure incorporate several important variables, including volumes distribution, number of lanes on each approach, and the percentage of right and left turns at the intersection. Intersection performance is measured in parameters similar to signalized intersections; delay, volume -to- capacity ration, and Level of Service using a scale of "A" through "F ". Approach delay on any given leg of the intersection is calculated using the following equation: D = exp(3.8xc) Where D = vehicle delay on a given approach (sec/veh) SV = subject approach volume (vph) C = calculated approach capacity (vph) exp = base of natural logarithms In this equation, the quantity SV /C is simply the volume -to capacity ration on the approach under consideration. Table A -5 presents the LOS criteria for all-way stop controlled intersection. "Kyte, Michael, Estimating Capacity and Delay at an All -Way Stop - Controlled Intersection. University of Idaho, Department of Civil Engineering Research Report, September 1989. Kittelson & Associates, Inc. 3 Appendix A November 1994 Tukwila Community Center Table A -1 - General Level Of Service Description For Signalized Intersections Level -of- Service Traffic Flow Characteristics A Very low average stopped delay, less than five seconds per vehicle. This occurs when progression is extremely favorable, and most vehicles arrive during the green phase. Most vehicles do not stop at all. Short cycle lengths may also contribute to low delay. B Average stop delay is in the range of 5.1 to 15.0 seconds per vehicle. This generally occurs with good progression and/or short cycle lengths. More vehicles stop than for LOS A, causing higher levels of average delay. C Average stopped delay is in the range of 15.1 to 25.0 seconds per vehicle. These higher delays may result from fair progression and/or longer cycle lengths. Individual cycle failures may begin to appear in this level. The number of vehicles stopping is significant at this level, although many still pass through the intersection without stopping. D Average stopped delays are in the range of 25.1 to 40.0 seconds per vehicle. The influence of congestion becomes more noticeable. Longer delays may result from some combination of unfavorable progression, long cycle length, or high volume /capacity ratios. Many vehicles stop, and the proportion of vehicles not stopping declines. Individual cycle failures are noticeable. E Average stopped delays are in the range of 40.1 to 60.0 seconds per vehicle. This is considered to be the limit of acceptable delay. These high delay values generally indicate poor progression, long cycle lengths, and high volume/capacity ratios. Individual cycle failures are frequent occurrences. F Average stop delay is in excess of 60 seconds per vehicle. This is considered to be unacceptable to most drivers. This condition often occurs with oversaturation. It may also occur at high volume /capacity ratios below 1.00 with many individual cycle failures. Poor progression and long cycle lengths may also be major contributing causes to such high delay levels. Note: A signal cycle failure is considered to occur when one or more vehicles are forced to wait through more than one green signal indication for a particular approach. Kittelson & Associates, Inc. 4 Appendix A . Tukwila Community Center Table A -2 - Level Of Service Criteria For Signalized Intersections Table A -3 Level -of- Service Stopped Delay per Vehicle (Sec) A <= 5.0 B 5.1 to 15.0 C 15.1 to 25.0 D 25.1 to 40.0 E 40.0 to 60.0 F > 60.0 Source: Transportation Research Board. Highway Capacity Manual. Special Report 209 (1985) Level of Service Criteria (All-Way Stop Controlled Intersections) Level of Service Average Delay per Vehicle to Minor Street Traffic A < 5 seconds B 5 to 10 seconds C 10 to 20 seconds D 20 to 30 seconds E 30 to 45 seconds F > 45 seconds Source: Kyte, Michael. Estimating the Capacity of an All -Way Stop - Controlled Intersection, University of Idaho. (January 1990) Kittelson & Associates, Inc. 5 Appendix A November 1994 Tukwila Community Center Table A-4 General Level Of Service Descriptions For Unsignalized Intersections LOS General Description A - Average delay per vehicle ranges between 0 and 10 seconds - Nearly all drivers find freedom of operation - Very seldom is there more than one vehicle in the queue B - Average delay per vehicle ranges between 10 and 20 seconds - Some drivers begin to consider the delay an inconvenience - Occasionally there is more than one vehicle in the queue C - Average delay per vehicle ranges between 20 and 30 seconds - Many times there is more than one vehicle in the queue - Most drivers feel restricted, but not objectionably so D - Average delay per vehicle ranges between 30 and 40 seconds - Often there is more than one vehicle in the queue - Drivers feel quite restricted E - Represents a condition in which the demand is near or equal to the probable maximum number of vehicles that can be accommodated by the movement - Average delay per vehicle ranges between 40 and 60 seconds - There is almost always more than one vehicle in the queue - Drivers find the delays to be approaching intolerable levels F - Forced flow - Represents an intersection failure condition that is caused by geometric and/or operational constraints external to the intersection Kittelson & Associates, Inc. 6 Appendix A November 1994 Tukwila Community Center Table A -5 - Level Of Service Criteria For Unsignalized Intersections Reserve Capacity (pcph) Level of Service Expected Delay to Minor Street Traffic > 400 A Little or no delay 300 -399 B Short traffic delays 200 -299 C Average traffic delays 100 -199 D Long traffic delays 0 -99 E Very long traffic delays * F * * When demand volume exceeds the capacity of the lane, extreme delays will be encountered with queuing which may cause severe congestion affecting other traffic movements in the intersection. This condition usually warrants improvement to the intersection. Kittelson & Associates, Inc. 7 Appendix A BEM ONESI ME MEE MMMM ■ Appendix A < Level of Service Concept 1376FUT2.CMD Fri Nov 18, 1994 09:52:18 Page 2 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Trip Distribution Report Percent Of Trips new Rate Rate Trips Trips Total i Of To Gates In Out In Out Trips Total 1 2 3 4 1 center 100.00 Comm. Center 1.20 1.15 120 115 235 100.0 Zone 1 Subtotal 120 115 235 100.0 TOTAL 120 115 235 100.0 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Zone 1 15.0 5.0 45.0 35.0 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson ".s Associates, Inc. Page 1 1376FUT2.CMD Fri Nov 18, 1994 09 :52:18 Page 3 -1 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 4 -I Tukwila Community Center - 1376 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Traffic conditions with Proposed Center (w/ fields) Turning Movement Report Impact Analysis Report Level Of Service Volume Northbound Southbound Eastbound Westbound Total Type Left Thru Right Left Thru Right Left Thru Right Left Thru Right Volume I2 S42nd Av /124th Base 0 50 215 120 50 0 0 0 0 245 0 20 700 Added 0 3 8 3 3 0 0 0 0 8 0 3 28 Total 0 53 223 123 53 0 0 0 0 253 0 23 728 04 S. 124th St. /Site Access Base 0 0 0 0 0 0 0 335 0 0 265 0 600 Added 11 0 17 0 0 0 0 0 11 18 0 0 58 Total 11 0 17 0 0 0 0 335 11 18 265 0 658 I7 Interstate /S142nd Base 25 165 150 15 230 15 10 85 15 140 I25 15 990 Added 0 0 42 0 0 0 0 54 0 40 52 0 188 Total 25 165 192 I5 230 15 10 139 15 190 177 15 1178 012 42nd Ave S. /Site Access Base 0 265 0 0 295 0 0 0 0 0 0 0 560 Added 0 8 88 3 8 0 0 0 0 84 0 3 194 Total 0 273 88 3 303 0 0 0 0 84 0 3 754 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. Intersection 2 S42nd Av /124th 4 S. 124th St. /Site Access f 7 Interstate /S142nd 12 42nd Ave S. /Site Access Base Future Change Del/ V/ Del/ V/ in LOS Veh C LOS Veh C F OVRFL 1.456 F OVRFL 1.460 + 0.004 V/C A xxxxx 0.000 A xxxxx 0.000 + 0.000 V/C C 16.0 0.461 C 18.2 0.585 t 2.163 D/V A xxxxx 0.000 8 xxxxx 0.000 + 0.000 V/C Arterial Base Future Change Trvl Avg. Trvl Avg. in Avg. Dir LOS Time Speed 1,0S Time Speed Speed Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson & Associates, Inc. Page 2 I376FUT2.CMD Fri Nov 18, 1994 09 :52:20 Page 5 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 4 -Way Stop Method Base Volume Alternative Intersection 12 S42nd Av /124th Cycle (sec) : Loss Time (sec): Optimal Cycle: 1 0 0 Critical Vol. /Cap. (X): Average Delay (sec /veh): Level Of Service: I.456 OVERFLOW F Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L - T - R L - T - R - - - -1 11 11 1! I Control: Stop Sign Stop Sign Stop Sign Stop Sign Rights: Include Include Include Include Lanes: 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 1! 0 0 - -1 11 11 11 1 Volume Module: Base Vol: 0 50 215 120 50 0 0 0 0 245 0 20 Growth Adj: 1.00 1.00 1.00 1.00 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 0 50 215 120 50 0 0 0 0 245 0 20 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 0 50 215 120 50 0 0 0 0 245 0 20 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Reduced Vol: 0 50 215 120 50 0 0 0 0 245 0 20 PCE Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Final Vol.: 0 50 215 120 50 0 0 0 0 245 0 20 1 11 11 11 1 Saturation Flow Module: Sat /Lane: I82 182 182 515 515 515 0 0 0 644 644 644 Adjustment: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Lanes: 0.00 0.19 0.81 0.71 0.29 0.00 0.00 0.00 0.00 0.92 0.00 0.08 Final Sat.: 0 34 148 364 151 0 0 0 0 595 0 49 1- 11 11 11 1 Capacity Analysis Module: Vol /Sat: 0.00 1.46 1.46 0.33 0.33 0.00 0.00 0.00 0.00 0.41 0.00 0.41 Crit Moves: •t*• f.ea •aif **ft I 11 11 11 1 Level Of Service Module: Delay /Veh: 1.0 253 252.9 3.5 3.5 1.0 1.0 1.0 1.0 4.8 1.0 4.8 Delay Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 AdjDel /Veh: 1.0 253 252.9 3.5 3.5 1.0 1.0 1.0 1.0 4.8 1.0 4.8 Queue: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 6 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 4 -Way Stop Method Future Volume Alternative Intersection 12 S42nd Av /124th Cycle (sec): Loss Time (sec) : Optimal Cycle: 0 0 Critical Vol. /Cap. (X): Average Delay (sec /veh): Level Of Service: 1.460 OVERFLOW F Approach: North Bound South Bound East Bound West Bound Movement: L- T- R L - T - R L - T - R L - T - R 1 11 11 11 1 Control: Stop Sign Stop Sign Stop Sign Stop Sign Rights: Include Include Include Include Lanes: 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 1! 0 0 1 11 11 (1 1 Volume Module: Base Vol: 0 50 215 120 50 0 0 0 0 245 0 20 Growth Adj: 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 0 50 215 120 50 0 0 0 0 245 0 20 Added Vol: 0 3 8 3 3 0 0 0 0 8 0 3 Initial Fut: 0 53 223 123 53 0 0 0 0 253 0 23 User Adj: 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PBF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 0 53 223 123 53 0 0 0 0 253 0 23 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Reduced Vol: 0 53 223 123 53 0 0 0 0 253 0 23 PCE Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Final Vol.: 0 53 223 123 53 0 0 0 0 253 0 23 1 11 11 11 1 Saturation Flow Module: Sat /Lane: 189 189 189 519 519 519 0 0 0 646 646 646 Adjustment: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Lanes: 0.00 0.19 0.81 0.70 0.30 0.00 0.00 0.00 0.00 0.92 0.00 0.08 Final Sat.: 0 36 153 363 156 0 0 0 0 592 0 54 I 11 11 11 1 Capacity Analysis Module: Vol /Sat: 0.00 1.46 1.46 0.34 0.34 0.00 0.00 0.00 0.00 0.43 0.00 0.43 Crit Moves: •*** ,•.. • ■f! *ft* 1 11 /1 11 1 Level Of Service Module: Delay /Veh: 1.0 257 257.0 3.6 3.6 1.0 1.0 1.0 1.0 5.1 1.0 5.1 Delay Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 AdjDel /Veh: 1.0 257 257.0 3.6 3.6 1.0 1.0 1.0 1.0 5.1 1.0 5.I Queue: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson 6 Associates, Inc. Page 3 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 7 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 HCM Unsignalized Method Base Volume Alternative Intersection /4 S. I24th St. /Site Access Level Of Service: A Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L - T - R L - T - R ----- - - - - -1 11 11 - - - -11 1 Control: Stop Sign Stop Sign Uncontrolled Uncontrolled Rights: Include Include Include Include Lanes: 0 0 1! 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 --- - - - -11 11 11 1 Volume Module: Base Vol: 0 0 0 0 0 0 0 335 0 0 265 0 Growth Adj: 1.00 1.00 1.00 I.00 1.00 1.00 I.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 0 0 0 0 0 0 0 335 0 0 265 0 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PRF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 2.00 1.00 1.00 PHF Volume: 0 0 0 0 0 0 0 335 0 0 265 0 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Final Vol.: 0 0 0 0 0 0 0 335 0 0 265 0 --------- 1-------- - - - -11 11 -- 11 1 Adjusted Volume Module: Grade: Of 00 01 00 t Cycle /Cars: xxxx xxxx xxxx xxxx 0.00 0.92 0.00 0.92 0 Truck /Comb: xxxx xxxx xxxx xxxx 0.06 0.02 0.06 0.02 PCE Adj: 1.10 1.10 1.10 1.10 1.20 1.10 xxxx 1.00 1.00 xxxx 1.00 1.00 Cycl /Car PCE: xxxx xxxx xxxx xxxx 0.50 1.00 0.50 1.00 Trck /Cmb PCE: xxxx xxxx xxxx xxxx 1.50 2.00 1.50 2.00 Adj Vol.: 0 0 0 0 0 0 0 335 0 0 265 0 - 1- 11 11 11 1 Critical Gap Module: » Population: 10000000 c< » Run Speed(E /W): 30 MPH « RT Rad /Ang: 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg Critical Gp: 6.0 5.5 5.0 6.0 5.5 5.0 4.5 xxxx xxxxx 4.5 xxxx xxxxx -- - - - -1- - - - -11 11 11 - - -1 Capacity Module: Cnflict Vol: 600 600 335 600 600 265 265 xxxx xxxxx 335 xxxx xxxxx Potent Cap.: 475 550 859 475 550 925 1000 xxxx xxxxx 962 xxxx xxxxx 0 Used Cap.: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 xxxx xxxxx 0.0 xxxx xxxxx Impedance: xxxx 1.00 1.00 xxxx 1.00 1.00 1.00 xxxx xxxxx 1.00 xxxx xxxxx Actual Cap.: 475 550 859 475 550 925 1000 xxxx xxxxx 962 xxxx xxxxx ------- 1------ - - - -11 -11 - - - -11 1 Level Of Service Module: Unused Cap.: 475 550 859 475 550 925 1000 xxxx xxxxx 962 xxxx xxxxx LOS by Move: • • • • • • • • • * • Movement: LT - LTR - RT LT - LTR - RT LT - LTR - RT LT - LTR - RT Shared Cap.: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Unused Cap.: xxxx 0 xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Shared LOS: • • • • • • ► • f f f f Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 8 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 HCM Unsignalized Method Future Volume Alternative Intersection i4 S. 124th St. /Site Access Level Of Service: A Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L- T - R L - T - R 1 11 11 11 1 Control: Stop Sign Stop Sign Uncontrolled Uncontrolled Rights: Include Include Include Include Lanes: 0 0 1! 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 11 11 11 1 Volume Module: Base Vol: 0 0 0 0 0 0 0 335 0 0 265 0 Growth Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 0 0 0 0 0 0 0 335 0 0 265 0 Added Vol: 11 0 17 0 0 0 0 0 11 18 0 0 Initial Fut: 11 0 17 0 0 0 0 335 11 18 265 0 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 11 0 17 0 0 0 0 335 11 18 265 0 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Final Vol.: 11 0 17 0 0 0 0 335 11 18 265 0 Adjusted Volume Module: Grade: 00 00 00 00 0 Cycle /Cars: xxxx xxxx xxxx xxxx 0.00 0.92 0.00 0.92 0 Truck /Comb: xxxx xxxx xxxx xxxx 0.06 0.02 0.06 0.02 PCE Adj: 1.10 1.I0 1.10 1.10 1.10 1.10 xxxx 1.00 1.00 xxxx 1.00 1.00 Cycl/Car PCE: xxxx xxxx xxxx xxxx 0.50 1.00 0.50 1.00 Trck /Cmb PCE: xxxx xxxx xxxx xxxx 1.50 2.00 1.50 2.00 Adj Vol.: 12 0 19 0 0 0 0 335 11 19 265 0 Critical Gap Module: » Population: 10000000 « » Run Speed(E/W): 30 MPH « RT Rad /Ang: 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg Critical Gp: 6.0 5.5 5.0 6.0 5.5 5.0 4.5 xxxx xxxxx 4.5 xxxx xxxxx - -1 it 11 11 1 Capacity Module: Cnflict Vol: 624 624 341 647 629 265 265 xxxx xxxxx 346 xxxx xxxxx Potent Cap.: 461 536 853 447 532 925 1000 xxxx xxxxx 949 xxxx xxxxx 0 Used Cap.: 2.6 0.0 2.2 0.0 0.0 0.0 0.0 xxxx xxxxx 2.0 xxxx xxxxx Impedance: xxxx 1.00 0.99 xxxx 1.00 1.00 1.00 xxxx xxxxx 0.99 xxxx xxxxx Actual Cap.: 455 529 853 436 526 925 1000 xxxx xxxxx 949 xxxx xxxxx ----- - - - - -1 11 11 11 1 Level Of Service Module: Unused Cap.: 443 529 834 436 526 925 1000 xxxx xxxxx 930 xxxx xxxxx LOS by Move: • • • • • • • • • A • • Movement: LT - LTR - RT LT - LTR - RT LT - LTR - RT LT - LTR - RT Shared Cap.: xxxx 637 xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Unused Cap.: xxxx 606 xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Shared LOS: • A • • • • * f • * f • Traffix System Version 6.6 (c) 1992 DA Licensed to KitteIson 6 Assoc. Kittelson G Associates, Inc. Page 4 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 9 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 RCM Operations Method Base Volume Alternative Intersection 17 Interstate /S142nd Cycle (sec): Loss Time (sec): Optimal Cycle: 85 Critical Vol. /Cap. (X): 12 Average Delay (sec /veh): 38 Level Of Service: 0.461 16.0 C Approach: North Bound South Bound East Bound West Bound Movement: L- T- R L - T- R L - T- R L - T- R 1 11 11 11 I Control: Protected Protected Split Phase Split Phase Rights: Include Include Include Include Min. Green: 0 0 0 0 0 0 0 0 0 0 0 0 Lanes: 1 0 1 0 1 1 0 0 1 0 1 0 I 0 1 0 0 1! 0 0 I II (1 11 I Volume Module: Base Vol: 25 165 150 15 230 15 10 85 15 140 125 15 Growth Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 25 165 150 15 230 15 10 85 15 140 125 15 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 25 165 150 15 230 15 10 85 15 140 125 15 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Reduced Vol: 25 165 150 15 230 15 10 85 15 140 125 15 PCE Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Final Vol.: 25 165 150 15 230 15 10 85 15 140 125 15 1 1! 11 11 I Saturation Flow Module: Sat /Lane: 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 Adjustment: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 0.85 0.79 0.79 0.79 Lanes: 1.00 1.00 1.00 1.00 0.94 0.06 1.00 1.00 1.00 0.50 0.45 0.05 Final Sat.: 1710 1800 1530 1710 1673 109 1710 1800 1530 713 637 76 1 11 11 I! ! Capacity Analysis Module: Vol /Sat: 0.01 0.09 0.10 0.01 0.14 0.14 0.01 0.05 0.01 0.20 0.20 0.20 Crit Moves: "••• .... .... .... Green /Cycle: 0.03 0.30 0.30 0.03 0.30 0.30 0.20 0.10 0.10 0.43 0.43 0.43 Volume /Cap: 0.46 0.30 0.32 0.32 0.46 0.46 0.06 0.46 0.10 0.46 0.46 0.46 1 -- 11 -1) 11 I Level Of Service Module: Delay /Veh: 34.9 17.4 17.5 32.3 18.9 18.9 26.2 28.6 26.3 13.6 13.6 13.6 Delay Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ProgAdjFctr: 1.00 0.85 0.85 1.00 0.85 0.85 1.00 0.85 0.85 0.85 0.85 0.85 AdjDel /Veh: 34.9 14.8 14.9 32.3 16.1 16.1 26.2 24.3 22.3 11.6 11.6 11.6 Queue: 1 3 3 0 5 5 0 2 0 5 5 5 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 10 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Detailed Computation Report I985 HCM Operations Method Base Volume Alternative Intersection 17 Interstate /S142nd Approach: North Bound South Bound East Bound Movement: L - T - R L- T - R L- T - R I 11 1! HCM Ops Adjusted Lane Utilization Module: Lanes: 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 Lane Group: L T R L RT RT L T R ILnslnGrps: 1 1 1 1 1 1 1 1 1 I 11 11 HCM Ops Input Saturation Adj Module: Lane Width: 12 12 I2 12 12 12 $ Hey Veh: 0 0 Grade: 08 08 Parking /Hr: No No 12 12 0 03 No 11 West Bound L - T - R 1 0 0 1! 0 0 LTR LTR 1.TR 1 1 1 !1 1 12 12 12 12 0 08 No Bus Stp /Hr: 0 0 0 0 > > > > > > > > > > > > O 0 de Include O 0 11 I Area Type: < < < < < < < < < < < < < < < Other > > > Cnft Ped /Hr: 0 0 ExcIusiveRT: Include Include Inclu * RT Prtct: 0 0 1 11 11 HCM Ops f(rt) and f(lt) Adj Case Module: f(rt) Case: xxxx xxxx 2 xxxx 5 5 xxxx xxxx f(lt) Case: 1 xxxx xxxx 1 xxxx xxxx 1 xxxx 1 11 11 HCM Ops Saturation Adj Module: Ln Wid Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Nev Veh Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Grade Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Parking Adj: xxxx xxxx 1.00 xxxx 1.00 1.00 xxxx xxxx Bus Stp Adj: xxxx xxxx 1.00 xxxx 1.00 1.00 xxxx xxxx Area Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 RT Adj: xxxx xxxx 0.85 xxxx 0.99 0.99 xxxx xxxx LT Adj: 0.95 xxxx xxxxx 0.95 xxxx xxxxx 0.95 xxxx HCM Sat Adj: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 Usr Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Fnl Sat Adj: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 - - - -I II I( Progresssion Adjustment Factor Module: Signal Type: < <<<<<<<< << << Actuated > Volume /Cap: 0.46 0.30 0.32 0.32 0.46 0.46 0.06 0.46 ArrivalType: 3 3 ProgAdjFctr: 1.00 0.85 0.85 1.00 0.85 0.85 1.00 0.85 2 7 7 7 xxxx 7 7 7 1l 1 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.85 0.89 0.89 0.89 xxxxx 0.89 0.89 0.89 0.85 0.79 0.79 0.79 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 0.85 0.79 0.79 0.79 II 1 > > > > > > > > > > > > 0.10 0.46 0.46 0.46 3 3 0.85 0.85 0.85 0.85 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson 6 Assoc. Kittelson 6 Associates, Inc. Page 5 1376FUT2.CMD Fri Nov 18, 1994 09:52:20 Page 11 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 HCM Operations Method Future Volume Alternative Intersection 17 Interstate /SI42nd Cycle (sec): Loss Time (sec): Optimal Cycle: 85 Critical Vol. /Cap. (X): 12 Average Delay (sec /veh): 46 Level Of Service: 0.585 18.2 C Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L- T - R L - T - R 1 11 11 11 l Control: Protected Protected Split Phase Split Phase Rights: Include Include Include Include Min. Green: 0 0 0 0 0 0 0 0 0 0 0 0 Lanes: 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 0 1! 0 0 1 11 11 11 1 Volume Module: Base Vol: 25 165 150 15 230 15 10 85 25 140 125 15 Growth Adj: I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 I.00 1.00 1.00 Initial Bse: 25 165 150 15 230 15 10 85 15 140 125 15 Added Vol: 0 0 42 0 0 0 0 54 0 40 52 0 Initial Fut: 25 165 192 15 230 15 10 139 15 180 177 15 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 25 165 192 15 230 15 10 139 15 180 177 15 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Reduced Vol: 25 165 192 15 230 15 10 139 15 180 177 15 PCE Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Final Vol.: 25 165 192 15 230 15 10 139 15 180 177 15 ----- --- - -1 11 11 11 1 Saturation Flow Module: Sat /Lane: 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 Adjustment: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 0.85 0.76 0.76 0.76 Lanes: 1.00 1.00 1.00 1.00 0.94 0.06 1.00 1.00 1.00 0.48 0.48 0.04 Final Sat.: 1710 1800 1530 1710 1673 109 1710 1800 1530 659 648 55 ---- - - -- -1 - - - -11 11 11 1 Capacity Analysis Module: Vol /Sat: 0.01 0.09 0.13 0.01 0.14 0.14 0.01 0.08 0.01 0.27 0.27 0.27 Crit Moves: tttt ttt♦ Mil tttt Green /Cycle: 0.02 0.24 0.24 0.02 0.23 0.23 0.13 0.13 0.13 0.47 0.47 0.47 Volume /Cap: 0.59 0.38 0.52 0.52 0.59 0.59 0.04 0.59 0.07 0.59 0.59 0.59 --- - - - - -1 11 11 11 1 Level Of Service Module: Delay /Veh: 43.6 20.6 22.2 42.4 23.5 23.5 24.5 29.0 24.6 13.7 13.7 13.7 Delay Adj: 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ProgAdjFctr: 1.00 0.85 0.85 1.00 0.85 0.85 1.00 0.85 0.85 0.85 0.85 0.85 AdjDel /Veh: 43.6 17.6 18.9 42.4 19.9 19.9 24.5 24.7 20.9 11.6 11.6 11.6 Queue: 1 3 4 0 5 5 0 3 0 7 7 7 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. 1376FUT2. CMD Fri Nov 18, 1994 09:52:20 Page 12 -I Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Detailed Computation Report 1985 HCM Operations Method Future Volume Alternative Intersection 17 Interstate /S142nd Approach: North Bound South Bound East Bound West Bound Movement: L - T - R L - T - R L - T - R L - T - R - - - -1 11 11 1! 1 HCM Ops Adjusted Lane Utilization Module: Lanes: 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 0 1! 0 0 Lane Group: L T R L RT RT L T R LTR LTR LTR ILnslnGrps: 1 1 1 1 1 1 1 1 1 1 1 1 1 11 11 11 1 RCM Ops Input Saturation Adj Module: Lane Width: 12 22 12 12 12 12 I2 12 12 12 12 12 IF Rev Veh: 0 0 0 0 Grade: 0% 0% 0% O% Parking /Hr: No No No No Bus Stp /Hr: 0 0 0 0 Area Type: < < < < < < < < < < < < < < < Other > > > > > > > > > > > > > > > Cnft Ped /Hr: 0 0 0 0 ExclusiveRT: Include Include Include Include t RT Prtct: 0 0 0 0 1 11 11 11 1 HCM Ops f(rt) and f(lt) Adj Case Module: f(rt) Case: xxxx xxxx 2 xxxx 5 5 xxxx xxxx 2 7 7 7 f(lt) Case: 1 xxxx xxxx 1 xxxx xxxx 1 xxxx xxxx 7 7 7 1 11 11 II 1 HCM Ops Saturation Adj Module: Ln Wid Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 I.00 1.00 1.00 1.00 1.00 Hev Veh Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Grade Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Parking Adj: xxxx xxxx 1.00 xxxx 1.00 1.00 xxxx xxxx 1.00 1.00 1.00 1.00 Bus Stp Adj: xxxx xxxx 1.00 xxxx 1.00 1.00 xxxx xxxx 1.00 1.00 I.00 1.00 Area Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 RT Adj: xxxx xxxx 0.85 xxxx 0.99 0.99 xxxx xxxx 0.85 0.89 0.89 0.89 LT Adj: 0.95 xxxx xxxxx 0.95 xxxx xxxxx 0.95 xxxx xxxxx 0.85 0.85 0.85 HCM Sat Adj: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 0.85 0.76 0.76 0.76 Usr Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 MLF Sat Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Fnl Sat Adj: 0.95 1.00 0.85 0.95 0.99 0.99 0.95 1.00 0.85 0.76 0.76 0.76 1 11 11 11 1 Progresssion Adjustment Factor Module: Signal Type: <<C <<<<<< < <<< Actuated > >>>> >> >>>>>> Volume /Cap: 0.59 0.38 0.52 0.52 0.59 0.59 0.04 0.59 0.07 0.59 0.59 0.59 ArrivalType: 3 3 3 3 ProgAdjFctr: 1.00 0.85 0.85 1.00 0.85 0.85 1.00 0.85 0.85 0.85 0.85 0.85 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. Kittelson 6 Associates, Inc. Page 6 1376FUT2.CMD Fri Nov 18, 1994 09:52 :20 Page 13 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 HCM Unsignalized Method Base Volume Alternative Intersection 112 42nd Ave S. /Site Access Level Of Service: A Approach: Movement: Control: Rights: Lanes: North Bound South Bound East Bound West Bound L - T- R L- T - R L- T- R L- T- R 1 11 11 11 I Uncontrolled Uncontrolled Stop Sign Stop Sign Include Include Include Include O 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 11 0 0 11 11 11 I Volume Module: Base Vol: Growth Adj: 1.0 Initial Bse: User Adj: 1.0 PHF Adj: 1.0 PHF Volume: Reduct Vol: Final Vol.: I Adjusted Volume Module: Grade: 00 06 01 03 1 Cycle /Cars: 0.00 0.92 0.00 0.92 xxxx xxxx xxxx xxxx 1 Truck /Comb: 0.06 0.02 0.06 0.02 xxxx xxxx xxxx xxxx PCE Adj: xxxx 1.00 1.00 xxxx 1.00 1.00 1.10 1.10 1.10 1.10 1.10 1.10 Cycl /Car PCE: 0.50 1.00 0.50 1.00 xxxx xxxx xxxx xxxx Trck /Cmb PCE: 1.50 2.00 1.50 2.00 xxxx xxxx xxxx xxxx Adj Vol.: 0 265 0 0 295 0 0 0 0 0 0 0 I I1 11 11 1 Critical Gap Module: » Population: 10000000 « » Run Speed(N /S): 30 MPH « RT Rad /Ang: 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg Critical Gp: 4.5 xxxx xxxxx 4.5 xxxx xxxxx 6.0 5.5 5.0 6.0 5.5 5.0 1 11 11 11 I Capacity Module: Cnflict Vol: 295 xxxx xxxxx 265 xxxx xxxxx 560 560 295 560 560 265 Potent Cap.: 1000 xxxx xxxxx 1000 xxxx xxxxx 503 578 895 503 578 925 I Used Cap.: 0.0 xxxx xxxxx 0.0 xxxx xxxxx 0.0 0.0 0.0 0.0 0.0 0.0 Impedance: 1.00 xxxx xxxxx 1.00 xxxx xxxxx xxxx 1.00 1.00 xxxx 1.00 1.00 Actual Cap.: 1000 xxxx xxxxx 1000 xxxx xxxxx 503 578 895 503 578 925 I------- - - - -11 11 - - -- II- -I Level Of Service Module: Unused Cap.: 1000 xxxx xxxxx 1000 xxxx xxxxx 503 578 895 503 578 925 LOS by Move: • • • • • • • • • • • • Movement: LT - LTR - RT LT - LTR - RT LT - LTR - RT LT - LTR - RT Shared Cap.: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx Unused Cap.: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx 0 xxxxx Shared LOS: • • • • • • • • • • • 265 0 0 295 0 1.00 1.00 1.00 1.00 1.00 1.0 265 0 0 295 0 1.00 1.00 1.00 1.00 1.00 1.0 1.00 1.00 1.00 1.00 1.00 1.0 265 0 0 295 0 0 0 0 0 0 265 0 0 295 0 11 11 1.0 I.0 1.0 0 1.00 1.0 0 1.00 1.0 1.00 1.0 0 0 0 11 1.0 1.0 1.0 0 1.00 0 1.00 1.00 0 0 0 Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. 1376FUT2.CMD Fri Nov I8, 1994 09:52:20 Page 14 -1 Tukwila Community Center - 1376 Traffic conditions with Proposed Center (w/ fields) Level Of Service Computation Report 1985 HCM Unsignalized Method Future Volume Alternative Intersection 112 42nd Ave S. /Site Access Level Of Service: B Approach: Movement: Control: Rights: Lanes: 1 Volume Module: North Bound South Bound East Bound West Bound L - T- R L- T- R L- T- R L- T- R 11 11 11 1 Uncontrolled Uncontrolled Stop Sign Stop Sign Include Include Include Include O 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 11 0 0 11 11 11 1 Base Vol: 0 265 0 0 295 0 0 0 0 0 0 0 Growth Adj: 1.00 1.00 1.00 1.00 1.00 I.00 1.00 1.00 1.00 1.00 1.00 1.00 Initial Bse: 0 265 0 0 295 0 0 0 0 0 0 0 Added Vol: 0 8 88 3 8 0 0 0 0 84 0 3 Initial Fut: 0 273 88 3 303 0 0 0 0 84 0 3 User Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Adj: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 PHF Volume: 0 273 88 3 303 0 0 0 0 84 0 3 Reduct Vol: 0 0 0 0 0 0 0 0 0 0 0 0 Final Vol.: 0 273 88 3 303 0 0 0 0 84 0 3 Adjusted Volume Module: Grade: 0! 01 Oi 01 3 Cycle /Cars: 0.00 0.92 0.00 0.92 xxxx xxxx xxxx xxxx t Truck /Comb: 0.06 0.02 0.06 0.02 xxxx xxxx xxxx xxxx PCE Adj: xxxx 1.00 1.00 xxxx 1.00 1.00 1.10 1.10 1.10 1.10 1.10 1.10 Cycl /Car PCE: 0.50 1.00 0.50 1.00 xxxx xxxx xxxx xxxx Trck /Cmb PCE: 1.50 2.00 1.50 2.00 xxxx xxxx xxxx xxxx Adj Vol.: 0 273 88 3 303 0 0 0 0 92 0 3 Critical Gap Module: » Population: 10000000 « » Run Speed(N /S): 30 MPH « RT Rad /Ang: 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg 20.0 ft /90.0 deg Critical Gp: 4.5 xxxx xxxxx 4.5 xxxx xxxxx 6.0 5.5 5.0 6.0 5.5 5.0 1 11 11 11 1 Capacity Module: Cnflict Vol: 303 xxxx xxxxx 361 xxxx xxxxx 670 667 303 623 623 317 Potent Cap.: 997 xxxx xxxxx 935 xxxx xxxxx 433 508 887 461 536 875 $ Used Cap.: 0.0 xxxx xxxxx 0.3 xxxx xxxxx 0.0 0.0 0.0 20.0 0.0 0.4 Impedance: 1.00 xxxx xxxxx I.00 xxxx xxxxx xxxx 1.00 1.00 xxxx 1.00 1.00 Actual Cap.: 997 xxxx xxxxx 935 xxxx xxxxx 433 508 887 461 536 875 ----- - - - - -1 11 11 11 1 Level Of Service Module: Unused Cap.: 997 xxxx xxxxx 932 xxxx xxxxx 433 508 887 369 536 871 LOS by Move: • • A • • • • Movement: LT - LTR - RT LT - LTR - RT LT - LTR - RT LT - LTR - RT Shared Cap.: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx 468 xxxxx Unused Cap.: xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx xxxx xxxxx xxxx 373 xxxxx Shared LOS: • • • • • • • • • • B • Traffix System Version 6.6 (c) 1992 DA Licensed to Kittelson & Assoc. Kittelson i Associates, Inc. Page 7 SUBSURFACE EXPLORATION AND GEOTECHNICAL ENGINEERING REPORT RIVERBANK SLOPE STABILITY INVESTIGATION PROPOSED COMMUNITY CENTER SITE • TUKWILA, WASHINGTON Submitted To: City of Tukwila 6300 Southcenter Blvd. Tukwila, Washington 98188 Submitted By: AGRA Earth & Environmental, Inc. 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034 -6918 December 1994 11-010006-00 gO'DEC191994 PUBLIC ORKS OAGRA Earth & Environmental. AG R A Earth & Environmental 7 December 1994 11- 010006 -00 City of Tukwila 6300 Southcenter Blvd. Tukwila, Washington 98188 Attention: Mr. Randy Berg, Project Manager AGRA Earth & Environmental, Inc. 11335 NE 122nd Way Suite 100 Kirkland, Washington U.S.A. 98034 -6918 Tel (206) 820 -4669 Fax (206) 821 -3914 Subject: Subsurface Exploration and Geotechnical Engineering Report Riverbank Slope Stability Investigation Proposed Community Center Site - Tukwila, Washington Purchase Order Number 38646 Dear Mr. Berg: Presented herein are the results of the subsurface exploration and geotechnical engineering study completed by AGRA Earth & Environmental, Inc. (AGRA) relative to the riverbank slope stability investigation for the proposed community center site in Tukwila, Washington. The report presents stability considerations for the existing riverbank conditions, as well as conditions proposed as part of the site development. Verbal authorization to proceed with this study was provided by Mr. Randy Berg on 30 November 1994. Our work has been completed in general accordance with our confirmation of scope of work and cost estimate letter dated 1 December 1994. We appreciate the opportunity to assist you on this project. If you should have any questions, please do not hesitate to contact us at your convenience. Respectfully submitted, AGRA Earth & Environmental, Inc. David C. Williams Associate Engineering & Environmental Services TABLE OF CONTENTS 11- 010006 -00 1.0 SUMMARY 1 2.0 PROJECT DESCRIPTION 1 3.0 SITE CONDITIONS 2 3.1 Surface Conditions 2 3.2 Subsurface Conditions 3 3.3 Groundwater 3 4.0 CONCLUSIONS AND RECOMMENDATIONS 4 4.1 Slope Stability Assessment 4 4.2 General Regrading Considerations - Maintenance Bench 5 4.3 Erosion Protection 6 5.0 CLOSURE 8 Figure 1 - Site and Exploration Plan Appendix A - Subsurface Exploration Procedures and Logs Appendix B - Laboratory Test Procedures and Results SUBSURFACE EXPLORATION AND GEOTECHNICAL ENGINEERING REPORT RIVERBANK SLOPE STABILITY INVESTIGATION PROPOSED COMMUNITY CENTER SITE TUKWILA, WASHINGTON 11- 010006 -00 1.0 SUMMARY Construction of the proposed project is feasible with respect to the subsurface conditions encountered at the subject site. A brief summary of our findings, conclusions, and recommendations is presented below. • Our reconnaissance of the riverbank adjacent to the community center site disclosed areas which are interpreted to be stable and functioning well under existing conditions. The reconnaissance also disclosed portions of the riverbank, in the eastern portion of the site, where the slopes are oversteepened and active erosion at the river's edge is promoting soil loss. • The slope stability analyses indicate that regrading will be necessary in the oversteepened, eroding portions of the riverbank in order to improve factors of safety regarding slope failure to acceptable levels. Erosion protection measures will need to accompany the regrading effort to prevent future erosion and slope degradation. • Rip rap erosion protection for the slopes in need of stabilization appears feasible above the vegetation line. Long term aesthetics, and wildlife habitat, of the areas to be mantled with rip rap can be enhanced by planting appropriate vegetation. This summary is presented for introductory purposes only and should be used in conjunction with the full text of this report. The project description, site conditions, and our detailed design recommendations are presented in the text of the report. The exploration procedures and Togs are presented in Appendix A. Laboratory testing procedures and results are presented in Appendix B. 2.0 PROJECT DESCRIPTION The project site is located within the Earlington Park property located south of South 124th Street and east of 42nd Avenue South in Tukwila, Washington. The Duwamish River forms the southern property boundary. Development plans for the property include construction of a community center building with exterior amenities such as vehicle parking and access areas, sport courts, walkways, and landscaping improvements. Development plans may also include the construction of a 15 -foot wide bench along the river bank at an elevation 2 feet above the ordinary high water mark. Construction of the bench will require excavating into the existing riverbank slope. Development plans also include improvements to those portions of the riverbank in need of stabilization. Erosion protection measures below the vegetation line are also intended to enhance fish habitat. City of Tukwila 7 December 1994 11-010006-00 Page 2 The purpose of our investigation was to assess the need for riverbank stabilization, to identify shallow subsurface soil and groundwater conditions, to determine factors of safety relative to stability under existing and proposed conditions, and to provide recommendations for erosion protection. Our scope of work included a reconnaissance of surface features, a subsurface exploration, laboratory testing, engineering analysis, and report preparation. In the event that any changes in the nature, design, or location of the site improvements described herein are planned, the conclusions and recommendations contained in this report should be reviewed and modified, if necessary, to reflect those changes. This report has been prepared for the exclusive use of the City of Tukwila, and its agents, for specific application to this project in accordance with generally accepted geotechnical engineering practices. 3.0 SITE CONDITIONS The site conditions were evaluated for this study in November 1994. The surface and subsurface conditions are described below, while the exploration procedures and interpretive logs of the explorations are presented in Appendix A. The proposed site development and approximate locations of the explorations are shown on the Site and Exploration Plan, Figure 2. 3.1 Surface Conditions The proposed community center site is located within the Duwamish Valley and consists of a relatively level piece of land. The overall ground surface elevation of the site is approximately 20 feet (mean sea level datum). The south side of the site borders the Duwamish River for a distance of approximately 900 feet. The conditions along the river bank area were observed during a reconnaissance of accessible portions of the slope, as well as by viewing conditions from the opposite bank to the south. Figure 2, the Site and Exploration Plan, presents mapping designations for the river bank area based upon estimated slope inclination, vegetative cover, and evidence of erosion or slope instability. Based upon our observations, we have divided the slope along the river bank into three categories: Type A: Shoreline with vertical or near - vertical slopes, with active slope failure and little or no vegetation. Type B: Shoreline with vertical or near - vertical slopes with moderate to heavy vegetation and little or no active erosion. Type C: Shoreline with 1.5 - 2H:1V slope inclinations and heavy vegetation. No active erosion noted. City of Tukwila 7 December 1994 11- 010006 -00 Page 3 We observed the western, downstream portion of the river bank to consist predominantly of Type C slopes. This area was generally well- vegetated, of moderate inclination, and did not present surficial evidence of deep- seated or significant shallow slope instability. Portions of the river bank in this area were also mantled by rip rap and sand and gravel fill material. All of these characteristics, combined with most of this river bank interval being located on an inside curve of the river, are interpreted to be contributing to the apparent stability of the slope. Approximately the eastern 375 feet of the river bank contained variable slope geometry and degree of ground cover. We have designated on Figure 2 all three of the slope types in this area. The presence of oversteepened slopes with little or no vegetation, and no surficial rip rap or granular soil armor, is of particular significance to the proposed community center development. Three distinct portions of the river bank were noted to be undergoing active erosion at the toe of slope by the river. This erosion, and active soil sloughing, have resulted in oversteepening of the slopes, followed by subsequent downslope soil displacement from the area above the toe. We observed these areas of active erosion to be fresh at the time of our site visits. The erosion will continue unless mitigated, in our opinion. 3.2 Subsurface Conditions Subsurface conditions were evaluated by 2 borings, B -1 and B -2, and 1 hand auger exploration, HA -1, advanced for this study, as well as by reviewing the GeoEngineers, Inc. report for the community center site (File No. 0259 - 021 -R01, November 1993). The site is underlain by loose to medium dense alluvial sand and silty sand. Some thin horizons of soft silt and sandy silt were interbedded with the sand. Subsurface soil conditions appear to be relatively uniform across the site. However, fill soils were encountered along the western portion of the site. A two foot thick layer of fill, which consisted of gravelly sand, was disclosed at the surface by boring B -2. Hand auger HA -1, advanced on the riverbank slope, disclosed a 1 foot layer of 4 to 6 inch quarry spalls at the surface. The quarry spalls mantled a 1 foot thick layer of the gravelly sand fill. Native alluvial sands were then found beneath the fill soils at a depth of 2 feet. Visual observation of soil exposures along the river bank disclosed soils consistent with those encountered in explorations located on the upland portion of the site. 3.3 Groundwater Groundwater, in the form of saturated soils observed while advancing borings B -1 and B -2, was encountered at depths of approximately 13 to 16 feet below existing grade. Groundwater levels for the site and vicinity, as described in the GeoEngineers report, were in the range of 10 to 12 feet below existing grade. Soil mottling suggests that periodic groundwater levels in the range of 7.5 to 10 feet in depth may occur. It should be noted that groundwater levels are likely to fluctuate due to variations in river level, precipitation, irrigation, site utilization, and other factors. City of Tukwila 7 December 1994 11-010006-00 Page 4 4.0 CONCLUSIONS AND RECOMMENDATIONS Proposed site improvements along the riverbank include stabilization of areas in need of improvement, the possible construction of a 15 -foot wide bench at an elevation 2 feet above the ordinary high water mark, and erosion protection. We understand that the exact location of the bench area along the riverbank has yet to be determined, and that it may not extend along the entire riverbank, but rather, be located in those areas where the need for potential future maintenance is considered necessary. We understand that the maintenance bench will be utilized on a periodic basis (perhaps once every two years) to allow equipment access for riverbank maintenance. The bench area is to be planted with vegetation which could be mowed or cut as needed to provide temporary equipment access, but still provide erosion protection. Development plans also include erosion protection improvements below the vegetation line, as necessary. These erosion protection measures are to include large woody debris intended to improve fish habitat. Our field reconnaissance identified portions of the riverbank which have been interpreted to be stable under current conditions in their present configuration. However, portions of the riverbank were observed to be undergoing severe erosion. Our analyses indicate that adequate factors of safety against slope failure can be achieved through regrading the distressed areas along the river. This regrading could include construction of the maintenance bench, if necessary. The incorporation of appropriate erosion protection features, based upon proven design and experience, is anticipated to yield satisfactory results. Given the nature of the overall site development, the cost of the project, and the cost of potential future remedial repairs, we recommend that the City evaluate all options when selecting erosion protection and fish /wildlife habitat enhancement improvements. Presented below are our conclusions and recommendations regarding the need for bank stabilization, excavation and grading, and erosion protection. 4.1 Slope Stability Assessment Section 3.1 describes conditions observed along the riverbank area during our field reconnaissance in November 1994. The reconnaissance disclosed that most of the riverbank area appears to be stable, this due to the relatively shallow slope inclinations, some protective granular fill material and rip rap surfacing, and well - established vegetative cover. Some areas along the eastern portion of the riverbank are interpreted to be in need of stabilization efforts due to their oversteepened condition, sparse vegetation, lack of protective rip rap, and ongoing erosion. We analyzed slope stability through two cross sections along the riverbank. Section A -A' was located in the eastern portion of the riverbank area and is representative of an oversteepened area currently being eroded by the river. Section B -B', located farther to the west, is City of Tukwila 7 December 1994 11- 010006 -00 Page 5 representative of an area which features a moderate slope, partial armor cover, and well established vegetation. The cross section locations are shown on the Site and Exploration, Figure 2. Stability at these two locations were analyzed by Bishop's method, utilizing the PC -SLOPE computer program. The stability under existing slope configurations was analyzed, as well as a proposed configuration incorporating a regraded slope in order to establish a stable configuration at Section A -A'. Groundwater conditions were assumed to be at a maximum elevation of 8 feet, with rapid drawdown effects taken into consideration. A summary of the factors of safety for the sections analyzed is presented below. SUMMARY OF PRELIMINARY SLOPE STABILITY ANALYSIS SECTION CONDITION FACTOR OF SAFETY A -A' A -A' B -B' Existing Proposed Existing 0.8 1.3 1.1 to 1.3 Note: The calculated factor of safety is influenced by the groundwater levels, as well as buttressing effects of rip rap. As the summary above indicates, section A -A' along the eastern riverbank area is currently in what should be considered an unstable condition, and further slope degradation should be anticipated. The factor of safety against slope failure could be improved by regrading the slope to a shallower inclination. Fortunately, the possible riverbank regrading for the maintenance bench provides an opportunity to flatten the oversteepened slopes, provide erosion protection, and improve slope stability. The analyses indicate that Section B -B', which may be considered representative of the existing slope areas which are not oversteepened, possesses an adequate factor of safety under current conditions. Potential regrading in currently stable areas could be done in such a fashion as to produce acceptable factors of safety, also. 4.2 General Regrading Considerations - Maintenance Bench Plans to regrade all, or portions, of the riverbank area to create a 15 -foot wide bench at 2 feet above the ordinary high water mark will require excavating into the existing bank area. We would anticipate that very little fill placement, if any, will accompany the construction. The borings advanced for this study, and explorations by others, disclosed loose silty sand and soft sandy silt to underlie the site. We expect that the excavation could be completed with conventional earth moving equipment. City of Tukwila 7 December 1994 11-010006-00 Page 6 We recommend that the slope extending upward from the bench area be excavated at an inclination no steeper than 2H:1V (Horizontal:Vertical). The base of the slope should be compacted by track walking with a bulldozer operating up and down along the fall line of the slope. This will help reduce soil erosion on the slope until such time as vegetation is established and until slope protection measures are implemented. It should be noted that the riverbank soils will be highly susceptible to disturbance by flowing water. Consequently, we recommend that grading be accomplished during the summer and early fall months when the weather is typically better. Also, a protective berm should be established along the top of the slope such that surface water on the upper, flat portion of the community center site is not directed down over the face of the riverbank. We understand that the maintenance bench will be periodically used for equipment access along the river. At the time this report was written, it was not clear whether only tracked equipment only, or also wheeled vehicles, would be expected to utilize the bench. We recommend, as a minimum, that the maintenance bench subgrada be compacted to at least 90 percent of the modified Proctor maximum dry density (ASTM:D -1557) to a depth of 12 inches below the bench surface. 4.3 Erosion Protection It is our understanding that nominal flow velocities in the river adjacent to the community center site average approximately 5 feet per second (fps). However, short term velocities associated with high river levels are reportedly anticipated to be in the range of 12 fps. Due to tidal influence, frequently the river level is quite low, and upstream flow actually occurs, also. Even though the flow velocities may be considered relatively low over much of any given time span, it is our opinion that the erosion protection measures selected for the riverbank area should be based upon the maximum anticipated flow velocities. The incorporation of the erosion protection measures which are adequate to protect the riverbank during nominal flow could provide short term protection under increased flows. However, some erosion and damage to the shoreline should be expected. In the event that the type of erosion protection typically required to accommodate flows in the 12 fps range is considered undesirable, then the City should clearly identify the potential risk to community center facilities which could be impacted by severe bank erosion attendant with higher river levels and high velocities. A well established vegetative cover may be successful in preventing erosion with river velocities up to approximately 5 fps. 8 fps is considered the upper velocity limit for "bioengineered" vegetation /soil systems which incorporate appropriate plantings and specifically constructed slopes designed and constructed with specific erosion mitigation goals. Flow velocities in excess of 8 fps generally require, as per standard practice, the application of rock rip rap, or other "hard" surface treatments, such as interlocking pre -cast concrete blocks, or rockfill mattresses. Rip rap is one of the most effective and common City of Tukwila 7 December 1994 11- 010006 -00 Page 7 methods of bank protection, and it is applicable under most conditions where bank erosion occurs. Rip rap possesses the virtues of being able to settle and conform to a slope surface, and vegetation can become established through the rock above the waterline. It is our recommendation that slope protection be considered for areas identified on the Site and Exploration Plan, Figure 2, as "Type A" and "Type B ". These portions of the riverbank were observed to have oversteepened slopes, little or no vegetative cover, and minor to severe erosion. In addition, any areas which are regraded in order to construct the 15 -foot wide maintenance should also be protected by new erosion mitigating improvements. It is our recommendation that rock rip rap meeting the quality criteria presented in section 9- 13.1 of the Standard Specifications for Road, Bridge, and Municipal Construction (Washington State Department of Transportation - WSDOT) be utilized. We recommend that the rip rap section be 2 feet in thickness, and extend to 2 feet above the design high water surface. The maximum individual stone size should be 24 inches, with a medium stone size of 16 inches, and a minimum stone size of 4 inches. The surficial rip rap blanket should be underlain by a 6 inch thick graded filter. It may be feasible to alternatively install a geotextile fabric beneath the rip rap instead of a graded filter. However, placement of the geotextile may hinder subsequent vegetation growth through the rip rap. The rip rap section described above is anticipated to provide adequate erosion protection given the anticipated 12 fps maximum river velocity. It may be possible to reduce the rip rap size and section thickness provided that appropriate vegetative planting is initiated to complement the rip rap placement. From our observations of other portions of the riverbank adjacent to the community center site, as well as along other portions of the Duwamish River, it is apparent that the combination of rip rap and vegetation effectively reduces the erosion potential. However, the establishment of a detailed combination of rip rap and planting was beyond the scope of this study. We recommend that a specialist familiar with soil bioengineering be consulted in order to develop a plan for combining rip rap and reinforcing vegetation ground cover installation. We understand that fish habitat enhancement is desired for the area below the surface vegetation line. This fish habitat enhancement is anticipated to include the emplacement of large woody debris in order to provide shade and resting spots for fish. It would be feasible to install root wads with attached trunk sections below the vegetation line by anchoring them in place with rip rap and boulders, in our opinion. Regular monitoring of the shoreline is recommended subsequent to placement of the woody debris in order to determine whether its placement alters shoreline flow patterns sufficiently to initiate toe erosion. River flow redirection due to the presence of large woody debris can be a major factor in redirecting the potentially erosive flows, possibly causing lateral migration of the shoreline and degradation of the slopes above. City of Tukwila 7 December 1994 11- 010006 -00 Page 8 Areas described on Figure 2 as "Type A" and "Type B" are recommended for regrading and stabilization as part of site development. The successful utilization of the regraded and vegetated or rip rapped slopes in these areas will depend on adequate protection of the toe of the slope against erosion. Consequently, it will be necessary to protect the toe of the slopes with the rip rap section described above. The installation of root wads and trunks with the rip rap installation could be accommodated in these areas. As described previously, it will be necessary to anchor the trunk portion of the large woody debris, within the rip rap, and also use large boulders to assist in providing an anchorage function. These areas should be considered especially susceptible to erosion due to the non - uniformity of the riverbank. We observed backflow and eddies below the most severely eroded slopes. Consequently, erosion protection below the vegetation line will need to complement the erosion protection efforts implemented on the slope above the vegetation line. 5.0 CLOSURE The field investigation and engineering analyses identified riverbank areas which have been interpreted to be stable under existing conditions, as well as areas which are currently unstable and in need of improvement. Regrading the distressed areas appears to be feasible, from the geotechnical perspective, in order to stabilize these areas. The regrading effort will need to be accompanied by the placement of appropriate surfacing to minimize future erosion. Additional slope stability analyses may prove beneficial as the City and its designers work out the improvement alternatives for the riverbank area. It is our opinion that the City would benefit from efforts intended to clearly determine the range of flow velocities in the river, and the frequency of flow variations, as part of the decision making process regarding the type and extent of erosion protection measures to be implemented. This process may include discussions with the Corps of Engineers and a review of their records. A river is a dynamic environment which has the potential to exhibit erratic behavior in terms of flow variation, shifts in flow direction within the channel, and presents the opportunity to migrate laterally. These river characteristics hold true even for those which have some degree of flow control afforded by an upstream dam. The process of planning and implementing the potential improvements along the riverbank would also benefit, in our opinion, from a review of historical aerial photographs which cover the Duwamish River system. It may be possible to establish an order of magnitude regarding past channel migration. We feel that this information would help the City assess the level of risk associated with construction close to the river. Subsequent design decisions could reflect the level of risk considered acceptable by the City. {e %,611 .9 6'16 a:,`s l EXPIRES 1 / 24 /q-1 rI& 1- 5 RUGGLES ST 5 GOR < 5100 vs! 5 HAZEL' S ItMI1 M r. 1111. .111 S 112TH 'ST 112TH S sz 5 119TH JUNIPERTST s1L9THST S SITE s127TH pe s �! _131ST • M7SP Y 142ND HA1f1MIT PARR LIB FS 5 I515T S 149TH ST 5 149111 ST 150TH ST 22 HQR\ DYK S 14E11 uvl 152ND ST 231 -1 0 AG RA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington, U.S.A. 98034 -6918 W.O. 1110008 DESIGN DCW DRAWN DMW DATE _DEC 191:14 SCALE N.T S TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON LOCATION MAP FIGURE 1 A 20 -- 10- - 10 20 ? - - -9 ?- - -�- ?= f -- SOFT SILT WITH SOME SAND 8 -1 — 4 — 8 —6 —8 LOOSE, MOIST, SILTY, FINE SAND —6 — — ?— —? .8-- - ? - - -? —10 GROUND SURFACE LOOSE TO MEDIUM DENSE, SATURATED, FINE TO MEDIUM SAND WITH SOME SILT 1 B 8- 2 1 1 10 - 10 a — 4 — 7 —5 —6 LOOSE, SATURATED, SAND WITH TRACE TO SOME SILT LOOSE, MOIST, BROWN, SAND WITH SOME SILT \ N 4 " -6" RIP RAP (FILL) HA -1 SOFT, TAN SILT WITH SOME SAND N. MEDIUM DENSE, MOIST GRAVELLY SAND (FILL) NOTES: THE STRATA ARE BASED UPON INTERPOLATION BETWEEN EXPLORATIONS AND MAY NOT REPRESENT ACTUAL SUBSURFACE CONDITIONS. SIMPLIFIED NAMES ARE SHOWN FOR SOIL DEPOSITS, BASED ON GENERALIZATIONS OF SOIL DESCRIPTION. SEE EXPLORATION LOGS AND REPORT TEXT FOR SOIL DESCRIPTIONS. SOURCE: TOPOGRAPHY BASED ON PLAN BY IRWIN ENGINEERING, INC., DATED 17 OCTOBER 1994. •AGRA Earth & Envlronmental 11335 N.E. 122nd Way, Suite 100 Kirkland, WA, U.S.A. 98034 -6918 GROUND SURFACE LOOSE, MOIST, SILTY, FINE SAND I - -9 - -? — ? — — —? TO MEDIUM DENSE, TED, FINE TO MEDIUM . WITH SOME SILT A' /— 4 " -6" RIP RAP (FILL) HA -1 N N MEDIUM DENSE, MOIST GRAVELLY SAND (FILL) ( B' RATIONS AND MAY NOT ES ARE SHOWN FOR SOIL SEE EXPLORATION LOGS 17 OCTOBER 1994. LEGEND B- 2 — 37 STANDARD PENETRATION TEST BLOWS PER FOOT --= WATER LEVEL AT TIME OF DRILLING 0 10 20 APPROXIMATE SCALE IN FEET (HORIZONTAL AND VERTICAL) •AORA Earth & Environmental 11335 N.E. 122nd Way, Suite 100 Kirkland, WA, U.S.A. 98034 -6918 W.O. DESIGN DRAWN DATE SCALE 11 -10006 WJL MJF DEC 1994 1 " =10' • ' TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON GENERALIZED SUBSURFACE SLOPE . PROFILE FIGURE 3 A A EARTH & ENVI- RONYENTAL, INC. DRAMANG NO. ..t11\10006 \X- S -A.DW . O rJ', /CMe VM No1 r.wr.d 1 M 1 r I t l , f— , . .. ' 14.83 � I I No '' i I 11 y ! 1 1 i " � dncdt 1 it II.. , r • (, A. A a! f t � r 510., • 5.012 • E. 1..1•• • Wee.. ,'ouil /.w.•t r .• • • Ilrl � .r �• ��. _ CI Oa. rd.\ :S0.7f1 \ Cc Cilcn • I Pen Y 1 Ic •\\ I 4 ft N 119;‘7.\:4- 0 $0000 \ 1 i \ 3 ti q ll. ter} V..« \ a.,, A00.01 •: row* „•rr .•r F..: H. OF •�L_ °♦♦ 411 �•r •v• N. • y1 • '1• „rr / ♦nr yy 14. y6 rC ,r rr• • ♦ / 51 ro,1e,•_. Cast .,.. 1,.,......./1 rro L ••/ C.c clad,^ G•cn - rmgdlr.. __— —i.," I:A 600..012•1 I.^, *0I l0•'. W.<t vel It P6 !CO K..t Cou •I7. 04 • „r. rr +f y t / ♦+' .0 -.110 X ,X • • nn l. ■ ••r t,♦ •.•r 1\ ' • • }.71 . •.7 tuny.E.tmo't e•w,d ax �� 1317 •00" \ davda,. 5.. tiol• `M 5•.e•r,` 1 td ^ ti,E tr ♦, •+ •e•n• WIAL _0 DRAWING BASED ON PLAN BY IRWIN ENGINEERING. INC, DATED 10/ 17/94. 5 ■ • • A' •AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington, U.S.A. 98034 -6918 — — - - - - ■••.--a Cr.he W.1" :5000 :V., CO fence ertne • I I e_ _ — - • - —"" I ... • 1 . • ;1--- - ;.;‘• ••• 5 47■1 ir:•• • 25 j251 1 1. W ;PA 9, I • 124th Street r 20---Lx. •• ■•• " _ €125th Street SI _ - - - - 7 .5. W rem . • •••• \ Cool Lo•I r•ccie4.1 O.Ch freq.:hen 411 " / 04 • 'ep . 7:0 / .,, / ..*- I ‘ / ' •••• el." i .." . ---- • ..- • • - .. ..- •. N . . • . • ..• ,•,•• / • • • • ';' B-1 sP•••••••,;,', • • Ikkoleos) LAt eqz.•••• Pt VOI 12. A0 100 Keg Corry. . 11 19 2 .3 9:octe :3 A. .ntoon ---------- • ...•"''' ,.., ...IC; s. raw, N. ••••- pm •,,..;,,.../..*•.. 12.0 ff.f.SI • J 1,.... 7.0......4.----- •?....:::-.. • •' . 7°. 'ft l',....••••• • wm, 1./ • lt Is v, o 4 p. • •1 A ••••• „•• 0 80 160 SCALE IN FEET LEGEND B-2 s BORING NUMBER AND APPROXIMATE LOCATION ' B-7 TEST PIT NUMBER APPROXIMATE LOCATION -- . • 31 (GEOENGINEERS. NOV. 1994) HA-1 . . A HAND AUGER NUMBER AND APPROXIMATE•LOCATION• • B ; B' DESIGNATION AND SLOPE LOCATION OF TYPE A SHORELINE WITH VERTICAL OR NEAR VERTICAL SLOPES. WITH ACTIVE SLOPE FAILURE AND LITTLE OR NO VEGETATION TYPE B SHORELINE WITH VERTICAL OR NEAR VERTICAL SLOPES WITH HEAVY VEGETATION AND LITTLE OR NO ACTIVE EROSION TYPE C SHORELINE WITH 1-1/2-2H:1V SLOPE INCLINATIONS AND HEAVY VEGETATION. NO ACTIVE EROSION NOTED OAGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington, U.S.A. 98034-6918 WO. 1110008 DESIGN DCW DRAWN MAW • DATE Jarelikiii____ SCALE NOTED • TUKWILA COMMUNITY CENTER TUKWILA, WASHINGTON SITE & EXPLORATION PLAN FIGURE 2 APPENDIX A SUBSURFACE EXPLORATION PROCEDURES AND LOGS APPENDIX A FIELD EXPLORATION The field exploration program conducted for this study consisted of advancing a number of test borings, advancing a hand boring, and performing a visual reconnaissance of the riverbank areas. The approximate exploration locations are illustrated on the Site and Exploration Plan, Figure 2. The exploration locations were obtained in the field by hand -held compass and taping from fixed site features shown on a plan dated 17 October 1994 and prepared by Irwin Engineering, Inc., provided by KPFF Consulting Engineers. Elevations of the explorations were obtained by interpolation between contours indicated on the above mentioned site plan with respect to their locations. The locations of the explorations should be considered as accurate as the degree implied by the method used. Hollow Stem Auger Borings 2 borings were drilled on 5 December 1994 by a local exploration drilling company under subcontract to our firm. The borings were drilled by advancing a 2.5 -inch inside diameter hollow -stem auger with a portable drill rig. During the drilling process, samples were generally obtained at 2-1/2 foot depth intervals. The borings were continuously observed and logged by an engineering geologist from our firm. Disturbed samples were obtained by using the Standard Penetration Test procedure as described in ASTM:D 1586. This test and sampling method consists of driving a standard 2 -inch outside diameter, split barrel sampler a distance of 18- inches into the soil with a 140 pound hammer free falling a distance of 30 inches. The number of blows for each 6 -inch interval is recorded. The number of blows required to drive the sampler the final 12 inches is considered the Standard Penetration Resistance ( "N ") or blow count. The blow count is presented graphically on the boring Togs in this appendix. If a total of 50 blows is recorded within one 6 -inch interval, the blow count is recorded as 50 blows for the number of inches of penetration. The resistance, or "N" value, provides a measure of the relative density of granular soils or the relative consistency of cohesive soils. A single hand auger exploration was advanced at the approximate location shown on Figure 2. The exploration consisted of advancing a 3 -inch diameter hand auger, and observing bulk soil cuttings retrieved as the boring was advanced. The boring logs presented in this appendix are based on the drilling action, inspection of the samples secured, laboratory results and field logs. The various types of soils are indicated as well as the depths where the soils or characteristics of the soils changed. It should be noted that these changes may have been gradual, and if the changes occurred between sample intervals, they were interpreted. Tukwila Community PROJECT: Center W.O. 11- 10006 -00 BORING NO. g_ 1 SOIL DESCRIPTION A •• Approximate ground surface elevation: 20 feet 0 - 5 - 10 " - 15 2 STANDARDPENETRATION RESISTANCE j Page 1 . Blows per foot oft v 3 0 10 20 30 40 oTESTING Loose, moist, dark brown, silty, fine SAND Rust mofiting noted Soft, saturated, rust mottled gray, SILT with some fine sand Loose to medium dense, saturated, gray to black, fine to medium SAND with some silt S -1 S -2 S -3 • S -4 S -5 ATD S -6 S -7 a - 20 - - 25 - Boring terminated at approximately 19 feet - 30 - LEGEND I2 -inch OD split -spoon sample Tis V Groundwater level AID at time of drilling a4 Grain size analysis e200 wash (percent fuses shown) •••• 'SEMI : I t. »........._._._.a __. «..._. I i __._.1 1 i` ._.. {....._......_._._. {SEES »SEES. _._._._............_._.« _...«..__«_...L... «._.. 1 i i }I 1 1 1 J I ? t ! ._.rt......_... -'t _._•_•_T.._........_._._._.. ..._._._._.I.. «SEES.. I i i 1 i I i I ! ' j 20 30 40 g0 MOISTURE CONTENT • 1 Natural liquid limit b t0 1 Plastic limit •AG RA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034 -6918 Drilling started: 05 December 1994 Drilling completed: 05 December 1994 Logged by: WJL • Tukwila Community PROJECT: Center W.O. 11-10006-00 BORING NO. B-2 SOIL DESCRIPTION „§ Approximate ground surface elevation: 20 feet - 0 9 15 2 IN I STANDARDPENETRATION RESISTANCE Page 1 8 A Blows per foot of I < o 10 20 30 40 °TESTING - 10 -I - 15 Soft brown, SILT with some sand Medium dense, moist, gravelly, fine to medium SAND (RID Loose, moist, brown, fine to medium SAND with . some silt Increasing slit content Rust mottling observed Decreasing silt content Soft, wet to saturated, tan with rust mottling. SILT with some fine sand "---r Loose, scrturated, black, fine to medium SAND with trace to some silt S-1 S-2 S-3 S-4 S-5 S-6 S-7 ATD .1 .4. - 20 - - 25 - - 30 Boring terminated at approximately 19 feet LEGEND I2-inch OD split-spoon sample Groundwater level AID at time of drilling 10 20 30 40 I I Plastic limit Natural Liquid limit • i MOISTURE CONTENT • AG R A Earth & Environmental 11335 NE 122nd Way, Suite 100 Klddand, Washington 98034-6918 Drilling started: 05 December 1994 Drilling completed: 05 December 1994 Logged by: wji. Depth (feet) 0.0 - 1.0 1.0 - 2.0 2.0 - 3.0 APPENDIX B LABORATORY TEST PROCEDURES AND RESULTS APPENDIX B LABORATORY TESTING PROCEDURES A series of laboratory tests were performed during the course of this study to evaluate the index and geotechnical engineering properties of the subsurface soils. Descriptions of the types of tests performed are given below. Visual Classification Samples recovered from the exploration locations were visually classified in the field during the exploration program. Representative portions of the samples were carefully packaged in watertight containers and transported to our laboratory where the field classifications were verified or modified as required. Visual classification was generally done in accordance with the Unified Soil Classification system. Visual soil classification includes evaluation of color, relative moisture content, soil type based on grain size, and accessory soil types included in the sample. Soil classifications are presented on the exploration logs in Appendix A. Moisture Content Determinations Moisture content determinations were performed on representative samples obtained from the explorations in order to aid in identification and correlation of soil types. The determinations were made in general accordance with the test procedures described in ASTM:D -2216. The results of the tests are shown on the exploration Togs in Appendix A. Grain Size Analysis A grain size analysis indicates the range in diameter of soil particles included in a particular sample. Grain size analyses were performed on representative samples in general accordance with ASTM:D -422. The results of the grain size determinations for the samples were used in classification of the soils, and are presented in this appendix. 100 so 8o 70 60 re W 50 40 re W30 20 10 0 GRAIN SIZE DISTRIBUTION SIZE OF OPENING IN INCHES 36" 12" 6' 3" 1 1/2" 3/4" 3/8" U.S. STANDARD SIEVE SIZE 4 10 20 40 80 100 200 1 11 1 HYDROMETER 1000 00 100.00 1000 1.00 0.10 GRAIN SIZE IN MILLIMETERS 0.01 0.00 BOULDERS COBBLES Coarse 1 Fine Coarse Medium 1 Fine Silt I Clay GRAVEL SAND FINE GRAINED Exploration B -1 - --1lt -alt Sample Depth Moisture Fines Soil Description S-4 10' 10% 20% Silty SAND Project Tukwila Community Center Work Order: 11- 10006 -00 Date: 12 -6-94 OAGRA Earth & Environmental 11335 NE 122nd Way Suite 100 !addend, Washington 98034 -6918 A. RECEIVED FER 1 0 1995 C:UMMUNI rY DEVELOPMENT BACKGROUND Control No. Epic File No. [ 6 Fee $225.00 Receipt No. ENVIRONMENTAL CHECKLIST 1. Name of proposed project, if applicable: Tukwila Community Center 2. Name of applicant: City of Tukwila 3. Address and phone number of applicant and contact person: 6300 Southcenter Blvd., Suite 100, Tukwila, WA 98188; 433 -0179; Randy Berg (1644) 4. Date checklist prepared: 11/28/94 „(g/406;) 5. Agency requesting checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): Phase I- Building construction, . ?arking improvements, stabilzation and limited landscaping are planned to 1995 and be completed by Spring of 1996. Phase II- The remaining park improvements are 'p1 construction in 1997. Duwamish River bank begin in Spring of anned to be under 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal ?' If yes, explain. No 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A shoreline stabilization study has been completed to determine the best way to treat the Duwamish River shoreline. A Traffic Impact Analysis has been completed to determine appropriate traffic impact mitigations and offsite improvements. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. Yes, City of Tukwila, :. Condition; Use.; Permit, and Board of Architectural... Review Approval -2- 10. List any government approvals or permits that will be needed for your proposal. U.S. Army Corps of Engineers permit for work on the shoreline and storm water discharge; Hydraulic Project Approval from Washington State Dept. of Fisheries; Shoreline Substantial Development Permit; Conditional Use Permit; Architectural Review; Building, Mechanical, and Electrical Construction permits. Flood Control. Zone. Permit 11. Give brief, complete: description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. Section E requires a complete description of the objectives and alternates of your proposal and should not be summarized here. The Tukwila Community Center project is planned as a 48,000 sq. ft. multi- purpose recreation facility with a gymnasium, fitness, racquet ball, dance, and multipurpose meeting spaces. The completed project will include recreation staff offices, and a senior adult activity center. Exterior improvements will include parking for •327 cars, athletic fields and picnic and other passive recreation improvements. Included in the site improvements will be the required stabilization of the Duwamish River Bank fronting on the subject site. 12. Location of the proposal. Give, sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The Subject Site is a 12.8 acres located on the bank of the Duwamish River. The Site is bounded by 42nd Avenue South, and South 124th Street, located within the South East corner of Section 10 -23 -4. 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? Yes- The Duwamish River shoreline is designated as a sensitive area. B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other The Site is essentially flat, except for the steep banks of the river. b. What is the steepest slope on the site (approximate percent slope)? 40% to 70% at the river. -3- c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. Soils on the site come from a variety of river sediments, and include sands, silts and gravels, and are classified as Puyallup Series. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. Yes, there is some evidence of recent erosion and sloughing at the river bank. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. The proposed river bank stabilization work will require removal of approximately ,9,000.- cubic. yards of material from the bank, which will be reused on the site. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. g- Yes- Construction Activities will result in removal of vegetation on the site, making it vulnerable to surface erosion. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? Approximately 30% of the project site will be covered with impervious surfaces. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Specifications and drawings for construction of all project elements will reflect the provisions of the Land - Altering Ordinance and the King County Surface Water Design Manual for erosion control measures during construction as well as the permanent erosion control measures included in the river bank stabilization plan. 2. Air a. What types of emissions to the air would result from the proposal (i.e., dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction exhausts and dusts till be generated during the construction of the project. -4 -' b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. No c. Proposed measures to reduce or control emissions or other impacts to air, if any: The construction site will be watered as required during dry weather to minimize the generation of dust. 3. Grater a. Surface: 1) Is there any surface water body on or in the immediate vicinity of the site (including year -round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. The Site is bounded to the'South by the Duwamish River. 2) Will the project require any work over, in, on, or adjacent to (within 200 feet) of the described waters? If yes, please describe and attach available plans. Yes, the 48,000 .sq. ft. Community Center and various park improvements are planned within 200 feet of the river. Some recontouring and stabilization of the river bank is also planned. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Some material will be removed from the river bank to provide more stable contours and to provide maintenance access to the river bank. The total amount of material removed will be approximately 9,000 cubic yards. 4) Will the proposal requixel surface water withdrawals or diversions. Give general description, purpose, and approximate quantities, if known. No -5- 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. Yes, a portion of the river bank including. trail and river bank improvements is within the 100 year floodplain, however no buildings or permanent improvements are planned in this area. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities, if known. No 2) Describe waste materials that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.) Describe the general size of the system, the number of such systems, the numkLer of horses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Storm water runoff from improved impervious surfaces will be collected, treated with a wet vault, coalescing plate oil -water separator and bio- filtration swale and discharged to the Duwamish River. 2) Could waste materials enter ground or surface waters? If so, generally describe. Yes. Any major construction project presents some risk of this type of impact. However, construction timing and strict controls during construction are observed to prevent such occurrences. -6- d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: Storm water will be treated as described in answer 4 -c -1, above. Erosion control methods will be employed during construction to minimze risks of runoff and erosion impacts during construction. 4. Plants a. Check or circle site: x d iduous tre evergreen tree: x / BhrubB� x x types of vegetation found on e_ ,alder, maple, aspen, other fir,' cedar, pine, other the crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eel grass, millfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? c. Nearly all of the existing on site vegetation will be removed and the site will be totally relandscaped. River bank vegetation will be left undisturbed except where the river bank is recontoured or armored against erosion. List threatened or endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The Subject Site will be entirely relandscaped with irrigated lawns and planting beds and will include perimeter trees and screening trees at the parking areas. The river bank will be relandscaped using native riparian species. -7- 5. Animals a. Circle any birds of animals which have been observed on or near the site or are known to be on or near the site: x birds: haw eron Qnybirdp,) other : x mammals; beavers, raccoons, squirrels, small r�oodnt s x itsh. rout coha . salmon, and perhaps some freshwater mussels-in- atercourses b. List any threatened or endangered species known to be on or near the site. None known. c. Is the site part of a migration route? If so, explain. Yes, the annual salmon migration up the Duwamish River will pass the Subject Site. d. Proposed measures to preserve or enhance wildlife, if any: Proposed development of the Subject Site as a park will preserve open space for habitat. Treatment of the River bank will be aimed at enhancing the aquatic and riparian habitats. 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Completed recreation facilities and buildings will utilize electricity for heating, cooling and lighting. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Buildings design will incorporate energy conservation alternatives. Where possible, recycled materials will be utilized for construction cf improvements. Energy efficient heating, cooling and lighting will be utilized. 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. No 1) Describe special emergency services that might be required. Only routine fire. police, and first - aid /ambulance capacities. 2) Proposed measures to reduce or control environmental health hazards, if any: Limited work hours will be observed (daytime) to mitigate noise disturbance to local residences. WISHA and OSHA standards will be observed to . protect workers during construction. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Truck and other traffic noise exist at the site. Air traffic to and from Boeing field can be heard at the Site. 2) What types and levels of noise would be created by or associated with the project on a short-term or long -term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. 3 ) Construction noise will occur on a short - term basis (restricted to daytime hours). In addition some noise can be expected from spectators and participants at the proposed recreation facilities. Proposed measures to reduce or control noise impacts, if any: Construction will be restricted to daytime hours. Outdoor recreation facilities will include buffer areas to screen excessive noise, and will be scheduled for use during daylight and early evening hours. -8- 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The majority of the Subject Site is currently vacant, with a portion of the site used as a community garden with parking and a small restroom structure. Adjacent properties are residential (east) and commercial (south). b. Has the site been used for agriculture? If so, describe. Yes the site has traditionally been used as pasture land but has not been so used for many years. A portion of the site has more recently been used as a community garden (pea - patch). c. Describe any structures on the site. A 150 sq. ft. restroom building is currently, on the site. d. Will any structures be demolished? If so, what? Yes, the existing restroom building will be demolished as part of this project. e. What is the current zoning classification of the site? R -1, 7200 f. What is the current comprehensive plan designation of the site? g- Parks and Open Space. If applicable, what is the current shoreline master program designation of the site? Urban h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. Yes, the shoreline of the Duwamish River is currently designated as environmentally sensitive. i. Approximately how many people would reside or work in the completed project? About 15 people will work at the new facility. j Approximately how many people would the completed project displace? None -9- k. Proposed measures to avoid or reduce displacement impacts, if any: Not applicable 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: None. 9. Houuing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low - income housing? None b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low- income housing. c. None Proposed measures to reduce or control housing Impacts, if any: None 10. Aesthetics a. What is the tallest height tf any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The proposed height of the gymnasium and building entrance are now 42 feet. This requires a Variance (approved). Exterior building materials include wood, brick and metal roofing. b. What views in the immediate vicinity would be altered or obstructed? None c. Proposed measures to reduce or control aesthetic impacts, if any: Specific design goals include creating a facility and park which will serve as a sense of pride to the community. The Project will be subject to the requirements of Architectural Review. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? Some off -site spread of light from parking area lights and future athletic field lighting is possible during evening hours. -10- b. Could light or glare from the finished project be a safety hazard or interfere with views? No c. What existing off -site sources of light or glare may affect your proposal? None d. Proposed measures to reduce or control light and glare impacts, if any: Parking lot lighting and athletic field lighting will be placed and shielded to minimize light spread. Athletic events will be scheduled to avoid late night uses. Parking lot lights will be put on a timer to avoid late night glare when the facility is closed. 12. Recreation a. What designed and informal recreational opportunities are in the immediate vicinity? The Allentown Park about 1/2 mile to the north offers a multi -use athletic field and picnicking. The Duwamish River offers boating, fishing and jogging. opportunities. b. Would the proposed project displace any existing recreational uses? If so, describe. Yes, the existing Allentown pea-patch will be relocated to the Codiga Farm about 1 mile to the east of the subject site. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: The project will include baseball and soccer fields, basketball and tennis facilities, children's play equipment, picnicking, trails and other outdoor recreation facilities. The building will include a gymnasium, racquetball, game room, dance and fitness space, as well as meeting and an adult senior activity center. 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. The Subject Site qualifies to be listed as an archaeologically significant site because of the presence of Indian camp remains. -12- b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. No surface landmarks indicate archaeologic importance, but a subsurface survey of the site has resulted in a dilineated area of the site determined to be of archaeological significance. Lithic tools, fire modified rocks and evidence of food processing on the site date back nearly 2 centuries. c. Proposed measures to reduce or control impacts, if any: An Archaeologist has been included in the project team. The design has deliberately avoided disturbance of the area declared significant. Soils in this area will not be disturbed below the plow zone (about 12 inches). This avoidance will preserve the subsurface archaeology for future investigation. 14. Transportation Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The Subject Site is currently served off South 124th Street, and 42nd Avenue South. Future Site access is planned from both of these streets. Trees at the driveways are not to obstruct sight driver distances. The Tucwila Community Center- project will pay proportionate slate of 42nd Ave. S. and S.124th St. intersection ': mprovements and lighting to provide safety and capaity for the new vehicle and pedestrian traffic. The 42nd Ave. S. /S. 124th St. design report will determine specific improvement. details including TCC tranportation impact, ...analysis recommended.. mitigations including- signalization and sdwalks. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? c. Yes, A Metro route passes the site on 42nd. How many parking spaces would the completed project have? How many would the project eliminate? The site improvements will include,, 327 .. parking stalls. Currently the Site has 15 stalls which will be removed. -13- d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). The proposed improvements will include frontage improvements to 42nd Avenue South, and to South 124th Street. These improvements will include curb, gutter, sidewalks and lighting. An appropriate contribution to a future signal at the intersection of 124th and 42nd will also be included. For background information please refer to the "Transportation Impact. Analysis for the Tukwila Community. Center"., report :dated' November 1995. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. The adjacent Duwamish River is considered a navigable waterway. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. Approximately 1940 trips per day will be generated, 115 peak trips per hour @ 6:OOpm. It should be pointed out that the proposed Community Center will replace the exisiting Community Center which now generates about 500 trips per day. g- Proposed measures to reduce or control transportation impacts, if any: The scheduling of activities at the proposed Community Center will seek to avoid large multiple events. 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. As with any development, police and fire protection will increase as a result of the construction of the Community Center. b. Proposed measures to reduce or control direct impacts on public services, if any. None. 16 Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. -14- b. Describe the utilities that are proposed for the project, the utility providing the service, and . the general construction activities on the site or in the immediate vicinity which might be needed. City Light will provide electric service, Metro will provide sewer service, The City of Tukwila will provide water to the site. c. Signature The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Date Submitted: PLEASE CONTINUE TO THE NEXT PAGE. -15- TO BE COMPLETED BY APPLICANT D. SUPPLEMENTAL SHEET FOR NON - PROJECT ACTIONS Because these questions are very general, it may be helpful to read them in conjunction with the list of the elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage,or release of toxic or hazardous substances; or production of noise? Increased impervious surfaces will likely generate increased surface water runoff to the Duwamish River. Increased vehicular traffic flows will likely increase emissions. There is likely to be no impact from improvements planned in this document in terms of toxic substances or noise. Proposed measures to avoid or reduce such increases are: Use of swales and storm water collection and treatment facilities will aid in dealing with runoff. Increased river storage .and onsite detention of runoff offset added peak flows in the Duwamish. Increased traffic will be partially offset by closing the existing Tukwila Community Center, which currently operates many of the programs planned for the new center. In addition road improvements and contribution to a future traffic light at 124th and 42nd will aid in the smooth flow of traffic around the subject site. 2. How would the proposal be likely to affect plants, animals, fish, or marine life? The site vegetation will be largely removed and replaced with new lawn areas and planting beds. No significant effect to wildlife is foreseen as a result of this project. Proposed measures to protect or conserve plants, animals, fish, or marine life are: River improvements include habitat enhancement and river bank stabilization, which should benefit the aquatic and riparian habitats. 3. How would the proposal be likely to deplete energy or natural resources? The proposed center will use electricity and increased vehicular trips may increase fossil fuel consumption, but the affect on depletion will be negligible. Evaluation for Agency Use Only -16- Proposed measures to protect or conserve energy and natural resources are: Conservation practices will be incorporated into building and heating /cooling system design. 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlandn, floodplains, or prime farmlands? Work on the river bank will result in a more stable soils condition and reduced erosion. The designated historically significant area will be protected from subsurface damage, and saved for study by future generations. Proposed measures to protect such resources or to avoid or reduce impacts are: See the answer above. 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? The project will leave about 70% of the site as open space. In addition the shoreline improvements will preserve the shoreline while increasing public access and recreational opportunity. Proposed measures to avoid or reduce shoreline and land use impacts are: See the answer above. How does the proposal conform to the Tukwila Shoreline Master Plan? This proposal is consistent with existing plan. 6. How would the proposal be likely to increase demands on transportation or public services and utilities? This proposal will increase demarrts through the construction of the new Community Center. Proposed measures to reduce or respond to such demand(s) are: The proposed Community Center is being constructed to meet some of the demands for public services. The Center when completed will meet recreational and meeting needs of the community. Careful scheduling of events to avoid rush hour and peak use traffic generation will help to minimize traffic impacts.' 7_16- j 7 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. This proposal will not conflict with laws at any level. 8. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? If so, what policies of the Plan? No Proposed measures to avoid or reduce the conflict(s) are: Internal review of design proposals by City Officials, Architectural Review by the Architectural Review Board and other required reviews should insure compliance and resolve conflicts. TO BE COMPLETED BY APPLICANT E. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful +.n reviewing the previous items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the. context of the environmental information provided and the submitted plans, documents, supportive information, studies, etc. 1. What are the objectives of the proposal? Provide increased recreational opportunity to Tukwila citizens. Provide a facility to meet the community's needs for meeting and banquet space. Provide a senior adult activity center to serve the seniors of Tukwila. Provide a Community Center which will serve as a sense of pride in the Tukwila community. 2. What are the alternative means of accomplishing these objectives? Update and expand the existing Tukwila Community Center. 3. Please compare the alternative means and indicate the preferred course of action: The existing Tukwila Community Center is an old building in a poor location. The costs of expanding and updating the existing building to meet current needs is more expensive than new construction, and will not address the issue of poor location. 4. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? No Proposed measures to avoid or reduce the conflict(s) Nor-16‘ Evaluation for Agency Use Only 01/23/95 19:06 FAX 206 0— MUCKLESHOOT FISH MUCKLESHOOT INDIAN TRIBE FISHERIES DEPARTMENT Ms Ann Siegenthaler Department of Community Development Planning Division City of Tukwila 6300 Southcenter Boulevard, Suite 100 Tukwila, Washington 98188 fool 23 January 1995 RECEIVED JAN 2 4 1995 DEVEL.OPME(•dT RE: NOTICE OF APPLICATION FOR A SHORELINE MANAGEMENT SUBSTANTIAL DEVELOPMENT PERMIT (L94 -0105) T9 STABILIZE 1,000 FEET OF THE DUWAMISHBLVER (WRIA 09.0001) AT BM 8 Dear Ms Siegenthaler: The Environmental Division of the Muckleshoot Indian Tribe has reviewed the notice of application for a shoreline substantial development permit to stabilize approximately 1,000 feet of the Duwamish River and construct a community recreation center. We are concerned that the City of Tukwila may have underestimated the areal extent of the adjacent Native American cultural site. Walter Pacheco, Community Services Coordinator for the Muckleshoot Indian Tribe Community Services Department should be contacted by the City of Tukwila for comments pertaining to the impacts of this proposal upon Native American archaeological sites and artifacts. The remainder of this letter will discuss the environmental impacts of the proposal, impacts which in many instances can be reduced by changes in the site plan. This project is the fourth bank stabilization project recently proposed within the City of Tukwila. If the City of Tukwila has a long term bank stabilization plan to address erosion and flooding concerns, the Tribal Environmental Division would like to receive a copy of the plan. Though, the impacts of constructing the community center proper are not likely to be significant, pending further review of potential impacts upon archeological resources, the bank stabilization project by itself and in concert with proposed or anticipated bank stabilization projects have the potential to generate significant site specific and cumulative adverse impacts upon adult and juvenile salmonids. The onsite erosion and sloughing creates habitat for both adult and juvenile salmonids. Typically, bank stabilization actions reduce the value of the existing habitat and foreclose the creation of new habitat. Though, this project will attempt to create an 39015 172nd Avenue S.E. • Auburn, Washington 98092 • (206) 931 -0652 • FAX (206) 931 -0752 01/23/95 19:07 FAX 206 VA 0752 v MUCKLESH0OT FISH irregular shoreline to mimic some of the aspects of a natural shoreline, the long term success of such a project is unknown. Furthermore, if active erosion is occurring at the site, the City is proposing to place improvements within the probable migration path of the river. Thus, as the river moves and the proposed bank stabilization is worn away, ongoing repair work will probably eventually turn the irregular bank into the straightened rip rapped bank typical of the lower reaches of the Green /Duwamish River. Given that much of the proposal is within 100 feet of the river, often less than one hundred feet, a long term reductioa.in the amount of large woody debris recruited into the river bank to provide salmonid habitat is probable. As due to the cumulative actions of bank stabilization and land use practices, this section of the river is short of large woody debris of effective size, long term impacts that are both probable and significant are expected. Such long term impacts must be mitigated over the life time of the project. The closer the improved areas come to the river bank, the greater the impacts. To reduce long term foreclosure of large woody debris recruitment and provide the greatest possible period of time before the river migrates into a position threatening site improvements we suggest placing the trail behind the proposed buildings and play areas. This would increase the distance the river must migrate before threatening the proposal with subsequent calls for further bank stabilization work. The project is on the north and east side of the Duwamish River, hence the benefits of any shading created by the riparian plantings will be limited. The City should consider off site mitigation on southwest river banks. Any riparian planting of trees on this side would produce a shadow over portions of the river. The application for the shoreline permit should specify the number of pieces of large woody debris to be installed, the spacing between large woody debris, and the number and nature of the bank irregularities to be created. Without such information, it is difficult to determine if the proposed mitigation measures will compensate for the probable short term and long term significant impacts of this proposal. The application for permit calls for approximately 1,000 feet of stabilization, while conversations with City staff indicate the actual amount stabilized will be less. The permit narrative should specifically state the length of bank to be stabilized or to be benched for this project. This permit should not be written in such a manner that future bank stabilization work is included as part of the instant application. To maintain acceptable salmonid habitat for the greatest possible period of time, the City of Tukwila should be willing to accept bank erosion so long as the erosion does not jeopardize buildings. Furthermore, bank work for repair or maintenance must ' incorporate large woody debris and maintain the irregular shoreline. The Tribal Environmental Division requests to be a party of record for all decisions regarding this shoreline permit application and receive a copy of the shoreline permit, if said permit is issued. 0002 01/23/95 19:08 FAX 206 IP 0752 MUCKLESHOOT FISH I thank you for your attention to our concerns. If you have any questions regarding this letter call me at 931 -0652 extension 119. Roderick Malcom Habitat Biologist . cc: MIT / Walter Pacheco US Army Corps of Engineers Regulatory Branch WDFW / Phil Schneider King County SWM / Andy Levesque City of Tukwila / Randy Berg 1 1003 City of ukwila .44jr V Department of Community Ds its la 199% ENVIRONMENTAL RE File Number yqy. a as. OUTING • FORM TO: � �3C Building El Planning jg Public Works j Fire Dept. MPolice Dept. j Parks /Rec Project: -- SWG�NE r� %'�!T!% C21%1/%/�11��{!�%t'� Address: /4f‘b-hy ,W/-°t!Q..��� j : 12m Ce i 5 lc2e- 4- Date / transmitted: X2 /`3 V Response requested by: / / ? % :6 Staff coordinator: Date response received: The attached environmental checklist was received regarding this project. Please review and comment below to advise the responsible official regarding the threshold determination. • The environmental review file is available in the Planning Department through the above staff coordinator. Please provide • your comments to be forwarded to the Planning Commission, Board of Adjustment and City Council. As the City's representative for this project, I can not add much to the information we have submitted. Shoreline treatment decisions are covered; there is a •pr "obability that only about half of the shoreline area will be modified rather than the entire 1,000 feet of shoreline. We will meet shoreline conditions as required by others. A, walking trail around the entire project site will provide people to view the river•, Date: Comments prepared by: "^-' 03/14/94 City of Tukwila Department of Community Development File Number 4-4714---•0/4 54 SORE' ° .1y- D/ ENVIRONMENTAL REVIEW ROUTING FORM TO: ,(SC Building ❑ Planning Public Works $Fire Dept. XPolice Dept. X Parks /Rec Project: ,.. swa eez„,(4/E r�%1 /� all/PI/al/Pr Address: wboy aar peo `'a%Dh : 40 4 =,i0e4teze t c5• /vp.' V Date transmitted: /2/ OV Response requested by: //9/�5 Staff coordinator: Date response received: The attached environmental checklist was received regarding this project. Please review and comment below to advise the responsible official regarding the threshold determination. The environmental review file is available in the Planning Department through the above staff coordinator. Please provide your comments to be forwarded to the Planning Commission, Board of Adjustment and City Council. RECFIVFD GOMMUrvi ry DEVELOPMENT Date: Comments prepared by: 7�./ / J /76 03/14/94 City of Tukwila Department of Community Development File Number 5584: 1-47.5 /0 gime Lqy-• alas ENVIRONMENTAL REVIEW ROUTING. FORM TO: ;:S8( Building ❑ Planning Public Works %Fire Dept. Police Dept. ,4 Parks /Rec Project: /watt %%ice -- sy/ae /i e- � (A0v /� ceA Address: ,4w iztvi°ea' 'a : .160 weteze i c /aye Date transmitted: /100V Response requested by: / /9/,s Staff .9-01e-S• coordinator: :�received: Date response The attached environmental checklist was received regarding, this project. Please review and comment below to advise the responsible official regarding the threshold determination. The environmental review file is available in the Planning Department through the above staff coordinator. Please provide your comments to be forwarded to the Planning Commission, Board of Adjustment and City Council. RECEIVED 4 la95 • COMMUNITY ra�vFi OP:ENT. ( Date: Comments prepared by: 03/14/94 City of 7 akwila . o Department of Community Development File Number 55e4: /a� S/exe : .qy-- D /05. ENVIRONMENTAL REVIEW ROUTING. FORM TO: Building ❑ Planning Public Works Fire Dept. .Police Dept. XI Parks /Rec Project: rV /L L21M/eav/77, ...._ S .4.-4 E Address: ei/%/ fifezlC.Y! `��- : e,i 7 Date transmitted: �2/3e3M Response requested by: �`9 4.5 Staff coordinator: .� Date response received: The attached environmental checklist was received regarding, this project. Please review and comment below to advise the responsible official regarding the threshold determination. The environmental review file is available in the Planning Department through the above staff coordinator. Please provide your comments to be forwarded to the Planning Commission, Board of Adjustment and City Council. /V o `: /1l --S 10. DEVEL6;: `. r IVIENT Date: VyAc--- Comments prepared by: [3/14/94 City of Tukwila Department of Community Development File Number stq : ra41--=dio54 Slime :41y. aas ENVIRONMENTAL REVIEW ROUTING FORM TO: 18( Building ❑ Planning 1St Public Works $Fire Dept. MPolice Dept. Parks /Rec Project: 71XRUZ•4 Gill/i/e( tirirC tl%r_.: aleeZief/E Address: . 1 f / � � , e'-f � 4 : ' 42' -dorm ez ( c5: 4:74/11, Date transmitted: /2/30V Response requested by: 1/9 4S Staff r coordinator: % � ' Date response received: The attached environmental checklist was received regarding this project. Please review and comment below to advise the responsible official regarding the threshold determination. The environmental review file is available in the Planning Department through the above staff coordinator. Please provide your comments to be forwarded to the Planning Commission, Board of Adjustment and City Council. Olt Date: Comments prepared by: CU/14/04 A F F I D A V I T I , /fila, 411766 fl Notice of Public Hearing ['Notice of Public Meeting D Board of Packet fl Board of Packet Adjustment Agenda Appeals Agenda (Planning Commission Agenda Packet O F D I S T R I B U T I O N ' hereby declare that: fl Short Subdivision Agenda Packet Notice.of Application for Shoreline Management Permit E Shoreline Management Permit Determination of Non - significance 0 Mitigated Determination of • Nonsignificance ODeterxiination of Significance and Scoping Notice O Notice of Action O Official Notice O Other Q Other was mailed to each of•the following addresses DISTRIBUTION: City Clerk Mayor Adjacent - Property Owners • Property Owner (Applicant) Department of Ecology "(Shor.elapds) Muckleshoot Indian. Tribe° Faxed to Seattle Times (Publication on 12 -16 -94 and 12- 23, -94) File cc Name of Project (IIYfmuN l ) d/1/T ' 4 Signature �i.�; 1 /V Iidp W't� 1 - 7/E(Lp/7 '/� File Number L9d - l)1C)5 I✓ on 12- 13 -9�t • NOTICE OF APPLICATION FOR SHORELINE MANAGEMENT SUBSTANTIAL DEVELOPMENT PERMIT ACTIVITY #: L94 -0105 NOTICE IS HEREBY GIVEN that CITY OF TUKWILA has filed an application for a SHORELINE SUBSTANTIAL DEVELOPMENT permit for: Construction of a community recreation and meeting center for the City of Tukwila including 52,000 s.f. of building area, a 350 space parking lot, outdoor park, and 1,000 + /- linear feet of shoreline stabilization. LOCATED AT: 12403 46 AV S within the SE 1/4 OF SECTION 10, TWN. 23, RGE. 4 in Tukwila, King County, Washington. The said development is proposed to be within.200 feet of the Green River /Duwamish and /or its associated wetlands. Any person desiring to express his views'or to be notified of the action taken on this application should notify ANN SIEGENTHALER DEPARTMENT OF COMMUNITY DEVELOPMENT, PLANNING DIVISION, CITY OF TUKWILA, 6300 SOUTHCENTER BOULEVARD, SUITE 100, TUKWILA, WASHINGTON 98188, in writing his interest within 30 (thirty) days of the final date of publication of this notice which is Dec 23, 1994. Written comments must be received by Jan 23, 1995 Published in : Seattle Times - Dec 16, 1994, . 2nd Publication: Seattle Times - Dec 23, 1994 Distribution: City Clerk, Mayor, Adjacent Property Owners, Department of Ecology, Property. Owner, File A F F I D A V I T O Notice of Public Hearing 'Notice of Public Meeting f Board of Adjustment Agenda Packet fl Board of Appeals Agenda Packet O Planning Commission Agenda Packet 0 Short Subdivision Agenda Packet O F D I S T R I B U T I O N hereby declare that: fj Notice of Application for Shoreline Management Permit LI Shoreline Management Permit flDetermination of Non - significance Mitigated Determination of Nonsignif icance JDetermination of Significance and Scoping Notice fl Notice of Action Official Notice Other Other was mailed to each of the following addresses on //23A5 PICA->r "He' (e0/00 7 Name of Project C GW14 afil!S'C R/ File Number City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director January 23, 1995 Dear Resident and Property Owner: The new Tukwila Community Center is coming to your neighborhood! Plans have been drawn up to transform the vacant lot at South 124th and 42nd Avenue South into a new 45,000 square -foot, multi- purpose Community Center. What is still being decided is how the outside of the Community Center will look and feel. Does the building have a hish quality architectural design? Is the landscaping attractive? These and other questions about the Community Center's design will be answered at an upcoming Planning Commission/Board of Architectural Review hearing. The Community Center will be an important focal point for the city as a whole, and especially for your neighborhood. We want to know what you think of the proposed design. You can bring your questions and comments about the new Community Center to two upcoming meetings: • Public information meeting to answer your questions and to get your suggestions on the design. Comments received at this meeting will be forwarded to the Planning Commission. • Planning Commission public hearing to make a final decision on the design. You can make comments in person at the hearing. The meeting schedule is printed on the reverse of this letter. If you can't attend either meeting but have questions or comments, feel free to give me a call (431- 3670). Ann Siegenthaler Associate Planner 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 4313670 • Fax (206) 4313665 Tukwila Community Center OPEN HOUSE City Hall Council Chambers 6200 Southcenter Blvd. Tukwila Wednesday, February 1, 1995 6:00 p.m. to 8:00 p.m. Tukwila Community Center PLANNING COMMISSION/BOARD OF ARCHITECTURAL REVIEW PUBLIC HEARING City Hall Council Chambers 6200 Southcenter Blvd. Tukwila Thursday, February 23, 1995 7:00 p.m. If you can't attend the Open House or Public Hearing, you can review draft drawings and plans of the Community Center at the Tukwila Department of Community Development, 6300 Southcenter Boulevard, Tukwila (431 - 3670). If you have any questions or suggestions on the Community Center design, feel free to contact Ann Siegenthaler, DCD, 431 -3670. Re: 01 -79- 0006 -00 (12245 45th Ave S) Lorene L Mathis 12245 45th Ave S Tukwila WA 98178 Re: 01- 79- 0007 -85 (4518 S 124th St) George G Gomez 4504 S 124th St Tukwila WA 98178 Re: 01 -79- 0007 -45 (12244 45th Ave S) Arthur & Brenda Burrington 12244 45th Ave S Tukwila WA 98178 Re: 01 -79- 0008 -20 (12245 46th Ave S) Resident 12245 46th Ave S Tukwila WA 98178 Re: 01 -79- 0009 -85 (Lot 19 -20 Allntwn Add) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01 -79- 0010 -25 (12253 47th Ave S) Charlie & Rose Marie Ross 12253 47th Ave S Tukwila WA 98178 Re: 01 -79- 0030 -25 (Lot 5 -7 Blk 14 Allntwn) Mackey L White 4615 S 124th St Tukwila WA 98178 Re: 01 -79- 0027 -15, 35, 36 (4609, 4621, 4627 S 125th St) Stephen A Pearce 605 SW Ambaum Blvd Seattle WA 98146 Pam Carter 4115 S 139th St Tukwila WA 98168 Nancy Lamb Foster Community Club 4251 S 139th St Tukwila WA 98168 Re: 01 -79- 0005 -85 (12253 45th Ave S) Roe S Decker 12253 45th Ave S Tukwila WA 98178 Re: 01 -79- 0007 -85 (4518 S 124th St) Resident 4518 S 124th St Tukwila WA 98178 Re: 01- 79- 0008 -10 (12253 46th Ave S) Arben Marku 12253 46th Ave S Tukwila WA 98178 Re: 01 -79- 0009 -65 (12246 46th Ave S) Thomas M Applegate 12246 46th Ave S Tukwila WA 98178 Re: 01 -79- 0009 -95 & 1005 (4610 S 124th St, Lot 23 Allntwn Add) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01 -79- 0030 -05 (4603 S 124th St) Albert D Capellaro 1728 Lake Ave S Renton WA 98055 Re: 01 -79- 0030 -30 (4623 S 124th St) Jacqueline Baca 4623 S 124th St Tukwila WA 98178 Re: 00- 04- 8000 -03 (12600 Interurban) Sammis PCA Partners Saris Regis Group 6755 S 216th St Kent WA 98032 Karen Walter Muckleshoot Indian Tribe Fisheries Dept 39015 172nd Ave SE Auburn WA 98092 Re: 01 -79- 0007 -82 (4504 S 124th St) George G Gomez 4504 S 124th St Tukwila WA 98178 Re: 01- 79- 0007 -55 (12252 45th Ave S) Harry & Arlene Steinberg 12252 45th Ave S Tukwila WA 98178 Re: 01 -79- 0008 -20 (12245 46th Ave S) Daniel C Aragon 4610 S 124th St Tukwila WA 98178 Re: 01- 79- 0009 -75 (12252 46th Ave S) Eldon Knight 12252 46th Ave S Tukwila WA 98178 Re: 01 -79- 0010 -10 (4616 S 124th St) David C Swanson 4616 S 124th St Tukwila WA 98178 Re: 01- 79- 0030 -05 (4603 S 124th St) Resident 4603 S 124th St Tukwila WA 98178 Re: 01 -79- 0027 -00 (4603 S 125th St) Iwao Hirano 4603 S 125th St Tukwila WA 98178 Re: 00 -04- 8000 -02 (12642 Interurban) Seattle City Light Property Mangement 1015 Third Ave Seattle WA 98104 Dorothy DeRodas Duwamish Improvement Club 3910 S 114th St Tukwila WA 98168 Re: U1- 79- 0032 -38 (12400 42nd Ave S) Verline E Harris 5206 25th Ave S Seattle WA 98108 Re: 01 -79- 0000 -80 (12244 42nd Ave S) Resident 12244 42nd Ave S Tukwila WA 98178 Re: 01 -79- 0001 -00 (12258 42nd Ave S) Larry & Evelyn Howe 14548 SE 51st St Bellevue WA 98006 Re: 01 -79- 0001 -40 (12247 43rd Ave S) Curtis J Sweeney 12253 43rd Ave S Tukwila WA 98178 Re: 01 -79- 0003 -00 (12240 43rd Ave S) Sandra Deleza 12240 43rd Ave S Tukwila WA 98178 Re: 01 -79- 0003 -20 (4304 S 124th St) Kim M Anderson 112 5th Ave SW Pacific WA 98047 Re: 01 -79- 0003 -40 (4316 S 124th St) Jeffrey Greenway 4316 S 124th St Tukwila WA 98178 Re: 01 -79- 0003 -65 (12249 44th Ave S) Laurence Weikum 12249 44th Ave S Tukwila WA 98178 Re: 01 -79- 0005 -55 (4408 S 124th St) Jim Joslyn 4408 S 124th St Tukwila WA 98178 Re: 01 -79- 0005 -75 (4426 S 124th St) Resident 4426 S 124th St Tukwila . WA 98178 Re: 01 -79- 0032 -38 (12400 42nd Ave S) Resident 12400 42nd Ave S Tukwila WA 98178 Re: 01- 79- 0000 -90 (12250 42nd Ave S) James & Jessie Baker 19 East Cresta Way Chula Vista CA 91910 Re: 01- 79- 0001 -00 (12258 42nd Ave S) Resident 12258 42nd Ave S Tukwila WA 98178 Re: 01 -79- 0002 -90 (12248 43rd Ave S) Jack Jay Carlson 2024 S 304th St Federal Way WA 98003 -4845 Re: 01 -79- 0003 -15 (12254 43rd Ave S) Phillip E & Charlene Gearhart 219 S 107th St Seattle WA 98168 Re: 01 -79- 0003 -20 (4304 S 124th St) Resident 4304 S 124th St Tukwila WA 98178 Re: 01 -79- 0003 -50 (4318 S 124th St) • Laurie Dearinger 4318 S 124th St Tukwila WA 98178 Re: 01 -79- 0003 -80 (12245 44th Ave S) Gayle M Jacobsen 12245 44th Ave S Tukwila WA 98178 Re: 01 -79- 0005 -65 (4412 S 124th St) . David J Siquaw 4412 S 124th St Tukwila WA 98178 Re: 01 -79- 0005 -35 (12254 44th Ave S) James D Hunley 12254 44th Ave S Tukwila WA 98178 Re: 01- 79- 0000 -80 (12244 42nd Ave S) Ben Kolstad 12238 42nd Ave S Tukwila WA 98178 Re: 01 -79- 0000 -90 (12250 42nd Ave S) Resident 12250 42nd Ave S Tukwila WA 98178 Rc: 01 -79- 0001 -05 (4208 S 124th St) Frederick F Walker 4208 S 124th St Tukwila WA 98178 Re: 01- 79- 0002 -90 (12248 43rd Ave S) Resident 12248 43rd Ave S Tukwila WA 98178 Re: 01 -79- 0003 -15 (12254 43rd Ave S) Resident 12254 43rd Ave S Tukwila WA 98178 Re: 01- 79- 0003 -30 (4306 S 124th St) Cassandra Extine 4306 S 124th St Tukwila WA 98178 Re: 01 -79- 0003 -60 (12253 44th Ave S) Ioan Nistor 12253 44th Ave S Tukwila WA 98178 Re: 01- 79- 0005 -50 (4402 S 124th St) Donald & Juanita Leckband 4402 S 124th St Tukwila WA 98178 Re: 01 -79- 0005 -75 (4426 S 124th St) Robert J Levack 29707 4th Ave SW Federal Way WA 98023 Re: 01- 79- 0005 -25 (12242 44th Ave S) Aaron Prestegaard 12242 44th Ave S Tukwila WA 98178 CHECKLIST: ENV1UNMENTAL REVIEW /SHORELINE PERMIT MAILINGS FEDERAL AGENCIES ( )U.S. ARMY CORPS OF ENGINEERS ( )FEDERAL HIGHWAY ADMINISTRATION ( }DEPT. OF INTERIOR -FISH & WILDLIFE SERVICE (J)U.S. ENVIRONMENTAL PROTECTION AGENCY ( )U.S. DEPARTMENT OF H.U.D. (REGION X) WASHINGTON STATE AGENCIES ( )OFFICE OF ARCHAEOLOGY ( )TRANSPORTATION DEPARTMENT ( )DEPT. OF NATURAL RESOURCES ( )OFFICE OF THE GOVERNOR ( )DEPT. OF COMMUNITY DEVELOPMENT ( )DEPT. OF FISHERIES ( )K.C. PLANNING & COMMUNITY DEV. ( )BOUNDARY REVIEW BOARD ( )FIRE DISTRICT #11 ( )FIRE DISTRICT #2 ( )SOUTH CENTRAL SCHOOL DISTRICT ( )TUKWILA LIBRARIES ( ) RENTON LIBRARY ( )KENT LIBRARY ( )CITY OF SEATTLE LIBRARY ( )US WEST ( )SEATTLE CITY LIGHT ( )WASHINGTON NATURAL GAS ( )WATER DISTRICT #75 ( )SEATTLE WATER DEPARTMENT ( )GROUP W CABLE ( )OLYMPIA PIPELINE ( )KENT PLANNING DEPARTMENT ( )TUKWILA CITY DEPARTMENTS: ( )PUBLIC WORKS ( ) FIRE ( )POLICE ( )FINANCE ( )PLANNING ( )BUILDING ( )PARKS AND ORECREATION ( )TUKWILA MAYOR )DEPARTMENT OF SOCIAL & HEALTH SERVICES )DEPT. OF ECOLOGY, SHORELANDS DIVISION )DEPT. OF ECOLOGY, SEPA DIVISION* )DEPARTMENT OF WILDLIFE )OFFICE OF ATTORNEY GENERAL *SEND CHECKLIST WITH DETERMINATIONS AND *SEND SITE MAPS WITH DECISION KING COUNTY AGENCIES ( )KING COUNTY DEPT. OF PARKS ( )HEALTH DEPARTMENT ( )PORT OF SEATTLE ( )BUILDING & LAND DEV. DIV.- SEPA INFORMATION CENTER SCHOOLS /LIBRARIES ( )HIGHLINE SCHOOL DISTRICT ( )KING COUNTY PUBLIC LIBRARY ( )SEATTLE MUNICIPAL REFERENCE LIBRARY ( )SEATTLE SCHOOL DISTRICTS ( ) RENTON SCHOOL DISTRICT UTILITIES ( )PUGET SOUND POWER & LIGHT ( )VAL -VUE SEWER DISTRICT ( )WATER DISTRICT #20 ( )WATER DISTRICT #125 ( )CITY OF RENTON PUBLIC WORKS (.)RAINIER VISTA ( )SKYWAY CITY AGENCIES ( ) RENTON PLANNING DEPARTMENT ( )CITY OF SEA -TAC ( )CITY OF SEATTLE ( )CITY OF BURIEN ( )TUKWILA PLANNING COMMISSION MEMBERS ( )TUKWILA CITY COUNCIL MEMBERS OTHER LOCAL AGENCIES ( )PUGET SOUND REGIONAL COUNCIL ( )P.S. AIR POLLUTION CONTROL AGENCY ( )SW K.COUNTY CHAMBER OF COMMERCE ( )MUCKLESHOOT INDIAN TRIBE ( )DUWAMISH INDIAN TRIBE MEDIA ( )DAILY JOURNAL OF COMMERCE ( )VALLEY DAILY NEWS ( )METRO ENVIRONMENTAL PLANNING DIV. OFFICE /INDUSTRIAL 5,000 GSF OR MORE RESIDENTIAL 50 UNITS OR MORE RETAIL 30,000 GSF OR MORE ( ) HIGHLINE TIMES ( )SEATTLE TIMES PUBLIC NOTICE MAILINGS FOR PERMITS SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section Applicant Other agencies as necessary (checked off cn attached list) Include these documents: SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Dlstribution (notice was mailed & sent to newspaper). SHORELINE MAILINGS Notice of Application: Notice of application for a substantial development Permit must be mailed to owners and to property owners within 300 feet of subject property, prepare an affidavit of publication, and publish two consecutive weeks with deadline for comments due 30 days after last newspaper publication date. Shoreline Permit: Mail. to: (within 8 days of decision; 30 -day appeal period begins date received by DOE) Department of Ecology Shorelands Section State Attorney General Applicant Indian Tribes Other agencies as necessary (checked off on attached list). Include these documents: Shoreline Substantial Development Permit (3 -part form from Sierra) Findings (staff report, if applicable) Shoreline Application Form (filled out by applicant) Drawings /Plans of project (site plan, elevations, etc. from PMT's) Site plan, with mean high water mark & improvements _ Cross- sections of site w /structures & shoreline Grading plan Vicinity map SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed & sent to newspaper) Affidavit of Publication (notice was published in newspaper). PUBIC NOTICE CITY OF TUKWILA APPLICATION FOR SHORELINE PERMIT Project: Proposal: Location: Applicant: Tukwila Community Center - Shoreline Development Permit #L94 -0105 Construction of 45, 000 -sq. ft. multi - purpose recreational facility on a 12.8 -acre site along the Duwamish River. The project will include indoor and outdoor recreation facilities, offices, child care area, meeting rooms, and senior adult activity center, softball and soccer fields, events plaza, public river trail, and picnic shelter. Other site improvements include a 330 -car parking lot, biofiltration swales, sidewalks and landscaping. Along the riverbank, approx. 110,000 cu. ft of flood storage capacity will be added to the river, with a 15 -foot wide "bench" for maintenance access. Approx. 480 linear feet of riverbank will be regraded, armored with rip -rap, and re- vegetated to improve habitat. An existing area of archaeological significance will be protected from development. 42nd Avenue South and South 124th Street - SE 1/4 Sec. 10, Twn. 23, Rge. 4. City of Tukwila, Parks and Recreation Dept. COMMENTS FROM THE PUBLIC WILL BE ACCEPTED DURING THE 30 -DAY PUBLIC COMMENT PERIOD Comments must be submitted in writing by March 1, 1995, to: Tukwila Planning Department Department of Community Development 6300 Southcenter Boulevard, Suite 100 Tukwila, Washington 98188 For further information, please contact the Department of Community Development at (206) 431 -3670 • F OM :KPFF ENGINEERS SER TO . Consulting Engineers 1201 Thin/ Avenue, Suite 900 Seattle, WA 98101 Phone (206) 622-5822 Fax (206) 622 -8130 • flCEIVED FJ1V 1 8 1994 , I i R -+ KS To Don lei' / /i•r� ins Company Fax # �.3 - / 133.3 Project Tu k,viA. (/t�19i1� • l n Subject of Tik...•. %�-- 2064313655 11:02RM #480 P.01/03 Confirmation # FAX TRANSMITTAL Date Project # 99 9/ a No./Pages (Incl. cover sheet) " -s (CO (206) 622 -se22 if you do not rocoivo all pamos) From (-:1 f .• „?-t 4:9e) Xi- • I�tffhir/ lid's Phone # f'3. • 0/ 79 Description Comments (7i • Ie/ l(5, ' 'j - ¢:3/- 34G6- P/, / - 9 3/ - N'c -s C -a y S.f a/v. - 43/ - 6465 P& 14 c term.; Free( Beek 4))al5 1(i (J j C•( S.10 r; P/'ji/ SG /i it( irltr -3N • /04,6 93/ - 075Z B2 - 3245 .205 3 / 31 3Z1 - 93Z:i A1-14- F R l ovR l i iFogom-tc4 . 4/-/o t2 4 (& RIEcsiveD Nov 21 199` flEVELOPMENT These are transmitted as noted below: Er For your use ❑ As requested ❑ For review and comment CC: Original ❑ Will follow in mail ❑ Will not follow in mail +r FRAM :KPFF ENGINEERS SEA TO 2064313665 94.11 -18 11:08AM 11480 P.02/03 '1'1)KW11.A (.:0MMUNITY CENTER MEE1'IN(; NOTES Ill ?(;AKI)1N(: Shoreline and In -River Storage Issues !MTV. i' November 16, 1'194 • TIME: 11:00 AM LOCATION: City of Tukwila Public Works Dept AT l'1:NI)liliti: 1)on Williams, Clty of Tukwila, Parks k Rea. Dept. Randy Berg, City afTukwila, Dept. of Public Works Phil Eraser. City of'1'ukwila, Dept. of Pnblie Works Gary SchuI7, City of Tukwila, Dept. ol'('otnnnrnit.y Development Rod haalcom, Muckleshoot Fisheries lend Ileck,1Iough Beck K Baird Andy l.evesquc, King County SWM Catherine kc,Mn, KI�FI Randy began will) a Wier project overview and agenda. The intent of the meeting is to determine acceptable riverbank stabilization methods and in -river storage requirements. Rod wanted It) know the rationale for locating the building; adjacent to the river and if alternative. layouts Were considered. Don said many other options were cxplot•ccl and presented to the chinos and planners, The current layout meets City NMI other permitting requirements and fulfills the contmiWCnls made to the public regarding recreational fields. Rod wanted to know if the parking area and building cin,ld be reversed. )tansy's reponse was parking cannot be pinced adjacent lo the river due to shoreline permit requirements. Rod sitnunari'Ard the issues that will be of concern to the. the Mucklesboot 'Tribe. Jn general the Tribe wants In sec no act loss of the fallowing Clements: 1) Juvenile fish migration habitat 2) Adult fish holding habitat 3) Juvenile fish wintering over habitat .luvcaiile nag) tilion habitat includes areas that provide food prior to the stilt wedge. Adult holding habitat and juvenile wintering over habitat include low velocity areas such as bank indentations where fond can he found. Food cent also be found in the mud flats and arena with woody debris and vegetation. 'Traditionally fish would winter -over in side streams oITtlic main channel, however many ofthese art• no longer lheri +so areas within the main channel need to be provided. '1'1►e Mucklcshctoi '1'tihe is also opposed to constructing riprap lined banks because they tend to eliminate out nod Iltrts which tau considered valuable habitat, and produce. less food than naturnlly occurring habitat. lt► an 0110 to Iltittirni7.e impels to the river, the "do nothing" alternative will be explored in as many regions of the bank as possible. Andy proposed pl,:cing logs and /or vegetation nIoii n raised portion ol'il►c: tin: to int.:tease tidal flats rather than excavating the tae to place riprap. 1 Ic also recommended using woody debris and lob;:: to pin the toe of the slope rather than riprap. Anchoring logs and rocks with cnble is discouraged because the cable eventually weals out leaving flayed Cablc ends and unstable habitat features requiring maintenance. .e- • ' ' FF'.OM a KPFF ENGINEERS SER TO 2064313665 894+11 -18 11109RM ##480 P.03/03 Don slat;Iied the• City's stand on public access to the liver is only to provide, visual access from the she and the building. The City does riot want to encourage public access to the river. The only access that may be provided is a launch for hand eau ed boats such as canoes or kayaks Rod snid the Tribe will want to mininlir.G public access and restrict it to non valuable fish habitat areas. The mintage e• t equiremcnt of 10" of precipitation over the added impervious area is a'C pelt ed In comply wilb the Flood l lazard Reduction Policy. Swinge cam be in the Ibrn► of in -river storage, on- site detention o a combination (lithe two The City would 1ikt: to provide as much in -river storage as possible and will supplement it with on -silo detention. The on -site deienticn will most likely be in the. form of parking lot detention rather than under Lund storage. Phil reconmiended using the balltietels (in tleitattitn, lint 1)on is opposed in flooding the seuee, field. Von-situ st0rakc is added flow cannot be rele:as cd from the detention litcility until the river is below the 12.000 e s stage. Ki'1 E will maximize the in river storage and review alternatives for providing, supplemental on -site detention. Don emphasized the City's nppronch ir< to alddtcss the concerns of the Mucklcshoot 'Tribe, the Dept. of Fisheries/Wildlife and King County SWM and weak with these groups to accommodate their requests as mach as possible. These nodes, ptcp;ared by K11147, will stand as an accurate report nfthc mc:cling conlcul, unless cuncclucl. I'Itsc submit cancc(ion; to Catherine Rosa at 622 -S822 within live days. eit: Attended: Stan I.c►kting, ARC Architects Phil Schneider, Wash. St. Dept of laishcrics/Wildlil'c MEMORANDUM TO: Don Williams FROM: Randy Berg DATE: October 31, 1994 RE: Synopsis of Friday Meeting on TCC Shoreline Issues gAtor.&ue j' A meeting was held on October 28th to discuss the TCC development as it relates to the Duwamish River bank. In attendance were Phil Fraser, Gary Schultz, Andy Levesque of King County Surface Water, Phil Schneider of Wash. State Dept. of Fisheries and Wildlife, Fred Beck of Hough Beck and Baird, Catherine Rosa and Ron Leimkuhler of KPFF. Phil Schneider of Fisheries recommended that we have a 100 foot setback from the river, and that this 100 foot zone be devoted to habitat enhancement with limited intrusion by people. He would prefer a 200 foot habitat corridor, but acknowledges that the 40 foot setback required by local code is the governing regulation. Andy Levesque of King County Surface Water pointed out that the County Sensitive Areas Ordinance also requires a 100 foot setback. He also acknowledges that the 40 foot setback required by the City is the actual development requirement on this project. Phil Fraser pointed out that the City plans to stabilize the river bank, and that the stabilized bank will be maintained by the County. Andy responded that the County will maintain the River Bank if the improvements are constructed to King County Standards. King County standards require that the slope of the river bank be eased back to a 2 to 1 slope beginning at the toe of the slope (river bottom). Since it is 25 vertical feet from the top to the toe of the bank the County will need access at mid bank. Andy recommended an 18 foot wide bench between the ordinary high water and the 100 year flood elevation, built heavy enough to support construction machinery. The County will also require a maintenance easement extending 30 feet landward from the top of the bank. Taken all together the County requirements will mean an extensive "no build" Zone. The 2 to 1 slope will move the crown of the hill back about 25 feet. Adding the 18 foot bench, and the 30 foot easement will push us about 75 feet from the river. The existing design will place the building within 60 feet of the river, not to mention the retaining wall for the patio overlook, the proposed picnic shelter and the retaining wall proposed for the senior garden area. If we are to design for the 75 foot no build zone, we will have to start from scratch. The bank stabilization will be beneficial to the fish habitat by eliminated the siltation caused by the slumping bank. The toe of the slope will be rebuilt using raw logs with root balls. Some large rock may also be used. This will create areas for aquatic habitat. The bank will be planted with willow and dogwood facines to provide shading tyrat,'vED and to hold the bank in place. A wildlife corridor will be created along the - G l OCT 3 1 1994 Although this proposal is benign in it's treatment of the river, it may have trouble getting approval from the Muckleshoot Indians. They may have particular trouble with any work in the river, and with the proposed boat launch. It is the advice of King County that we setup a meeting with the Muckleshoots and Duwamish representatives as soon as possible. Andy Levesque and Phil Schneider should also be invited. They also advise us to invite the Army Corps of Engineers so all the players in the permit process will be there. King County indicated that there is some room for compromise on their requirements. Since this project is in the tide zone of the river, they are not overly concerned about flooding, and storm water retention. cc John McFarland Ross Earnst Ann Siegenthaler Phil Fraser OCI. 3 1 1994 CITY OF TUKWILA DEPARTMENT OF COMMUNITY DEVELOPMENT SHORELINE SUBS-( .NTIAL DEVELOPMENT i'E L 5 APPLICATION 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431 -3680 :S:TAFF erence. 1. BRIEFLY DESCRIBE YOUR PROPOSAL:Coi-1yfk1/c114 -4 of A 54 eixt: . ; 00.0,1,o-try 5R 4 N Utk g P' L fi • ( ad1y f di -r r9J Eltr t✓' P l9 2. PROJECT LOCATION: (Give street address or, f vacant, indicate lot(s), block, and sub- division; or tax lot number, access street, and nearest intersection) $ c5 15, IGpi i Ig PI.h-r (421.4p Ake. 5. 5. 12 -4ii -1 5--r) Quarter: 8,e. Section: 1 P Township: 23 Range: o.:1- (This information may be found on your tax statement) 3. APPLICANT:* Name: i4,17`!7. ‘.1 Address. 421Po .5,,,v'r-4G31-4c431 R Lyn; 14140 0 Phone. z1.5) -.°171 ignature: Date: - . . _ _ . .. . * The applicant is the person whom the staff will contact regarding the application, and to whom all notices and reports shall be sent, unless otherwise stipulated by applicant. AFFIDAVIT OF OWNERSHIP 4. PROPERTY Name: C-1-1-{ OF 1 U KL4 OWNER I Address: 62e,o Nc 1.1-i-i�(R (�Lvp,; "Trikki l LA Phone: 433-0171 I /WE,[signature(s) swear that I /we are the ' ner(s) or con fact purchaser(s) of the property involved in this application and that the foregoing statements and answers contained in this application are true and correct to the best of my /our knowledge and belief. Date: gEV1 VE® JAN 201995 comioury, , / DEVELOPivIENT •+ 1 v.:.. —.—.a\ .— •■• - . r.1 \ U1.�111 1 , ri.- 1vM11 • '5. ' Present use of property: ri (`pMh�� 1 ut'C�G i�2P l,.! t'(�i' 17,t i 4 PAP... i g • A - -' 1! - r - _ _ AKA A ko 54— �av /. 6. Total construction cost and fair market value of proposed project (include additional future developments contemplated but not included in this application): if, $ ?pp pmo 7. List the master program policies (use program sections or page numbers) which are applicable to this development r.G' -lot ii - mvl,Lopml4 -r, Atl 1,2.46; PL.! auG - %�C �> Gs t-5 t 4 j • I e eR- /A--T-ToL , 4L t 1.3; 4 1 -rgt G/f u t�-r'U P L_ �.�o s H 2. 8. List any other permits for this project from state, federal or local governmental agencies for which you have applied or will apply, including the name of the issuing agency, whether the permit has been applied for (and if so, the date of the application), whether the application was approved or denied and the date of same, and the number of the application or permit: U.S. G'5 of r i- I S - S TCod- to "1-1 `' PEl t >ri� 14/1.94. *17r cCfPT o f 4A-1-1641 F64 % t b=s- 1- M2RRuu ill J - f4-19P20 L Lawtt -- 5. e. P A• perr .1 A -ttakJ if 11 II - t wri- toHA -1, L) ►I I -, c�t-tt -( 'Oe 14 - C 5- tRtit7rie J Pnirvi t15 C'lr r' Or -(VKltiil t-A - 't,ocP 8G of- 4TrZoL GR I-r 9. Nature of the existing shoreline. Describe type of shoreline, such as stream, lake, marsh, flood plain, floodway, delta; type of beach, such as erosion, high bank, low bank, or dike; material such - -: - -- -as sand, gravel; mud; clay, -rock; riprap; and-extent and type of bulkheading, if any (to be completed-. by local official): 1 ai 4 _ =61ZEL.tt4E th 41414 SAflY 13A+41<& ot: 1 17U104a t -}' E4.024 j `1- 5u,J 6Lou4 l --1L . 1Th pu d MC fl, h%-' 10. In the event that any of the proposed builidngs or structures will exceed a height of thirty-five feet above the average grade level, indicate the approximate location of and number of residential units existing and potential, that will have an obstructed view (to be completed by local official): . PuG{:1 ii E Papripsep 13U I t,D I F4G 14?-1 4T5 At? h5 v4 <it 42-1, �• ��: -.r ■ /J � J1� • F' O . _ tF v ( L irtZIie- ID f) Jk.JGJ I Mt+. ► ►r,4.ua■ ► f i't'LIC,ATION Page 3 _._._.I 11. If the application involves a Conditional Use or Variance, set forth in full that portion of the Master Program which provides that the proposed use may be a Conditional Use or, in the case of a Variance, from which the variance is being sought (to be completed by local official): 12. Give a brief narrative description of the general nature of the improvements and land use within one thousand (1,000) feet in all S I directions from the development site: l2. ,'t e5 F_'4eP K- 1,7Coo is ��AV6V E IJk14 11 AtZN P Afo.5. �'f j ono AsJJ.5 I.nIi '':sr .4_ Ri vcR D4-10Ru RBik! --I Ave, 4v4VJ &`i 511. SM kt.tr MEMORANDUM TO: Ann Siegenthaler, Associate Planner Randy Berg, Project Manager FROM: Gary Schulz, Urban Environmentalist DATE: February 9, 1995 RE: Tukwila Community Center Landscape Plans. I am submitting brief comments for you to include in your plan review. Because there was much involvement with King County and the Muckleshoot Tribe, I had a limited amount of involvement in the bank stabilization design. Also, there are no sensitive area issues for this project. 0 y. River Bank Stabilization Plantings: * To clarify the planting notes, the only shrubs that I have seen planted as cuttings are willow and red -osier dogwood. * 'I'm not sure about Hooker's willow but have seen Pacific willow and Sitka willow documented as somewhat tolerant of saline water conditions. • I recommend removing willows from upper bank and using replacement shrubs such as hazelnut and oceanspray. • Large trees are not recommended on the lower bench (Douglas fir, western red cedar, western hemlock ect.) because this are&. will be flooded. Black cottonwood would be appropriate and certain willow trees; however, King County SWM should be consulted as they are responsible for maintenance of debris in the river channel. • Erosion control seed mix should be considered for the upper bank slope area also. Parking Lot landscape Plantings: • Many native plants are not drought tolerant and most are shade tolerant. As an example, western red cedar and Oregon grape will need special care and maintenance to survive a dry sunny site. RECEIVED FEB 101995 COMMUNITY DEVELOPMENT TCC Memo February 9, 1995 Page 2 Emergents in the bioswale are likely to survive; however, hardstem bulrush is a deepwater habitat plant and not suited for intermittent and shallow inundation. Also, I would recommend using a wetland grass species mix (King County Surface Water Design Manual) for quicker stabilization and use of the bioswale. Bentgrass (Agrostis stolonifera or alba) are well- suited species that have a creeping and low growth form. cc: Steve Lancaster, DCD Director 11/IU l{LESi- QOOT TRIBAL. COUNCIL 39015172ND AVENUE S.E. - AUBURN, WASHINGTON 98002 - [206] 939 -331 23 September 1994 Mr. Don Williams City of Tukwila City Hall 6200 Southcenter Blvd. Tukwila, Washington 98188 Dear Mr. Williams: As you know, the allentown Archaeological Site (45K1431), which is eligable to the National Register of Historic Places, is on City of Tukwila park property. The site is also in the traditional territpry of the Muckleshoot Indian Tribe. We understand that the City of Tukwila may be planning a community center in the vicinity of the Allentown Archaeological Site. we also understand that the City of Tukwila has contracted for additional archaeological testing which was conducted by Historical Research Associatees (HRA) in the fall of 1993 to further delineate boundries of the Allentown Archaeoligical Site. We were not contacted by HRA as part of their study and remind the City of Tukwila that because the Alentown Archaeological Site is a National Register of Historic Places property, the City is required to consult with the Muckleshoot Indian Tribe in conjunction with anyhh decisions made regarding the Allentown Archaeological Site. We also request notification and review of any ground disturbing activities the City of Tukwila may consider for the Allentown Archaeological Site regardless of their assoctiation with the proposed community center or archaeological evaluation. Sincerely, I Virgiffia Cross Muckleshoot Chairperson cc: Dr. Robert Whitlam, State Archaeologist, Office of Archaeology and Historic Preservation. RECEIVED FEB 0 71995 COIVIMUNITV DEVELOPMENT FROM :KPFF ENGINEERS SEA f Consulting Engineers 7201 TrlirdAVCn iC. Sul(a 900 Saatlle, Washington 98701 (206) 622 -5822 Fax ( ?00) 622.0130 2064313665 1P15,02 -08 03:28PM ii900 P.02/08 woo,. 70,w11r. 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Rants, Mayor Department of Community Development Steve Lancaster, Director STAFF REPORT TO THE BOARD OF ARCHITECTURAL REVIEW HEARING DATE: PROJECT: APPLICANT: PROPOSAL: LOCATION: ACREAGE: COMPREHENSIVE PLAN: ZONING: SEPA DETERMINATION: STAFF: Prepared 2/14/95 February 23, 1995 TUKWILA COMMUNITY CENTER Conditional Use Permit #L94 -0089 Design Review #L94 -0088 Special Permission Sign #L95 -0007 ARC Architects, for City of Tukwila Parks and Recreation To construct a 48,000 square -foot community recreation center, including a 327 -stall parking lot, athletic fields and park improvements, landscaping, biofiltration swales, curb gutter and sidewalk, and river bank improvements. 124th Ave. S. and S. 42nd St. in the Allentown neighborhood. Approximately 12.8 acres Parks and Open Space R1 -7.2, Single Family Residential Mitigated Determination of Non - Significance issued 2/8/95 Ann Siegenthaler, Randy Berg 6300 Southcenter Boulevard Suite #100 • Tukwila, Washington 98188 • (206) 4313670 • Fax (206) 4313665 Tukwila Community Center Page 2 ATTACHMENTS: A. Vicinity map B. Photographs of site (to be submitted at hearing) C. Master site /grading plan (C -1) D. Site plan/landscape plan (L-1) E. Parking lot landscaping plan (L-2) F. West site landscape plan (L-3) G. East site landscaping plan (L-4) H. Planting schedule (L-5) I. Site sections J. Riverbank restoration details (C-2) K. Building elevations L. Building elevations M. Building elevations N. Revised rotunda/lobby study O. Revised dormer/light monitor study P. Floor plan (west) Q. Floor plan (east) R. Perspective sketch (to be submitted at hearing) S. Color board (to be submitted at hearing) T. Electrical site plan U. Applicant's response to Conditional Use V. Applicant's response to Design Review W. Design details booklet VICINITY /SITE INFORMATION A. Surrounding Land Uses: On the north and east, the site is bordered by single family residences. Across 42nd Avenue to the west is the Duwamish River, Interurban Avenue, and Highway 599. South of the site is the Duwamish River and the Gateway industrial park development (see Attachment A). B. Existing Development: The site previously has been used for agriculture. Currently a portion of the site is used as a pea - patch/neighborhood garden with a restroom and 15 -car parking lot. The pea -patch and parking lot occupy approximately 1 /5th of the site area, with remainder of the site being vacant (see Attachment B). Tukwila Community Center Page 3 C. Vegetation and Natural Features: The site was previously cleared for agriculture and is now covered with grass and bushes. There are no significant trees. The Duwamish River runs along the south side of the site, creating approximately 980 feet of river frontage. The riverbank has previously been disturbed, and vegetation here consists of canarygrass and blackberries (see Attachment B). D. Project Description: The City of Tukwila proposes to construct a 48,000 sq. ft. multi- purpose recreational facility on a 12.8-acre site along the Duwamish River (see Attachments C, D). This new Community Center will include a gymnasium, racquetball courts, offices, crafts rooms, child care area, meeting rooms, and senior adult activity center. Outdoor recreation facilities will include softball and soccer fields, events plaza, public river trail, and picnic area. An area on the northwest portion of the site has been identified as archaeologically significant, and this area will be protected from development. Other site improvements include a 327 -car parking lot, sidewalks and landscaping. The site will be fully landscaped, with an automatic irrigation system (Attachments E, F, G, H). Most of the project's stormwater will be addressed through an increase in -river flood storage capacity, and a series of parking lot biofiltration swales with oil/water separators. To protect site improvements, and to provide public access and flood storage, the Duwamish River riverbank which fronts on the site will be stabilized, re- contoured, and re- vegetated (Attachments I, J). The riverbank will be restored with native vegetation and large woody debris. A 15- foot -wide "bench" for maintenance access and a public trail will also be provided. The river through this reach is subject to tidal influences. Construction of the above improvements is anticipated to begin in summer 1995, with completion approximately one year later. Tukwila Community Center Page 4 BACKGROUND A. Public Involvement: The community has been informed of the Tukwila Community Center project in several ways: * Public meeting to select the architects; * Board of Adjustment public hearing on Zoning Code Variance; * Status update letter mailed to residents within 300 feet and other interested parties; * Notices mailed to residents within 300 feet; * Notices published in newspaper; * Notices posted on site; * Articles in February 1995 Hazelnut; * Public information meeting 2/1/95. Five residents attended the February public information meeting. Comment sheets for forwarding to the Planning Commission were available at the information meeting; no comments were received. B. Building Height Variance: The Tukwila Zoning Code limits building height to a maximum of 30 feet in the underlying Single Family Residential zone. A variance to this height limit was approved by the Board of Architectural Review on 11/3/94. The Board approved a 46' maximum height for the pitched roof (or 38' mean height). The proposed Community Center has a 45 -foot maximum building height (or 37' mean height). C. SEPA Environmental Determination: The project SEPA environmental review was completed 2/10/95. As conditions of approval, the project was required to add large trees along the shoreline, participate in future street improvements (curb, sidewalk, intersection signal) along 42nd Avenue and South 124th, and to complete negotiations with the Green River Flood Control District for a riverbank access easement. DECISION CRITERIA As a non - residential use in a residential zone, the Tukwila Community Center must obtain a Conditional Use Permit (TMC 18.12.050, under criteria in TMC 18.64.050). Approval by the Board of Architectural Review (per TMC 18.60.050) is also required. Tukwila Community Center Page 5 The Sign Code requires Planning Commission approval of public facility signs in residential zones (TMC 19.32.080). Given the above requirements, the applicant is requesting three approvals: A. Conditional Use Permit approval; B. Design Review approval; C. Special Permission for the design of signs. Accordingly, the staff report is divided into three parts: Conditional Use Permit Criteria; Design Review Guidelines; and Special Permission for Public Facility Sign. Review criteria for each of these approvals are shown below in bold, followed by staffs summary. The applicant's written responses to the criteria are given in Attachments U and V. A. CONDITIONAL USE PERMIT CRITERIA (TMC 18.64.050) 1. The proposed use will not be materially detrimental to the pubic welfare or injurious to the property or improvements in the vicinity of the proposed use or in the district in which the subject property is located. The purpose of the project is to provide a variety of services to the community. Potential conflicts with its residential setting have been addressed in several ways. Perimeter landscaping of shrubs and trees will be used to screen the facility from adjacent residences. The eastern perimeter of the site, where sports fields are proposed, will have additional screening of a 6' high chain link fence covered with ivy. The proposed building occupies a very small portion (approximately 9 %) of the large, 12.8 -acre site, which allows the building to be located the maximum distance possible from adjacent residential areas. In addition, much of the site will remain as open space, providing additional buffering and recreational opportunities in the neighborhood. Biofiltration swales will be added to the parking lot to improve the quality of stormwater runoff to the river, and riverbank improvements are planned to improve aquatic and riparian habitats (see Attachments E, J). The project is subject to Design Review, where other potential impacts can be addressed. Tukwila Community Center Page 6 2. The proposed use shall meet or exceed the performance standards that are required in the district it will occupy. A variance from the 30' building height standard was obtained from the Board of Architectural Review on 11/3/94. The Board approved an additional 8' mean building height (up to 46' maximum building height) for the Community Center. The proposal meet the Board's approved height. The proposed building will be located on a large site, with setbacks which greatly exceed the standards of the Single Family Residential zone. The proposal includes 10- foot wide landscaping buffers near residential uses, and internal and perimeter landscaping of the parking lot. There are no such landscaping requirements in the Single Family zone. 3. The proposed development shall be compatible generally with the surrounding land uses in terms of traffic and pedestrian circulation, building and site design. The proposed Community Center will generate approximately 1940 (970 in, 970 out) vehicle trips per day to roads in the project area. Vehicles will use two driveways into the site, one from 42nd Ave South and the other off of South 124th St. Street improvements are not part of this proposal. The City's 1995 budget provides for the design (but not installation) of future street improvements and a signal at the intersection. Both entry driveways will include pedestrian crossings. Pedestrian links will connect the Community Center to the adjacent convenience store, nearby residences, and the Green River Trail system. Sidewalks are not part of the project proposal, but are expected to be completed by the City at a later date. The Community Center will have limited hours, typically from 6:00 a.m. to 6:00 p.m. Monday through Saturday. Scheduling of outdoor athletic events will be restricted to daylight and early evening hours. The building and main entrance are located as far as possible from residences. Landscape buffers will be provided where single family residences abut the site. The entire project will be subject to public review, and required to meet the building and site design guidelines of the Board of Architectural Review. 4. The proposed use shall be in keeping with the goals and policies of the Comprehensive and Use Policy Plan. The use of the site for a Community Center and municipal park is consistent with Tukwila's current Comprehensive Plan which calls for recreational use on this site. The draft Comprehensive Plan (5/94) designation is for Public Recreation. Tukwila Community Center Page 7 5. All measures have been taken to minimize the possible adverse impacts which the proposed use may have on the area in which it is located. The proposed site plan, building design and landscaping reduce most, but not all, potential impacts (see Criteria #3, above). There is an opportunity to address other potential impacts during the Design Review process. CONDITIONAL USE PERMIT CONCLUSIONS: 1. The proposed use will not be materially detrimental to the public welfare.... Landscape screening and fencing, maximum building setbacks, the large amount of open space provided, and water quality and habitat enhancement features help ensure that this non - residential project fits well into the neighborhood. Through the provision of community services such as recreation and social services, the proposal has the potential to greatly benefit the public. In addition, this large -scale project has the potential to affect the aesthetic character of the neighborhood. The building design has attempted to minimize adverse impacts by using residential forms and scale, using harmonious colors, and locating the building away from residences. Through the public Design Review process, there will be opportunities to address screening and aesthetic issues in detail. 2. The proposed use shall meet or exceed the performance standards that are required in the district... The proposed Community Center exceeds the setback and landscaping standards of the underlying residential zone. In addition, it will provide amenities which benefit the neighborhood and the larger community. 3. The proposed development shall be compatible generally with the surrounding land uses... Traffic generated by the proposed Community Center will be greater than for typical residential uses. However, it is expected that traffic volumes will be similar to that of a church or school, uses also allowed as conditional uses in Single Family zones. Tukwila Fire and Public Works Departments have approved the proposed traffic and circulation patterns. Tukwila Community Center Page 8 As sidewalks are not part of the current proposal, there is some uncertainty as to when sidewalks will be constructed. Given the volume of truck traffic along 42nd Avenue and South 124th, and the volume of anticipated Community Center visitors, this is a potential safety issue. Sidewalks are essential for pedestrian safety, and should be installed prior to the facility's public opening. The proposed building design, site plan, landscaping and screening are generally compatible with the surrounding area. The specific way in which potential impacts are addressed can be resolved through the Design Review process. 4. The proposed use shall be in keeping with the goals and policies of the Comprehensive Plan. The proposed community center is consistent with the existing and proposed Comprehensive Plan and generally is consistent with the policies which require protection of single family residential areas. 5. All measures have been taken to minimize the possible adverse impacts which the proposed use may have on the area in which it is located. The proposal attempts to satisfy all aesthetic and landscape screening concerns. The building design has attempted to minimize adverse impacts by using residential forms, scale and materials. The surrounding neighborhood, as well as the larger community, will benefit from increased recreational opportunities, social services, and site amenities. The Design Review process provides an opportunity to address screening and aesthetic issues in detail. CONDITIONAL USE PERMIT RECOMMENDATIONS: Due to the fact that the project generally meets the criteria, staff recommends approval of the Conditional Use Permit, with the following condition: 1. Sidewalks along 42nd Avenue South and South 124th will be completed prior to the Community Center opening to the public. Tukwila Community Center Page 9 B. DESIGN REVIEW CRITERIA (TMC 18.60.050) 1. Relationship of Structure to Site. The site should be planned to accomplish a desirable transition with the streetscape and to provide for adequate landscaping and pedestrian movement. Parking and service areas should be located, designed and screened to moderate the visual impact of large paved areas. The height and scale of each building should be considered in relation to its site. The site plan locates the building close to the river and away from residential areas (see Attachment D). Perimeter landscaping is provided to buffer residential areas. In addition, the large parking area proposed is fully screened with landscaping. The truck loading/dumpster area is located to the side of the building, behind landscaping. On site pedestrian circulation has been designed to mesh with existing pedestrian patterns and future patterns anticipated when the Green/Duwamish River Trail system is complete. In the proposed site plan, the community center building is located away from surrounding residential uses. This minimizes impacts of scale and massing on surrounding properties. The building is oriented both to the parking area and the river. Interior spaces attempt to take advantage of the river as an amenity by providing views. Terraces off the senior center and main lobby allow interior spaces to expand outside on the river side. The building entrances all address the parking area and invite the public into the main entrance. The functional requirements of the gymnasium require building to a height and scale which exceeds common residential standards. However, the building is located as far from adjacent residences as possible, without creating conflicts with the shoreline. The design emphasizes the main building entrance with an entry rotunda, and a site design which radiates from this rotunda, which organizes site circulation and gives users a sense of where the entry is (see Attachments K, L). The main entrance serves a focal point to the site plan, and the orientation of the main entrance allows combined access for both cars and pedestrians. The plan also accommodates the typical motorist use of passenger drop off and pick up at the main entrance. On site pedestrian trails and park amenities provide for passive recreation at the river's edge. 2. Relationship of Structure & Site to Adjoining Area. Harmony in texture, line and masses is encouraged. Appropriate landscape transition to adjoining properties should be provided. Public buildings and structures should be consistent with the established neighborhood character. ( Tukwila Community Center Page 10 - Compatibility of vehicular and pedestrian circulation patterns and loading facilities in terms of safety, efficiency and convenience should be encouraged. - Compatibility of on -site vehicular circulation with street circulation should be encouraged. The proposed Tukwila Community Center site is surrounded by the Allentown residential neighborhood to the north and east, and by the river and industrial and commercial uses to the south and west. To fit the surrounding environment the community center design must relate to single family residences which most closely relate to the site in terms of context. The design also attempts to create a "civic monument" (see Attachments K, L, M). This creates a design conflict which has been resolved by increasing the scale of the building entry while reducing the scale of the remainder of the other building elements (with the exception of the gymnasium). The applicant has chosen a theme for the building which relates to agriculture and residential design metaphors. Durable exterior materials in earth tones are proposed, which are compatible with the subdued character of nearby residences. The landscape plan provides buffers next to residences, while the "public" sides of the site are more open. Vehicle access is from the north or west via two driveways, and entry walks access the site from the north, east and west. The building and site are handicapped accessible. The Tukwila Public Works and Fire Departments have reviewed and approved the proposed circulation. 3. Landscape and Site Treatment. - Where existing topographic patterns contribute to beauty and utility of a development, they should be recognized, preserved and enhanced. Grades of walks, parking spaces, terraces and other paved areas should promote safety and provide an inviting and stable appearance. - Landscape treatment should enhance architectural features, strengthen vistas and important axes, and provide shade. - In locations where plants will be susceptible to injury by pedestrian or motor traffic, mitigating steps should be taken. Where building sites limit planting, the placement of trees or shrubs in paved areas is encouraged. Screening of service yards and other places which tend to be unsightly should be accomplished by the use of walls, fencing, planting or combinations of these. Screening should be effective in winter and summer. - In areas where general planting will not prosper, other materials such as fences, walls, and pavings of wood, brick, stone or gravel may be used. Exterior lighting, when used, should enhance the building design and the adjoining landscape. Lighting standards and fixtures should be of a design and size compatible with the building and adjacent area. Lighting should be shielded, and restrained in design. Excessive brightness and brilliant colors should be avoided. Tukwila Community Center Page 11 An important component of major public buildings is a main entry which is visually strong and provides a memorable procession to the facility from the street. The site plan of the proposed community center attempts to create an entry sequence which meets this need. The main building feature is the entry rotunda. The remainder of the site features build from this focal element (see Attachment D). The parking lot is designed with a radial shape, which "funnels" visitors to the main entry. This helps to strengthen the relationship of the parking lot to the building entry. Pedestrian corridors, with alternate paving details, improve safety and emphasize the radial pattern. A flag plaza is incorporated into the entry sequence to provide a sense of arrival before the more formal entrance into the lobby. Brick pavers at building entries, a covered entry canopy complete the procession. Another important feature of public buildings is quality outdoor spaces. The Community Center proposal provides several outdoor gathering areas both in the athletic areas as well as in the more private terrace areas on the river side of the building. The site plan identifies 3 to 4 areas which can accommodate future art work. The flag plaza is seen as a place for both gathering and for potential art work. Proposed landscaping includes perimeter screening with shrubs and large stature trees, and naturalistic plantings in parking lot bioswales (see Attachments E, F, G, H). The river side of the project is kept relatively free of trees in order to maintain views of Mt. Rainier and the river (see Attachment 1). The dumpster /recycling surround is constructed of materials which relate the building architecture. Handicapped parking areas are located adjacent to the senior center entrance while remaining close enough to the main entry to provide easy access to the lobby. Site lighting will be provided by 20 foot double and single fixture pole lights in the parking lot (see Attachment T). Site walkways from the parking area will be provided by bollard lights, casting light down to the walking surfaces, and clearly defining pathways from parking to the main building entrance. Additional lighting at the entries will come from ground mounted up lights casting light up the portico columns and highlighting the building architecture. 4. Building Design. ▪ Architectural style is not restricted, evaluation of a project should be based on quality of design and relationship to surroundings. ▪ Buildings should be to appropriate scale and be in harmony with permanent neighboring developments. Tukwila Community Center Page 12 ▪ Building components, such as windows, doors, eaves, and parapets, should have good proportions and relationship to one another. Building components and ancillary parts shall be consistent with anticipated life of the structure. ▪ Colors should be harmonious, with bright or brilliant colors used only for accent. ▪ Mechanical equipment or other utility hardware on roof, ground or buildings should be screened from view. Exterior lighting should be part of the architectural concept. Fixtures, standards and all exposed accessories should be harmonious with building design. ▪ Monotony of design in single or multiple building projects should be avoided. Variety of detail, form and siting should be used to provide visual interest. Exterior materials and colors: The Tukwila Community Center's exterior will have a combination of materials (see color board, Attachment S; colored elevations will be provided at the hearing). A goal is to provide a building which will retain a high -quality appearance over time. Brick veneer and wood siding with prefinished metal roofing predominate the design. Brick is used at ground level to enhance the durability of the structure. The selection of colors has attempted to avoid trendy colors which will date the building in the future. Instead, the building design uses earthy colors and colors within the "northwest palette" to create an impression of indigenous architecture. Another project goal is to reduce long term maintenance costs; so, for example, the metal roof has a permanent factory applied finish which will reduce maintenance. Detailing: The applicant has revised the building design several times in order to provide better detailing and architectural interest. This has been accomplished in several ways. In most areas, brick is used as wainscotting, being held to a height of 4 feet. At the gymnasium the brick is continued to a height of 12 feet to break up the large expanses of the gym facades. The gym also incorporates wide vertical trim against horizontal siding, which provides a subtle pattern to the gym wall. Materials change, depending upon the function and location of the architectural element. For example, the social wing of the building, which houses the senior center, banquet and meeting spaces uses more wood siding, in order to create a more informal and more inviting exterior. The main entry rotunda is entirely of brick, further distinguishing it from other elements. Tukwila Community Center Page 13 To modulate the long facades of the building wings, the exterior line of the building extends outward at exterior doors and window areas. For example, there are window bays at the arts and crafts rooms. These bays are contrasted with the wall behind through the use of flat roofs and horizontal wood siding, as opposed to the pitched roofs and vertically- applied siding used elsewhere. These elements are also finished in a lighter color to further articulate and break the large building size down to residential scale. The building's large roof areas are modulated and broken down in scale by adding dormer -type skylights (or "light monitors ") over the interior hallways at all room entries. Besides breaking down the scale of the large expanses of roof areas, these dormers denote entry to rooms in the building interior. They provide a rhythm to the roofline, and repeat patterns found elsewhere on the building. The original design of the dormers has been slightly revised, as shown on Attachment 0. Rooftop mechanical equipment over the racquetball courts is screened with the same vertically applied siding used on most of the building exterior walls Entry rotunda: The key feature of the Community Center design is the entry rotunda. It is the feature around which most of the design is organized. From the round, main rotunda, the architect has extended an east and west wing. This creates an "elbow" in the building, which directly relates to the radial- shaped parking lot, and which bends out toward the river and distant views. In this way the rotunda ties the building to the site and.gives the building users clear direction in how to approach the building. Some aspects of the rotunda have been revised subsequent to the application submittal. The roof overhang has been extended, and the covered entry canopy has been enlarged (see Attachment N). Building lighting: The large glass skylight over the rotunda/lobby is thought of as a beacon to the community inviting them to enter and explore the facility. The roof top monitors will also cast light outward at night (as well as casting light inward during the daylight hours) further articulating the ongoing uses within the facility. Columns and exterior walls at the entries are lit using ground mounted up lights to give accent to these important elements and invite users to the entries. Tukwila Community Center Page 14 5. Miscellaneous Structures & Street Furniture. - Miscellaneous structures and street furniture should be designed to be part of the architectural concept of design and landscape. Materials should be compatible with buildings, scale should be appropriate, colors should be in harmony with buildings and surroundings, and proportions should be to scale. - Lighting in connection with miscellaneous structures and street furniture should meet the guidelines applicable to site, landscape and buildings. Some site furnishings are provided in the proposed Community Center design. For example, plans show benches at the main entry, a bike rack at the fitness entry, and picnic tables near the river. Bleachers will be provided at the softball field. To promote the use of recycled materials, benches, trash receptacles and other site furnishings will be of recycled materials. DESIGN REVIEW CONCLUSIONS: 1. Relationship of Structure to Site. Proposed landscaping, walkways, parking lot and building location generally provide an appropriate transition to the street. Screening of service areas, parking lot and buffering of adjoining residences is included in the site plan. The height and scale of the building are appropriate for the site and compatible with surrounding uses. Although the gym and entry rotunda are not of a typical residential scale, proposed setbacks and locating the building away from residential areas resolves this potential conflict. The entry is clearly defined and gives users good orientation on how to access the facility. The site walkways and parking lot funnel users to the main building entrance. 2. Relationship of Structure & Site to Adjoining Area. The building generally fits its neighborhood setting. Building scale and forms attempt to relate to surrounding residential uses. Perimeter landscape screening is used to buffer residential uses which directly abut the site. Street trees are used to enhance the transition from right of ways while maintaining good visibility of the site for security reasons. Site landscaping includes development of active and passive recreational opportunities. Vehicular & pedestrian circulation is generally logical and safe. Since the site will also house the Tukwila Senior Center barrier free parking is provided with good access to the senior entry. Walkways from the parking area are oriented to the main entrance, and are enhanced with special paving patterns and landscaping. Tukwila Community Center Page 15 The arrival sequence is enhanced with the landscaped flag plaza as the user approaches the main entry. 3. Landscape and Site Treatment. The applicant has provided, in general, a quality landscape plan. The perimeter is adequately screened, natural features are enhanced, and quality outdoor public spaces are provided. The site plan creates an appealing processional experience from the street to the entry lobby, and a high quality "people place" at the entry. Lighting is adequate for public safety and will provide attractive accents to the building and site design at night. However, the plan needs additional refinement in a few areas. To better respond to the pedestrians approaching from 42nd Avenue, the site plan should include another path. This path should run from 42nd Avenue around the edge of the demonstration compost garden, to the main building entry. Handicapped stalls located close to the main entry drive may create potential conflicts with entering traffic. Also, concentrating all handicapped stalls here tends to discourage use of other building areas. To better serve less -abled visitors, a minimum of 2 handicapped stalls at the main entry drive on 42nd Avenue should be relocated to the fitness wing entrance. With the possible exception of native plantings subject to inundation at the riverbank, all landscaped areas should be irrigated. There should be provision for at least temporary irrigation of native plant areas. This help ensure long- term plant survival throughout the project's lifetime. The applicant has agreed that these revisions would be desirable. 4. Building Design. The Tukwila Community Center will be an important and highly visible civic facility serving the citizens of Tukwila for years to come. Recognizing this, the applicant has attempted to design a building which denotes the sense of "civic place" appropriate to the importance of the building to the community. For example, the community center has a strong entry element and design concept which is inviting to the community. At the same time, the project is generally sensitive to its residential neighborhood location. It also takes advantage of the river front setting. The applicant has made many revisions in order to continually improve the building's design. The most recent revisions (Attachments N, 0) are an example. Proposed revisions to the entry rotunda make the rotunda much more effective as a main entry. The covered canopy will be provide an Tukwila Community Center Page 16 inviting "processional experience" to the Community Center. The rotunda's added roof overhang and covered canopy together "anchor" the rotunda to the rest of the building. Similarly, proposed revisions to the dormers improve the design. Dormers are still effective, but have been scaled down, to be more compatible with the overall building scale. The proposed Community Center design provides a high degree of attention to detail. It uses high quality materials which have a durability and richness suited to an important civic structure, and which respond to the building's historical and site context. S. Miscellaneous Structures & Street Furniture. Further refinement of main public areas with site furnishings would improve these areas. This would also enhance the passive recreation opportunities on the site. DESIGN REVIEW RECOMMENDATIONS: Staff recommends that the Tukwila Community Center be approved with the following conditions. Refinements should be made by the applicant and submitted to staff for administrative approval. 1. To better respond to the pedestrians approaching from 42nd Avenue, the site plan shall include a path from 42nd Avenue to the main building entry. 2. To provide better handicapped access, a minimum of 2 handicapped stalls at the main entry drive shall be relocated east of the entry rotunda, closer to the fitness wing entrance. 3. Automatic irrigation shall be provided for all planted areas, except for the native riverbank plantings where irrigation shall be optional. Tukwila Community Center Page 17 C. SPECIAL PERMISSION: PUBLIC FACILITY SIGN CRITERIA (TMC 1932.080) Single Family Zones: Home Occupation, Church, Approved Conditional Use and Public Facility Signs. (C) Public facilities may have one sign for each street upon which the property fronts; signs shall be located in the setback area or upon the face of the building. Total area of sign shall not exceed 60 square feet per face; maximum height above ground when in setback area shall not exceed sixteen feet; minimum setback shall be eight feet; and base of sign shall be located in a landscaped area...Illuminated signs shall use indirect, concealed sources, or backlighted letters on an opaque background. All signs in Subsection 1932.080 (C) must be approved by the Planning Commission. Two freestanding monument signs are proposed for the Community Center site (see Attachment M, elevation A3.3). They are each 45 s.f. in area, and three feet in height. Materials used for the signs will be: brick base (to match the building's brick), and cast metal channel letters with a chrome finish. The signs will be located in accent landscaping at the site entry drives (see Attachment D). No special lighting is proposed for the signs. SPECIAL PERMISSION SIGN CONCLUSIONS: The freestanding signs are in visible and logical locations. By incorporating elements similar to those found in the building, the signs are integrated with, and complement the building architecture. While no special lighting is proposed, site lighting should be adequate for sign visibility. SPECIAL PERMISSION SIGN RECOMMENDATIONS: Staff recommends approval of the 2 freestanding signs as submitted. City of Tukwila Department of Community Development 23rt -ep'e&a s- (ZL John W. Rants, Mayor HEARING DATE: FILE NUMBER: APPLICANT: REQUEST: LOCATION: ACREAGE: COMPREHENSIVE PLAN DESIGNATION: ZONING DISTRICT: ATTACHMENTS: • STAFF REPORT to the Board of Adjustment Prepared October 24, 1994 Rick Beeler, Director November 3, 1994 L94 -0087: Tukwila Community Center City of Tukwila An 8 -foot .height variance for the :proposed community center Allentown P -Patch (SW corner of 42nd Avenue South & 124th Street) 12.8 acres Parks and Open Space R -1 - 7200 Single Family Residence (A) Site Plan with vicinity map (B) Floor Plan (C) Elevations, option "A" (D) Section dated 9/19/94 (E) Topography (F) Applicant Responses "50L7 5e; / Cry, 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 4313665 Staff Report to the Board of Adjustment FINDINGS VICINITY/ SITE INFORMATION L94 -0087: Tukwila Community Center Page 2 • 1. Project Description: Construction of a 52,000 square foot full- service community center, containing a gymnasium, gallery space, fitness room, dance studio, racquetball courts, locker rooms, recreation offices, reception space, meeting and banquet spaces, arts and crafts spaces; and a senior adult activity center. Also contained in this project is installation of a 350 -stall parking area, landscaping, and several types of outdoor recreation areas. These include a demonstration garden and sports fields. The adjacent river bank area will be improved with an extensive set of public facilities such as a riverside jogging trail, viewing 'terraces, community event areas, canoe launch and a river habitat interpretive area. 2. Existing Development: The site is presently vacant, but contains P- patches (public gardens) adjacent to 42nd Avenue South. 3. Surrounding Land Uses: West and South: Duwamish River with industrial uses beyond. East and North: Public roads with single family residences beyond. • The northwest corner of the site is in private ownership and is used for a small convenience -type store. 4. Terrain: The site is essentially flat except at the Duwamish River, where the bank drops approximately 15 feet to the line of ordinary high water. The site contains a floodplain along this steep bank. This was established by the Federal Emergency Management Agency (FEMA), which set the plain at an elevation of 11 -12 feet. This is 6 -8 feet below the rest of the site. BACKGROUND 1. The concept for the center's design was accepted by the City Council on the recommendation of the Parks Commission. The building consists of two wings connected by a centrally - located entry rotunda. The west wing contains multi- purpose rooms and the senior facilities. The east wing contains the gymnasium and an indoor running track. The rotunda and its gallery area contain a reception area, a small pro -shop and a snack bar. Staff Report to the L94 -0087: Tukwila Community Center Board of Adjustment Page 3 BACKGROUND (continued) An essential part of the concept is the use of sloped roofs, which give the . proposed structure a more residential appearance, in sympathy to the northerly and easterly single family neighborhood. The site design also calls for providing extensive outdoor improvements, both in the form of facilities such as parking and play fields, and in the form of shoreline enhancements such as the trail area 2. In order to provide necessary facilities, the gymnasium contains a set of competitive volleyball courts. Recognized standards for gymnasia require a minimum interior clearance of 28 feet, which permit volleyball. 3. In order to provide necessary scale, the entry rotunda is designed at a height that allows the visitor to immediately identify it as being the main entrance. This rotunda will display the old school bell from the City's historic Duwamish school house, previously located four blocks away. 4. Both the proposed rotunda /gallery space and the gymnasium are designed to be 38 feet above average finished grade. This height is 8 -0" above the 30 foot limit established in the City's R -1 single family zoning district. Both the rotunda /gallery space and the gym are a minimum of 300 feet from adjacent rights-of-way,, :The gymnasium wing is located furthest from these streets. The entire complex is set back a minimum of 55 feet from the shoreline, which is more than required by the applicable Shoreline Master Program. 5. Tukwila Municipal Code Title 18 is the City's zoning code. Chapter 72 describes the variance permit process, which allows a proposed project to "vary" from the strict requirements of the code. The chapter states its purposes and then lists five conditions for granting a variance, all of which must be met. Permits are approved by the Board of Adjustment, following a public hearing. 6. During the separate sets of public reviews described below, citizens have ample opportunity to request conditions of approval that are necessary to reduce any impact of the proposed center, whether on adjoining properties or elsewhere in the community -- Chapter 64 of the zoning code describes conditional uses of the land, which are-.ones that can be approved after meeting certain tests. The proposed community centenis a conditional use. All others in the R -1 zone are public facilities such as schools, ;churches, and galleries. Permits are approved by the Planning Commission, after a public;;hearing on the proposal. Conditions of approval accompany any such permit. - Staff Report to the L94 -0087: Tukwila Community Center Board of Adjustment Page 4 -- Chapter 60 of the zoning code requires the City's Board of Architectural Review to hold a public hearing on the design of the proposed building and its site plan. - -The City's Shoreline Master Program also requires the City's Planning Commission to review a proposed substantial development permit for portions of the project which are within 200 feet of the Duwamish River. In this case, the entire building and most of the project's open areas are affected by these shoreline regulations. - -The State Environmental Policy Act (SEPA) requires this project to be reviewed for its effects on the environment. The review may require specific measures to be taken to reduce significant adverse impacts. 7. The site's southern edge is bordered by the Duwamish River, and is affected by the 100 -year flood plain established by the Federal Government. The area consists of a narrow strip of land, marked by the 12 -foot elevation line. The bulk of the site, and all proposed improvements are located above this elevation. DECISION CRITERIA The Board of Adjustment may approve permits for variances from the zoning code. In the case of this application the Board of Adjustment must find that a grant of the variance is not contrary to the public interest and would otherwise result in an unnecessary hardship. The five applicable TMC variance criteria are listed below in bold typeface followed by pertinent findings of fact prepared by the Department of Community Development. The Board must find that all five of the following criteria exist: Applicant Responses to these criteria are contained in attachment F. Criteria 1. TMC 18.72.020 (1) - The variance shall not constitute a grant of special privilege inconsistent with the limitation upon uses of other properties in the vicinity and in the zone in which the property on behalf of which the application was Med is located. The additional 8' -0" height sought by the variance, allows an interior height of 28 feet, which is the minimum requirement for regulation volleyball. The sloped roof of the structure can not be set lower without interfering with volleyball play. The variance also benefits the proposed main entrance to the center by establishing a visually effective height to match the bulk and scale of the overall community center complex, and by providing adequate visual identification of the main entry to the facility. Staff Report to the L94 -0087: Tukwila Community Center Page 5 Board of Adjustment DECISION CRITERIA (continued) In Tukwila, schools are allowed as a conditional use in residential zones. They have gymnasia that exceed the usual zoning limitations in order to provide necessary activities such as for volleyball. The grant of a height variance for a community center is similar to one for a school. In this case, the Board of Adjustment granted variances of up to 15 feet for structures in the Foster High School complex, specifically including the school's main gymnasium. All other R -1 properties such as galleries and churches have the same entitlements for such conditional uses. They have the same obligation to follow Board of Architectural Review procedures for the facility's design, and they have the same obligation to meet conditions imposed by the Planning Commission for the actual conditional use permit. Ample opportunities thus exist for public review and for establishment of appropriate conditions of approval of the final design of the center. Criteria 2. TMC 18.72.020 (2) - The variance is necessary because of special circumstances relating to the size, shape, topography, location or surrounding of the subject property in order to provide it with use rights and privileges permitted to other properties in the vicinity and in the zone in which the subject property is located. Flood Control requirements are special circumstances related to the location of the subject site. The proposed community center is adjacent to the 100 -year flood zone of the Duwamish River. The FEMA flood elevation of 12 feet establishes the expected height of such a 100 -year flood. FEMA regulations also require the first floor of any habitable building in the 100 -year flood zone to be at a minimum of one foot above this level, or in this case 13 feet. As an additional protection Tukwila Public Works staff have required the center's first floor to be built an additional foot higher, at 14 feet. This sets the minimum height for the facility at 38 feet; it cannot be built any lower in the site than this point. Even if portions of the structure could be placed below grade in an attempt to meet the 30 foot height limitation set by the R -1 zoning, the result would be unsatisfactory from the perspective of operational management such as creation of ramps for handicapped access and other compliance with the Disabilities Act. Costs for de- watering the site and flood proofing the building would also become a major hardship in providing the facility. Staff Report to the L94 -0087: Tukwila Community Center Board of Adjustment • Page 6 DECISION CRITERIA (continued) While the ground elevation is set by FEMA, the interior height of the gymnasium is set by national volleyball standards. The roof of the building can not be set lower without eliminating a vital component of the facility. Although this 28 foot ceiling height requirement is not a site - imposed special circumstance, it is, like FEMA regulations, one set by another governing body over which the applicant has no control. Criteria 3. TMC 18.72.020 (3) - The granting of such variance will not be materially detrimental to the public welfare or injurious to the property or improvements in the vicinity and in the zone in which the subject property is situated. Any community center embodies the concept of benefitting the public welfare. Granting an 8' -0" height increase to parts of this building on such a large a parcel complements the property and enhances the improvements in the vicinity. Locating the rotunda /gallery and the gymnasium several hundred feet from adjacent public rights of way minimizes any adverse visual impacts.. Providing the range of shoreline and•recreational benefits described earlier further adds to the public benefit. Given the additional public review processes mentioned earlier, the public welfare will be protected. Planning Commission conditions, Board of Architectural Review conditions, and State Environmental Policy Act (SEPA) conditions all provide ample opportunity for ensuring a positive impact on the property and the neighborhood. Criteria 4. TMC 18.72.020 (4) - The .authorization of such variance will not adversely affect the implementation of the comprehensive land use policy plan. The proposed center conforms to several goals and policies within the City's comprehensive plan. Natural Environment Goals 2 & 3 state: Goal 2: Use and preserve the natural features and resources of the physical environment in a wise and posterity - oriented manner." Goal 3: "Protect and enhance the natural amenities and aesthetic resources of the Tukwila area for the public's welfare." Extensive shoreline improvements and recreational facilities throughout the 12.8 acre site both use and preserve natural features. Staff Report to the L94 -0087: Tukwila Community Center Board of Adjustment Page 7 DECISION CRITERIA (continued) Open Space Goals 1, 2, & 3 state: 1. "Create an integrated network of open space based on existing and proposed recreational areas, lands least suitable for other development, and the natural amenities of the Tukwila area." 2. "Provide vivid, diverse open space experiences which fit easily into the pattern of daily life." 3. "Provide meaningful recreational opportunity for all people of Tukwila, regardless of sex, age, color, or socioeconomic status." ' The proposed jogging trail, the terraced lawns, the viewing areas all provide for a vivid and meaningful experience. Indoor facilities contain opportunities for all citizens. Residence Element. The thrust of this element is "livability." The first section of the element seeks to create or maintain livable living areas of the city by establishing a . healthy land use climate, and by guaranteeing the future integrity of these areas. The proposed community center and its facilities clearly enhance the quality and desirability of the adjacent Allentown residential area. Criteria 5. TMC 18.72.020 (5) - The granting of the variance is necessary for the preservation and enjoyment of a substantial property right of the applicant possessed by the owners of other properties in the same zone or vicinity. Existing neighborhoods throughout Tukwila have non - residential uses. The zoning code acknowledges this when it permits churches, fire stations, water towers, schools and community centers to locate in these districts. The proposed community center's height variance of 8' -0 allows it to enjoy the same substantial property right that is available to these schools and other types of public facilities in the City's residential zones. The right specifically includes the right for a gymnasium that meets established standards. A grant of variance for the height of this community center is the same type of privilege already provided at Foster High School. The same logic applies to art galleries and public museums. Their design may well call for increased height above the 30 feet normally allowed in the R -1 zone. Considering that the rotunda is the City's public display area, it functions in,the same fashion as a free - standing gallery, and provides the 'same public benefits. Staff Report to the L94 -0087: Tukwila Community Center Board of Adjustment DECISION CRITERIA (continued) Page 8 Thus there is a sub3tantial property right available to all these non - residential uses. The community center is no different than any other public facility in this regard. A variance for increasing the height for the gymnasium and the rotunda acknowledges such a right. The public's interest remains protected, however, as the Center still has the same obligation as these others. The zoning code requires these type of uses to go through additional public scrutiny and to receive specific conditions of approval from the Planning Commission and the Board of Architectural Review. CONCLUSIONS 1. (No special privilege). A height variance allows construction of a full- service community center, which contains features (rotunda and gym) that are normal functions of such a facility. This center comprises the same uses found in other properties in the residential district. Granting the variances thus do not represent a grant of special privilege. The proposed center's use and activities will foster neighborhood preservation, and will constitute a compatible land use for the adjoining residential area. To not grant the variance would cause unnecessary hardship to the general community, which is the direct beneficiary of the facility in the first place. 2. (Special circumstances). A height variance is necessary because of special circumstances of the site and its flood plain. The building is constrained by compliance with Federal laws to protect the public health and safety. The structure can not be set at a lower grade without violating Federal standards or incurring immense costs. The requested height of 38 feet would provide it with the same use rights enjoyed by schools elsewhere in the City. To not grant the variance would cause unnecessary hardship to the general community, ar action counter to the purposes of benefitting the public interest. 3. (Public welfare is benefitted). A height variance does not adversely affect the public welfare, because the facility's design provides a residential appearance, and because its location on the site is set back several hundred feet from the public right of way. Additionally, the design contains open spaces totalling over 90% of the site, thus minimizing the impact of the structure on views from outside the property. The facility directly benefits the neighborhood as it provides services and recreational facilities, not readily available in the area. The public's interest is further protected with a set of additional public reviews conducted by the Planning Commission and the Board of Architectural Review. Staff Report to the Board of Adjustment CONCLUSIONS (Continued) L94 -0087: Tukwila Community Center Page 9 4. (Comprehensive plan is implemented). The center's design, which reflects the height variance, acknowledges the City's comprehensive plan by reflecting specific goals for the natural environment and open space. Trails, vistas of Mount Rainier, playing fields, and indoor court facilities are tangible and immediate benefits :to the neighborhood. There are wider benefits too, with the senior center, the gallery, banquet facilities, and fitness activities. Residential livability is enhanced. 5. (Preserves substantial property right). A height variance is needed to provide this site with the same substantial privileges and rights, of use that have been given to Foster High School, to churches, and to other facilities. All of these uses are identified as being conditional ones in the R -1 portion of the zoning code. Granting the requested variance for the community center thus allows it to proceed for further public review. Subsequent protections for public benefit include a Conditional Use Permit by the Planning Commission and design approval from the Board of Architectural Review. RECOMMENDATION Based on the above findings and, conclusions, the Department of Community Development recommends approval of the 8' -0" height variance for the community center. 0.1.42,01 'ma's 0,11,1* kg. ikrri rAr.mxc. min r.Anc rho% tic ern, flv...1 • tO • ST111 Acciza 'MON t il'. ad.'m 10MIMI amem4e. 444.4. ha* /414.441 44'rry4 erri fre4nen .&( m,, ekt4on SHADE ITO'S z'w4.1.! *LA, of.,70 roiri 1„:44 LVA rrairrarry 1.101 mr-stut oirroila44:4-rs -zo.rrk-.1 roor tom rr 4)4' WAY 111' Ft. 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COMMUNITY CENTER 1-o 40--0- AnntrtuMthMK Ltypsr,rx Arsittnrmitz ,thc ,ciirrEcTm s ural REcE. AND 11:11.11:1) soon ircor.A STrITT 51:1111.Y.11.1. 101111 211.01:111:1131 • '. 1101 11.45T mu surn41VA 1111121 10114'22 3122 t\ CsTVOCE • —.• af% :a; • • fel .3.14 • • �' A ...••� • `; ' • k S ri,` M: .r _rte �� . :,. •/y•�' • •�X17-.r�"'•r S ,.,:.,,A11 < ►. .AtE,t ser \\�.r • 1\77- a • • illi}7; i 'sill. of to, PRE-AI'I'I.ICA'I'lo\ SI!li\II'1'1',\I. `1'IJI.11'IIA. (:0111111\I'1'I' CENTER moon rLAN I'-o- •rs.unn:nrr. 1.\•u<cvr. Ar.rnrm:nr.r. An(: AI:C111'1'1ECl'S 1101 R\%r r1RE %R\Till 1r.\ 0/11S3 IIo11(;11 t I) BAI1:1) 10011 roar.\ snort %1:1Tnr. 11.\ %6111 ..6..65....1 tint *-t !mmoomQ9. gine. • ,--- ..sL4 Aai . . tete.:;:. ..: `;� .waPFMATP. uw.M.A..M..r teens M)IITII 1 VATIOM AYd11\\ tete :i`I PAPCII • 1 11 Y r?���'sYrlL ART SAMM liFTELIF WO PIM, PM S �cT, y`3 ti C7 -7.... aL'r • y, .:.s+. M�d.k%r�-yA1�4 ra• 4�y "�.,. "tete tete".w•w... .]tete ^�•-�..�e�e]';r•>L=i�..��,:._•:�11,:I'y�1�' '' IRT. ....w... ( FNMA.. 0.0w1r w." •... SOIMI FI.E''A•nm wow MOOT. .A.A..e.,•.o 3 i -N 38 FEET r v: T. H 11111M1€i,1 1 1 1 111 •NAWARI •• ;;T -� `cs1s` IS;;.`;;•�c.��i�',1us+•'ia�T•-A'•' i•:Y�if . tete / ,i � rl. s ' ••�' `-� � c� 1`. BUILDING HEIGHT TUKWILA COMMUNITY CENTER ELEVATIONS .'11IONS OPTION "A.\", PER COMI1'1711I'I'ION vis-= r-o- Ar.r.H , nT.R 1.,Al.sG,rt Ar.r.I)ri :mu AR(: AIU:11rri:A:is 11O1ICD IIECK AND BA IIID 1101 CM 1.1.6 sr-,rns "•., 111I21 1061111111 mw)1J..0r. s1TJr r wr..rni,VA '1111/ :116 6 61 1011 7 c0..1 2-11311;>N/T.y . NT_.: -. - t . /CM AM r1 -.ea* O 1 £124th Street _ C 1 u.0.! ` ba r. }.War a :/Ar 22 • N £125th Street X11 1121 3 —It 61. 0311 ► 13 ALLAN vow 1 C ST 1.00 worts' • T(0 T•[•C•- I.INATNY •Ysren? C/ As -111 0,r11-.•- . ITr1 '� 100 YEAR FLOOD £LEV• - 11.0 (r. r.M.A.) ¢t LINE Of ORDINARY HITT, wATER/ VtGETAT10N L1141 LAND CPTINOS Mt' 0ND PLAT •PoNOw1, let wort TM13 SMttT. TOP OF SANK ------------- 100 YEAR FLOOD ELEV -12.0 (fE.NA) /BOUNDARY LINO ALLCNTOWN PLAT VOL. lt. P. 100. 141MG COUNTY. WO. OWNCRSNII Or LANDIVCOWARD OF PLAT N6C U 0IT0:0300 TO r µD SCLOSC Owoe.INIAITTo L4,10If or Ow01NAAY SOON WAT[! ACYONO PLAT Iou00ANY. PRE -APPLICATION tillIMITTAI, TIJI IVILA. COlIl1IJNITY CENTER swuco .ap 1 fieem 5014.0 O.At1 T.r 0!000 ,1 I. LAM'00`W SGvr Mo.. 1 - .r t•r. AM KAMM ICC. •• 005 P.3 t loft MEM ENGINEERING rna £(004 DtD10 LAD P -. MAST TIeRI 1.W •..0.07 & T.P.I./LIe S.T..7- A0..l.0. P.. P.lee • Cry. nee CV .1 VOAPLIA. VA no !•no. Dow • Are 12090777 MT tar 4