The URL can be used to link to this page

Home My WebLink AboutPermit PL14-0030 - ELI ZEHNER / CHS ENGINEERS - KING COUNTY WATER DISTRICT 20 TREE REMOVALSKC WATER DIST EASEMENT WATER MAIN REPL. PL14-0030 L14-0046 TREE REMOVAL City of Tukwila Jim Haggerton, Mayor Department of Community Development Jack Pace, Director August 29, 2014 NOTICE OF DECISION TO: Eli Zehner, Applicant Ken Stickley, Agent for Owner King County Assessor, Accounting Division Washington State Department of Ecology This letter serves as a notice of decision and is issued pursuant to TMC 18.104.170 on the following project and permit approval. I. PROJECT INFORMATION Project File Number: L14-0046 Applicant: Eli Zehner, CHS Engineers for Water District 20. Type of Permit Applied for: Tree Permit Project Description: Request to remove 22 significant trees in order to replace an 8 inch cast iron water main and pay fee in lieu of planting. Location: Tukwila International Blvd and S 125th Street Associated Files: PW 14-0087 Comprehensive Plan Designation/Zoning District: Commercial/Light Industrial II. DECISION SEPA Determination: The City SEPA Responsible Official has previously determined that this application does not require a SEPA threshold determination because it is categorically exempt. Decision on Substantive Permit: The City Planning Supervisor has determined that the application for a Tree Clearing Permit does comply with applicable City and State Code requirements and has approved that application subject to payment of fee in lieu of replanting. III. FINDINGS This tree clearing permit application is a request to remove twenty two significant trees to replace an existing water line. The project involves abandonment (and removal where necessary) of approximately 1100 lineal feet of old 8 inch cast iron water main and replace it with an 8 inch ductile iron water main. The water main alignment runs east west and generally follows the S 125th Street right-of-way and about 500 feet of water main replacement is proposed along a vegetated steep slope on private property within city of Tukwila. TMC 18.54.130 (3) has a table listing the tree replacement ratio. Diameter of the existing tree removed (inches) Quantity proposed to be removed Species Number Replacement trees required 4-8 10 Alder, Locust 10 8-12 7 Alder 14 (2 per each tree removed) 12-18 1 Alder 4 (4 per each tree removed) 18-24 1 Alder 6 (6 per each tree removed) 24+ 3 Locust 24 (8 per each tree removed) Total replacement trees required=58. Due to the location of the water main and conflict with utilities it is not feasible to plant in the same location as the removed trees. Instead the applicant has paid fee in lieu of the replacement trees. Per TMC 18.54.140 3C, the director can grant an exception if on-site planting of all required replacement trees is not feasible, and the project includes an equivalent contribution in funds and/or labor and materials for off-site tree planting as jointly agreed by the applicant and Director. The applicant has agreed to pay $98 per replacement tree for a total amount of $5684. Also, per TMC 18.54.140 (2) for an exception all of the following criteria are met: a. Strict compliance with the provisions of this code may jeopardize project feasibility or reasonable use of property. It is not possible to plant trees due to conflict with the water main utility. b. Proposed vegetation removal, replacement, and any mitigative measures proposed, are consistent with the purpose and intent given in this chapter. The applicant has proposed to pay fee in lieu of instead of planting on site due to conflict with the utilities and therefore complies with the intent of the Tree Chapter. c. The granting of the exception or standard reduction will not be detrimental to the public welfare or injurious to other property in the vicinity. The granting of the exception will avoid future conflict with the tree roots and the water main thus prevent damage to the properties in the vicinity. IV. YOUR APPEAL RIGHTS The Decision on this Permit Application is a Type 1 decision pursuant to Tukwila Municipal Code § 18.104.010. Other land use applications related to this project may still be pending. One administrative appeal to the City Hearing Examiner of the Decision on the Permit itself is permitted. A party who is not satisfied with the outcome of the Hearing Examiner appeal process may file an appeal in King County Superior Court from the Hearing Examiner's decision. Page 2 of 3 V. PROCEDURES AND TIME FOR APPEALING In order to appeal the Planning Supervisor's decision on the Permit Application, a written notice of appeal must be filed with the Department of Community Development within 14 days of the issuance of this Decision, that is by September 12, 2014. The requirements for such appeals are set forth in Tukwila Municipal Code ch. 18.116. All appeal materials shall be submitted to the Department of Community Development. Appeal materials MUST include: 1. The name of the appealing party. 2. The address and phone number of the appealing party; and if the appealing party is a corporation, association or other group, the address and phone number of a contact person authorized to receive notices on the appealing party's behalf. 3. A statement identifying the decision being appealed and the alleged errors in the decision, including any specific challenge to an MDNS. 4. The Notice of Appeal shall identify (a) the specific errors of fact or errors in application of the law in the decision being appealed; (b) the harm suffered or anticipated by the appellant, and (c) the relief sought. The scope of an appeal shall be limited to matters or issues raised in the Notice of Appeal. 5. Appeal fee per the current fee schedule, additional hourly charges may apply. In addition all hearing examiner costs will be passed through to the appellant. VI. APPEAL HEARINGS PROCESS Any administrative appeal regarding the Permit shall be conducted as a closed record hearing before the Hearing Examiner based on the information presented to the Planning Supervisor who made the original decision. No new evidence or testimony will be permitted during the appeal hearing. Parties will be allowed to present oral argument based on the information presented to the Planning Supervisor before their decision was issued. The Hearing Examiner's decision on the appeal is the City's final decision. Any party wishing to challenge the Hearing Examiner's decision on this application must file an appeal pursuant to the procedures and time limitations set forth in RCW ch. 36.70C. If no appeal of the Hearing Examiner's decision is properly filed in Superior Court within such time limit, the Decision on this permit will be final. VII. INSPECTION OF INFORMATION ON THE APPLICATION Project materials including the application, any staff reports, and other studies related to the permits are available for inspection at the Tukwila Department of Community Development, 6300 Southcenter Blvd., Suite 100, Tukwila, Washington 98188 from Monday through Friday between 8:30 a.m. and 5:00 p.m. The project planner is Minnie Dhaliwal, who may be contacted at 206-431-3685 for further information. Property owners affected by this decision may request a change in valuation for their property tax purposes. Contact the King County Assessor's Office for further information regarding property tax valuation changes. .14 Department of Community Development City of Tukwila Page 3 of 3 Aspect CONSULTING June 19, 2014 Eli Zehner, P.E., Project Manager CHS Engineers, LLC 12507 Bel -Red Road, Suite 101 Bellevue, Washington 98005-2500 Re: Revised Geotechnical Letter Report Project No. 140184 Dear Mr. Zehner: rECEIVED JUL 15 20X , )E VELCE, ENT As requested, Aspect Consulting, LLC (Aspect) completed a limited geotechnical evaluation for a portion of the subject project. The overall project involves the abandonment (and removal where necessary) of approximately 1,100 lineal feet of old 8 -inch cast-iron (CI) water main; and replacing it with 8 -inch ductile iron (DI) water main, with restrained joints. The water main alignment runs east/west and generally follows the S. 125th Street right-of-way, with the western portion within the City of Burien and the eastern portion in the City of Tukwila. The replacement pipe will be installed in a new trench running parallel to the existing water main alignment. To the extent possible, the existing water main will remain in service during construction of the new water main. Site and Project Description Our geotechnical engineering evaluation is limited to the eastern approximately 480 -foot portion of the water main alignment, which extends from the Burien/Tukwila border to the east to an existing valve cluster located just west of Tukwila International Boulevard. Figure 1 is a Vicinity Map, and Figure 2 is a Site Plan showing this portion of water main project alignment. Our work included a site reconnaissance and review of proposed water main replacement plans, a field subsurface exploration, geotechnical analyses, and preparation of this report. The purpose of this study is to satisfy the City of Tukwila's requirements for a geotechnical engineering report, for the portion of the project within the City of Tukwila. The ground surface along this portion of the utility easement (within the City of Tukwila), is an unpaved/unmaintained vegetated area. At the time of our site reconnaissance, KCWD20 has recently cleared the easement of blackberries and saplings. A sanitary sewer also occupies the utility easement. Existing manhole rim and pipe invert elevations for the sanitary sewer shown on the CHS plans indicate the sanitary sewer is typically about 8 feet deep. The new water main will be installed in a shallow trench, with typically 3 feet of soil cover over the crown. Therefore it is anticipated that the water main construction should not affect the sanitary sewer. Surface Conditions The ground surface along this portion of the project slopes down to the east toward the Green River Valley. The topographic base map for the project site indicates the existing ground surface at Elevation +208 at the Burien/Tukwila boundary, and Elevation +112 at the east end of the project, Aspect Consulting, ILC 401 2nd Avenue S. Suite 201 Seattle, WA 98104 _206.328.7443 www .aspectconsulting.cam Mr. Zehner June 19, 2014 Project No. 140184 for an average ground slope of 20%, or 5H:1V (horizontal:vertical). However, a portion of the alignment is inclined more steeply, at 50% or 2H:1 V, and with about 10 feet of vertical relief. At the local "toe" of this steeper portion of slope, a localized drainage swale exists. This appears to be an ephemeral stream, conveying storm and surface water runoff downslope during rainfall events. General Geologic Conditions The geologic map of Des Moines 7.5 -Minute Quadrangle, Washington (Booth and Waldron, USGS Scientific Investigations Map 2855, 2004) indicates the project alignment to be underlain by Vashon glacial till (Qvt) to the west and pre -Fraser deposits (Qpf) to the east. Both of these soil units have been overridden by glaciers, and as such, they are very dense/hard, and exhibit high shear strength and low compressibility. Subsurface Conditions We explored near -surface soil conditions at three locations using a hand auger. The hand borings, designated HH -1 through HH -3, were advanced by the undersigned geotechnical engineer and a staff geologist, at the approximate locations indicated on Figure 2. Soil conditions encountered in each of the borings are described below: Aspect hand boring HH -1 was located near the east end of the alignment at approximate ground surface Elevation +118. The existing ground surface is gently sloping at less than 20% in this area. At this location, we encountered very silty sand with gravel, and brick fragments and plastic debris. We interpret this material to be fill, likely related to site grading development for the adjacent office building to the north. We were unable to advance the hand auger deeper than 12 inches at this location due to refusal on coarse gravel within the fill. Aspect hand boring HH -2 was located just downslope of a cluster of three existing water valves, at approximate ground surface Elevation +160 feet. The hand boring was intentionally located north of the existing easement property line so as to encounter and explore native soil. In this boring, below about 6 inches of duff and surficial topsoil, we encountered medium stiff, olive brown, fine sandy, non -plastic silt. The silt graded downward with depth to a more grayish brown color, with less fine sand content, and increasing plasticity. At 4 feet the plasticity increased to the point where it field -classified as a lean clay. Based on probing (with a 1/2 -inch diameter steel rod) the material is medium stiff to stiff. We interpret this material to be native pre -Fraser fine grained deposits (Qpff). This hand hole was terminated at a depth of 4 feet. Groundwater seepage was not observed during the time the hand boring was left open. Aspect hand boring HH -3 was located just east of the existing ephemeral drainage feature, at approximate Elevation +198 feet. The hand boring was advanced to the north of the easement, in a blackberry area to avoid existing trench backfill and encounter native soil. Below duff and topsoil we encountered very dark brown sandy silt with coarse gravel and organics/roots. At 18 inches, the soil transitioned to very dense very silty sand to sandy gravel. Based on probing of the soil matrix, this soil is very dense. We interpret this material to be Vashon glacial till (Qvt). The hand boring was terminated at a depth of 2 feet due to auger refusal on coarse gravel. Groundwater was not encountered while the hand boring was left open. Page 2 Mr. Zehner June 19, 2014 Project No. 140184 Conclusions and Recommendations In our opinion, the proposed water main replacement is feasible and providing the recommendations herein are implemented, there will be no reduction in the stability of the site or adjacent sites. The following sections of this report address each of the required sections of the City of Tukwila's Geotechnical Report Guidelines (Bulletin B4, approved 04.24.04). Slope Stability: The City of Tukwila sensitive area map depicts this area as having moderate to high landslide potential (reference: www.tukwilawa.gov/maps/Sensitive%20Areas.pdf). This city- wide map appears to have been created based on large-scale aerial and geologic data. The City defines high landslide potential areas as having slopes between 15 and 40 percent and being underlain by relatively impermeable soil or bedrock. Based on our site-specific evaluation, we characterize this site and slope as having a low risk of landsliding. The native glacially -consolidated units underlying the site (glacial till and pre -Fraser deposits) have high shear strength and, combined with the relatively shallow slope inclination (averaging 20 percent) across the site, the risk of slope instability is very low. There were no signs of recent or latent slope instabilities along the slope, and we are not aware of any historical landslides in this vicinity. The water main replacement does not involve any changes to site topography and therefore the stability of the site will not be altered by the proposed project. However, experience has shown that on sloping sites such as this, the introduction of pervious pipe zone bedding material can result in unwanted groundwater seepage, which often daylights as a spring somewhere downslope, leading to localized soil erosion. To prevent this, periodic check dams should be constructed in the trench backfill, see Check Dams below). Seismic Considerations: There is no design code that requires buried conveyance pipelines to be designed for seismic loading conditions. However, some of the larger utility districts (such as Seattle Public Utilities) evaluate their existing infrastructure and pipelines based on a probabilistic design earthquake associated with a 10 percent probability of exceedance in 50 years. This design event has a recurrence interval of approximately 475 years. Probabilistic seismic hazard maps published by the United States Geological Survey indicate the 475 -year design earthquake at this site would be a mean magnitude of 6.7 event with a peak ground acceleration of 0.23g. The site is underlain by unsaturated, glacially consolidated soil. Earthquake -induced soil liquefaction and lateral spreading do not represent hazards for this site. Because the site inclination is relatively shallow (20 percent average), the risk of earthquake -induced landsliding is low for this site. Based on our experience and geotechnical engineering judgment, any quantitative slope stability analysis would predict static and seismic factors of safety greater than 1.5 and 1.2, respectively. Moreover, the proposed water main installation will not change the stability of the site. Site Trenchwork: In our opinion, the proposed water main installation can be accomplished using conventional open trench construction methods. Glacial till is known to contain cobbles and boulders; the contractor should be prepared to deal with such potential obstacles. The majority of the pipe will have soil cover of 3 feet and thus trench depths of about 4 feet. Per state law (i.e., WAC 296-155 Part N) temporary excavations exceeding 4 feet in depth must be Page 3 Mr. Zehner June 19, 2014 Project No. 140184 sloped or shored. The existing site soil classifies as Type B Soil; temporary sloped cuts in Type B Soil should be no steeper than 1H:1V. Flatter slopes may be necessary where groundwater seepage exists. The localized stability of temporary open cut trenches is the responsibility of the contractor. Pipe zone bedding and backfill material should be a uniformly graded granular material which conforms to the pipe manufacturers recommendations. The on-site soil is unsuitable for pipe zone bedding and imported material is required. For subsequent trench backfill (i.e., above the pipe zone) we understand that KCWD20 desires to utilize on-site soil. The on-site soils contain a significant portion of fine-grained materials, or in some cases they are 100 percent fines. These materials are extremely moisture sensitive and as such, they are very difficult to place and compact during wet weather conditions. We therefore recommend that construction be completed during the summer months. These native soils should be placed in horizontal lifts and compacted to a firm or dense condition. Because the site is an undeveloped wooded area, a quantitative relative compaction standard is not necessary, in our opinion. Check Dams: In order to prevent groundwater seepage from developing within pervious pipe bedding material along the trench, check dams should be constructed at approximately 100 -foot intervals along the pipeline. Low -permeability trench check dams can be constructed by blending Portland cement with trench backfill materials. We recommend that ten percent dry cement (by weight) be added to and uniformly mixed with pipe zone and subsequent trench backfill materials. The soil -cement mixture should be thoroughly mixed, moisture conditioned to begin the cement hydration process, and promptly placed under and around the pipe. Each trench check dam should be about 2 -feet thick (parallel to the pipeline axis), and should extend from trench bottom up to 12 inches above the pipe crown, and across the full width of the trench. As an alternative to cement -amended soil check dams, the concrete block anchor shown in detail DS -12 (Pipe Anchor) of the City of Tukwila Infrastructure Design and Construction Standards, 4th Edition, 2010, would also be sufficient. Limitations We completed this geotechnical study and prepared this report to satisfy the City of Tukwila's geotechnical requirements for a public works permit approval. The scope of our work was limited to a review of existing information, a limited site reconnaissance and subsurface exploration program, and limited engineering analyses. Subsurface conditions encountered during open trench construction may vary somewhat from those encountered and reported in our explorations. Such inconsistent conditions can occur in the natural environment which may not be detected by a geotechnical study of this nature. If, during construction, subsurface conditions are encountered which vary appreciably from those described herein, we should be notified to review the situation and to determine whether any changes to the recommendations in this report are necessary. Within the limitations of scope, schedule and budget, Aspect attempted to execute these services in accordance with generally accepted professional principles and practices in the fields of Page 4 Mr. Zehner June 19, 2014 Project No. 140184 geotechnical engineering and engineering geology in the area at the time the report was prepared. No warranty, express or implied, is made. The scope of our work did not include environmental assessments or evaluations regarding the presence or absence of wetlands or hazardous substances in the soil, surface water, or groundwater at this site. Aspect Consulting does not practice or consult in the field of safety engineering. We do not direct the contractor's operations, and cannot be responsible for the safety of personnel other than our own on the site. As such, the safety of others is the responsibility of the contractor. The contractor should notify the owner if he/she considers any of the recommended actions presented herein unsafe. Closure We appreciate the opportunity to provide geotechnical engineering support services to CHS Engineers and King County Water District 20. If you have any questions about this report, or if we may provide additional services, please contact the undersigned at 206.812.4743. Sincerely, Aspect consulting, LLC Erik 0. Andersen, P.E., P.Eng. Senior Associate Geotechnical Engineer eandersen@aspectconsulting.com Attachments: Figure 1 — Vicinity Map Figure 2 — Site and Exploration Plan W:\_GEOTECH\140184 Water District 20\Deliverables\Revised Geotechnical Letter Report\Revised Geotechnical Letter Report.docx Page 5 5 F licher s K'SnSI S 96 SI. < 9 S 7441 51 S 100th St s'toi *St S Bona St s`. Stwlhs $ id3rd 51 COOP« S ViUor5% GI+, A,. ., GHAnd Cour CLC (:41Ahd Cauchy CWC 0 ur,, M: %6. 0 2,000 Feet 4,000 Vicinity Map South 125th Street Easement Water Main Replacement King County Water District 20 Burien and Tukwila, Washington \Aspect CONSULTING JUN -2014 BY: EA/SCC PROJECT NO. 140184 REV BY Basemap Layer Credits 11 Sources Esri, Delorme, NAVTEQ, TomTom, Intermap, iPC, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), and the GIS User Community FIGURE NO. 1 NANO ea A PORTION OF SECTION 9, TOWNSHIP 23 NORTH, RANGE 4 EAST, W.M., KING COUNTY, WASHINGTON NOT: MAINTAIN DRAINAGE SWALE ROM AT ALL TIMES O4NIN0 CONSTRUCTION. INSTALL 1046. CULVERT ACROSS 140401 � tY LLO 5 02 71E � F�.^ """AND 56' INSTALL STD. 2' AIR -VAC ASSEMBLY AT 9101 POINT CE MAIN ee' Lk et at TOP OF BANK NE ORAINATE SMILE TOP 06 8860 811 Nn8Mrr.MoW. Ci0e1ENRroed. 165 180 166 150 146 140 9082 ALL 4ONT3 CPI IRIS PROECT ARE TO BE RESTRAINED MOS 5' EASEMENT (TIP AT ALL FACILITIES) 2-4. 44' BENDS MIAMI. e Let r ol. 2 -CONCRETE 81.00(1 HH -2 -E�11� ':a M ALICKISNT OF *ATEA RAN 1)00104 THE TREES MAY BE AMMO DURUM CONSTRUCTION TO 44010 REM1VLN0 AS MANY TREES AS POS0IKE. COORDOEAIE FINAL ALIGNMENT 4111 DISTRICT PRIOR TO CLEARING. LOCATE AND REMOVE EMT. 8'.r TEE AND e' OAT VALK. RECONNECT DIST. FIRE HYDRANT. 150101L rnr55" TEE MJANdL 1-6' GAT VALVE RAJ. 0' 01 PIPE 1050TH AS RE04IIED. r L0N0 PATTERN AIM TO CONNECT TO EASING e' Dt. 2042411E BLOCKING. ALL PIPE 401)415 RESTRAINED. 0-r PLUG OR CAP ON EXISTING 4' C1 15 8E ABANDONED. 8'102 enema 8'11 TO BE ABANDONED 26 LP8 r or SNALE CROSSING REMOVE ESIST148 41,41!• TEE 3 684803. INSTALL 1-4',8'41 TEE PL1LM4. 3-e• OAT VALVES ELY4. r OT SPOOL 188'8. T -e1 LONG PATTERN 51001E TO CONNECT TO COSMIC r D1. 2-8' PWG OR CAP ON 0051140 r CI TO 8E ABANDONED. 1 PLAN nevuCE LO5 NG s//s• NA1EA 5188110, SHORT 910E Legend HH -1 Aspect Hand Boring Designation and Approximate Location Reference: Base map by CHS Engineers, LLC. 14 0 542 INSTALL 0110 2' AIR VAC AT 9101 POINT C MAN SC4E IN (CET DEGD( 20 IFA 20 5'-175" 0011281 8END 44211 I 20 IFR r 04 SLOPE 405015. e'-295' VERTICAL BEND RIAA1 e'-It5 \tMT!AL 8IN0 PEARL 40 CL 05ANACE SMALL 5 LFA ' oI MORMON18. 43 8.-140 wanes. e2O NNW 13 LPI r OL 56 r -1,2A• VERTICAL 0 M14A4. INSTALL SNL 2' AIR AND %WA* RELIEF 901.1.E POINT OF MAN. 24 LFA Er 01. SO END PROFILE 1451811 ALL VERTICAL HEPES 151M CONCRETE BLOCKING 0 10 20 30 40 PROFILE 50 80 70 80 90 2! IF8 8'01 Cr LFtLY 01_ 6 rot 0' 0) 1 ILd1AT 0I9T. 8'541 TIM ARu VALYF4 CONNECT 10 YE5IEIILT D' CAT VALVE M1 INSTALL 3-r 21 SPOOLS Le3'2 EAO1. 1- 7 '1 (—) KM—I f:1 -1108710,14.—.L -..t -8 -43' BENDS 04tl8J 1-e• LONE PATTERN REEVE 2 61.60 06 74' 04 a tt' ► r PLUG OR AB ON EXIST. J 4' Cf 10 Be 8840101410. t` APPROVED BY KCMG N0. 20 DATE 40 SWALE DETAIL 185 180 166 150 145 140 Site and Exploration Pian South 125th Street Easement Water Main Replacement King County Water District 20 Burien and Tukwila, Washington yTect JUN -2014 (4156 140184 ECC REVS( er FIGURE NO 2 CHS ENGINEERS, LLC July 15, 2014 City of Tukwila Permit Center Attention: Minnie Dhaliwal, Planning Dave McPherson, Public Works 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 RECEIVED JUL 15 2014 I�E FMLN i RE: King County Water District No. 20 — South 12r Street Easement Water Main Replacement Type C Public Works and Tree Removal and Landscape Modification Permit Applications Dear Minnie, Dave: On behalf of King County Water District No. 20 we are hereby submitting for Type C Public Works and Tree Removal and Landscape Modification Permits for the subject project. In brief summary, the proposed project consists of replacement of an aging 8 -inch cast iron water main and service laterals along 125`h Street (private) east of Military Road South to Tukwila International Boulevard. The water main will be replaced with restrained joint ductile iron pipe. The project traverses private property within the Cities of Burien and Tukwila except for a portion within the unimproved right-of-way of Tukwila International Boulevard. Approximately 500 feet of water main replacement is proposed along a vegetated steep slope on private property within the City of Tukwila. Tree removal is proposed along the project alignment to facilitate installation of the replacement main and future maintenance. The slope is mapped by the City of Tukwila as a moderate to high landslide hazard area; therefore, a geotechnical report has been prepared and is included with this application package. The geotechnical report recommends that excavation along the steep slope occur during dry months to minimize risks associated with moisture sensitive native soils. We respectfully request these permit applications be expedited such that permit issuance will allow for construction this summer/early fall prior to the wet season. In addition, we request an exception to the tree replacement requirement be granted under TMC 18.54.140. Replacement of trees along the water main alignment will conflict with future maintenance and access to water district facilities. Planned restoration and permanent erosion control consists of hydroseeding along the steep slope. Regarding access to private property, the property owner (International Gateway West, i.e., Sabey Corporation) has been informed of the proposed project. Sabey is currently reviewing the preliminary project documents and right -of -entry and hold harmless agreements. Right -of -entry and hold harmless agreements are anticipated to facilitate construction and City access. Also, a revised easement for the replacement main will be executed upon completion of construction. The project is planned for public bid upon permit issuance. Documentation of the selected contractor's insurance and bond will be provided to the City upon receipt. Likewise, if required, the contractor's traffic control plan for work adjacent to Tukwila International Boulevard will be provided to the City. In addition 12507 BEL -RED ROAD SUITE 101 BELLEVUE, WA 98005-2500 TEL (425) 637-3693 FAX (425) 637-3694 KCWD 20 — Permit Application July 15, 2014 Page 2 to the contractor -provided surety, the District, as a franchise utility within the City of Tukwila, provides for maintenance of their facilities as required by the current franchise agreement. Please let me know of any questions or if additional materials are required. We look forward to working with the City to ensure a successful project. Again, your expeditious permit review and issuance is appreciated. The District strongly desires to complete this project this summer or early fall prior to the onset of wet eather. Since CH %n ' neers, LLC c: er, P.E. oject Manager Enclosures: Dick Swaab, General Manager, King County Water District No. 20 Sarah Marques, Senior Property Manager, Sabey Corporation Type C Public Works Permit: Application Fee Estimate Worksheet Engineer's Construction Cost Estimate 4 full size plan sets 1 half size plan set Tree Removal and Landscape Modification Permit: Application and Checklist 4 full size plan sets 1 half size plan set Geotechnical Report Page 2 of 2 CHS ENGINEERS, LLC STATE OF WASHINGTON COUNTY OF ICING CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard,, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX: (206) 431-3665 E-mail: pl n niue'a,7irkwilall A.gav AFFIDAVIT OF OWNERSHIP AND HOLD HARMLESS PERMISSION TO ENTER PROPERTY The undersigned being duly swornpand upon oath states as follows: >' of t I . 1 am the current ownehe property which is the subject of this application. 2. All statements contained in the applications have been prepared by me or my agents and are true and correct to the best of my knowledge. 3. The application is being submitted with my knowledge and consent. 4. Owner grants the City, its employees, agents, engineers, contractors or other representatives the right to enter upon Owner's real property, located at 12-30 t TO kw t l ci f i 6ivGQ t -Tv X1.1 t for the purpose of application review, for the limited time necessary to complete that purpose. 5. Owner agrees to hold the City harmless for any loss or damage to persons or property occurring on the private property during the City's entry upon the property, unless the loss or damage is the result of the sole negligence of the City. 6. Non -responsiveness to a City information request for ninety (90) or more days, shall be cause to cancel the application(s) without refund of fees. EXECUTED at 'Tu KW' (G` (city), W l (state), on _,4 -if - , 20 14 IF./‘) -s7'<c , >g_ ' e!= --P__ i '/vim (Print Name) // i- f1Zr=l 7i."4t -/ 2/✓ (Address) 204x— � % _-"«1130 (Phone Numb (Signature) On this day personally appeared before me`' - executed the foregoing instrument and acknowledged tha Se he signed the same a purposes mentioned therein. SUBSCRIBED At9SWOTO-EEFORE ME ON THIS (�r I 6s3 to me known to be the individual who her voluntary act and deed for the uses and y DAY OF .1\ -- : ARY PUBLIC in and for residing at &.20Ltk--ic My Commission expires on etc Card the State of Washington wv ,2o For landscape plan modifications, tree replacement location or species to be planted may take into account space limitations, interference with above or below ground utilities, and existing tree species nearby. COMPLETE APPLICATION CHECKLIST The materials listed below must be submitted with your application unless specifically waived in writing by the Public Works Department and the Department of Community Development. Please contact each Department if you feel that certain items are not applicable to your project and should be waived. Application review will not begin until it is determined to be complete. ADDITIONAL MATERIALS MAY BE REQUIRED. The initial application materials allow project review to begin and vest the applicant's rights. However, the City may require additional information as needed to establish consistency with development standards. City Staff are available to answer questions about application materials at 206-431-3670 (Department of Community Development) and 206-433-0179 (Department of Public Works). * Please note that the application fee listed in the land use fee schedule covers up to a specified number of review hours and is due at the time an application is received by the City. Review hours over the retainer fee will be charged at $92.00 per hour and the applicant will receive a monthly bill when those fees become due. Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning APPLICATION MATERIALS: ✓ 1. Application Checklist one (1) copy, indicating items submitted with application. 2. Permit Fee: See Land tse I ee Schedule for standard application fee. *Additional fees may be incurred. ✓ 3. Completed Application Form and drawings (4 copies). Rkd t e_ 4. Completed and notarized Affidavit of Ownership and Hold Harmless Permission to Enter Property (1 copy attached). —r 4zoJ,00.4 ; WA pyivi Pc 4,,., t ter' 1 5. One set of all plans reduced to either 8 1/2" x 11" or 11" x 17". N / 6. Written response to the approval criteria at TMC 18.54.130. 1 7. Written response to the exception criteria at TMC 18.54.140 if any exceptions are requested. r,,,11 Q,, 8. Professional review of the replacement plan by a landscape architect, certified arborist, or a biologist ' ✓ 9. Proposed time schedule of vegetation removal, relocation and/or replacement, and other construction activities which may affect vegetation in sensitive areas, sensitive area buffers or in landscaped areas where a landscape plan was required and approved when the project was constructed.. SITE PLAN: ✓ 10. (a) The site plan must include a graphic scale, north arrow and project name. Maximum size 24" x 36". 1 (b) Existing and proposed building footprints and utilities. ✓ (c) Limits of construction. 1 (d) Parking lots, driveways and fire access lanes. ✓ (e) Fences, rockeries and retaining walls. 1 (f) Existing and proposed topography at 2 -foot contour intervals. ✓ (g) Location of all sensitive areas (e.g. streams, wetlands, slopes over 15%, and their buffers and setbacks). ✓ (h) Diameter, species name, location and canopy of existing significant trees. 1 (i) Identification of all significant trees to be removed and/or relocated. Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning PROPOSED TREE REPLACEMENT PLAN: Ni i1,\biologist;. 11. (a) Landscape planting plan by a Washington State licensed landscape architect, certified arborist, or Maximum size 24" x 36". r" I k (b) Diameter, species name, spacing, size and location of replacement trees/vegetation to be used to replace trees that are to be removed. NIP (c) Proposed tree relocation plan (methods, protection of tree during process) N1 Ps. (d) Proposed tree maintenance plan (watering, weeding, mulching, etc.). 3 For single family property owners, this requirement may be waived if they agree to work with City staff to develop a plan. CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX (206) 431-3665 E-mail: plannito. 1i,kwila6r'.1.,rn TREE REMOVAL AND LANDSCAPE MODIFICATION PERMIT APPLICATION FOR STAFF USE ONL Y Planner: File Number: LI -- 001-t (Q Application Complete Date: Project File Number: '// /,.I./. � Application Incomplete Date: Other File Numbers: NAME OF PROJECT/DEVELOPMENT: King County Water District No. 20, South 125th St. Easement Water Main Replacement LOCATION OF PROJECT/DEVELOPMENT: Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. 12301-P . c S 98168, Tukwila WA, 98168 Vu\ w, (ok vx aLL,A `-W1 'of LIST ALL TAX LOT NUMBERS (this information may be, found on your tax statement). 092304-936708 RECEIVED DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the owner/applicant in meetings with City staff, • has full responsibility for identifying and satisfying all relevant and sometimes overlapping development standards, and • is the primary contact with the City to whom all notices and reports will be sent. Cl MMUNI 1 Y DEVELOPMENT Name: Eli Zehner, P.E., CHS Engineers, LLC Address: 12507 Bel -Red Road, Suite 101, Bellevue WA, 98005 Phone: (425) 637-3693 E-mail: eliz Signature: FAX: (425) 637-3694 Date: 1 t5 4-- 111402 - S 125TH ST 0 KING COUNTY WATER DISTRICT NO. 20 2014 Capital Improvement Project SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT GENERAL MANAGER Dick Swaab OFFICE MANAGER Lisa Gee FIELD SUPERINTENDENT Chris Cordi 20 CHS CHS ENGINEERS, LLC 12507 BEL -RED ROAD SUITE 101 BELLEVUE, WA 98005-2500 TEL 425-837-3893 FAX425-837-3694 COMMISSIONERS Russ Pritchard Gary G. Coy Darold DoeII L /V -e4<4 APPROVED BY KCWD NO. 20 DATE RECEIVED JUL 15 2094 cc)I;.i ;h rll f)FVI O 1Mt N[ SHEET 1 OF 6 C(10% DEMI I/"Tinnl CCT GENERAL NOTES 1. ALL CONSTRUCTION AND MATERIALS SHALL CONFORM TO THE REQUIREMENTS SPECIFIED IN THE SPECIFICATIONS. PROPOSAL AND CONTRACT DOCUMENTS FOR THIS PROJECT. THE SPECIFICATIONS INCLUDE ALL APPLICABLE STANDARD DETAILS FOR PAVEMENT RESTORATION AND WATER SYSTEM FACILITIES. 2. ALL WORK WITHIN ROAD RIGHT-OF-WAY SHALL BE IN ACCORDANCE WITH KING COUNTY. CITY OF BURIEN AND CITY OF TUKWILA DESIGN STANDARDS AND SPECIFICATIONS. SEE SHEET 4 FOR TUKWILA CONSTRUCTION NOTES. 3. EXISTING UTILITIES SHOWN ARE APPROXIMATE ONLY AND IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO VERIFY THE CORRECT LOCATIONS BEFORE DIGGING. THIS MAY BE DONE BY CALLING 1-800-424-5555 FOR THOSE UTILITIES PARTICIPATING IN ONE CALL AND BY DIRECT CONTACT OF ALL OTHER AFFECTED UTILITY COMPANIES OR MUNICIPALITIES. 4. CONTRACTOR SHALL GIVE KING COUNTY WATER DISTRICT NO. 20 A MINIMUM OF 72 HOURS NOTICE PRIOR TO CONNECTING TO THE EXISTING SYSTEM. 5. CONSTRUCTION SHALL NOT BEGIN WITHOUT WRITTEN APPROVAL FROM KING COUNTY WATER DISTRICT NO. 20. 6. DUCTILE IRON PIPE SHALL BE NEW, STANDARD THICKNESS CLASS 52, CEMENT -LINED, PUSH -ON JOINTED PIPE CONFORMING TO AWWA C104 AND C151, UNLESS OTHERWISE NOTED. ALL JOINTS SHALL BE RESTRAINED. 7. ALL VALVES, 10 INCHES IN SIZE OR LESS SHALL BE 'RESILIENT SEAT" GATE VALVES IN ACCORDANCE WITH THE DETAIL SPECIFICATIONS, UNLESS OTHERWISE NOTED. ALL VALVES 12 INCHES IN SIZE OR GREATER SHALL BE BUTTERFLY VALVES IN ACCORDANCE WITH THE DETAIL SPECIFICATIONS, UNLESS OTHERWISE NOTED. 8. ALL BENDS SHALL HAVE RESTRAINED JOINTS (MEGALUG OR APPROVED EQUAL) AND CONCRETE THRUST BLOCKING. 9. THE CONTRACTOR SHALL NOT OPERATE ANY VALVES OR MAKE ANY CONNECTIONS TO THE EXISTING WATER MAIN WITHOUT PRIOR APPROVAL FROM THE DISTRICT. 10. ALL PAVEMENT CUTS SHALL BE SAW CUT TO A NEAT LINE. ALL PAVEMENT EDGES SHALL BE CUT AND TRIMMED SQUARE PRIOR TO FINAL ASPHALT PAVEMENT RESTORATION. ALL PAVEMENT EDGES SHALL BE SEALED WITH AN APPROVED SEALANT AFTER FINAL PERMANENT ASPHALT PATCH IS PLACED. SEE KING COUNTY. CITY OF BURIEN AND CITY OF TUKWILA ROAD STANDARDS FOR DETAILS. 11. IF NECESSARY AND WHENEVER POSSIBLE, THE CONTRACTOR. IN LIEU OF USING BENDS, SHALL DEFLECT PIPE AT PIPE JOINTS, PER THE MANUFACTURER'S RECOMMENDATIONS IN ORDER TO MAINTAIN SPECIFIED PIPE ALIGNMENT. CONTRACTOR SHALL NOT EXCEED DEFLECTION LIMIT AS SPECIFIED BY THE MANUFACTURER'S RECOMMENDATIONS. IF NOT POSSIBLE, OR AS DIRECTED, THE CONTRACTOR SHALL INSTALL DUCTILE IRON BENDS. 12. ALL EXISTING MAINS SHALL BE KEPT IN SERVICE AT ALL TIMES DURING CONSTRUCTION UNTIL SUCH TIME THAT THE REPLACEMENT MAIN HAS BEEN TESTED. APPROVED BY THE DISTRICT AND READY FOR PLACEMENT INTO SERVICE. 13. CONTRACTOR IS RESPONSIBLE FOR ENSURING EXISTING SERVICES REMAIN IN SERVICE AT ALL TIMES THROUGHOUT CONSTRUCTION. 14. EXISTING HYDRANTS BEING SALVAGED SHALL BE REMOVED AND CAPPED AT THE MAIN. 15. A TEMPORARY BLOWOFF SHALL BE ESTABLISHED TO FLUSH, PRESSURE TEST, AND PURITY TEST PRIOR TO CONNECTING THE EXISTING SYSTEM TO THE NEW SYSTEM. 16. IF NECESSARY. OR AS REQUIRED IN ORDER TO INSTALL THE NEW WATER MAIN, THE CONTRACTOR SHALL REMOVE AND REPLACE ALL EXISTING UTILITIES TO THE SATISFACTION OF THE OWNER OF SUCH UTILITY. 17. CAUTION -- EXTREME HAZARD -- OVERHEAD ELECTRICAL SERVICE LINES ARE GENERALLY NOT SHOWN ON THE DRAWINGS. ELECTRICAL LINES SHOWN ON THE DRAWINGS ARE LOCATED BY POINT-TO-POINT, POWER -POLE -TO -POWER -POLE CONNECTION. THE CONTRACTOR IS RESPONSIBLE FOR DETERMINING THE EXTENT OF ANY HAZARD CREATED BY OVERHEAD ELECTRICAL POWER IN ALL AREAS AND SHALL FOLLOW PROCEDURES DURING CONSTRUCTION AS REQUIRED BY LAW AND REGULATION. PRIOR TO CONSTRUCTION, THE CONTRACTOR SHALL MEET WITH UTILITY OWNERS AND DETERMINE THE EXTENT OF HAZARD AND REMEDIAL MEASURES AND SHALL TAKE WHATEVER PRECAUTIONS MAY BE REQUIRED. SEE SECTION 02760 OF SPECIFICATIONS. 18. WITHIN PAVED AREAS DEPTH OF COVER ABOVE WATER MAIN SHALL BE 3' MINIMUM AND TRENCH BACKFILL SHALL CONSIST OF 100% IMPORTED CRUSHED ROCK. WITHIN LANDSCAPED AND FORESTED AREAS DEPTH OF COVER ABOVE WATER MAIN SHALL BE 2' MINIMUM AND TRENCH BACKFILL SHALL CONSIST OF APPROVED NATIVE SOILS. CAUTION: NATIVE SOILS ARE MOISTURE SENSITIVE; REFER TO SPECIFICATIONS. 19. SEE SHEETS 4, 5 AND 6 FOR TEMPORARY EROSION AND SEDIMENT CONTROL REQUIREMENTS. SURVEYOR NOTES SURVEY PERFORMED BY CHS ENGINEERS. LLC APRIL 2014. VERTICAL DATUM: NAVD88 PER GPS SURVEY INSTRUMENTATION: THIS SURVEY WAS MADE BY FIELD TRAVERSE METHODS WITH A 6 -SECOND TOPCON THEODOUTE AND COINCIDENT EDM, MAINTAINED IN ACCORDANCE WITH WAC 332-130-100. THE LEVEL OF MEASUREMENT PRECISION MEETS OR EXCEEDS THE REQUIREMENTS OF WAC 332-130-090. CONSTRUCTION SEQUENCE NOTES 1. FLAG CLEARING LIMITS PER PLANS. 2. INSTALL TESC MEASURES PER PLAN AND AS OTHERWISE NECESSARY TO SUIT LOCAL CONDITIONS. (IN PAVED AREAS. TEMPORARILY DEPLOY STRAW WATTLES AND SANDBAGS IN IMMEDIATE AREA OF TRENCH WORK. SWEEP PAVED AREA PRIOR TO MOVING WATTLES WITH ADVANCING WORK ZONE.) 3. CONTACT CITY OF TUKWILA FOR INSPECTION. 4. COMPLETE WATER MAIN INSTALLATION INCLUDING EXCAVATION, PIPE INSTALLATION, BACKFILL, COMPACTION, TESTING, FLUSHING AND SURFACE RESTORATION. 5. COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON WITH STRAW MULCH OR PLASTIC SHEETING. 6. STABILIZE ALL DISTURBED LAND SURFACES. 7. REMOVE REMAINING TESC FACILITIES. kibmiw. .r.below. Cellbeforeyordly S 106TH ST 0 S 112TH 0 S 112TH ST a 5 116TH ST S 117TH 5 117TH a 1 S 126TH ST 120TH STI SII124TH ST 5 120TH ST PROJECT LOCATION O IINN 125TH S. 125TH CT. 5. 128TH ST. S 130THI'TT JL -J r5 132ND 5 S 134TH 5d, 51h34TH 5 F BU N S 136TH ST II r 4 5 133RD ST I1�1ilATAC nI Innn -- PROJECT LOCATION - VICINITY MAP SCALE: 1"=1000' 7 EXISTING FHS N 6"CI W OR SS SS=3' 00 P� 5 f1I -O_00 0 -- MB. RECEIVED JUL 15 2014 { i i I U11\41'1,11 LEGEND PROPOSED X -)o( )0(- SHEET INDEX DESCRIPTION FIRE HYDRANT GATE VALVE TEE BEND FLANGE FITTING MECHANICAL JOINT FITTING SLEEVE THRUST BLOCKING WATER MAIN (LENGTH. SIZE. TYPE) WATER SERVICE WITH METER BOX WATER SERVICE WITH RELOCATED METER BOX SANITARY SEWER MANHOLE SANITARY SEWER CLEANOUT SANITARY SEWER MAIN SANITARY SEWER DEPTH CATCH BASIN AND STORM PIPE DRAINAGE SWALE POWER POLE GUY POWER/COMMUNICATION VAULT SIGN GAS GAS VALVE STORM DRAINAGE LINE EDGE OF ASPHALT CHAIN LINK FENCE WOOD FENCE MAILBOX BUSHES DECIDUOUS TREE, DIAMETER (ALDER UNLESS NOTED) CONIFEROUS TREE, DIAMLILK ROCKERY CATCH BASIN TREE REMOVAL TESC FENCING & CLEARING LIMITS CB PROTECTION STRAW WATTLE LOW PERMEABILITY TRENCH CHECK DAM 1 COVER 2 INDEX, GENERAL NOTES, LEGEND & VICINITY MAP 3 PLAN 4 TUKWILA NOTES & TESC NOTES 5 TESC, TREE REMOVAL AND RESTORATION PLAN 6 SEDIMENT CONTROL NOTES AND DETAILS L/ 11/ aoVt APPROVED BY: KCWD NO. 20 DATE 0 0 r SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT INDEX, GENERAL NOTES, LEGEND & VICINITY MAP Sheet 2 Of 6 Job No. 111402 J dni r•r r• 1 1i+ra n w 1 r.. --r NAVD 88 FUTURE SS & MH BOULEVARD LANDING DE EXIST. 8' CI TO BE ABANDONED SS REPLACE EXIST i' WATER SERVICE, SHORT SIDE j 8 wCI S. 125TH ST. (PRIVATE) 5 PARCEL 092304 TRCT 1- CO NEXT MAIN LINE VALVE APPROX 350' NORM OF S. 1257H ST. INSTALL 2-8' 45' BENDS MJxMJ. 1-8' DI SPOOL L -3't. 8' DI 2 -CONCRETE BLOCKING. 1-8" LONG PATTERN SLEEVE TO CONNECT TO EXIST. 8' CI. 1-8" PLUG OR CAP ON EXIST. 8' CI BEING ABANDONED. INSTALL 8'x8'x8' TEE FLxFLxFL 3-8" GAZE VALVES FLxMJ. CONCRETE BLOCKING. A PORTION OF SECTION 9, TOWNSHIP 23 NORTH, RANGE 4 EAST, W.M., KING COUNTY, WASHINGTON PARCEL 092304949 15' EASEMENT (TYP AT ALL WATER FACILITIES) REPLACE AND RECONNECT EXIST. 11¢' WATER SERVICE. INCLUDING be ILK PER STD. OIL W-13, EXCEPT INSTALL SIGMA TAPPED TEE DTT8x2" TAP (MJ) OR APPROVED EQUAL DISTRICT WILL PROVIDE METER BOXES. PRIVATE SERVICE LOCATION UNKNOWN. FINAL METER LOCATION PER DISTRICT, OUTSIDE OF PARKING STALL, TYP 3 PLACES. INSTALL 8'x8'x6' TEE MJxMJxFL STD FIRE HYDRANT ASSEMBLY 6' DI L=12'1. CONCRETE BLOCKING. PARCEL 0923049034 RELOCATE EXIST. WM TO NORTH OF REPLACEMENT MAIN, TYP 8 bco �t •8" IRE EXIST. 8' CI TO AND BUSHES BE ABANDONED - 1-8'x8'x6' TEE FLxFLxFL 2-8' GATE VALVES FLxMJ. 1-8' 11)! BEND FLxFL 1 -STD. FIRE HYDRANT ASSEMBLY 6' DI PIPE L=6't. 2 -CONCRETE BLOCKING. PARCEL 0923049462 POTHOLE SS. DEFLECT W UNDER IF SS DEPTH 3' OR LESS. SLEEVE CROSSING IF VERT CLEARANCE 18' OR LESS, TYP. SLEEVE SHALL BE CONTINUOUS OR HAVE PRESSURE RATED JOINTS AND EXTEND 10' BEYOND CROSSING EACH NAY. NOTE SEE SHEET 5 FOR TREE PROTECTION AND TRENCH CHECK DAM REQUIREMENTS. 1-8'x8'x6' TEE MJxMJxFL 1 -STD. FIRE HYDRANT ASSEMBLY. 8' DI L -4't 1 CONCRETE BLOCKING PARCEL 0923049034 MAINTAIN MIN HORIZ CLEARANCES. 3' TO EXIST. CI W. 5' TO EXIST. HDPE SS SSMH #7026 RIM = 298.02' (ABANDONED) SEE ABOVE w z J 2 U 1- Q 2 PARCEL 0923049036 PARCEL 0923049035 8 LF± 8' DI SSMH #7025 RIM = 299.78' IE 8" PVC = 293.38' (CENTER CHANNEL) LOCATE EXISTING TEE. REMOVE NORTH AND EAST VALVES. INSTALL 8' BLIND FL (NORTH). INSTALL 8' ADAPT FLxMJ (EAST). TO CONNECT TO EXIST. TEE FL INSTALL 8' PLUG OR CAP ON 8' CI BEING ABANDONED. POTHOLE SS DEFLECT W UNDER IF SS DEPTH 3' OR LESS. SLEEVE CROSSING IF VERT CLEARANCE 18' OR LESS, TYP. SLEEVE SHALL BE CONTINUOUS OR HAVE PRESSURE RATED JOINTS AND EXTEND 10' BEYOND CROSSING EACH WAY., REMOVE EXIST. VALVE. TEE AND 11Yi BEND. INSTALL 8' 90' BEND MJxMJ. 8' DI SPOOL 4 LFt 8' LONG PATTERN SLEEVE TO CONNECT TO EXIST. 8' DI. CONCRETE BLOCKING. 8' PLUG OR CAP ON EXIST. 8' CI TO BE ABANDONED. NEXT MAINLINE VALVE APPROX. 500' SOUTH OF S. 125Th ST PARCEL 0923049036 8 ROCK LINED DITCH FH TO WM APPROXIMATE EXTENT OF CITY OF TUKWILA SENSITIVE STEEP SLOPE (15%±) TICAL BENDS 15' EASEMENT (TYP AT ALL WATER FACILITIES) it L]iL J PARCEL 0923049367 30 r`- " -18" SALVAGE EXIST. FH REMOVE EXIST. 8'x8'x8' TEE AND 8' VALVE. INSTALL 1-8'x8'x8' TEE FLxF.xFL 3-8" GATE VALVES FLxMJ. CONCRETE BLOCKING. 17 LFt 8" 01 8' LONG PATTERN SLEEVE TO CONNECT TO EXIST. 8" DI. 2-8' PLUG OR CAPS ON EXIST. 8' CI TO BE ABANDONED. NEXT MAINLINE VALVE APPROX 250' SOUTH OF S. 125111 ST REMOVE EXIST. 8'x8'x8' TEE AND 3 VALVES. INSTALL: 1-B'x8'x8' TEE FL.xFLxFL 3-8' GATE VALVES FLxMJ. 2-8" DI SPOOLS L=3'-6' EA. 1-8' 45' BEND MJxPE 1-8' 45' BEND MJxMJ 1-8' LONG PATTERN SLEEVE TO CONNECT TO EXIST. 8' DI. 2-8' PLUG OR CAP ON EXIST. 8' CI TO BE ABANDONED. SSMH RIM = 264.69' IE 8"HDPE= 259.09' 1-8'GATE VALVE MJxMJ. r ;r e I )mIFj Iim(� J f90 4ino��}�- DR1VE'JJj4Y & L1. FIRE ACCESS `ld fxwo ,LANEA 6.7tet•Val, islit we ow ik AWN& _ REMOVE EXIST. 8'x6" TEE AND 8' AND 6" GATE VALVES. RECONNECT EXIST FIRE HYDRANT. INSTALL 8'x8'xt' TEE MJxMJxFL 1-6' GATE VALVE FLxMJ. 6" DI PIPE LENGTH AS REQUIRED. 8' LONG PATTERN SLEEVE TO CONNECT TO EXIST. 6" DI. CONCRETE BLOCKING. 2-8' PLUG OR CAP ON EXIST. 8' CI TO BE ABANDONED. MAINTAIN MIN HORIZ CLEARANCES. 3' TO EXIST. CI W. 5' TO E),1IST. HDPE SS (15%f) REMOVE EXIST. VALVE BOX AND BACKFILL VOID, TYP 3 PLACES 2-8' 45' BENDS MJxMJ. 10LFt 8" DI. 2 -CONCRETE ,BLOCKING PARCEL -a SSMH RIM = 210.50' IE 8"HDPE = 204.10' 0923049036 K6ovu atsbelOW. Cailbdonrou ag, PROX TOP OF BANK EXIST. 8' CI TO BE ABANDONED PLAN x', • 060" MAPL EXIST. B' CI TO 1 ! BE ABANDONED VICE, SHORT SIDE/TYP -4 A Z 7 8" DI SS 11 x x 18' LF± 8' DI CE EXIST. 3/4' WATER 1 N� PARCEL ' PARCEL1 e 0923049116 0923049394 ] - iii_):DI I(i( 8_DI R CEN r'' ' :' 1 'gs L152 4 ----J Litii-00414 20 10 0 20 40 SCALE 111 FEET ('OMmo14,' DEVELUNML / 1 SSMH RIM = 110.94' / \ IE 8"HDPE= 104.23' LOCATE EXIST. 8"x8"x8" TEE AND VALVES. CONNECT TO 8' GATE VALVE MJ. INSTALL 2-8" DI SPOOLS L -3't EA. `1-8' 45' BEND MJA1J. 1-8' 45' BEND MJxPE 1-8' LONG PATTERN SLEEVE 2 -CONCRETE BLOCKING. 8' PLUG OR CAP ON EXIST. 8' CI TO BE ABANDONED. 0 J w w w OD w z J nc0 H Q APPROVED BY KCWD NO. 20 DATE 0 U m 0 0 z 1 414 Txi ma o on U W o j on a rn y, oa Orr 3 0 m KING COUNTY WATER DISTRICT NO. 20 SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT z Q J 0 Sheet 3 Of 6 Job No. 111402 i Sflo/ RGnI IcTIrmI CI=A CITY OF TUKWILA STANDARD CONSTRUCTION NOTES PRIOR TO STARTING CONSTRUCTION, CONTACT ONE -CALL (1-800-424-5555) , OR 811, FOR UTILITY LOCATIONS. CONTACTS PROJECT MANAGER: RODNEY LANGER 425-637-3693 DESIGN ENGINEER: ELI ZEHNER 425-637-3693 OWNER: KING COUNTY WATER DISTRICT NO. 20 DICK SWABB 206-243-3990 GENERAL 1. LOCATIONS SHOWN FOR EXISTING UTILITIES ARE APPROXIMATE. 2. AT LEAST 48 HOURS BEFORE STARTING PROJECT SITE WORK, NOTIFY THE UTILITIES INSPECTOR AT 206-433-0179. 3. REQUEST A PUBLIC WORKS UTILITY INSPECTION AT LEAST 24 HOURS IN ADVANCE BY CALLING 206-433-0179. 4. THE CONTRACTOR ASSUMES SOLE RESPONSIBILITY FOR WORKER SAFETY, AND DAMAGE TO STRUCTURES AND IMPROVEMENTS RESULTING FROM CONSTRUCTION OPERATIONS. 5. THE CONTRACTOR SHALL HAVE THE PERMITS) AND CONDITIONS, THE APPROVED PLANS, AND A CURRENT COPY OF CITY OF TUKWILA DEVELOPMENT GUIDELINES AND DESIGN AND CONSTRUCTION STANDARDS AVAILABLE AT THE JOB SITE. 6. ALL WORK SHALL CONFORM TO THESE APPROVED DRAWINGS. ANY CHANGES FROM THE APPROVED PLANS REQUIRE PRE -APPROVAL FROM THE OWNER, THE ENGINEER, AND THE CITY OF TUKWILA. 7. ALL METHODS AND MATERIALS SHALL MEET CITY OF TUKWILA DEVELOPMENT GUIDELINES AND DESIGN AND CONSTRUCTION STANDARDS, UNLESS OTHERWISE APPROVED BY THE PUBLIC WORKS DIRECTOR. 8. CONTRACTOR SHALL MAINTAIN A CURRENT SET OF RECORD DRAWINGS ON-SITE. 9. CONTRACTOR SHALL PROVIDE RECORD DRAWINGS PRIOR TO PROJECT FINAL APPROVAL 10. REPLACE OR RELOCATE ALL SIGNS DAMAGED OR REMOVED DUE TO CONSTRUCTION. 11. RETAIN, REPLACE OR RESTORE EXISTING VEGETATION IN RIGHTS-OF-WAY, EASEMENTS, AND ACCESS TRACTS. CONSTRUCTION 1. ALL WORK PERFORMED SHALL BE PER APPROVED PLANS AND SPECIFICATIONS ONLY. THE PERMITTEE IS REQUIRED TO MAINTAIN A SET OF APPROVED PLANS, SPECIFICATIONS, AND ASSOCIATED PERMITS ON THE JOB SITE. WORK SHALL BE PERFORMED IN ACCORDANCE WITH ALL FEDERAL STATE, AND LOCAL LAWS. PERMITTEE SHALL APPLY FOR A REVISION FOR ANY WORK NOT ACCORDING TO THE APPROVED PLANS. 2. PERMITTEE/CONTRACTOR SHALL ARRANGE A PRECONSTRUCTION CONFERENCE WITH THE CITY'S INSPECTOR PRIOR TO BEGINNING ANY WORK. 3. WORK IN ROADWAYS A. ALL WORK IN ROADWAYS SHALL MEET TMC 11 AND THE FOLLOWING: B. PRIOR TO ANY ACTIVITY IN CITY RIGHT-OF-WAY, THE PERMITTEE SHALL PROVIDE THE CITY A TRAFFIC CONTROL PLAN FOR REVIEW AND APPROVAL THE TRAFFIC CONTROL PLAN SHALL INCLUDE THE LOCATION, ADDRESS AND DESCRIPTION OF TRAFFIC FLOW DURING THE WORK AND SHALL MEET MUTCD REQUIREMENTS. C. ALL WORK REQUIRING LANE CLOSURES MUST BE BY PERMIT ONLY. FROM THE THIRD THURSDAY IN NOVEMBER TO THE FOLLOWING JANUARY 2ND, THE DIRECTOR DOES NOT ALLOW LANE CLOSURES IN THE TUKWILA URBAN CENTER. D. FIRE, PEDESTRIAN, AND VEHICULAR ACCESS TO BUILDINGS SHALL BE MAINTAINED AT ALL TIMES, EXCEPT WHEN PERMITTEE HAS PERMISSION FROM THE BUILDING OWNER AND THE DIRECTOR TO CLOSE AN ACCESS. E. ALL ROADWAYS SHALL BE KEPT FREE OF DIRT AND DEBRIS USING STREET SWEEPERS. USE OF WATER TRUCKS FOR CLEANING ROADWAYS REQUIRES PREAPPROVAL FROM THE DIRECTOR. F. INSTALL STEEL PLATES OVER ANY TRENCH, AT ANY TIME WORK IS STOPPED AND THE TRENCH IS LEFT OPEN. UTILITY NOTES 1. ALL TRENCH EXCAVATION OPERATIONS SHALL MEET OR EXCEED ALL APPLICABLE SHORING LAWS FOR TRENCHES OVER 4 -FEET DEEP. ALL TRENCH SAFETY SYSTEMS SHALL MEET WISHA REQUIREMENTS. 2. POWER, CABLE, FIBER OPTICS, AND TELEPHONE LINES SHALL BE IN A TRENCH WITH A 5' MINIMUM HORIZONTAL SEPARATION FROM OTHER UNDERGROUND UTILITIES. 3. ADJUST ALL MANHOLES, CATCH BASINS, AND VALVES IN PUBLIC RIGHTS-OF-WAY OR EASEMENTS AFTER ASPHALT PAVING. a.o.we.r.betow. Caltb.ror.yoemy. GRADING AND EROSION CONTROL NOTES 1. THE EROSION PREVENTION AND SEDIMENT CONTROL (ESC) MEASURES ON THE APPROVED PLANS ARE MINIMUM REQUIREMENTS. 2. BEFORE BEGINNING ANY CONSTRUCTION ACTIVITIES, ESTABLISH THE CLEARING LIMITS, INSTALL CONSTRUCTION ENTRANCE, AND INSTALL EROSION PREVENTION AND SEDIMENT CONTROL MEASURES. 3. BEFORE ANY GROUND DISTURBANCE OCCURS, ALL DOWNSTREAM EROSION PREVENTION AND SEDIMENT CONTROL MEASURES (ESC) MUST BE CONSTRUCTED AND IN OPERATION. INSTALL AND MAINTAIN ALL ESC MEASURES ACCORDING TO THE ESC PLAN. 4. ESC MEASURES, INCLUDING ALL PERIMETER CONTROLS, SHALL REMAIN IN PLACE UNTIL FINAL SITE CONSTRUCTION IS COMPLETED AND PERMANENT STABILIZATION IS ESTABLISHED. 5. FROM MAY 1 THROUGH SEPTEMBER 30, PROVIDE TEMPORARY AND PERMANENT COVER MEASURES TO PROTECT DISTURBED AREAS THAT WILL REMAIN UNWORKED FOR SEVEN DAYS OR MORE. 6. FROM OCTOBER 1 THROUGH APRIL 30, PROVIDE TEMPORARY AND PERMANENT COVER MEASURES TO PROTECT DISTURBED AREAS THAT WILL REMAIN UNWORKED FOR TWO DAYS OR MORE. IN ADDITION TO COVER MEASURES, THE CONTRACTOR MALL: A. PROTECT STOCKPILES AND STEEP CUT AND FILL SLOPES IF UNWORKED FOR MORE THAN 12 HOURS. B. STOCKPILE, ON SITE, ENOUGH COVER MATERIALS TO COVER ALL DISTURBED AREAS. C. BY OCTOBER 8, SEED ALL AREAS THAT WILL REMAIN UNWORKED DURING THE WET SEASON (OCTOBER 1 THROUGH APRIL 30). MULCH ALL SEEDED AREAS. 7. FAILURE TO MAINTAIN ESC MEASURES IN ACCORDANCE WITH THE APPROVED MAINTENANCE SCHEDULE MAY RESULT IN THE WORK BEING PERFORMED AT THE DIRECTION OF THE DIRECTOR AND ASSESSFD AS A LIEN AGAINST THE PROPERTY WHERE SUCH FACILITIES ARE LOCATED. 8. DURING THE LIFE OF THE PROJECT, THE PERMITTEE SHALL MAINTAIN IN GOOD CONDITION AND PROMPTLY REPAIR, RESTORE, OR REPLACE ALL GRADE SURFACES; WALLS, DRAINS, DAMS, STRUCTURES, VEGETATION, EROSION AND SEDIMENT CONTROL MEASURES, AND OTHER PROTECTIVE DEVICES IN ACCORDANCE WITH APPROVED PLANS. 9. THE PERMITTEE SHALL MONITOR THE DOWNSTREAM DRAINAGE FEATURES, AND SHALL WITH THE DIRECTOR'S APPROVAL REMOVE ALL SEDIMENT DEPOSITION RESULTING FROM PROJECT -RELATED WORK. 10. ALL WORK PERFORMED SHALL BE PER APPROVED PLANS AND SPECIFICATIONS ONLY. THE PERMITTEE IS REQUIRED TO MAINTAIN A SET OF APPROVED PLANS AND SPECIFICATIONS AND ASSOCIATED PERMITS ON THE JOB SITE. WORK SHALL BE PERFORMED IN ACCORDANCE WITH ALL FEDERAL STATE, AND LOCAL LAWS. 11. AS THE FIRST ORDER OF BUSINESS, THE PERMITTEE SHALL INSTALL EROSION PREVENTION AND SEDIMENT CONTROL MEASURES PER THE ESC AND SHALL INSTALL THE DOWNSTREAM TEMPORARY ESC MEASURES BEFORE ANY SITE DISTURBANCE OCCURS. BEFORE THE TEMPORARY MEASURES ARE REMOVED, INSTALL AND ESTABLISH THE UPSTREAM PERMANENT ESC MEASURES. 12. THE PERMITTEE SHALL AT ALL TIMES PROTECT SENSITIVE AREAS, THEIR BUFFERS, AND ADJACENT PRIVATE PROPERTIES AND PUBLIC RIGHTS-OF-WAY OR EASEMENTS FROM DAMAGE DURING GRADING OPERATIONS. THE PERMITTEE SHALL RESTORE, TO THE STANDARDS IN EFFECT AT THE TIME OF THE ISSUANCE OF THE PERMIT, SENSITIVE AREAS, THEIR BUrFLKS, AND PUBLIC AND PRIVATE PROPERTIES AND IMPROVEMENTS DAMAGED BY THE PERMITTEE'S OPERATIONS. 13. PERMITTEE SHALL ARRANGE FOR AND COMPLY WITH THE FOLLOWING: A. NOTIFY THE PUBLIC WORKS DEPARTMENT WITHIN 48 HOURS FOLLOWING INSTALLATION OF ESC MEASURES. B. OBTAIN PERMISSION IN WRITING FROM THE PUBLIC WORKS DEPARTMENT PRIOR TO MODIFYING THE ESC PLAN. C. MAINTAIN ALL ROAD DRAINAGE `:'YSTEMS, STORM WATER DRAINAGE SYSTEMS, CONTROL MEASURES AND OTHER FACILITIES AS IDENTIFIED IN THE ESC PLAN. D. REPAIR ANY SILTATION OR EROSION DAMAGES TO ADJOINING PROPERTIES AND DRAINAGE FACILITIES. E. INSPECT ACCORDING TO THE APPROVED ESC INSPECTION SCHEDULE AND MAKE NEEDED REPAIRS IMMEDIATELY. GEOTECHNICAL NOTE THE ENGINEER, REVIEWED THE GEOTECHNICAL REPORT, TITLED REVISED GEOTECHNICAL LETTER REPORT - PROJECT NO. 140184. PREPARED BY ERIK 0. ANDERSEN, P.E., PROJECT ENGINEER. ASPECT CONSULTING, LLC AND DATED JUNE 19, 2014. I UNDERSTAND THE REPORTS RECOMMENDATIONS. I EXPLAINED TO THE OWNER THE RISKS DUE TO SLIDES AND I INCORPORATED THE RECOMMENDATIONS INTO THE DESIGN. I ESTABLISHED MEASURES TO REDUCE POTENTIAL RISK OF INJURY OR DAMAGE THAT MIGHT BE CAUSED BY ANY EARTH MOVEMENT PREDICTED IN THE REPORT. SIGNATURE DATE TESC NOTES (KING COUNTY SWDM) 2. THE IMPLEMENTATION OF THESE TESC PLANS AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE TESC FACILITIES IS THE RESPONSIBILITY OF THE CONTRACTOR UNTIL ALL CONSTRUCTION IS APPROVED. 3. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE CLEARLY FLAGGED BY SURVEY TAPE OR FENCING, IF REQUIRED, PRIOR TO CONSTRUCTION (SWDM APPENDIX 0). DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE CLEARING LIMITS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE MAINTAINED BY THE CONTRACTOR FOR THE DURATION OF CONSTRUCTION. 4. STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS. MAY BE REQUIRED T ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN AND TRACK OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR THE DURATION OF THE PROJECT. 5. THE TESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING SO AS TO ENSURE THAT THE TRANSPORT OF SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, AND ADJACENT PROPERTIES IS MINIMIZED. 6. THE TESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE TESC FACILITIES SHALL BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G. ADDITIONAL COVER MEASURES, ADDITIONAL SUMP PUMPS, RELOCATION OF DITCHES AND SILT FENCES, PERIMETER PROTECTION ETC.) AS DIRECTED BY THE LOCAL AGENCY. 7. THE TESC FACILITIES SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING. WRITTEN RECORDS SHALL BE KEPT OF WEEKLY REVIEWS OF THE TESC FACILITIES. 8. ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE DISTURBED FOR TWO CONSECUTIVE DAYS DURING THE WET SEASON OR SEVEN DAYS DURING THE DRY SEASON SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED TESC METHODS (E.G., SEEDING, MULCHING. PLASTIC COVERING, ETC.). 9. ANY AREA NEEDING TESC MEASURES THAT DO NOT REQUIRE IMMEDIATE ATTENTION SHALL BE ADDRESSED WITHIN SEVEN (7) DAYS. 10. THE TESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH DURING THE DRY SEASON, BI -MONTHLY DURING THE WET SEASON, OR WITHIN TWENTY FOUR (24) HOURS FOLLOWING A STORM EVENT. 11. AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT -LADEN WATER INTO THE DOWNSTREAM SYSTEM. 13. COVER MEASURES WILL BE APPLIED IN CONFORMANCE WITH APPENDIX D OF THE KING COUNTY SURFACE WATER DESIGN MANUAL. 14. PRIOR TO THE BEGINNING OF THE WET SEASON (OCT. 1), ALL DISTURBED AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON. A SKETCH MAP OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE LOCAL AGENCY. LIti-va6q6 APPROVED BY KCWD NO. 20 DATE c 0° z ' 0 W CHS ENGINEERS, LLC I o3 m OM SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT TUKWILA NOTES, TESC NOTES Sheet 4 O1 6 Job No. 111402 50% REDUCTION SE1 S 125TH ST Deaian.dwa 1 NAVD 88 s TEMPORARILY PLACE e STRAW WATTLES W/ e SANDBAGS IN PAVED CONSTRUCTION AREA DOWN GRADIENT OF TRENCH 1 8w CI S. 125TH ST. (PRIVATE) I ss PARCEL 092304 TRCT w RESTORE LANDSCAPING 9 w A PORTION OF SECTION 9, TOWNSHIP 23 NORTH, RANGE 4 EAST, W.M., KING COUNTY, WASHINGTON I I PARCEL 092304949 O r TEMPORARILY PLACE e f STRAW WATTLES W/ 8 SANDBAGSr IN PAVED CONSTRUCTION AREA DOWN GRADIENT OF TRENCH ro, / 8" TR5E io , ,AND BLSHES W io PARCEL 0923049036 Z J D 1 X APPROXIMATE EXTENT OF CITY OF TUKWILA m I Fg SENSITIVE STEEP SLOPE 15%f <z STRAW o � Q2 ' TYP WATTLES SILT FENCE CcgN *it SSMH #7026 RIM = 298.02" (ABANDONED) PARCEL 0923049035 SSMH #7025 RIM = 299.78' IE 8" PVC = 293.38' (CENTER CHANNEL) PROTECT AND RESTORE SEASONAL DRAINAGE SWALE PERA PARCEL 0923049036 PARCEL 0923049367 3 �TR`Xl�k'I •OBUNp,letV✓ PER GENERAL NOTES, SHEET 1 SSMH RIM = 210.50' IE 8"HDPE = 204.10' PARCEL 0923049036 APPROX. EX. GRADE ALONG PROPOSED PIPE ALIGNMENT 8'-22X2' BEND (MJxMJ) PROX. TOP OF BANK CLEARING LIMIT EX. FENCE TO SOUTH, TYP. DELINEATE WITH ORANGE SURVEY TAPE FULL LENGTH OF PROJECT MAINTAIN SEASONAL DRAINAGE SWALE FLOW AT ALL TIMES DURING CONSTRUCTION. INSTALL TEMPORARY 12" CULVERT ACROSS TRENCH AREA. FOLLOWING REMOVAL, PLACE 101N* QUARRY SPALLS ACROSS DISTURBED TRENCH AREA ALONG FLOW LINE. OW -PERMEABILITY TRENCH CHECK DAMS NATIVE BACKFILL (I) N w SS PARCEL 0923049034 O 0 PROTECT DOWN GRADIENT CB'S (NOT SHOWN) v TEMPORARILY PLACE STRAW WATTLES W/ SANDBAGS IN PAVED CONSTRUCTION AREA DOWN GRADIENT OF TRENCH PARCEL 0923049462 RESTORE CURBING, TYP PLAN SSMH RESTORE ROCK LINED DITCH RIM = 264.69' W/ 4'-8' QUARRY SPALLS. IE 8"HDPE= 259.09' PROTECT INLETS TO ROCK LINED DITCH W/ STRAW WATTLE PER n 20 10 0 I 20 SCALE IN FEET 40 ;LAWN/ - '— �LAWt,� TEMPORARY LJ CONSTRUCTION ENTRANCE IF OFFSITE HAUL INITIATED FROM DISTURBED AREA. /7/ Su x -. LAWN RESTORE DISTURBED AREA WITH SOD FROM CURB TO WATER METER _sS _ X� W PARCEL 0923049034 HYDROSEED AND MULCH W/ STRAW DISTURBED AREA RESTORE PRIVATE IRRIGATION k LANDSCAPING TO MATCH EXISTING, THIS VICINITY (NOT SHOWN) 8^. 2-t81 S� .414441.1%- •, — vim` DRIVEWAY & { «. Xi( v•= .`•'X:(,SO •._ ••• `�� .•••• `.�\I jiz,E•7 FIRE ACCESS .%%i��`•-e\ •' . , ia, �=.• ��cLANE �4.•, j, .– 9a MP �. y . i0C„>�,_ 1 IPPIA.M11114 4 GRADE 2 MIN \ _ _ 7 LOW PERMEABILITY TRENCH CHECK DAM AT 100' 0.C. DOWN STREAM OF DRAINAGE SWALE CAUTION: PROTECT EXIST. LARGE DIAMETER MAPLE TREE AND ROOTS. PROTECT CB PROTECT EXIST PINE TREES DI CONC. BLOCK AT VERT. BEND. TYP LDloa.wrsbelOW. Ceti bet or.roudig. 8'-221¢' BEND 0.46$1.01 t 8'-11Y4 BEND (PExA1J) MAINTAIN SLOPE (IE, NO LOCAL HIGH POINTS) SECTION – SWALE CROSSING NTS NOTES: 1. INSTALL AS SHOWN ON PLANS OR AS DIRECTED. 2. CHECK DAM SHALL CONSIST OF NATIVE BACKFILL MIXED W/ 105 BY WEIGHT DRY CEMENT. MOISTEN PRIOR TO INSTALLATION. (APPROXIMATELY 180 LB CEMENT PER DAM) 0 DETAIL – LOW PERMEABILITY TRENCH CHECK DAM NTS \ TEMPORARY e� CONSTRUCTION ENTRANCE OFFSITE HAUL INITIATED \ _ / FROM DISTURBED AREA. PARCEL 0923049176 PARCEL 0923049394 TREE REMOVAL TABLE DIAMETER QUANTITY SPECIES 4-8 10 ALDER, LOCUST 8-12 7 ALDER 12-18 1 ALDER 18-24 1 ALDER 24+ 3 LOCUST HYDROSEED AND MULCH W/ STRAW DISTURBED AREA SSMH RIM = 110.94' IE 8"HDPE= 104.23' PROTECT EXIST ROCKERY & STREET LIGHT HYDROSEED MIX 5 WEIGHT 5 PURITY 5 GERMINATION DWARF TALL FESCUE (SEVERAL VARIETIES) FESTUCA ARUNDINACEA VAR. 45 98 90 DWARF PERENNIAL RYE (BARCLAY) LOLIUM PERENNE VAR. BARCLAY 30 98 90 RED FESCUE FESTUCA RUBRA 20 98 90 COLONIAL BENTGRASS AGROSTIS TENUIS 5 98 90 r,Govo° Lig oo y6 APPROVED BY KCWD NO. 20 DATE U m 0 0 U W .O .. 1 I � n v 21: W KING COUNTY WATER DISTRICT NO. 20 SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT TESC, TREE REMOVAL & RESTORATION PLAN Sheet 5 Of 6 Job No. 111402 50% REDUCTION SET TESC GENERAL NOTES OVERFLOW BYPASS CRATE GEOTEXTTLE 5" MAX.2. HI r FILTER FABRIC MATERIAL IN FILTER FABRIC SECURED CONTINUOUS ROLLS. USE STAPLES TO 2"x2" 14 GA. WIRE OR WIRE RINGS TO ATTACH FABRIC OR EQUAL FABRIC TO WIRE. Revision J 1. EROSION AND SEDIMENT CONTROL PRACTICES SHALL COMPLY WITH APPENDIX D OF THE KING COUNTY STORMWATER DESIGN MANUAL THE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE REPLACEMENT AND UPGRADE OF THESE ESC FACILITIES IS THE RESPONSIBILITY OF THE CONTRACTOR UNTIL ALL CONSTRUCTION IS COMPLETED AND APPROVED AND ANY VEGETATION/LANDSCAPING ESTABLISHED. 3. THE BOUNDARIES OF THE CLEARING UMITS SHOWN ON THIS PLAN SHALL BE CLEARLY MARKED/FLAGGED IN THE FIELD PRIOR TO CONSTRUCTION. NO DISTURBANCE BEYOND THE FLAGGED CLEARING UMITS SHALL BE PERMITTED. THE FLAGGING SHALL BE MAINTAINED BY THE CONTRACTOR FOR THE DURATION OF CONSTRUCTION. 4. THE ESC FACWTIES AV ON THESE PLANS MUST BE CONSTRUCTED IN SUCH A MANNER AS TO ENSURE THAT SEDIMENT LADEN WATER AND/OR SEDIMENT DO NOT ENTER THE DRAINAGE SYSTEM, ROADWAYS, OR VIOLATE APPLICABLE WATER STANDARDS. 5. THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE FACIUT1ES SHALL BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND TO ENSURE THAT SEDIMENT AND SEDIMENT LADEN WATER DO NOT LEAVE THE SITE. 6. THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED AS NECESSARY TO ENSURE THEIR CONTINUED FUNCTIONING. SILTATION BARRIERS AND ALL OTHER TESC MEASURES SHALL BE INSPECTED Al-ILH EACH RAINFALL EVENT GREATER THAN 0.1" RAINFALL, AND AT LEAST DAILY DURING PROLONGED RAINFALL EVENTS. 7. AT NO TIME SHALL MORE THAN SIX INCHES OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A TRAPPED CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PLACING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT OR SEDIMENT LADEN WATER INTO THE DOWNSTREAM SYSTEM. 8. STABILIZED, CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR 1HE DURATION OF THE PROJECT. ADDITIONAL MEASURES MAY BE REQUIRED TO INSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT. ALL STREETS ARE TO BE KEPT CLEAR OF DIRT AND DEBRIS. STREETS SHALL BE SWEPT WHEN DIRT HAS BEEN TRACKED ONTO THE PAVED SURFACES.POST, 9. SOIL STOCKPILES SHALL BE STABILIZED WITHIN 24 HOURS. WHEN ACTIVELY WORKING WITH THE SOIL STOCKPILE, STABILIZATION SHALL OCCUR AT THE END OF EACH WORKDAY. 10. ALL PERSONS ENGAGING IN DEVELOPMENT ACTIVITIES SHALL PREVENT OR MINIMIZE EROSION AND SEDIMENTATION ON -SIZE, AND SHALL PROTECT PROPERTIES AND WATER COURSES DOWNSTREAM FROM THE SITE. 11. TESC FACILITIES AND STRUCTURES SHALL BE REPAIRED IMMEDIATELY UPON RECOGNITION OF A PROBLEM OR WHEN TESC MEASURES BECOME DAMAGED. 12. SUFFICIENT TESC BMP MATERIALS AND SUPPLIES TO PROTECT THE ENTIRE SITE SHALL BE INSTALLED AND/OR STOCKPILED ONSITE. 13. EXCAVATED MATERIALS SHALL BE PLACED UP SLOPE OF THE TRENCH TO THE MAXIMUM EXTENT FEASIBLE 14. SEE CONSTRUCTION SEQUENCE ON SHEET 1. WET SEASON GRADING NOTES (ocT 1 - MAR 31) z ■■■■■ v RETRIEVAL SYSTEM FRAME GRATE.BIM 5 u o■ ..... :::::. SEDIMENT AND DEBRIS _ 1 N, - =III �i, iii-111=I-ILI±II I ' =' 11;a I MI 1HT1=111-i - BURY BOTTOM OF FILTER MATERIAL 4" f 6' MAX. - ii =Ji -I I ll- �--- I I \T-1 -- ,�� '"' """"---""""_ ' FILTERED l _' / y OVERFLOW Y 11_ U T m 2"x2" WOOD POSTS OR EQUIVALENT 2"x2" WOOD OR EQUIVALENT ELEVATION 2•x2" WOOD OR WATER BYPASS GEOTEXTILE d 0 7 FABRIC SECURED TO 2'x2" 14 GA. WIRE FABRIC OR EQUAL EQUIVALENT 0.44 2T'=+°• t 1 ybsW 5 q : I "' vb ,° g y 4- Q�ee Q ; < - ., .`e ,e .. - Iq,! �i' NOTES: STAPLES - 4 PER EVENLY SPACED 1 � IaIH>NN_ I N FILTER FABRIC SECURED TO 2"x2" 14 GA. WIRE FABRIC OR EQUAL �' �UI =a ..._ of N 11 Z 1. SIZE THE BELOW GRATE INLET DEVICE ID) FOR THE STORM WATER STRUCTURE (BGID) IT WILL SERVICE. 2. THE BGID SHALL. HAVE A BUILT-IN HIGH-FLOW RELIEF SYSTEM (OVERFLOW BYPASS). 3. THE RETRIEVAL SYSTEM MUST ALLOW REMOVAL OF THE BGID WITHOUT SPILLING THE COLLECTED MATERIAL. 4. ANY ACCUMULATED SEDIMENT ON OR AROUND INLET PROTECTION SHALL BE REMOVED IMMEDIATELY. SEDIMENT SHALL NOT BE REMOVED WITH WATER, AND ALL SEDIMENT MUST BE DISPOSED OF AS FILL ON SITE OR HAULED OFF SITE. 5. ANY SEDIMENT IN THE CATCH BASIN INSERT SHALL BE REMOVED WHEN THE SEDIMENT HAS FILLED ONE-THIRD OF THE AVAILABLE STORAGE OR 12", WHICHEVER IS LESS. THE FILTER MEDIA FOR THE INSERT SHALL BE CLEANED OR REPLACED AT LEAST MONTHLY, IF APPLICABLE. DETAIL - CATCH BASIN INSERT TSI I III -h • "'I�111. �- -_ ILL -II 4' SII le. �� • O �_` _~DO I III =11LTIIEB1i=- . 2 it 1. OE • 1°4 _ ?� „� e r evlll e �• /73' CONTRACTOR SHALL EMBED FILTER FABRIC FENCE 4" INTO SOIL USING HAND SPADE OR OTHER SIMILAR TOOL TO FORM "'- PLACE 3/4"-11/2" WASHED GRAVEL IN THE TRENCH AND ON BOTH SIDES OF FILTER FABRIC FENCE ON THE SURFACE. 4" -11-1[EEL-, -� I_ !� SLOT. TYPE A TYPE B USE FILTER FABRIC FENCE TYPE A OR B AS WARRANTED/DIRECTED DURING CONSTRUCTION DETAIL - FILTER FABRIC/SILT FENCE 1. THE SQUARENFEETCTION SEQUENCE OF DIRT WILL BE EXPOSED ATANYALL BE DTO TIME.MINIMIZE THE AREA OF UNSTABIUZED SOIL A MAXIMUM OF 1,000 2. EARTHEN AREAS THAT ARE SUBJECT TO CONTRIBUTING SEDIMENTS DURING STORM EVENTS AND WHERE EARTH MOVEMENT IS NOT ANTICIPATED FOR 48 -HOURS SHALL BE STABILIZED USING THE FOLLOWING BMPS: HYDROSEEDING, MULCHING (4" THICK STRAW ON ALL EXPOSED SOIL) AND/OR PLASTIC COVERING/SHEETING OVER ALL EXPOSED SOIL AND STOCKPILES. 3. WET SEASON TESC MEASURES WILL BE EXPANDED TO INCLUDE ADDITIONAL SILT FENCE (INSTALLED INSIDE THE ORIGINAL SILT FENCE), SEDIMENT TRAP/POND OR OTHER NECESSARY MEASURES. 4. SOILS SHALL NOT BE DISTURBED EXCEPT FOR ACTUAL CONSTRUCTION ACTIVITIES. PARKING IS ALLOWED ONLY ON PAVED AND/OR GRAVEL SURFACES. 5. SLOPES 85 AND GREATER WITHOUT ESTABUSHED GROUNDCOVER WILL BE STABILIZED IMTH PLASTIC SHEETING, 6 -MIL (MINIMUM). THE SHEETING SHALL BE ANCHORED WITH SAND BAGS LOCATED 5 -FEET APART ON THE PERIMETER AND 10 -FEET ON CENTER ON THE REMAINDER OF THE SHEETING. A MINIMUM OF 2 -FEET OVERLAP IS REQUIRED FOR OVERLAPPING SHEETS. 6. WATER DISCHARGED FROM THE SITE WILL BE MONITORED FOR TURBIDITY. MAXIMUM ALLOWABLE TURBIDITY OF DISCHARGED/ WATER WILL BE 5 NTU OVER BACKGROUND.Og 7. WHEN RAINFALL IS HEAVY (DEFINED AS RAINFALL HARD ENOUGH TO PRODUCE SEDIMENT RUN-OFF FROM EXPOSED DIRT), ALL EXPOSED EARTHWORK SHALL BE COVERED. NO OTHER CONSTRUCTION ACTIVITY SHALL OCCUR ON PERVIOUS SURFACES DURING THESE PERIODS OF HEAVY RAIN.ZS� B. ALL DRAINAGE SWALES SHALL BE FULLY VEGETATED. SWALES SHALL BE SODDED IF THE VEGETATION GROWING IN THE SWALE IS INSUFF1CIENT TO PROVIDE WATER QUAUTY AND TO PREVENT EROSION OF THE SWALE. 9. ANY WATER REMOVED FROM EXCAVATION AREAS SHALL MEET TURBIDITY REQUIREMENTS PRIOR TO DISCHARGE FROM SITE. POTENTIAL POLLUTANTS 12507 BEL -RED ROAD SUITE W1 BELLEVUE, WA 860052500 TEL 4255673689 -FAX 425667.3650 CHSENGINEERS, LLC www.chseng/neers.com Drawn / Date Designed / Date Checked / Date 88 7-14 EZ 7-14 EZ 7-14 NT5 ® NTS ® - a� P��F, 'O. � �1 �oo� � ��. /� t� � �u , �� 12" MIN. 21¢" PERMEABLE BALLAST, WSDOT - '000 -(' /i �� " I� SQ. MIN �• •:"� _ _. �_Ajr:,{ C7 •10 E3 - qf_ "" o_,1�� Mi .. "V,�r� S� ___ _ _�_..�� . _ _� -�" e 34`�� i"ly�:. _ Or-�•. 11.,�;� '1" 2" x 2" x 3' - 0" WOODEN STAKE WATTLE WAT LE SANDBAG ` III `a KING COUNTY WATER DISTRICT NO. 20 SOUTH 125TH STREET EASEMENT WATER MAIN REPLACEMENT SEDIMENT CONTROL NOTES AND DETAILS '�d'�y�f- Z 5 I paq4 -.��j �� 0. 1. HAZARDOUS CHEMICALS SHALL BE STORED IN AN APPROVED CHEMICAL STORAGE FACILITY. WHEN USING CHEMICALS, CARE SHALL BE TAKEN TO GUARD AGAINST SPILLAGE. IN THE EVENT OF CHEMICAL RELEASE, THE APPROPRIATE AUTHORITIES SHALL BE CONTACTED AND THE SPILL SHALL BE CLEANED IMMEDIATELY. 2. PETROLEUM PRODUCTS: ALL EQUIPMENT SHALL BE INSPECTED REGULARLY TO DETECT ANY LEAKS OR SPILLS AND TO IDENTIFY NECESSARY MAINTENANCE. ONSITE FUELING TANKS AND PETROLEUM PRODUCT STORAGE CONTAINERS SHALL INCLUDE SECONDARY CONTAINMENT. SPILL PREVENTION MEASURES, SUCH AS DRIP PANS AND LINERS, SHALL BE USED IN A DESIGNATED AREA. CONTAMINATED SURFACES SHALL BE CLEANED IMMEDIATELY FOLLOWING ANY DISCHARGE OR SPILL INCIDENT. NOTES: 1. WATTLES SHALL BE IN ACCORDANCE WITH WSDOT STANDARD SPECIFICATION 9-14.5(5). 2. SECURELY KNOT EACH END OF WATTLE. ABUT ADJACENT WATTLES TIGHTLY, END TO END, WITHOUT OVERLAPPING THE ENDS. RUNOFF SHALL NOT BE ALLOWED UNDER OR AROUND ROLL ENDS. 3. PILOT HOLES MAY BE DRIVEN THROUGH THE WATTLES AND INTO THE SOIL WHEN SOIL CONDITIONS REQUIRE. 4. WATTLES SHALL BE INSPECTED REGULARLY, AND IMMEDIATELY AFTER A RAINFALL PRODUCES RUNOFF, TO ENSURE THEY REMAIN THOROUGHLY IN CONTACT WITH THE SURFACE. e- �`.,�) 5. PERFORM MAINTENANCE IN ACCORDANCE WITH WSDOT STANDARFSPECI-' -- FICATION 8-01.3(15). A�, �� 1 C/s, % , e DETAIL - STRAW WATTLE a 9-03.9(2) OR APPROVED. GEOTEXTILE FABRIC PROVIDE FULL WIDTH OF INGRESS/EGRESS AREA MAINTENANCE THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO RIGHTS-OF-WAY OR ADJACENT PROPERTY. THIS MAY REWIRE PERIODIC TOP DRESSING, AS CONDITIONS DEMAND, AND REPAIR AND/OR CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED OR TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED. ® DETAIL - TEMP CONSTRUCTION ENTRANCE 811 Sheet g Of 6 Il.o.rwesbalOtr. CallbotoroyoYmO.1 APPROVED BY KCWD NO. 20 DATE Job No. 111402 - J NTS NTS • ' P r.N j' 0% M 50%, REDUCTION SE1