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HomeMy WebLinkAboutPermit L93-0004 - CITY OF TUKWILA - SOUTHCENTER BOULEVARD - I-405 INTERCHANGE SHORELINE SUBSTANTIAL DEVELOPMENTL93-0004 SOUTHCENTER BLVD - I-405 INTERCHANGE SHORELINE SUBSTANTIAL DEVELOPMENT M E M O R A N D U M TO: Rick Beeler FROM: Ann Siegenthaler RE: TREE REPLACEMENT IN SHORELINE SUBSTANTIAL DEVELOPMENT SHORELINE MANAGEMENT Riverside Inn /S. 141st and I- 405 /Southcenter Blvd. projects DATE: September 15, 1993 ISSUE: When shoreline projects, which are exempt from the Tree Ordinance but not exempt from shorelines permit, require removal of trees, what is an appropriate requirement for tree replacement? BACKGROUND: Two current City projects require removal of trees within the shoreline, but are exempt from the Tree Ordinance, as they occur within City- approved right -of -way. Similar projects are anticipated in the near future. Parks and Public Works are asking what DCD will require for tree replacement, if any. Staff and other departments need some clarification of, and predictability in our tree replacement requirements. Shoreline regulations state that "where riverbank has been reconstructed, it shall be landscaped with....large hardy shade or fruit trees, at a maximum of 30 feet on center, such as maple, alder, poplar, cottonwood...or other species approved by the Planning Director" (TMC 18.44.130). Where the riverbank is not disturbed, neither our shoreline regulations nor Zoning Code require tree planting. In the past, we have relied on Shoreline Master Program policies to respond to impacts to trees. Shoreline policies "encourage preservation of...the natural character" and the "resources and ecology of the river...;" and maintenance of a buffer of permanent vegetation..." RECOMMENDATIONS: While shoreline tree regulations are minimal, our shoreline policies require us to mitigate impacts of tree removal. Tree replacement requirements should be based on the impacts to the Memo Rick Shoreline Trees, 9/15/93 shoreline: 1) how close the trees are to the river; and 2) how big the trees are. Replacement requirements should also reflect the interrelationship of these two factors. For example, a very large tree located away from the river still shades the water, and may have more value than a small tree located next ,to the river. I suggest we follow a simple matrix for tree replacement, using our current shoreline "impact zones" and tree size, as follows: Size Proximity of removed trees to river: of Tree Removed: 40' River Zone 60' Low Impact Zone 100' High Impact Zone < 6" Replace 2:1 Replace 1:1 (Max. 30' o.c.) 6 " -12" Replace 3:1 Replace 2:1 (Max. 30' o.c.) >12 " -18" Replace 4:1 Replace 3:1 (Max. 30' o.c.) >18 " -24" Replace 5:1 Replace 4:1 (Max. 30' o.c.) >24" Replace 6:1 Replace 5:1 (Max. 30' o.c.) Plant trees at river Plant trees at river Replace 2:1 Replace 3:1 Replace 4:1 I've reviewed this with Jack. If you concur, I can convey our direction to Parks and Public Works. They would like to know as soon as possible. Please respond by 9/17/93. Thanks. cc: File City of Tukwila Department of Community Development MEMORANDUM TO: Brian Shelton, Public Work FROM: Ann Siegenthaler RE: SOUTHCENTER BL /I -405 SHORELINE PERMIT #L93 -0004 DATE: September 1, 1993 John W. Rants, Mayor 1// - it/ "Ye Rick Beeler, Director hits I LX tment of Community Development We've previously discussed several changes in the above project which were not reflected in the original, approved permit drawings. The shoreline permit was approved on 4/14/93. It seems that, perhaps because of the tight timeline, DOT was still working out some of the details of the project after permit issuance. Also, it appears that some of the original drawings did not accurately reflect the proposed work. Changes in work approved in the 4/14/93 permit drawings will require a revision to the shoreline permit. I think it will be helpful to all of us to revise the permit now. It will reduce surprises later. The changes I'm aware of so far are listed below. 5 49-e Pius 1. xs, T.0 ) 02-41, MAX / cer'r" ,e/WAGG 70 a 6-7>" %ud . cape Project has required removal of existing trees on south side of river, which were identified as "existing trees and shrubs - -do not disturb." As we discussed, the permit revision should include mitigation consistent with the Tree Ordinance (replace canopy cover with 2 -1/2" caliper trees). Given our experience on the south side of the river, drawings in 4/14/93 permit may not accurately reflect limits of construction on the north side of river. Therefore, a survey should be submitted, showing location of all existing trees and canopy extent, and the location of construction limit line relative to tree driplines. The permit revision should include proposed tree replacement where construction is within 10' of tree dripline. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431 -3670 • Fax (206) 431-3665 Memo Brian, 405 Shore Permit, 9/1/93 Page 2 /3. Location and limits of construction of temporary ramp were not shown on landscape plans or grading plan. This should be shown, along with proposal for dismantling and disposal of fill. Any other temporary structures which require clearing or fill should also be shown. Excavation for bridge pier(s) was not shown on drawings relative to existing vegetation to be saved. This should be shown for all bridges, including effects on landscaping and vegetation to be saved. As a reminder, the permit requires aafollow-up archaeological investigation prior to bridge abutment excavation. Areas to be cleared or graded for coffer dams at each bridge should be shown as noted above for bridge piers. Construction barrier fencing was not located 10' from dripline of trees to be saved, as required in permit conditions. Landscape plan should be revised to reflect approved location of barrier in all remaining areas of work; barrier location should be surveyed and staked as approved prior to land - altering. Rip -rap at trail and north off -ramp bridge were not shown on landscape plans. Plans show area of rip -rap to to be landscaping and "do not disturb" existing vegetation. All proposed rip -rap should be shown on plans, and plans should accurately reflect the effects of rip -rap (such as changes in proposed landscaping . and existing vegetation). ;/8. Rip -rap is to be revegetated, per Dept. of Fisheries permit. While we verbally agreed on this in original permit, we did not get the documentation. This should be included as a revision. OR These are the changes I'm aware of which need to be included in your permit revision request. In addition, we've reviewed the need for a revision in the north off -ramp bridge construction, which will require a retaining wall along the trail (approx. 15' high by 30' long). Your memo of 8/13/93 will suffice as a permit revision for this item. If you'd like to review any of these items, I'd be happy to meet with you and /or Ross to discuss. cc: Rick x+.,.,.rw•.,nv. snCrv,.<., ,;.,^:¢Hit'cnV,V4.?_ni4;.4,TY•: r:9 :4411KT .',..J11., ;.,n.. m,............. August 13, 1993 • TO: Ann Siegenthaler, DCD FROM: Brian Shelton, PW SUBJECT: Southcenter Blvd, 68th - Grady Way Retaining Wall /Landscape Revision Project #85 -RWO2 The retaining wall located at the northwest corner of the new ramp /Green River bridge requires relocation due to construction conflict with maintaining safe vehicle and pedestrian traffic on Southcenter Boulevard for the remainder of the construction contract. As we discussed August 11, this revision involves rotating the wall so that it parallels the main river trail instead of the ramp. The wall will extend approximately 25 feet westerly from bridge abutment #4 and lie approximately 16 feet from centerline of the main river trail leaving roughly 5 feet for landscaping in front of the wall. The area between the wall and upper trail will be recontoured to fit this revision. The original landscaping quantities for trees and shrubs will be retained in the revised plan. Additionally, six (6) vine maples, 2' -3' height, at 5 feet on center spacing will be added to the area in front of the wall as you required. The above details are indicated on the attached plan. Ross Earnst and Don Williams concur with the above changes and requirements. This memo is confirmation that Public Works and Parks Departments accept the requirement of adding 6 vine maples to the landscape plan. Attachment cc: Don Williams file: 85- RW02 -5 f w���•+`. ..1•4 AUG 1 6 t93 1„J L . 'J + R N N U V � I Ot 0 • • 2c) N I I -4 t co q ti I - -pi isrl DO —0z 0 to tri .?4,g \ t .Q / Ufa, '4C n. rn �i .a _4'p co co D tn� rn b trlr rn •� 04 • O M'zfl co rn to" c SLOPE VAR co rn`" US ; c A. r so R1 �• � �C "1 f Ad JO X.'8 01 )1.2V8) #0 -2c • Ali T rn F 3 ' . 1S,93 y � -Y• co - TO FILE: M E M O R A N D U M T O F I L E I- 405 /Southcenter Blvy ,Shoreline Permit FROM: Ann Siegenthaler Department of C •'' u it`lf Development RE: Permit Revisions -- Replacement Trees DATE: August 10, 1993 Brian inspected with contractor the impacts of temporary and permanent ramp fills on 3 remaining trees. Brian met with Ann today to give status: 1. West tree: not an issue. Construction fencing moved out as agreed; jersey barriers can keep temporary fill away from tree. 2. Middle tree: Fill has great impact. Toe of temporary ramp (2:1) is well within dripline (from 8/5/93 discussion). Toe of permanent ramp fill (2:1, vs. 3:1 as originally thought) will be 2 -3 feet away from tree trunk. To keep fill out of dripline will require retaining wall 15 -20' high. In addition, the excavation for the bridge pier (south pier of off -ramp) will be well into the dripline. Excavation is 50' deep, and approx. 20' wide (by x' long ?). This was not shown on landscape drawings. 3. East tree (near Interurban): Fill has great impact. Toe of permanent ramp fill (2:1, vs. 3:1 as originally thought) will be at trunk or past it. To keep fill out of dripline will require retaining wall 15 -20' high. To protect the two trees, a retaining wall 15 -20' high, approx. 150' long is needed. This length is needed because trees are close together and because of slope. Ann believes trees will not survive. Cost will be prohibitive. Brian and Ann agreed to mitigate for a total of 3 lost trees (out of 4 which likely could have been saved in original permit review) by planting replacement trees per Tree Ordinance. Brian will have DOT or LA prepare drawings and estimates as follows: r •,.::. r._.., a:.: rs::. v. 9.; t:: r:».^ t..:: r: r• u: v.•-.... er.,, ..... ,.^,.. .,......,.....,.,........._.... _...__.. ... .. _...__ .._,. ........,..........veR1a:n . na..,,,M,ViNJn., :1 „.7"M.: l ..... x. n_ ...,.,.e4'.r:1%vss.'ir.V..'rmve .v;,.r.;.arar�;r Memo to File, I- 405 /SC Blvd. Shore Permit 8/10/93 Page 2 1. Canopy cover of 3 lost trees. 2. Calcs of numbers of 2 -1/2" replacement trees needed (consistent with draft calcs prepared by Ann, given to Brian - -see attached. 3. Revised landscape plan showing: • Replacement trees planted as close to top of bank as possible. Cutting back blackberries to top of bank to get trees in is OK. • How many remaining trees will be planted off -site along shoreline, if necessary. • Species and spacing (some conifers, but not too much shade on Don's trail picnic area. • Any adjustments in numbers or spacing of shrub -size trees elsewhere in the project, to the degree that such adjustments are necessary to maintain cost feasibility of big tree replacement. 4. Memo from Public Works amending the shoreline permit to reflect the above changes, and agreeing to off -site mitigation along shoreline if necessary. Brian will review these mitigation requirements with Ross Earnst and let Ann know. cc: Ri pc.r G�CS�G�tst FILE: FROM: RE: DATE: M E M O R A N D U M T O F I L E I- 405 /Southcenter Blv• Yioreline Permit Ann Siegenthaler Department of Co nity Development Permit Revisions - -Tree Wells August 5, 1993 Drive by site inspection by Ann: Fill for temporary ramp being installed before decisions have been made on tree wells (per 7/30/93 site discussion). My understanding was that Brian Shelton & I would decide whether tree wells (2) were feasible before fill installed. Talked to Brian. His recollection of site discussion with contractor is different than my recollection. Brian thought tree well only an issue with permanent ramp. I had stated my concern on site that extent and duration of "temporary" ramp likely to cause permanent damage to middle tree. I emphasized more than once the value of middle tree and importance of trying to save it. [One factor contributing to this problem is that temporary ramp was not shown on original landscape plan.] We discussed idea of temporary retaining wall until permanent solution agreed on. We all agreed that many problems with a temporary wall. Brian thought we abandoned idea; I thought we were going to research further, after better idea of how fill might impact tree. My memo of 7/30/93 to Brian reflects this. Brian and I discussed options for temporary tree well for middle tree. Jersey barriers not high enough, can't take surcharge. Sheetpile would probably cause more damage to roots than fill. "Bookend" type wall of timber or sheet metal might work; cost could be very high. Worst -case scenario is "temp" fill remains over much of root area for 1 -2 years; then removed. Tree will be damaged, but may survive (how long ? ?). Brian will find out how high fill will be and explore options further with contractor. TO: FROM: Ann Siegenthaler, Associate Planner RE: SOUTHCENTER BLVD /I -405: Tree p ec Lion Shoreline Permit #L93 -0004 City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director M E M O R A N D U M Brian Shelton, Project Engineer, Public Works DATE: July 30, 1993 Below is a re -cap of the status of tree protection for the above shoreline permit, and of our discussion with the contractor. ISSUES: Based on shoreline permit drawings and conditions for the project, it was expected that a) more trees would be retained, and b) those retained would have more protection from construction activities. However, we've lost more trees than we expected, and could lose all of the trees on the south side of the river. For these reasons, the project doesn't comply with our shoreline permit. You, the contractor and I are working together to remedy this situation. We have agreed we need to save as many trees as we can, within project limitations. Our two objectives are: a) keep construction activity /equipment as far away from trees as possible; and b) keep fill out of tree dripline. South of the river, three trees remain. Based on the permit, our goals for the shoreline, and our site inspection, these trees merit efforts to save. Below are actions we have agreed to take to protect trees: 1. West tree: Contractor will move construction fencing out 10' beyond dripline on west side. Can't move fencing out on other sides without interfering with temporary ramp. Jersey barriers at dripline on ramp side will keep fill out of dripline. All fill to be removed in approximately 1 year. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington' 98188 • (206) 431 -3670 • Fax (206) 431-3665 Southcenter Blvd. /I -405 Memo to Brian, 7/29/93 Page 2 2.. Middle tree: Contractor can't move construction fencing out any further without interfering with temporary ramp fill. Contractor will keep fill for permanent ramp out of dripline. Contractor could install a retaining wall to keep fill away from tree. Contractor will call City after slope toe is staked, so that we can see how tall the wall would be and evaluate its cost /effectiveness. 3. East tree: Contractor will move construction fencing out to beyond the dripline on southeast side. Contractor will investigate the possibility of steepening slope of permanent ramp. Contractor could install a retaining wall to keep fill away from tree. Contractor will call City after slope toe is staked, so that we can see how tall the wall would be and evaluate its cost /effectiveness. Installing retaining walls or rockeries would add to total project cost. When we have more information on how high the walls need to be, their cost, and how effective they will be in protecting the trees, we will decide if the walls are cost - effective. In the meantime, the contractor will do what he can to protect all three trees. cc: Jack File ... � .............. .....___........w.�..rw.oM..... awe.,..... nay. nn. a.,. �,. �+. un.. i...,,....,. �........«.....- ..__.......__...........- -...`� - -....... ....R�rrirn�rrv.1'P::<`f ^.�...i ttn ", TO: FROM: RE: DATE:. M E M O R A N D U M Rick Beeler Ann Siegenthaler SOUTHCENTER BL ' /I -4i": Tree protection Shoreline Permit #L93 -0004 July 30, 1993 .` YM, ?`- f" Nw, �,^' gW. fS?' iC%: t` u- 1t�9. i�S: �.r.. i. 'y`Sdt'Y!';PF",17t?':os *•v9 :�:, 1er..«s.�..,.... -._._ (:;;;-YOUR INFORMATION On the Southcenter Blvd. /I -405 project, we've lost more trees than we expected. We could very easily lose all trees on the south side of the river. For these reasons, the project doesn't comply with our shoreline permit. Brian Shelton and I are working with the contractor to remedy this situation. Three trees are left. They are, the kind we really need along the river -- native, mature, appear to be viable - -and merit efforts to save. But all are adjacent to construction areas. Saving these trees may require some additional $$$$ for wells. We will need to decide whether the trees are worth and if we are willing to suspend the shoreline permit until commitment to save the trees. This issue affects the trees north side of the river also. I will let you know when Brian and I have costs worked out. cc: File (2) tree the $$$$, we have a along the M E M O R A N D U M T O F I L E TO: SOUTHCENTER BLVD /I -405: Tree protection Shoreline Permit #L93 -0004 FROM: Ann Siegenthaler, RE: Tree protection DATE: July 30, 1993 ISSUES: Associate Planner At the south side of the river, construction has left three large trees. Clearing and equipment traffic have occurred within the driplines of all of these trees. All other trees on south side have been removed. Based on shoreline permit drawings and conditions, it was expected that a) more trees would be retained, and b) those retained would have more protection from construction activities. BACKGROUND: Apparently, original drawings did not accurately describe the impacts of construction on trees. Drawings showed large areas of vegetation to be saved. However, construction limit lines were not located relative to tree inventory, and the temporary off -ramp was not located on the drawing which showed vegetation "do not disturb" areas. In reality, most of the existing trees were in the way of construction. The shoreline permit required as a condition that to adequately protect "do not disturb" areas shown on drawings, the construction barrier must be located 10 feet out from the dripline of saved trees. However, when the construction fencing location was staked on site, the contractor did not take into account the additional 10 feet. STATUS: On July 19, 1993, I talked with Brian Shelton, the Project Coordinator, about protection of the remaining trees at the above project. I asked Brian to contact WSDOT to relocate the construction fencing by July 21, 1993. Brian has discussed the tree issue with the Southcenter Blvd. /I -405 Memo to File, 7/29/93 Page 3 Below are actions we have agreed to take to protect trees: 1. West tree: Contractor will move construction fencing out 10' beyond dripline on west side. Can't move fencing out on other sides without interfering with temporary ramp. Jersey barriers at dripline on ramp side will keep fill out of dripline. All fill to be removed in approximately 1 year. 2. Middle tree: Contractor can't move construction fencing out any further without interfering with temporary ramp fill. Contractor will keep fill for permanent ramp out of dripline. Contractor could install a retaining wall to keep fill away from tree. Contractor will call City after slope toe is staked, so that we can see how tall the wall would be and evaluate its cost /effectiveness. 3. East tree: Contractor will move construction fencing out to beyond the dripline on southeast side. Contractor will investigate the possibility of steepening slope of permanent ramp. Contractor could install a retaining wall to keep fill away from tree. Contractor will call City after slope toe is staked, so that we can see how tall the wall would be and evaluate its cost /effectiveness. Installing retaining walls or rockeries would add to total project cost. Brian and I will evaluate costs and the likelihood of success in tree - saving. cc: File Southcenter Blvd. /I -405 Memo to File, 7/29/93 Page 2 contractor. Apparently, the contractor felt that he met permit conditions as much as possible, given the requirements of the construction process. Today, Brian and I inspected site and talked to the contractor about how we can accommodate tree protection in his construction process. This is the status of the trees: 1. First (west) tree is mature maple (Norway maple ?); it appears to be healthy. It is outside the original construction limit line and was scheduled to be removed. However, contractor has tried to save by putting construction fencing around it. Toe of fill for temporary ramp (2:1) will be within the dripline on 1 side. Can't steepen fill slope any more. This tree appears to be the least affected by construction. 2. Middle tree is very large, stately bigleaf maple. Appears to be healthy. Toe of fill for temporary ramp (2:1) will be within the dripline on 1 side. Can't steepen fill slope. 3. Third tree (east) nearer Interurban is mature bigleaf maple. Has had some previous damage, but looks viable. It is outside the original construction limit line and was scheduled for removal. However, contractor has tried to save by putting construction fencing around it. Toe of fill for temporary ramp (2:1) and permanent ramp (3:1) will be within the dripline on 2 sides. This tree appears to be the most affected by construction, and may be lost. After reviewing the drawings again, and construction requirements, I think we could have expected that 4 existing trees could have been saved. We now have 3 trees; of these, only 2 are likely to survive. It is not possible, in all cases, to meet the permit condition for locating the construction fencing. However, to remedy the loss of trees on the project, Brian, the contractor and I agreed we need to save as many trees as we can, within project limitations. Our two objectives are: a) keep construction activity /equipment as far away from trees as possible; and b) keep fill out of tree dripline. City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director SOUTHCENTER BLVD /I -405 SHORELINE PERMIT #L93 -0004 CONDITIONS 4/14/93 1. The requirements this project must meet for tree replacement are as follows: a) A minimum of thirty -six (36) 2 -1/2" caliper trees (or 8 -10' conifers) shall be planted within 100 feet of the river. At least twenty (20) of these shall be on the east side of the river. b) The large caliper trees required in (a) above shall be spaced no more than 50' on center. c) At least fifteen (15) of the large trees required in (a) above shall be native conifers. Year -round cover provided by these conifers will help mitigate the loss of wildlife habitat caused by the project. Other trees shall be large stature, native species where possible. 2. Prior to initiation of any clearing or grading of any area within 200' of the river, a construction barrier which protects retained vegetation (areas identified for protection on Sheet L -1) shall be installed. Construction barrier should be a minimum 4' high, with polythylene netting (or similar) attached to 4 x 4 posts, and located 10' from the dripline of retained vegetation (per tree ordinance). A silt fence is not adequate protection. 3. Small caliper trees in "Plantings West of the Green River" (per Sheet L -5) shall be spaced no more than 20' on center; shrubs no more than 3' on center. No spacing is given for trees and shrubs in this area; spacing is a critical factor in establishing vegetative cover. 4. Any existing trees to be removed by ecology ditch construction (per Sheet D -6) shall be replaced according to the standards in Item 1 above. The material to be used for the 4' high walls of each ditch shall be of a natural - appearing material which visually blends in with the surrounding vegetation. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 �«hFF %Tl4 ?:Ffh�.C• mxCa�t I -405 Shore Permit Conditions 4/14/93, Page 2 5. Proposed pedestrian trail shall meet the following standards: a) Trail shall be lighted, with pedestrian -scale lighting fixtures located in a manner which provides safe and attractive lighting for all trail sections, including areas under bridges b) Trail shall be 12' wide with 2' shoulders, with a minimum clearance of 7' under both bridges. 6. Lighting for the project shall be designed in a manner which limits impacts of undue glare to the river area, the river trail and surrounding properties. 7. Prior to bridge abutment excavation, there shall be a follow - up archaeological investigation for possible cultural resource deposits located deeper than 2 meters from the surface. Excavation shall not resume until the Office of Public Archaeology (or equal) verifies that any significant archaeological remains can be protected or are not likely to be discovered. 8. Any revisions to the permit drawings approved as part of this permit shall be submitted to DCD for approval. Prep by: Ann Siegenthaler cc: Jack Pace, Senior Planner File Q °10( \o M E M O R A N D U M TO: Brian Shelton FROM: Ann Siegenthaler RE: Southcenter Blvd. /I -405 Shoreline Permit DATE: July 28, 1993 Last week (on July 19th) we talked about protection of the remaining trees at the Southcenter Blvd. /I -405 project construction site. As we discussed then, the shoreline permit required as a condition of approval that trees identified for retention must be protected by a construction barrier located 10' out from the dripline (see attached copy). On the south side of the river, three large trees have been left standing. I had noticed that W.S.D.O.T. had located the construction barrier within their dripline. As I requested, you were to contact W.S.D.O.T. and ask them to relocate the construction barrier, around at least two of these trees, to comply with the permit condition. I asked that this be completed by July 21st. It is now a wee later, -and -W . S . D ._O...T..._ has not c_ omplied with this eft condition. I'm concerned not only about retani.rig these- ---___ remaining trees, -but how diligent W.S.D.O.T. will be in respecting the areas they marked "do not disturb" in the rest of the project The - construction barrier needs. to_be_remediedimmediately- .ck has (authorized ui to issue a "Stop Work" order, to ensure compliance. lease let me know when this has been completed. Thanks. cc: File Jack Pace • 1'�Nli.: +'fr 3: �.: ..... ^._i1i::.i>�Cv±.:':% '�.;�:��:.:,`. t:f'.�i "•��': "',iv:�:;. ,,_. c • STATE OF WASHINGTON DEPARTMENT OF ECOLOGY P.O. BOX 47600 • Olympia, Washington 98504 -7600 • (206) 459 -6000 June 14, 1993 Mr. Brian Shelton City of Tukwila Public Works 6300 Southcenter Boulevard Tukwila, WA 98168 Dear Mr. Shelton: Re: Cit of Tukwila Permit #L93 -0004 y o Tukwila Pus c "or s - Applicant Shoreline Substantial Development Permit #l993 -14462 The subject Shoreline Management Substantial Development permit has bee filed with this office by the•City of Tukwila on June 8, 1993. If this permit is not appealed to the Shorelines Hearings Board on or before July 8, 1993, authorized construction may begin. Other federal, state, and local laws regulating such construction shall be complied with. Unless an appeal is filed, this letter constitutes final notification of action on this permit. Sincerely, K -Y Su Permit Coordinator Shorelands and Coastal Zone Management Program. KYS:pz sdp.ma cc: i:R ck Beeler, City of Tukw la CIAz— Crewald, DOT RECEIVED JUN 1 7199 COMMUNITY 1' �p 1%6 ME T City of Tukwila John W. Rants, Mayor De artment o Com ��� p p f nl DeVelo ment Rick Beeler, Director May 21, 1993 Mr. Don Bales Shorelands Management Section DEPARTMENT OF ECOLOGY Mail Stop PV -11 Olympia, WA 98504 -8711 RE: Shoreline Permit #L93 -0004: Southcenter Blvd. /I -405 Interchange, Tukwila, WA Dear Mr. Bales: As you requested, enclosed are additional permit application materials related to the above project currently under DOE review: • Bridge alignment plans; • Ecology ditch detail & location; • Bridge layouts & cross - sections (with piers) • Fish habitat plans; • Landscape plan; • Environmental Assessment (1983) for the project; • Affidavit of Publication in Seattle Times. Please let me know if you have any questions on this material, or if you need additional information. Thank you for your assistance in the review of our project. Sincerely, Siege haler Associate Planner cc: File 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 41313670 • Fax (206) 431-3665 City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director SOUTHCENTER BLVD /I -405 SHORELINE PERMIT #L93 -0004 CONDITIONS 4/14/93 1. The requirements this project must meet for tree replacement are as follows: a) A minimum of thirty -six (36) 2 -1/2" caliper trees (or 8 -10' conifers) shall be planted within 100 feet of the river. At least twenty (20) of these shall be on the east side of the river. b) The large caliper trees required in (a) above shall be spaced no more than 50' on center. c) At least fifteen (15) of the large trees required in (a) above shall be native conifers. Year -round cover provided by these conifers will help mitigate the loss of wildlife habitat caused by the project. Other trees shall be large stature, native species where possible. 2. Prior to initiation of any clearing or grading of any area within 200' of the river, a construction barrier which protects retained vegetation (areas identified for protection on Sheet L -1) shall be installed. Construction barrier should be a minimum 4' high, with polythylene netting (or similar) attached to 4 x 4 posts, and located 10' from the dripline of retained vegetation (per tree ordinance). A silt fence is not adequate protection. 3. Small caliper trees in "Plantings West of the Green River" (per Sheet L -5) shall be spaced no more than 20' on center; shrubs no more than 3' on center. No spacing is given for trees and shrubs in this area; spacing is a critical factor in establishing vegetative cover. 4. Any existing trees to be removed by ecology ditch construction (per Sheet D -6) shall be replaced according to the standards in Item 1 above. The material to be used for the 4' high walls of each ditch shall be of a natural - appearing material which visually blends in with the surrounding vegetation. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 I -405 Shore Permit Conditions 4/14/93, Page 2 • .Me,�nnmrewrtr. ",,, i'VeA:1,,,J1 wm.x.v aiertel, -.n,,■nn..em,.«+n.... Proposed pedestrian trail shall meet the following standards: a) Trail shall be lighted, with pedestrian -scale lighting fixtures located in a manner which provides safe and attractive lighting for all trail sections, including areas under bridges b) Trail shall be 12' wide with 2' shoulders, with a minimum clearance of 7' under both bridges. 6. Lighting for the project shall be designed in a manner which limits impacts of undue glare to the river area, the river trail and surrounding properties. 7. Prior to bridge abutment excavation, there shall be a follow - up archaeological investigation for possible cultural resource deposits located deeper than 2 meters from the surface. Excavation shall not resume until the Office of Public Archaeology (or equal) verifies that any significant archaeological remains can be protected or are not likely to be discovered. 8. Any-revisions to the permit drawings approved as part of this permit shall be submitted to DCD for approval. Prep by: Ann Siegenthaler cc: Jack Pace, Senior Planner File Shork_.. ine Management Act of 1971 PERMIT FOR SHORELINE MANAGEMENT SUBSTANTIAL DEVELOPMENT File Number: L93-0004 Status: APPROVED Applied: 02/09/1993 Approved: 04/14/1993 Expiration: 04/14/1998 Pursuant to RCW 90.58, a permit is hereby granted to: CITY OF TUKWILA to undertake the following development: SOUTHCENTER BLVD /I -405 INTERCHANGE: BRIDGE FOR SOUTHCENTER BLVD, BRIDGE FOR I -405 ON /OFF RAMP, LANDSCAPING FOR INTERCHANGE AREA, SHORELINE REVEGETATION, NEW TRAIL IN OLD SOUTHCENTER BLVD. RIGHT -OF -WAY, IMPROVEMENTS TO ROADWAY & SIGNALS. AT INTERURBAN AVE /MONSTER ROAD AND INTERLRBAN AVE/ ON /OFF RAMP. upon the following property: Address: Parcel No: Sec /Twn /Rnge THE PROPOSED PROJECT WILL BE WITHIN THE AREA OF THE GREEN RIVER AND ITS ASSOCIATED WETLANDS, WHICH I'S A 'SHORELINE OF STATEWIDE SIGNIFICANCE AND IS DESIGNATED AS AN URBAN ENVIRONMENT. The following master program provisions are applicable to this development: Development pursuant to this permit shall be undertaken pursuant to the attached terms and conditions: This permit,is granted pursuant to the Shoreline Management Act of 1971 an nothing in this permit shall excuse the applicant from compliance with any other Federal, State or local statutes, ordinances or regulations applicable to this project, but not inconsistent with the Shoreline Management Act(Chapter 90.58 RCW). ► This permit may-be rescinded pursuant to RCW 90.58.140(8) in the event the permittee fails to comply with the terms or conditions hereof. CONSTRUCTION PURSUANT TO THIS PERMIT WILL NOT BEGIN OR IS NOT AUTHORIZED LINTIL THIRTY (30) DAYS FROM THE DATE OF FILING WITH THE DEPARTMENT OF ECOLOGY AS DEFINED IN RCW 90.58.,140(6) AND WAC 173 -14 -090, OR UNTIL ALL REVIEW PROCEEDING'S INITIATED WITHIN THI Y _DAY': FROM THE DATE OF SUCH FILING HAVE T MINATED;; EXCEPT AS P r d� IN' CW 90.58.140(5)(a)(b)(c). Date: i �ector�, Planning Department Construction or substantial progress toward construction must begin within two years from date of issuance, per WAC 173 -14 -060. City of Tukwila John W. Rants, Mayor Department of Community Development Rick Beeler, Director MEMORANDUM TO: Brian Shelton Public Works FROM: Ann Siegenthale Department of ,.26omm ty Development RE: SOUTHCENTER BLVD/I-405 SHORELINE PERMIT #L93 -0004 DATE: April 8, 1993 I have completed my preliminary review of the Shoreline Permit for the above project. In the current project submittal, there are several drawings with no number, no date, and no source. .Some important information is also missing from the application. Consequently, I have several concerns about the project. To expedite your permit approval, I have addressed these concerns as permit conditions, rather than revisions to the drawings. These conditions are listed on the attached sheet. Most of the permit conditions relate to shoreline vegetation and wildlife habitat issues. As we discussed today, this project must comply with Shoreline policies and regulations, and the new Interim Tree Ordinance. Shoreline regulations require that wildlife habitat be protected, and that trees be replaced with "large, hardy shade or fruit trees, at a maximum of 30' on center." The tree ordinance requires that trees be replaced in sufficient quantities to maintain previous canopy cover. This means that, for any one large tree removed by the project, many new trees would be required. Replacement trees must be a minimum 2 -1/2" caliper. Approximately. 36 large trees are likely to be removed or irreparably damaged by the project. Thirteen replacement trees which meet the minimum size requirement are proposed. This replanting does not comply with shoreline or regulations or the tree ordinance. However, given the unusual nature of this project, DCD has applied a broader interpretation of specific code regulations. This is reflected in the permit conditions for tree replacement. If you feel the required tree replacement is not feasible, you may submit a written request to Rick for an exception. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431 -3665 ....nl �•;na _n.Yw�t�'� ^' 1:tNr'!�..: rfv.nt:wzvaiw •awn. Memo B. Shelton Shore permit, 4/8/93 Page 2 Also, please be aware that any staging areas within the 200' Shoreline Zone may require a Shoreline Substantial Development Permit, prior to construction start. This permit process could add 120 days or more to the project timeline. I suggest that prior to initiation of any construction, the selected contractor submit a plan to DCD showing proposed staging and stockpile area(s) for the project. As a courtesy to the public, it would be helpful to have a packet of information at DCD and Public Works' counters which briefly explains the project, its timeline and detour.routes. I have forwarded your permit file to Jack for approval. If you have any objections to the attached conditions, please discuss them with us as soon as possible. cc: Jack file MAR- 22 ='.93 MON 12:37 TD: PHASE II Foat4t" brand Fax Transmittal Memo 7672 )r rile r- Company Ci 4,...rithcw, Location TO Fax # Telephone M Comments 1 i s-E- .SUPePC v51.6T •rar 'Ire 5619 Mix -Trees ,�►}j Smart Pence 446. DIST I TEL NO:206 -552 -4495 #899 P01 No. of Pages I Tod )atea 9 Time Y �7J %.. F" 5a tLy Ar�der &w T. Company W )t' b Location �J Dept. Charge Fox M Telephone it Original Disposition; 0 Destroy p Return ❑ Call for pidwp 15 ■% 4eoe. G..c,,✓wr✓ivt a % As 64# we/v.& 4A4d O lob /x d%. [ 0/0/Gv5 vra 4,a4tiss %«+ivca90s 3 t itheavid Ac 4-lip % 60-1 A 1 €A Y4. 27L. CertEd, NJ 1 MUCKLESHOOT INDIAN TRIBE FISHERIES DEPARTMENT Ms Ann Siegenthaler Department of Community Development City of Tukwila 6300 Southcenter Boulevard Tukwila, Washington 98188 • • . INE PERMIT •.i k LL93 -00042 Dear Ms Siegenthaler The Fisheries Department of the Muckleshoot Indian Tribe has reviewed the application for a Substantial Shoreline Development Permit for the SR -405 Interurban Interchange project. This letter reiterates the points raised during our conversation on 19 March. The project will increase stormwater discharged into the Green River. In addition, several new piers placed in the river will alter river hydrodynamics. Increased stormwater and altered river hydrodynamics near the new piers will adversely impact salmonid fish. To compensate for these and other impacts to salmonids, the IPA for the project directs that WSDOT will place large woody debris, root wads, and /or boulders into the Green River. Though all these structures increase habitat complexity, large woody debris with attached root wads provides the most benefit. It is our understanding that the current WSDOT plans for fish habitat mitigation depict the placement of approximately. 10 pieces of large woody debris, with and without root wads. This is a satisfactory arrangement and should be incorporated as part of the permit conditions for the Shoreline Permit, I thank for your attention to our concerns. If you have any questions call me at 931- 0652. cc: WSDOT / Tom Hamstra CITY ( I lj' ... j. MAR 2 3 3993, PERMIT crNiTrn Si Roderick Malcom Habitat Specialist 39015 172nd Avenue S.E. • Auburn, Washington 98002 • (206) 931.0652 • FAX (208) 931 -0762 .N R- 19 —'93 FRI 17:07 ID:WSDOT NORTH SEATTLE TEL NO: 206- 440 -4803 1:1942 P02 1' ► • 13,±T.1 uM.t w05E AIPitAP PSA OVA*. Vitt1 0 -t STPE,u LSE vt t?OTAN SEE L0,448I4*.. PAAH LhLI. NOAYx wATOA max SOL TO�I��rL10. pA SS TT�had. LCITtNO.n0 Vvotio mom. ktorirro vs OP twE tIICHHCR STUMP P uilYl0 566. I A1.0 art+C11 TO tUAt0ITt P.08t OA APPAOVED 011(1100. HAMAN ANCNP SL_ DETIA. D 1 000$ )U A4 OP 051UISnCOKtit. t TII u1MM1K t C.T. IIYY.. Ex. 1� LP STUMP COVER DETAIL A tl.t.j. Al. % STEIL N.0tt 011001 ON ACN 42'02 Yell* CILVIIJZEO (NAM. AO' Of 014.v. t.PMODED 1A C2110R1TC P.0.0. .. Y' CAty. STCIL CANE 1b FISH Stk..ctI. T CLEVCNT STAEAa SOC .40:TANON SC1 t.AwOSC•P• h•• AI•At. .KC WRAP PER OEi*L SPELT 0•S NQNIIAL PATER ULTI LPiDn►pG` WET7G AP -na $ ET 0.0 NEAV• L064 CACAO TO 000$ 0TKA$A7 6 LOC COVE. 3' OEM uMl„ v0 00.0uMN MNI 'e tI.STUL *CAI me APE KAa.f p�n��1'(E LOO sore 3r,TT OPACMAn1tt. yr ' R UPI 7,2•44 00710. gaokozass SIDE VIEW Ph TIP ILANAET 'OA RP•R.P xA nYAN AAC•OA ac OMTAl. I LOC COVER DETAIL V.T.L. 1TAE.44. 1(OsCTAT100 ftt LANOT. N.N3 PLAN Lola. Pu:t WU, Pt" OKUL. 194922 0-0 9'.P ,..040AU•l IATLA ATARI OtAO.un A/CICIA 1E0 DOTAA, D PROJ. NO. .00 ►uCOOO "I2' OLi .E.V.0AU,I NOI IUTLO 0011.001E ItlP•..P MA OCTAL, Ott /NttT 01 L •• Low SL 0 .AAP i�tTiir�i<u 'T ROOT WAD COVER DETAIL C /ATEA taTTuu DIVISION OP HI GHWAY5 PLAY VIEW �-- 3' A.N.1.0.vt :COSL AP••AP �T NIN 1trLA iIANAET DEADMAN ANCHOR DETAIL D r.9•4521 1 Lt P 02 .0001 01001 Oh( t11.0L:9 rfAfiw \ E' 00114 CO IITO •0200 0EttTj OT '10001 0L0••5 TO 02A0uu4 AnCNGA E TLf0 C+LA...DE cELptNC,?.TON LACA CABLE ATTACHMENT DETAIL f tir'"/f! I.•■ T j.'—t 'r /". /2h NAZI 511 HABITAT STRUMS/ PIJN A110 011.01.3 ARC ,ITCNOt0 t0 0t VKO .f + gun 1N INC Pt.CEIAENT 0110 OA0•TATI0N OF TN( 1T'*VC4U41 PILO O■l'STICN NA O. OE uSED OuR7.0 Ce$)TSIJ[tOM, ILL *OA; SHALL AE imago LAO 00000•LD 31 T0( t' a'CC0. us • wP� +5r R N T R A N C O g. .at ',WAWA • M•MA LAQp1 141116TOL A0VM. (*000.11 WASHINGTON STATE '' DEPARTMENT OF TRANSPQRTATION SR 405 SR IAI/GREEN RIVER INTERCHANGE 1 FH -I F15HPLANITAND 5DE AILS •u* 36 or 168 VS1'S ----MR-19—'93 FRI 17:09 J,D:LJSDOT NORTH SEATTLE TEL NO:206- 440 -4803 • t1(n NAI ?AT I 8007 ■W .:A'CO �.. SLL OLt AIL C \ P/• DLL. S1U1 DID OlinII0 1410S14LLVPER OCTAL B GREEN RIVER 24' 04.Iq. 3TII✓ PU OLIRL AA0 1.00 0000 OCTAIL 5 ER \ P201•AD 0.0 0 %E`pe,Aa c 0I244 44940AT \ FISH w911A7 A SOUTHCENTER BRIDGE STRUCTURE i c a -/ 2 W s 0 .Lsr T A1v. fIZN NAEITAT SEVEN S ErDE.fLCC rf" SIC X414 C`TL TA CICUT AL -BL BRIDGE STRUCTURE SI CNED 5' 5. SHERRD4 4 IVIED BY T. ETMEHIHGT ECKED B7--1. BERG •0J. ENGR. O. BERG ' r. ADM R. 0. ANDERSON DATE DATE 1 Re v1 -0014 LY 0 D 1 dB VALE IN PCDT me -TATO FED. Al D PROJ. NO, 1.0 0. .OV9C 1.0.44. 14;4.7 L0 t942 F03 ITr044 10C V lTAT'0" SIC LAD L AP.O0 Pt AN ;.•l:. E00'•AtA S:pppp �— h. 0C4oA 4IAYT (v06 4.0 STIE u ♦i♦Q41H 14 W p�Iau SII4+0 e6vi O'XP1N MANN t C•0. *.4M. 0641 106.0E AAA PLR DET4t AEI IPEET 0•S ER RC : IN lu IQI STUMP COVER OET 014;.. 941 C4 TA1WH EL LAAOSiArpo PLIM 147.0. up 0 eA' PO DIIA. /...40.0411 .0EA M.A •4. 0.4. I.0 111. * Dt.GG I'.2• A(OIE DV ;0441•.01 W An ±ANC4 907704 PLATT LEMMA 41P.RAP TO t4SSP6 *URINE., AND 06 ■4 0101.4.. 04 100 COY; ". I' URA. M41., 4 C.T. .44, A.0,04 TO OEIOUW rah i .alv, 07011 POPE AO PIA( CLAM.F SIDE VIEW iL.iLA FOd41 APCP D•AU M(• )EE of a D LOG COY STAo.'o TC 4COL1411GH �„r� —SLE SANDSUPn0 04.44* U•l2. N;A :E XPEDP PER DLTA14. SHEFT D•S ^410111A 0040444$ .hCI.OP Su vim, O WASH COn'A.C' O. rp01n Rig SI SE A•P•Ao 04.111 IN ROOT WAD COVER DE 4.,•7,9. DI VI SI ON OF H1 OHWAYS .. _MAR- 11 —'93 THU 11:59 ID:iJSDOT NORTH SEATTLE TEL NO:206- 440 -4803 14875 P02 u '� ..... DEPARTMENT OF FISHERIES HYDRAULIC PROJECT APPROVRL R.C.A. 73.20.2.00 R.C.X. 73.20. 103 Olympia, Washington 98504 February 26, 1993 _ (206) T53.6650 (applicant should refer to this dote in all correspondence) PAGE 1 OP 3 PAGES MAR 1 1 193 CC` " ? i't DEPARTMEIR't)F FISNE' its General Administration Bldg. JL11ST NAME FIRST LEI.. TACT PHONE(S) WA Dept. of Transportation 440-4536 19 STREET �RtJRAL Post Office Box 330310, ATTN: Liz Kriewald Seale JIATER Green River TER SECTION SECTION 24 �Tl1TE 11 CONTROL NUMBER 00- 58175 -02 I Q Q ZIP 98133 -9710 T IBUTARY TO t�uwamilh River TOWNSHIP RANGE(E-W) COUNTY ' 23N 4EWM King TIME LIMITATIONS: El THIS PROJECT MAY BEGIN See H APP ' IS • . A LARLE ON OS SITE AT AND ITS P. SIONS FOL 0 17 09.0001 T PE OF PROC Bridge conJEs . storm Outfall Sank Protection AND MUST SE COMPLETED BY Provision 1 BY THE PERMI AMC OPERATOR PERFORMING SF't' I1NPORTANI' CPI VIAL SIdi14 ON_ REVEL SI. IIESP NOTE: This approval is written with the understanding that the stcrmw�Iter conveyance system will be constructed and maintained as shown on the the submitted with your letter dated January 28, 1993. 1. Time Limitations: The construction of the Piers shall start after June 1 1993 and shall be completed before October 1, 1993.. This includes the removal of the sheet pile enclosure. If the construction of the piers and their footings cannot be started early enough to ensure baekfill of the footings as well as remoyal of the sheet ile enclosures before October 1 1993 then this,project shall be put off until the summer of 1694. The construction of the bridge other than the piers may be started after June 15, 1993 and shall be completed before December 31, 1994. 2. Excavation for the pier footings shall be completely separated from the flowing stream. This may be accomplished with the use of a sheet pile enclosure. 3. Except for driving sheet pile, equipment shall not enter or operate within the flowing stream. The equipment shall operate from the top of bank to drive the sheet pile for the pier footings. 4. Material ofmautgideQthenfloodtplaineet piling enclosure shall be 5. The sheet pile enclosure shall be completely sealed to prevent concrete products from leaching into the flowing stream. SEPA: FONSI - February 1983 REGIONAL RANI'jtT AGE • Joe Robel (206)'925 -2566 PATROL - Jyaa mpert APPLICANT • WILDLIFE - READER - PATROL - HAD. MGR. - WRIA ---MAR- 11 -'93 THU 12:00 ID:WSDOT NORTH SEATTLE TEL N0:206- 440 -4803 DEPARTMENT OF FISHERIES HYDRAULIC PROJECT APPROVAL R.C.K. 75.20.100 R.C.K. 75,20.103 Februa 26 1993 opplio.nt sha.+td r.far to this date In ell correspondence) PADE)OF 3 PAGES #1875 P03 1 1 K:93 DEPARTMENT -OF`- FISHERIES General Administration Bldg. Olympia, Washington 98504 (206) 753.6450 • MUST NAME WA Dept. of Transportation tz uATUlkreen River TACT PRONE(S) 440-4536 CONTROL NUMBER 00- 58175 -02 IEWRIA 09.0001 6. During the seal pour of concrete into the sheet pile enclosure the water level inside the enclosure hall be held at least six (6) inches below the water level outside the enclosure. 7. Water pumped from inside the sheet piling shall be routed to an area woe a all the silt and pollutants can be removed prior to reentry into state waters. 8. Baekfill around the pier footings shall be accomplished before the sheet pilin is removed. The backfill shall consist of clean material o sufficient size to remain in place during all flows. 9. The bridge stringers shall be placed with equipment working from the top of the bank. 10. Disturbed stream banks shall be armored with angular rock of sufficient size to remain in place during all stream flows. 11. Fish habitat components such as logs, stumps, and /or large boulders shall be included within the toe of the armored section at the low water line. These fish habitat components shall be anchored into the bank in a manner that will ensure that they remain in place throughout all stream flows. 12. Bank protection material and fish habitat components shall be placed from the bank. Dumping onto the bank lace shall be permitted only if the toe is established and the material can be confined to the bank face. 13. Upon completion of the bank protection portions of this project: steps shall be taken to revegetate the adored section. This may be accomplished by selectively placing soil within voids between the rocks and establishing willow or similar fast - growing vegetation that will provide shade and cover for the stream. 14. The construction of the storm run-off outfalls shall only be accomplished when the weather is predicted to be dry enough to construct the outfalls without the necessity of working within the flowing stream. 15. The storm run -off outfalls shall be armored as necessary to prevent erosion or streambed scour. The placement of armor material shall not reduce the stream cross section or capacity. 16. Armor material shall consist of angular rock of sufficient size to remain in place during all storm events. REV 10/16/68 ..._.. �,....... �..,..... �.... m...... w... n.: r. n. w. n++. naUnuH^. Hta�Hr' �ttW�..,. AYi=' Y.! tY4aa' w>: bv., n. m........ w...,... ....i..c........�....�......... � . MAR- 11 -'93 THU 12:01 ID:bJSDOT NORTH SEATTLE TEL NO:206- 440 -4803 IL: • • DEPARTMENT OF FISHERIES En HYDRAULIC PROJECT APPROVAL LC.W. 75.20.100 R.C.M. 75.20.103 © Febru_,aarry 26, 1993 #875 PO4 R EC; y MAR 1 11S93 DtikaINE1174F; :FISHER 1(cs General EAlihiiniittetYon i‘Pdg. olyepiS, Wuhinggton598504 (•ppticant should refer to this date in ail correspondence) PANES OF 3 PAWS •. TACT PROMS) T A t.'of Transportation 440 -4536 WTERGreen River ECOHTROL HMI 00-58175-02 EUIIA 09.0001 17. The ou fa• 1':'- shall „•be constructed in a manner that will protect the existing bank'veggtation. Where -the' vegetation is damaged, it 'shall..., e r *- estabiniehed,Zmmadiately upon completion of the work on the river bank. 18. Fresh concrete r concrete products, including the grout used between the str.ngere,,shall.not b allowed to enter the flowing stream at any time during this pro eat. All forms used for concrete shall be completely 'sale to prevent th. possibility of trash concrete or concrete products from getting into the stream. 19. a effort hall be employed to prevent silt laden water from leaving the site. LOCATION: 1 -405 crossing of the Green River. lt:52.018 REV 10/16/88 ..»..�....,a. .:iW :-tf.�..rucil.,. e.�:M1.:I..Y+.uT.r. ....Y.. ++.'f:. "fYl.t..- ...... ..Y7 ' ". .. .....'.�vY:C.t:h t'r� T. h"{' F^'Jf�uJ;s^I%:':fS`ft••n•:NF. -rl lra..z:,rv`.!. ,n,. s_r....ue.nu .a_� -re t-t� City of Tukwila John W. Rants, Mayor Department of Public Works Ross A. Eamst, P. E., Director M E M O R A N D U M TO: Jack Pace, Department of Community Development FROM: Brian Shelton, Public Works Department V4 DATE: February 5, 1993 ��_ SUBJECT: Shoreline Permit for Southcenter Blvd. /I -405 Interchange Project The Shoreline Permit application for the subject project is attached for approval. The Public Works Department is the applicant for this permit. The project primarily involves realignment of Southcenter Boulevard, Grady Way and the I -405 southbound on and off ramps and includes curb and gutter, sidewalk, drainage, illumination, trail extension along the Green River and landscaping. The landscaping reflects prior coordination by City and WSDOT staffs for this project to be compatible with future landscaping enhancements to be identified and provided by the City. The drainage improvements include surface water treatment (biofiltration). This application includes drainage revisions resulting from consultation with Department of Fisheries regarding requirements for Hydraulic Project Approval. The revisions primarily involve redirecting surface water for three (3) small drainage areas from direct outfalls to existing or new biofiltration swales. The scheduled bid advertisement date for project construction is April 22, 1993. Please advise me if you have any questions or need additional information. BLS:ad Attachment File: 85- RW02.6 (14:81) 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone: (206) 433 -0179 • Fax (206) 431-3665 a � Washington State' _ 5 Department of Transportatio v Duane Berentson Secretary of Transportation 1 UKINiLA PUBLIC WORKS February 2, 1993 Ms. Denni. Shefrin Associate Planner City of Tukwila 6300 Southcenter Boulevard Tukwila, WA 98188 District 1 15700 Dayton Avenue North PO Box 330310 Seattle, WA 98133 -9710 (206) 440 -4000 1L' uV = FED 9 4 iS93 co ijI';nt._!'JiTY D EV E LO Pry .i E I\' T SR 405 MP 0.81 to MP 0.98 SR 181 Green River I/C Mod. Dear Ms. Shefrin: Enclosed are the revised drainage planshat reflect the comments received at the field reviews in November & December 1992. Changes include the incorporation of stormwater runoff features and modifications to enclosed drainage system. We anticipate that these changes will meet with your approval and subsequent Shoreline permit requirements. If you have any questions concerning this submittal, or you need further information, please contact Liz Kriewald, at 440 -4536. RHN:lk enclosure cc: M. Rilling Dept. of Fisheries project file Sincerely, ,/( LPH H. NICHOLS District Environmental Program Manager 41= 2/4%I5 GiYawina'� J V-71 ..:.;•'+:1:116't:,.i ": -' SE' ri: A' 4S:. t; r' 1r°'.: 1 'S4'fi!ri:'t!�Y.r;.M..`,ii;•n'.x Washington State Department of Transportation 2 193 IED 1 LI4`MVJGti;y\`a PUBLIC _vv. w v�. Kn: mntxv»: nwrwu •rs+sxrsmaan +•e+•r�irFaa+� :z District Duane Berentson Secretary of Transportation Mr. Joe Robel Regional Habitat Manager Department of Fisheries P.O. Box 43155 Olympia, WA 98504 -3155 Dear Mr. Robel: January 28, 1993 eee- 1NaJOI% ,16611 -. ) 15700 Dayton Avenue North 96) n, PO Box 330310 Seattle, WA 98133 -9710 (206) 440-4000 RECEIVED F_L73. 0 11S93 CQ(V111;7i ,m -ry DEVELOPMENT SR 405 MP 0.81 to MP 0.98 SR 181 Green River I/C Mod. Enclosed are the revised drainage plans that reflect the comments received at the field reviews in November & December 1992. Changes include the incorporation of stormwater runoff features and modifications to enclosed drainage system. We anticipate that these changes will meet with your approval and subsequent HPA permit requirements. If you have any questions concerning this submittal, or you need further information, please contact Liz Kriewald, at 440 -4536. RHN:lk enclosure cc: M. Rilling City of Tukwila project file Sincerely, ie,c7t-L RALPH H. NICHOLS District Environmental Program Manager * zAh5 l *' � November 3, 1992 Mr. Thomas C. Hamstra Project Engineer Washington State Department of Transportation 15700 Dayton Ave North P.O. Box 330310 Seattle, Washington 98133 -9710 Re: SR 405 - Interurban Avenue Interchange Entranco Project No. 90050 -10 Dear Mr. Hamstra: The following information is furnished for your use in preparing the application for the "Shoreline Permit" required for this project. 1. Approximately 3,200 cubic yards of excavation will be required along the west bank of the Green River for construction of trails. The west bank is loose to medium dense silt and sand. 2. Minor channel improvements will be required at the AL -BL Ramp crossing of the Green River and at the Southcenter Boulevard crossing of the Green River to provide a uniform slope for placing riprap and to conform to the "O- rise" design criteria. Approximately 1,750 cubic yards of material will be removed from within the limits of the channel for this work. Some weathered sandstone may be encountered along the west river bank at the Southcenter Boulevard crossing. The remainder of the excavation will be loose to medium dense silt and sand. 3. Approximately 12,700 cubic yards will be excavated for the drainage swale located north of Southcenter Boulevard between the AL -BL ramp and Interurban Avenue. The excavated is within an area composed of medium dense silty sand. 4. Approximately 2,220 cubic yards will be excavated within limits of the Green River channel for construction of footings for bridges. This excavation will be medium dense silty sand and gravel. Some weathered sandstone may be encountered on the west bank at the Southcenter Boulevard crossing. Prints of the bridge plans showing the required excavation are attached. Please call if you need any additional information. Sincerely, ENTRANCO Bruce W. Berg, P.E. Project Manager BWB:ahw City of Tukwila Department of Community Development TO: Brian Shelton FROM: Denni Shefrin DATE: August 28, 1992 SUBJECT: Southcenter -I -405 Interchange MEMORANDUM • John W. Rants, Mayor Rick Beeler, Director 6i G / -- L7 The Planning Division understands that the City (Department of Public Works) will be acting as the applicant for the Shoreline Management Permit (SMP) for the above project. Based upon the draft landscape plan provided to me August 25 meeting, .I have the following comments: 1. A cover sheet should be included which shows all existing and proposed street improvements at a reduced scale; 2. Delineate the shoreline management environments including the 100 -foot and 200 - foot buffer areas in accordance with the City's Shoreline Zone regulations; 3. All plan sheets should be dated including revision dates; 4. Confirmation from the WSDOT that the landscape plan conforms with DOT criteria; 5. The SMP application should include a discussion on the proposed lighting scheme to include intent and objective. The permit may contain a condition which would require submittal of a final lighting plan to DCD for review and approval. Once the SMP application is submitted, staff will evaluate and compare the pry posed landscaping to previous landscape plan scenarios on file and provide recommendations for revisions where applicable. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax 12061 431-3665 1111 mom N m m z tA XI MI m ▪ a O z -a m x x z Z c1 m 5 ■4 jSTATtj FED. AI 0 PROJ. NO. C, ai m z z P3 73 M a M 0 N z H m A 4 x z z m ; F P 0 0m Y 0 0 0 L 12.0.00 • I o' I .. I 1 1 I 1 I .u. � ...............I , I. ... I.. � $ . . I .. . . . i i... •.20 26.60 v.PJ. n j ' w' I1 ;.... ,..... . ... ...! .. '35 . . 35.44 P.C.Y.C. • • ,3176 V.PJ. "•35 13 'j . �i�'t 9'5.00 .. • . 'I IO.cx 07 510E 9'' •'47.24. .. 16.61 VJ'J.'9 61 . 463 ^. . 15.0 E.V.C. 455 ... .. 11.94 O.V.C. ..... 1... 31J6 7./ ./ ................. i.. ,. .. .... . ... .25•. 71.12 E.J.C. 1 1-0 .+ 70.75. 6.0.0 ' ' 1 .... 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I I j I , i I n.. s; i '.35 3L2B V.P.0 • 11.19 E.v,C, :E3 C3 C-1 m z a m O -4 z m z z L-$ m RA N 6 1.1 t"f • 8, s I I •7535.50' I 1 I I.. .... .I .... ..: .... ..... i ....1. � ..... ..........1 i .. it 11 2 N 0 • • August 20, 1992 TO: Ron Cameron Ross Earnst Don Williams RECEIVED AUG 2 51992 FROM: Brian Shelton COMMUNITY DEVELOPMENT SUBJECT: Southcenter Blvd, 68th - Grady Way Trail and Rest Area Project #85 -RWO2 WSDOT requests the City's concurrence on the design of the Trail and Rest Area portions of the project as shown in the attached plans. City's response is requested by August 31. However, if reasonable, we can possibly respond at landscape review meeting scheduled for August 25 at 2:30 PM. The consultant wants to know if the City wants lighting on the trail. If so, where and what type? The consultant was not able to attain maximum 5% grade in two segments of the trail, each approximately 120 feet in length on alignment Tl. Please review attached info and advise me before Tuesday afternoon if we can include this item in landscape meeting. cc: Denni Shefrin (w /plans) file: 85- RW02 -8 S • 1 Aft I-71 Washington State Department of Transportation District 1 15325 S.E. 30th Place Bellevue. Washington 98007 -6538 (206) 562 -4000 Old Address August 20, 1992 Mr. Ross Earnst City of Tukwila Director of Public Works 6300 Southcenter Boulevard Tukwila, WA 98188 SR 405 OL -0755 SR 181 / Green River I/C Southcenter Boulevard Green River Trail Design Dear Mr. Earnst: Duane Berentson Secretary of Transportation New Address: 15700 Dayton Ave. N P.O. Box 330310 Seattle, WA 98133 -9710 (206)440 -4000 We are requesting the City's concurrence with the Green River Trail design as shown on the attached plans. These plans include the R/W and Alignment Plans, Trail Profiles and Contour Grading Plans for this project. Alignment and profile grades of the trails have been changed to reduce the maximum grades and bench the trails into the river banks beneath the structures per the backwater analysis. We request the City's response by August 31, 1992. If you need any further information or have any questions, please contact Roy E. Grinnell at 440 -4313 or Renato de Leon at 440 -4314. REG /rdl cc: files OL -0755 405tuk02.doc Sincerely, THOMAS C. HAMSTRA, P.E. Project Engineer RECEIVED AUG 2 0 1992 TUKWILA PUBLIC WORKS ".°. .**.∎..-. RECEIVED AUG 2 5 1992 EVE OPMENT WSDOT provided attached landscape plans and details for City review prior to meeting scheduled on August 25. WSDOT would like concurrence or guidance on plan prior to submitting Shoreline Permit. These plans presumably represent the conclusion of discuss- ions last year between Public Works, Planning, Parks, WSDOT and the consultants. file: 85- RW02 -8 ` , TO: Brian Shelton FROM: Denni Shefrin DATE: July 10, 1992 SUBJECT: Shorelines Permit Submittal'for Southcenter Boulevard Interchange Following my review of the set of reduced plans you provided, I have concluded that a majority of the drawings would not be applicable for the SMP submittal. I reviewed the SMP submittal checklist today with Roy Grinnell and indicated that the drawings provided must satisfy the shorelines criteria including shoreline profiles with cross - sections, delineations of the shorelines environments, etc. Full size sheets should be provided. I don't believe PMT's are necessary at this time. In summary, the drawings need only address areas contained within the Shoreline Zone (see application checklist attached). A drawing must also be provided showing the entire project with the shoreline and 200 -foot areas on either side delineated. Please let me know if you have questions. • TO: FROM: DATE: SUBJECT: Rick Denni July 8, 1992 f �IC�n t. 4e. Aca lidl /J /,(J SHORELINES PROCESS FOR PROPOSED HIGHWAY IMPROVEMENTS FOR SOUTHCENTER BOULEVARD. (Meeting scheduled with PW at 4p.m. today) ISSUE: Was public notification process adequate when ASSESSMENT was prepared in 1983? 2. Should a public hearing be conducted prior shorelines permit for the same project? ENVIRONMENTAL to granting a In 1983, the City's Planning Director confirmed that no request for a public hearing was received following public notice for the EA. Subsequently, a FONSI was finaled. The project as it is proposed, requires a SMP. The Planning Director further can exercise his discretion and schedule a public hearing if requested by the public or if there is sufficient reason to open the review process to further public input. Design engineering is nearly complete for the project based on the preferred alternative discussed in the EA. ISSUES: Landscaping. The planning, DOT & Public Works have "worked out" a landscape plan taking into consideration the area as a gateway. The following questions must be addressed: 1. Are there additional unforeseen impacts subsequent to the EA? 2. Are the impacts being reasonably mitigated? A wetlands study has been conducted and has concluded that there are no wetlands. Staff agrees that the project is significant and that a significant amount of vegetation will be removed. Staff is not satisfied with the quality of landscaping proposed for replacement at new the locations. DOT has informed the City that there are budgetary limitations to landscaping. A conceptual landscape plan has been prepared which incorporates input from the City's planning staff. While the City identifies this area as a gateway, DOT is not in a position to increase the amount of landscaping which would further the gateway theme (larger trees). The City's Public Works Department has indicated that at some future date, there may be opportunity to increase the amount of landscaping. By what mechanism? What would a public hearing accomplish now? The Planning Commission has no decision authority under the zoning code for a SMP. A hearing can be looked upon as strictly an opportunity to present the project to the public, however, there appears to be no design flexibility. The SMP process requires public notice in a local newspaper. WAC 173 -14 -070 provides additional methods of notice including mailing, posting of the property, or any other method deemed appropriate by the local jurisdiction. A request for a public hearing can result from the noticing process. Recommendation Conduct thorough noticing including posting, mailing, and advertising. Include in the notice that hearing may be scheduled only if requested (or some such wording which we can discuss). If there is not request, issue permit. If a hearing is to be conducted, determine the scope of review by the Planning Commission. Optional: Condition permit on additional landscaping to be part of Public Works budget which would also specify a time for installation (phasing if necessary). • 1 ~� *ILA ,qS City of Tukwila • 6200 Southcenter Boulevard o Tukwila Washington 98188 • 1908 Gary L VanDusen, Mayor 1 June 30, 1983 Washington State Dept. of Transportation 6531 Corson Avenue South Seattle, WA 98108 ATTN: J.A. Klasell, PE District State Aid Engineer RE: Environmental Assessment, Sou Boulevard Improvement Project.80- 28 -20; M -1147 (5) EPIC - 185 -82 Dear Mr. Klasell: thcenter The Draft Environmental Assessment for improvement to Southcenter Boulevard has been advertised as to its availability for the purpose of obtaining public comment thereon. As of the closing date for receipt of comments, no requests for public hearing were received. Comment letters received and.agencies' responses thereto are included as an appendix to the assessment. We request, therefore, that your office.:.assist us• in completing the environmental assessment process by requesting the District Administrator of FHWA to issue a "Finding of No Significant Impact" (FONSI) for the Southcenter Boulevard Project. Thank you for your attention to this matter; please direct questions to my attention. TUKWILA PLANNING DEPARTMENT A' Bradley J.ns AICP Di rector xc. Entranco Engineers Public Works' File Enclosures (5) • Affidavit of Publication STATE OF WASHINGTON COUNTY OF KING Ss. Cindy Strupp oath, deposes and says that she is the chief clerk of THE DAILY RECORD CHRONICLE, a newspaper published six (6) times a week. That said newspaper is a legal newspaper and it is now and has been for more than six months prior to the date of publication referred to, printed and published in the English language continually as a newspaper published four (4) times a week in Kent, King County, Washington, and it is now and during all of said time was printed in an office maintained at the aforesaid place of publication of said newspaper. That the Daily Record Chronicle has been approved as a legal newspaper by order of the Superior Court of the County in which it is published, to -wit, King County, being first duly sworn on Washington. That the annexed is a Opportunit....f.or...Pub.li c H ear. in.g as it was published in regular issues (and not in supplement form of said newspaper) once each issue for a period of two consecutive issues, commencing on the l8tiayof March ,19 8 3 , and ending the 2 5 tia ay of March ,19 8 3 both dates inclusive, and that such newspaper was regularly distributed to its sub- scribers during all of said period. That the full amount of the fee charged for the foregoing publication is the sum of 5 5 3 • $ ? which has been paid in full at the rate of per folio of one hundred words for the first insertion and per folio of one hundred words for each subsequent insertion. . .i. ...Chiaf...C.l.erk Subscribed and sworn to before me this 2.5th day of March , 19..8.3. Notary Public in a or the State of Washington, Yesiding at i}eilk King County. Federal Way — Passed by the Legislature, 1955, known as Senate Bi11281, effective June 9th, 1955. — Western Union Telegraph Co. rules for counting words and figures, adopted by the newspapers of the State. VN ,87 Revised 5/82 :. Public Notice hearing and/or a copy of the Environmental Assessment 'should be made in writing to .Phillip R. Fraser,•Senior En- gineer, •Public Works De- partment, 6200 Southcenter Boulevard, .Tukwila, Washington 98188. Comments . on the En- vironmental Assessment and request for the public hearing must be presented in writing to Phillip R. Fraser Senior Engineer, Publi: ..Works . Department, 620C .Southcenter Boulevard, NOTICE OF OPPORTUNI- Tukwila; Washington 98188, TY FOR PUBLIC HEARING ' by April 18, 1983: AND AVAILABILITY OF AN The opportunity for public ENVIRONMENTAL AS- hearing also closes on Apri SESSMENT ON SOUTH- 18, 1983. It is the purpose o: CENTER •BOULEVARD, this notice to provide inter - 62ND AVENUE SOUTH TO ested persons the opportun• G R A D Y •WAY TO BE ity to participate in the Tulles: UNDERTAKEN BY CITY exchange of informatior OF TUKWILA • - _ possible regarding the effect Incoordination with the on 'the• community of 'the Federal Highway Administ- project being considerec ration and the Washington through full discussion ant State•Department of Trans examination of the planninc portation.the City of Tukwila to date. This purpose is ir• publishes this first notice of consonance with and pur opportunity for a public hear- suant to the Federal Air ing on the proposed project. Highway Act (Title 23 U.S.0 Notice is given that an 101 et seq., 128) anc opportunity for requesting a amendments thereto ant public hearing is hereby ex- the Department ofTranspor tended to discuss the pro- tation Act (Title 49 U.S.0 posed undertaking and the 1651 1957 (E)). - adequacy, accuracy and Published in the Daily Re completeness of the en- cord Chronicle March " 1: vironmental assessment for and 25, 1983. T1827 the realignment and widen- - - - • - . - ing of Southcenter Boulevard from 62nd Av- enue South to and including • the west approach to the Grady Way Bridge. This realignment includes three. (3) new bridge structures, including 1 -405 on /off ramps at Interurban Avenue South and two .crossings of the Green River. This notice will also serve to publish the availability of the Environmental Assess- ment which has been pre- pared for the proposed pro- ject in response to the Na- tional Environmental Policy Act of 1969, and to invite comments regarding the im- pacts of the proposal from all interested parties, for a period of 30 days from this publication date. Requests for a public nY Ms. SITU -Y ANP OON w SPOT FAX ✓CF2 - I p S FROM: AN 1Y DATE: 4 / 1 /9 1 I JK ELA 17017 /' THIS INCLUDING PHONE #:' ' -13I ` 3Co70 5 FAX #: CITY OF TUKWILA 6200 SOUTHCENTER BOULEVARD, TUKWILA, WASHINGTON 98188 April 1, 1991 Ms. Sally Anderson, P.L.A. Washington State Dept. of Transportation 15325 S.E. 30th Place Bellevue, WA 98007 PHONE # (206) 433.1800 RE: I- 405 /Southcenter Blvd. Interchange landscape Dear Ms. Anderson: Gary 1.. VanD:ise,,, Mayor Attached is the conceptual landscape plan which we discussed by phone on March 18, 1991. This reflects the comments of the Department of Community Development (DCD) staff and issues which we would like to see addressed in this project. The plan includes the following elements: a) A minimum 100' natural shoreline buffer zone, extended to the on /off ramp and the drainage swale along Interurban. Due to the fact that this is a shorelines area, and that all existing shorelines trees apparently will be removed, DCD will require some large replacement trees for the Shorelines Permit. Trees within the 100' shorelines buffer area should be a minimum of 2 -1/2" caliper for deciduous or 8' -10' for evergreen, spaced a maximum of 50' on center. b) Retention of existing trees wherever feasible. According to DOT's grading plan, no grading will occur on the east side of Interurban or the east side of Monster Road. Existing trees on the west edge of Interurban near the bridge (at the proposed drainage swale) will apparently not be affected by any grading. Please let me know if this is not an accurate reflection of the project grading limits. c) A provision for future development of a community "gateway." At some future date, the City would like to develop a gateway concept for the Southcenter Blvd. /Interurban intersection. The gateway would include larger street trees and possibly a sign /sculpture. We envision a stand of poplars, in a single or double row; however, the actual design would need to be reviewed by the landscape architect, DOT and other Tukwila departments. Ms. Sally Anderson, WSDOT I- 405 /Southcenter Blvd. Landscape, 4/1/91 Page 2 The attached plan reflects DCD's suggestions for this gateway development. It is understood that the current I -405 project does not include larger street trees or irrigation, but that some minor revisions could be made in grading and planting beds. c) For the Southcenter Blvd. /Interurban intersection area, DCD would like to see the following incorporated into the current project: • Areas of open grass around the intersection. We understand that this area would have low maintenance plantings and could not be irrigated. • A 20' -30' wide grass "bench" to provide a level area for future street tree planting; • Special shrub or tree plantings as a backdrop to future street tree plantings. This could be accomplished by using one type of tree from the DOT plant list as an accent, or using one of the more colorful shrubs, etc. The intent of these recommendations is to provide guidance for final permit drawings which will meet Shorelines and the Board of Architectural Review's (BAR) design review requirements, but which will also be consistent with DOT's I -405 program and the project budget. After submittal, the applications for Design Review and Shorelines will be reviewed concurrently. A complete design review application should be submitted at least 60 days in advance of the desired BAR hearing date. Shorelines review requires a minimum of 90 -120 days. When you have had a chance to review the plan, please call me for further discussion. Your comments and /or suggestions are appreciated. Sincerely, Ann Siegenthaler Assistant Planner cc: Brian Shelton 17/40, 1 of 140f' /N. Coivii) 1,44 EX( 5T1\ MOWN utitvioWN 6twsr5 FU7vPri fler-E7 7F5 (parLAR OR imic.i4t19 P0,55/ Aei (6-Nfri)tpti 20- 30'vvr. MowN"etNe k06 Mci6-711•,(5 Pa1/21fik. ForukE: orNAmpv-IAL- 1 4--ref:.; (0'1541i (4,55 el/ EX 577 w 12E. WAIN 1)0\e-i-1 ON MOWN O.PA%r5 Po.51 F(7vRE 5 iGN 1-11-6 ZC)-- 30/ W11 MOWN`tefw FinuRr: TFS (pc:TUNI2 c7R SIMILJA9 AO6 Mr141. uf/trAri4 *mei* • 5-r-/ 111k PO.5.5/f 4 1 T vg E (6-7\1frt14..pivt__ 2'O- 30" 0) 1.1:=E movvt\i t\e4ifi • A. 4or "I • g 16,0011"., c 1)01.(9p15- (ir (16ar-ov:, r Cor-00 0,0,1e/,aie:e2.) �r falk (1...v0Aey. tvio.o,A Li • rA 0 too E2222Esseal, ter_-_w/ NOci14 'R .�,. ,.a.:r.u�u r.•a +r:�ru;F+tvr.W., ryi,•ettisn•;m.w7rr_ssun :.axa.rn+7:.Yi:�r.;. uzw•dt`Y.7i7"r.;d�7::.T:.. `.M.: ". +.`WIZ.Evi >+.‘701,£,t W,tAV,. -ON n+ vms... .mrc.,.�..�re.,,�.�:,...,.,.,.. ..._,..._.......,�...,. C 00/9/ 77; j) 1O, / is. Four B-12.0110 : L7bAJ S-(44.7-ezr: Afe..vp ,Aotoy ‘04,y) Peer- L,rd..sriu 4 ,¢AQde iS me Gitclit;u2.S /53eres /4-74 ,e-44 a,Qrers S ed ift -74 :S�o7 ,'e /(vti- at 9; t? 4 //. MEMORANDUM HOUGH BECK & BAIRD INC. 1000 Lenora Street, Suite 516 Seattle, Washington 98121 (206) 682 -3051 P.2/4 RECEIVED AN 2 8 1991 Date: January 28, 1991 TUKWIL/ PUBLIC WORKS Re: Interurban Avenue /1 -405 Interchange Project Minutes of Meeting From: Jim Howard, Hough Beck & Baird Inc. Project Number: 09026 Date of Meeting: January 24, 1991 Purpose: The purpose of this meeting was to receive comments from WSDOT and City of Tukwila concerning preliminary landscape plans prepared by Hough Beck & Baird. The following minutes of the meeting include Action Items that will need to be resolved prior to proceeding further with landscape plan development. Hopefully these Action Items can be reviewed and resolved prior to our next scheduled meeting at 9:00 a.m. on Thursday, January 31, 1991. Location: WSDOT office Those Present: Bruce Berg - Entranco Engineers Jim Howard - Hough Beck & Baird Inc. Colie Hough -Beck - Hough Beck & Baird Inc. Brian Shelton - City of Tukwila Catherine George - WSDOT Bill Sensor - WSDOT 1. Catherine presented a plan prepared by WSDOT (Sally Anderson) that modified the preliminary landscape plans prepared by Hough Beck & Baird dated 1 -7 -91. The plan Includes a plant list of recommended trees, shrubs and groundcovers for the project. Catherine stated the WSDOT recommendations are based upon the overall master plan for the 1 -405 corridor. Action: WSDOT (Catherine) to provide Hough Beck & Baird copies of plans and specifications for similar interchange projects within the 1 -405 corridor to serve as design standards for this project. City of Tukwila (Brian & designated person from Planning Department) to review WSDOT plan and plant material recommendations to determine If they are consistent with City requirements. .ii lY•Ji • Memorandum January 28, 1991 Page Two P.3/4 Who: WSDOT and City of Tukwila Public Works, Parks & Recreation and Planning Departments. When: Prior to next scheduled meeting, January 31, 1991. 2. Catherine stated street trees and maintained lawn will not be funded or maintained by WSDOT. Brian stated the City does not want to incur the costs of lawn maintenance, Action: City of Tukwila to confirm limits of irrigation or maintained lawn within this project. City also to determine if street trees will be required. Who: City of Tukwila Public Works, Parks & Recreation and Planning Departments. When: Prior to next scheduled meeting, January 31, 1991. 3. Brian presented a redlined landscape plan showing City of Tukwila Parks & Recreation and Planning Department comments. Generally the redlines followed the planting alternative "B" concept of informal planting of trees with open spaces planted with erosion control grasses. Action: City of Tukwila to confirm preferred planting plan and plant material types for use on this project. Who: City of Tukwila Public Works, Parks & Recreation and Planning Departments. When: Prior to next scheduled meeting, January 31, 1991. 4, Jim presented a Green River trail study for the trail between Southcenter Boulevard and Interurban Avenue. Bruce stated the on /off ramp trail underpass will only have 6.35 feet vertical clearance above the 23 foot high water elevation. If the trail underpass elevation must go below the 23 foot high water elevation to allow sufficient head clearance then an alternative trail loop will be required for periods with flood conditions. This alternative loop possibly can occur to the north of the on /off ramp /Interurban Avenue intersection as shown on the trail study plan. It has not yet been confirmed whether a twelve (12) foot wide trail can be provided between the on /off ramp and hillside to the north without requiring a small retaining wall at the toe of the slope. A narrower trail may need to be considered at this location. Action Needed: City of Tukwila to review trail study and provide comments and recommendations for trail layout. City also to confirm construction budget available for this work. Who: City of Tukwila Public Works, Parks & Recreation and Planning Departments. Memorandum January 28, 1991 Page Three When: Prior to next scheduled meeting January 31, 1991, cc: Bruce Berg - Entranco Engineers Jim Howard - Hough Beck & Baird Inc. Colie Hough -Beck • Hough Beck & Baird Inc. Brian Shelton City of Tukwila Catherine George - WSDOT Bill Sensor - WSDOT Sally Anderson WSDOT Don Williams - City of Tukwila M E M O TO: Rick FROM: Denni DATE: July 1, 1992 SUBJECT: Southcenter Boulevard Interchange I just wanted to inform you that as a follow -up to a meeting held today with Entranco, Dept. of Transportation and Brian Shelton, it was determined that the City would be the applicant for the Shorelines Permit. It is critical that you and I confirm the scope of review by the Planning Commission for this project. At the onset, DCD has been working extensively with the consultant, DOT and PW on the landscape plan, issues related to creation of a gateway, trail amenities, and identification and treatment of potential wetlands. Bridge design, roadway improvements /location and signalization has been determined and the engineering nearly completed ,following the Environmental Assessment (EA) process initiated in 1983 which included public review. It is essential that the Planning Commission be limited in their scope of review to address only landscaping, gateway issues, trail amenities and wetland mitigation if applicable. There is currently a re- evaluation of the EA to address three additional components: 1. Wetlands 2. Floodplain /backwater analysis 3. Traffic Counts The Dept. of Transportation is acting as lead agency to accept the re- evaluation reports as part of the final EA. Regarding wetlands, Gary believes based on prior review, that whatever wetlands exist within the project boundary, may be negligible. He will be reviewing the wetlands report recently completed prior to making final recommendations for mitigation if required. Wetlands mitigation can be conditions of the shorelines permit. You may anticipate a conversation with Ross Earnst regarding clarification on Planning Commission's role. (Again, to allow for further public input.) Please let me know when we can meet prior to July 9 to address the ..,..e.,..ro. .,u+ Ia.*.14ac......3 Planning Commission process. Thank you. cc: File Jack Pace JUN 05 '741 14:21 To: From: Date: Re: HOUGH BECK & BAIRD INC. 1000 Lenora Street, Suite 516 Seattle, Washington 98121 (206) 682 -3051 (206) 682 -3245. FAX FAX TRANSMITTAL 1uy� Ttkwa. ar"ettek.cw_ P.1/8 Attention: YatilktdiLlaat5 • 186.14t AM St4Me AiteAeg � °T;i:M 1.11 1 � atAewies z4 tvg■kl seefidfri ybur t r A� e vet , As* t Ferv4tAtelkavt Total number of pes a g including includin cover sheet: +01 Message: If full transmission is not received or copy is not legible, please call. 31_11 I 05 '1 14 P 8 - ..,••••• • /1.40 11 •-7! 4t.••.• .a1:7" • k) • :sr • • • • . • . • • ' • ••••■•••-••••-••■•••••••■•••■••4111••••••• 41-4' a, 1501.144,4, VI*41t.4CA BA, IM• t ti 41N, 14itg7k. TIF s " Fts-r te6E P411. Et:41.P.Q 1/47ithAI, tgiA41-1145. .501:M W NA•CoNE.g.ez tiMN faa.T SgT W Dot) larrozrerstosia, %Iwo " W, E1S,*01.-T v4/ ODLDEF DikiL-1- +404-e. FD‘1., fitsx4..ocx. • Fiti4t1t,OGg., 15Y C>NNISJC. 6tFADE OF .00C1114%11... URPir-SrUfZED SUit-4-tickkte. CZWIIIED • CA.06f. REMOVEABLE BOLLARD. tlickZircif)crti4 TUT earNIEF_44. kC, 4 CCNC. ,:g.COM FINISH TClia CONC • JUN 05 '91 14: P. 4. 8 SHEET NO. OF e ENTRANCO ENGINEERS, INC. JOB NO. - - PROJECT CALCULATIONS FOR MADE BY DATE CHECKED BY DATE If 41 — ..12:/p+ 0,07:frr o.zS' 1.*r CoilcR.ETE. o.' Ri.) b SORPACI NC.v lk% S. CGL)k.SE. •TR4,11. Ot\i sr -71-0+40 TO %TA "k" s +.1 o - ceo To *-7 (4, - 3+1-7 c.Ra.0 S 3:4 tke..ex (Aim) — 0 ..es" AS P14 X. LT CO C.,14.`CTE M MS 117 L. 11/4 R L CT 0 t■ " STk 3 -44.22'" "TO T 3 - 4- O3 ItatSF-C) "MALL 1)6,1"NtL Y E4TFAMCO F.14600%sgS TimberForme Aresr'" I anlltl, WO' 1 I,.. 11 1 Litter Container, Open Top 2252.OT 2'C" 2'0" 2'6" Surface 3" x 4" 0" 7' Mr M^ Surface 3" x 4" Flat lop 2252.FT 2'0" Dome Top 2252 -DT 2'0" 2'0" 3'1" Hsmpsr Top 2252 -HT 1;:or intormation on other 4tytes of litter containers Nee pbec:s 20, 21, 27, 9, 44, 47, 49 ana 52, Surface 3" x 4" 2'0" 2'0" 3'2" Surface 3" x 4" Color•coated flat steel trams with kiln -dried wood surround. Includes 36- pslion steel finer. J May also be specified as a planter (Model 2254), ind /ca height peaked. 2252.0T .2252-P1' 2252 -DT 2162 -HT TlmberForm°Msrottb'" M,nlla 1 :nlpl, 17•,•I, Litter Container, . Open Top 2107 -OT 1'11" Flat Top 2107 -FT Dome Top 2107 -DT Hamper Top 2107 -HT I I, �u 1111 f,A,nud�''1 r•i, d 1nI it VI 2'6" Surface 6/4 & 8/4 Patterned 1 } 1'11" 1'11" 2'7" 1'11" 1'11" 31" • 1'11" 111" 3'2" Surface 6/4 & 8/4 Patterned Surface 6/4 & 8/4 Patterned Surface 6/4 & 8/4 Patterned For information on other styles of titter containers see pages 20, 27, 29, 38, 44, 47.49 and 52. 2107.0T TlmberForme Parkway "' Color-coated flat steal frame with klln»dried wood surround. J Includes 36•gallon steel liner. ,l May also be specified as a planter (Model 2109), indicate height dsalred. 2107 -FT 1,100h =an 2107 -DT Ivik.na diliu Litter Container, Open Top 2086 -0T 2'0" 2'0" Flat Top 2086 -FT 2'0" 2'0" Dome Top 2086 -DT 2'0" Hsmpsr Top 2086 -HT 2'0" 2'6" Surface ti"1101,0 V '01I 2'7" Surface 3" x 4 ", 3" x 8" Surface 3" x 4 ", 3" x 8" 2'0" 3'1" 2'0" 3'2" Surface 3" x 4 ", 3" x 8" For intormation on otttvr atytus of Color"eoated flat steel frame with klin -dried wood surround. IIUut. containers seu Payee 21, 2'1, 2u, ,/ Includes 36- gallon steel liner. s, 44, 47, 49 and 62. ,/ May aso be specified as a planter (Mods! 2088), Indicate height desired. u 2946.0T 20a6-OT _iuH 11_. 'jj 14:a4 • • The Timberf~orm "' CycLoops' • -- CycLoops'" bike racks are designed to accommodate from five to 13 two - wheelers in a simple, functional solution for bicycle or moped parking. TlmberForms Cycleopel GycL.00ps'" f�1u,1,:r CycLoops'" are stocked hot -dip galvanized. Standard colors are TimberForm Black, Blue, Bronze, Brown, Green, Red, Tan or Yellow. t.cn:)u1 Ilkoh 1 1001 d r' . 6..' 8 Selected photographs appear on page 58. custom designer colors or stainless steel are available on special order. 2170 -5 3'3" 3" 2170 -7 5'3" 3" 3'0' Embed 2.375" 0.0. 3'0" Mounts„) Embed t'■1;,: Si,', 2.375" 0.0. 21708 7'3" 3" 3'0" Emoeu 2.375" 0.0. 2170 -11 9'3" 3" 3'0" Embed 2.375" 0.0. 2170-13 11'3" 3" 3'0" Emma 2.375" 0.0. -10 Add this suffix designation for pedestal (surface) mount. •G Add this suffix designation tor galvanized pipe. Standard unless otherwise Specified. 1 2170-5 a 2170 -7 r 2170.9 1174.11 11 -C Add this suffix designation for color•coated pipe. -5 Add this Suffix designation for stainless steel pipe. Round steel pipe. ,/ the numerical suffix (example -5) indicates the number of vehicles accepted by the bike rack. Installation detail for the CycLoops'" pedestal (surface) mount option. Includes bell -base flange cover for Oath leg. Specify modal number plus the suffix -P. Qim t.41.— installation detail for the standard direct embedment CycLoops' ". Each leg is factory drilled to accept No. 4 rs-bar (by others) to facilitate concrete anchorage. Lege extend at least 10" below grads. 2170 -13 Illustration: TlmberForma CycLoopa'" 2170-13. 'The largest CycLoops`" can accommodate up to 13 two-wheelers. 1...11 • to MQ�42-2054 Models 2056 - 2062 18 # • , ;••••• 1•.1,Lo. ,••• TImberForme Parkvisr mow) ,:nclin VI lmrytil sr!: if 1.1(1101)1 NrIminal \Nona Slit' Integra! Table and Seats 2056 5'3" 5'3" 2•8" 1'4" Embed 3" x 4". 3" x 8" -P Add this suffix designation for pedestal (surface) mount, •471r1h444.44■.4p4.4444.44.4 Color-costsd square tubular and flat steal frames with kiln-dried wood slots. ,/ Matching litter container, 2086. s/ Can also be specified with only one, two or three seats. ,/ For wheelchair accessibility specify Model 2057. Checkerboard 2095 available for this table. TImberFerm• Parkway" Nth ■:i bpi ilmo Eitoll Fit:11111i '4,1011.1"i NtA13411,11 W.•■••■J :••••• Table with Four Seats • 2054 5'3" 5'3" 2'6" 1'4" Embed 3' x 4, 3" x 8' •■••••••IIIIMINWIRM. 411 ••■•• &&&&&& •o -p Add this suffix designation for pedestal (surface) mount. • -- ---- ColoobOated Square tubular and net steel frames with kiln-dried wood slats. ,/ Matching litter container, 2066, J Can also be specified with only one, two or three *eats. ,/ For wheelchair occessibility specify Model 2055. • I Checkerboard 2095 available for this table. 204 4 *••••••• MAY • Okkrr lb VELE-TE ewe ceiliir reg tAwooke okacE% • I... • r• . e SHEET NO. OF - ENTRANCO ENGINEERS, INC. JOB NO. ••■■••,....■•■1■ PROJECT -1-.., ,... e 4 ..v. - / 3 , CALCULATIONS FOR -13k.,_/_,_:r,,1 C„,. a „Ls' !Lai__ MADE BY 3vii P.) DATE 14175/Xi_ CHECKED av DATE OPP I • I , I • ! ; ; „ . .i!,;;; , • ' NA . L., 1, 4, ..4...4. , c., et C/4):', X): • ' ■ I Z• a le...*:‘,. *- ■ - . x . 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A ..-,._ .5. ..A. ez.,...., 0 c.. ,i,i1,0.... y.:: r, ,.), 7- i . .4d .z, ... a c...,;• , -'2... - i ,z-.4;.- .1 t•.......64- . 77 ;:?...„{ i 1-• : m. "Z.' - ' 4:4 Q / ,i;AL-. `-• it 5 .-- . . • i , • • ■ . . ,014., e... 0,:-. • • : • , B ' i.D .- • • ; . , /11 . ;L.:4 A 4-. .1 5 ... ,1', 0 (.... c......, ,.......„,..14..1.*. gt.• !!.-: . ...;r:.:4- Z... I ...r., i,. 42-:.5744;!cr...;,/ . I 1 . . i . . ) , 11, . C... P, C.- I. '. z. '-'3, ; 57 711 .01 %. :Awl 3 c. //Dr- f-, -71- . . .. I • . i ! : ..L' ,.4... T.+ ..,.. 1 er 4 • , . • :1. • ; . . . i I I : t-'6 • ' • of, t •■••■•■••••••••■•■•■••••••■ TOE ,f5. SAW( ANP - O vnl y17OT FAX #: S(02—1 -11 15 FROM: ��N �`;.. • DATE: 4, / 1 / PAGES IN t INCLUDING //'' THIS PAGE: FAX #: PHONE 11: ' 13I — 3%7O 5 CITY OF TUKWILA 6200 SOUTIICIiNTER 110U1.EVARU, TUIi (VILA, WASHINGTON 98188 April 1, 1991 Ms. Sally Anderson, P.L.A. Washington State Dept. of Transportation 15325 S.E. 30th Place Bellevue, WA 98007 PHONE 11 (206) 433.1800 Gary L. Vanl)asrn, Mayor RE: I- 405 /Southcenter Blvd. Interchange landscape Dear Ms. Anderson: Attached is the conceptual landscape plan which we discussed by phone on March 18, 1991. This reflects the comments of the Department of Community Development (DCD) staff and issues which we would like to see addressed in this project. The plan includes the following elements: a) A minimum 100' natural shoreline buffer zone, extended to the on /off ramp and the drainage swale along Interurban. Due to the fact that this is a shorelines area, and that all existing shorelines trees apparently will be removed, DCD will require some large replacement trees for the Shorelines Permit. Trees within the 100' shorelines buffer area should be a minimum of 2 -1/2" caliper for deciduous or 8' -10' for evergreen, spaced a maximum of 50' on center. b) Retention of existing trees wherever feasible. According to DOT's grading plan, no grading will occur on the east side of Interurban or the east side of Monster Road. Existing trees on the west edge of Interurban near the bridge (at the proposed drainage swale) will apparently not be affected by any grading. Please let me know if this is not an accurate reflection of the project grading limits. c) A provision for future development of a community "gateway." At some future date, the City would like to develop a gateway concept for the Southcenter Blvd. /Interurban intersection. The gateway would include larger street trees and possibly a sign /sculpture. We envision a stand of poplars, in a single or double row; however, the actual design would need to be reviewed by the landscape architect, DOT and other Tukwila departments. Ms. Sally Anderson, WSDOT I- 405 /Southcenter Blvd. Landscape, 4/1/91 Page 2 The attached plan reflects DCD's suggestions for this gateway development. It is understood that the current I -405 project does not include larger street trees or irrigation, but that some minor revisions could be made in grading and planting beds. c) For the Southcenter Blvd. /Interurban intersection area, DCD would like to see the following incorporated into the current project: • Areas of open grass around the intersection. We understand that this area would have low maintenance plantings and could not be irrigated. • A 20' -30' wide grass "bench" to provide a level area for future street tree planting; • Special shrub or tree plantings as a backdrop to future street tree plantings. This could be accomplished by using one type of tree from the DOT plant list as an accent, or using one of the more colorful shrubs, etc. The intent of these recommendations is to provide guidance for final permit drawings which will meet Shorelines and the Board of Architectural Review's (BAR) design review requirements, but which will also be consistent with DOT's I -405 program and the project budget. After submittal, the applications for Design Review and Shorelines will be reviewed concurrently. A complete design review application should be submitted at least 60 days in advance of the desired BAR hearing date. Shorelines review requires a minimum of 90 -120 days. When you have had a chance to review the plan, please call me for further discussion. Your comments and /or suggestions are appreciated. Sincerely, Ann Siegenthaler Assistant Planner cc: Brian Shelton SR 181 /Green River Interchange Modification SR 405 OL -0755 .� 15 Cal or 11-1/4-6 t 56b Ue / 3 t 0 ?-6Po -r: C*TeS N0 ICE N 5 kt,DN C, fin► k of Cie egm 1 3& Biology /Wetland Report by William S. Null and Mary Ossinger Biologists RECEIVED MAY 2 9 1992 TUKWiLA PUBLIC WORKS Washington State Department of Transportation Environmental Section January, 1992 2 SR 181 /Green River Interchange Modification SR 405 OL -0755 Biology /Wetland Report PROPOSED PROJECT This report identifies the biological resources and possible impacts of the proposed SR 405 /SR 181 Interchange modification. The project is located in the city of Tukwila, King County, Township 23 N., Range 4 E., W.M., Sections 23 & 24 (Figure 1). It will involve two realignments; one of the southbound SR 405 interchange to intersect SR 181 at Fort Dent Park Road, and the other a realignment of Southcenter Boulevard to connect with Grady Way. Each of the proposed alignments will require a bridge over the Green River. Additionally, an overpass will be needed to route the new SR 405 ramps over Southcenter Boulevard, and a new intersection will be constructed at the juncture of Southcenter Boulevard with SR 181 (Interurban Ave /West Valley Highway). A bike path is proposed to be built along the old Southcenter Boulevard alignment, and the present SR 405 southbound interchange ramps will be removed. SETTING The project vicinity is in the Green River valley, less than five miles east of Puget Sound. This area is part of the Puget Sound Basin which is relatively level, and underlain by glacial deposits. The soils occurring in this nearly level river valley belong to the Orida - Seattle - Woodinville association, and are somewhat poorly to very poorly drained (Snyder, Gale, and Pringle, 1973). The proposed project is on land with elevations mostly less than 50 feet above sea level. Water resources adjacent to the project include the Green River and two small intermittent creeks (unnamed tributaries) within the boundaries of the project. The Green River is tidally influenced, and flows into the Duwamish River which, in turn, empties into Elliott Bay about ten miles northwest of the project. A Figure 1._ Project Vicinity Map . ..e.-.1 ti•iril... :''.?•,7•71:•:), 4k.7:ri-741-:Vi3.;* • -,..i: •••.•!7:1-•.-1=-:."-,•:: .7`..-x••::::•,....,__- • i. +.1 •-■ . ../ - • ' I - .; ,.1••■• , , . -44..f.;•*`4- '"'"—*-...,-.. -,..Q•••,•';':.; ,i-•.:-.4.4::t5;..:GOL.,6.1.•::::,;.-.4.-.teii:.: i. .. , . •-•4 •:....:(1.. 4,4.14 OTH BL RIV 3 \ -c! - 1.(Z121.4. • • ,. Y..s..;. --.-..,::N .:,.. .414- •et.. ..:.k1.....--• --7•-•.?.-F..v:2.1:7 er..,. 4f' '....A.T.t.i...... .. .. ''''• 143R d'ist:;..1.,,S7-71,:,-;::. fiLiNGTO ..,.....1,.. _, . ;74-..-...,-...v.r.• ..•,....:':•'...1.--/.:..2:...:-:::-.-.... ,..., f. :------;,_--.L.----...-..--•:.:-.,...,..,......--_74,-,.,••••••• .. .,;:••••• •- • . ......:.. . -........ ...t. ..J-..N., c..t ,-•',,,;*z.',7,-757.,,fr:zig,',;,..77::--,•'—' - ...::'.G0...l,!2• ;C: P. LIR...S. . t , :..-- ?::- • Er on cz,c: A.th72.' ENS EN The region is part of the greater Seattle metropolitan corridor and has been drastically altered by development. Fill has been deposited on much of the original land surface. The Green River .channel has been dredged and its banks diked and armored with rip -rap in places. The Howard Hanson Dam, about 40 miles upstream, provides some flood control. Primary land use is commercial, with some greenbelt along the Green River, and residential areas nearby. The project vicinity is not classified by King County as a Sensitive Area (King County. 1987) . VEGETATION Pre - settlement Conditions -- In the absence of natural or'man- made disturbance, the land surrounding the project would support a northwest lowland forest characterized by western hemlock (Tsuga heterophylla), Douglas fir (Pseudotsuga menziesii), salal (Gaultheria shallon), oceanspray (Holodiscus discolor), and sword fern (Polystichum munitum), (Franklin and Dyrness, 1973). The riparian zone along the banks of the Green River would likely support black cottonwood (Populus balsamifera), red alder (Alnus rubra), bigleaf maple (Acer macrophyllum), and western red cedar (Thuja plicate). Existing Conditions -- The project vicinity has been disturbed by human activities associated with homesteading, road - building, and flood control. The immediate area is bisected by the Green River which has steep banks of about 20 vertical feet on both sides. Currently, the vegetation is characterized by a mixture of second - growth native and exotic species. It can be divided into 4 general communities; disturbed field and upper river bank, lower river bank, riparian forest, and roadside depression. These areas are described below. A) Disturbed Field and Upper River Bank. The relatively flat upland bordering the south end of the river's east bank (near the existing SR 405 bridge) is dominated by grasses and weedy species including common tansy (Tanacetum vulgare), ox -eye daisy (Chrysanthemum leucanthemum), fireweed (Epilobium angustifolium), red clover (Trifolium pratense), mullein (Verbascum thapsus), pineapple -weed (Matricaria matricarioides), horsetail (Equisetum sp.), Canada thistle (Cirsium arvense), and Scot's broom (Cytisis scoparius). At the top of the river bank, the herbaceous vegetation is bordered by Himalayan blackberry (Rubus discolor), hedge bindweed (Convolvulus sepium), teasel (Dipsacus sylvestris), and climbing nightshade (Solanum dulcamara) which extend about halfway down the bank. Similar vegetation is also found near Interurban Avenue above the river's west bank. B) Lower River Bank. The thicket of blackberry and morning glory begins to give way to reed canarygrass (Phalaris arundinacea) on the lower river banks. The reed canarygrass dominates to the edge of the ordinary high water mark. The slope below the ordinary high water mark is mostly unvegetated. C) Riparian Forest. The southern portion of the west river bank (near the existing SR 405 bridge) supports a riparian community dominated by bigleaf maple, hazelnut (Corylus cornuta), Oregon ash (Fraxinus latifolia), willow (Salix spp.), and red alder. One bigleaf maple has a diameter of more than 2 feet. The understory is characterized by reed canarygrass, nightshade, snowberry (Symphoricarpos albus), Himalayan blackberry, and thistle. Most of the native forest vegetation has been removed from the project vicinity, so this riparian community provides.important ecosystem diversity and wildlife habitat. In general, riparian communities supply several crucial functions which include: slope stabilization; removal of pollutants and sediments from runoff; migration corridors for wildlife; and providing shade, detritus, and invertebrates to the river, thereby improving fish habitat. A small (one acre) forested site between the east river bank and Interurban Avenue appears to be a relict from an abandoned homesite. Several of the trees have been planted, such as horsechestnut (Aesculus hippocastanum), box elder (Acer negundo), maple (Acer sp.), and black locust (Robinia pseudoacacia). Some trees common in riparian communities are also present, including black cottonwood, bigleaf maple, and Oregon ash. The understory is composed of Indian plum (Oemleria cerasiformis), snowberry, English ivy (Hedera helix), climbing nightshade, and stinging nettle (Urtica dioica). Although this site is not strictly a riparian forest, it contains some riparian elements and serves the same functions as discussed in the preceding paragraph. This similitude is especially important when considering the fact that most of the natural riparian vegetation in the area has been lost. Also, several of the trees in this tract have diameters between 2 and 3 feet, making them particularly valuable as potential wildlife habitat, and possibly as raptor perch trees. D) Roadside Depression. A small depression lies along Interurban Avenue near SR 405. This grassy, disturbed spot with a few small trees serves to filter stormwater runoff from the adjacent roadways. l'"-I/Wri40426 ger " The Natural Heritage Data System, Washington Department of Natural Resources, has no record of endangered or threatened plants or ecosystems of statewide significance in the vicinity of the proposed project. Impacts -- All the vegetation communities listed above, except the lower river banks, will be impacted by the proposed project. New construction and clearing will remove approximately 0.78 acres of disturbed field vegetation and approximately 0.28 acres of forest overstory. Removal of forest overstory is of particular concern because of the habitat and other environmental amelioration it provides. In addition, some vegetation not cleared will be adversely affected by shading from the new bridges and overpasses. To mitigate the impacts to vegetation and wildlife habitat, woody plants should be planted in areas newly daylighted by removal of the existing SR 405 ramps. WETLANDS and WET AREAS . Existing Conditions -- Wetlands are unique ecological systems that are transitional between upland and aquatic environments. They are defined as those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that'under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wet areas are nonjurisdictional wetlands such as drainage ditches, and open bodies of water. which fail to meet the three criteria of jurisdictional wetlands set forth in the wetlands manual (Federal Interagency Committee, 1989). Lakes, ponds, sloughs, and streams, however, are considered special aquatic sites and fall under waters of the United States. Under this category, they are subject to Section 404 of the Federal Clean Water Act (Cowardin et al., 1979 and Huffman et al., 1979) and must be treated accordingly. The only wet area within the project vicinity is the Green River channel, and since it is always covered by flowing water, it is classified as Riverine Tidal Unconsolidated Bottom (cobble /gravel). This area also meets the wetland criteria in Presidential Executive Order 11990, "Protection of Wetlands ", Governor's Executive Order EO 89 -10, "Protection of Wetlands ", and WSDOT Directive D 22 -27 (HR). Impacts -- If the bridge footings are installed upslope of the river channel, as proposed, the only wet area impacts will be from shading by the two new bridges. Shading of these small and relatively low quality wet areas will have less overall impact, however, than the removal of the adjacent riparian forest. 6 7 WILDLIFE Existing Conditions -- Animals likely to use the available habitat in the vicinity of the project for breeding and primary use include beavers, muskrats, river otters, raccoons, rabbits, swallows, song sparrows, amphibians, and other species common in riparian areas. Also, species common in suburban environments are expected to occur. Habitat near the project includes riparian forest, shrub thicket, and disturbed field. These areas may include entire home ranges for small mammals and birds, and parts of home ranges for larger animals. Riparian habitats are particularly valuable because of the large number of species that use the open water of the river, along with nearby habitat, for all or part of their lives. Also, the large trees in the homesite area may provide raptor perches, especially during winter. The Washington Department of Wildlife, Nongame Program, has reported the occurrence of great blue herons (Ardea herodias) in the area. Also occurring in the area, and reported by the U.S. Fish and Wildlife Service, are wintering bald eagles (Haliaeetus leucocephalus). Impacts -- Reductions in wildlife populations are expected in proportion to the amount of habitat lost from clearing for highway construction. Clearing 1.06 acres of vegetation will reduce available wildlife habitat for native birds, mammals, and amphibians. This reduction of habitat is recognized as a consequence of the project. There may also be secondary impacts to wildlife from habitat lost due to increased noise and traffic from highway operations. No. animal population, however, is expected to be significantly reduced due to this project. Possible impacts to the great blue herons and bald eagles occurring in the vicinity of this project will be assessed in a subsequent study and reported thereafter. FISH Existing Conditions -- The Green River in the vicinity of the project serves as transportation and rearing habitat for coho, chum, and Chinook salmon, as well as for several anadromous game fish including steelhead, sea -run cutthroat trout, and dolly varden trout (Williams•et al., 1975). The river bottom in the project vicinity consists of heavy silt and mud, with no apparent spawning riffles, so it is unlikely that salmonids • use it for spawning habitat. Impacts -- Fish habitat in the river will be affected by clearing along the river banks, especially from the removal of riparian vegetation. overhanging trees and shrubs provide 8 hiding cover and shade, plus a source. of insects and detritus important to the fish food chain. Although shading produced by the bridges will further reduce streamside vegetation, it will also have a positive impact by reducing heat input to the water. Fish mortality may occur and water quality may be adversely affected due to increased silt loads in river during construction. The two new bridges, along with higher levels of traffic during the life of the improved highway, may increase the volume of surface runoff which could adversely affect the water quality of the Green River. Impacts to fish can be minimized by coordinating construction plans with the Washington Departments of Fisheries and Wildlife and interested tribes. • CONCLUSION There are no jurisdictional wetlands, other than the Green River, within the project area. REFERENCES Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish and Wildlife Service. FWS /OBS 79/31. Federal Interagency Committee for Wetland Delineation. 1989. Federal manual for identifying and delineating jurisdictional wetlands. U.S. Army Corps of Engineers, U.S. Environmental Protection Agency, U.S. Fish and Wildlife Service, and U.S.D.A. Soil Conservation Service, Washington, D.C. Cooperative technical publication. 76 pp. Franklin, J.T. and C.T. Dyrness. 1973. Natural vegetation of Oregon and Washington. U.S.D.A. For. Serv. Gen. Tech. Rep. PNW -8. Governor of the State of Washington. 1989. Executive Orders EO 89 -10 and EO 90 -04, "Protection of Wetlands ". December 11, 1989, Olympia, Washington. Huffman, R.T.; D.R. Sanders, W.B. Parker, and S.W. Forsythe. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y -87 -1. Department of Army. King County. 1987. Sensitive Areas Map Folio, King County, Washington. Parks, Planning and Resource Department, Seattle, Wash. • President of the United States. 1977. Presidential Executive Order 11990, "Protection of Wetlands ". Federal Register, Vol. 42, No. 101 of May 25, 1977. Snyder, Dale E., Philip S. Gale, and Russell F. Pringle. 1973. Soil Survey of King County Area, Washington. USDA Soil Conservation Service, in Cooperation with Washington Agricultural Experiment Station. Washington State Department of Transportation. 1979. Directives D 22 -27 and D 31 -12 (HR), "Protection of Wetlands ". WSDOT, Olympia, Wash. Williams, R.W.., R.M. Laramie, and J.J. Ames. 1975. A catalog of Washington streams and salmon utilization, Vol. 1, Puget Sound Region. Washington Department of Fisheries, Olympia, Wash. C :3 " +*v:iLtlsrx...t «. .-..—.._...-....... v.... .uu..«..er.�s..r,.rn•4.r...i..v wrau. vwai ,u�rm++wm• +ue�.w.u•.a;.cnVt•Al\ 714 . ".011,VAILVV4rhri:..J:tR:Y.^s ,, rozw.es.u..��.. 08 /JAN /92 MEMORANDUM From: William S. Null To: Subject: Recommendations to the Biology /Wetland Report for SR 405 - SR 181 /Green River Interchange Modification 1) Clearing of trees should be minimized. Unavoidable clearing should. be mitigated by planting suitable native trees along unforested sections of the river bank within or near the project area. A planting replacement of greater than 1:1 will help to compensate for the time lag between planting and maturity of the new trees. 2) Bridge construction should be performed to standards. that will maintain the river's integrity. 3) Appropriate erosion- control and water quality protection measures should be employed during project construction. 4) The two new bridges should be equipped with catch basins capable of preventing highway runoff and hazardous spills from entering the river. 5) New alignments on land should be edged by biofiltration swales to minimize pollutant runoff into the river. JOHN SPELLMAN Governor STATE OF WASHINGTON DEPARTMENT OF TRANSPORTATION Highway Administration Building • Olympia, Washington 98504 • (206) 753 -6005 July 18, 1983 Mr. Byron G. Sneva Public Works Director 6200 Southcenter Boulevard Tukwila, WA 98188 Re: City of Tukwila Southcenter Boulevard 62nd Avenue to Grady Way M- 1147(5) Dear Mr. Sneva: DUANE BERENTSON Secretary The Environmental Assessment for this project was adopted by the Federal Highway Administration as a Finding of No- Significant Impact (FONSI) on July 14, 1983. We have attached the original FONSI. By copy of this letter, we are forwarding the FONSI to the following agencies: NEPA Coordinator Washington State Department of Ecology Mail Stop PV -11 Olympia, WA 98504 Mr. Nick Turnbull Planning and Community Affairs 400 Capitol Center Building Olympia, WA 98504 This will complete the NEPA process. The project may now SAM:le LAB (EN) Attachments cc: B. D. Draeger J. A. Klasell Department of Ecology Planning and Community Affairs proceed. Sincerely, lA. /144-4t-L-- S. A. M00N, P. E. Location - Design Engineer <B4.3 FEDERAL HIGHWAY ADMINISTRATION FINDING OF NO SIGNIFICANT IMPACT FOR SOUTHCENTER BOULEVARD CITY OF TUKWILA The FHWA has determined that this project will not have any significant impact on the human environment. This finding of no significant impact is based on the attached environ- mental assessment which has been independently evaluated by the FHWA and determined to adequately and accurately discuss the environmental issues and impacts of the proposed project. It provides sufficient evidence and analysis for determining that an environmental impact statement is not required. The FHWA takes full responsibility for the accuracy, scope, and content of the attached environmental assessment. 77/4-/R3 o Responsible Offjicial Acting Chief, Engr. & Operation Title SHORELINE SUBST'w: TIAL DEVELOPMENT APPLICATION CITY OF TUKWILA DEPARTMENT OF COMMUNITY DEVELOPMENT 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431 -3680 RSTAFF USE ONLY< e Number. U Ct eipt Number. 1. BRIEFLY DESCRIBE YOUR PROPOSAL: lit WAs tts N k Tv u sriTE Deer. m S PoerA -rta AJ Pg0P0Se5 -ra CoN6TeVGT 4 6160 $T'PAcTVR ', 114.)ct.UDiNk : cotrrlice-KWUR. 8W D.% GFEEM eNe1L 6e{DC4t:J 6r-405 Sou'ttteoU■JD EAktPS deeew giV� $c1Pke AND rate Otrilt UA1D PS/ SotraarAarreR- BLVD. u y DelZ.CI •aSS 1 t•Ut . CSC sFTTAc, 7� *Ade l 2. PROJECT LOCATION: (Give street address or, if vacant, indicate lot(s), block, and sub- division; or tax lot number, access street, and nearest intersection) 5e, sloe. M U-e PoST o. S i ID M Lt.E POST 0.96 4P503 tuVeL "VNTelUst1t404E- Quarter: Section: 2 4- Township: 2 3 N Range: 4 E (This information may be found on your tax statement) 3. APPLICANT:* Name: ca F 1 UK.w i t.A Pdau c w o e. Address: C 3 °o soOhc. lria- a(-11 . -ry Ku.) uA) w A 07(31(042, Pho e• Betel 'tEL-ran.) 433 -ot-79 Signature: Date: * The applicant is the person whom the staff will contact regarding the application, and to whom all notices and reports shall be sent, unless otherwise stipulated by applicant. AFFIDAVIT OF OWNERSHIP 4. PROPERTY Name: WM H t N 6-T D N SrxT>r bapA RA-A4 JT- 9F -rpm S Pd R-T1/4,7 o re. OWNER Address: 15700 D A I T ' D O M E . tJ. 5vserr(E t WA gB43`. - %7 10 Phone: co UC" ?-051K) tH°a 5a-l_ 44-0- *5 3 t'o M 5 - t 38 I/WE,[signature(s)] swear that I /we are the owner(s) . contract purchaser(s) of the property involved in this application and that the foregoing statements and answers contained in this application are true and correct to the best of my /our knowledge and belief. Date: /1/47 /9"2- SP ORELINE SUBSTANTIAL.'4_VELOPMENT APPLICATION u 5. Present use of property: T.4k$PoerATon1 coa.vDw. Page 2 6. Total construction cost and fair market value of proposed project (include additional future developments contemplated but not included in this application): ,11/.0/ Doe>Oco 7. List the master program policies (use program sections or page numbers) which are applicable to this development: 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: 1ioop Co rret)L zpkrE Peti4Lr -- ctri OF TUK-W (L& 44 DR# & .I c Peta fir" APPeoJM_ -- obw ti NliTa'J Peer. OF c6 K62,4 c'S 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): Tve. Exar,' 4' &p /cc ij T `f /4N ,8 j- ,4zo, es 72- &5,<J iu f� 14)/7%9 /o jp °Ai P�7,' 40/4(4e-..5 ,4-r T• .G —A) 77.rL 1 4yit /ue %JD .1 -6'0SS 62/D 6E C,eossriocf5 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): A/ /A SHORELINE SUBSTANTIAL - IVELOPMENT APPLICATION ; Page 3 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): N�A 12. Give a brief narrative description of the general nature of the improvements and land use within one thousand (1,000) feet in all directions from the development site: £x�.s7 /4)6 hvo i& Aga P,eavE vrs I4 e." /few „Shoat-6140 L a..r s 1A40..y 5 /P TlkL` av44 E- R-c /Ai 1 )CI-uD/ ku 6 4&A DFFI GE. , FbiQ r b ENT Pam /5 toe4-1 "eD DF 7-#6 / e r, c-r 5/T E EXISTING CONDITIONS Cross-section 12.4t7 • Irr I TT . (tip 1 ee 11 1 It r r r r r r, F- L FE L r • CP EXISTING; CONDITIONS 4. Cross - suction 12.410 •C7 • • • 'f. r rrrT-r-n --1 %ri / • — = .fir �a . =1 =. =. = L L n qt:'' M C'`3 v•+ r-i i c�- EXISTING CONDITIONS Cross-section 12.407 Ltn . '141 r-- F+•-.1 7.-4 .1 i1 D 'p"1 C = B•� � r • 5 .t ti • It I r 1- tS M F I � oltri C 1 1 jfr Ily •, !, r�l • .io i F L .—•4 L L_ acti UU H = r ulLL• • • 7 u• • , NOr e,•r.., 62ND AI/4" — ST ti PARX .W ,., • in PARK— — ,.i 'STENSEN""R ss 33M 'S•A GL.CO. J moo- oP. WAY - � , - r i to •�jo, y . WC St nUl . . Ur,C • . fP •1 Od -- 1 \\,, r, ;.... -I. -;•-• 4r. ; : LONGACRES OR VIE S. W. E.5 t R iCE--- 'TRr4CK- - - -_ s 1 Y,,,i9N ;I = .)OCnCY ma LOCATION MAP WASHINGTON ARIZONA ENTRANCO CALWORNIA ENGINEERS • SOENTISTS • PLANNERS • SURVEYORS AL Wash' ngton State VI. Deportment of Transportation n ' SR 405 SR 18I/GREEN RIVER INTERCHANGE VICINITY MAP 2 . 1 r I 11Ma F \n N S 133rd l 1 + 5 1a01h St Lq3-Q0b4 S 144th Sr — N S 148th 5t S 156th St (2) N $ 152n0 St Tukwila Interchange Str■nder Blvd Codiga House (1919) ;2) Community Picnic Grounds tij Old Red Allentown Covered Bridge (190:3) Lewis Ferry Landing Baker Bled 3 Y� Foster Footbridge (1926) :: (i; Foster Tree 1 c) Foster Homestead Native American Village Site ,1 Interurban Electric Railroad (1902-1928) Black River Ferry Landing Mox La Push Longhouses & Village 1 Fort Dent (18561 "White Lake" Fukwila Station Black River Station Fred Nelsen Dairy Farm (1901) Renton unction Station :: Maple Grove Park (1908) 1 Shell Midden Archaeological Site 45K16 ames Nelsen House (1905) `') Homestead Barn (1887) Native American Camping Site h 11 izt 2 SOUTNCENTER PARKWAY /. \9GgQ. To Fort Dent Park BOULEVARD MONSTERc l ' o \� Y BR 0 100 200 300 Nominal Scale - Feet TH ENTRANCO Engineers t�t3-o0o4 City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way Figure 3 EXISTING ALIGNMENT E„A• ��� / r�^TUKWIIA ENTRANCO Er. rr.es sou?+t�E PARKWAY Realignment Of Existing Roadway New Bridge Structure Widen Existing Roadway _ Close Existing Roadway • • • Proposed Trail System Sidewalk/Bikeway O W 0 0 a City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way LA 3- 0004 To Fort Dent Park T — " Connection Point Of Proposed Trail With Existing Sidewalk /:,, To Fort Dent Park Connection Point Ot Proposed Trail With Existing Christensen Greenbelt Park �,o TAR / I 't Li eR Figure 4 PROPOSED ALTERNATE frame A• Z�g3 0 100 200 300 Nominal Seale - Feet NORTH ENTRANCO Ervr ....... 1-40s TUK WILA cy. 0 „ L>i PARKWAY LEGEND Mixed Deciduous Trees Mixed Grasses, Scattered Shrubs Landscaped Area Area Of Vegetation Loss Proposed Landscaping w City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way L93- ocoti To Fort Dent Park r-;n5rAf.A. //g3 5 Figure 4-A VEGETATION IN PROJECT AREA SR 405 SR 18I/GREEN RIVER INTERCHANGE pEK.4 ur 4 7(4 k r BS e6J BASIN [BOOUUNDDAARY Scale: 1 Inch = 200 Feet ti �60 3 2 =32 DRAINAGE AREA MAP 1 3 ft SHEET Of *SHEETS p Fi.�Ir�/c4 1. •i"r :P '• Q N, o • zi I/ . . // . e' •..,, 4� . : i /11,4 gZ� LOCATION OF SELECTED MODELED CROSS -SECTIONS GREEN RIVER BACKWATER STUDY L13-c F 61 SCALE NONE row, lT 4/14--A3 2 1 1 0 0 1 0 50 100 Feet Profile grade DRAINAGE SWALE SECTION (Looking North) Not to scale Lifs-000+ MATCH TO SHEET 2 OMNI STATEFED. AI 0 PAW. NO. DESIGNED BY ENTERED BY CHECKED BY PROJ. EWA. B. BERG, R. E. DIST. ACIN DATE DATE REVI SI ON BY 10 WASH WASHINGTON STATE DEPARTMENT OF TRANSPCRTAT ION AAAAAA GO 141300,11• MOM • 01,011111 SR 405 SR lei/GREEN RIVER INTERCHANGE DRAINAGE AREA PLAN P-terkit i-r- 47T4/4:3- .•— MR1114--=450--313•4-- 20 1110 MAINIAT 5 A 2,C4.5i001. UfDtT7Vr'47 . 5,T,, 0cOr •ro \ \ \ 5 3.• ROOT 030 COATI stc•pec.c. c no....ceact 1 \ cr. 1.30031 3 °"' GREEN RIVER -.24;.01.4..1.1,irr,.0 0033, 5,55*11 OCR \• - - \ SOUTHCENTER \BRIDGE STRUCTURE 0 AL-81 BRIDGE STRUCTURE POW 4 3 SC 133 SCALE IN FEET 5131I., WE VI:I '' TV. Sti 1.3.55:33•4 /-14(44.441. •414A 4.4 0041 LOOSE a.•44 /.Ir SO, G 1 d 2 III Or .00,s nil I 0-5 1 ''.;.•CC SiNrr'' M3'3.'5%3 O031301,C.00 111.00 •••TO ICE GC,ol 0 5,3(•./ 5,03, 0040.10TP,, III !MI 41.1,14s• (id,? 1.00SE 0.0.03G-/ PTO OCT., SCE S.Ett 0.5 0(001 LOOSL To OW. 3.01`517rsy 300 00•5 510i1i 1.00 00.0. 3CU.,. 00.. FED. AI D PRO.J. NO. STUMP COVER DETAIL A 444.S. FPI Sr -III 0.5 left (44 1cP 00.55 Ir. Oa. Lao. ricr,I •ID 1-••\0.4.. tio•lo0 /••••‘-‘ - LOOSE oe °•°*.° f••••',•/.••1/2' SIDE v,E.w or 33 (OM 3,030 LOG COVER DETAIL 8 e1se4 5)741> P151 Dill, 550(1 O'S I.C.0.33 31333 .1 riV fCItIV "."P SIC Sr•EFT 0.5 1*3E0 COMO.. ROOT WAD COVER DETAIL C DI VI Si ON OF HI GHwAYS r.01.U; 7•33 330 11 S100000( 0.50 •103 Anc ATErrOFD TO ec Lszo cs 1 arCE cr 43C3105111 330 C44047e11 ef rtf. 1(1.0 3S5.57.01 S.Lt uSiO •oog s..ao. EC 000 CFO Fr.° 3070C3E0 5, 0511.5(0. r.Colv. yea +V • •OC, C.. toOEOCCO 05)51CI0 kocc. P.M miry 47 -\:t0.E OF BAIA 41' PLAN v:Ect 55. 70 '-;V5.S1'0'1TIW‘L'INIIII ar0.3Irrr lr',5E 00-03, 33/3,3.1i3 DEADMAN ANCHOR DETAIL. D 10 0e4004.4 ANC KA CABLE ATTACHMENT DETAIL RECEIVED m:R 'L 21E93 DEVELOPNiENT r*..1 4.6 k•A'i'13,) .cy311.43.' '''''''' CTE4 E 6IT61 A NCO frIrlfrl - 3/303•1 rrigr- 'E.TE'O aty" 5. SHERROW T. ETHERINGTON,C _ _ I 0 WASH :NED BT 8. 8ERC. P.E. 'EO BT R. BELDEN QED BT J. NAN.+ERSHITN ENLR. 0. BERL. P.E. DATE MATCH TO SHEET Xi DATE 1 REvI:IL•N END OF PROJECT .8L LINE STA.113+69.000 P.O.T.= • SR,-,405 STA. 113+69.00 P.O.T. (70' LT.) N.P. 0.95 MATCH EXISTING' ." EGINNING 0F'PROJECT AL LINE--STA. I08+25.00 - P.O.T.= 1 SR --405 STA. 108+25.00 P.O.T. (66' LT.1 M.P. 0.85 MATCH EXISTING I i IQ IM.«;I 1 91i_—_- 1"kTATE FED.AID PROJ.NO. {� Washington Stele 11 Ve Department of Tronaportot I on L LGL� G'Y GF 7 .K US WEST PUGET POWirt SEATTI. E !Tr/ Li WASH. NATL. GA O TO IOD SCALE l FEET ENTRANCO - f.Y,,Th'C£RS • S JEhTTSTS • P:.ANNE.0 . SWRI/Er1'S SR 405 SR I8I/GP.EEN RIVER INTERCHANGE •ASH:NGT°: ARizoNA CALIFORNIA U•1 EXISTING UTILITIES r M.tT A/ (41 • •••.r.: MATCH EXISTING STA. 118+93.70 DESIGNED By ENTERED By 1 :NECKED BY EfROJ. ENCR. i DIST. ADR. e RERG. P.E. R. BELDEN J. RSMITH B. eERC. P.E. I DATE DATE I REyIS.ON :ey '0 r•TAT8 FE0.A1D PROJ.NC. WASH! 0201...... • "s. RATER TO SHEET XX ...4F291".... Wash! ngton State IVO Department of TrOnspOrtOtIon e ENTRANCO LE GE NiD err/ oF ruKvALA UWEST ( 77PUGET POWER ( 5?) SCITY GhT vIE:SH. NATL. GAS So SCALE In FEET wASKYICI! ARIZONA CALFORs DiGiNEERS • .5.7.EXT S • PLAVWCPS • SURJE70 SR 405 SR IffliCREEN RIVER INTERCHANGE EXISTING UTILITIES ....aa,r,IEJIasP.4-NMr- 9e12.1, A 1.1- 4 A4413 11. —1 ;, , cos; ;:.i. f;"1 riL—J1 — PE •11“ CENC.t.TE 1 3. xE1.1 •,,,0 5..1767 ======c2/,,, Cri C•,i; ?Z., ON r SECfl,,,,, ACED :NsTALLATII.A. SMOOTH COUPLING BAND FOR CONCRETE PIPE .E.TEeie, IA et 4514 4 36 • PI.ATE 636.0456000 .:TEP 340516AT10.4 AEA AST. A 623 633030 T••E NaE. •••-•/ 51,.ES 2. 1I ! ! 5,0:5 10.SE -. • I , .71. F ." r.=.,....:, . v . ,.--1 t ; • , 1! • 4.1...316E, -e--.------*-1)----(.-D-----(Th::..r---..._-,—./:--:T::"Th--r-i - !' 1 i I ,.,.. L--1-. , . . . ....., . r• _KI,cr.,•,...A5:- A -.,, C..,,,.:ZED .. : 1 • I .:-11-1 r „ 1 •,..„,,. • ,,d ..., un rc.i",,ICA1:t,1 rEe &Sin A :,.3 I I 1 171 . ;...)\.; • ., • • .....,s -/ A 510E ft.A11E.4 10 PLATE DETAIL ANCHOR ASSEMBLY - CONCRETE PPE CONCRETE PIPE COUPLING AND ANCHOR ASSEMBLY DETAIL A tit"' 60.,^6C 014383 PL.CE3 LT-1(ot) 15. J2. 4 5. czt. Kti-LE3 A .35001- SECTION A -A SECTION A -A RIPRAP PLACEMENT DETAIL Y.. ! ; . E 'F.0 BY J. HAWiRSM, TH 12 ! I 0500800 By R. BELDEN CHECKED BY 9. BERG. P. E. ENGR. B. BERG. P. E. ...:.. :1 tr.sT. 906. ; DATE DATE 1 RIPRAP PAD DETAIL ;J..; 5:: !<•,7 REVISION 180 c" ST Ald FED. AI G 00.0.1. NO. I -1-3 IITASFi [60.1m1.1 .6 *EP,ESSILIN e.10. a T 43844664 15 _ • • •a..r r K). ; • DRAINAGE SWALE PROFILES of,SSsyLEH OF GREEN RIVER ,7c 'h. . R7,-- X-5-.-: \ , • _\-! r-------- „eft:: ____, ..._,.. -....__ ,.:• , .7"... ' 1 1 f--- 67 DRAINAGE SWALE SECTION SOUTH OF GREEN RIVER rw,,a CET,6, C.• 6.: iD I w),ES 14S ,EET SHOULDER DRAW aETAILICATCHBA5M EN TR ANCO WASHINGTON STATE "7/ DEPARTMENT OF TRANSPORTATION -1 • ,:t(v.:!..0 RIPRAP AT SCB/GREEN RIVER & AL-BL/GREEN RIVER BRIDGES rfP4lrlAt SR 405 SR 181/GREEN RIVER INTERCHANGE q-03. DRAINAGE DETAILS 125 RBAN GIN (ITCH INT 125+05-151"'R ELEV. 34.06 a,8 Y! J ECOLOGY DITCH SLOPE =-0.847. EE DETAIL MS -SHEET N1YCI (10tc.,EG(IC . - ID • r 6n.•a B*C•ClLL !0R DRAIN It. IMCP0A(IN P16C N0.CS AS SND•N Pin BEDO. ECOLOGY DITCH DETAIL IA 5- OCX) DES!GNED 8Y ENTERED BY CHECKED BY PROJ. ENGR. 8. BERG. P. E. Kew ISTAT0 I0 WASH -CO bl00111 DI ST. ADM. DATE DATE REVISION BY FED. AI D PROJ. N0. cao6. 01181 n,o., - SEE 661011 '61 SMEI TI 8+16 (48' LT.) FACE OF WALL TOP ELEV. 32.0 12" ST S Tj , r� ---i ` rj TI 7+51 (48' LT. FACE OF WALL TOP ELEV. 32.0 TI 8+18 (28' LT.) FACE' OF WALL TOP ELEV._280 _. / / L gY I 13 Li) N ' N 16• .6' i9• 5' (• 5' =T ♦'Ir 6) 1 SECTION A -A (TI STA. 7+75) R7.i. ENTR A NCO • Ytn9i • R..t•[ • M.MO' •AY✓.,C+ WCw [Arcata Allik �/WASHINGTON STATE ;gip DEPARTMENT OF TRANSPORTATION 4 I TI 8 15 (7' LT.) FAC= OF WALL TOP ELEV. 24.0 TI 7+41 (7' LT FACE OF WALL TOP ELEV. 24.1 -4A SR 405 D- SR 18I/GREEN RIVER INTERCHANGE ECOLOGY DITCH DETAILS s.11 Lq3-oc,9} :.E:IGNED BY J. HOMARD I 'TERED BT u. vtLER UNITS OF INTERCHANGE - GRADING ASPHALT TRAI-REFER TO CIVI DIMS. SHRUB BED 198 - Y.A. TREE PL AN71NC ON A SLOPE 1TTP.1 NOTE:REFER TO SHEET L-4 FOR PLANT SCHED.NOTES. ABBREVIATIONS & LEGEND "`.o IIISTATEI FED.AID PROJ.NO. 10 'WASH .,ECU ED BT C. nOUC.-BECK 1 •+ � J. Et1GR. 8. BERG. P.E. I .1ST. ADu. i DATE DATE REv1510N 'Pt LAIOTS OF TRAI GRADwG PATCH 5.980 S.F. - E.C.H. ARE TO BE REVISED BT ENTRANCO -I 770 S.F. - E.C.H. 4.300 S.F. - rJL 2.530 S.F. - E.C.H. TREE PLANING DETAI ITTPJ LIMITS OF Al GRADING SHRUB BED 759 - C.S. RP RAP - REFER TO CIVI DRNL. SHRUB BED 534 - G.S. Sr .uB BED 232 - Y.A. 4.100 SF - W.H. 345 S.F. - E.CJL 260 S.F. - E.CJI. 411111k Washington State II/ Department of Transportation WEST SIDE OF GREEN RIVER EAST SIDE OF GREEN RIVER CONFER TREE PLANING ITYPJ TREE & SHRUB it 15.900 S.F. - E.C.H. a - A.A•. 28 - PJA. N -F 28-TP. 18 - S.A. 147 - R.R. 18 - P.T. 147 - R.T. IB - A.C. NT - C.S. 8 - A.A. I47 - S.T. ID - C.C. 147 - Y.C. 2.530 S.F. - E.CJL 0 50 100 SCALE IN FEET HOUGH BECK & BAIRE LANDSCAPE ARCHITECTURE PLANNING & URBAN DE51GN 1000 LENORA. SUITE 56 SEATTLE. RA5141470N 980 12061692-3051 IASHINCTI APo20NA ENTRANCO GALIFORrA ENGINEERS •SCIENTISTS • PLANNERS• SURVETC F SR 405 SR 0/GREEN RIVER INTERCHANGE LANDSCAPE PLAN VW ::N: 110 E P: SEA: FR • • J`J•�1 T 1'li ..II 11;-11=11! ttlt D r ..4 P `T=ELL • CG4>ACTESc ✓ Ru 0S1t':CE E, /�•P C•.A J1EP FOUP 1411.4000 Li IN51 At b00 RGCO 0D5• ' PER 4: RS. I!IiTR;::r..._. ' CO'::PETS Pt'.•I N„ Az+n<a TRAr_- __ { u:I: DRnGS. // SEALER \RADDS \ I \\ �FeFSH GRACE • cR:E "7— 9—"ASE [CORSE" iv:EICHTS;5/9; 1 its •1111=11I 1141111 III=11f� I?' 0•<E RACK SU0P0R7 POST 6 FDOTIr1L SHALL BE INSTALLED PRIGR TO COI::. PAVING _P__.•.. u!Pd _R:ELEC 105 TAPE SECURE n/ CAP:. •5 WOGD SCRE'*S-Retn.:• HEAD ino I2I PEP S:DE IT1P.' —E r 5 PO5T5 EASE L EDGES j 1• L0. GALV. 51L. F'•0t 4' Al 1 � i' /^—S: e' CIA. N.B. n/ I.0T F MA10ER I11 CO::!:TERSeN. • 1 , o5CE,PEEN EN0 OF E0::,7TF. • 47. REB<R 414b1:R 1 + +•r :AE. GAL'V. n'r.C.E. AELD PL. nR01"✓EK.-.E FOR HASr. ---xtEAtrr D131, GAL,. ..AV- tS .."PROCEO 87 ENO NEER ::.6-. v. STL. PPE. WELD 70 h ATE ASPH<LT IRA:, -REFER 7C: Mr. OR0CS. =1 I i=iI i= =;t1 1 call • =1i1\. \ • • • }� 1— :iuP4C1 SUBGRALE r 00T:Ne. 1 C. E00E 4.7ST BE a F-01/ l*,t• :•J r1EN BE S nEEN TRAIL 6 CON:.. ERJJU F^:.5rt v,.+. 10? UE CC:::..SCOFF 10 DRm.•:. `- �CDU;nEp PC:t F..Ert GRADE OE IRA:. 5' D:A CD0.C. F001e1C FIVEiy F001IN:5 PER BENCH R t.tC`•'E:.°L_ BOLLARD !.J1 1O 34 ALE nO*15D RE4n:E<ELE BOLLORD,:0!::. F00Tc:e S•.HL 5E INSTALLED FP:OR TO 150HtL7 440100. 400D TO Er. PRE55t:RE 1REA TED 1•EL•. rR. ST RUCTURAL GRADE OR EST TER. 5 CC400CT SUBCR<DE 5/5'I-1 CRu0nED ROCr: I/: R. _- 1r.':0 _•t DEL •5' FI•'0H I/O' nr.11. A :'- HE. 5A,0u' JE,N7 M•t:41. :Win:. C!: PLAN —MELDED M'RE F<SPI: Ii.'. is 10/10! CO. SANDBLAST F1:•:IS1-I CONCRETE PAVING NOT 70 SCALE —1,4•1; 0' Olt, NEOPRENE SPACERS --CONTIN:IOUS 2'r i MOM FACER SECURE END FACER BOARD 70 BEN:n •Gv 7'*DOD SCREWS �- if-01•x ?'s WOOD SLATS n' R2Ir: / NEOPRENE SPACERS — v2 1HREADEO 4ET AL ROD-C1401ER0V.: 1E4NUTS 6 MASHERS 6 F'LL n/ M'030 PLUGS -- CON11'IJO'JS 3'. C•n005 FA5E77- ;A:7ER.. CORNERS. EASE EDGES ONE CUARTER :va INCH ;,e• Piz. x 4• 1. AG BUT n/ nASHEF- CCUNTERSr•.n 6 E0L n/ n00C PLu05 MU FR.3.4 1 fi �L Y P �� iY 7'A 87 qP i t �� I.-+. R.I %'•' \ j lid ''� / 1 /� 3: 5• ..1. n/ 1 \ " '-'•DI .%•-� /` Ji. SC E" "r�E D z. 6000 P1U05 —,— G' II I(`(% 11, ticN:.PC'/V:G .1 L I,!-,. I•..I `— , .I.F.11-1 - 1 8 ELEVATION ll=. 1. r 2, 1/'•01A. At14, C•P BOLTS -EA TEND uM. !-G•II - l - ��'• 1 HELVE I121 NC IE5 Rae COr::.FORTING I i'' - •4 RESAR-F0JI• 1410:C1r CLEAR ALL SIDES -i Pl... METAL HAROnt'nE TO C• 'Ta`^'t� En 1 CHUSHEb . C[F BE n0T DIPPED GA:war?E_D, -1 L-p , BENCH 6 CONC. 7007e:LS SHAG; :o _ 'Illra'COUP<CT SUBGRACE BE It15T4LLE0 FRIO0 TO CCU:. P4VINC, All n030 10 BE CEDAR - SECTION CLEAR D OR BETTER GRADE. LIGIITLT SAND ALL WOOD 70 SMOOTH FV:ISH BENCH ROT TO SCALE SITE ruPrATu0E POST — CCN:PETS Ptv:N7 1 DE CCu01E1EO • 1D .AsOHALT 74•;� V:51 Af tT:CN ',20 SHARP. CLFC!: 5 STRAI:,T JJ.n1 EETn• N 001/.RA':I!.0 L ASRnALT TRA:L- '•.SEALED-COLCP 70 HATCH CC5:': 10P t L: .:T. SEALER TO 5E FLUSH TO TOP OF CONC. PAvu1G. 3/8' :PONCE RUSOER JCV17 F(L H_ /rCONTerJ0u5 FULL DEA.TH OF CD,C. / ALL SIDES OF PO.7. 47'ICOn:ti1E PA,..: / I =III / i' =III=11 1 III= 11-III= !I, EXP4NS1ON JOINT NOT 1C SCALE HOUGH BECK & BAIIID LANDSCAPE ARCHITECTURE PLANNING S URBAN 0E51Lt: Ono LEt1GRA. SLATE S.6 37 At ILE.•ASHt.GT0H 9612' 1236ICA2-3051 ENTRANCO tASHNGTON ARIZONA CALIFORNIA ENGINEERS • SCIENTISTS • PLANNERS • SURvE0ORS u, u::LER ,` . ISTATE ' 10 (WASH C.HDU-H-BE Et. e. EERG.P , a .r. FED.AID PR0J.N0. W05nIn010n State WiDepartment of Transportation SR 405 SR 18I/GREEN RIVER INTERCHANGE L-7 0/09020 L•7.OW0 101d102 PICNIC TABLE POST Fo0TNG SWILL BE INSTALLED PRIOR TO CONC. PAVING INSTALL PICNIC TABLE PER � �urRS. INSTRUCTIONS / h \ 3/5" E J. w/ JT. SEALER / L-7 %--\ CONCRETE PAv.NG L-7 OPICNIC TABLE 30' NOT TO SCALE ECUAL DISTANCE TO EDGE OF ASPHALT PAVING 5/6" (-) CRUSHED ROCK C.uPACTED SUBORADE Jil t" CHAUFER FOUR (4) SIDES 4'-A• 0 C. BOLLARD { 2 _t 4-`L- 12" 5 1/4' \4• 2s' =11 16 ,II an 1 A• SPACING (rep.) RR MIN fi- 1r S0 REFLECTIVE TAPE SECURE w/ GAIv le W000 SCREwS-ROUND HEAD Two (2) PER SIDE (TYP.) 8"X 8" POSTS EASE ALL EDGES ONE QUARTER (1/A) INCH 3" ID. GALv. STL PIPE 5/8" 01A M.B. W/ NUT & WASHER IN COUNTERSUNK HOLE. PEEN END OF BOLT, TYP. 11 T1�111IT4=I II 12" BIKE RACK NOT TO SCALE STL PIT. 1/ex 2'X 6 CALV. HINGE. WELD PL PROVIDE HOLE FOR HASP. HEW,' DUTY GALV. HASP AS APPROVED BY ENGINEER a• I.D. GALV. STL PIPE, WELD TO PLATE ASPHALT TRAIL -REFER TO CIVIL DRWGS. FINISH GRADE OF TRAIL 8• DIA CONC. FOOTING 1 FIVE(5) FOOTINGS PER BENCH •, REMOVEABLE BOLLARD/CONC. FOOTING SHALL BE INSTALLED PRIOR TO ASPHALT PAVING. WOOD TO DE PRESSURE TREATED HEY/FOR. STRUCTURAL GRADE OR BETTER. COMPACT SUBGRADE CONC. FOOTING. TOP EDGE MUST BE CLEAN/ EVEN BETWEEN TRAIL & CONC.. BROOM FINISH TOP OF CONC., SLOPE TO DRAIN. "CRUSHED ROCK REMOVEABLE BOLLARD NOT TO SCALE Soo COS 1'-6' _ 6• �-- -� 1 30 x:STALL BIKE RACK POST PER MFRS. INSTRUCTIONS. CONCRETE PAVING E 3/0' E.J. 'w/ JT. SEALER . 3 , F1IS, GRACE r II 1I •,-111 .I • • (=III • -plan • .III •11_=_1:: =IIIIIE 1/4 4, EP_L - TRAIL- SEE 00,E CRAGS. CONCRETE FOOTING RE6AR ANCHOR -DRILL HOLE AS RECU:RED COMPACT SU?GRACE 5/8' (-) CRUSHED ROCK BIKE RACK SUPPORT POST & FOOTING SHALL BE INSTALLED PRIOR TO CONC. PAVING 6" T \ .Xli` —III_ilE ET-1II—!I�Il�lt 1 i l=: I =i l =1' -1 U=:' d I 1"T MIN --1N15H GRADE SANDBLAST FINISH OCONCRETE PAVING NOT TO SCALE ME0'CV SAN03_AST "':SH r— 1/G WICE X 3/C .E? SAwCUT ;GAIT WHERE S-C'• 3 ON ?1.\ /CX 2" DIA. NEOPRENE SPACERS CONTINUOUS 2"x 6' WOOD FACER - SECURE END FACER BOARD TO BENCH W/ 16x 3" W000 SCREED'S (10) 2'X 3's 'WOOD SLATS w/ 1/C NEOPRENE SPACERS 1/2" THREADED META: ROD -COUNTERSINK HEXNUTS & WASHERS & FILL W/ WOOD PLUGS CONTINUOUS 2 X E WOOD FACER- MITER CORNERS, EASE EDGES CNE O0ARTER (1/A) INCH 3/8" OIA X < LAG BOLT w/ WASHER- COUNTER5N1( & FILL W/ WOOD PLUGS MILL FROM TX 8" 277\ 3/8" E.J. w/ L1 �J JT S..iLER L-7, PAVING ELEVATION (2)-1/2" DU. ANCHOR BOLTS -EXTEND MIN. TWELVE (12) INCHES INTO CONC. FOOTING f4 4EBAR-FOUR (A) INCH CLEAR ALL SIDES 5/8"(-) CRUSHED ROCK a714517 CO.JPACT SUBOSAOE SECTION O BENCH NOT TO SCALE ALL METAL HARDWARE TO BE HOT DIPPED GALVANIZED. BENCH & CONC. FOOTINGS SHALL BE INSTALLED PRIOR TO CONC. PAVING. ALL w00D TO BE CEDAR - CLEAR 0 OR GETTER GRADE. LIGHTLY SAND ALL W000 TO SMOOTH FINISH 8JE_0E0 vrXT. FA31:C (5 ,6" 10/10) CLR. i n 4 CONCRETE PAVING TO BE COMPLETED PRIOR TO ASPHALT TRAIL INSTALATION PROVIDE SHARP. CLEAN & STRAIGHT JOIN1 BETWEEN CONC. PAVING & ASPHALT TRAIL 1/4' RADIUS FINISH GRADE CULTNATED SU2GR,GE (1D' DEPTH) BASE COURSE. F5E EIGHTS(5/5) DING:, 'J:NUS CRUSHED ROCK COuPACT 5G6GPADE CONCRETE PAVING OR CONCRETE CUR? C PLAT AREA FOR SHORELINE SUBMITTAL REVIEW ONLY 5T SEµ6d T//2" •AIDE s 1/2" DEEP ECESS SEALER ET SELOw ADJACENT CONCRETE ?ANNG. 8" i) V4' R. . SICE I If 1/2" EX ANSON :DINT FILLER MATERIAL ,-3/i STEEL OCwE(. w/ S.R yINSTA` C 1'-0" 0.C. CONTRACTOR TO PROVIDE A SHOP DRWG. FOR EXPANSION JOINT LAYUOUT 'WITHIN ALL CONC. PAVEMENT FOR APPROVAL PRIOR TO BEGINNING CONSTRUCTION. EXPANSION JOINTS 333)011 BE SPACED A MAX. SIXTEEN (16) FEET ON CENTER. O EXPANSION JOINT NOT TO SCALE AIT CI Ais S'V/+or [CT CISTOCATE A221A HOUGH BECK & BNI LANDSCAPE ARCHITECTURE PLANNING & URBAN DE51C 1000 LENORA, SURE 516 SEATTLE. WASHINGTON 98121 (206) 682-3051 Wirge STATE FEDAIO PROJ.NO. DESIGNED BT J. HOWARD ENTERED BY M. YELLER 10 WASh CHECKED BY C. HOUGH -BECK PROJ. ENGR. 8. BERG, P.E DIST. ADU. • DATE DATE REVISION BY wA 45111 �Washington State V7® Department of Transportation e 405 L— SRSR 181/GREEN RIVER INTERCHANGE WASHING' ARIZONA ENTRANCO CALIFmu ENGINEERS • SCIENTISTS. PLANNERS SURVE LANDSCAPE DETAILS ROOT CONDITION COHTAINER- REMARKS SPACING CONT- CONTAINER- PEFAS.HS. HT - HEIGHT QUANTITY 5PP - SPECIES SYM.- SYMBOL . ALL PLANT MATENALSFECIFICAT1ONS For -SIZE AHD CONDITION Are MINIMUM FECxJIFEMENTS, ArpAIIE IN ACLOtztAAMCE WITH THE AMEt -lCAN STANDAtzt9S FOtz NGtzSti2Y STOCI`' 1990 EOITI ON. IF A CONFLICTOCCLIFS t3ETWEEH'THESE SPECIFICATIONS AND THE ASNS,' THOSE 5IT.CIFICATIONS SHALLAPPLY 2 CONTAINED MATEPIAL MAY SE -13ST1TUiED For- 'l ANt7 Y>4t3 It= GONTAINEt2 ANt7 FOOT MASS Atzt . F.OLIALOP-GPl.AT1 PINSIZETHAN SP./S45 SPECIFICATION t`EQCIII2E`' 3 PLANTS, IFPAFTEb, SHALL -HAVE r'-OOTSTOC V- SAME GENUS AS THE SPCIPIEt7 PLANT I ISTATEIEEO. AK/ PR OJ. M0.1 . . (269)r- 00'00 • ezz Zc 41111MMIK WM .3S.6 'NEE', 1 3 . - - +000 g "., . . q2 PoSA H[.tl'ANA, T.23N. R.4E.W.M. q F3CLItX r5CL iA MENZIEZII LiTtiUJA PLILATA 21 COFiiJS'EFILEA zi f'O'aA HUf}'ANA 2f ALIXSPf. 22 MYFilACAUFOPnICA o' ar 2-5F5EorOiZ1GP MEfiZIEZII zZTHUJA NL:LATA 2 a CCFtiU65CFIGF-A 24 PeY>liNOTFAHA 24'.ALIX xiPP 2y ri NCA CALIFON-4[A 311 SYMPttCW LAI`POS ALUF5 49G SYMP40E-I AFft p.5-R/-'ate. 010 J OQ ij .I.n. atl gip -Prat 0 a R N0 e! 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(c./y e/2r F+./oJ Ce:111 11f.en V rm fe.ey Or r,t.r.kJ 15 CONNUS 1C.FA IS PO.`t4Nf1TKANA I5 SALIX 5rt IS MYPICACAUFOFNICA 1QE ((Off. or r.;.}s./e ) • fzlsj Cn sfn•,s n ,NJ fLt#7_,,.124_ppc T r,•,.•:aw n: uinuWtvc i Pe c.yo k`.b 7-1-01r1H ItOw NOT IN rrOJECT J4 88 • 11 13 GON'tiXiOeFIGEA 13 1,0 A I VTMA11 13 54LIX SPP. 13 11Y19LACALIFOFNICA y FFAX11445 L41FOLIA v GOIY1455EF1GEA y F05A NLJT•rAHA y I IX SPP. MYI4CACAUFOWiICA 7FtJFe111-15ALE0:301 F.ANA 71D 1NEA FFASERI Pseu %14A MEMJEZI I OT LIJA PL1CATA v FPAXIN4S LATIFOL.IA COW IU5 SEwCEA ti Rine., NUTFANA y SALIX SPP. 9 MYW.CALALIFOFNICA Ti.r..boet L/oe v me or Re .rrrreerritl n/ en F5E1-1I2OTS64.% MENZIEZII y THGJA'LIG. TA 6 F FAX1NCJS LAT IFOLIA it 1 SYMF'ticf .AF4O: ABGS roroo 347 PHOI1rEA FRASEFI C� 39 POPG'LLIG ALE+A'HA' I 117 PHOTINEA F 4S I 1.`I3-Ooo4 • T.23N.R.4E.W.M. 9 h1OFTH !'OW NOT IN pi-QJECr 27 AC-EF-C.:Pa-.-TUM 13 AC-E.F.- fr 2.PNYLLUM 27 A!IEL0+C.1-11=FAL7IEOL IA G P_YGSG ▪ f UT ';.aJF::y^Iz.A. 3 FAX NL'S LA'WOLIA 3 W;7 1 ▪ 1 1?aFIA 3(oFs5.1.'237S 15A 3c.711UJA PLIGAIA 11 1 v vcc.on Rnm.c ,5•115OL Qr 5PF!IE5 �'3o AGE..CIR .INATtp1 t\ \ 15 AGE.. MAC. RDPHYLLUM 30 AMELAtiGHIEF ALNIFOLlA 30 NyIG4' i ii 15 FMA5 11FIiLIA 15 Pt7FC1Ws'T1=E1'YJLOICES g. \\ v' 4Jpgus AC'Ll1PAFIA 0 3'1 roratKALEwenir-t.t!A' e'//H'i TY.UJA PLICATA • _5+to FG'SA r/1fi'ANA ;Y:f zit.f PtIOTI MEP, FF.AS�F-I ^-). 'XISTiNU I. 1-ATIOM 3 A:.ErGIRCJNATUM 2 ACE.t NAC O1'H' UL:1M 3 AMELAN'.HIEF ALMIFOLIA 3 COFLYUS COFNUrAYA1 1FOFNICA' PFA.XH'+Us L 1FOLIA I PO.KJLCi'77FEMUL0IG5-5 Of4MIS AUG(1PAFIA 9 FSECI12:717JGA MENZIELII 37HUJA pUCATA 590 pOSA rical&ANA 1 T'c ' Isere, rEa AID P.04 r.w • _!' T.�::.1 nnne,nu nr wrwmnve 1 ) 8 0 cap, -4,47•O a ay••• Its _ Aivy4#4 CP 20 4EArT0a) 7014.17iA T.23N. R.4E. W.M. ACceS5 • 1.).• R R t41 Liot -r1.as 56.st FoResoototishroont to h r -te CA, RantCot I\ Puit /Foot.. oda/ /71 Se 441 1.-LINE /30 • ; • • • ..\\ . '\‘• . \ 1 ,ves , , 4,\ , /,,0*„. / * , , , ..\\...„ • •„„.....,.......„,......„,„ •,,,,,,,,-- ---\\ • L2.5,41.1.054FIUWANA e PC.E1-GIICINATIM1 4 ACV- MAGPOPHYLLal 13 AMMAK•111EP. ALNIFOLIA 13 WfLY1.1h comiarAtALIFORI if fVfall•151110141.01IX-5 "i\ 1.' \ \ 4 FI.Axirtr,LATIFOLIA \ 1 \\ 9 :5P-ELI5ALIC4IFVOIA li \ ,I 15Ft0APCJI,L161A meriZiezu 7.:-. • 141111.1A PLICATA , ar ''A • --...............1 \,A ,..:\ ,. ' rocO Pe•re,4 i- A c,__...„.• ,_. 4`L21.;.'"'H '.1 '\ ZS I 01O.oer., ls••••• 5ooet 3# 000 7 AG31,-GIPOtiATLIM 5 AM,- MALPOPHYLLLIM 7 AMELA1CHIEF-ALNIF-01-1A 7 LOP1-Y1J5LOPtIlJTA 'CAUPOPHICA' 3 FFAX11443 I-ATIFOLIA 5 ROPOLLISTFLF_J-Y_ILOII7E-5 50114XIS Ac4a.117APIA 11 PhELIDOT561A MENZIEZ.I1 PLICATA e1.4.063 *BO • •STTEIgo..r2o_fri 1,4 COAMt. 51•03 5/n02 n Si net;on florui U.P.11 ACEF-LIFLINATatl 3 AC37-• FW-YOPHYLI.Z1M 9 AN5LAY-ICJIIE•F•ALNIFOLIA LCIL-Y645 C•Or-HUTA 'CAL1TOFHICA' FrAxirIUS LATiFOLIA 9 '''Vr•ii.L617el1acciel 50M5PLICLIPAPIA 11 Z3133-L127154•IGA MEtIZIEZI1 2311-13JA 13.ILATA L 128..75.00 P.O.T. • \ i • / Po, Relenquaost,Bnc t. Vi0C;f3 ••• Ra•••tor• ; / 5YlicOL. OTY 5er-Cle5 i \ Zi 1.4r--P-CIFCANATTArl II AGr.)=4-1)504,NYLU.111 6 23 AtielAFICHIEY- ALNIFOLIA 23 CLIICKISCCH/LITAZAUFOINC.N 1 12. FFAXINC15 LAT1FOLIA 7\ iz FriftIL4313EYMDIDES 12 e719:1•45 A4CJAPAPLIA Ei'\, litt FSECJIPTS[4,4 HEtIZIELI I it',/./.7•17 T MOJA 13ZATA C--,-,j 2544, F2OSA NUTI,ANA 7-•-•-• E_XIT11.--16 VEGETATION •, N 53 PJFULClS ALbA '1I;OLLE4NA' 151 PHarII A FPA W 01PiP.;PULLISALEA'aOLL AhA' L15FrIOTIrfEA FFas 0 0 0 Lq3 -000'F 5Y11DOL ar 41,ECIE5 0 67 PO►'JLC1S ALN-1. •e L L.2 r A • ..MM L°a::l:l: sob 5M^.FPaHCAr+Pns ALegs '' • 204 pliant —ma FFAsF__F-I /Th EXIST-06 VEGETATION T.23N. R.5 D - l/ o Caa pcelc N'>• • E. W.M. IaG SYYIPI10E-1 AFFOSALL•WK {— -y+W Ave 12.50 CO POT .,1,1 alp , hi1 -.i J r .:t SYriPHOFNCAIgP '5 ALSd 74. • PCO-!JNEft _ �o Pf, z� Zs +t a ail lr `r 1:55 -5YMP:+w'F•CA fry ALtGLi 1• ..ti os i • -1 . 50 !O lO .!O •OO 200 KALE 1N FEET • '! f r�r ....... Lq3—OQo4 :z II J1� ' • -�, l • iJ " � , I I ;55 JJ __,••• -- iSPL ? 1-4.i:C-FOPtiYL'.;,'M1 30 MEt«H_'- IE? ^LNIr�JLI 70%%F_-YJ7;!_ `•"IUTL. A\'I iL:5 LTli rLIA 15 =c? 1 Sr,E1-1UI.0lcF5 :{Jj r�`_-r: ;� �.ta. � i F_NZIII \-.--44.\ N: -7. , ., 7 -, `\'; \� �\ „::, % '� ii��/% . :ems ' ,'^" • .7, .%SI:.'''''''-1**---- 4 1 ' '''' :: , , 1 Q"- A itIN I .'J • DESIGNED BY 82! ENTERED BY CHECKED BY ,.1€ PRDJ. ENGR. $I'I' 015T. AGM. 0. GAULT R. BELDEN J. HAMtiRSMTH B. BERG. P. E. DATE BATCH TO SHEET 9z DATE r-- '2 ENO OF. -PROJECT BL.113+69.00 P.O.T. SR 405 113+69.00 •P.O.T. M.P. 0.95 MATCH EXISTING BEGINNING OF PROJECT,-= - AL 108+25.00 "P.O.T. (66' LT. SR 405 108+25.001"P:O:T:- -= P.EVI SIDN 9Y TATEI WASH ENTRANCO • •1.41,41P �® WASHINGTON STATE VO((/ DEPARTMENT OF TRANSPORTATION ea Ica SCALE IN FEET 27.4110 SR 405 SR I81/GREEN RIVER INTERCHANGE DRAINAGE J: A t`` ;. ``\ PROJECT LIMITS 1 .23N. R.4E. W.M. INT 118+93.70 11 If 1 <= . N. I/ Cgf./q - A y • 2 r$. i/ S. • eir / / j !p � t P `.N N Y.:- \'� P j /0 11 -- qV\ i .� \ ``�. ,‘ r" b J• .. E T x1 i :g ,t sa[=� ��• • '/ 0 50 I00 k�002+ /�' SC .E !v FEET i. g �! ol �'131 MATCH TO SHEET xx • .. ISTATEf FED. Al D PROJ. NO. DESIGNED BY R. 6 DEn 10 r'ASCIO ENTRANCO SR 0-2 ENTERED BY R. BELDEN IWASHINGTON • 411.116. STATE ER SR IBI/GREEN RIVER INTERCHANGE < ; T'T {!. CHECKED BY J. HAM£RSMITH +IM....• �� .Kt•w R"POI.. .As..;.ia DEPARTMENT OF TRANSPORTAT ION lat.r PROJ. ENGR. B. BERG. P. E. DI ST. ADM.OF m.rrn I%IJ`li DATE DATE I REVI 5! ON BY DRAINAGE .•.< . J.A. A.: ucnonid aoulfodu^, Oregon Gr...e 8b5 gu.thur:a Snc.lon SCICI .,.7.OEEED C:.Lt ;9.6-3 S: Erosion control - nycraseeeing A I . 15.750 SF '0Hallo.er nyCroseecin0 PSueOOtsugO 5en2ISil Doug Fir Thula D;i0Ota Western Rea Ceder r circlnatum /h V CCIC 21•'•30• Fu•I.on Drono 7*d and ll OJ real 15�— P.F. 4,035 HT, root una 0�.:revno oCCeCtcD:e. 1.1 pion♦ o -0' O.7..C.?rlong,Cr spacing, iB .r 10'-12' Full. well branched cm? '.e*I r°Dtad: Sproaa foot Sound plontS are not aCCeotable. Plant ele•O.C. erlor:cu.or SDCCIf.'•. HT. HT. HT. IO Prunus serru!ate 'r.cnzca' I/2' k.cnzen Cherry CAL. c•.ac 6 '/actinium ovctu'n i8•-28 Evergreen Huc0I070rry HT. Ame!ancrler antt011a 21'-24' Serviceoerry HT. BSB: multltrunrec ./ min. tnreel3l trunk S: tul 5 well prone:ea: corrected mdleriol3 not °ace:matie. B&B: funs well arancne0: min. 51.161 foot Drancn:ng nr. 8&B/COPJT:funs wel0rancnea ant .eu rooted: root7ound and ecneCteel material not OCeept owe. 86B/CONT•: fun ono wen brancnea s well rooted:roatbouna moter:cinot occeolable RECEIVED AUG 2 0 1992. TUKWiLA p1.t FW,N¢f1HKS I. - 000Lf I J. HCAARD M. uLLER C. n000H-BECK B. BERG. P.E. 10 DATE DATE . REVISION IBY See specifications-SpeCla trbvislon5 See spec! f too lions- Special provisions `/ tre:suor OMOCTeell cnoterlocrea II trees or couectnu malaria not acceptcblri�T '/// B&B: fun& we!Droncned '1// // Y!/ // gg/ / // .// Tat// 0 0 0 P.M. 2 T.P. 2 H1OROSEED ONLY TREE Mix AREA P.N. 170 T.P. I70 Pnotlnla traserl Photinla 0.38/CCNT.: Nacre .dnbroncnec: 'IT. plant 0 S'•0. 0.C. triangulor spacing PSuedntSuaa menz1511 '-3• Doug Fir 11T. Thula DHaata western 300 Ceder ut, TREE & SNRCO r110 AREA TREES A.M. 68 F.L. 68 S.A. 68 P.T. 68 A.C. 68 A.A. 68 C.C. 68 P.m. A.035 T.P. 4.035 SI,R0BS R.R. 537 C.S. 537 R.T. 537 S.Y. 537 M.C. 537 TREES T.P. 6 P.M. T Acer mocrOOnynum Blcleaf Maple Fraxins latifolla Oregon A5n Sorbus 0Cuparlo •'-' European Mt. Ash 11T. PoDulus trerrulo:ces Ouoi,ing Aspen .... leer clrclnatum :'•- Vine Maple HT. Amelcncnler cnifoda 15-!9' ServICCberry IIT. Coryius cornuta colifcrn"5519' 11a2enut :IT. Psue0o7suga menzisii Doug Fir Thula prc0t0 western Red Cedar Roso rugosa w)0 Rose Corns stolonlfera Rea Twig Docwooa Rhus trilobata Sauo.busn Su810C 5ymbnoricorpos C:Du5 Sna.oerry Myrlcb ccllfcrnlca COlitorri;o Ac. Myrtle Thuio pli0ata western Red Cedar Psuedot sow mcnzisil Doug Fir 38 POpulus 0TJa Bolles 0 804cuf0 Lombardi Popular PsuedoT5Ug0 menzisii Doug Fir Fur.weebr0n0ne0 ono wenrooteat root bound or Cbn1Ctea plants ore not acceptable:randomly intermix plant:r:s of trees at l0'-0' 0.C. triangular spacing. Fun, wellbrancnea cna .eerootea: r001 p0una or co3ected 2'•J' pionts ore not acceptable: 111. randomly intermix plantings of trees o I0'•O.O.C. triangular sooting Fun. wen Drancnea •/T. cna .eerootea: root bound Slants 5,18' ore not aceeotcble: IIT. renaomly Intermix Diont7n0 of snubs between trees o NT. triangulwr spacing :5•-la• IT, 5•-19' 8'•10' B&B: full and welt branched: snored plants not acceptable -!0' 1330: toll anal wen brancnea: sneore0 11. or 6Ouec7ad plants not 00000tet'le D&B:fuHana wenbran0nea BSB: fud6 wenbrancnec: sneered HT. trees or conecied materialnot acceptable Thula pGcatC Y-I Western Rea Cedar .HT. E.C.H. 164215 SF Erosion Control Hyaroseea N.H. 51.955 5E STATE IED.AID PROJ.NO. MASH .61111181 10.111421 Erosion Can'roi Hyaroseea B60: full& wen0rancnea See speci float Ions-soeclaiprovisions See speclticatlons-soeci1Drowlsions E— NOTES '11r 0.5CREPANCIES 'i*TH DRArerioc CO .t.C16 SHALL PE BROUGHT TO T A lEt iwl, ._ E L .CSC0PE _R. I1E4T PPIG TO F,JLCLCCPIG warn C'•.S'auChC:. AVOID 0A1.L;,E :80VE AND BELOW GROUND T3 ExiST/:G PLANT MATE7,ULE TO PEu<Ir1. ALL 0,.1(s MRS A1E TArEN AT •.0 DEGREE ANGLES 1-71..; )1et:..,,E ALL MATERIALS 70 BE DISPOSED GE OFF Slit AFE TO oE C...P3SED CF IN A LAM i L'L LANDFILL AND e1 ACCORDANCE MITH i.OvERc.MLNT R1..UIREUENTS. THE CONTI,AC TOR IS RESPONSIBLE FOR LOCA1:nG UTY111E5 PRICR TO BEGNNJ.: CON'TRUCTION. LANDSCAPE CRAA1IGS ARE BASED UPC9 DR:A NG5 PREPARED BY ENIRAN,) ENGINEERS. REFER TO IPEuFICATIONS-SPECIAL PROVISIONS FOR CULTIVATION) AN] SCa AMENDMENTS FOR SHRUB BED. TREE MIA AND TREE S SHRUB MIA AREAS. ABR.EVIATIOUS 0.C. Cu CENTER ID. :NSW. OtuJET ER BSB BALLED AND BLITLAPPED R.O.w. RIGHTS•0E-0A' CONT. T. C0.1T_':NER 0.P. 07 (010AO PU AER 0 oT S0. C1:PE S.F. 000ARE FEET CC1IC. CCr.C6.TE 'IT. u:NSJL'Y STA. STA TI.:1 rl T. n'IGNT PT- PC. t C:.t. ULIPER ',FPS. 901UF AC17PER5 M. p:NLTER i CENTER: r£ GA. GIJACE E0. ECusl GAL •. G..100?0ZED A9H. 'BREviA I.;Ai T IP. ITPICAL OTY. CUu111tt S Arr3 r1L. STEEL / ANH E.J. .'PANSiON JL:Ni DRAGS 0030171G5 J.T. 'Oa1T STD. 510750RD CLR. CLEAR R. RAO:OS u.8. u060,62 BOLT PLT. PLATE LEGE::D • R.O.W. LINE - LIMITS OF GRADING LINE IAPPRCO,1JATEI OVERHEAD POWER LINE RP RAP OVERHEAD LIGHT FIXTURE CENTERLINE 0/ STAT:Cr* PCIIITS PROPOSED & EXISTING CONTOURS Ez15TeiG VEGETATION TO REMAIN CETAR IDE1m0IC. turf L-o L...— ;nEE1 I.D. 411.16 Washington State WiDepartment of Transportation IIOI. I, H:ic( ,'. T3,'11D 1,455.'APE K 11IFC1I...E PLANNING S I...r LEN„RA,:u:TE 5u . T it E..• Ae11GTOv 9Siz1 ICGei ed2.3.51 WASH111G T ON ENTRANCO .AL:F"'NIA ENGINEERS • SCIE)I ISTS • F_! tN7RS • SuRoEYORS SR 4L)5 SR IBI/GREEN MAR INTEkCHA,4CE L-4 PLANT SCHEDULE A NOES 1 T.23N., R.5E. WM. -el4P37.-4i:i 1-1E)-:1E21:! PL!,!..ATA --- . ---,„ 1 _.., . s ; , ---,--- ,.,_____ ... • •:7,-;-:--77— ,-....., , :-7'"',27-1.1,/,,,__•,___14.,,' ----) •/,;---•7•-,:-.• •-• . /2 ///z/ . . . ,- —___ „, • , ;. ., ..-/,./ ..'4:: --,,t •••!----- . ( • ..... --...._ • V V . '''''' :.:4;--.'' '1,...'. 47.4t j -."---P---- - - ---,..' /A', • . ......4-_, .r •-. .., .,• ,.. • ..... ...... „.....,„,. ,4- . , ' „.— - .- ..),,,.... .• .- ------ • ,..,,-r•-• I ; 27:2SYMF)-)0T'AF-T.f."512 ........ s.-------. , - •••• '-',- . _. _ . .1. • , / . ..--,... . . „.,,,, / ./ ---------'-•'•-',--------------.‘ -.-<-. ' , - -.-. , . . . . . -'-....7`. ,r ...,- -4 •, • ;• 7,7,27 •, •-- , .., 7 ( ) 1 r,- ,/ • „r—^^, ./ -•7j IA 3 C004 MI IR 1 • r•••-, _ - • r),i1-150L IC/TY -.-.MC.iE-5 ':- /// )0.a .rr75:12-Tf4.:-.1:: )01 1".1in P'-!;.,74. % --'-- E-...".:STi. r... )•....S.-E_.--7,:-`.7:2;7' , - • . • • • • ' • • "" - ^"CrPLANT '\ ., !n,•.L � MULCH ..-`— 3•l 111,1;II•:i�1111�11^.,. .I.1110!:IN111111ll0 11110,11 F •;FH GRAM 1 1'-“ ''.''1t1 C••• ••-y t"'•-PEEL BURLAP B. FRGu TCP HALF 4G0 ,1.1. -5.-+,• 6 K. 7 RE40'+E BURLAP Tri CEPTn •.•_ _ �•.p OF RGOTBALL.. y .iii� :ERTrt.I: ER 5 PCL ruERS I c:C'F:LL SO L-THOROLGHL! .ATER SETTLE LPL>N1::G nct El �rCIAPAC TE.7 Er15T^.G SKKL 70BED LARGEROLquNO TO SUPPCR7 TREE A T A.mcLE BAC.rILL:•.G y0010AE1 FOR ROUN000'.E 12•LARGER 1H>N CIA. OF ROOT GALL FOR Sr.R1BS =TION r:01 E: 4LLC11 SHRUB RING SHALL BE T.ENT1 FOUR 124I RICH MA.. N n5DR05EE0 AREAS. OSHRUB PLANTING DETAIL r.UT TO SCALE —2/3 RECOu4ENDED PLANT SPACRIO ECUALS � SETBACK FROM EDGES OF PLANTING /• " ' a • % BED -TRIANGULAR SPACING 01540E BED EDGE OF SHRUB BED ;.;SPACING i€Y7!s,_• • •• r 2/3 RECOMENCEO PLANT SPACING • r RECOAIEN0E0 PLANT SPACING. SEE PLANT SCHEDULE • . CENTER OF PLANT OPLANT SPACING NOT i0 SCALE Lq3-IIY:04 3•uuLCH•KEEP AAA, PCV TRU1.I GF PL AN.T, PEACE PE -BAR .T A.E OR 1.0:D.ARD SCE OF TREE PH0T11A SHRUB 8E0 TO BE SET BACK 5'-0• FRG4A EDGE OF R0a0w4Y BARRIER 0R GUARDRAL. OTHER SHRUB BEDS TO BEGN AT EDGE OF PAVEUENT 0R CURD. DESIO,•SD BY 0. HOwARD ENTERED BY U. WLLER CHECKED BY C. HOUGH -BECK PROD. ENO. B. BERG. P.E. GIST. A0u. L_ L ) ,RAP .IRE ENDS T ( Ro:5D RE -BAR \1I III FE-BAk •9 Gi p1"N TREE TNur.K —r4T SECL:RE TREE TRUNI, TO STATE n, 3 RUGBER HOSES a 12 GA. GAL v..IRE - TURN BAD: MIRE ETAS INTO STAKE HEIGHT•-1 -O. ST ATE II PLANT AT °:HE LEVEL AS GROwn• TOP OF ROOTBALL TO BE L0_vEL ni fi SURROUNDP4G SO:L —FeaSH GRACE DO �!4•i • .`f= PEEL BURLAP BACK FROu TCP HALF R T•_ _TI DEPTH �' ��� • ��.�- OF PCOTBALL. REMOVE BURLAP n•.ay 1_ CCUPLETEIY ¢•u4 � ri Ttll OERILI:ER S POU uERS / a.r,Rr.u.E I �B>CKFILL SCIL THOROUGHLY '%IS':IC •-� *A1ER SET1Le. SOIL 'HAN 01 t. OF I COUPACTED Ev611NG 504 R0015*.L 4CUND TO SUPPORT TREE SECTION 0HILE B+CKFLL+NG Q CONIFER TREE PLANTING DETAIL NO1 TO SCALE 'I',r,irr ROOT DEPTH' —PLANT 0 SAME LEVEL AS GROWN. TOP OF R00TB0LL TO DE LEVEL WITH SURROUNDING 50L. FERTILIZER S POLYMERS / ,-UULCH-11U+EE131 RICH DEPTH -KEEP AWAY FROM TRUNK OF TREE OR SHRUB. ''5\/' TAHROUGNW07ERO BELawLE7 50LP POCKETS. FIRM BKCKFLL SOIL SLOPE TO DRAIN 12• LARGER THAN DIA. OF R00TRd1L FL.R SHRUBS S A• LARGER FOR TREES PEEL BURLAP BACK FROM TOP HALF THAN OIa.OF NOOiBdLI OF R00TBALL. REMOVE BURLAP CONPLETELx SFFi4ON TREE OR SHRUB QPLANTING ON SLOPE NOT TO SCALE .n' STATE! FED.At0 PROJ.NO. 10 IWASHI DATE DATE REVN510N ,BY Itwtuct rL u•R CH -KEEP A*AT —� Ft ..0 1POr.K OF PLANT. FL ACE RE-8AR STAKE Cu *ND mAR0 SAE OF TREE Lc IF1.t.K AHuurA RE-0. �� IO RE -BAR TOP OF PE9=R —"„wr�� W. 1N0 L.•S1 LECurE :Pr_ '••.;K. ,n LTAKE IV/ PEE_ =-V...AE TURN • �FL.NT AT ::uE LEVEL AS GROWN. 'CP .F ::0'2:.L TO •E LEVEL w SLRRl:1.N...�,i S.. t r'-E1 raft FFOU TOP H: GERM k : GF ROC TBAL �. 1c40*E U. HI AP _ - 1..�r-•N--J E_''1�- \CaupLET ELY 12•uiN. Liles FERT IL la S POLY UrWS 5'-0' STATE. C' RGD1e:LL -�,� \-SA..., LL I..l- TIIORWo1LT LL 11,.. 14R \ n>' P .E11LE. E+I$TONG I THAN OI:. Os'I -• -AC1 E3 ErISTmC NOL SOIL RCOTBALL •01 KFCT10N n•.4: -. •L'r•C DECIDUOUS TREE PLANTING n1 TAIL NOT TO SCALE 'Washington State �I/ Department of Transportation HOUGH BECK & LANDSCAPE ARC1A1E1 P. ANNI:G & URBAN Lo itNt1A,SI1TE 5:E 'r a TILE. .+1•tvNi.10H S G6i1 152-10Si ENTRANCO ■AS• ARO CAL• ENGINEERS • SCIE'.TISTS • PLANNERS- SUf, SR 405 SR 181/GREEN RIVER INTERCHANGE LAN.SCAPE L)ETAILS DESIGNED BY J. HONARD - R5 S.F. - E.C.H. EXISTING TREES A BRUSH [DO NOT DISTURB) ITYPJ Lei 3- 0;04 5HRU8 BED 106 - N.A. GREEN RIPER ENTERED BY CHECKED BY u. NILLER C. HOUGH-RECK PROJ. ENGA. B. BERG. P.E. 10 • SHRUB BED 696 - G.S. SHRUB PLANTING OETAL ITYPJ STATE) FED.AID PROJ.NO. WASH JCS NASD MST. AON. DATE DATE 1 REVISION BY REST AREA -REFER TO SHEET L-5 FOR LAYOUT AND CONSTRUCTION PLAN. NOTE: REFER TO SHEET L-4 FOR PLANT SCHED. NOTES. ABBREVIATIONS & LEGEND PLANTING SHOWN ON THIS SHEET IS LOCATED ON THE WEST SIDE OF THE GREEN RIVER LNITS OF TRAIL GRACING ITYP.) SHRUB BED 64 - Y.A. • TREE PtANTNG OETAL IT TPJ 1:100 S.F. - E.C.R. 130 SF. - E.CJL T00 S.F. - E.CJL *Washington State Deportment of TronsportatIon HOUGH BECK & BAI: LAMSCAPE ARC1STECTU) PLAWANG & URBAN DE` )000 LEHOR5.SUTE TE SEATTLE. RA519MGTO. 9A1: 12061652.3051 VA.S111h AR120N ENTRANCO Cµ`D ENGINEERS • SCIENTISTS • PLANNERS• SURv) SR 405 SR IBVGREEN RIVER INTERCHANGE REST AREA LANDSCAPE PLAN 7 Li)ze677 670044 — Qc. 3 dam T— 4) ,..? e 73 At 90 , ' " ?:1•.'4#'1 • SGf3G✓ /- yob 6c ebe • . / -A'!, 7 • .7- . prepared for CITY OF .TUKWILA,' SOUTHCENT ER BOU LEVARD TABLE OF CONTENTS PAGE TABLE OF CONTENTS i LIST OF FIGURES iit LIST OF TABLES ii✓ NEED FOR THE PROJECT 1 DESCRIPTION OF PROPOSED ACTION 7 IMPACTS OF THE PROPOSED ACTION 12 A. Earth 12 B. Air 14 C. Water 17 D. Flora 20 E. Fauna 23 F. Noise 24 G. Light and Glare . 28 H. Land Use 29 I. Natural Resources 30 J. Risk of Upset 31 K. Population 32 L. Housing 32 M. Transportation /Circulation (33:) N. Public Services 45 0. Energy 48 P. Utilities 49 Q. Human Health 50 R. Aesthetics 51 S. Recreation 53 T. Archaeological /Historical 53 U. Economic Impact 54 ALTERNATIVES CONSIDERED 56•GS COMMENTS AND COORDINATION 61 TABLE OF CONTENTS (Continued) APPENDIX A Flora Inventory Fauna Inventory APPENDIX B Air Quality Assessment APPENDIX C Noise Assessment APPENDIX D Cultural Resources Assessment. ii PAGE A -1 B -1 C -1 D -1 LIST OF FIGURES FIGURE NUMBER 1 Project Vicinity 2 Project Location 3 Existing Alignment 4 Proposed Alternative 4a Site Vegetation 5 1981 Average Weekday Traffic 6 1990 No Build Average Weekday Traffic 7 1990 Recommended Alternative Average Weekday Traffic 39 PAGE 2 3 8 10 21a 34a 38 8 Alternatives Considered 57 LIST OF TABLES TABLE NUMBER PAGE 1 1979 -1981 Accidents 35 2 1990 Level of Service 40 3 1990 Traffic Accidents Estimate 42 NEED FOR THE PROJECT Southcenter Boulevard is an important east /west roadway that serves as an alternative route to a heavily congested section of I -405 for trips between Renton and Tukwila. The portion of Southcenter Boulevard scheduled for improvement lies between 62nd Avenue S. and Interurban Avenue. It is currently a narrow, curving two -lane road with unpaved shoulders and open drainage. West of 62nd Avenue S., the street widens to five lanes with curb and gutter, sidewalk, and closed drainage. East of the project, Grady Way is being widened to five lanes with curb, gutter, and sidewalk. Southcenter Boulevard curves north along the west side of the Green River, intersecting Interurban Avenue approximately 600 feet north of the inter- section of Grady Way -and Interurban Avenue. The resulting offset between Southcenter Boulevard and Grady Way requires that east /west traffic make a weaving movement between the two intersections. There is limited left -turn storage on Interurban Avenue, which frequently overflows into the through lanes during peak hours. Traffic signals are currently located just west of the project at the intersection of 61st Avenue S. and Southcenter Boulevard, at the Interurban Avenue /Southcenter Boulevard intersection, and at the Interurban Avenue /Grady Way intersection. The speed limit is 35 mph. The 1981 average weekday traffic count is 8,800 vehicles per day. Southcenter Boulevard /Grady Way has a functional classification of "minor arterial" from I -5 into Renton. Interurban Avenue (SR -181) has a functional classification of "principal arterial." Geometry along the existing roadway is poor, consisting of a series of horizontal reverse curves connected by short, straight segments. Sight distance is limited due to the adjacent topography and the roadway profile. The Green River and the I- 405 /SR -181 interchange ramps are major obstacles to improving the alignment for this section of Southcenter Boulevard. The present alignment and narrow roadway increase travel time and congestion in the corridor, which reduces the effectiveness of Southcenter Boulevard/ Grady Way as an alternative east /west route to I -405. Edmonds Woodway • • Bangor • Indianola Potalstto 1 • .• •••• • ' • •'' Suquantsil . - I r ,' Poo • .• •• AM". Pt N.! tEmnsville• Fins..:ita ,Uto. 1.4 • - yrs o • Rolling Play C... .7. • Z.. ',-,...,,.11 PI Winslow 1 • '-'tt f..tutme ..41/4 . ,. . • .000. l.......,,,, 1.../ / 0 •••• 1 ■ ... , / . Vit••••••• • Roil Blakely . ..." ''-l-'•.? PIO/bd.' ;,,, ......, ,,, / ,..4:!1721 • •• vuoen 7.41oration, ..- • ,,,a4.,...', AU. A...se...Y.:PI . Pant ..,' . . ,.. b.... i) Ku • ' ....." 1 Point --.: F-''' . . ■,.3, ., a100',, iMoonhI.aho Britt ;11.: ,3"' 1 west PAO. , altby•C • 4 •Woo.Pn tale Sr 1J. ,,,,, 3. '!.1 JuanIa tit! • I • Redmond ;Led' 1 la • ) of3ellevu, • la Kirkland , • : ,t , , • • Port • Orchard ., ,■• I.ard I, ••••• 007 : ' • r'' I \‘..r 7' ‘■., .,;,'Mancheslet \Coknesiel ... ll',''' , • .......,, n.,.• .,0......., 1 fir:... s'• COlhy ' . ,,.._ • . / WI:17::ins )1 iii *h k......,'' ' "■"f ". -. - - -B;;; Vast ar%,'" ',."'' .. soothwoun itt.Vachon HeIghls '\ ••■• . / ". '.'.... , tttond, PI '5E IT-'-z-' • • .0=1- 1 .Ode HNI MdlnaO 1-2:creo . , • MerCer ,c1.1sland '0 Bethel .1 /0 Pet, 't 12111m Renton Vasnon-1.. Codtt4 , Dlr.* • tt...• Point " l.;ritopt to .....i, ;,I ( Illopoil o • llnalvid. Sw )?.t. . ■S 0.Porlaye \ Dti \ • Z I ( MOInei .• ".. 2.0”. itobinbon --.. - ' . • Poml Zenith i Do, kJ!, . . ..,. a Vt.!' SoOtwors.*:. [tom...um ...ANI TUKWILA Normandy E y•Al .0 Pa Purdy; tr :tat. • . •••• 4 1,11011 ..• 0 Ray NORTI-1 ENTRANCO EnGineers • ;Cid Na/bor es ,szoini,quan . •,41-1.1`' :Ai, • Redondo cy • • • • •••• al■■ Roolon oa 100 tv • City Of Tukwila & ' •.....,..`.;- .:'-', •,':‘,1:i. '''' 11 111. 1, . . (..:!.." , • : t • I)01. •" ' • ' '•' ' '' -t„,4. r •:•:,..„,,,. . :-....,„ c..........,,•,, • .• • V - :. e,,....o.,) ... ., , ,,-• . . \ st ...I.. st, •• 4 I d, , - • 14•1. SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way Figure 1 PROJECT VICINITY lo■Nom■Nommell +NORTH( ENTRANCO Enyneers City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way Figure 2 PROJECT LOCATION 1 The existing street system within the study area, particularly along SR -181, exhibits considerable operational problems. Through traffic from Grady Way to Southcenter Boulevard must turn right onto SR -181 and then left at the next intersection onto Southcenter Boulevard. Existing data indicate that this, as well as the reverse trip, is a high - volume movement, particularly during the p.m. peak hour. Although level of service calculations would indicate that this section of SR -181 would operate reasonably well, the high volume of left turns onto Grady Way causes considerable congestion. Left -turn storage is not adequate to handle the volume and cannot be lengthened due to the proximity of the two inter- sections. Vehicles back onto the through lanes, restricting traffic. Since these intersections are quite close together, the backups can actually extend into the preceding intersection, blocking traffic there as well. The operation of the section more closely resembles the level of service at the worst intersection, that being level D -E. The Department of Transportation counted traffic on I -405 and the access ramps in 1981 in conjunction with its high occupancy vehicle (HOV) study. These counts showed that freeway lanes through Tukwila are now operating at or near capacity during peak hours. Even with the additional HOV lanes proposed for 1-405, the freeway lanes will be operating at capacity during peak hours. Traffic volume between 1981 and 1990 is expected to increase considerably in the Tukwila area. The Tukwila Micro -Model Study, completed by Entranco Engineers in 1981, forecast a growth of 33 to 46 percent in vehicle trip ends over the ten -year period between 1980 and 1990 for the commercial - industrial area. The Southcenter Boulevard /Grady Way system is the only parallel arterial serving the I -405 corridor. It presently does not function adequately as an alternative route to I -405 for local traffic, partially due to the alignment shift at Interurban Avenue. The comprehensive street plans for the city of Tukwila and the city of Renton, as well as regional goals of the Puget Sound Council of Governments, include an• improved east /west arterial in this corridor. The roadway section proposed by this project is the final link in the route. Sixty -three accidents have been'reported along this section of roadway over the last three years, resulting in 19 injuries. There have been two major types of accidents: intersection accidents involving turning or stopped vehicles, and accidents along the narrow curving roadway between 68th Avenue S. and SR -181 and between the Grady Way Bridge and SR -181, usually caused by a driver losing control of his vehicle. With increasing traffic volumes, the number of accidents is expected to increase. At the intersections, the level of congestion will increase and with it the accident rate. With the completed project, future accident rates are predicted to be below existing levels. Metro Transit's adopted 1990 plan includes a package of major service improvements in Tukwila aimed at creating a Regional Transit Center in the Southcenter /Andover Park area. This Regional Transit Center will be a transit focal point, and will coordinate transfers between local routes and through routes going to the Seattle CBD and to other activity centers. Current transit service focuses on downtown Seattle and on peak hour service. Future plans are to expand service to all day on existing routes and provide new service to areas that are currently without adequate transit service. The timely movement of buses on the street system is critical for the implementation of Metro's plan. Metro has requested that turn lanes and radii, signalization, and channelization improvements be made throughout the route system, and has specifically noted the need for these improve- ments on Interurban Avenue and Southcenter Boulevard as being essential to facilitate the movement of transit vehicles (see Metro memorandum of January 28, 1982, "Comments and Coordination" section). 5 The Tukwila Park Department's plan for sidewalks and trails includes the junction of two major routes within the limits of the proposed Southcenter Boulevard improvements. An east /west sidewalk /bikeway connecting Tukwila and Renton is recommended for this corridor and is currently either completed or under'construction outward from each terminus of this proposed project. The Christensen Greenbelt Trail extends from S. 180th Street to Tukwila Parkway. The proposed project would extend it to Fort Dent Park. There is currently no sidewalk in the project corridor. The Puget Sound Council of Governments has given a high regional priority to the Southcenter Boulevard improvements because of the major corridor it serves, the existing congestion in the corridor, and the project's significance as the final link in the route with improvement projects completed or under way on both ends. In summary, the proposed project will help reduce the existing environmental problems: 1. Traffic congestion and.high accident rates. 2. Poor pedestrian access and safety along the corridor. 3. Restricted transit operations. 4. Limited function as an east -west arterial. 6 DESCRIPTION OF THE PROPOSED ACTION The Environmental Assessment coincides with a preliminary engineering study that addresses proposed improvements to Southcenter Boulevard. The proposed project will provide an improved connection between Renton and Tukwila along Southcenter Boulevard /Grady Way. The proposed project is located in the city of Tukwila adjacent to the north side of Interstate 405. Tukwila and its vicinity are shown in Figure 1. Figure 2 shows the project location. The project limits are 62nd Avenue S. on the west and Grady Way on the east, and include intersections with Interurban Avenue (SR -181), the southbound on /off ramps of I -405, 68th Avenue S. (Christensen Road), 65th Avenue S., and 62nd Avenue S. West of 62nd Avenue S., Southcenter Boulevard is a five -lane facility up to its connection with I -5. Grady Way improvements, which extend from the eastern terminus of this project, will soon be constructed, making Grady Way a five -lane facility. Upon completion of the Grady Way improvements, this project segment will exist as the remaining unimproved link in this vital east /west arterial. The existing roadway alignment is shown in Figure 3. In October 1981, the Tukwila City Council authorized Entranco Engineers to perform a preliminary engineering study to determine the nature of the design required to complete the unimproved segment of Southcenter Boulevard (Southcenter Boulevard, 62nd Avenue S. to Grady Way, September 1982). That study and this document have been prepared under the auspices of the Tukwila Department of Public Works and the Washington State Department of Transportation, State Aid Division. Funding for this project was made available through the Federal -Aid Urban Systems (FAUS) program. 7 Four basic alternatives were developed and evaluated for this project. The four alternatives are: (1) a "no- build" alternative that evaluated the effects of not improving the route; (2) widening the road to five lanes on the existing alignment; (3) constructing a high -level bridge between 68th Avenue S. and Grady Way spanning the Green River, the I -405 ramps, and Interurban Avenue; and (4) realignment of the roadway between 68th Avenue S. and Grady Way, creating an at -grade intersection with Interurban Avenue. See the section entitled "Alternatives Considered" (page 55) and Figure 8 for a more detailed comparison of the alternatives. Alternative 4, realignment at grade, is recommended as the proposed alternative as it best meets the objectives of the project. Consistent with City policy, access to Southcenter Boulevard from Old Macadam Road right -of -way will not be allowed in any of the alternatives. The principal features of the proposed alternative are shown in Figure 4. The recommended roadway section for Southcenter Boulevard consists of two 12 -foot wide through lanes in each direction, with a 12 -foot wide two -way left -turn lane the full length of the project (approximately 3,500 feet). Curb and gutter with closed drainage are provided on both sides of the roadway, with an 8 -foot wide sidewalk /bikeway on the north side only. A new traffic signal will be installed at the Southcenter Boulevard /Grady Way /Interurban Avenue intersection, and at the Southcenter Boulevard /68th Avenue S. intersection, with minor revisions to the existing signal at the Fort Dent Park /Interurban Avenue intersection. Continuous illumination will be installed on Southcenter Boulevard and the realigned I -405 ramps. Three new bridges are required for the recommended alignment, including one on Southcenter Boulevard spanning the Green River and two on the realigned I -405 ramps: one crossing the realigned Southcenter Boulevard and one crossing the Green River. The two proposed river crossings will be a three -span design having superstructures of prestressed concrete girders with cast -in -place concrete deck slab. The Southcenter Boulevard Bridge and I -405 southbound ramp bridge over the Green River will have minimum vertical clearances to the 100 -year flood elevation of approximately 6 feet, as recommended by King County. The I -405 southbound ramps over 9 Southcenter Boulevard will be two prestressed concrete box girder superstructures having a minimum vertical clearance of 16' 6" to Southcenter Boulevard. The proposed trail system element (see Figure 4) will begin at the intersection of Tukwila Parkway and Christensen Road /Christensen Greenbelt Park and progress northward along the Green River. It will pass under I -405 and realigned Southcenter Boulevard, then follow the old Southcenter Boulevard alignment from a connection with the proposed sidewalk /bikeway on the south to Fort Dent Park on the north. No designated park land will be affected by the implementation of this project. A small amount of right -of -way (0.06 acre) will be required for the recommended design at some street and driveway intersections and for rock wall construction in areas of steep cut slopes. Temporary easements will be required for cut slopes and property restoration during construction, and access control is proposed at the new ramp intersection with Interurban Avenue. Depending upon foundation restrictions, environmental approvals, and permit limitations, the project could be under construction in the spring of 1984 and completed in the fall of 1986. Permits and approvals required for this project include: City of Tukwila Shoreline Management Substantial Development Permit State Flood Control Zone Permit State Department of Game and Fisheries Hydraulics Approval FEMA Floodplain Management Permit U.S. Army Corps of Engineers 404 Permit Water Quality Certification, Department of Ecology Extensive coordination between this project and the I -405 HOV construction has been accomplished through numerous interstaff meetings. The WSDOT I -405 HOV design team has been kept up -to -date on the Southcenter Boulevard preliminary design to avoid conflicts and /or duplication of 11 effort on the separate projects. Coordination of this project is also being accomplished with WSDOT in conjunction with the proposed expansion/ relocation of the Christensen Road (T -line) Bridge. The design of the Christensen Greenbelt Trail has been coordinated with WSDOT and the City of Tukwila Department of Parks and Recreation. The landscape architects who designed other portions of the trail are members of the Southcenter Boulevard project team and work closely with the City Parks Department staff to assure continuity. Plans for the Grady Way Bridge Replacement were received from the City of Renton's consultant. The design of Southcenter Boulevard has been integrated into plans for the Grady Way Bridge. Coordination between the Cities of Renton and Tukwila will continue as further work on these two projects proceeds. The total estimated construction cost for the proposed alternative is $6,813,000 in 1982 dollars; estimated right -of -way costs are $40,000. Total project cost is $6,853,000. IMPACTS OF THE PROPOSED ACTION A. Earth Existing Conditions According to the U.S. Soil Conservation Service soil survey of the King County area, a small area of Newberg silt loam, an alluvial soil, is present near the existing intersection of Interurban Avenue and Southcenter Boulevard. With this exception, soils in the rest of the project area are classified as "urban." This classification is interpreted to mean that there has been so much excavation, filling, and other general soil movement in the project vicinity that the soils in the area cannot be accurately 12 identified as any particular soils series or complex. The survey notes that the Green River Valley fill generally ranges from 3 to 12 feet deep and ranges in composition from gravelly sandy loam to gravelly loam. The topography of the project area varies greatly. At its intersection with 62nd Avenue S., Southcenter Boulevard has an elevation of approxi- mately 60 feet above sea level. Eastward, the roadway slopes down gradually to about 30 feet above sea level at its intersection with 65th Avenue S. before rising to about 44 feet above sea level just west of the Green River, where the existing northward curve begins. Following the bend of the river to the northeast, Southcenter Boulevard varies slightly in elevation before dropping to a level of about 35 feet above sea level at its intersection with Interurban Avenue. Just north of the roadway, between 62nd Avenue S. and the Green River, a steep bluff rises to a height of about 90 feet. South of the roadway, the land slopes down sharply to I -405, which has elevations ranging from about 25 to 30 feet in this area. East of the Green River, I -405 (with embankment elevations of 44 to 50 feet) is higher than the adjacent land, which lies approximately 24 to 28 feet above sea level. Environmental Impacts In constructing the project, soils will be disrupted and displaced. Road widening and storm drain installation along Southcenter Boulevard between 62nd Avenue S. and the Green River will require excavation, compaction, and overcovering of the soil. Fill will be needed for approaches to the two bridges over the Green River, for the realigned Southcenter Boulevard east of the river, and for the planned northward extension of the existing I -405 southbound on /off ramps. Embankments will be as high as 30 feet, altering the local topography. Some localized deep borings may be necessary for pier supports to elevate the I -405 ramps above the realigned Southcenter Boulevard. 13 Approximately 14,000 cubic yards of soils will be excavated, and about 34,000 cubic yards of fill will be required. Roadway widening and realignment and I -405 ramp extensions will add approximately 3.5 acres of impervious surfacing to the area. During site preparation and construction activities, the presence of uncovered soils and stockpiled fill will increase the potential for erosion. Mitigating Measures Prior to grading and excavation procedures, the contractor must submit and have approved an-appropriate erosion control . plan to mitigate the potential for erosion. Erosion control procedures generally include dry weather construction, covering of exposed slopes, rapid revegetation, temporary sediment basins, and filtration devices (i.e., straw bales, filter fabric). A temporary siltation fence will be required downstream of the construction areas to reduce the potential for turbidity and off -site deposition of sediment in the event of storm runoff during construction. Inspectors will be instructed to make sure the erosion control plan is instituted and effective. B. Air Existing Conditions National ambient air quality standards have been established to protect the public from air pollutants discharged from various sources (i.e., factories, autos). Of significance to the present and future usage of Southcenter Boulevard project are motor vehicle emissions that contribute carbon monoxide (C0), oxides of nitrogen (N0x) and hydrocarbons (HC) to the atmosphere. These pollutants may concentrate under stagnant weather 14 conditions and exceed health standards. They may also chemically react under the influence of sunlight to form photochemical oxidants (smog) that can be harmful to human health, vegetation, and property. Also of significance to this project, especially during construction, is the generation of particulates (microscopic particles) which suspend in the atmosphere and impose visibility and health problems. Air quality in Tukwila falls under the jurisdiction of the Puget Sound Air Pollution Control Agency (PSAPCA). By law, the standards set by any subfederal jurisdiction cannot be less stringent than the national standards. The standards adopted by the PSAPCA are identical to the national standards, with the exception that additional standards have been promulgated for sulfur dioxides. PSAPCA records indicate that particulate levels in the Tukwila area have been increasing since 1975 and occasionally. exceed State standards. Carbon monoxide is the only air pollutant that can be accurately quantified and predicted on a small -scale basis with existing technology and modeling programs. There was no CO monitoring data available from any federal, state, local, or private agency that was pertinent to the project area; therefore, current air quality conditions relative to CO standards are unknown. Existing air quality in the project area is affected largely by general urbanization and vehicular travel in the Tukwila region. The proposed site is shown on maps from the State Implementation Plan as being within the boundaries of nonattainment areas for carbon monoxide and photochemical oxidants. Environmental Impacts Construction activities will generate dust and other suspended particulates, which may result in short -term violations of air quality standards. Emissions from construction equipment and paving operations may also result in short -term air quality and odor impacts. 15 An air quality analysis to determine the potential long -term impacts of this project was conducted by the Washington State Department of Transportation and is provided as Appendix B. Although no specific micro - scale analysis was performed for this project, a comparative analysis was conducted to relate this project to microscale findings for SR -515 in nearby Renton. In that study, all of the build conditions predict CO values less than the corresponding no -build alternative. Similar conclusions were drawn for this project. Therefore, it is believed that the improved traffic flow, increased travel speeds, and reduced congestion and queueing resulting from construction of the new facility will be beneficial for air quality on a long -term basis. Some air quality-impacts from increased traffic usage of the new facility can be expected, but as previously stated, these will be less than a no -build alternative. Most air quality degradation in the mesoscale region will continue to be related to vehicles using I -405, SR -181, and other nearby roads and parking facilities (Longacres race track, Southcenter Mall, etc.). The Federal Highway Administration has determined that this project is included in the transportation improvement program for the Puget Sound Council of Governments. Therefore, pursuant to 23 CFR 770, this project conforms to the State Implementation Plan (SIP). Mitigating Measures Watering haul roads and cleaning streets should help reduce construction - related dust. Proper maintenance of construction equipment and minimum idling time will help minimize construction vehicle emissions. No operational plan to mitigate long -term vehicular emission impacts is proposed other than reliance on the State vehicle inspection and maintenance program and the gradual replacement of older vehicles with newer models with better emission controls. 16 C. Water Existing Conditions The Green River is the major water body in the project vicinity and receives all drainage from the project area. According to the State of Washington Water Quality Standards, this portion of the Green River falls into the Class A (excellent) designation. Water quality of this class shall meet or exceed the requirements for all or substantially all uses, including water supply, wildlife habitat, recreation, commerce, and fish production. There are established water quality criteria for Class A waters which should not be violated. The Municipality of Metropolitan Seattle (Metro) regularly samples the water quality of the Green River at differe n locations along the water course within Metro's jurisdictional boundaries. Data collected at the Interurban Avenue crossing of the Green River was reviewed in an effort to evaluate the existing water quality conditions and compare the existing values to State standards. From the 50 sampling dates over the 1980 -81 period, the following determinations were made: 1. In the project area, the Green River exceeds the standards for fecal coliform organisms. 2. On one occasion during that two -year period, the river exceeded the desirable limit of 18° C for temperature. The dissolved oxygen level dropped below the standard of 8.0 mg on this same occasion. 3. Turbidity standards are occasionally exceeded. High turbidity tends to coincide with periods of high suspended solids. Other parameters, including nutrients and heavy metals, for which the Green River is tested often exceed the recommended limits considered beneficial for freshwater aquatic life. 17 A U.S. Geological Survey flow recording station is also located on the Green River in the vicinity of the project area. The latest year of record is 1979. During that year, the maximum flow recorded was 6,490 cfs, with a minimum flow of 250 cfs and mean of 1,193 cfs. The maximum flow ever recorded was 13,200 cfs in November of 1959. According to the King County Surface Water Management Division, the 100 -year flood discharge is estimated to be 12,000 cfs. The 12,000 cfs river flow is controlled by discharge of the Howard Hanson Dam and includes the future maximum P -1 channel pumping capacity, at such time as this facility is placed in service. Environmental Impacts The recommended alternative will result in the formation of approximately 3.5 acres of additional impervious surface area. During the 100 -year frequency storm, this surface area would result in an additional runoff volume of 2.5 cfs. This volume was calculated by using the formula Q = CiA = 0.90 (0.80)(3.5) .= 2.5 cfs, where: Q = runoff volume (cfs) C = runoff coefficient (0.90) i = intensity in inches /hour (0.80 for 100 -year storm, 1 hour duration) A = area in acres (3.50) The modified Southcenter Boulevard alignment, new bridges, and new ramps will require some changes in the existing drainage structures, but drainage patterns will remain basically the same. The total additional 2.5 cfs for the above described storm event will enter the river as fractionated flow from various discharge points, but all will enter near the new Southcenter Boulevard crossing. 18 Since the river has an estimated discharge of 12,000 cfs at this location during the 100 -year occurrence, the small amount of additional runoff does not merit concern. When major storms occur in the region, the Green River flow is allowed to increase by the manual control of outflow through the Howard Hanson Dam. Stormwater discharge to the river must occur prior to the time that rise in water level reaches the Tukwila area or gravity discharge into the river will not take place, backing up stormwater into drains, surface drainage channels, and streets. Therefore, in the project area east of Christensen Road, no stormwater detention presently exists nor is any proposed to minimize the time required for runoff to enter the Green River. Storm runoff west of this area will continue to be discharged into the existing detention basing where some physical treatment occurs. The new impervious surface area will collect some additional atmospheric and automobile - generated pollutants that will be washed into the river during storm events. • Again, considering the volume of additional runoff and the river volume during rainstorms, the pollutant contributions are not considered to have any significant water quality impacts. Fill necessary to construct the new bridge embankments will be placed in the Green River floodplain. Although the project will result in the loss of 0.25 acre of the floodplain fringe area, no construction will take place in the floodway and no impact on the flow of floodwaters is expected. During construction, the fill required to construct new embankments as well as spoils piles from excavation will be subject to erosion. If not controlled, eroded soil will enter the waterway and add to the turbidity and suspended solids problems that now occur during many rainstorms. Oil, hydraulic fluids, fresh concrete, and other materials may also enter the river during construction activities. No groundwater impacts are anticipated. 19 Mitigation Measures A plan of established practices for controlling erosion and preventing construction equipment pollutants from entering the Green River will be required in the contract documents. A number of these practices are speci- fied under "Mitigation Measures" in Section A, Earth, of this document. A good street cleaning and maintenance program will help reduce the potential for water quality impacts from stormwater after the new facility is in operation. D. Flora Existing Conditions The project corridor can be divided into two distinct segments, each of which are represented by different vegetation habitats. The western half of the project corridor consists of Southcenter Boulevard between 62nd Avenue S. and 68th Avenue S. (Christensen Road). This portion of the corridor has plant life that can be considered "roadside" habitat. A portion of the flora on the north side of the roadway in this area is composed of lawn and landscaping plants, some of which are poorly maintained. Trees found on the north side of the roadway include Big Leaf Maple, Oregon Ash, Red Alder, Pacific Willow, Black Cottonwood, Mountain Ash, Hawthorne, Western Holly, and Black Locust, with understory vegetation consisting primarily of trailing blackberry, horsetail fern, and various species of grasses. Most of the vegetation on the south side of Southcenter Boulevard along the western section of the roadway consists of Big Leaf Maple, Oregon Ash, and Red Alder trees. These trees border the right -of -way and persist on the steep hillside that slopes downhill toward I -405. The understory vegetation is much the same as along the north roadway border. These trees are periodically trimmed to prevent them from becoming an obstruction to vehicles traveling east on Southcenter Boulevard. 20 The eastern portion of the project area is represented by typical Northwest riparian vegetation. Trees covering the left bank of the river include Big Leaf Maple, Red Alder, Pacific Willow, and Black Cottonwood. The right bank is mostly covered by blackberry vines and thick grasses but also has scattered groupings of trees of the same species as previously described for the left bank. A large section of grassy floodplain lies adjacent to the right bank of the river. It is bordered on the other two sides by roadway -- Interurban Avenue on one side and I -405 on the other. This area is presently an unmaintained grass field scattered with a variety of trees and shrubs. Some of the plants are not native to the Northwest and were likely introduced by farmers who settled the area. Introduced species observed in this area include Horse Chestnut, Rybergs Cottonwood, and Red Maple. Other trees include some very old growth Big Leaf Maple and Black Cottonwood, as well as Black Locust, Oregon Ash, and False Arborvitae. Although the area is a floodplain, it does not support wetland vegetation. Its dryness is reflected by the remnants of an irrigation system in the field described above. However, a small patch of cattails was observed in a depression at the end of one drainage culvert. The slopes of the existing I -405 southbound on /off ramps are vegetated with a variety of the broom plant. The highway right -of -way east of Interurban Avenue is a grassy area bordered by Poplar, Cottonwood, and Silver Maple trees. A vegetation map of the area is provided in Figure 4a. Environmental Impacts A total area of approximately 4.5 vegetated acres will be cleared and grubbed to build the preferred alternative. Most of the land cleared of vegetation will be paved or covered with overburden to establish the new alignment for Southcenter Boulevard, change the I -405 ramps, and create the widened portion of the existing roadway. Some will be cleared temporarily to facilitate the movement and storage of construction materials and equipment, but will be revegetated upon completion of the project. 21 Trees and plantings along the existing two -lane roadway west of 68th Avenue S. will be removed from both the north and south side of the street, but the change will be more physically evident on the north side. Because of the installation of drainage structures and retaining walls to construct a sidewalk, vegetation removal will'be more of a permanent change on the north side. Even where clearing is required on the south side, a strip of vegetation will still separate the new roadway from the I -405 right -of -way. The major vegetation loss will be the trees and plants which will be removed along the river banks and in the floodplain in order to construct the bridges for the new Southcenter Boulevard alignment and I -405 ramps. This includes some old growth plants and some exotics that cannot be readily replaced. No land currently used for agricultural purposes will be utilized for this project. With the exception of an approximately five - square -foot drainage area that supports a group of cattails, no established wetland will be affected by this project. No rare or threatened plant species are known to exist in the project area. Mitigating Measures All exposed soil areas will be revegetated with rapid - growing grass upon completion of construction, later to be replaced with landscape plants, where appropriate. A landscape plan has been developed for the street and trail sections utilizing both indigenous and introduced species of plants that will not only provide protection against erosion but also attract wildlife and add beauty to the area upon maturity. Areas of revegetation are also shown in Figure 4a. 22 E. Fauna Existing Conditions Both the existing roadside habitat and riparian habitat described in the flora section of this document are capable of supporting a variety of birds, small mammals, and reptiles. A list of mammals and birds sighted in the Lower Green River Watershed that can reasonably be expected to occur in the vicinity is provided in Appendix A. Because of the present developed nature of the project area, only those organisms that can readily adjust to human encroachment can be expected to utilize the existing habitat. For example, members of the rodent family, oppossum, and raccoon may be found in the region, but it is unlikely that mink, bobcat, or fox would be sighted. However, rare visits by any of those listed are possible. Most birdlife in the project area is likely to consist of common songbirds or those species that require the unique elements of the river habitat for survival (i.e., bank swallows). Waterfowl listed would generally be limited to seasonal migratory visits. Fish species in the Green River are also listed in Appendix A. Fourteen types of fish are known to inhabit the river in the project vicinity, including several anadromous species. Impacts As described in the "Flora" section, approximately 4.5 acres of vegetation will be lost by implementation of the preferred alternative. The removal of this plantlife will result in the displacement and /or destruction of many of the animals that utilize this flora for their habitat. Mature trees that provide nesting, perching, and food sources for birds will be lost. Placement and compaction of fill material will eliminate food sources and burrows of many small mammals and reptiles. 23 During construction, when earth from excavation and fill placement is unstable, erosion during rainstorms could result in a reduction in water quality that might be harmful to fish and other aquatic organisms. The loss of riparian vegetation reduces food sources and natural shade to the river. No rare or endangered species will be affected by this project. Mitigating Measures Revegetation of exposed areas and permanent landscaping will provide some compensation for lost habitat. Mitigation measures discussed in the "Earth" and "Water Quality" sections will help prevent erosion and reduce impacts to fish species. F. Noise Existing Conditions The project area is parallel to I -405 and can be considered part of the I -405 corridor. In the the project corridor, sound originating from motor vehicles is the major source of noise, and is dominated by traffic noise from I -405. The Washington State Department of Transportation conducted a noise assessment of the project area, which included the determination of existing noise levels; identification of land use and specific establishments that have a particular sensitivity to noise; and prediction of future noise levels, including contributions resulting from implementation of the proposed project. This assessment is provided as Appendix. C. Existing noise levels were measured at four locations as indicated in the following table. Noise Measured Sites 30 feet north of Southcenter Boulevard centerline, west of 65th Street' Private driveway 140 feet north of Southcenter Boulevard, opposite 68th Street "T" 45 feet farther back on the same driveway Southeast quadrant of Southcenter Boulevard /Interurban Avenue intersection, 100 feet from both streets Leq* Time and Date (dBA) 10:30 a.m. 71 9/3/82 9:45 a.m. 11/22/82 9 :30 a.m. 11/22/82 9 :45 a.m. 9/3/82 * Noise measurements were made with a Metrosonics, Inc. sound level meter which averages sound intensity over the measurement period giving a noise equivalent (Leq) level over time. Noise levels are reported as decibels on a weighted scale (dBA). 67 66 67 These stations where recordings were made are considered representative of the various conditions along the entire project route. Based on proximity to I -405, these noise measurements also correlate well with readings taken by WSDOT on December 8, 1981 approximately three - quarters of a mile east of the intersection of Interurban Avenue and Southcenter Boulevard. On that date, during afternoon peak hour, Leq values of 74 dBA and 67 dBA were registered at approximately 100 feet and 225 feet, respectively, from the nearest I -405 lane. Existing noise contours are plotted on the figures provided in Appendix C. In the area where construction would take place, the nearest occupied structure is a commercial office building, located approximately 30 feet from the existing Southcenter Boulevard roadway. According to the noise assessment, a private residence located on the bluff north of Southcenter Boulevard near 68th Avenue S. already exceeds exterior design noise levels recommended by the Federal Highway Administration. 25 Other business offices, public buildings, and residences are located at a sufficient distance from I -405 to drop below the FHWA noise criteria. Environmental Impacts Noise prediction models utilizing projected traffic counts, roadway geometry, and other pertinent data were developed for the no -build condition as well as for each alternative. Noise contour maps of these projected conditions are provided in the appendix. According to the analysis, the implementation of any of the proposed alternatives should have no significant impact in the project corridor. Normal traffic growth in the area will result in approximately 1 dBA increase in noise by 1990 with a no -build alternative (Alternative 1). All of the build alternatives (2, 3A, 3B, and 4) would have an identical effect in the corridor sensitive areas; that is, an additional 1 dBA rise above the no -build condition. No sites will be above the guideline noise levels, except the home opposite 68th Street, which already exceeds design criteria. As stated, implementation of the project will only increase Leq values at these receptors by 1 dBA. Some noise impacts from construction are expected to occur. According to the list contained in "Noise from Construction Equipment and Operations, Building Equipment, and Home Appliances," issued by the U.S. EPA, most construction equipment likely to be used on the project produces noise levels ranging from 79 to 91 dBA when recorded 50 feet from the source. Pile drivers are one of the noisier types of equipment, with sound levels at about 101 dBA when measured from a distance of 50 feet. Temporary noise impacts to the commercial property close to Southcenter Boulevard would arise primarily from equipment used to widen the roadway. Because of the proximity of the building, intermittent noise levels received by this property during the widening phase of project construction could sometimes be in the range of 91 dBA. 26 Supports for the new bridges over the Green River may be pile driven. However, greater distances (at least 200 feet) would separate developed properties from pile driver operations. The noise impact expected at the commercial building from this particular source would be reduced to approximately the level of •impact from other project equipment. During construction of the Southcenter Boulevard bridge over the Green River, bicyclists and pedestrians near the existing northern terminus of the Christensen Greenbelt Trail would be subject to elevated noise levels arising from the use of a pile driver and other equipment. As a result, the attractiveness of this part of the trail may be temporarily reduced for its users. Some vibration from construction equipment will also be felt by pedestrians, but it is not expected to have a significant effect on local homes or business. Mitigating Measures A number of measures can be taken to reduce potential project noise impacts during construction, including: 1. Limit the use of equipment that generates high noise levels to normal working hours (8 :00 a.m. to 5 :00 p.m.). 2. Use modern equipment that is designed or properly muffled to reduce noise. 3. Construct temporary noise barriers around pneumatic equipment or other high noise generators. No permanent noise protection is planned for installation as an element of this project. However, the City of Tukwila may provide potential builders in the project corridor with noise contour maps developed for this 27 project. These maps may aid the builder with design and layout of new buildings on the vacant lands in the project corridor in order to avoid future noise problems. Based on noise contours, the developer may construct buildings in quieter areas, orient the structure to face windows away from traffic, use parking and landscape areas for buffer zones, or take other measures, including construction of noise barriers. G. Light and Glare Existing Conditions Street lighting is currently provided only where Southcenter Boulevard intersects other streets: 62nd Avenue S., 65th Avenue S., 68th Avenue S., and Interurban Avenue. The luminaires provide lighting for pedestrians at the existing intersections. Some light from luminaires along I -405 may contribute minimally to the existing lighting level along Southcenter Boulevard. Headlights on vehicles traveling on Southcenter Boulevard provide the majority of available lighting during the evening and nighttime hours. Impacts Additional traffic expected to use the new roadway will increase the amount of light and glare from headlights during the evening and nighttime. The continuous illumination system along Southcenter Boulevard required by development of a full length left -turn pocket will provide a minimum design light level of 0.9 foot candles. The new system will utilize energy efficient high pressure sodium vapor lamps. Mitigating Measures The new illumination system will direct light where needed on the roadway surface and the proposed sidewalk by use of reflectors and refractors. Post- construction landscaping will also help prevent light from luminaires and vehicles from being transmitted to other areas. H. Land Use Existing Conditions Land use to the north of Southcenter Boulevard is a mixture of single - family residences, multifamily residences, and commercial offices. Most of the hillside north of Southcenter Boulevard between 68th Avenue S. and Interurban Avenue is undeveloped. A large portion of that is designated park land (Tukwila Park). The area between Southcenter Boulevard south to Tukwila Parkway is owned by the State as part of the I -405 right -of -way. The existing comprehensive land use plan designates the area just north of Southcenter Boulevard for office development. The State -owned property is undesignated. The project is consistent with the transportation objectives and policies of Tukwila's Comprehensive Land Use Policy plan and the 1983 -1988 Six -Year Transportation Improvement Program. Impacts The proposed project will improve access and increase the capacity of the roadway system. This may accelerate the development of currently undeveloped land or the redevelopment of currently underutilized land. A total of approximately 2,600 square feet of land designated for office use will be acquired for road right -of -way. 29 During construction, temporary detours and other construction - related activities may inconvenience local residents and employees of local businesses. These inconveniences will last throughout the construction phase of the project, but access should be improved after construction. No disruption of local commercial operations is anticipated during the construction or as a direct result of construction. The project will not require the relocation of any residences or businesses, nor will it impact any minority concerns or low- income neighborhoods. Mitigating Measures Proper signing and, if necessary, advance notice of temporary road closures, will be undertaken during construction to minimize neighborhood disruption. I. Natural Resources Existing Conditions Natural resources in the project area are limited. There are no energy sources, mineral deposits, marketable timber, or other major resources that have been identified in the project area. The Green River is considered the most valuable natural resource in the project corridor. Impacts Materials and fuels used for construction of the new facilities will add to the depletion of natural resources. Materials include cement concrete, asphalt concrete, reinforcing steel, gravel, and other general construction materials. The estimated fuel and material consumption has been converted to equal 112,000 million BTU's of energy. 30 No impacts to the resource value of the Green River are.anticipated. Mitigating Measures See "Energy." J. Risk of Upset Existing Conditions 1 -405 is the principal travelway in the project corridor. Therefore, trucks carrying shipments of hazardous materials would likely use I -405 rather than Southcenter Boulevard. Other than normal traffic hazards, there is no known source of explosion or hazardous substance release related to the present use of this facility. Impacts The new roadway width, improved alignment, illumination, and signals should increase safety and reduce the risk of upset. No special design features are being incorporated into the project to contend with hazardous substance release. During construction, the risk of upset may be increased due to equipment fueling or other operations that pose a certain risk not normally associated with regular roadway use. Mitigating Measures The contractor should follow the necessary safety precautions when handling hazardous or flammable materials. 31 The Tukwila Fire Department has a hazardous materials response team that reacts quickly to contain accidentally released materials, including acids, radioactive materials, and petroleum product spills. The Tukwila Fire Department is also playing a leading role in forming a cooperative hazardous materials response team with other South King County communities. K. Population Existing Conditions The approximate population of the city of Tukwila was 3,600 in 1980 according to the 1980 U.S. census of population and housing. This is a 2 percent increase in population since 1970. During the same time period, King County population has grown 9.5 percent. Projections made by the Puget Sound Council of Governments for the Tukwila area indicate an increase of 12 percent, to just over 4,000 in 1990. Impacts The improved access to employment and residential areas may attract a minimal number of people who would otherwise locate elsewhere. Mitigating Measures None are proposed. L. Housing Existing Conditions The 1980 housing count for the city of Tukwila indicated a total of 1,940 dwelling units. This is a 16 percent increase over the 1970 housing total. During the same time period, the number of dwelling units in King County grew by 24 percent. Projections for 1990 made by PSCOG indicate a growth of 29 percent over 1980 totals for the city of Tukwila. This would result in 2,500 dwelling units in 1990. Impacts A minimal increase in housing demand may result from construction of this project due to a minimal increase in population. Mitigating Measures None are proposed. M. Transportation /Circulation Existing Conditions Southcenter Boulevard is an important east /west roadway that serves as an alternative to a heavily congested section of I -405 for trips between Renton and Tukwila. It is currently a narrow, curving two -lane road with unpaved shoulders and open drainage. West of 62nd Avenue S., the street widens to five lanes with curb and gutter, sidewalk, and closed drainage. East of the project, Grady Way is being widened to five lanes with curb, gutter, and sidewalk. Southcenter Boulevard curves north along the west side of the Green River, intersecting Interurban Avenue approximately 600 feet north of the intersection of Grady Way and Interurban Avenue. The resulting offset between Southcenter Boulevard and Grady Way requires that east /west traffic make a weaving movement between the two intersections. There is limited left -turn storage on Interurban Avenue, which frequently overflows into the through lanes during peak hours. Traffic signals are currently located at the intersection of 61st Avenue S. and Southcenter Boulevard, just west of the project at the Interurban Avenue /Southcenter Boulevard intersection and at the Interurban Avenue /Grady Way intersection. 33 Geometry along the existing roadway is poor, with a series of short radius, horizontal reverse curves connected by short, straight segments. Sight distance is limited due to the adjacent topography and the roadway alignment. The Green River and the I- 405 /SR -181 interchange ramps are major obstacles to improving the alignment for this section of Southcenter Boulevard. The present alignment and narrow roadway increase travel time and congestion in the corridor, which reduces the effectiveness of Southcenter Boulevard /Grady Way as an alternative east /west route to I -405. Average daily traffic volumes were counted in the project vicinity in 1979, 1980, and 1981, then factored to a common year and balanced for the entire system using both computer and manual methods. The estimated 1981 average weekday traffic volumes are shown in Figure 5. The total number of accidents within the project limits for the three -year period 1979 -1981 is 63, or an average of 21 accidents per year. Table 1 summarizes the accidents by type and severity for those years. Property damage accidents are predominately rear -end type accidents generally caused by driver.inattention. Injury accidents result from a driver losing control of his vehicle, usually on the narrow, winding section of roadway between Interurban Avenue and 68th Avenue S. According to current traffic counts along I -405 between Tukwila and Renton, that segment of freeway is operating at level of service E during peak hours. Travel speed drops to less than 30 mph, with long delays for traffic attempting to enter the traffic stream from entrance ramps. The only alternative route through the corridor is Southcenter Boulevard /Grady Way. The poor alignment and narrow roadway on that route prevent it from providing efficient relief to I -405. The existing street system within the study area, particularly along SR -181, exhibits considerable operational problems. Through traffic from Grady Way to Southcenter Boulevard must turn right onto SR -181 and then left at the next intersection onto Southcenter Boulevard. Existing data 34 TABLE 1 ACCIDENT HISTORY SOUTHCENTER BOULEVARD From 62nd Avenue S. to Interurban Avenue and Grady Way 1979 -1981 ACCIDENTS Property Damage Only Injury Total* COLLISION TYPE 1979 -1981 1979 -1981 1979 -1981 Rear -end 15 1 16 Right -angle 1 0 1 Left -turn 7 4 11 Right -turn 5 3 8 Side -swipe 9 0 9 Head -on 1 0 1 Pedestrian 0 1 1 Out of control 6 10 16 Total 44 19 63 * There were no fatalities for these three years. 35 indicate that this, as well as the reverse trip, is a high - volume movement, particularly during the p.m. peak hour. These large turn volumes cause considerable congestion. The SR- 181 /Grady Way intersection currently operates at level of service D -E. The Fort Dent Park /SR -181 intersection is at level of service B, and the I =405 northbound ramp /SR -181 intersection is at level of service C. Although level of service calculations would indicate that this section of SR -181 would operate reasonably well, the high volume of left turns onto Grady Way causes considerable congestion. Left -turn storage is not adequate to handle the volume and cannot be lengthened due to the proximity of the two intersections. Vehicles back onto the through lanes, restricting traffic. Since these intersections are quite close together, the backups can actually extend into the preceding intersection, blocking traffic there as well. The operation of the section more closely resembles the level of service at the worst intersection, that being level D -E. Metro Transit currently operates 14 routes that serve Tukwila, totaling approximately 320 trips per day, all of which either traverse or intersect Southcenter Boulevard. Most of the routes operate peak hour only and only four routes operate on weekends. They connect Tukwila with the major activity areas in the region: the Seattle central business district, Bellevue, Renton, Kent, and the Duwamish Valley. There are two major trail /sidewalk routes within the Southcenter Boulevard project: an east -west sidewalk /bikeway connecting Renton and Tukwila; and a north -south extension of the Christensen Greenbelt Trail. Impacts Traffic volume between 1981 and 1990 is expected to increase considerably in the Tukwila area. The Tukwila Micro -Model Study, completed by Entranco Engineers in 1981, forecast a growth of 33 to 46 percent in vehicle trip ends over the ten -year period between 1980 and 1990 for the commercial- industrial area. The results of that modeling effort (which 36 included a number of land use and roadway alternatives) and•the existing traffic counts were used to evaluate the various alternatives for Southcenter Boulevard using 1990 as a design year. Some differences are expected to occur if Southcenter Boulevard is improved. Figures 6 and 7 show 1990 average daily traffic for the no -build alternative and the proposed project. Increases in traffic are expected to occur on Southcenter Boulevard with the realignment alternative attracting 3,000 to 7,000 more vehicles than the no -build alternative. Corresponding decreases in traffic volumes are expected on I -405. Volumes on Grady Way would increase by about 2,000, with volume on 68th Avenue S. increasing by 4,700. Other changes in traffic should be of lesser significance. The 1990 approach volumes and existing turning movement counts were used to generate 1990 p.m. peak hour turning movements. These were then used to calculate level of service for the three intersections - -Fort Dent Park /SR -181, Grady Way /SR -181, and I -405 northbound ramp /SR -181. Table 2 shows the anticipated 1990 level of service for the various alternatives. Only alternatives 3B and 4.provide level of service D or better at the Fort Dent Park /SR -181 intersection; only alternatives 3A and 4 provide level of service D or better at the Grady Way /SR -181 intersection, while none of the alternatives provide better than level of service E at the I -405 northbound ramp /SR -181 intersection ( "Alternatives Considered," for a description of Alternatives 3A and 3B). The latter intersection needs a separate right -turn lane for southbound traffic on SR -181 to improve access to I -405 northbound. Construction of this lane is outside the scope of this project, and was therefore not considered in any of the alternatives. As previously stated, current storage length for left turns from SR -181 southbound onto Grady Way eastbound is not adequate to handle the p.m. peak hour demand. On some signal cycles, left turning traffic backs up onto the through lanes, blocking that movement. In some cases, it may backup through the present Southcenter Boulevard /Fort Dent Park /Interurban Avenue intersection, severely restricting traffic flow. The increase in 37 Alternative 1. No Build 2. Widen Existing 3A. High Level Bridge, Southcenter Boulevard Ramp 3B. High Level Bridge, Grady Way Ramp TABLE 2 1990 LEVEL OF SERVICE I -405 Northbound Fort Dent Park Grady Way/ Ramp at at SR -181 at SR -181 SR -181* E F E B F F D New Alignment, At -Grade Intersection° F E -F E -F F E * This intersection is outside the limits of this project. In order to achieve an acceptable level of service, a right -turn lane should be added on the north approach. ° Recommended alternative. 40 factors (level of service). Table 3 summarizes the findings. Under the No Build Alternative (Alternative 1), accidents are estimated to double to 42 accidents versus the 1979 -81 annual average of 21 accidents. Considerable improvement for 1990 would obtain for the build alternatives, with Alternative 4 showing the best performance at 21 accidents for 1990, or 50 percent of the projected value for the No Build Alternative. 41 1 No Build* 2 Widen Existing TABLE 3 1990 TRAFFIC ACCIDENTS ESTIMATE INDEX ANNUAL (Alternative 1 = ACCIDENTS 1.00) 42 30 1.00 0.71 3A High -Level Bridge, Southcenter 26 0.62 Boulevard Ramp 3B High -Level Bridge, Grady Way Ramp 24 0.57 4 New Alignment, At -Grade Intersection 21 0.50 * 1979 -81 three -year average for the existing condition is 21 accidents per year. 42 r_ C f L I_ L The proposed trail system is approximately 0.3 mile in 'length and will extend the Christensen Greenbelt Trail from the intersection of Tukwila Parkway and Christensen Road/ Christensen Greenbelt Park northward along the Green River. It will pass under I -405 and Southcenter Boulevard, then follow the old Southcenter Boulevard alignment from a connection with the proposed sidewalk /bikeway on the south to Fort Dent Park on the north. The development of this trail will provide a valuable link in the City of Tukwila's trail system, as well as providing an excellent recreation resource for the people living within the greater Green River Valley. The trail will connect with the sidewalk system adjacent to Southcenter Boulevard, with the existing Christensen Greenbelt Trail and the pedestrian circulation system within Fort Dent Park. It will provide a broad range of recreational opportunities and a safe transportation system for pedestrians and bicyclists that does not exist at the present time. The proposed project also includes an eight -foot sidewalk /bikeway on the north side. It will provide a continuous facility for pedestrians and bicyclists between Renton and Tukwila. The project will incorporate features such as turn channelization, signalization, sidwalks, and illumination that will facilitate movement of Metro Transit buses and loading and unloading of passengers. There will be no effect on existing parking facilities nor will a demand for new parking be created. There will be no effect on waterborne, rail, or air traffic. Mitigating Measures A new signal with advanced capabilities will be installed at the intersection of Grady Way and Interurban Avenue. The existing State -owned traffic signal at the Interurban Avenue /Fort Dent Park intersection will 43 require only minor revisions. Another signal will be installed at the intersection of Southcenter Boulevard and 68th Avenue S. to improve traffic flow and provide safe pedestrian movement. Reference was made earlier to completion of the Grady Way Bridge replacement located at the east terminus of the Southcenter Boulevard project. It will provide a five -lane section from Interurban Avenue into Renton. The programmed completion date for the bridge replacement is 1983 -84, which should help mitigate traffic impacts of this project. An additional planned project in the vicinity is construction of high occupancy vehicle (HOV) lanes on I -405. The first phase of the project calls for construction from I -5 in Tukwila to the Renton "S" curves. Programmed for construction in late 1983, the project will provide exclusive lanes for transit, carpools, and vanpools. Although they will provide significant time savings for HOV's during peak hours, they will probably not significantly improve the overall level of service. In conjunction with that project, WSDOT has agreed to participate in replacement of the T -line bridge (68th Avenue S. bridge) with a new four -lane structure. The widened roadway will greatly improve access for the Tukwila commercial- industrial area and adjacent portions of the community. A study of possible alternative alignments is currently under way, with completion anticipated in the fall of 1982. The extension of the Christensen Greenbelt Trail will provide a continuous Class II (separate right -of -way) bicycle facility between S. 180th Street and Fort Dent Park. The proposed sidewalk /bikeway on the north side of Southcenter Boulevard will complete the pedestrian link between Renton and Tukwila. 44 Metro's adopted 1990 plan includes a package of major service improvements in Tukwila aimed at creating a Regional Transit Center in the Southcenter Shopping Center vicinity. This Regional Transit Center will be a transit focal point, and will coordinate transfers between local routes and through routes going to the Seattle CBD and to other activity centers. Increased transit service and revision of existing routes are proposed as part of the 1990 transit plan. The proposed transit improvements are aimed at accommodating a projected 10 percent peak hour mode split by 1990. N. Public Services (1) Fire Service Existing Conditions Fire protection in the area is provided by the Tukwila Fire Department. Two fire stations are located in the immediate vicinity, one at 444 Andover Park East and the other at S. 147th Street and 59th Avenue S. They provide pumpers, aerial ladder trucks, aid car, and support vehicles on a full -time basis. Impacts Completion of the project will decrease response time by decreasing congestion and minimizing the potential for vehicle blockage. During construction, some temporary increase in response time may occur. Mitigating Measures Emergency vehicle pre - emption sensors will be installed at all signalized intersections. 45 (2) Police Protection Existing Conditions Police protection in the area is provided by the City of Tukwila Police Department. The police station is located in City Hall at 6200 Southcenter Boulevard. The force is currently composed of 27 commissioned officers. Impacts Response time will be decreased by completion of the project by decreasing congestion and minimizing the potential for vehicle blockage. During construction,-a temporary increase in response time may occur. Mitigating Measures None. (3) Schools Existing Conditions Tukwila is in South Central School District 406. There are three elementary schools, one junior high school, and one high school in the district. Impacts Travel time will be decreased for school buses routed along Southcenter Boulevard. Pedestrian safety will be improved along the corridor. Mitigating Measures An eight -foot sidewalk /bikeway will be provided along the north side of Southcenter Boulevard which will improve safety for school children. 46 (4) Parks and Recreation Existing Conditions There are several recreational facilities in the vicinity of Southcenter Boulevard. Tukwila Park, on 65th Avenue S. just north of Southcenter Boulevard, is Tukwila's oldest park. There are four tennis courts, a play court, restrooms, picnic tables, trails, playground apparatus, a gazebo, fire pits, and open grass areas nestled among the large fir trees and rhododendrons. Bicentennial Park is a small neighborhood park located at the intersection of Strander Boulevard and Christensen Road. It contains a log cabin, picnic tables, restrooms, and playground apparatus and provides the main parking areas for it and the Christensen Greenbelt Park. The Christensen Greenbelt Park stretches two miles, from S. 180th Street to Tukwila Parkway along the west bank of the Green River. It is a narrow park, often referred to as the Christensen Trail, consisting of an eight -foot wide hard surface bycycle path and a six -foot wide cinder jogging path. Also found along the trail are a fitness course, duck pond, .bicycle racks, and four picnic areas. Fort Dent Park is a part of the King County Parks system. Located just north of Southcenter Boulevard and just east of the Green River, the park is accessed from Interurban Avenue at Southcenter Boulevard. The 50 -acre park has soccer and softball fields, tennis courts, a running track, and picnic areas. The soccer and softball fields are used extensively by King County Parks Department recreation leagues. Major privately owned recreational facilities include Longacres racetrack, located just east of the project site, and Foster Golf Course, located on Interurban Avenue near I -5. Longacres is open from spring until fall, generally on Wednesday- through- Sunday schedule. Foster Golf Course is an 18 -hole golf course open year- round. 47 _Impacts,. 2�477,, ?7 /7/ The project includes an extension of the Christensen Trail from its current northern terminus near Tukwila Parkway to Fort Dent Park. Picnic tables, rest areas, and landscaping will be provided. Some increased maintenance can be expected. Mitigating Measures Extension of the Christensen Trail will improve access to area parks for all residents as well as providing increased park acreage. 0. Energy Existing Conditions The major source of energy consumption is from automobiles consuming gasoline as they traverse the existing roadway. Smaller amounts of diesel fuel are consumed by trucks and buses. Minor amounts of electricity are used by the existing traffic signals and illumination. Impacts During the construction phase, 112,000 million BTU's of energy will be consumed by construction equipment and materials. For 1990, the average weekday vehicle miles of travel (vmt) on the Southcenter Boulevard, Interurban Avenue, Grady Way, and I -405 southbound ramp segments within the project limits will be 13,800, both for the No Build Alternative and for Alternative 2, Improve Existing Facility. The corresponding measures for Alternatives 3A, 3B, and 4 are all approximately 17,200 vmt. The increased vehicle miles of travel (25 percent) for the latter results from the increased traffic volumes from the improved traffic service which Alternatives 3A, 3B, and 4 offer motorists. Allowing for 48 higher traffic flow performance and higher overall operating speeds provided by the latter, total annual fuel consumption for all alternatives should be approximately the same, at 390,000 gallons for 1990. No new energy sources will be required. Mitigating Measures Construction of the project will reduce energy consumption due to decreases in congestion and vehicle miles of travel and increases in travel speed. High pressure sodium vapor lamps will be used in all luminaires. These lamps have a very high efficacy (lumens per watt of power consumed), which results in considerable energy savings. Metro Transit currently operates 14 routes in the project vicinity. Metro's 1990 Transit Plan recommends improved service in the corridor consisting of new routes and increased service on existing routes. The proposed service improvements are aimed at accommodating a projected 10 percent peak hour mode split. Turn lanes and radii, signalization, and channelization improvements will be designed to facilitate the movement of transit vehicles. Metro will benefit by reduced travel time and reduced fuel costs. P. Utilities Existing Conditions Power and telephone lines run parallel to and occasionally cross Southcenter Boulevard. Poles supporting these lines are within the existing street right -of -way. Most of the power poles are located on the south side of the street. 49 Natural gas mains are buried within the Southcenter Boulevard roadbed. A waterline and sanitary sewer line is located under the pavement of the present roadway. Two storm sewers pass under the roadway and carry drainage toward I -405. Impacts Power and telephone lines will be placed underground throughout the project limts. This work will be completed by the respective utility companies at their own expense. Any necessary adjustments to gas mains would be completed by the gas company. Stormwater runoff from Southcenter Boulevard between 62nd Avenue S. and 68th Avenue S. will be collected in new storm drains and continue to be discharged into the existing detention basin to the south through a proposed closed retention /oil separation system. Other utility work will be limited to relocation and adjustment of existing facilities. Domestic water system improvements include relocation of fire hydrants and adjustment of valves and valve chambers. Sanitary sewer improvements include adjustment of manholes to the new street grade. Mitigation Measures Planning and coordination will take place with the respective utility representatives during design and construction to avoid interruption of service to customers and prevent unnecessary project delays. Q. Human Health No negative impacts to human health are anticipated as a direct result of this project. Improved traffic oprations and pedestrian access will provide a safer facility for drivers and pedestrians than presently exists. 50 R. Aesthetics Existing Conditions The existing roadway is a two -lane roadway that parallels I -405 from 62nd Avenue S. to 68th Avenue S. and then turns north along the Green River. Trees border it along the south and east sides. A steep hillside runs along the roadway to the north and west. Views of the Green River are obscured by the border of trees and the elevation difference between the river and the roadway. The area between I -405 and the Green River is an open field with some trees. Other potential views are generally obscured by the I -405 bridge structures, elevation differences, or trees. Impacts The realignment of Southcenter Boulevard and new structures will impose a considerable change to the existing visual elements in the area. Two new crossings of the river will alter the approach angle and view from most of the existing roadways affected by the project, as well as creating a visual impact from neighboring properties. The northerly view of the river from southbound I -405 lanes will especially be affected. Although the initial visual impact will be considerable, over a period of time people will become familiarized with the new facilities and the sense of change felt by most observers will eventually be accepted. Construction of the project will convert a portion of the open area between 1-405 and the Green River to a five -lane roadway. Views from the new roadway will be opened up to the north, particularly from the relocated I -405 southbound ramps. No existing views will be blocked. 51 Mitigating Measures Aesthetics are considered an important part of the structural design for this project. General bridge configuration, piers, railings, walls, etc., will be of lines, textures, and shapes that are considered architecturally pleasing, yet compatible with other structures in the area. Extension of the Christensen Trail will provide views of the Green River, Longacres racetrack, Renton, and Fort Dent Park for pedestrians and bicyclists. Landscaping will be provided in all areas requiring vegetative restoration due to the proposed street and trail construction and its effects on existing vegetation. A concerted effort will be made to utilize indigenous plant materials that will attract birds and other forms of wildlife adjacent to the Green River environs. Also, the selection of plant materials will include the considerations of seasonal color and drought - tolerant plant varieties. The landscape development adjacent to thenatural vegetation areas will be confined to the planting of clover and wildflowers. This landscape treatment will assist in restoring the existing vegetation that will be scarred as a result of trail construction. The total landscape of the trail and roadway would accomplish two things: (1) establish a park /trail atmosphere, and (2) create a compatible environment with adjacent land uses. 52 S. Recreation See "Public Services." T. Archaeological /Historical Existing Conditions The State of Washington Office of Archaeology and Historic Preservation has reviewed available records and noted that the project vicinity has a high potential for occurrence of previously unidentified cultural resources. Based on this review, an architectural /historical survey was made by the University of Washington Office of Public Archaeology. This survey included archival literature review as well as direct surface and subsurface exploration. A report outlining the results of the cultural resources assessment of the project area was submitted by the University of Washington Office of Public Archaeology and is enclosed as Appendix D. The report concurs that the vicinity is rich in cultural resources. However, it basically concludes that no significant cultural resources have been found or are likely to occur in the specific project area. Impacts Since archaeological resources are unlikely to exist in the area, no significant impacts are expected. In addition, the amount of excavation work is limited; therefore, if resources were discovered, little damage would likely occur prior to a proper inventory. No historical sites will be affected by this project. 53 Mitigating Measures Certain precautionary measures should be adopted to ensure against loss of any significant remains that may have escaped detection during the current project assessment. In the unlikely event that artifacts are encountered during construction, further work should be temporarily halted in that vicinity until a professional archaeological evaluation can be made of the need for mitigative efforts. In addition, notification of any such findings should be made to the State's Office of Archaeology and Historic Preservation so that they might coordinate and review possible preservation /recovery alternatives. U. Economic Impacts Existing Conditions As of December 1980, the city of Tuwila contains 1,006 businesses employing 19,174 people. The Southcenter Boulevard project is located on the border between the Tukwila /Interurban and the Southcenter /Andover areas, as definded by the 1980 City of Tukwila Employment Survey. The Tukwila /Interurban area had employment of 1,257 people, while the Southcenter /Andover area had employment of 15,056 people, or 78.5 percent of total employment. Gross floor area of leasable space for 1980 totaled approximately 10,668,000 square feet, with the majority of that (6.9 million square feet) devoted to light industrial uses and warehousing. There were approximately 2 million square feet of retail space and 1.8 million square feet of office space. 54 Impacts By 1990, total gross floor area of leasable space is expected to grow to 12.5 million square feet, or 17 percent more than in 1980. Major increases are expected in office space with an additional 1.8 million square feet to be provided. Employment is expected to increase by 40 percent, to about 26,000 people in 1990. Access improvements provided by this project will help to achieve that projected growth. Construction of the project will improve the local economy by providing jobs for area contractors and sales of materials for local suppliers. The proposed action would not have significant adverse economic impacts on property values, tax revenues, employment, and retail sales, and would not require any commercial displacements. The .06 acre of right -of -way required would not cause an adverse impact. The proposed action would improve access to the unimproved property north of Southcenter Boulevard between 68th Avenue South and Interurban Avenue and would have the effect of increasing property values and tax revenues. Mitigating Measures With the exception of the purchase of .06 acre of right -of -way, there are no mitigation measures necessary for economic impacts. ALTERNATIVES CONSIDERED This section discusses four roadway alternatives to the proposed project: (1) the no -build alternative; (2) improve the existing facility; (3A) build a high -level bridge with access to Interurban Avenue at Fort 55 Dent Park; and (3B) build a high -level bridge with access to Interurban Avenue at Monster Road. Figure 8 shows the alternatives. Alternative 4 shown in that figure is the proposed project. References to traffic and allied performance facets (congestion, accidents, etc.) are in comparison to the proposed project alternative'for 1990 conditions. Alternative 1 - No -Build Description The no -build alternative is a consideration of the effects of not improving the route. If the proposed project is not built, the section of Southcenter Boulevard east of 62nd will remain as a two -lane facility without sidewalks. The portion of Grady Way west of the bridge will be widened to five lanes as part of the Grady Way Bridge project, with no improvement in the alignment. No further improvements would be made to the route. Impacts Less traffic would use Southcenter Boulevard than with the proposed project. I -405 would have higher traffic volumes, and congestion would be greater on both routes as well as on Interurban Avenue. Travel time through the corridor would be higher. Annual traffic accidents would be twice that of the proposed project. Anticipated development in the Tukwila commercial- industrial district (CID) may not occur because of poor access. Traffic hazards would increase. Response time for emergency vehicles would be increased. The Christensen Greenbelt Trail would not be extended, and pedestrian access to Renton would not be improved. A savings of $6.9 million would occur, as opposed to the proposed project; however, this would be offset somewhat by higher costs associated with maintenance and accidents. 56 Conclusion The no- action alternative is not a reasonable alternative for the following reasons: (1) increased congestion; (2) increased traffic hazards; (3) reduced pedestrian and auto access; and (4) decreased pedestrian safety. No action will also limit potential growth in the area due to the problems stated above. Alternative 2 - Improve Existing Facility Description This alternative would maintain the existing alignment but would widen the roadway section to provide five travel lanes on Southcenter Boulevard west of Interurban Avenue and five travel lanes on Grady Way from Interurban Avenue (SR -181) to the Grady Way Bridge. Sidewalks would be provided and some intersection channelization installed. A signal would be installed at the intersection of Southcenter Boulevard and 68th Avenue S. The Christensen Greenbelt Trail would be extended as an eight -foot sidewalk /bikeway adjacent to the travel lanes. Impacts Traffic volumes would be slightly lower on Southcenter Boulevard than for the proposed project, while they would be slightly higher on I -405. The level of congestion would be greater on both routes as well as on Interurban Avenue. Travel time and the number of accidents would be greater than with the proposed project, but less than with a no -build alternative. 58 Some anticipated development in the Tukwila CID may not. occur due to the access constrictions. The Christensen Greenbelt Trail would be extended to Fort Dent Park as an eight -foot sidewalk /bikeway adjacent to the travel lanes. Pedestrian and bicyclist safety would be lower than with the proposed project. Retaining walls may be required between 68th Avenue S. and Interurban Avenue on the northwest side of Southcenter Boulevard. The narrow right -of -way in that area may require acquisition of additional right -of -way to avoid severe impacts on the Green River. The cost in 1982 dollars would be $1.9 million. This is a savings of $5.0 million as compared to the proposed project. This savings would be slightly offset by increased accidents and travel time delay. Conclusion The "improve existing facility" alternative is not believed to be a reasonable alternative for the following reasons: (1) increased traffic congestion; (2) increased impacts on the Green River; and (3) decreased pedestrian safety. The traffic weave and storage problems associated with the intersection at SR- 181.wi1l remain. Alternative 3A - High -Level Bridge with Access to Interurban Avenue at Fort Dent Park Description This alternative would consist of construction of a high -level bridge west from Grady Way to 68th Avenue S. crossing over SR -181, the I -405 southbound on /off ramps, and the Green River. Connection to Interurban Avenue would be made via the existing section of Southcenter Boulevard between 68th Avenue S. and Interurban Avenue. The Grady Way access to Monster Road and Interurban Avenue would be closed. The high -level bridge would consist of four lanes. The existing section of Southcenter Boulevard west of 68th Avenus S. would be widened to five travel lanes, while the 59 section east of 68th Avenue S. would be maintained as a two -lane facility. A traffic signal would be installed at the intersection of Southcenter Boulevard and 68th Avenue S. The Christensen Greenbelt Trail would be extended north under the I -405 bridge and Southcenter Boulevard bridges on an independent alignment. Along 68th Avenue S. it would consist of an eight -foot sidewalk /bikeway adjacent to the existing travel lanes. Impacts The impacts associated with this alternative are similar to the proposed project. The capacity of the roadway would be slightly higher; however, the level of congestion would also be higher due to the indirect access to I -405. The improved access to the Tukwila CID would allow the anticipated growth to occur. Accidents would be slightly higher than for the proposed project. Pedestrian and bicycle safety would be somewhat lower due to the Christensen Greenbelt Trail being adjacent to the travel lanes between 68th Avenue S. and Interurban Avenue. The cost of construction would be $10.6 million in 1982 dollars; this is $3.7 million more than for the proposed.project. Fuel consumption and accident costs would be similar to the proposed project. Conclusion . Alternative 3A is not believed to be a reasonable alternative because of high cost and decreased pedestrian safety. Alternative 3B - High -Level Bridge with Access to Interurban Avenue at Monster Road Description This alternative is similar to alternative 3A. A high -level bridge would be constructed west from Grady Way to 68th Avenue S., crossing over SR -181, the I -405 southbound on /off ramps, and the Green River. Connection 60 to Interurban Avenue would be made via the existing section of Grady Way between Monster Road and Interurban Avenue. The existing section of Southcenter Boulevard between 68th Avenue S. and Interurban Avenue would be closed. The section of Southcenter Boulevard west of 68th Avenue S. would be widened to five travel lanes. The high -level bridge would consist of four travel lanes. Traffic signals would be installed at the intersections of Southcenter Boulevard and 68th Avenue S. and Grady Way and the Interurban Avenue connector. The Christensen Greenbelt Trail would be extended north on an independent alignment, as shown for the proposed project. Impacts The impacts .of this alternative are similar to both the proposed project and Alternative 3A. Congestion would be slightly greater than with the proposed alternative, while capacity would be similar. The number of accidents would be slightly higher and pedestrian /bicycle safety would be similar. The cost of construction in 1982 dollars would be $10.7 million. This is $3.8 million more than for the proposed project. Fuel consumption and accident costs would be similar to the proposed project. Conclusion Alternative 3B is not believed to be a reasonable alternative because of its high cost. COMMENTS AND COORDINATION This action has been under study since October of 1981. The study included traffic analysis and modeling, numerous engineering considerations, review of compatibility with other facilities and plans, and preparation of the appropriate environmental documents. 61 Coordination to date has entailed both written and verbal communication with the appropriate officials representing numerous local, state, and federal agencies, including but not limited to the following: City of Tukwila King County Puget Sound Council of Governments Municipality of Metropolitan Seattle State of Washington Office of Archaeology and Historic Preservation State of Washington Department of Fisheries State of Washington Department of Game State of Washington Department of Transportation U.S. Fish and Wildlife Service U.S. Army Corps of Engineers U.S. Coast Guard Federal Highway Administration Additionally, coordination.of this project is being accomplished with WSDOT in conjunction with the proposed expansion /relocation of the Christensen Road (T -Line) Bridge. The design of the Christensen Greenbelt Trail has been coordinated with WSDOT and the City of Tukwila Department of Parks and Recreation. The landscape architects who designed other portions of the trail are members of the Southcenter Boulevard project team and work closely with the City Parks Department staff to assure continuity. Plans for the Grady Way Bridge Replacement project were received from the City of Renton's consultant. The design of Southcenter Boulevard has been integrated into plans for the Grady Way Bridge. Coordination between the Cities of Renton and Tukwila will continue as further work on these two projects proceeds. Evidence of coordination with some of the officials representing these agencies is attached. 62 December 18, 1981 Paul A. Treman, P.E. Entranco Engineers 1515 - 116th Ave. N.E. Suite 200 King County State or Washington Randy Revelle, County Executive Department of Public Works James W. Guenther, Director 900 King County Administration Building 500 Fourth Avenue Seattle, Washington 98104 (206) 344.2517 4' t. Bellevue, WA. 98004 • � � ,1 �Sr,i C. 0 Re: Southcenter Boulevard Extension, Job No. 82028 -20 Dear Mr. Treman: The following comments are in response to questions from your December 14 letter as numbered: r}, Mar . ' - 1 ) The 100 -year flood elevations are noted on the enclosed map. They are noted in blue figures as M.S.L.Datum. 2) The ordinary high water elevation (.9000 cfs) and (12000 cfs) flood elevation which included the P- Channel pumping are noted in black figures on the enclosed photo -copy of HUD map, 2 of 2, City of Tukwila. 3) Enclosed photo - copies of area from City of Tukwila Floodway and Flood Insurance Rate Maps. 4) Vertical clearance of 6 feet above the 100 -year water surface is re- commended as stated in King County Code 20.50 (Ord, 2281, Surface Water Runoff Drainage Policy 1.10). The City of Tukwila, U.S. Army Corps of Engineers and the State Department of Fisheries should also be addressed for vertical clearances. A State Flood Control Zone Permit shall be required. Also check with the U.S. Coast Guard for their navigation on safety recommendations. 5) I spoke with John Bordon, King County Bridge Engineer, about the two existing bridges. They are not county bridges and we have no vertical datum on these structures. 6) Enclosed application for a State Flood Control Zone Permit. 7) The State Flood Control Zone Permit would be the only review by our Department. Further questions should be directed to Doug Grochow or Meredith Mamanakis of my staff at 344 -3874. Sincerely, G.E. WANNAMAKER, P.E. Development Review Section Surface Water Management Division GEW:DG:dk Encl. -' USE ( .a Qovc GC-Fv, Foe I L, ou. c <3 , Noi loo r«2 EGfv - Fit NEs" y,,,NG )415-4016) iz _ LL -91 pAT 1908 • City of Tukwila 6200 Southcenter Boulevard Tukwila, Washington 98188 Public Works Department 433 -1850 September 20, 1982 re ,•, • :] ; r a Mr. Dennis Neuzil Entranco Engineers E L. 1515 -116th Avenue N.E. Bellevue, Washington 98004 ATTN: Mr: Ed BreschinskiENTRANCO ENGINEERS Dear Mr. Neuzil: Byron G. Sneva, Director Re: Southcenter Boulevard Preliminary Design Report - Project No. M- 1147(5) Attached you will find the Department of Transportation letter of September 14th indicating that the subject project is exempt from the U.S. Coast Guard bridge permit requirements. This information is to be incorporated in your final preliminary enga.neering. design report and environmental assessment documents. Phillip R. Fraser, Senior Engineer xc: Brad Collins, Planning Director file PRF:jt JOHN SPELLMAN Governor STATE OF WASHINGTON DEPARTMENT OF TRANSPORTATION Highway Administration Building • Olympia, Washington 98504 • (2016) 753 -6005 Mr. Byron Sneva Public Works Director 6200 Southcenter Blvd. . Tukwila, WA 98188 September 14, 1982 DUANE BERENTSON Secretary City of Tukwila Southcenter Blvd. M- 1147(5) Dear Mr. Sneva: The FHWA has determined that the Green River is not navigable from the mouth of the Black River to the SR516 Bridge. This project is therefore exempt from the U.S. Coast Guard bridge permit requirements. A copy of this determination is,attached for your information. SAM:ds LRR Attachment cc: Don Hoffman w /attach. Sincerely, S. A. M00I City /County Liaison Engineer r...•nw.,....i•• •vxsi.0 u....w a.w ... • Exemption from U. S. Coast Guard Bridge Permit Requirements - Green River 'Mr. Paul C. Gregson, Division Administrator Olympia, Washington Mr. John Mikesell ' Chief, Bridge Section United States Coast Guard 915 Second Avenue Seattle, Washington 93174 v• • 0 •• • Suite 501 Evergreen Plaza 711 S. Capitol Way Olympia, Washington 98501 August 26, 1982• ..RPP -WA This is to advise•you that FHWA has applied the criteria - established in.-:. 23 USC144(h) to the•section of the Green River from the mouth of the Black River upstream to the SR -516. Bridge. We have found that this stretch -o£•` river is not subject to the ebb and flow of the tide, and'is not used or susceptible to use as a means to transport interstate or foreign commerce. Accordingly, we have determined that the bridges proposed for construction with Federal funds under Title 23 USC under the City of Tukwila's Southcenter Boulevard Project are exempt from U. S. Coast Guard bridge permit requirements. This determination will also apply to future bridge construction projects that may be proposed on this section of the Green River. ' WILLIAM 1. GLOVER By: William J. Glover Environmental Engineer: US. Department of Transportation United States Coast Guard Department of Transportation Federal Highway Administration ATTN: Mr. Paul C. Gregson Division Administrator Suite 501 Evergreen Plaza 711 S. Capitol.. Way Olympia, WA 98501 Gentlemen: Thirteenth Coast RE: Guard District 915 Second Avenue Seattle, WA 98174 Staff Symbol: (oan) Phone: (206) . 442 5864 16591 Serial 427 9 September 1982 Green River, from mouth of Black River to SR 516 Bridge; Coast Guard Bridge Permit determination pursuant to•Surface Transpor- tation Assistance Act of 1978 Your letter, ItPP -WA, of 26 August 1982, advised that a determination has been made pursuant to the Surface Transportation Act of 1978, that Coast Guard Bridge Permits will not be required for bridges constructed with Federal funds under Title 23 USC, across that portion of the Green River between the mouth of the Black River and the SR 516 Bridge. This determination is noted and will be filed for record purposes. The Coast Guard has no further comments at this time. Sincerely, John E. Mikesell Chief, Bridge Section By direction of the District Commander DEPARTMENT OF THE ARMY SEATTLE DISTRICT, CORPS OF .ENGINEERS P.O. BOX C -3755 SEATTLE, WASHINGTON 98124 Brad Collins, Director Tukwila Planning Department 6200 Southcenter Boulevard Tukwila, Washington 98188. Dear Mr. Collins: 28 APR 1982 We have reviewed the Proposed Declaration of Non - Significance and the ac- companying Environmental Checklist for the proposed realignment of South - center Boulevard within the City of Tukwila, Washington, with respect to the U.S. Army Corps of,Engineers' areas of responsibility for flood con- trol, navigation, and regulatory functions. We have the following comments: a. It is not clear from the Environmental Checklist whether the lo- cation of fill will remove significant areas of wetland and /or riparian habitat. This issue is not adequately addressed and should be clarified. It may be pertinent to the final decision on the significance of the proj- ect. As you know, wetlands are ecologically significant areas which help maintain the quality of the human environment in a number of important ways. Seattle District encourages you to consider the use of alternatives which minimize impacts to wetlands. b. It is noted that interior drainage will be altered, thereby in- creasing runoff into the Green River which is already a severe problein in the Green River basin. Drainage patterns resulting from road relocation should be addressed. c. Water quality in the Duwamish River is a key environmental issue. Mitigation of construction - induced pollution should be addressed as well as a long -term means of reducing oils and other surface water contaminants. d. The bridge should be designed to withstand a 100 -year frequency flood. The design should also include free board water surface for drift clearance. e. The enlarged arterial would affect the proposed greenbelt trail. The impacts, such as noise and safety, should be discussed. c NPSEN -PL -ER Brad Collins, Director ■ We appreciate the opportunity to review this checklist and regret that our response was delayed. If you have any questions, please feel free to con- tact Dr. Steven F. Dice, telephone (206) 764 - 3624, of my staff.: ' Sincerely, 2 ►OHN SPELLMAN IGovernor . STATE OF WASHINGTON OFFICE OF ARCHAEOLOGY AND HISTORIC PRESERVATION 111 West Twenty -First Avenue, KL -11 • Olympia, Washington 98504 • (206) 753-401) July 30, 1982 Mr. Ed Berschinski Entranco Engineers 1515 - 116th Ave. N.E., Suite 200 Bellevue, WA 98004 Log Reference: 332- C -KI -02 IACOB THOMAS Director Re: Southcenter Boulevard 62nd Ave.. S. to Grady Way Project #82028 -20 Dear Mr. Berschinski: We have reviewed the materials forwarded to us for the above referenced project. A search of our records, including the National and State Registers of Historic Places and the Washington State Archaeological and Historic Sites Inventories, indicates surveys have been conducted in the general vicinity of the project area. Known site distributions, ethno- historic sources, and /or consultation with others indicates that the project area has high potential for the occurrence of previously uniden- tified cultural resources. Based on the results of our records searches, consultations, and the materials provided for out review, we recommend professional archaeological surveys of the project area be conducted prior to further action. The above comments are based on the information available at the time of this review. Should additional information become available, our as- sessment may be revised. In the event that cultural materials are inadvertently discovered during construction, work in the immediate vicinity should be discontinued and this office notified. Please in- dicate the log reference number noted above in further communications concerning this project. A copy of these comments should be included in subsequent environmental documents. dj Sincerely, „1„4-c_,.. Robert G. Whitlam, Ph.D. Archaeologist r\N‘LA ;sue, City of Tukwila • 6200 Southcenter Boulevard ▪ Tukwila Washington 98188 19 09 TO: FROM: DATE: SUBJECT: Frank Todd, Mayor Mark Caughey Don Williams January 18, 1982 Widening of Southcenter Blvd..- E.C.F. Response!T MEMORANDUM B202.S -Zo The Department.of Parks and Recreation is very interested in the continued development of Southcenter Blvd., specifically the sidewalk's width and location. We look at the sidewalk sections as additional links in an interconnecting pedestrian/bicycling system within the community. Any provision for a sidewalk will be a step forward from what we have, or rather, do not have now. I would encourage the wide development of the new sidewalk to match the present sidewalk, narrowing to not less than eight feet. Also, all curb ramps for the handicapped ancbicyclistt SHE-mid be included. I am most concerned on how the new roadway / sidewalk(s) will connect into Christensen Greenbelt Park (Trail) and into any future sidewalks along Interurban Ave. The goal of our department has been to interconnect the residential area, Tort Dent Park, Christensen Trail and the . commercial area, •including the ability of a citizen or shopper to use a sidewalk to reach any of the four areas via a safe route. What will cloud my ability to evaluate any specific road design is the lack of final design for Phase III of Christensen Trail. We have discussed, a number of times, with the State's D.O.T. the route of our trail, either going under their 405 bridge that crosses the Green River or widening, with a sidewalk, their Christensen Road bridge (T -Line Bridge). D.O.T. prefers we widen the Christensen Road Bridge. No final route has been selected, thus it will be difficult to evaluate what may be designed for the Southcenter Blvd. extension. Perhaps the road redevelopment will provide the City with the platform to finalize the trail design. I would encourage all parties involved in this project to keep this trail extension in mind. Please keep me informed about this project. DW/blk • cc: Phil Fraser, Acting Public Works Director !/ Mayor Frank Todd • RECEIVED CITY OF TUKWILA JAN 1 11.982 PUBLIC SY9AY9 DEPT. fOHN SPELLMAN Governor STATE OF WASHINGTON DEPARTMENT OF GAME 600 North Capitol Way, GI -11 • Olympia, Washington 98504 • (206) 753 -5700 January 24, 1983 Mr. Ed Berschinski ' Entranco Engineers 1515 116th Avenue N.E., Suite 200 Bellevue, Washington 98004 Mr. Berschinski, RECEI1VE °" •JaN z7 Asa ENTRANCO ENGINEERS RE: South Center Boulevard 62nd Avenue to Grady Way Bridge Thank you for involving us at an early stage of your proposal. Our general comments follow. The proposal has potential to impact Green - Duwamish fish species. Of special interest to our agency would be steelhead and sea -run cutthroat. Other wildlife that could be affected include waterfowl, great blue heron, king- fisher, hawks, songbirds, small mammals, and coyote. However, due to isolation of much of the area, it does not appear likely that impacts to terrestrial wildlife would be significant, especially if the area is properly revegetated (see attached publication). Fish and aquatic, wildlife losses could be minimized by timing of proposal, erosion and storm water control, including control of petrochemicals after construction. Fish concerns would be addressed in Hydraulic Project Approval process. We have enclosed applications. If you have any questions, please call us at 753 -3318. Sincerely, THE DEPARTMENT OF GAME i Bob Zeig, k¢plied Ecologist Environmental Affairs Program Habitat Management Division BZ:cv Enclosures cc: Agencies Region FRANK LOCKARD Director United States Department of the Interior February 1, 1983 Mr. Ed Berschinski Entranco.Engineers 1515 - ';116th. Ave. N.E."., Suite 200 ENTRANCO ENGINEERS Bellevue, Washington 98004 Re: Southcenter Boulevard Project Dear Mr. Berschinski: Thank.you very much for the opportunity to provide planning information on the above- referenced project. We suggest that you adhere to the construction timing and revegetation recom- mendations of the Washington Departments of Fisheries and Gam. We have no further comments on this project. FISH AND WILDLIFE SERVICE Ecological Services 2625 Parkmont Lane, S.W., Bldg. B -3 Olympia, Washington 98502 RECEOWE FEB 2 12 " Sincerely, Charles A. Dunn Field Supervisor at, oar Municipality of Metropolitan Seattle Exchange Bldg. • 821 Second Ave., Seattle,Washington 98104 January 28, 1982 MEMORANDUM TO: Tukwila Technical Advisory Committee eaaat FROM: . Bob White, Supervisor of Capital Development SUBJECT: Transit Improvements- for Southcenter Attached is a conceptual description of the service and capital improvements package which would provide Metro with the ability to serve a Tukwila Regional Transit Center. Metro believes that this package, when fully implemented, would result in a ten percent or better mode split for the area. If combined with higher employment /trip densities in 1990 or beyond, this concept could accomplish even more. It should be noted that the transit center locations shown on the map are generalized and considerable flexibility exists in the location and design. Metro looks forward to the oppor- tunity to continue to work with you in the implementation of improved transit, appropriate to and supportive of your land use and development plans. BW:kc Attachment .. f N,;:i.v•:....,`i, , : }. ; .. •: t'! • • . ; i cy-� •;' � � � z }d'•: ,a ‘: ".rf •;t,a-t ih 4. ^�.�....E 'l , Regional Transit Centers Regional Transit Centers will serve as "gateways" to the regional transit system and to their surrounding comtunities. These centers shall be located in existing or emerging regional activity centers with convenient pedestrian access to nearby activities. The purpose of Regional. Transit Centers will be multifold: 1) to serve as transit focal points.for the respective areas which function as regional destinations themselves; 2) to facilitate transfers between buses going to the Seattle CBD or to other activity centers; 3) to serve as transit system information and customer service centers for greater public convenience; and 4) to provide connections between the transit system and those public and privately operated vanpool services oriented to employment areas which cannot be as efficiently served by regular or subscription bus services. Local service to and from these Regional Transit Centers will be'provided during the off -peak periods in a "timed- transfer" manner. Timed - transfer means that buses would be scheduled to arrive at a center at almost the same time to allow convenient, "no wait" transfers. In this way, most of the perceived negative aspects of having to transfer can be reduced or eliminated. Similar operations have been found to be an efficient and effective way to provide greater mobility and service 'coverage to lower density urban and suburban areas. Southcenter has a logical potential to be a transit focal point by virtue of its location and the vitality of growth in the.:Southcenter /Andover Park area. The large Southcenter shopping mall is an attractive midday destination for many southend residents, while the Andover Park area is a growing center of employment. A well integrated transit center /timed - transfer bus service would provide Metro a way in which both peak and off -peak transit needs could be enhanced. 1/28/82 A tr \at dmond a' ■1 s ee � MEM :•i 4a egc) 2 0 y WMt4 + 1 CEws R fi") IN r 4 s.c Qi 0 Gi 4 I- 1 • K; n al ...4 To }pip auentas w ■ ■ O. b — *. 1 '" ■ ■ 0. 4. elm. it anorisfie sea ■ • • 1 !UAL" s • METRO SERVICE ORIENTATION TRANSIT 1990 PLAN METROPOLITAN CENTER SECONDARY URBAN AREA REGIONAL TRANSIT CENTER Fai COMMUNITY TRANSIT CENTER 41 TRANSIT COLLECTION'EXCHANGE RADIAL SERVICE TO SEATTLE CB.D NI MI ywSERVICE TO OTHER CENTERS PARATRANSIT ROVING VAN SERVICE !VAN POOLS J Service Concept - Southcenter Regional Transit Center Existing service to Southcenter area consists of: - Five routes operate all day to the area from Seattle, Burien, Auburn /Kent, Renton and Bellevue /Eastside. (Routes 123, 150, 155, 240, 340.) This service is augmented by limited paratransit service. - Most peak hour service has been scheduled to serve core hours at Southcenter with some express service provided. Limited.peak hour service scheduled specifically for Boeing complexes. - No direct service from the Federal Way area exists at this time. - Many of our existing routes serve only the Southcenter Mall with little penetration South of that area. Initial concepts for service to the Regional Transit Center include: - Revised routing to serve both the Southcenter Mall as well as industrial /office parks via a "transit corridor" on Andover Park West. - Continued operation of direct service to the area from Auburn /Kent, Renton, Burien, Bellevue /Eastside, and downtown Seattle. - Initiate new peak hour service from areas that do not presently have direct service. Federal Way /Southcenter Kent East Hill /Southcenter West Seattle /Southcenter (Limited midday service from these areas may also be added.) - Possible shuttle service to be provided by the Southcenter merchants and /or major employers in the area. Operating to /from the transit center. JH:ct 1/27/82 TRANSIT IMPROVEMENTS FOR THE SOUTIICENTER AREA The following numbers are keyed to the Daily Traffic Assignment map: Interurban Avenue and Southcenter Boulevard Improve turn radii and signalization /channelization. Tukwila Parkway and Andover Park West Improve turn radii and. signalization /channelization. OStrander Boulevard and Andover Park West Signalization /channelization. OMinkler Boulevard and Andover Park West Signalization /channelization. South 180th Street and West Valley Highway Signalization; provide preferential transit turning lanes; provide space and improvements for bus zones at this intersection to allow transfers. OSouth 180th Street and Andover Park West Improve turn radii and signalization; widen South 180th Street between Southcenter Parkway and West Valley High- way and incorporate preferential transit turning lanes at this intersection. South 180th Street and Southcenter Parkway Signalization /channelization. South 188th Street and I -5 South Provide a new southbound ramp for new connecting arterial between South 188th Street /I -5 and Southcenter Parkway. Andover Park between Tukwila Parkway and South 180th Street Construct a transit -only lane in each direction on Andover Park West to ensure efficient transit operations. Incor- proate with items 2 -5. 2 Tukwila Parkway between Southcenter Parkway access and Christensen Road Construct a transit -only lane in each direction. along Tukwila Parkway to minimize transit delays due to congestion. Mid -Block Pedestrian Access Construct pedestrian walkways at mid -block between inter- sections of superblocks east and west from Andover Park West as indicated by arrows to improve pedestrian access to the proposed transit corridor. Transit Center Facilities Construct one-facility near the shopping mall and a second facility further south along Andover Park West to allow all routes arriving from north and south to serve both the shopping area and the office /industrial park area. Routes arriving from the north would turn around at the south facility, while routes arriving from the south would turn around at the north facility. HOV Projects Neither Programmed nor Budgeted by WSDOT • I -5 South: Southcenter Ramp Improvements Provide HOV lanes from I -5 to Southcenter: Approximate cost: $9,200,000, 1983 -1987. • I -405 South: Southcenter Transit Access Provide HOV lanes from I -405 to Southcenter. Approximate cost: $6,000,000, 1983 -1987. JL:ct 1/28/82 APPENDIX A FLORA AND FAUNA INVENTORY APPENDIX A VEGETATION FOUND ALONG THE PROJECT CORRIDOR COMMON NAME Trees Black Cottonwood Black Locust Big -Leaf Maple Common Horse Chestnut False Arborvitae Hawthorne Madrona Oregon Ash Red Maple Silver Maple Red Alder Shrubs ,English Holly Himalayan Blackberry Pacific Willow Broom plant Herbaceous Plants Bluegrass var. Clover var. Common Tansy Common Dandelion English Ivy Fescue -grass var. Foxtail Barley Goldenrod Horsetail Sweetpea Source: Entranco Engineers SCIENTIFIC NAME Populus trichocarpa Robina pseudoacacia Acer macrophyllum Aesculus hippocastanum Thujopsis databrata Crataegus laevigata Arbutus menziesii Faxinus latifolia Acer rubrum Acer saccharinum Alnus rubrun Ilex aquifolium Rubus discolor Salix lasiandra Cytisus sp. Poa sp. Trifolium spp. Tanacetum vulgare Teraxacum officinale Hedera helix Festuca sp. Hordeum murinum Solidago sp. Equisetum sp. Lathyrus sp. MAMMALS OF THE LOWER GREEN RIVER WATERSHED . COMMON NAME American Oppossum Cinerous Shrew Vagrant Shrew Dusky Shrew Water Shrew Marsh Shrew Trowbridge's Shrew Shrew -mole Townsend's Mole Coast Mole Various Bats Eastern Cottontail Mountain Beaver Townsend's Chipmunk Eastern Gray Squirrel Fox Squirrel Douglas' Squirrel Northern Flying Squirrel Common Deer Mouse Mountain Deer Mouse Bushy- tailed Wood Rat Townsend's Meadow Mouse Long - tailed Meadow Mouse Oregon Meadow Mouse Muskrat Norway Rat Black Rat House Mouse Pacific Jumping Mouse Porcupine Nutria Coyote SCIENTIFIC NAME Didelphis marsupialis Sorex cinereus Sorex vagrans Sorex obscurus Sorex palustris Sorex bendirei Sorex trowbrdigei Neurotrichus gibbsi Scapanus townsendi Scapanus orarius Chiroptera Sylvilagus floridanus Aplodontia rufa Eutamias townsendi Sciurus carolinensis Sciurus niger Tamiasciurus douglasi Glaucomys sabrinus Peromyscus maniculatus Peromyscus oreas Neotoma cinerea Microtus townsendi Microtus longicaudus Microtus oregoni Ondatra zibethicus Rattus norvegicus Rattus rattus Mus musculus Zapus trinotatus Erethizon dorsatum Myocastor coypus Canis latrans MAMMALS OF THE LOWER GREEN RIVER WATERSHED COMMON NAME Red Fox Raccoon Short - Tailed Weasel Long - Tailed Weasel Mink Spotted Skunk Striped Skunk River Otter Bobcat SCIENTIFIC NAME Vulpes vulpes fulva Procyon lotor Mustela erminea Mustela frenata Lutreola lutreola Spilogale putorius Mephitis mephitis Lutra canadensis Lynx rufus Source: Eastside Green River Watershed DEIS, U.S. Soil Conservation Service, November 1978 as adapted from Tukwila Hotel EIS. Fish Species of the preen River Common Name Prickly Sculpin Threesp1ne Stickleback Brown Bullhead Churn Salmon Coho Salmon Chinook Salmon Yellow Perch Mountain whitefish Long - !lose Dace Speckled Dace Cutthroat Trout Steelhead Trout Rainbow Trout Dolly Virden Trout Scientific Name, Cottus riper Gasterosteus aculeatus Ictalurus nebulosus Oncorhynchus keta Oncorhynchus kisutch Oncorhynchus tshawtscha Percy flavescens Prosop i um W i l l i amson i Rhinichtays cataractac Rhinichtays oculus Salmo clarki . Salmo gairdneri Salmo gairdneri Salvelinus cnalma Source: East 'Side Green River 1':atershed DE I S, SCS, November, 1978. as adopted from Tukwila • Hotel EIS. Birds 21 the Lower, Green River Watershed Common !lame Common Loon Horned Grebe Western Grebe Pied - Billed Grebe Double- Crested Cormorant Great Blue Heron Green Heron American Bittern Whistling Swan Canada Goose White- Fronted Goose Snow Goose I'a I I and Gadwa I I Pintail Green-Winged Teal Blue-Winged Teal Cinnamon Teal European Wigeon American Ntigeon or Baldpate Shoveler Wood Duck Redhead Ring - Necked Duck Canvasback Greater Scaup Lesser Scaup Common Goldeneye Bufflehead Harlequin Duck White- winged Scoter Surf Scoter Common Scoter Buddy Duck Hooded i•ierganser Common ; ,erganser Red- Creasted Merganser Pigeon Hawk Sparrow Hawk Ruffed Grouse California Quail Ring - Necked Pheasant Virginia Rail Scientific Name Gavia immer Pcdiceps auritus Aechmophorus occidentalis Podilymbus podiceps Phalacrocorax auritus Arden herodias Butorides virescens Botaurus 1entiginosus Olor columbianus Branta canadensis Anser albifrons Chen hperborea Anas p1atyrhynchos Anas strepera Anas acuta Anas carolinensis Anas discors Anas cyanoptere Maraca penelope Maraca americana Spatula clypeata Aix sponse Aythya amer i cana Aythya collaris Aythya valisineria Aythya marila Aythya Affinis Sucephala clangula Sucephala albeola Histrionicus histrionicus i;elenitta deglandi Melanitta perspeicillata Oidemia nicra Cxyura jariaicensis Lophodytes cucullctus Mergus merganser I Fergus serrator Falco columbarius Falco sperverius Conasa umbe I I us Lophortyx californicus Phasianus colchicus Ral lus I imicola American Coot Killdeer Common Snipe SpottedSandpiper Greater Yellowlegs Lesser Ye I I o.•i l eos Pectoral Sandpiper Least Sandpiper Dunlin Long - billed Dowitcher !Western Sandpiper Wilson's Phalarope Glaucous - winged Gull Western Gull California Gull Ring - billed Gull New Gu l l Bonaparte's Gull Sand - Tailed Pigeon Rock Dove Hourn i ng dove Barn Owl Snowy Owl Spotted Owl Short -Eared Owl Common Nighthawk Slack Swift Vaux's Swift Anna's Huhn i ngb i rdd Rufous Hummingbird Seated Kingfisher Red- Shafted Flicker Hairy Woodpecker Trail's Flycatcher !Western Flycatcher Western Wood Pee flee Olive -Sided Flycatcher Horned Lark Violet -Green Swallow Tree Swallow Bank Swallow Rough - Winged Swallow Barn Swallow Cl i ff Swallow Purple Martin S to l l er' s Jay Common Crow lack- Capped Chickadee Chestnut - packed Chickadee Common Dushtit Winter Y!ren D ew i ck' s Wren Long-Billed :4arsh Wren Robin Varied Thrush Fulica americana Ch racrius vociferus Capella gal l i nac:o Actitis macularia Totanus mclanoleucus Totanus flavipes Erolia melanotos Erolia minutilla Erolia alpina Limnodromus scolopaceus Ereunetes mauri Steganopus tricolor Larus glaucescens Larus occidentalis Larus californicus Larus de l awarens i s Larus canus Larus philadelphia Columba fasciata columba livia Zenaidura macroura Tyto alba Hyctea scand i aca Strix occidentalis Asio flammeus Chorde i I es minor Cypseloides niger Chaetura vauxi Calypte anna Selasphorus rufus reaacery1e a1cyon Culaptes cafer Dendrocopos Pubescens Ernpidonax traillii Empidonax difficilis Contopus sordidu1us ti'uttallornis borealis Fremophile alpestris Tachyccineta thalassina Iridoprocne bicolor Riparia riparia Stelgidopteeryx ruficollis Hirundo rustica Petroc 'helidon pyrrhonota Progne subis Cyanocitta stelleri Corvus brachyrhynchos Perus atricapillus Parus rufescens Pscltriparus minimus Troglodytes troglodytes Thryornanes bor_w i ck i i Telmatodytes paiustris Turdus migratorius I xoreus llaev i us Swainscn's Thrush ::ouni- in ^,Iuebird Western E• I ucb i rd Golden-Crowned Kinglet Ruby- Crowned 'Kinglet Water Pipit Cedar Waxwing Northern Shrike Starling Solitary Vireo Red -eyed Vireo Warbling Vireo Orange- Crowned Warbler Hermit Warbler Yellow Warbler Townsend' s Warbler Black- Throated Cray Warbler Ye I I owthroat Wilson's Warbler House Sparrow Western t•ieadow 1 arkk Red - Winged Blackbird Bullock's Oriole Brewer's Blackbird Brown- Headed Cowbird Western Tancer Black- Headed Grosbeak Pine Grosbeak Purple Finch House Finch Pine Siskin American Goldfinch White-Winged Crossbi11 Rufous -Sided Towhee Slate- colored Junco Savanna Sparrow Chipping Sparrow White-Crowned Sparrow Golden - Crcwned Sparrow White- throated Sparrow Fox Sparrow Lincoln's Sparrow Song Sparrow NylocichIa ustulate Sialia currucoides Sial is mexicanna Regulus satrepa Regulus calendula Anthus spinoletta Sobycilla cedrorurs Lanius excubitcr Sturnus vulgaris Vireo solitarius Vireo olivaceus Vireo gilvus Vernivora celata Dendroica occidentalis Dendroica petochia Dendroica townsendi Dendroica nigrescens Geothlypis tichas !1iIsonia pusiIIa Passer donesticus Sturnella neglecta Euphagus cyancephalus Icterus bullockii Euphagus cyancophalus i•+olothrus titer P1range 1udovici -anti Hesperiphone vespertine Pinicola enucleator Carpodaccus purpureus Carpodacus mexicanus Spinus pinus Spinus tristis Loxia Ieucoptera Pipilo erythrophthalmus Junco hyenalis Passercu1us sandwiichensis Spizella passerine Zonotrichia leucophrys Zonotrichia artricpi1la Zonotrichia albicollis Passerella iliaca :'clospiza lincolnii ':elospiza ^elodia Source: East Side Green River •.'atershed DEIS, SCS, 1lovember, 1978. as adopted from Tukwila Hotel EIS. APPENDIX B AIR QUALITY ASSESSMENT AIR QUALITY ANALYSIS FOR ENVIRONMENTAL ASSESSMENT FOR SOUTHCENTER BOULEVARD (62nd Avenue to Grady Way) Prepared By WASHINGTON STATE DEPARTMENT OF TRANSPORTATION November 1, 1982 SUMMARY Air quality impacts resulting from the proposed construction of additional improvements to Southcenter Boulevard between 62nd Avenue South and Grady Way will improve the mesoscale air quality of the I -5 /Renton corridor. Construction of this project will not increase the overall traffic volumes in this corridor. It will provide an alternative route for traffic which would use I -405 if the project were not built. The "bottle neck" in the existing Southcenter Boulevard causes queueing of traffic, a corresponding reduction of speed and a greater level of pollutants being emitted. Removal of this "bottle neck" would cause an increase of traffic speeds and a corresponding decrease in congestion. This in turn will decrease the pollution per vehicle. The completion of this project will cause no adverse air quality impacts within the project area. CLIMATE The climate of the area is determined by the geographic relationship to the Puget Sound and Pacific Ocean water surfaces which control the moisture content, temperature and velocity of air masses reaching Renton and the whole Puget Sound Region. The maritime air is a. moderating influence and is responsible for the generally mild winters and summers. The average yearly temperature is 52 degrees, with a high of 90 degrees in summer and a low of 25 degrees in the winter. The dry season is from May through September, and the rainy season is from October to April, with over 75% of the total annual precipitation occurring during the latter period. The average yearly precipitation is 35 to 40 inches. The prevailing regional wind is from the southwest in the fall and winter months, gradually shifting to the northwest in the late spring and summer. No change to the climate conditions of the area will occur as a result of constructing this project. EXISTING AIR QUALITY The principal sources of air pollution within the study area are transportation emissions, heating system emissions and emissions from local industries. Since the study area is mostly residential, with limited industrial development, air pollution from other than transportation sources is relatively minor. However, the Puget Sound Air Pollution Control Agency has on file 10 stationary pollutant sources in the vicinity of the study area. Container Corporation of America 7000 South 143rd Street Renton, WA 98055 Sternoff Metals Corporation 1600 S.W. 43rd Street Renton, WA 98055 Northwest Steel 22011 - 84th South (home office) Kent, \VA 98031 Paccar, Inc. 1400 North 4th Renton, WA 98055 Boeing Airplane Company 8th North and Park North Renton, WA 98055 Interpace Corporation 1500 Hauser Way South Renton, WA 98055 King County Gravel Pit ii40 3005 N.E. 4th Street Renton, WA 98055 M. A. Segale Edmonds and N.E. 3rd Renton, WA 98055 Renton Municipal Airport 200 Mill Avenue South Renton, WA 98055 Mobil Oil Corporation 1600 Lind Avenue S.W. Renton, WA 98055 The major transportation generators of air pollution in the study area are I -405, Southcenter shopping mall, Longacres Race Track, SR 181 and Grady Way. Building this project will not cause any appreciable change in the existing conditions for transportation sources of air pollution. Changes within the project corridor will be positive with the increase of speeds and the corresponding decrease of queueing traffic. -2- NATIONAL AMBIENT AIR QUALITY STANDARDS A new approach to air pollution control came into being with the Federal Clean Air Act of 1970. The law requires the U.S. Environmental Protection Agency to promulgate national primary and secondary ambient air quality standards. The primary standards for each pollutant are based upon known health effects for that particular substance as detailed in "air quality criteria" documents published by the federal government. Primary standards protect the public health and must allow an adequate margin of safety. Secondary standards must protect the public welfare against other adverse effects. These include effects on soils, water, crops, vegetation, man -made materials, animals, wild life, weather, visibility, climate, property, transportation, economic values and personal comfort and well being. Pursuant to the schedule established by the Congress, the Enviornmental Protection Agency published on April 30, 1971, the first national ambient air quality standards. In January 1979, the standard for photochemical oxidant was renamed "Ozone," and was changed from 0.08 ppm to 0.12 ppm. standard for lead in air was adopted in October 1978. A new national The following table is a summary of the current Ambient Air Quality Standards: L O C .I+ N N O a -) 0. ,t-. L 1• ••+ 0.)L-0.....00 a .0 L C a 0 .0 V n• 0 0 0 j U• •• 7 0. r•- a 0.>, 0 7 W •.- 0 L' •.- C) Q .0 N .0 Q 4- N r 0 N • E. .J E q C' A 0) • ro 0 0. •r ..•• g - ✓ 7 V 0 0') L •.- y 0 10 0' N ro W c N .7 a o, •-1 >1 C O N t C RI l a tel ' 0) ..' >147.. O N 0 ,a„ • C 01 L N a) q• r •4 ro 1 V 7 ••• 0 y a a L .0 L C N .d C N •-' ro 01 .0 E r L .4 .J ro .-- N ro g L 7 3 N N C .0i ..... L C U C a Q .0 u V N L •0.o a '0'r >- a 0 v v N V •,- W C C E 100 V a t 01 u 7 •r In C r L a 0 O. a q u a 0 0 0.12 L V N U n (.. 7 7 C N C L. 0. x.0 'O C L ° C a) .J C u, .. n; 0 u L E t. a s C p L 40 .0 L .0 .0 0 NL 0x.0 • O0. ^U.-. • .2 O L V .- .3 . O 7 a y L •0 7 7 0. • C.0 ro y ••1 x n '^ 0 C ) 0 N 0 .-• ••• •r y 0 N 4- ,0 C N N •.- y y C C C ro• 30 C O= ro a 4) 10 0 a +-1 a - 10 01 Z 'O 0 .0 ..., ,•y- 0) 0 0)14') N Y7 0 y .0 0 O a L C O C- v1.4- 0 C 0 RI IV X .0 ro N .•• 7 4 7 • a x.0 0 7-0 O O= U •• .-..• O .-- U 0 0 .-+ y N U NIBIENT AIR QUALITY STANDARDS SULFUR iixIDES NITROGEN DIOXIDE .- t a , a 1-• 4- N 1 "at 0. V a N - O• a > a 1 C O N - J] a > W 1 ./., O .L V a O . wt... O .- L a L a co '3 L t N co, 0 ,• L y a O N La •' N -V O L ' L a •A . .+ L >, L .3 L 0 t-. V •r 0. N n .0 4.4 N II L 0. 0 7 r L •- c- 43 0 V 10 E 4- .-• .r -o • 0 L F U O j 4-1 C ... ,C v a a N x a v C C E O l r W '-• «' L • -' a E O V 0 0 0 U U W a W 44 U >4 17 L W 0 j- N 4.1,t-01 O ro a C U ro a ro .G • 0. L v- x L N 0 0 ID ••- I 43 O o .0 N 0- 0 .- n., a 0 0 0 4, N 0 a a 0 1 J. C L 0 C U 1+ >� N 00 `a s AO AV L L 7 . C •J a 0 C y .0 .-' 0' a 1 N E C v .0 0. O U y • r v L J L 7 0 a 0 c.: .c r a a'0 x L L. 0.J 7 u ., x. 0. E 03 0 .0•• -r- a 0• © C N .-'•r .-. a•r b- 0 O o Q ro O x .• N J[ L .n ro L E L V .- O C.1 '- , F c E L 0.° 03L ro mt. .- 0 U >> 0 V C O 4- c 0 a•r• .0 c N r■ e0 car) C.) U .0 x oV .-+ 0 •- • W a U O a 7 0 .O 0.O O.c 0 c C N 4- O1y yr- C W a .r L 0.- N G C O V a 5 •U b U ,_p V >> 0 L 7 a1 •r b a C 01 P V - V C C N a .-- L O. UL O10 ro X 0) O a a a • 70yEt o0. x =N E+' €V ONv bv roa .CU- N00 O N ...... 0 0- x 0) 0 L •2 x a N C a t L L ro 0 0 V y 1. L c O o ... .-• •- art Cr. 0 a E u _ O .0 a O 0 L a r a •• O Q 4a -1 4- 0) c > > .0 mi. r C NrC •.- C r1rV«1 a L. W _ y O, O- 1a 4 0.a•r LA 01 in V C n3 ~ a y O q •.- a L 0 N U a U V X a 0 N E C7 O N- A cu N a ro - O U 0.1 V E +•' p •r C C 10 L U c- 0 f a'0 • 4"• E 0 V 4- 01 o a E •- N V 0 0 > '- N a a a o N >> w .c N N C N U +•+ 10 O 1., .- 30 N L /0 T L L L 4- .O y ,11 .0 a V a a a 10 >, U N L > - 4) fj L. t N U a y U ro U G ....1 -c, U .0 0 y ro •r • - a I^ - a s .r 0 ..- 44 O 0 7 0 •.- 0 >, 0 .-• .0 N CT >) V L V.. 4-' c a'- ..- 0) L O C N L 4 4- U •LO +L1 N 0) �• La.. t O •L I A 4-• y N 0 0 L. 10 0.0..- U 4-- ro 4. 10 , x L. .r- .c 4. a •r >- 0) x >,• .0 .0 0 0 .G W I a 7 0 7 a 0 10 4- 0 r- a S 0 0. 10 0. 0.0 O. S Cl 0) .0 2t- U 04- 10 0. J -.1.00 04. > -r- 4.4 .-•{]V N 40 ro 43 ro '0 10 .0 0. N S CD O Q O f-4 o. O LD .0 0. 00 0. N to c C o E .J 10 ro N •� 0 Wu. •0 4J U 40 •0 .0 c N O vl O O .•-1 N S O O O O 0 .0 4' >1 r") u co 7 0 1' .0 N 7 a a L E•rt N d.. ro R O parts per million L tu 0. N a ro a L E 0 u L. .4- U LI o E u II II a N N N rn q a N V 0 >0:7 .0 ro •JaVj '0 .0 .0 ro L A .0 a ro .0 1.- ro E O O ul O a Q1 a O O LO .-•t a •0 N a ro N a 0o N 0) 10 N a ro V) udd M O O a• .- - O CEO+ a l!1 O ~ C V _ ppm Q1 1. -1 M EE 0. O 0. L - O O 0. 0. CV O E Cr a 1.11 H .n ;J co 1• O ro L >f CO C:, > < 1'. .-- 03 v) c C a 47' 0 4.. 0) > Q >. ro C) J a 0' ro L a > v L 7 0 .7 a a 01 01 '0 17 L L a 0' > > S 4 L L 7 7 0 0 .c .0 1 r) ..... 41 01 .0 4- W > < L 7 0 .0 • .--• Y 0. N L a > Q C E ul SUSPENDED -. PARTICULATES Annual Geo. Mean 24-hour Average CARBON MONOXIDE 6-hour Average OZONE 1 -hour Average W c3 a >.; 0) L� '0 1. o a > W Q L7 1-- (0 10 n 7 t- 0 0 HYDROCARBONS (Less Methane) 3 -hour Average LEAD Calendar Quarter Average Cu ro • • 0 L. • 1 a 1 .0 C a C 7 N C., C }•i L ,t) 4- a•. 7 0 •, n 10 u C-• ••- 11 a• C a U 11 • x C L 0 4) - C ro V ..• a C >., a 01 v, a 7 C N '0 v A V ., I 1 1» a U. a ^ 4) F- C L a '1 '0 U IF •- V a U U N N r .- 10 ••- ,, N L v •.- a G • L •1) • 7 10 '0 J C N "- N � N V. .r MI > L 0 ,1uj rJ T) N O1 7 C L a C1.r a ro N a O '^ L L N a >1.+,r 7 1,0: WO A L •.- ro U a- N y •r - U a .- .0 � ro A 1 ••- U ro N 1 a s N W L L C r U a 0 •r 4 1 0 ,..• ro C L L U 0. ,. 0 •;0 4_ E: * :1 u u V 0) O NC „ a C .0 C 4- 0 N ,.- L l•, : t a XI N 4) 4• . N .4 0. 0. 0 N N a✓ a U ro 4J a 'Cl -ro L 01 0 /•-• t. a C: a U L LE '04.0) c 4.0,00..-. r •0 > U N . O •-• .0 •r N PARTICULATES • • .n '0 1J 1 4 .•1 a 4 >1 C 4 C .-- 0 1-• 0 f1 L n 6 L 0. >, .- 0 4) 0 x 0. •-• 10 10 C 0. U .- A V .n C 10 0 0 •.- .- '- 4- 0) V 4 C V O .- •• a .0 O ro> ••- a 0.) L •• N ^ U •.. •J E 0 N O) .•- •-• O a 0 .1 .•• O v L 0 \) T • 03 V ••- C ^ .0 0 u y L .+ O a ^ •- +, .. . r u..• L L •.• >... a 0 a N W 04 >1 ^ I0 T .0 a 0 L .-' C 0 L W 01V CO U V) a 7 N 0 1A a 0 •-- 0 C 0 , n u C. '° • ■• a L .' V 0 •r 1A V W a s .0 N r 0 ro L N N a 0 a) 4) L^✓ a C L L 0. L E L Q. ,0 a 4- •O• r s Y r 0%.• ro 1. O. AV N > N u 0. 0 V a a J] C C V,. C L 41 N.0 • ro s L 0 0 a .1 U, L V�' a 4. .. O a L ✓.• 0 0) O.0 U '' N ,L a O C L .2 In C V C] .G ..• V 4. C •0 4.- -1 4- y .r 0. C O - �' U .V a r O U U L 10 L U U .0 V U. a 0 N a C N N C ALL a 7 C .0 •-. ` .0 C 4- Vl 7 a • > .0 .•.1 1 V •• 4- . u 13 .r a CAahCU !)')X 1 PSAPCA 6/79 C CU L a u V > 1 >L 4- pp a 0 a 0)0 0 > N •- L 10 L C a a) Ca o. o E b a 7 L 0 0 0 0 000100)0) 0:00) O° •) .-.>4 C r'" C C U 10 10 RI •0 a L .0 ro .0 .0 .0 0. 7 .•• T) 4.' +•' N x _co L L L 0 0 0 0 0 V E E O a E 01 4' v V v x x 7 .o L - rn ro 0 a a a V ro 0 00)0 6/0aE o•' � .+ X u a a• -1 a u u u : ro E X x x ✓ • ^ ro • 0 0 0 0 7; 0 03 ro a O A oa A A fJ ro. L r N a 0 L u .+ 4;1_, V a C L EE > .., 0 ro a 0. n 0 0 0 0 +, 0. 0. 0 10.0 U V a � .- �t LA N ro ° 0 IA -C •'- • 40 4- / V t. a .-• v. 0 F ro •' ro> J] • . ♦- L ro u N 0 a s ‚0 0) C ) 0. . ro uOwN nF .0 L 4_ C •'0 C+ V z - x 0. 0Q10404:40 . C ., W a a O. 01 V •.1 N G O c >.' 0 - N ••• 10 C 0 a > • L a 0 0 •4 >1 -0 04 1n4- 0 N 0)14. 10 .- ..• r) 0 ! > a+ .0 . 0 > C U n 0+ ~ • ✓ •C .•. O r N r U F N K N a a s U •r C N us 30 IJ V C .' •.• L> n CU 1a L •r 0034J34.1 L 7 A O- N L VI 4),„0.„..-03 U r, 0> 0 a Q U N O •.- 0 0•00 a 0 v, Jt E 7 t UV N- Wr 0.,r V tJ 0 V •000,00.10 E H• a> AO > a a CU 0 ••• G'P N•.- ro,0 A > 0.>1 L 0 N4) x y E L L O•Ct.- N MI .0 a .-1 0 'N O •r c. .0 U V IV 4:1 0> p •... 0 01 c. C Ov, v ,, •- Cu U C a O xc 0 •r .-1 ro •r r • i A L A O x v L 1 0 CC./._ C C a) .0 r •-•G,7•.c• 100 O 0,- O..4)~ O 0 U •r 0,4- O 10 a) L p 10 0) 7 a 0 t- >1 .0 A t" .• U .-• L 0 N' •• L E L 10 0 11, h ,0 «' 0 01.- Ln 0 0 • 0 f: •• - C U U a C 10 O 4- C 0 •- - V U Co 'J U ._ O 01 t L N 0 U y O K JD 0 Y O L N •-• L O O >. O a '0 0 0) 0 4) 0 .0 0 L 0 E ro .0 L .0 U O+ A 4. V •• ro ■-. C W 0..0 VI V MI 7 U 4- r 1. r L L L L 1_ i MICROSCALE ANALYSIS No microscale analysis was performed for the project. A review of the microscale analysis performed by Washington State Department of Transportation (WSDOT) for an adjutant project, SR 515 S.E. 196th Street to Carr Road, allows the conclusion to be made that there should be no adverse air quality impacts. The criteria and information used by WSDOT in their analysis for SR 515 is as follows: 1. Although this project is close to the southern boundary of the motor vehicle emission inspection area for Seattle, no inspection maintenance credits were considered in the 1984 and 1990 emission factors. 2. PM peak hour traffic volumes.(4:00 to 5:00 p.m.) were used in the study since the slowest traffic speeds and most congestion occur along the highway and arterials during this time period. 3. Receptors were located along the right -of -way line and at major intersections. 4. The worst case meteorological conditions used were a one meter per second wind speed and a Class F stability for the one hour average. 5. The background concentrations used in this study were derived in the SR 515 Carr Road to Puget Drive Air Quality Study completed in October 1979. The background of 3 ppm for one hour and 1.3 ppm for eight hour average represents contributions of CO from other than identifiable vehicular related sources and from roadways which were not included in the roadway network analyzed. -5- • The results of the predicted CO concentrations for the p.m. peak hour for all conditions (years) studied are shown in the following table. Add 3.0 ppm as background concentration for one hour average Add 1.3 ppm as background concentration for eight hour average All of the build conditions are values less than the corresponding no- build. This lends support to the finding that improving traffic flow with an increase in speeds and a decrease in congestion, queueing, result in a decrease in pollutants emitted. CONCLUSION The build alternative will improve the air quality in the mesoscale corridor. There should also be a positive improvement within the microscale or project corridor. This will be a result of improvement in traffic flow with the corresponding congestion reduction and the potential capability for increase in speed. PROJECT CONFORMITY WITH THE STATE IMPLEMENTATION PLAN This project is in an air quality nonattainment area which has transportation control measures in the state implementation plan (SIP) which was approved by the Environmental Protection Agency. The FHWA has determined that both the transportation plan and the transportation improvement program conform to the SIP. The Federal Highway Administration has determined that this project is included in the transportation improvement program for the Puget Sound Council of Governments. Therefore, pursuant to 23 CFR 770, this project conforms to the SIP. 1M/239 -8- APPENDIX C NOISE ASSESSMENT SUMMARY CITY OF TUKWILA Southcenter Boulevard 62nd Avenue South to Grady Way Bridge Noise Assessment A. W. Elston October 29, 1982 Revised December 1, 1982 Ths most significant aspect of the project area, as it relates to noise, is that is lies essentially parallel to the I -405 freeway and is, therefore, dominated by traffic noise from I -405. Only at relatively close points to Southcenter Boulevard and certain of the adjacent streets and arterials is there any difference in noise levels other than that due to 1 -405 by itself. The area between 62nd Street and 68th Street on the north side of Southcenter Boulevard is a valuable piece of real estate containing fairly new office buildings, Tukwila City Hall, city park, etc. Only one private dwelling opposite 68th Street was found to be above the guideline noise level as defined in Table I. Expected natural growth of traffic in this area will cause about 1 dBA increase in noise which would apply to the 1990 "no- build" or Alternate 1. All of the build alternatives, that is Alternatives 2, 3A, 3B and 4, have an identical effect on this area between 62nd Street and 68th Street and will cause another 1 dBA rise above the no -build condition by the year 1990; and no sites will be above guideline noise levels except the one that is already above. Construction of any of the alternatives will cause an unnoticable increase in noise relative to not constructing anything new. Abatement by means of noise walls is not considered necessary. The office building at 65th Street is very close to Southcenter Bouldvard but is below design noise levels for commercial property and shows no indication of any outside activity that would be sensitive to noise. Interior noise levels quite probably are perfectly adequate for office work since the building was built there under present noise conditions. The private dwelling also shows no indication of outside activity areas facing traffic. The rear portion of the property is shielded to some extent by the top of the well vegetated cut and should be quiet enough for outside use without undue annoyance from traffic noise. METHOD OF ASSESSMENT Determination of the effect of a project will have on the noise climate in adjacent areas is based on three steps: 1. Identify land use and the sensitivity of a particular use to noise, i.e., houses, schools, parks, commercial establishments, etc. 2. Find existing noise levels. 3. Predict future levels, including the contribution from the proposed project. Noise impact,• that is problems with noise, is based on increases in noise over what now exists, and actual level in the future as shown by the Design Level /Activity Relationships of Table I. As an example, increases between 5 and 10 dEA and /or levels of 67 dBA or more for residential use is a condition where mitigation would be investigated. Four locations were measured and site location is shown on the Noise Contour map for no -build (Alternate 1). It can be seen that measured values agree well with noise contours, which were predicted. Existing noise contours are shown superimposed on all the noise contour maps for comparison. Predicted values were obtained by modeling traffic, geometry, etc. as described in FHWA HIGHWAY TRAFFIC NOISE PREDICTION MODEL (FHWA -RD -77 -108) (December 1978). DISCUSSION By inspection of the noise contour maps, it can be seen that none of the alternatives have much effect on the area between 62nd Street and 68th Street. As stated in the summary, mitigation is not considered necessary. There are, however, vacant lands along this section of the project that could, and probably City of Tukwila Noise Assessment Revised December 1, 1982 Page 3 will, be developed sometime in the future. The City of Tukwila can provide potential developers with the appropriate noise contour maps (the alternate chosen for construction) as an aid to the developer in design and layout to avoid a future noise problem. For example, if the developer is aware of the noise condition, he can place parking areas in the noisy areas, buildings in the quieter areas and face windows away from traffic; or build buffer zones, earth berms or walls and landscape areas to provide the type of noise climate needed for that particular development. The proposed bike trail park along the Green River will be affected differently by the various alternates and from the standpoint of noise, the two alternates, 3B and 4, which eliminates the section of Southcenter Boulevard from 68th Street to Interurban Avenue along the Green River, would provide the quietest environment for this section of the bike trail. The overall benefit, however, in choosing 3B or 4 over the other alternatives is minimized because in all cases, the bike trail must pass beneath the noisy I -405 freeway. 1:PD36 r� W J CO F-- DESIGN NOISE LEVEL /ACTIVITY RELATIONSHIPS V VI U 11) C C •r > 4- +) U 0 U 4-5 • r C U 1 O C OT7•r •r- r- r i-•r•r 0 C ^ U r• C •r V1 0111 U C r 4-1 C r0 r U +) V1 •r O S- 3 U r0 b 'O .0 r0 E S-. S. 0 4-) 0 0 0 C7 U 0 4-1 0 r0 0.0 C U 0. V) r-. ^v 0. 0 0 0 O. 1-3 O 4-' V) = V) C S- C 4-)E U V) S- U Ql r - r in U b U •r 4- co 0 •r 4-3 ( C U V) •r V) Cr) •r 0 0 G) L r0 •r O C r S- O C ^ M 0 4-1 S.- V) 4-1 •r U O •r Q) 10 •r •r V) 01 Cr (0 C r0 ,G V) S. Q) L 4-3 S- 4.3 r- 0 V) 5- •r O. 0. 0) 4-1 0 .0 •r Q) b (1) 13 al •r- .1-• ..0 rUT7 0 (/) >>0. •r > Q) 4-3 1-3 C > 4-3 U Cl. S- (0 C r- •r- E •r r0 r0 S- b ITS O U O. 0) r 4-) • O. U U > U V) S- •r 0. 0 Cl. Q) V) ^ U Q) 0 V) >> V) S_ 5- f0 S.• b •r S- r V) b > •r O 4.) 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U 0 0 0 0 U U V) •r r C r0 (0 >> • •-• U •r O U ^'r S_ •• > U .Y 0 r0 U S. 0) b 0. r C V) S- V) O U +3 S_ '0 S. U •r- S- U V) 0 0 4-1 O -0 U U r O •i-3 IV •r •r U = b •17 U U •r 4-) O)•r •r r U > 0 O •.' U S- r r V) r 0.. •r V) C S. U •� 0_ 0) U •r 0 .r b +3.0 r0 U U4- U 0 4.3 U V) > > •L7 N73 S- X O 0 0 C 4- S- 4- 4- •r 0. MI U 0 U r-- U -Cu O 1-- U O. Cr 4-1 •r 0 03 0 0 0_ VI C-) E.0 CI U 0 V) (0 tion of Activit CO 0 V) U U J .0 U Cr V) U •r _J 0 Cr) CU 0 •r 0 > 0) •r U U b C[ U Q U S- S- S. 0 0 O 1\ •r N •r 1 N •I- LO S_ r- S. 1 LC) S- � 4-1 a) {U-) X X X W W W CO U O W C >> O r •r r- 4-3 b (0 M C 4-) (0 C V) •• C E 0 • E 5- 4r-) -0 0) U Q 0 U S- N 0 b 3 >>1. .= b 0)3 S. r C U = 0) 4-) r 0. ✓ 2 r0 U •r -0 Q 0) 1 1- lJ- r b U S- E O a) 0-0r N U 0 U APPENDIX D CULTURAL RESOURCES ASSESSMENT UNIVERSITY OF WASHINGTON SEATTLE, WASHINGTON 98195 Office of Public Archaeology Institute for Environmental Studies FM -12 (206)543 -8359 15 November 1982 Phil Frazier, Senior Engineer Public Works Department City of Tukwila 6200 Southcenter Blvd. Tukwila, Washington 98188 Subject: ' Southcenter Boulevard Archaeological Assessment Dear Mr. Frazier: Enclosed please find one (1) copy of this office's report for the above - referenced project. As per our re- cent phone conversation, I have forwarded copies of this same report to Entranco Engineers and the State's Office of Archaeology and•Historic Preservation (OAHP). I will be contacting OAHP in the next few days to verify that the report meets with their approval. Your kind attention to this matter is greatly appre- ciated. Should you have any questions or need further information or assistance, please don't hesitate to con- tact me at your earliest convenience. It has been a pleasure working with you on this project, and I look forward to our continued association. ruly yours, L Jer \ Je ann, Ph.D. Sta haeo ogist cc: Ed Berschinski Entranco Engineers Dr. Robert Whitlam Office of Archaeology and Historic Preservation Enclosure 45 Recycled Paper CULTURAL RESOURCES ASSESSMENT OF THE SOUTHCENTER BOULEVARD IMPROVEMENT AND RELOCATION PROJECT, TUKWILA,.WASHINGTON by Jerry V. Jermann A final report of findings submitted to the City of Tukwila under the conditions and specifications of a contract dated 2 November 1982. Office of Public Archaeology Institute for Environmental Studies University of Washington Seattle 15 November 1982 INTRODUCTION As a part of its continuing efforts to improve and upgrade existing transportation facilities, the City of Tukwila's Department of Public Works proposes several modifications to Southcenter Boulevard between 62nd Ave- nue South and Grady Way (Figures 1 and 2) to improve access for vehicles, decrease response time for emergency vehicles, and facilitate completion of the Christensen Greenbelt Trail. Although several alternatives are still under consideration, the currently preferred alternative, known as the "At -Grade Intersection ", involves several modifications'that include (Figure 3): (1) Widening of the eastern portion of South - center Boulevard to match the five -lane, 60 -foot wide driving surface that currently ends west of 62nd Avenue South; (2) Extending and realigning the eastern terminus of Southcenter Boulevard to link with the new Grady Way Bridge — this would require a new bridge over the Green River; (3) Realigning the transit link between the current intersection of Southcenter Boulevard and Interurban Avenue South (SR 181) and Inter- state 405 — this also would require a new bridge over the Green River; and (4) Relocating the existing T -line bridge that connects Southcenter Boulevard and Tukwila Parkway to an alignment somewhere between 66th Avenue South and a point approximately 30' east of its current location. With the exception of the two new bridges over the Green River and the relocation of the T -line bridge, con- struction of the proposed improvements will involve re- latively minor modifications of the existing ground sur- face. Indeed, as currently conceived, the new alignments will be built on fill that will be used to bring the roadways up to grade with existing driving surfaces. Construction of the proposed bridges will require limited ground disturbance for the excavation of necessary footings. 2 The proposed undertaking requires issuance of several local, state, and federal permits and licenses prior to its implementation. As part of the permit and licensing process, an evaluation of potential project - related im- pacts to cultural resources that may be located in the immediate vicinity is necessary to insure against unmiti- gated loss of significant heritage values. Recognizing its responsibility for the stewardship of such resources, the City of Tukwila entered into a contractual agreement with the University of Washington's Office of Public Archaeology (OPA) for conduct of archaeological assess- ment measures related to the Southcenter Boulevard Improvement and Relocation Project. The following report summarizes findings and recom- mendations issuing from OPA's cultural resources assess- ment of the above - referenced project. The report is divided into four major sections. The first two sections, which briefly summarize the natural and cultural settings of the project area, are the product of archival and literature review conducted in advance of on -site activi- ties and are intended largely to provide a context for evaluating resource potential and later management recom- mendations. The third section describes the techniques and results of in -field assessment measures. Finally, the fourth section summarizes our findings and offers recommendations for further management consideration. LOCATION AND NATURAL SETTING The project area is situated in the SW4, Sec. 24, T.23N., R.4E., W.M. Located in the Puget Sound Basin of the Puget Trough physiographic province (Franklin and Dyrness 1973), the geology and topography of the region owe their character almost entirely to Pleistocene glacial action. Approximately 5,000 years ago, the Osceola mud - flow swept down the slopes of Mt. Rainier into the White and lower Green River valleys before finally coming to rest just north of the present -day city of Auburn. 3 Because the prior channel of the White River was filled with mudflow debris, the river cut a channel northward, eventually joining the Green River at Auburn. During this period of channel realignment, coarse debris from the intrusive mudflow was redeposited into the lower valley as a massive alluvial fan, and finer sediments were carried beyond the fan into a marine embayment. In this fashion, the combined flows of the White, Green, and eventually the Black Rivers built a narrow delta that gradually moved northward to fill the lower valley (Dunne and Dietrich 1979). The last 75 years have witnessed a complex series of changes in'the flow patterns and course of the Green River. Prior to 1906, the river joined the White River near what is now Auburn; this combined stream was known as the White River Valley to that point near present -day Tukwila where it was joined by the Black River, whence the river was known as the Duwamish. Lake Washington had an outlet through the Black River, and the Cedar River could flow into either the Black River or Lake Washington, or both (Dalan and Wilke 1982 :3). Then, in 1906, a major flood episode caused debris to block the main channel of the White River, causing it to cut a new channel southward to the Stuck River, which joined the Puyallup River before emptying into Commencement Bay at Tacoma. Subsequent flood control measures made this channel diversion a permanent fixture of the landscape. In 1913, a dredging and channel - straightening project began on the lower Duwamish River to provide a deep waterway for oceangoing ships to come into Seattle. The construction of the Lake Washington Ship Canal and Govern- ment Locks at Ballard in 1917 caused Lake Washington to fall to a level that virtually stopped the flow of the Black River. At the same time, Cedar River was rerouted into Lake Washington to provide a sufficient flow of Water to insure continuous operation of the Locks - 4 - (Pe ce 1946:26). Subsequently, the Green River is now the accepted name for the stream that occupies the valley in hich the current project area is found. As might be expected from the discussion above, the Green River Valley historically has been the locus of fre•uent flooding. Initial attempts to control these des ructive hydraulic events largely consisted of dikes con_tructed by local landholders, but these efforts were onl, marginally effective. With the construction and sub - equent operation of the Howard A. Hanson Dam in 1962, the danger of major flooding along the river was averted at last, and the several levees that have been placed alo g the river in the vicinity of the project area have fur her reduced the hazard of flood damage. Insofar as cultural resource sites in the region are concerned, particularly those of the prehistoric per'od, the most important factors affecting their preser- vation and our ability, to locate their remains are river mea der and alluvial deposition rates. Dalan and Wilke (1982:4) report that between 1898 and 1978 the river has shifted its lateral course at average rates of up to 18 m per year, although the rate below Auburn has tended to be less than 3 m per year. Doubtless such dynamic course charges across the floodplain have either eroded or buried man h of the aboriginal sites that once dotted the land- scape. Consequently, those sites that do remain in the va ley likely are covered by varying amounts of flood - de•osited alluvium, and subsurface examination will be re•uired in most instances to locate such remains. Given that the aboriginal inhabitants of the region pr.cticed a hunting- fishing - gathering economy, knowledge of the distribution and composition of the area's flora an fauna is of considerable importance in understanding pr historic settlement and subsistence patterns. The pr.ject area and the valley as a whole lie within Franklin 5 and Dyrness' (1973) Tsuqa heterophylla zone, which occurs over much of western Washington and Oregon. The over - story is dominated by several coniferous species, most notably western hemlock (Tsuqa heterophylla), Douglas fir (Pseudotsuga menziesii), and western red cedar (Thuja plicata). In riparian habitats, deciduous hardwood species are found. These include bigleaf maple (Acer macrophyllum), red alder (Alnus rubra), black cottonwood (Populus trichocarpa), and Oregon ash (Fraxinus latifolia). A broad spectrum of understory communities are arrayed according to moisture gradients within the zone. In the southern Puget Sound area the most common species are vine maple (A. circinatum), broadleaf rhododendron (Rhododendron macrophyllum), Pacific dogwood (Cornus nuttallii), red huckleberry (Vaccinium parvifolium), Oregon grape (Berberis nervosa), salal (Gaultheria shallon), and trailing blackberry (Rubus ursinus) — several of these were important constituents of the aboriginal diet and economy. The Green River Valley supports a highly varied and abundant fauna, due in large measure to the diversity of its habitats. A variety of large and small mammals occupy the region's forests, meadows, and waters, and a signi- ficant number of resident and migratory birds also frequent the area. Of most importance to the aboriginal economy:, however, were the large numbers of fish that occurred in the streams and estuaries; for example, Salo and McComas (1979) list 44 separate species of fish for just the river estuary system. In short, the region offered an abundance of fish, game, and plant resources for its human inhabitants. 6 CULTURAL SETTING The Green River Valley has long been occupied and exploited by various groups having widely divergent sub- sistence and settlement systems. Although a compre- hensive account of the history and prehistory of the region is beyond the scope of this report, it is impor- tant nonetheless to review major aspects of our current understanding of these topics to provide a framework for assessing any cultural resources that might be located within the project area. HISTORY The first Euroamerican settlers in what is now King County occupied the mouth of the Green River in 1850 and 1851. With the opening of a road through Naches Pass in 1853, which connected the Puget Sound area with the inland portions of the Territory, significant numbers of new settlers entered the area. Between 1853 and 1855, various individuals were able to acquire land in the valley under the provisions of the Donation Land Act. Two of these, William H. Gilliam and Henry Meter (Meader), claimed parcels in the immediate project vicinity. Never- theless, a review of the General Land Office (GLO) plat maps, which were surveyed in 1861 and 1863, shows no evi- dence of structures or other improvements on either property. During the Indian wars of 1855 - 1856, local settlers constructed Fort Dent for protection in the event of raids. Situated somewhat north and west of the project area, an historic marker now indicates the location of this former fortification (Dalan et al. 1981). To a large degree, the early Euroamerican economy of the region was based on agriculture, and this was the principal focus of local land use until quite recent times. Since the 1940's, however, industrial development has moved rapidly to replace the family farm throughout much of the valley. ETHNOGRAPHY At the time of the first Euroamerican encroachment into the region, the Green River Valley was occupied by the Duwamish Tribe, whose territory reached from the river's mouth up to and including the Black and Cedar Rivers (Haeberlin and Gunther 1930; Smith 1940; Spier 1936). Actually, the Duwamish were composed of several groups, who controlled portions of the various water- ways included within the larger territorial unit (Lane 1973a) . The settlement-subsistence pattern of the Duwamish reflected the seasonal availability of the various re- sources that characterized the indigenous diet. Never- theless, the principal focus of the settlement system was the "winter village ", which was occupied by the entire group only during the winter months. These rela- tively permanent villages -- permanent in the sense that the same locality, was used for several years — typically were located on high, well- drained ground along major rivers or stream confluences. Village size tended to vary from one to three houses; each house was large enough for four to six families (Smith 1940:4). The houses were rather substantial affairs constructed of cedar planks that were fastened to a rectangular super- structure of large cedar logs (Lorenz et al. 1976:19). With the settlement of the area by non - Indian peoples, the house style changed from a multifamily to a single - family sturcture (Noel 1980:11). During the spring months, families began to dis- perse from their winter dwelling to beach areas where they collected various molluscan and other marine re- sources. Certain species were consumed immediately, while others were processed and stored for later winter use. Following the collection and curation of the winter shellfish supply, women travelled to their accustomed - 8 - root and berry gathering areas (Haeberlin and Gunther 1930). At the same time, the men took up the pursuit of fish, an activity that would occupy their attentions from early summer until November. To a large degree exploitation of the abundant fish resources of the region centered on four species of salmon and steelhead, and most of these were taken using weirs, although a variety of other techniques were also employed (Lane 1973b :1 -8) . The men also occasionally hunted terrestrial mammals, but these were not a critical part of the indigenous diet. As might be expected, housing during the spring, summer, and fall months was considerably different than that noted for the winter village. The structures were quite temporary and were constructed from woven mats laid over a set of poles and secured with strips of hide, net- tle, or cedar bark twine (Noel 1980:10). Typically, these structures were built as single - family dwellings and were either teepee - shaped or square (Haeberlin and Gunther 1930). Although available ethnographic souces list several village sites and temporary campsites within the general region, none of these is located in the immediate project area. Nevertheless, two villages are recorded a short distance downstream (Dalan et al. 1981; Hedlund 1981), and it is likely that other such sites were scattered throughout the nearby vicinity. ARCHAEOLOGY . The prehistory of the Green River Valley and the greater southern Puget Sound region is poorly understood. In large measure this is probably the result of the re- latively early Euroamerican settlement of the area and the substantial development that has occurred during this century, factors that have resulted in substantial destruction of the archaeological record. Nevertheless, 9 the relatively few professional archaeological.surveys and excavations that have been conducted in the region provide important insights into aboriginal lifeways. Three major archaeological excavations have been undertaken on village sites in the general project vicinity. The first of these, conducted at the Duwamish No. 1 site (45- KI -23) along the Duwamish Waterway, con- sists of a series of three investigations carried out by OPA under contract to the Port of Seattle during the mid- 1970's. This site, which is an aboriginal shell midden, was occupied intermittently between approximately A.D. 650 and A.D. 1600 by peoples exploiting the nearby estuarine fish and mollusc resources (Lorenz et al. 1976; Jermann et.al. 1977; Campbell 1981). Excavations at the Sbabadid site (45- KI -51), located in Renton, were conducted by OPA during the fall of 1979 and the summer of 1980 under contract to CHG International, who planned to use the•area as the site of their Earling- ton Woods Planned Unit Development. On -site investiga- tions recovered an abundance of artifacts and features that can be attributed to two separate historic villages: one occupied between 1790 and 1825 and another occupied briefly between. 1850 - 1856 (Chatters 1981) . This site is of particular importance to an understanding of sub- sistence and settlement patterns of the native population when it first encountered the perturbating factor of Euro- american incursion into the region. The third locality, the Tualdad Altu site (45- KI -59), was excavated by OPA during the summer of 1980 under con- tract to First City Equities of Seattle. Located in Ren- ton at the west end of the Earlington Golf Course, exca- vations at this site recovered numerous tools of bone and stone from a village of rectangular houses that was occupied during the period A.D. 300 -500 (Chatters 1982). - 10 - In addition to these more intensive investigations, a number of reconnaissance surveys have been undertaken in areas immediately adjacent to the project area (Dalan and Wilke 1982; Moura 1982). One of these, a survey con- ducted in 1963 in conjunction with the rechanneling of the Green River as part of the original construction of the current Interstate 405-Interurban Avenue - Southcenter Boulevard Interchange system, located a small shell midden site. Unfortunately, this site (45 -KI -6) lay directly in the path of the new channel and was completely destroyed before further investigations could be undertaken. ASSESSMENT TECHNIQUES AND RESULTS On -site evaluation of the project area was conducted by a team of two professional archaeologists on 11 Novem- ber 1982. This aspect of the cultural resources assess- ment effort was conducted in two phases: (1) systematic pedestrian surface reconnaissance and (2) limited -scale subsurface testing. In the paragraphs that follow we detail the techniques and results of both assessment phases. Initially, the assessment team conducted an inten- sive reconnaissance of all project lands in an effort to locate any remains of historic or prehistoric cul- tural activity. All available horizontal and vertical exposures were examined for evidence of prior human use/ occupation. Unfortunately, surface visability was very poor: much of the area is' covered in dense grassy vege- tation, and riprap covers both banks of the Green River in this vicinity. Consequently, no discernible evidence of cultural remains were identified during this phase of on- project evaluations. Given that it was still possible that the, area might contain cultural resources that simply had been obscured by vegetation or recent alluvium, a program of limited - scale subsurface testing was undertaken in an effort to locate any such deposits. A one -inch push tube soil sampler was used to core the area at intermittent loca- tions to a depth of 1.5 m. Cores were placed at intervals of 10 -30 m along the east bank of the Green River, and another series of borings was placed every 10 m along a transect perpendicular to the river in the vicinity of the proposed easten extension of Southcenter Boulevard that will link that roadway with the new Grady Way Bridge (Figure 3). No evidence of buried cultural deposits was found in any of these test holes. CONCLUSIONS AND RECOMMENDATIONS On the basis of both archival /literature review and direct on -site surface and subsurface investigations, we must conclude that the project area likely contains no significant cultural resources. While there is always some finite chance such remains lie buried at depth greater than 1.5 m, the likelihood of this is very low. We there- fore recommend that the project be allowed to proceed as planned. At the same time, however, certain precautionary measures should be adopted to insure against loss of any significant remains that may have escaped detection during the current project assessment. In the unlikely event that artifacts are encountered during construction, further work should be temporarily halted in that vicinity until a professional archaeological evaluation can be made of the need for mitigative efforts. In addition, notification of any such findings should be made to the state's Office of Archaeology and Historic Preservation so that they might coordinate and review possible preservation /recovery alternatives. - 12 - REFERENCES CITED Campbell, S. K. 1981 The Duwamish No. 1 site: a lower Puget Sound shell midden. Office of Public Archaeology, University of Washington, Research Report 1. Chatters, J. C. 1981 Archaeology of the Sbabadid site (45KI51), King County, Washington. Office of Public Archaeology, University of Washington, Seattle. 1982 Interim report on excavations at Earlington Park. Unpublished letter rer.'ort submitted to First City Equities, Seattle. Ma . :1 :ic.ript on file at the Office of Public Archaeology, :::i:-: ; amity of Washington, Seattle. Dalan, R., S. -Hunt, and S. Wilke 1981 Cultural resource overview anc. Green River Flood Damage Reduction; E .udj . Geo- Pecon International, Seattle. Report subm - -.L:d to U.S. Army Corps of Engineers, Seattle Liz: :..: . Seattle. Dalan, R. and S. Wilke 1982 Cultural resource evaluation of the proposed Tukwila Hotel site, Tukwila, Washington. Geo -Recon International, Seattle. Dunne, T. and W. E. Dietrich 1979 Geomorphology and hydrology of the Green River. In A river of green, Appendix A, Jones and Jones Associates, Seattle. A planning report to the King County Department of Planning and Community Development. 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. Hedlund, G. 1981 Archaeological resources at the mouth of the Black River. Report submitted to the King County Depart- ment of Public Works. Manuscript copy on file at the Office of Public Archaeology, University of Washington, Seattle. - 13 -- Jermann, J. V., T. H. Lorenz, and R. S. Thomas 1977 Continued archaeological testing at the Duwamish No. 1 site (45KI23). Office of Public Archaeology, University of Washington, Reconnaissance Report 11. Lane, B. 1973a Anthropological report on the identity and treaty status of the Muckleshoot Indians. Unpublished manuscript on file at the Office of Public Archaeo- logy, University of Washington, Seattle. 1973b Anthropological report on the traditional fisheries of the Muckleshoot Indians. Unpublished manuscript on file at the Office of Public Archaeology, University of Washington, Seattle. Lorenz, T. H., G. R. Spearman, and J. V. Jermann 1976 Archaeological testing at the Duwamish No. 1 site, King County, Washington. Office of Public Archaeo- logy,'University of Washington, Reconnaissance Report 8. Moura, G. F. 1982 Archaeological reconnaissance of the 16 acre Tukwila Bend Project. Unpublished letter report submitted to Evergreen Managment Company, Bellevue. Manuscript on file at the Office of Public Archaeology, Univer- sity of Washington, Seattle. Noel, P. S. 1980 Muckleshoot Indian history. Auburn School District No. 408, Auburn, Washington. Pence, W. R. 1946 The White River Valley of Washington. Unpublished MA thesis, Department of Geography, University of Washington, Seattle. Salo, E. and R. L. McComas 1979 Aquatic resources of the Green -Duwamish River; with enhancement possibilities. In A river of green, Appendix B, Jones and Jones Associates, Seattle. A planning report.to the King County Department of Planning and Community Development. Smith, M. 1940 The Puyallup - Nisqually. Columbia University, Contributions to Anthropology 32. Spier, L. 1936 Tribal distribution in Washington. General Series in Anthropology 3. Bantu Publishing, Menasha. r 1 •"' I" 7-• 1. 1 •-'.1"•-• — 19 — lotalsnots W01/4■••r • 1••••.• • ,f•••••••■• • Iltoto ; 16..7... • . • S./ lvall, •ei... ,,,e).1■••• .• . .. 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Irotnes I A.,- ;Ao•o• • • • 11-••0- *:5 r•••-•., 1 yort_t_t8o,,z. y••••••.5 rl-T1la• O.I. I Moe y•-.Ar TT-o•ITAI I 29•WO • 7},1- 1 ra-so• `IAN, 17- PROJECT LIMITS • STA.118+93.70 CONST.= 2M 173+07.30 R/W 1 DESIGNED BY ENTERED BY CHECKED BY PRIM. (NCR. DIST. ADM. D GAULT • 8 BTRO 1 R. BELDEN J. s...EssmIT. s. BERG. R.E. r I DATE DATE I REVISION T 57370 10 WASH T.23N. R.4E. W.M. • TI_C_O_•_•••.:11, • T3-.1•••3.03 FED.A10 PRO.1.00. I SE 1/4 NE 1/4 SEC. 23 GOV'T LOT 1 NE 1/4 SE '/» SEC. 23 I SW 1/4 NW 1/4 40 GOV' T LOT 5 runvf o.t• SAIRAL. G.T. TOTAL CLOAvE OAZ• ST•11. Celt. I la•Ge161. Otto • le•C/. • CA 1.• ;T.," AT,Yrr no, na.rr NW 1/4 SW 'A SEC. 2.4 GOV' T LOT 10 INTERVRB. AVE-127.75.00 CONST,./ Zu .5A.20,04 AVAA. ALABL LINE 3.3.2426- FORT DENT R.S. 0.00 / • 1 04TC11 TO -.51E.ET XX Ti-AA,OR P L.17351.1 TMS-AZ.00 PAM. 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CP co b A 0000 ..., t ,.r,ea O '[.e. 3....' r D u: °m Svv13a 33VN vaO cn m z m a3 0 z P1 CONCRETE PPE COUPLING AND ANCHOR ASSEMBLY DETAIL i • !, 1 •• ,-,;' r 1. ... I . (-7'. s' ..:.:. I' •E,-- ,--.1-.:.: 1.— p '' \ ■ i ' l' I .: .,, I. '.• • i )''.7 's.''. o . • , _ ,--- - '• / - \ 1;2 I ■:- 7 ! ' ' • • ' :73 I t I • ' ',.1,77. • I i , 0 7,I - ' I L.„, I ■ IP ; . : • ' --: = • c• , / , o I ' I ( 1 ,,,'. / . 1:•. i71 .1:: • i ' : ; ‘,6 3:3-3 fi 3 A AN ^1 z 31IdObd 3ObNId8O Art 0 rIo rIo 7.1 .4Z 1,1 z -4 rIo Xl . • i GRATE 10,1.11 7471: 1119PE A mot! 711177-L74,.34;.'60-±11L.-- OW VA VPUIDTE SCA: 4;15. 00'741.1 ELM 24.12 ; • ; P [1. 22.149 -- 0 7372 • ELEV. 25.60 CB TYPE 1: CAE V. 26,15 • ...... !. • WE. a • .11. 22.60 , ,SCB 33425 1204 141.1 . 41.. 3339 ; \It CPA TE ,44.14T ) 4119244._02,FAIII ELEV. 25.91 . . . 1 4 i6-33.25 001)! rim UM 14.00 • 0 11;27.30 ] , I •N :• [1.24,50 1 ; 4 I IV LA Ul An 0 1 • ' I . I I I I ! i I l• 1710 ' -----:J:t‘i:717 CB 1404 4 • • • 16. 443 404 4.3. 11.1 (1 (0. 44.07 13 0v451 j141' 114 • ELM 11,10 a 0 rt. 29.00 11. 27.00 !..4 AL 26 00 • • `4 • - CR 10)7 1, )1." (Lt 2, 17,1; 0170. 14.1? 0 71E4. 12.10 (45:i1q614.4 El EV.10,41 sS19.4114!f!iri;3TI.1 [210, 00.20 7,";.7X.,,,211,91-5°4 147 111066111 CIO 57C1,0, AI 0011041 !Mtr;r7'.( 1 04' 50 [14 ELEV. 34,10 I..51.12044.1 111 01.1 , ELEV. 14.00 C0 7101 t 1-A . 4 .. • • -- ELEV. 14.12 - -4- --444:45:10•1i0.140. 41.4 . '12.. J , ni.-:, .td•o.? 64' 01.4 0 !IV LIEVELED E.4.0 SEC no% Al 0017011 t•:■' I _ • E.; _ 6) 51123 7I:21•1:1 Al 4;444' An 1 19, 1":.:23.::- 0 627 0 40(1(11 14.0 4.,E21.05 444 nolFAIL ip BIALA? PO ••44. a 04.46,t) AA4 0 0 61(0. 3...s0 : . .".- ............ .: - . -- 4; ;;,..■!i ,;•.; Et24.2i.1 LI ',':1, t.;,i3 ;.. '.:1.1' ■■.. Xii: o 11 _J Tr 5. 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"a1,1 ova y w = L AL /BL 119+27.26 ).'"2b1�M� t1.1 1= L I nV I L J 2M 164 +26.04 = U V M SOUTHCENTER BLVD. 0 +00 JON-111;P 1i-- 5. 0iit = 9 - 1 (a! '� Ill) .1 srxl 1'a1 0l NI 1-U_ = -aaalv aa }tsV 1-.,02.?10 = rc (.- ,.' CI 00111 NO_LLa> :7 '' $ i'D •nc n) aid -v-YY -.11V91913 ,...1 GRADE INTERSECTION N '.T. 1 LL��N �9 /'>' 2M STA.I57 +98.77 LIMITED ACCESS C,• TYPE A APPROACH Cn x EXCESS R/W / 0 /wOwl 0 a O I- W Z 0 J O cc Z W 0 0 O W f- Z ci .cq p p 3 I s 0 In1JU nJiW inJU tUJJ Cn (SL +L 'V1S 11) 0 0 0 0 r 0 —4 F.4.‘ r - II II • / . • 1 I /Z 7 . z I . • ! 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ELEV. 41.39 ELEV. 49.41 ELEV. 41.28 VERTICAL Pojtli * npaPTA1N t4AU 'Co Iz.EMAIN RETAINING — WALL (SEE THIS SHEET) Reba of PULL To se. opt 117 +00 ELEV. 40.73 o OUTS) .j FAC OF WALL ROADWAY SURFACE 0 CURB LINE j#6 DOWELS E.F. 3" 9" SPA. o 9" MAX. EACH FACE 3" 301 *8 DOWELS PIER 1 CURTAIN WALL ATIO vi i J AL -BL LINE t. ) , ( 3E, I • --- • / - • to GREEN RIVER — 0 0 rn • —1 \N- 7.41.2V^ 8 r„ LI I 0 m 0 frAiRTAIT 370CagrrAS' i ;;. Y U z z 1- AL /BL 119 +27.26 = ' 2t /1 /0►' i1ii.i.'(]`t1 1, a " 1 -102161VVV = L 2M 164 +26.04= ►YMo -1i 1l11 = L SOUTHCENTER BLVD. 0 +00 JL N-1sall- s?141t ' 9 0aAaJ1.7 t10.1 1111%1oN. 11141 . S fK I*7 ado =C A.• a0001 Nal.1 -01) = -: 'lsn) a9eLV-vv GRADE INTERSECTION o a 2M STA. 157+98.77 LIMITED ACCESS c,. cry TYPE A APPROACH DfltJ h\' EXCESS R/W • UJ w o1- ow z cn 0 O aw O O 0 Pr/Ter/77 z Zu t- O � z m 0 > 0 v m fl?fl ti M/b SS33X3 .' H3VOIddV V 3dAl /1.,, cb SS333V 0311WI1 LL'86 +LSI 'tl1S WZ o .�� �'� -s? N01103S I31NI 3OV JO Gi- `- . I = 61GLEAF MAPLE (USU. Gl�& ■1/410 2 : Go1TON IUOOD .-, = OgE-GE)f1 /NstA `t = 66t' ALP . 5= Tai1N -11ot4gl.trTCIN c, vr:) 6 : 4-VYK- ✓ctter7,1 or 00 +0 'OA"1 2131N33H1llOS 17T It,LllW *0'92 +1791 112 W = 92'LZ +611 19/1 I1 0 0 g : P� G! 1Ei-ZY V' o -n M/ VRo14e.. � A 2 30 nz rn o S /A• ' 0 O K1 CI 6 f1CLV •ij ,1r ?k /9Z , -1 W fn) -1 PLC cit OOOO 016 1,10110 153110 PLANT SCHEDULE- PL4NTII ww kr5 0 6 13 '4! :I 13 '‘.1) . n . .. ,, 9 9 ::■ .., n r:1 6 „ „ „I j ;■. .0 .0 8 , a b Ei :se v 43 ' 0. • 5' . „ omuovi:;73,53U,a,%:Aaa' Z11/7101 IWO q."1 DZCO,iJ Jr. r•I' :•1' x 1.1 ',.... ui pt 1 • r, e .... g11111It V 0) zi rr 0 ',."; . :C 0 (i) ] cr.'_, ou LL fl " „ —J F.11,111 - • ;„, /('.• El 3 Sou, bronk. Rpok•vo.-c. Cot.,. Ifr,u9a. Rept She,' 11.114bens.en s irrehrbobry .1,4 for abb.. I t.c w7,- •c1.1•4 t 0,, De, Protect., .V.S •,re 1 (001.4 0,1400 574751,41—,0009 NcuRr Of r,N tCAT CIR SCR Slo Le • 114.1 (34 fee, 112,resiSriliebb) (0 VP. l• 48 (Gob.. 0,9n•of re [ont) FL: 8 1:1 2 03fl0L+dd7 N71d % t , 1)174\\\ , \\ \\r .c1 \aiN" 7,\ • • • :\ , -.. -. _ . . 7 , . s , ..-- . . • . ) ss \ : c.p.ct, \‘ 1 ;•.:,--;%'"------....:;,,,,s ,,,,\ ` ' S 0, . ,., s . 0, :•t NN 1 ti NOISIAIO AV /,iHOIH 29•05 • I• t/eg ••.3 02 • ,•■• .10,0 t1/...• JO 4S, •••■• ,twent•,, St,/ SCA ••••0 50,5 •-•rt .to • \ 1 :o 0 -n ID -." . r----- a • • 43 ia il , !i41"._i___ 4'0 i- i R ri ''.0'• ID ID ID :0 21 0 cr, U) o c x - 0', - XI m m M! ID Z U) rti r < 2 z m m z z G-) m ryr 1 , oj •-0 2 a, 71 'Inn -s Z rr i 0 .0- 2 o -ss GO ID r rTl e -I ro ._ i.o o 34a? ,3- -- -n. mf•I 71 I-- ,_%•,.. r 4; In re"si o e. IA , ?,,• CI • o f‘ o t .14s. ...•,A m • Oroja,/' 01..0:q.ti 01,,,,f 1:43 4 011.:1 (0 AN, healoto N01133$ SSOil3 1731dA1 0 c, 0• 0, 0 00 • • `ii3 340w. 14 ' ItglAV•1 i'Vx• ,,tVt Gre,nr, Rwer SHRUB PLANTING DETAIL 5 < >c<'r LANDSCAPE DETAILS FEDAID PROJ.NO g 0 F11 a Ff. ZeigtOt 0M011-1 9Z00./P■s10 tit 1- LJj 0 L.:. z 1J-1 lz-1 tal 111 0(11 V, 7 V, (5- o z — cr 0 0 LL1 at 0 , 0 0(0 1.1. \ 3-1 133.5 335 3Ni1■3313/13 1-1 1111.5 135 1'311,01Vet REST AREA LANDSCAPE PLAN tA o LJ 4 ; .3 z 0 ceG U 0 c� ui wm z =o0 �i"��rr z 41 WmO WJO 0_Z0< {, Q v� �� 1+102 <0J 04i OKaW WWz ZmoZZO g zzz0 a °<6P09° LLc.� j1 OZ0 gala -x ZC1 w.. .e Fi� ,awDw°d J _, WO-ZU WZ �U t li O 00 d; ZCL0 s�� I-o0-o 5 mg 3 F � �0 pOuzizzOZ tnlnz �U O -W wOL 0038 1—w E-Dnd-I 01,`� o 1-- c�>0¢n�0 �g CL CC °wr zw.?( wc1. gaj�vfdw 0N0m oW1-IZ F zcwiw�z WCC CO Z�UUO� 0 0 fnV Z�-QjmES/- �O� c0i3�a47n� O -L U) (ce -c� c010�0r0a3 W 0 z 1-1 133HS 335 3NI1H31V1Y ga nYn ESQ F a iza�p� a ^� 7�du O c.) Q CC ti z W J 0 0 'a a TABLES (TTY.)- ONE(T) TA 1 -1 133HS 33S ]Nf1•3LVN 0 0 0 II4 6 zE /0/01 OMO4C•1 9400/114./. \ \ • • " \ • \\'\ c\ • -- '. '..:',,, - . „ • - •-•,`'.:,,,,.. • ,, . ., • . "i : '. • - 1: - - e.:' -;:: • ..;:: ...1 1 1 '' ../ , , ,.., ,,, -. • -..-.‘... -......,..-...t.,. ....:, ... -.,,....,,,,:.,..,:......., ,;._ . • . . ,, -:,\ r....., ...„,. 2.,...2.1 •- , , ..,:..,....,:-,- -,,,--, • --% t. 1 •-•,..,` ---------,,,i. - ,..-.. `,.. s , --._., ...: • CPU 1,1•41I 1 V1.3;11.3.3.,Ri.fo r, . . . 611 g: 0 0 0 ao m m m rn OJ 7:r 0 c-) m 0 rfl D uu 03 0 01 :13 7.1 r, -u < --I Z 0 73 D-■ grir 0 '1' • P r- - •no.r, u-r 2 • : 9 og 1 i it / Jac **/ l � 1"Al fr 0.. oc 0 Z O V O ALTCR MATS ve 1 f og :g 1 I I 1. ALTetw ATE v t 1 • a...ww+..o '4.'r Apse 11...r< C c 2 cY5.3 Co CC) v U z asdiv • I 44 Mal ....�� .ern T nt_..Jn7N Sopini iA MIS !A. I gwM.Sd Iv nn.c AC V IC KA l AMP() n•TC. 12cuwtnN [n±� r4y�Ow.i • IlrArwed W -1; 7 t V ay l '11"1"Iii" Msp M/kMq m TRN 0 rn 0 0 7v 0 4 N g o' • A TUK WILA W 0 Z 0 100 200 300 1 Nominal Scale - Feet 4 NORTH ENTRnNco Engineers N., .�, uvc.tin... w. C0.4ttLM4 PARKWAY City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way To Fort Dent Park 7 Figur EXISTING A r, UKWILA cc w 3 O Za 0 100 200. 300 1 1 Nominal Scale -Feet 4 NORTH ENTRANCO Engineers PARKWAY 0 C 2 W a City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way To Fort Dent Park M0f3TER Q' l Figure 3 EXISTING ALIGNMENT m ALTERNATIVE 1 No Build Widen To 5 Travel Lanes IZ' I �% / t i,,--._.. r.e. w.r 151 I:I� io r AL Improv, k; ) New Alignment New Bridge 1111111111111111 Roadway To Be Closed ALTERNATIVE 3A High Level Bridge '.': 77! New Alignment New Bridge IIIIIIIIIIIIIIII Roadway To Be Closed ALTERNATIVE 3B High Level Bridge New Alignment /-% New fridge IIIIIIIIIIIIIIII Roadway To Be Closed 0 r... 4 \ /r 4ll `-1 AL' At-Gn NORTH ENTRANCO Engineers City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way Fig( PRO SOUTHCENT ALTEF /am 0 ALTERNATIVE 1 No Build Widen To 5 Travel Lanes r ALTERNATIVE 2 Improve Existing System New Alignment New Bridge IIIIIIIIIIIIIIII Roadway To Be Closed 1 ALTERNATIVE 3A High Level Bridge :Vr 1 l� / T7771_ New Alignment New Bridge IIIIIIIIIIIIIIII Roadway To Be Closed ALTERNATIVE 3B High Level Bridge 9 \ t o-r �.. ro-• �1� 1. //r New Alignment New Bridge IIIIIIIIIIIIIIII Roadway To Be Closed ALTERNATIVE 4 At -Grade Intersection v NORTH ENTRANCO Engineers City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way Figure 8 PROPOSED SOUTHCENTER BOULEVARD ALTERNATIVES *NORTH ENTRANCO Engineers . w.... �.Y •'�• .wn tw...artwt.t any CO.SYttawn City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way To Fort Dent Park ONs7ER/ Q� Figure 6 1990 AVERAGE D ALTERNATIVE :I �T uKwiLA 18,480 NORTH ENTRANCO Engineers e........(......n...wWs...n. cwsuiu.rts LC W 3 oa PARKWAY City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way To Fort Dent Park ONSTER lO/ Figure 6 1990 AVERAGE DAILY TRAFFIC ALTERNATIVE I NO BUILD 36,910 22,760 18,230 31,080 17,280 4NORTH ENTRANCO Engineers (nvMpwu(r�V �yUtuyyp�iat�py coysultwii SOUTHCENTER 12,540 BOULEVARD 93,570 23,250 City Of Tukwila 19,040 SOUTHCENTER BOULEVARD 62nd Avenue South.To Grady Way To Fort Dent Park 28,100; STER 19,320 30,850 32,430 Figure 1990 AVERAGE D ALTERNA REALIGNMENT SOUTHCENTER NORTH uola ENTRANGO Engineers City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South'To Grady Way To Fort Dent Park Figure 7 1990 AVERAGE DAILY TRAFFIC ALTERNATIVE 4 REALIGNMENT AT GRADE 0 100 200 300 Nominal Scale - Feet NORTH ENTRANCO Engineers City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way To Fort Dent Park MONSTER Figure 1981 AVERAGE WI 4. 0 A b 0 100 200 300 1 $ 1 t Nominal Scale • Feet NORTH ENTRANCO Engineers To Fort Dent Park City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way MONSTER � � Figure 5 1981 AVERAGE WEEKDAY TRAFFIC 0 100 200 300 1 1 1 Nominal Scale - Feet 3 ENTRANCO Engineers ao.v vaao.socoautooft CO*SSULTANTS 414:111 ow...••• dm. ••••••=1 LEGEND Mixed Deciduous Trees Mixed Grasses, Scattered Shrubs Landscaped Area (--) Area Of Vegetation Loss /›IeteaarCe , •• =I MUNSON." Proposed Landscaping BOULEVARD cr 0 City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South'To Grady Way To Fort Dent Park Figure 4-A VEGETATION IN PROJECT AREA w n�� UK WILA cc w 0 0 z -4 m i 3 a - MIMS -NE PARKWAY cr w 0 0 z To Fort Dent Park T Connection Point Of Proposed Trail With Existing Sidewalk To Fort Dent Park � J Connection Point O+ i Proposed Trail With Existing Christensen Greenbelt Park G� NORTH ENTRANCO Engineers Realignment Of Existing Roadway E New Bridge Structure Widen Existing Roadway , i0,.00,11 Close Existing Roadway • • • Proposed Trail System — — Sidewalk/Bikeway City Of Tukwila SOUTHCENTER BOULEVARD 62nd Avenue South To Grady Way PROP(): to z N co NORTH ENTRANCO Engineers n� TUK WILA Q w 0 0 z �— _- IMEM i. PARKWAY Realignment Of Existing Roadway New Bridge Structure —rrr, Widen Existing Roadway „01,,;11',11 Close Existing Roadway • • • Proposed Trail System Sidewalk/Bikeway To Fort Dent Park ti T Connection Point Of Proposed Trail With Existing Sidewalk ., To Fort Dent Park • FAIRE7411 i r Cr w oIw DIY z City Of Tukwila • AVE SOUTHCENTE,R BOULEVARD Connection Point O': Proposed Trail With Existing Christensen Greenbelt Park TER 405 Figure 4 62nd Avenue South To Grady Way PROPOSED ALTERNATE J z 11 l:I w r1 w f'1 w -C • • I! '1 1 :1 1 c. • ,7 r CD 2 L) mZ -<m LIMITS OFI TRAIL .n? GRADING i1 c x,•- • ... • •11 poi. :ti z \ `\gin z "' - +,, \:•'- -;_• I \. \' \ } \.�' _:.' . \('_•fir, \`\ \ \\ \ �\ \k\,. \\ EXIST k. \\1 \ V\ `' , \ \ (DO .}`,j\ \\ \ \\� ,\ }•rooQ'boCOCOCOwto , \ \\ • 11„ I 1\.,:\ I I ln• p \ \ \ I [\, N \ \ vri }, \\ \ \ _C\ \ \ VL \V V V" • t • 000004. 1 g it 1 1 \\\ 11` I \\ . !\ >i' , . . t11 O r \ ` \ N .1 ( )- v F. 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