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19-103472
CITY OF V;A�AL �)JL 19 2M PERM I ..1 APPLICATION C)TY OF FEIC': RAL W'PERMIT CENTER + 33325 8rh Avenue South + Federal Way, WA 98003-6325 Federal Way COMMUNI jY DML OPM2E(T[253-835-26a7 + FAX 253-835-2609 + permitcenterrScityoffederaiway.com PERMIT NUMBER _ f _` TARGET DATE _ SITE ADDRESS SUITE/UNIT # 3600 S. 344th Way, Federal Way, WA 98001 N/A PROJECT VALUATION TYPE OF PERMIT NAME OF PROJECT PROJECT DESCRIPTION Detailed description of work to be included on this permit only PROPERTY OWNER CONTRACTOR APPLICANT PROJECT CONTACT (The individual to receive and respond to all correspondence concerning this application) PROJECT FINANCING When value is $5,000 or more (RCW 19.27.095) ZONING ASSESSOR'S TAX/PARCEL # OP-1 / OP-3 726120-0221 ❑ BUILDING ❑ PLUMBING ❑ MECHANICAL ❑ DEMOLITION X ENGINEERING ❑ FIRE PREVENTION FWPS Elementary School No. 24 (ES24) Scope will be to grind and overlay 344"'; thatching up to the existing pavement seam, approximately at the fog line at Weyerhaeuser Way S., to the east property line of the subject site; replacing the two ADA ramps at the NE and SE quadrants of the intersection of 344' and Weyerhaeuser; and replacement of the channelization. NAME PRIMARY PHONE Michael Swartz, Federal WaY Public Schools 253 945-5992 MAILING ADDRESS E-MAIL 1211 S. 332nd Street msw s_or CITY STATE ZIP Federal Way WA 98003 I NAME PHONE FORMA Construction 360 754-5788 MAILING ADDRESS E-MAIL 2823 29th Ave. SW ryanKorrnacc.com CITY STATE ZIP FAX urawater WA 98512 360 943-5868 WA STATE CONTRACTOR'S LICENSE # F_XPIRATION DATE FEDERAL WAY BUSINESS LICENSE # FORMACC878OR EX . 9 19 19 20-18-104415-00-BL NAME PRIMARY PHONE Casey Moore Federal Way Public Schools 253 945-5935 MAILING ADDRESS E-MAIL 1211 S. 332nd Street cmoor s.or CITY STATE ZIP FAX Federal Way WA 9$003 N/A NAME PRIMARY PHONE Glenn Steiner, Federal Way Public Schools 425 749-8271 MAILING ADDRESS E-MAIL 1211 S. 332nd Street steine s.or CITY STATE ZIP FAX Federal Way WA 98003 N/A NAME ✓ OWNER -FINANCED Federal Way Public Schools MAILING ADDRESS, CITY, STATE, ZIP PHONE 33330 8TH Avenue South, Federal WayWA 98003 253 945-2000 I certify under penalty of perjury that I am the property owner or authorized agent of the property owner. I certify that to the best of my knowledge, the information submitted in support of this permit application is true and correct. I certify that I will comply with all applicable City of Federal Way regulations pertaining to the work authorized by the issuance of a permit. I understand that the issuance of this permit does not remove the owner's responsibility for compliance with local, state, or federal laws regulating construction or environmental laws. rfurther agree to hold harmless the City of Federal Way as to any claim (including costs, expenses, and attorneys' fees incurred in the investigation and defense of such claim), which may be made by any person, including the undersigned, and filed against the city, but only where st^cWm arises out of the reliance of the city, including its officers and employees, upon the accuracy of the Information supplied lthq ci r# as a part q/this application. SIGNATURE: July 18, 2019 PRINT NAME: Casey Moore MECHANICAL PERMIT VALUE OF MECHANICAL WORK I$N/ A Indicate how manM of eacil Wpe qLfixture to be installed or relocated as part of this project. 1k not include existing Lures to remain. AIR HANDLING UNITS FANS GAS PIPE OUTLETS OTHER (Describe) AIR CONDITIONER FIREPLACE INSERTS HOODS (commercial) BOILERS FURNACES HOT WATER TANKS (Gas) COMPRESSORS GAS LOG SETS REFRIGERATION SYST DUCTING GAS PIPING WOODSTOVES PLUMBING PERMIT VALUE OF PLUMBING WORK $ N/A Indicate how rnaRM of each Wpe offixture to be installed or relocated as part 9L this project. Do nat include existing Enures to remain. BATHTUBS (or Tub/shower combo) LAVS (Hand sinks) TOILETS WATER PIPING DISHWASHERS RAINWATER SYSTEMS URINALS OTHER (Describe) DRAINS SHOWERS VACUUM BREAKERS DRINKING FOUNTAINS SINKS (Kitchen/Utmry) WATER HEATERS (Electric) HOSE BIBBS SUMPS WASHING MACHINES TOTAL FIXTURES GENERAL INFORMATION CRITICAL AREAS ON PROPERTY? WATER PURVEYOR SEWER PURVEYOR VALUE OF EXISTING IMPROVEMENTS N/A N/A N/A $,_ N/A EXISTING/PREVIOUS USE LOT SIZE )In Squue Feet) EXISTING FIRE SPRINKLER SYSTEM? PROPOSED FIRE SUPPRESSION SYSTEM? N/A N/A ❑ Yes ❑ No ❑ Yes ❑ No RESIDENTIAL - NEW OR ADDITION AREA DESCRIPTION (in square feet) EXISTING PROPOSED TOTAL FOR OFFICE USE BASEMENT N/A N/A N/A FIRST FLOOR (or Mobile Home) SECOND FLOOR N/A N/A N/A N/A N/A N/A COVERED ENTRY N/A N/A N/A DECK GARAGE ❑ CARPORT ❑ N/A N/A N/A N/A N/A N/A OTHER (describe) N/A N/A N/A Area Totals EXISTING N/A PROPOSED N/A TOTAL N/A **NEW HOMES ONLY** ESTIMATED SELLING PRICE $_ N/A # OF BEDROOMS COMMERCIAL - NEW/ADDITION AREA DESCRIPTION Area in S uare Feet Occupancy Group(s) Construction # of Additional Information Typa Stories NEW BUILMING N/A N A NIA NA NIA ADDITION N/A N/A NA N/A NA COMMERCIAL - REMODEL/TENANT IMPROVEMENTS AREA DESCRIPTION Area in Square Feet Occupancy Groups) Construction # of Additional Information lzea Stories TOTAL BuiLDnrG N/A N/A N/A N/A NJA TENANT AREA ONLY N/A N/A N/A N/A N/A PRoaEcTAREA GNLY N/A N/A N/A NJA N/A Bulletin #100 —January 29, 2016 Page 2 of 2 kAHandouts\Permit Application RESUBMITTED ► UG 0 2 2019 CfTY OF "E WAY COMMUNITY DA'&PMENT August 2, 2019 Cole Elliott, PE Development Services Manager City of Federal Way 33325 8th Avenue South Federal Way, WA 98003-6325 Project: FWPS Elementary School 24 (Devry Property), AHBL No. 2180930.10 Subject: Response to Comments dated July 26, 2019 Folder No. 19-103472-000-00-EN ,A Lim ■ Dear Cole: This letter is in response to your comments dated July 26, 2019, regarding the above referenced project. The comments are included below (verbatim) for your reference. Our responses are shown in bold after each comment. Technical Information Report (TIR) 1. No comments. Response: Acknowledged. Geotechnical Report 2.. No comments. Response: Acknowledged. Driveway Bus Vehicle Tracking '3. Provide the wheel base length of vehicle modeled. Response: The wheel base length for the vehicle modeled is 23 feet. The vehicle detail has been added to the Bus Vehicle Tracking Exhibit. Plan Set General 4.. Permit number on the approval block should be 19-103472-EN. Please put on all plan sheets. Response: The permit number has been added to the approval block on all plan sheets. Civil Engineers Structural Engineers Landscape Architects Community Planners Land Sorveyors N;arohhors rACOAAA 2215 North 301h Street Suite 300 Tacoma, WA 98403-3350 253.383.2422 a www.ahbi.com Cole Elliott, PE August 2, 2019 2180930.10 Page 2 of 6 Sheet C1.0 Q)5. j City of Federal Way General Note 7 is incorrect for work within right-of-way and shall be !) replaced with the following: RIGHT-OF-WAY CONSTRUCTION IS ALLOWED 8:30 AM TO 3:00 PM MONDAY THROUGH FRIDAY. WRITTEN AUTHORIZATION TO WORK OUTSIDE THESE HOURS MUST BE GRANTED BY THE PUBLIC WORKS DIRECTOR. Response: The City of Federal Way General Note 7 has been revised to state what is written above. Sheet C2.0 Correct Keynote call out numbering so that there are not two Keynote 3 and two ti Keynote 5. Response: The keynotes have been revised so that there are no duplicates. "7,_. Grind at Sta.1+35 at both north and south edges will not extend beyond a minimum 2- foot width of paving between butt joint and gutter. Response: A label has been added to the grind and overlay limits showing the minimum 2 feet between the butt joint and gutter. Sheet C2.1 Correct Keynote call out numbering so that there are not two Keynote 3 and two Keynote 5. Response: The keynotes have been revised so that there are no duplicates. g: In the middle of western most driveway (Sta. 11+10) there is a keynote calling for adjustment of catch basin but the plans do not show a catch basin. Correct. Response: This keynote has been revised to state "DRIVEWAY GATE." No catch basin is located here. 9; The driveway gate proposed at the western most driveway (Approximately Sta. 11+10) must be relocated outside the right-of-way. Additionally, provide adequate storage length. Response: The gate has been moved to be out of the right-of-way and the storage length has been increased to 35 feet. Sheets C2.2 and C2.3 11. No comments. Response: Acknowledged. Cole Elliott, PE . August 2, 2019 2180930.10 Page 3of6 �: Sheet C3.0 12.. Striping Note 1 correct the word "CANALIZATION' to "CHANNELIZATION'. Response: Striping Note 1 has been revised to read "CHANNELIZATION." 13 Add Striping Note 4, which states: "STRIPING SHALL BE PAINTED WITH TYPE 2RPM". Response: Stripping Note 4 has been added. 14. Both call outs at Sta 1+59.71 Insert the word "WIDE" after BEGIN/END and Replace the word "STRIPE" with "LINE". Response: Callouts at STA 1+59.71 have been revised per the direction listed ^� above. 15_ Sta. 1+60.46 should state, "END 18" STOP LINE WHITE THERMOPLASTIC". Response: STA 1+60.46 label has been revised to state what is listed above. ,._ Sta. 2+03.67, Right Turn Arrow should be called out as TYPE 2SR (Plastic) (Typ). Left Turn Arrow should be called out as TYPE 2SL (Plastic). Response: STA 2+03.67 label has been revised to state what is listed above. -17,. Sta. 2+59.52 Right Turn Arrow must be called out as TYPE 2SR (Plastic) and Left Turn Arrow called out as TYPE 2SL (Plastic). Response: STA 2+59.52 label has been revised to state what is listed above. 18', Turn lane opening should be 100-feet (50'+50') per WSDOT Standard Plan. Response: The turn lane opening has been revised to be 100 feet long. Sta 3+31.77 should be moved to Sta 3+63.58 and add the words (PAINTED WITH TYPE 2RPM) to the call out. Response: STA 3+31.77 label has been revised to state what is listed above. Note the station for this note is now 3+65.01. 20. See WSDOT Standard Plan M-3.40-03 for placement of left turn arrow (Sta. 4+03.54) to Sta. 3+88. Add TYPE 2SL (Plastic). Response: Left -turn arrows have been revised to be placed per WSDOT Standard Plan M-3.40-03. In addition, the label has been revised to add what is listed above. 13© Q Cole Elliott, PE August 2, 2019 2180930.10 Page 4 of 6 21.., See WSDOT Standard Plan M-3.40-03 for placement of left turn arrow (Sta. 4+19.18) to Sta. 4+04. Add TYPE 2SL (Plastic). Response: Left -turn arrows have been revised to be placed per WSDOT Standard Plan M-3.40-03. In addition, the label has been revised to add what is listed above. Sheet C3.1 22. Striping Note 1 correct the word "CANALIZATION' to "CHANNELIZATION'. Response: Striping Note 1 has been revised to read "CHANNELIZATION." Q23 + Add Striping Note 4, which states: "STRIPING SHALL BE PAINTED WITH TYPE 2RPM". Response: Stripping Note 4 has been added. 24.. Turn Arrow call out on Legend must be corrected to TYPE 2SL and 2SR (Plastic). Response: The Legend has been revised to call out the correct turn arrows. The same change was made on C3.0. Type B Sign located within City right-of-way must meet all City standards. Response: This sign has been relocated such that it is outside the right-of-way. '__126. Call out at Sta 15+50 add "END TWO WAY LEFT TURN LANE LINE". Response: The STA 15+50 label has been revised to state what is listed above. Sheet C3.2 27. No comment. Response: Acknowledged. Sheet C4.0 28. On North Curb Ramp Detail, provide radial lengths for the ramp and both wing/transition panels. Response: The radial lengths have been added to the ramp and both wing/transitional panels. 29. On North Curb Ramp Detail, verify that the slope from the bottom of the ramp to the roadway does not exceed 5-percent. Response: This slope from the bottom of the ramp to the roadway does not exceed 5 percent (it is roughly 4.1 percent). QC1' 3 Cole Elliott, PE August 2, 2019 2180930.10 Page 5 of 6 30, On North Curb Ramp Detail, provide slope in percent at the back of curb for each of the panels Response: The slope has been added to the back of curb for each panel. 31. On North Curb Ramp Detail, provide cross slope at top of ramp and verify distance. Response: A cross slope label and distance label has been added to the top of the ramp. 32. On North Curb Ramp Detail, correct the direction for the slope at the top of the wings on both sides. Response: The slope direction has been corrected on the wings. 33. On South Curb Ramp Detail, provide radial lengths for the ramp and both wing/transition panels. Response: The radial lengths have been added to the ramp and both wing/ transitional panels. 34. On South Curb Ramp Detail, verify that the slope from the bottom of the ramp to the roadway does not exceed 5-percent. Response: This slope from the bottom of the ramp to the roadway does not exceed 5 percent (it is roughly 1.2 percent). 35. On South Curb Ramp Detail, provide slope in percent at the back of curb for each of the panels Response: The slope has been added to the back of curb for each panel. 36. On South Curb Ramp Detail, provide cross slope at top of ramp and verify distance. Response: A cross slope label and distance label has been added to the top of the ramp. 37. On South Curb Ramp Detail, correct the direction for the slope at the top of the wings on both sides. Response: The slope direction has been corrected on the wings. 38. Driveway Number 1, remove concrete scribe marks from ramp area. Expansion joints/scribe marks must correspond to Detail 3-6A shown on Sheet C2.2. Response: The concrete scribe marks have been removed from the ramp area. MIDIO Cole Elliott, PE August 2, 2019 mom 2180930.10 Page 6 of 6 ■I 1■ Sheet C4.1 39. Driveway Number 2, remove concrete scribe marks from ramp area. Expansion joint/scribe marks must correspond to Detail 3-6A on Sheet C2.2. Response: The concrete scribe marks have been removed from the ramp area. 40. A comparison of Driveway Number 2 to Driveway Bus Tracking exhibit indicates the western most flat panel can be located approximately 7.5-feet closer to the center of the driveway. Response: The driveway has been revised to move the westernmost flat panel closer to the center of the driveway. We reran the AutoTURN and were able to narrow the driveway further. 41. Increase the mass of the refuge as much as possible without impacting the bus turning path (See plan mark- up). Response: The mass of the refuge island has been increased as much as possible without impacting the bus turning path. 42. Provide stamped concrete island with brick color or contrasting color. Response: A note has been added to provide stamped concrete with brick color inside the island. 43. Vertical curb call out on refuge shall state, "VERTICAL CURB USE RPM'S OR PAINTED EDGE PAVED SURFACE AROUND ISLAND". Response: The vertical curb callout has been revised to include what is mentioned above. If you have any questions, please call me at (253) 383-2422. Sincerely, David C. Nason, PE Associate Principal WT/Isk Q:\2018\2180930\WORDPROC\Letters\20190802 Ur (Resp-FAN) 2180930.10.docx a©aa AkCITY OF Federal Way July 26, 2019 Federal Way Public School Attn: Glenn Steiner 1211 South 332nd Street Federal Way, WA 98003 RE: FWPS ELEMENTARY SCHOOL #24 Folder # 19-103472-000-00-EN; Dear Mr. Steiner: CITY HALL 33325 8th Avenue South Federal Way, WA 98003-6325 (253) 835-7000 www. cityoffederalway. com Jim Ferrell, Mayor Development Services and Public Works Traffic have reviewed the submitted plan packet (plans, Technical information Report (TIR), Geotechnical Report and Bus Turning diagram). We have the following comments and correction: Technical Information Report (TIR) 1. No comments. Geotechnical Report 2. No comments. Driveway Bus Vehicle Tracking 3. Provide the wheel base length of vehicle modeled. Plan Set GENERAL 4. Permit number on the approval block should be 19-103472-EN. Please put on all plan sheets. Sheet C1.0 5. City of Federal Way General Note 7 is incorrect for work within right-of-way and shall be replaced with the following: RIGHT-OF-WAY CONSTRUCTION IS ALLOWED 8:30 AM TO 3:00 PM MONDAY THROUGH FRIDAY. WRITTEN AUTHORIZATION TO WORK OUTSIDE THESE HOURS MUST BE GRANTED BY THE PUBLIC WORKS DIRECTOR. Sheet C2.0 6. Correct Keynote call out numbering so that there are not two Keynote 3 and two Keynote 5. 7. Grind at Sta.1+35 at both north and south edges will not extend beyond a minimum 2-foot width of paving between butt joint and gutter. \\CFWFILE 1\Applications\CSDC\PROD\docs\save\ 159071_79409_24090334.doc GRAPHIC SCALE 0 10 20 40 1" = 20 FEET 2215 North 30th Street Elementary School Number 24 �� Suite 300 dw . � Tacoma, WA 98403 253.383.2422 TEL Driveway Bus Vehicle Tracking � 1010190 253.383.2572 FAX DRAWN BY: WAT 0 VEHICLE TRACKING - BUS SPECIFICATIONS en DATE: 8/02/2019 > Bus Overhang ,d a d .. Wheel base length Devey — School Bus Overall Length 4 0 p_p0ft Overall Width Overall Body He hi 00 ft 8.10 5004t Min Body Ground Clearance 1.070ft 8.0coft Track Width Lock —to —lock time 5.00s Curb to Curb Turning Radius 40.667ft S. 344th Way JOB NO.: 2180930.10 S RESUBMITTED AUG 0 2 2019 CITY OF FEDERAL WAY COMMUNITY DEVEIDPMFNi CSK 01 Sheet C2.1 8. Correct Keynote call out numbering so that there are not two Keynote 3 and two Keynote 5. 9. In the middle of western most driveway (Sta. 11+10) there is a keynote calling for adjustment of catch basin but the plans do not show a catch basin. Correct. 10. The driveway gate proposed at the western most driveway (Approximately Sta. 11+10) must be relocated outside the right-of-way. Additionally, provide adequate storage length. Sheets C2.2 and C2.3 11. No comments. Sheet C3.0 12. Striping Note 1 correct the word "CANALIZATION" to "CHANNELIZATION". 13. Add Striping Note 4, which states: "STRIPING SHALL BE PAINTED WITH TYPE 2RPM". 14. Both call outs at Sta 1+59.71 Insert the word "WIDE" after BEGIN/END and Replace the word "STRIPE" with "LINE". 15. Sta. 1+60.46 should state, "END 18" STOP LINE WHITE THERMOPLASTIC". 16. Sta. 2+03.67, Right Turn Arrow should be called out as TYPE 2SR (Plastic)(Typ). Left Turn Arrow should be called out as TYPE 2SL (Plastic). 17. Sta. 2+59.52 Right Turn Arrow must be called out as TYPE 2SR(Plastic) and Left Turn Arrow called out as TYPE 2SL(Plastic). 18. Turn lane opening should be 100-feet (50'+50') per WSDOT Standard Plan. 19. Sta 3+31.77 should be moved to Sta 3+63.58 and add the words (PAINTED WITH TYPE 2RPM) to the call out. 20. See WSDOT Standard Plan M-3.40-03 for placement of left turn arrow (Sta. 4+03.54) to Sta. 3+88. Add TYPE 2SL (Plastic). 21. See WSDOT Standard Plan M-3.40-03 for placement of left turn arrow (Sta. 4+19.18) to Sta. 4+04. Add TYPE 2SL (Plastic). Sheet C3.1 22. Striping Note 1 correct the word "CANALIZATION" to "CHANNELIZATION". 23. Add Striping Note 4, which states: "STRIPING SHALL BE PAINTED WITH TYPE 2RPM"_ 24. Turn Arrow call out on Legend must be corrected to TYPE 2SL and 2SR (Plastic). 25. Type B Sign located within City right-of-way must meet all City standards. 26. Call out at Sta 15+50 add "END TWO WAY LEFT TURN LANE LINE". Sheet C3.2 27. No comment. Sheet C4.0 28. On North Curb Ramp Detail, provide radial lengths for the ramp and both wing/transition panels. \\CF WF1LE 1\Applications\CSDC\PROD\docs\cave\ 159071_79409_24090334.doc 29.On North Curb Ramp Detail, verify that the slope from the bottom of the ramp to the roadway does not exceed 5-percent. 30. On North Curb Ramp Detail, provide slope in percent at the back of curb for each of the panels 31. On North Curb Ramp Detail, provide cross slope at top of ramp and verify distance. 32.On North Curb Ramp Detail, correct the direction for the slope at the top of the wings on both sides. 33.On South Curb Ramp Detail, provide radial lengths for the ramp and both wing/transition panels. 34.On South Curb Ramp Detail, verify that the slope from the bottom of the ramp to the roadway does not exceed 5-percent. 35.On South Curb Ramp Detail, provide slope in percent at the back of curb for each of the panels 36. On South Curb Ramp Detail, provide cross slope at top of ramp and verify distance. 37.On South Curb Ramp Detail, correct the direction for the slope at the top of the wings on both sides. 38. Driveway Number 1, remove concrete scribe marks from ramp area. Expansion joints/scribe marks must correspond to Detail 3-6A shown on Sheet C2.2. Sheet C4.1 39. Driveway Number 2, remove concrete scribe marks from ramp area. Expansion joint/scribe marks must correspond to Detail 3-6A on Sheet C2.2. 40. A comparison of Driveway Number 2 to Driveway Bus Tracking exhibit indicates the western most flat panel can be located approximately 7.5-feet closer to the center of the driveway. 41. Increase the mass of the refuge as much as possible without impacting the bus turning path (See plan mark- up). 42. Provide stamped concrete island with brick color or contrasting color. 43. Vertical curb call out on refuge shall state, "VERTICAL CURB USE RPM'S OR PAINTED EDGE PAVED SURFACE AROUND ISLAND". Please resubmit the plan set once the comments have been addressed. If you have any questions or need additional clarification please contact me at (253) 835-2730 or by e-mail at cole.efliott@cityoffederalway.com Sincerely, Cole Elliott, P.E. Development Services Manager cc: David Nason, P.E., AHBL, 2215 N. 30th Street, Suite 300, Tacoma, WA 98403 Kevin Peterson, City of Federal Way Sarady Long, City of Federal Way Project File Day File \\CF WFILEIWpplications\CSDC\PROD\docs\save\ 15 9071_79409_24090334.doc WILD` OOD and LAKE GROVE PARKING AT THE TEMPORARY CAMPUS 3600 S 344th Way Federal Way, WA 98003 September 2019 Bus transportation to and from the temporary location is provided for all scholars. Parents who choose to drive their child to school must park in the designated parent parking area and walk their child to the entrance of the school. KEY PARENT/VISITOR ENTRANCE AND STUDENT DROP-OFF ROUTE • • • •® SAFE WALKING ROUTES & CROSSWALKS ~-' SCHOOL BUS ROUTE SCHOOL BUS & STAFF ENTRANCE r PARENT/VISITOR PARKING 1h On = ffaMMMMOOMMOMME ! _MT ■ 1 ■ ! r ■ r PARENT/VISITOR PARKING 9 ! PARENT/FAMILY ■ ACCESS * * ■ * ya f � UUT$011ND r (\(j..• WILll14001O•G. ��L ENTRY • LAKE GROVE •. ENTRY • • SCHOOL BUS/ SIAFFENTRANCE S. 344th WAY FEDERAL WAY PUBLIC SCHOOLS E524 Timeline for Water Quality, Frontage and 344th Improvements: January 31, 2019 School District submitted Land Use application to convert former Devey building to a school use February 20, 2019 Concurrency Application Received February 20, 2019 Concurrency Application determined complete February 21, 2019 City review #1 provided to District, Public Works identified that required Stormwater Water Quality design, Traffic Impact Analysis, bus turning movements, Traffic Level of Service, Pavement analysis of 344th, Concurrency application, and more was not included. School District requested waiver of meeting required stormwater water quality March 7, 2019 improvements Land Use Resubmission #1 submitted to City Met with School District twice, they requested to hold reviewing Resubmission #1 and March 11, 2019 March 12, 15, 2019 would submit corrected drawings based on feedback from meetings March 14, 2019 City responded to stormwater waiver request that based on submitted materials included in Change of Use application, per FWRC 19.30.120 stormwater improvements are required March 22, 2019 Land Use Resubmission #2 submitted to City March 25, 2019 Concurrency approved and sent to District March 27, 2019 City review #2, acknowledged that review was for plans submitted March 22, 2019, water quality method doesn't meet the requirements and no design information provided. Submitted traffic plans depicted required school bus enter oncoming traffic to enter school. Remainder of Public Works comments from February 21't still outstanding. Traffic identifies requirement for School Zone Flashers April 11, 2019 Land Use Resubmission #3 submitted to City April 15, 2019 Water Quality requirements satisfied for Land Use permit April 18, 2019 j School District applies for Building Permit 19-101838-CO, which includes on -site and WQ 11I1 items for Public Works Review April 19, 2019 City review #3 to School District identifying outstanding Traffic Division comments, some of which were not addressed and repeated from previous review letters and others partially addressed May 1, 2019 Land Use Resubmission #4 submitted to City, including TIA addendum May 3, 2019 Met with School District and reviewed revised plans. Plans were not revised to address previous traffic comments including bus movements, turning diagrams, curb openings, road conditions or school zone flashers. District informed the City they want to review alternate bus routing to avoid needing to improve 3441h and holding on that portion. May 8, 2019 Land Use Resubmission #5 submitted to City, including driveway turning diagrams May 8, 2019 District notified City of errors in submission and will be bringing in revised plans May 9, 2019 Land Use Resubmission #5A submitted to City May 10, 2019 School District requested City to install School Zone Flashers at District's expense in lieu of requiring District to complete work based on time remaining before start of school and their ability to procure materials. Public Works agreed to perform this work for them. May 14, 2019 Land Use Resubmission #6 submitted to City. District requested to defer submitting required II plans for frontage improvements until of l-t r land use so they could work on the building. May 1517, 2019 Conversations between staff and corrections of minor errors to drawings, District provided corrected Rages Land Use approval issued by City, with Conditions (included at the end of this timeline) for May 17, 2019 frontage improvements. May 20, 2019 May 29, 2019 May 30, 2019, June 7, 2019, June 14, 2019 June 10, 2019 June 11, 2019 June 17, 2019 July 4, 2019 July 5, 2019 July 7, 2019 July 18, 2019 July 19, 2019 July 26, 2019 June 27, 2019 July 31, 2019 August 2, 2019 August 2, 2019 August 5-9, 2019 August 12, 2019 August 12, 2019 August 13-14, 2019 August 15, 2019 Although required prior to permit issuance, to allow the District to work on the building Public Works agrees to allow deferring required frontage improvement design and submission to a separate permit. Building Permit is issued, with same conditions attached to the SITE plan set from land use Phone call with District requesting status of frontage improvements submission. Public Works is told no change in status from May 3rd and they are reviewing alternate bus routes verse improvements to 344th and it will becoming 'shortly' Meetings with School District at which concern was expressed by the City that nothing has been submitted yet for frontage improvements and adequate time is needed for City to review and District to build prior to start of school. Meeting is held at the request of Forma, with Building Official and DS Reviewer and Manager, to discuss the TCO conditions referenced on the approved Building Permit (19- 101838-CO) School District applies for Request to Change LU Conditions #1 and #3 District notified City they will not be pursuing alternate bus routing and will be submitting improvements for 3441h to meet bus requirements. Email from City asking status on submission and expressing concern that the District will not meet schedule. District emailed back plans will not be submitted until July 17, 2019 City responded to District reminding them the City needs time to review after it is submitted, the bus entrance work needs to be completed before it can be used for the school year, and again expressing concern that it hasn't been previously submitted. City approved modifying conditions requested June 11, 2019 Plans and permit for 340 and frontage improvements submitted to City — Permit #19- 103472-EN Review letter (w/redline plans) issued to District Public Works responds with e-mail to civil engineer, providing information from 7/26 directly to their engineer Redlines for 344th/frontage plans uploaded to City ftp site for civil engineer access/review Resubmission #1 submitted for 3441h and frontage improvements submitted to City School Zone Flashers installation completed by City Multiple meetings and phone calls between staff to discuss items from July 26 review that were not addressed Resubmission #2 submitted far 344th and frontage improvements submitted to City Resubmitted plans reviewed and approved by City. Approved plans returned to school district for copying/signatures. Project bonding documents prepared and executed Permit issued, waived wait time for recording documents, plan compilation, etc. and held pre -construction meeting same day as permit issuance Conditions 2 and 3 below are not permitted practice by Public Works for projects. Our standard is to require that all design work and plans be submitted and approved prior to issuance of a Building Permit. This was broken out separately at the request of the School District to facilitate them working on the building while still completing the design for frontage improvements. By our standards for projects, based on the above timeline, Public Works would not have agreed to sign off on our portion of building permit issuance for this project until August 15, 2019. W20-1 ROAD WORK W3-4 AHEAD BE 2 0' Ni PREPARED TO STOP W20-7a 2T5 Nr5 200' N S 12' ll� MIN N LEGEND TMI CONTACT PERSON: Valeriy Kotyay TCS CERT #: 008319 FLAGGER WITH RADIO COMMUNICATION SPOTTER TO A5515T WITH PEDE5TRIAN TRAFFIC FLAGGER WITH RADIO COMMUNICATION W220-77a 200' / � ® - WORK AREA I - TYPE -III BARRICADE W/ SIGN FLAGGER X - TYPE -II BARRICADE W/ SIGN - FLASHING ARROW SIGN (FA5) ]I - ADA BARRICADE W/ SIGN uP.o UNIFORMED POLICE OFFICER 0 - CHANNELIZATION DEVICE d EX15TING SIGN oI - SIGN NOTIFY AFFECTED 13USINE55E5 ABOUT TEMPORARY DRIVEWAY CL05UKE MATCH LINE A 5 344TH WAY & WEYERHAEU5ER WAY 5 F E D E KA L WAY, WA 98001 f SEE ABOVE MATCH LINE A r SEE BELOW _._ 5POTTER WITH RADIO COMMUNICATION 1 \X puflCI:• 7 0' 25' 50, 100' SCALE: 1 " = 50' NOTIFY AFFECTED P1-151NE55E5 ABOUT TEMPORARY DRIVEWAY CL05URE 51'OTTER WITH r RADIO COMMUNICATION CHANNELIZATION DEVICE SPACING (feet) MPH TAPER TANGENT 50/70 40 80 35/45 30 60 25/30 20 40 w� w 2 LI w w M. WORK AREA TRAFFIC CONTROL:5 644TH WAY GRIND AND OVERLAY CONTACT: MIKE AGOSTINO TRAFFIC MANAGEMENT, INC. CONTACT: 206 455-5581 California • Great Lakes • Pacific Northwest JOB NUMBER: 202635 FLAN#: 49395 800.763.3999 www.trafficmanagement.c PERMIT NUMBER: om TM Traffic Control Services • Sales & Rantar, SHEET 3 OF 4 51ZE: [3 SCALE: 1"=50' Permits& Consulting• Engineering• Training DATE: 8/6/2019 PREPARED BY: VK C31 # 785804 a A S 33GU� }L AI FOUND 1.10N IN CAS:. ?' IR014 P'FE -r ILL_0 1h TI'. CONC -0.22 LELON' GRADE _ 'vmA k SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. N GRAPHIC SCALE T �P 1" = SO FEET y ]H+� ii 1i1r•: 1 PROJECT LOCATION StNtl,4 — --� J+ - •-� — — ^ f � �2 FCUNII lA 011 I'4 CASE JJ u WA-18 3" ERASS DISC: MTH PLNCH -2.5' BELOe! G,TAl)E 1��y+� `;-1 im,tn r /• FCLNO NON IN LASE 2• BRASS NABK: - - ER :'.HOT DENIER -Q 3B BRLPY GRADE S i #6 FOUND 1X3'1' IN CASE / 2" BRANS DISK LO FUNI:H� S DI 6ELOW GRACE L / ...; .-. CITY OF FEDERAL WAY GENERAL NOTES �� TO THE CITY PRIOR TO PRE -CONSTRUCTION Y CLIENT LI 1. PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED MEETING. - s 11p, 11 2. ALL CONSTRL'CTIQN SHALL BE IN ACCOROAr-ME WI TO 111E FEDERAL WAY REVISED CODE iPNRCj, - VICINITY MAP N •' { •� + " !�+. J. / FE WAY PUBiJ0 SCHDRLS 53930 aTH AVENUE SOUTH FEDERAL WAY, WA 911103 APPLICABLE DRO NANOES, AND THE ONCWNCRCOND'E 'j OF PROJECT ir1ESE 1JOCUMENTS AAE SUPPLEAIENTEG 8Y Th1E MOST RECEN7ERS!ON OF THE SYANDARb CONTAPHONECT: CAS EY CORE YHE KING ROAD. BRIDCE.AN.7 MUHING CONSTRUCTION (ATIEq NO SCALE / 5. 5957COMry CB.5KW CCUNIY RCW9 STANDARDS O[CRSI.AND TIC KIN3COUNTY SkJRFACE WA D'rM EPRO MA'e11JF1 ROAD S AN (CANT ANRTiIE PROFESS AL / EMAIL:cMOORE@FWPS.ORG ti(CSWRM). IT SMALL BE THE SOLE RESPONSIBILITYOF TI•� APPL Tp CORRECT ANY DR VA RIATKANFR01A / f OWNER'S REPRESENTATIVE CORRECT IONSKAN FOUND IR AL OS. OR FOUND IN THESE PLANS. ALL CORREC1i0NSSTLALLEE AT f7CA7mTIONAI COST 01i 11ABILITY YC YY-E CITY OF FEDERAL WAY. GREENE-GASAWAY ARCHITECTS PO BOX 4158 3, THE DESIGN ELEMENTS WITHIN THESE PLANS HAVE BEEN REVIEWED ACCORDING 70 THE FEFJERAL FEDERAL WAY, WA 08063 WAY ENGINEERING REVIEW CHECKLIST. SOME ELEMENTS MAY HAVE BEEN OVERLOOKED OR MISSED CONTACT: TONY 6MTIATOS BY THE CITY ENGINEERING PLAN REVIEWER, ANY VARIANCE FROM ADOPTED STANDARDS 15 NOT / / t,A PHONE: (253) 941-4937 ALLOWED UNLESS SPECIFICALLY APPROVED BY THE CITY OF FEDERAL WAY, PRIOR TO EMAIL: IDny@gmenega5a y. CONSTRUCTIOR APPROVAL CIVIL ENGINEER 4. APPROVAL OF THIS ROAD.GRADING OF ANY OTHER CONSTRUCTION (LE_ DOME TER CONVEYANCE. SEWER CONVEYANCE. GAS. AHBL INC. 200 ELECTRICITY, ETC.) 2215 NORTH 30TH STREET, SUITE 5. BEFOREA04Y CONSTRUCTION OR DEVGLOPIAENT ACTNFrY. A PRECON5TFi11CT1OK ME ETING MUST `�_ X • , / / TACOMA, WA 98403 CON7ACT:OAVID NASON, PE BE HELD BETWEEN THE CITY OF FEDERAL WAY, THE APPLICANT. AND THE AFPLICAN TS I CO , J - PHONE.(253)@atibi.c EMAIL: dnason@ahW.com CONSTRUCTION REPRESENTATIVE fi. A SIGNED COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER I r FILL SPECIFICATION CONS !RUCTION IS IN PROGRESS. , / / FILL MATERIAL SHALL NOT CONTAIN PETROLEUM PRODUCTS, OR T, RIGHT-OF-0YAY CON ISALLD'A'ED F']0 A41 TO 3:00 PM MONRAY THROUGH PRIORY. yy(j1T-{y;NAIJTFID$t7A- i' DRK OUT8IDE THESE HDURS AILISY BE 6FNTCi} BY 7HB PURL n / •' j'f SUBSTANCES WHICH ARE HAZARDOUS, DANGEROUS, TO%IC,ORWINCH OTHERWISE VIOLATE ANY STATE, FEDERAL. OR LOCAL LAW, ORDMANCE. D /J - EXISTING LEGEND CODE. REGULATION, RULE. ORDER, OR STANDARD 10 FRANCHISEDL / TRENCH NOTE PLANSSHALLNO E y .tenAfNGnl Nlul n3rr,LU IF WORKERS ENTER ANY TRENCH OR OTHER EXCAVATION FOUR OR MORE FEET IN FEDERAL FEDERALDERAL WAY DEPTH THAT DOES NOT MEET THE OPEN PIT REQUIREMENTS OF WSDOT SECTION 11 VERTICAL .� al rt 4'4p=,• 2.0E-3;3)B. rr SHALL BE SkcORFD AND CR]BSEO. T1£COhITRACTOR ALONE SHALL BE RE""IRUE FOR NORKtiR SAF@NAMB AHBL ASSU1dES NO RO,,RA.Si81LTTY. ALL TRCNC4i SAF1EW$YDTEMS $HALL).14ET THE RE.^"UIREATEI T3 OF THE VlASHgJD70N I .I !~ u y�l Aa 11611 a INDUSTML SAFETY AND HEALTH ACT. CHM1PYER.O.IY RCW, CHAPTER 49.17 RGW. I J [y � nailH ll otMn6LAW1'.E ,�gDw�•'1�.�Ltry UTILITY NOTE ! hE LOOAY1R145 OF EACiST11IG UND:JKiR17UND UF1LIrE$ ARE APPROCCBIATE ONLY AND / © w wr.44 mvaromu1•M HAVE NOT BEEN INDEPENYIE.N%Y VE:RTFIED SY THE (MMER OR ITS AR PRESENTATNE. t.'It► r T �, f F— Dw pY':r!� THE CONTRACTOM54iA4L DCTERMINE' THE EXACT LOCATION OF ALL E%ISTINO 0 L11155 OUORE CM AENCINO WORK ANDAU'RE ES 10 BE FULLY RESPONS1aLFOR 1f} I ANY AND ALL DAWJGES THAT INCUR DUE TO THE COUTRACTORS FAILURE YO LOCATE SS,, , ., ' i • L i �1�m0' FF%ACTLY AND PRESERVE ANr AHOA&L UHDEROROUNO UTII.ITiES. AHEL ASSUMES NO !•: .:• .� Po"UVAIA, LIABILITY FORTHELOCATION OF UNDERGROUND UTILITIES I � ' ! � _-'�" ' .. Jam,• tt LL1LIlN^Llc TOPOGRAPHIC NOTE LPLOJA rgtL r.l• r le[+++n+,n , 'k m �� f � �L F Tmr4u el4u Ip serloAnmcr�Tw. w • •. i �fi ��••, Y iAiV. -'71 %5 Bi 5MIPM UF'l11 1fi^ �,• µ J .�..-^ / .als rw+0 rrp, In cat, i'1 :arA.111n .wu VERTICAL DATUM CM Novo 29 cue+. =epJ; vr! , In �•CL1W. . I,,'rau110 MOO N CAW - BRASS NO l.1ARn: POINT NO.II�W143) IR IY]-T.'l ler[u•lF„ip'.-if lt'L1N�1 S.IOT AI CENTER N•1110161s E=1278351W till LFr•lUe.NeeAy ELEVATION: 3135 90 T- 1 p3 FOJNIIMW IN CAS` BASIS OF BEARING d" P.F'1 lu'npl:aY I 2" IPGN PIPE QTi B,R43, dry TLL_N. IN C014C -335' WAS "N STATE FLANECDORDINATE SYSTEM, NORTH 7KNE _ BELOVf GRADE HlT IOF NFEnLHAL WAY HOR2ONTAL CONTROL V•'V HOI DINGCOUNTY 140N'JMENT NL'MBCRS 1453 AND 1WI43 - __ .-D •TlMn11 Ni[ — as aim L we POINT NO RFW143) WM1lrn I, M. O E=12TB3B1 G3 — ti ra•- ATVJEYERHAUSERWAYSOUTH, SOUTH OF TRAFFIC ISLAND AT —0 — LI F.•:TaF-A LRi O VJESTEOUNOOFFpV3ON RAM25 TO SR IA-.T i_wLLblt;l,IMyNI lIC POINTN0.Ow. 21445.,) 1rllli�,174 N-110433C29CIF.e AT CENTERLINE OF \VEYERI IAUSLR N'AY SOUTH Knowwhat'Bbelow. AIINEBETVECNTHEWJOFOUNOM0I4UMENTSBERSN''11'22-E j.;_.,_- ..__ _ Cell before you dig. THE EXISTING CULTURAL AND TOPOGRAPHIC DATA SHOWN ON THESE DRAWINGS HAS BEEN PREPARED. IN PART, BASED UPON INFORMATION FURNISHED BY OTHERS WHILE THIS INFORMATION IS BELIEVED TO BE RELIABLE, AHBL CANNOT ENSURE ACCURACY AND THUS IS NOT RESPONSIBLE FOR THE ACCURACY OF THAT INFORMATION OR FOR ANY ERRORS OR OMISSIONS WHICH MAY HAVE BEEN INCORPORATED INTO THESE DRAWINGS AS A RESULT TRAFFIC CONTROL CONTRACTOR SHALL PROVIDE AND MAINTAIN TRAFFIC CONTROL THROUGHOUT THE PROJECT CONTRACTOR SHALL SUBMIT TRAFFIC CONTROL PLAN WITI I RIGHT-OF-WAY PERMIT APPLICATION - RIGHT OF WAY PERMIT CONTRACTOR SHALL SUBMIT ALL REQUIRED ITEMS, AND FEES, TO OBTAIN THE RIGHT OF WAY PERMIT PRIOR TO WORK RECORD DRAWINGS CONTRACTOR SHALL PROVIDE THE CITY OF FEDERAL WAY RECORD DRAWINGS AT THE END OF CONSTRUCTION, SHOWING ALL REVISIONS TO APPROVED PLANS. I PIES OF OTHER INSTALLATIONS THAT ARE NOT SHOWN ON THESE APPROVED CONSTRUCTED UNLESS AN APPROVED SET OF PLANS THAT MEET ALL CITY THE REQUIREMENTS OF KCRS CHAPTER B ARE SUBMITTED TO THE CITY OF LST THREE DAYS PRIOR TO CONSTRUCTION. SHALL BE KCAS OR NGVD-29L SHEET INDEX NUMBER TITLE C1.0 GOER SHEET C20 PAVING PLAN C2.1 PAVING PLAN C22 PAVING DETAILS C23 GATE DETAILS C3.0 I CHANNELIZATION PLAN C3.1 CHANNELIZATION PLAN C32 CHANNELIZATION DETAILS C4.0 GRADING PLAN C4.1 GRADING PLAN PERMIT NO.: 19-103472—EN _aL rl9 DATE LqO's m,rd kps w w ACOMA • SEATTLE SPOKANE • TRI-CRIES 215 Nodh 301h Sbeel, Suite 300. Ta.,n , VA 98403 533832422 TEL 253.283.2512i'M vJae.ahbl—WER Project 7ille. SOUTH 344TH WAY GRIND AND OVERLAY REF BLDG PERMIT 19-100792 PROCESS 1 LAND USE 19.100523 UP Cllenl: FEDERAL WAY PUBLIC SCHOOLS 33330 BTtI AVENUE SOUTH FEDERAL WAY, WA 99003 CASEY MOORE Pro ecl NO 218093OL10 issue Set 8 Dale PERMIT SET 612/2019 FVYRl f7LZ0,B Revisions Sheet 701e. COVER SHEET Desl uned Sv: Dawn hv. Chlok d by, WAT F199UBMIT4�b She., No AUG 02 2019 &-TW' PMENT 1 DI 10 Sheets SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. 3-1/2. 0 SCH 40 STEEL PIPE FULLY WELDED AND GROUND SMOOTH EQUAL WIDTH VARIES SEE PLAN FIELD VERIFY A' 1'•9' I COWL 4" REFLECTIVE TAPE (TYP ) EQUAL 1 I i PROVIDE FIRE DEPARTMENT APPROVED KI7DIC 1 PAD LOCK WITH GATE KEY AT EACH GATE. CONCRETE CURB 1 1 1 1 3 DRILL 1-1/2' 0 HOLE IN FLANGES � � I _ PROVIDE PERMANENT RIVETED WEATHERPROOF PLAQUE rJ `N O WITHIN 6" OR DRILL HOLE, ONE PER EACH SIDE, TYP. --» WITH THE FOLLOWING WORDING; ! �j I r~Y `~ STEEL PLATE. 7 I I FULLY WELD TO PIPE + I I I I y I WARNING: — _ __ I _----..1 I PATE DE5IGNED TO BE LOCKED OPEN OR CLOSED AT ALLTIMES I ELEVATION STEEL 1 + ENDCAP. FULL. 1 END CAP. FULLY WELD I TO PIPE 1 SEE PIPE GATE HINGE POST DETAIL e C2.3 a 1 1 I I I I I a ) I 1 9 P I o � I I I I � I NOTES. I 1. OAKI0 ALL WELDS SMOOTH. 1 2. ALL STEEL COLV1 ONEWTG TO BE GALVANIZED AFTER FABRICATION AND PAW,,TED µ'ITH 71VD COATS OF SHERWIN WILLAMS COAST GREY FAINT I I 3. CONTRACTOR SHALL PROmE (2) 1 r DLVJETER STEEL PITiSOPILLED a 1 4. PROVIDE REFLFCTFlHOLE TO E STICKERS ON ALL VERTICAL AAD HORIZONTAL GATE MEW ERS. BON FRONT AND BACK SQCf4 5- PROVIDE EACH VEHK3AMOATE WITH AKNOX PAD LOCK . COORDINATE KNOX BOX B4BTALLATIO4 RNA LOCAIK1 AEOUIREMENTS WITH FKLE DEPT AS NEEDED. '�---� 6, PROVIDE SHOP DRAWINGS FOR APPROVAL. ��• PLAN .Z DRILL 1-1/2' 0 _--_ HOLE IN FLANGES HASP ENLARGEMENT VEHICULAR -PIPE -GATE HOT rO SCALE j GALV STEEL PLATE E4iO CAP. FYILLY WELD TO PIPE r TEFLON DISC I/ GATE FRAME m Lit DRILL HOLE IN FLANGE TO ACCEPT 1-112" 0 STEEL PIN, WHERE GATE SWINGS TO HOLD OPEN POST J• STEEL PLATE. FULLY WELD TO PLATE II f- 4-112" 0 X 114" GALV STEEL PIPE r 3' LFINISH GRADE I CONCRETE FOOTING NOTES: 1. ALL STEEL COMPONENTS TO BE GALVANIZED AFTER n FABRICATION AND PAINTED WITH TWO COATS OF SHERWIN 1 WILLIAMS COAST GREY PAINT. 2. PROVIDE SHOP DRAWINGS FOR APPROVAL d PIPE GATE HOLD OPEN POST Know whays below. Call before you dig. 6-625' Q.D.S STEEL OUTER PIPE 5.583" O.D. XS STEEL INNER PIPE 91 I I � 1• � I I I I I #4 U SHAPED BARS I i �..- I I #3 U SHAPED BARS H 1 DI I I I L19d.3' CLEAR T�I NOTES: I I 1, ALLSTEEL GONP ONENTS msE GAt.MNOIED AFTER " I PROVIDE SQUARE FOOTING AS FABRICATION AND PAINTED WIVIR TWO COAT9 OF SHERWIN PAINT. l- - SHOWN ON PLAN BACK OF CURB Wd UTAMS COAST GWY 2. PROVIDE CiRGSE FITTINGS AT TOP AND SIDES OF GATE POST. 3. PROVIDE RUBBER SEAL AT BO7TOA4 OF OU1 ER PIPE. 4. GRIND VTE LC AT INNER PIPE SMOOTO AND FLUSH WITH FACE _ I OF INNER PIPE 5 PROVIDE TEFLON DISC AT 70P OF GATE SUPPORT POST. B PROVIDE SHOP DRAWINGS FOR APPROVAL h PIPE GATE HINGE POST !. NDT TD � ALE PERMIT NO.: 19-103472—EN I TI 21 2 AN !► a D 1COMA • SEATTLE SPOKANE • TRI-CITIES HS North 301h Street, Stu $A TiaYK4. WA 904D3 i3 °M2122 TEL 253.3032 F#4 x 9tlhLmm w[e "iLds, Two SOUTH 344TH WAY GRIND AND OVERLAY REF BLDG PERMIT 1g-100792 PROCESS 1 LAND USE 19 14DO523 UP Client: FEDERAL WAY PUBLIC SCHOOLS 33330 BTH AVENUE SOUTH FEDERAL WAY, NIA 9600 CASEY MOORE Pio'eer No. 2160930-1D ]}yyC Sol L Oas PERMIT SET BR12019 FLVRI 612R91B sneer rill, GATE DETAILS Oesl°eee or. D�ewn 6v: C,° �msx WAT RJS DCN Sheol No C2.3 5 0l 10 Sheets SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. SKIP CENTER LINE (SCL) tl � TJYPE 2YY BPA7� \-4" YELLOW LINE (TYP) SEE NOTE 6 DOUBLE YELLOW CENTER LINE (DYCL) 4" YELLOW LINE SEE NOTE 6 TYPE 2YY RPM WHITE EDGE LINE (WEL) —4" WHITE LINE YELLOW GE LINE(YEL) Hot / -0" YELLOW LINE SEE NOTE 6 N0,TYPE 2Y RPM (TYP) ) SEE NOTE 7 DIRECTION OF TRAFFIC BEifE7LL 7.QTE_S- LCNiCTTu01NAL �TRIpING WP 4RTERHLS SHALL BE PL1S11c TYP; B MET1mn�TNACRYLATE �AUM}, TRANSVEFS: I,MaKiNGS SHALL SE P[AS7LD f A AIL QTI13 S1RoINO --%W-k BE PNN' . 2• ALL STRIPINO WITHN 1!AZRSFCTi9hS SHALL 8E PIASTIC TYPO A OR D. A 1 LL FI BE7R [lit L BE �Ni! RTO $�OL 4, TTPF 2 4PM'S SN1:.L SE USED DINALL ANTERW5 AND ,c,UECIPRS. P STRPEO 5. WHERE T71'E C CURR 15 UaZD IS PLACE OF SIRIFING, USE BPM PAnERN AOPLICASLE TC 111E 5TAIPI4G REINO RpL4" EU. SPECIFR: NOI 6, IF ImmA 3 USED. MMA SHALL BE PROrIL.ED- 7. YMERE RA15E-D MEDIAN OR TYPE C CURBING IS 115ED, VIE TYPE 231T WW S. V6111 RED FACING QFIPCISlie THE GIRIE=N OF 1RAFPIC. e. 4IdStE 1W5E0 y!2UI1 OR TYPE C CVRWIIG IS USfO, VSE TTaE PWk RPM'S, WITH KID FACING O?POSTTE THE MECTIGN OE TRR M DOTTED EXTENSION LINE (WDEL, YDEL) 0 0 0\ rJ t� o MONO-QHiCOIiGNUL -V TTPE 2 LINL, YEII.OW OR WNITE PER V-DIRiInOW.L RPW 1YPE 2 PLANS. SEE NOTE 0 - DWG NO PUBuc RAISED PAVEMENT MARKERS 3-17 Ryl<s RAISED PAVEMENT MARKERS WIDE LINE (WL) NO PASS LINE (NPL) r-----20---I 6- WHITE LINE /-SEE NOTE 6 I _ E� � ZiL.tOW LmE SEE A TYPE 2Y RPM TYPE 211 NOTE 6 (3-17) DIRECTION OF THRU TRAFFIC DIRECTION PASSING IS PROHIBITED DOTI ED WIDE LINE (DWL) REVERSIBLE LANE LINE av YELLOW UNE I �4 7 I SEE NOTE 6 /�- O E �2'L--¢ �a" YD4rm LINE �1YPE 2W. FRvN SEE NDTE 2 SEE �� B CI�C}10N OF TRAFFIC il•PE 2W RPM S-�/ LANE LINE (LL) TWO-WAY LEFT TURN LINE (TWLTL) �-i TYPE 2W RPM LA- WHITE LINE (TYP) _ SEE NOTE 6 SEE NOTE 6 m--TYFE 2YY RP419 + 1'FU.OHI ITNE SEE N{YE fi DIRECTION OF TRAFFIC DIRECTION OF THRU TRAFFIC DROP LAhY LIVE (OLO O4F,T,QN OF VAFFI_ BARRIER LINE (BL) +--42' 3-� �D•^-„ 20- YEI LOW LINE 5if Nflr 6 TYPE 2YY RPMS TYPE 2W RPLL'S �5 6 E SfE V01E 8 E ITE 110�u �(�w ACb s DWG. NO. RAISED PAVEMENT MARKERS 3.18 NOTE: -DOUBLE YELLOW LINE AND LEFT TURN LANE -LINES SHALL BE PAINT ,. y rex,lerom-r,. w>a,=b x°Iwe� f116 Centerlina Cra9mllllli Stripe 1 Fr+INYw,FI+NMIq�O owr. v,u+L s �I �r�m.,,�.-'. �„c°,d Crosswalk �T9a� Lone Line Centerline J -awm Iriv Roadway to�,r °n•Ir inns nb WOK I Centerlina LEFT TURN LANE �N��°��I'� m° Curb Ramp c°-,Aci nla,°mro 4 I [Tyq.) 18" STOP LINE Iw w, ��.aslile CROSSWALK STRIPE DETAIL N w.,�r��—1 TWO-WAY LEFT TURN LANE TABLE I 1AM2 Poi I r FAME3 Iw • >, �°• •nm°,rw. 4,wn Ss� n ,a m• I)F ' ,.TL•C- Orvu. nu. PAVEMENT MARKING - TURN LANE 3-20 aHpT TO SCR' = PAVEMENT MARKING - TURN LANE 12-72D�� Know what's below. Call before you dig. TRAFFIC ARROWS TYPE IS, 2SL, 2SR, 35L, 3SR, 4S, AND SS - SEE WSDOT STANDARD PLAN M-24.40 "SHARKS TOOTH" YIELD LINE SYMBOL - SEE WSDOT STANDARD PLAN M-2460 HANDICAPPED PARKING STALL SYMBOL - SEE WSDOT STANDARD PLAN M-24.60 BIKE LANE SYMBOL - SEE WSDOT STANDARD PLAN M-9.51) PREFERENTIAL LANE SYMBOL - SEE WSDOT STANDARD PLAN M-7.50 AtFa'z*v%y °vTd , MISCELLANEOUS PAVEMENT MARKINGS e3-21V MISCELLANEOUS PAVEMENT MARKINGS 3 M17T ro S[ALE NOTE: CROSS WALK STRIPES AND STOP LINE SHALL BE WHITE THERMOPLASTIC PER WSDOT 9-34.3(1) Dauna YNowunle, aMpa DETAIL B s°e omo.c N w.A�'a Mre ynWNti•.v.�ll.p As.w,w lmAw END TWO-WAY LEFT TURN LANE DWG. NO. RAISED PAVEMENT MARKERS 3.19 PERMIT NO.: 19-103472—EN 1�aven DAT �1� WA om 0 COMA • SEATTLE - SPOKANE TRI-CITIES 15 North 301h Sam!, Suite 300, 1'� WA WyC 3.383.2172 TEL 253.3812572FAA M.-':h ote-1 T'I'� SOUTH 344TH WAY 3RIND AND OVERLAY REF. BLDG PERMIT 19 100792 PROCESS 1 LAND USE 19-100523 UP ;L!P-L FEDERAL WAY PUBLIC SCHOOLS 30330 8TH AVENUE SOUTH FEDERAL WAY, WA 90003 CASEY MOORE Pro = No. 21BO930 10 e 501 E_u4r. PERMIT SET 802019 • P I leV r7h'A7. IoIWr/�'� I —I Bf2230'9 R4�iLq.�r -••rei T111n CHANNELIZATION DETAILS �pJ' MCtl-b� Ore— Dv: QLee� WAT Pis DCN C 3.2 6 01 10 Shaela SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. CITY OF FEDERAL WAY EROSION/SEDIMENTATION CONTROL NOTES: 1 APPROVAL OF THIS EROSIONISEDIMENTATION CONTROL (ESC) PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (I E SIZE AND N LOCATION OF ROADS, PIPES, RESTRICTORS, CHANNELS, RETENTION FACILITIES, UTILITIES, ETC.). PAVING, UTILITIES AND OTHER EXISTING SITE 2 THE IMPLEMENTATION OF THESE ESC PLANSNiO THE CONSTRUCTION. pAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE ESC FACILITIES IS THE IMPROVEMENTS UNDERGROUND COMPON NTS AShINDICDATED BYING THIS DRAWING AND AS /J RESPONS8II.ITY OF THE APPLICANT/CONTRACTOR UNTIL ALL CONSTRLICTKJN IS APPROVED_ REOLIR:ER FOR NEW CONSTRUCTNN IT 15 THE / � GRAPHIC SCALE 3. THE BOUNDARIES OF THE CLFA M 1JMIT$8110W N ON THIS PLAN SHALL BE CLEARLY FLAGGED IN THE FIELD PRIOR TO CONSTRUCTION. DURING THE CONSTRUCTION CONTR4CTOR5 RESPONSMILITY TO FULLY REAMEATTHE SITE / 9�xd 0 15 30 60 PERIOD, NO DlSTURBRNCE BE.YONRTHEFLAGGER CLEARINO LIMITS SHALL BE PERMITTER. THE FLAGGING SHALL BE MAINTAINED BY THE APPLIC-ANTCONTRACTOR FOR CONDITIONS AND TO CORRELATE THESE OBSERVATION$ THE DURATION OF CONSTRUCTION. WITH THE PROJECT WORT( AND INCLUDE ALL NECESSARY h_ DEMOLITION, WHETHER SHOWN OR NOT, AND INCLUDE ALL -% 1'=30 FEET 4. THE ESC FACILITIES SHOWN! ONTHIS PLAN MUST BECONSYRUCTED IN CONJUNCTION WITH ALL CLEARING AND GRADING ACTIVITIES, AND IN SUCH A MANNER AS TO SUCH COSTS IN THE BASE BID. / INSURE THAT SEDIMENT LADEN WATER ROES NOT ENTER THE DRAINAGE SYSTEM OR VIOLATE APPLICABLE WATER STANDARDS 2 CLEARI(46:ITI5 THE INTENT OF THE WORK UNDER THIS 5. THE ESC FACILRlESSHOWN Dk TNIS PLJLd1ARE THE MINIMUM REDU IREMENTH FOR ANTICIPATED SITE CowTION5. O11FBNG THE WNSTI{UCTIONI PERIOD, THESE ESC CONTRACT TO CONOUCT ALL CLEARING NECESSARY TO BE FACILITIES SHALL BE UPGRADED (I.E. ADDITIONAL SUMPS, RELOCATION OF DTTCHESANDSILT FENCES, ETC) AS MEMO FOR UNEXPECTEI3 STORM EVENTS. ABLE TO COMPLETE ALL THE WORK OF THIS PROJECT. I :• r' y �fA(((-CCC��� 6. THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANTICONTRACTOR AND MAINTAINED AS NECESSARY TO ENSURE THEIR CONTINUED FUNCTIONING, 3. CONTRACTOR SHALL LEGALLY DISPOSE OF THE OWNERS PROPERTY, ALL DEMOLISHED AND REMOVED MATERIALS. 7 ANY AREA STRIPPED OF VEGETATION, INCLUDIS'a ROALTLVAY EMBANKMENTS, WHERE NO FURTHER WORK IS ANTICIPATED OR A PERIOD OF 2 QAYS (WET SEWN) OR 7 UNLESS INDICATED OTHERWISE DAYS (DRY SEASON). SHALL TLE IMMEDIATELY STABIL12EO WITH THEAPPROVED ESG METHODS (I.E. SEEDING, MULCJ-hNG. NETTING, EROSION BLANKETS, ETC-) 4. UTILITIES TO BE ABANDONED SHALL BE CAPPED / V 8. ANY AREA NEEDING ESC MEASURES, NOT REQUIRING IMMEDIATE ATTENTION, SHALL BE ADDRESSED WITHIN 15 DAYS- CONTRACTOR SHALL ASBUILT LOCATION. 9, THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN THE 24 HOURS FOLLOWING A STORM EVENT, 5- ALL MONUMENTS DTSTURBED AS A RESULT OF CONSTFWCYN)N ACTIVITIES SHALL BE REPLACED PER WAG 10. ATNOTLME SHALLMOR6THAN ONE FOOT OF SEDIMENT BE ALLOWEO TO ACCUMULATE WICONTRACTOR SHALL APPLY THIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE SPERMIT T POTHE OWNER HE CLEANED FRIGRTOPAVWG. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT -LADEN WATER INTO THE DOWNSTREAM SYSTEM. DEPARTMENT OF NATURAL RESOURCES FROM NECESSARY. I / 11. STABILIiiD ODNSiRUCTION BHTRJWCES AND WASH PADS SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE MIZE DUST GENERATION PROJECT- ADOTTIONAL MEASURES MAY 4F REOUIREFITP INSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT. 6. By SPRINKLIING THE SICONTRACTOR SHALL TIE (WITH WATER UNTIL SURFACE ISE / 12, WET SEASON REQUIREMENTS AS DESCRIBED IN APPENDIX D. SECTION D 2 42 OF THE KCSWDM ARE IN EFFECT BEGINNING OCTOBER 1 THROUGH APRIL 30, WET. SEE BMP C140. 13.AHY PERMANENT RETENTIONMETENTiON PACILTTY USFAASATEMPORARYSETTLING BASIN SHALL BE MOOIFIED WITH THE NECESSARY EfL 20.1 CONTROL MEI45UFIES 7, SAWCUT CONCRETE SIDEWALK AT THE NEAREST JOINT. AND .SHAI I PPOWDE ADE0UATE STORAGE CAPACITY, iF THE PERMANENT FACILITY IS TO FUNCTION UL7 A AT FLY AS AN INFILTRATION OR DI6PERSIOH 8YSTEkA THE FACILITY SHALL NOT BE USED AS A TEMPORARY SETTLING BASIN NO UNDERGROUND DETENTION TANKS OR VAULTS SWILL BE USED AS A TEMPORARY SETTLING BASIN- / 14. WHERE SEEGING FOR TEMPORARY EROSION CONTROL IS REOUMM, FAST GERMINATING GRASSES SHALL BE APPLIED AT AN APPROPRIATE RATE (I.E- ANNUAL OR PERENKIAL 0.7E APPLIED AT APPROXIMATELY 80 POUNDS PER ACR4 '"1'•"-� ' � L ADAPTOR SKIRT 15, WHERE STRAW MULCH FOR TEMPORARY EROSION CONTROL IS REQUIRED, IT SHALL BE APPLIED AT MINIMUM THICKNESS OF TWO INCHES, a� \• . /� / J ? 16. MANAGEMENT PRACTICES PROVIDING SIGNIFICANT TREE PROTECTION SHALL BE PROVIDED PER SECTION 19.120 OF FWRC- Y % ///•-(�¢ / - _ — /JJ GEOTEXTILE IFABRIC j DEMOLITION NOTES 1. DEMOLTTTON. IT IS THE INTENT OF THE W0,RK UNDER TYBS CONTRACT TO INCLUDE THE DEMOLTTION OF ALL EXISTING RETRIEVAL STRAP OVEITFLOW (TO PYPASS PEAK STORM VOLUMES) 2I`4' EXISTING I CATCH BASIN W .. �� • � ..-,�// � SEDIMENT ACCUMULATION I V NOS: TE a I 40 1. FILTERS SHALL BE INSPECTED AFTER EACH STORM EVENT AND =W 1 / C{F+AhTED OR REPLACED WHEN 1f3 FULL N w 111 / IP ' f 2. WJSTAL.L INL.gT PROTECTION I13 ALL IAEW STORM STRUCRES REFER TO SHEET C4.0 FOR I / THAT WILL DOLLECT STORMWAYER ASTHEY ARE RtSTALLED" II ` } ' GRADING IN THIS LOCATION G-0 d INLET PROTECTION / 1 NDT ro SCALE 1 ISN-l1,77 KEYNOTES LEGEND. R— GHT4x-WAY/PROPERTY LINE ADJUST MONUMENT CASE AND COVER -----= CENTERLINEiP fiIF, 5---- —SAWCUT LINE /MATCH EXISTING ASPHALT- SEAL JOINT WITH EMULSIFIEDap. • , f OASPHALT PER WSDOT SPED 9021(6). IP ® INEE7 PFLOTECTIDN� BIT J Ct / 3O EXISTING TREE TO BE REMOVED" ASPHALT PAVEMENT FULLOEPTH C2.1 L1 1•CO w t. pi" .k:• 1. - I - ❑ 4 pRtVEAVAY GATE. 1 ASPHALT GRINDS CZ1 1 STA1•G0 OD"I".. I I �•/yH! O5 ADJUST CATCH BASIN. _ CEMENT CONCRETE -STANDARD DUTY 1 2 G28 czz Ir P. 3 7 VC VERTICAL CUR C2.1 ) TR �•1T,35,O O6 ADJUST MANHOLE 2 IF, 5 S CG CONCRETE CURB AP818UTTER C22 2 O 7 ADJUST WATER VALVE BOX COORDINATE WITH LAKEHAVEN WATER DISTRICT, r 5 1-00' (LAIN) L•-. 1 ❑STA 1�3'4"1)(I O BUTT -JOINT- REFER TO DETAIL O21 BEGIN GRIND. REFER TO SHEET C4,0 FOR e 1 6:0VERLAY GRADING IN THIS LOCATION C4.0 PROTECTION OF STRUCTURES ADJUST ALL STORM DRAINAGEMANHOLES, CATCH BASINS, MONUMENTBOXESAND OTHER STRUCTURES NOTED IN THE PLANTO Fl9k. PAVEMENT GRADE AFTER O MNR AND OVERLAY, CONTRACTOR IS RESPONSIBLE FOR LOCATING ALL OTHER UTILITY APPURTENANCES IN THE AREA TO BE PAVED. REFER TO WSDOT 5-02,3(9). LINE TABLE CURVE TABLE LINEN DISTANCE BEARING CURVEN DELTA RADIUS I LENGTH I TANGENT L1 BO 00' S89° 02' 21"E Cl 45.59- 57' 150.00' 120A3' 6 167' L2 111.35' S89° 02' 53"E C2 45' S0' 3B" 450 00' 360 06' 190.29' L3 606,26' N44' 57' 21"E L4 1680.25' SB9' 12' 00"E PERMIT NO,: 19-103472-EN ¢¢V�� •IN d/faas - DnT vPC 'Agm D w 1COMA SEATTLE SPOKANE • TRI-CITIES N 5 NoAh 301h SIreel, SLlW 3D0. TBWfew, WA 98403 A,3632422TEL 2533632ST26tlf W-abl.—IIE" 4�IeeI idle SOUTH 344TH WAY GRIND AND OVERLAY REF. BLDG PERMIT 19-100792 PROCESS 1 LAND USE 19-100523 UP Cr•enl- FEDERAL WAY PUBLIC SCHOOLS 33330 STH AVENUE SOUTH FEDERAL WAY, WA 98003 CASEY MOORE vmr.rJ He 2180930.10 PERMIT SET 6122019 I FWR18122019 _ Re nclens• PAVING PLAN Des.eeee Or 2m— 'Y g-'jLye ou WAT RJS DCN C2.D 2 of 10 Sheel xorzJ: t. Ax OeMu4 q/r�1,,Et�C�IN-' Y SJf R- JOwr npim.L AW+ aL FADRIgI� 11P'ar aADwd PotFs. 515, 4101AF >� v['rAC AT aV1T- x 9�WA5 As 1v fvM .RYrv'!A A1G AT StCi p gr4P4 a.�¢ w+n I�»>r>ti v a♦• wa u.r r uTFD N [w a r 1 GMamM lD1A9 M d:4'.KNr vVIL RL lOGiFa SD AY TO Writ• Tlc grrL ar INS. CW no vY11FT, rwplml the � R 4 Ava.wrt m Trr Lvq DE tl�wrlp Re A .s,wrla 4. ML uAR[s, [oxvsTxD a T Y-CrCORS YYY E gW 1ME SmE-xAtR NT s IR[RIU.T. FrRAuM7gi >a TtU Pu[eSION JDINiS 5��EVNtl10M .frNr rAeISTW of JA" PK-1,CUR0 Jowl NE 11W ><IRJ'Ai NLL-DEPTH IRASp sta' d!B MtD AD4CEM SIOEW.MIt 6. EIPINSIQ4 JIaF! irN}t11K sNKl [oNNRu TD THE REWNRNEIRS OF AstY oll5t jM9rED Y 1tJ). 7. uoNOII M I— of MINI MD BmEwA N 7RE UM IlllYMm leMmYowrt NON�5F11� C.NIHIN THE YOEW.LI( SNALL H.1NE X1 F�9g1r.C-) Amrm cm) SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. �....�,_..i- .............. L } I 1 ----- owRnrox Jaxr SFE NOTES AT IE7i r E1C A BRDUMm I—N a• Ks. 1i�" sfTa ctrR) �� cunFA IDu�i-p��V,p�lk Y�'WA'Wf JDIM sR „D1O 5. Aw 1/4 Y-oeowE WNI( BDm J Lvavc SIDEWALK AND CURB JOINTS DING. NO. AND SIDEWALK FINISH 3-3 �I.BGS�r�.S Dan CURB DETAILS �[rww1� tri OPRipww �� NOTES: 1. EX S71NG CM REPL%ACEMENT L RED DIRE RLl & OF ASPHALT A YNNUM OF 12" FROU TACE OF OLM-M �F� r .� d V p uoRMns .i wE%iAUCEO ASFHALT OR CEMENT CONCRETE CURB IK PR.YATC FARNP:G AREA? ONLY yY�V_ �duv.r I it � L �WRUDED CEMENT CONCRETE CURB FOR USE R PU941C F"fT OF 1CAY "C CURS AND GUTTER REPLACEMENT M3�A NOFEs AND EXTRUDED CURB SIDEWALK AND CURB JOINTS ~` CURB DETAILS CURB & GUTTER REPLACEMENT Nor rtl sDALe Z Nor to SCALE 3 n.. ! srl f•uauC C.[Jlmn�rta.rn�. r...,.,., r.,.. .,.... ...—_- ........_. 3.6A l�s�-nSC9�C+�� �K�c° DRfVEWAY APPROACH r rw✓ r� •a w. w �.L •` v swan Hreuc CURB RAMP IN VERTICAL CURB I ro3-11ro Yr0AK5 DRIVEWAY APPROACH C� CURB RAMP TPOT T l SCALE �/ NOT Ttl SCF•LE a - Know what's below. Cal{ before you dig. r 3/0- EXPANSION i JOINT - T/27 RADIUS r err.av sm.o-n v Dws � rrs uvu[AJcurt[e a Z. q uDulnm T A aDTTR Y pEp.y UM+T.ry rw [aw:T us[ D[TUE NO ES: 1. FOR JOINTS AND SCORING. SEE FEDERAL WAY STANDARD FOR SIDEWALK SPACING, EXPANSION JOINTS, AND SCORE MARKS. 2. SEE DETAILS 3-6. 3-6A, k 3-7 FOR MINIMUM DEPTH OF CONCRETE THROUGH DRIVEWAY SECTIONS. 3 WCHECKED VIFTH HEN 54BALLA NOT FOOT STRAIGHTEDGE MMITHH AND 10 / SHALL NOT DEVIATE MORE THAN 1/8 INCH 4. CONCRETE SHALL BE CLASS 3000. WSOOT SPEC. 13-14- REV. MAR 2011 � " m SIDEWALK SECTION c SIDEWALK SECTION V NOT To SCALE PERMIT NO.: 19-103472—EN VED{y PATE O��r AN o. 0 ,COMA • SEA1aE - SPOKANE • TRI-CITIES MS M, th 301h Slreel, Sulle 300, Tama, WA 99403 B33E3 . TEL 253.3B32572FAx %wahhl.mm WEB h e,eu TIIm SOUTH 344TH WAY GRIND AND OVERLAY REF. 13LDG PERMIT 19-100792 PROCESS 1 LAND USE 19A00523 UP Cf1e Df: FEDERAL WAY PUBLIC SCHOOLS 33330 BTH AVENUE SOUTH FEDERAL WAY, WA 98003 CASEY MOORE Pro'ecl No. 2160931110 PERMIT SET B02019 s FA, m FWR1 g*M19 R±.amnc PAVING DETAILS Daiieeen b, D'A.0, I, CRLChE03z WAT RJS OCH C2r2 4 of 10 Sheels Land Use Approval ,Conditions: 1. In compliance with the CZAs, all uses shall be conducted only inside an entirely enclosed building (except for site access and parking). 2. The 67.42 foot wide easterly driveway on South 344th Way/Street designated for staff and school buses was designed to accommodate school bus turning in and out of the site. This driveway was approved by the Public Works Director in order for school buses to enter, maneuver, and leave the site without encroaching onto opposing traffic lanes, or mounting a curb. Due to the wider driveway width, pedestrian crossing will take longer. As such, the applicant shall design the sidewalk to minimize pedestrian crossing distance at the driveway. The sidewalk plan must be submitted, reviewed, and approved by the City prior to construction. The approved sidewalk plan must be constructed prior issuance of any Certificate of Occupancy, including a temporary occupancy permit. 3. The pavement evaluation for South 344th Way/Street prepared by the applicant's engineer indicated that the pavement section for South 344th Way/Street was designed with Structural Number of 3.96, and has degraded to 2.40 due to age and traffic load. With the anticipated traffic load generated by the school, the provided calculations determined the road is not structurally adequate, and it is likely that the existing pavement will fail. As such, prior to issuance of any Certificate of Occupancy, including a temporary occupancy permit, the applicant shall provide adequate pavement analysis, design, and construct any required improvements along South 344th Way/Street to accommodate and mitigate the proposed traffic loading. The pavement analysis and design must be reviewed and approved by the City. 4. Prior to issuance of any Certificate of Occupancy, including a temporary occupancy permit, the applicant shall install signage at the two driveways on South 344th Street informing and directing motorists of the family -vehicle load/unload entrance, and school buses and staff parking entrance. Additionally, the internal drive aisle connecting the two driveways shall be blocked off during drop-off and pick-up time to prevent family vehicles from using the school bus/staff driveway; thus, minimizing pedestrian/vehicle conflicts. 5. Per the TIA, the two schools will be staggered by 45 minutes, with Lake Grove Elementary starting at 8:35 A.M. and Wildwood Elementary starting at 9:20 A.M. The morning peak of the proposed school uses were adjusted and analyzed from 8:15 to 9:15 A.M. instead of the typical adjacent street AM peak hour period. Since this is the case, the proposed school uses on site shall not start before 8:35 A.M. and shall be staggered by 45 minutes between the two schools. 6. As identified in the TIA, Advisory School Zone Flashers on South 344th Street are needed to inform drivers of an advisory 20 mph school zone. The City of Federal Way will utilize King County to install the Advisory School Zone Flashers on South 344th Street. Prior to issuance of any Certificate of Occupancy, including a temporary occupancy permit, the applicant shall reimburse the City any associated costs for the installation of the Advisory School Zone Flashers. 7. Prior to opening the schools, the applicant shall develop and implement the TIA's recommended Transportation and Access Communication measure. For the first two weeks of school, the applicant shall implement access control personnel as recommended in the TIA to manage potential queuing onto South 344th Way. I 1 I I 0 Know whays below. Call wore you dig. SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. I A J C `rq, C'? / f - / F N . 0 RT LETURN /// LEFT TURN ARROW TYPI / SIA5a67-13,0.0"RT LEFT TURN ARROW TYPE 2SL / X, LEGENI N 1 GRAPHIC SCALE 0 15 30 60 1" = 30 FEET - RIG HL0F VAY2PR0PERTY LINE - CENTERLINE h'PE 2SL M17J0 2SR [PLA$TID}TRAFFIC N:Rp:YS ❑ PER WSDOT giANOJIRb PWi M•2L-6002• I PERMIT NO: 19-103472-EN �l9 Lq1: ffu ED -ACOMA • SEATTLE - SPOKANE • TRI-CITIES 2215 Noah 301h Simel, Suilc 300, Tawma, WA S0403 253383.2422 T2L 2530P325/2FAX —hb=NEB Prelcel lille SOUTH 344TH WAY GRIND AND OVERLAY REF ELDG PERMIT 19-100792 PROCESS 1 LAND USE 19-100523 UP Clieni FEDERAL WAY PUBLIC SCHOOLS 333306THAVENUE S0UTH FEDERAL WAY. WA 98003 CASEY MOCRE .,Igy No 2180930,10 Issue Sel ♦ e+lq PERMIT SET 6/zlzol9 Aj FINRIMJ2019 S1r.3F' .1 CHANNELIZATION PLAN 7erwngY 7r D-- ev CM1ecswO br WAT RJS DCN Sheer No, C3.0 6 0l 10 Sheels 2215 North 30th Street Suite 300 Tacoma, WA 98403 253.383.2422 TEL 253,383.2572 FAX Elementary School Number 24 Driveway Bus Vehicle Tracking DRAWN BY: WAT '1 X Ap 0'\ DATE: 7/17/2019 GRAPHIC SCALE 0 10 20 40 1" = 20 FEET JOB NO.: 2180930.10 RECEIVED JUL 19 2019 CITY OF Ay OM UNNITYFDEVELOPMENT CSK 01 TRAFFIC MANAGEMENT I NCORPO RATED AGOSTINO CONSTRUCTION INC GENERAL NOTES -TRAFFIC CONTROL It is the responsibility of the contractor performing work to install and maintain the traffic control devices as shown herein, as well as any such additional traffic control devices as may be required to ensure the safe movement of vehicular and pedestrian traffic through or around the closure area and provide maximum protection and safety to workers. All traffic control devices shall be kept in their proper position at all times and shall be repaired, replaced, or cleaned as necessary to preserve their appearance, continuity and capability. All traffic control devices shall conform to the latest accepted edition of the Manual on Uniform Traffic Control Devices ( M.U.T.C.D.). Any revisions to these drawings shall be approved in writing by the Engineer of Record and the Agency leaving jurisdiction. The Agency Traffic Engineering Division reserves the right to observe the traffic control operations and to make any necessary changes. Any directed changes shall supersede these plans and shall be implemented at the sole expense of the contractor. Contractor shall provide flagmen as necessary to give adequate warning to traffic or to the public of any dangerous conditions to be encountered. Contractor shall remove temporary traffic delineation, signage, and other devices when no longer required, and shall restore areas to original conditions. Contractor shall cover existing signs where they conflict with construction detours and signing. All open excavation or construction work shall be a minimum of 5' from any operating traffic lanes. Contractor shall post uneven pavement signs, and ramp vertical pavement offset of l inch or more with asphalt for smooth transition. The contractor shall provide for access to all adjacent properties during work hours. Construction operations shall be conducted in such a manner as to cause as little inconvenience as possible to abutting property owners/operators. All signs shall be reflectorized and standard size. The contractor shall provide for safe pedestrian access at all times. MINIMUM LANE CLOSURE TAPER LENGTH = L (FEET) LANE POSTED SPEED LIMIT (MPH) WIDTH (feet) 25 E30P22q5 45 50 55 60 65 7010 105 ]2E7O 450 500 550 - 11 115 165295 495 550 605 660 - 12 125 180 245 320 540 600 660 720 780 840 BUFFER DATA LONGITUDINAL BUFFER SPACE = B SPEED 25 30 35 40 45 50 55 60 65 70 (MPH) LENGTH 155 200 250 305 360 425 495 570 645 730 (fee[) TANSPORTABLE ATTENUATOR ROLL AHEAD DISTANCE = R HOST VEHICLE WEIGHT HOST VEHICLE WEIGHT 9,900 TO 22,000 lbs. > 22,000 Ibs. < 45 45 - 55 > 55 < 45 45-55 > 55 MPH MPH MPH MPH MPH MPH 100' 123' 172' 74' 100' 150' LEGEND ® WORK AREA I -TYPE-III BARRICADE W/ SIGN FLAGGER X - TYPE -II BARRICADE W/ SIGN (� FLASHING ARROW SIGN (FA5) ]I - ADA BARRICADE W/ SIGN P.o - UNIFORMED POLICE OFFICER • - CHANNELIZATION DEVICE - EXISTING SIGN - SIGN SIGN SPACING = X (1) FREEWAYS & 55/70 MPH 1500' +/ EXPRESSWAYS RURAL HIGHWAYS 60/65 MPH 800' +/- RURAL ROADS 45/55 MPH 500' +/- RURAL ROADS & URBAN 35/40 MPH 350' +/- ARTERIALS RURAL ROADS & URBAN ARTERIALS 25/30 MPH 200' +/- (2) RESIDENTIAL & BUSINESS DISTRICTS URBAN STREETS 25 MPH OR LESS 100' +/- (2) (1) ALL SPACING MAY BE ADJUSTED TO ACCOMMODATE INTERCHANGE RAMPS, AT -GRADE INTERSECTIONS AND DRIVEWAYS. (2) THIS SPACING MAY BE REDUCED IN URBAN AREAS TO FIT ROADWAY CONDITIONS. ADDRESS 5 344-FH WAY & WEYERHAEU5ER WAY 5 FEDERAL WAY, WA 95001 �I, Q MINIMUM SHOULDER TAPER LENGTH = L/3 (FEET) SHOULDER WIDTH (feet) POSTED SPEED LIMrr (MPH) 25 30 35 40 45 50 55�200 65 70 8 40 40 601901120 130 E 170 190 10 40 60 90 90 150 170 220 240 WORK AREA TRAFFIC CONTROL: 5 344TH WAY GRIND AND OVERLAY CONTACT: MIKE AG05TINO CONTACT: 206 458-8881 JOB NUMBER: 202635 PERMIT NUMBER: COVER SHEET SIZE: B DATE: 8/6/2019 TRAFFIC MANAGEMENT, INC California • Great Lakes • Pacific NorthwerTm PLAN#:49595 800.763.3999 www.trafficmanagement.com IN Traffic Control Services • Sales $ Rentals SCALE: N .T.5, Permits & Consulting Engineering •Training s PKEf ARED BY: VK i C31 # 785804 SPOTTER WITH RADIO COMMUNICATION F- r � r TMI CONTACT PERSON: Valeny Kotyay TCS CERT #: 008319 SPOTTER WITH RADIO COMMUNICATION 15 LEGEND ® - WORK AREA I - TYPE -III BARRICADE W/ SIGN - FLAGGER X - TYPE -II BARRICADE W/ SIGN - FLASHING ARROW SIGN (FAS) - ADA BARRICADE W/ SIGN P.o UNIFORMED POLICE OFFICER ■ - CHANNELIZATION DEVICE d EXISTING SIGN - SIGN APDKE55 5 344TH WAY & WEYERHAEU5ER WAY 5 FEDERAL WAY, WA 98001 ❑' 25' 50' 100' SCALE: 1 " = 50' 12' 5 344TH 5T [35 MPH PHASE: 1 W20-7a W20-4 W20-1 < E LANOAD i DHROAD E R RK AHEAD AHEAD FLAGGER WITH RADIO COMMUNICATION j�-2QD CHANNELIZATION DEVICE SPACING (feet) MPH TAPER TANGENT 50/70 40 80 35/45 30 60 25/30 20 40 WORK AREA TRAFFIC CONTROL: 5 344TH WAY GRIND CONTACT: MIKE AG05TI NO CONTACT: 206 458-8581 JOB NUMBER: 202655 PLAN#: 49395 PERMIT NUMBER: SHEET 2 OF 4 51ZE: B 5CALE:1"=50' DATE: 6/6/2019 PREPARED BY: VK AN D OVERLAY TRAFFIC MANAGEMENT, INC. California - Great lakes • Pacific Northwes� 800.763.3999 www. tr of f it: ma n a g ement.c om rim I N_ Trolfic Control Services Sales & Re ,als Permits & Consulting • Engineefing • Training C31 # 785804 40 W 20-1 ROAD WORK W3-4 AHEAD 200' NT5 BE T PREPARED TO STOP W20.7a 200' N 5 200' NT5 C cS� Q W N LL1 W n 1""!1'5POTTER TO A5515T WITH PEDESTRIAN TRAFFIC FLAGGER WITH RADIO COMMUNICATION W20-7a 200' LEGEND ® - WORK AREA I - TYPE -III BARRICADE W/ 51GN - FLAGGER 11 - TYPE -II BARRICADE W/ 51GN - FLASHING ARROW SIGN (FAS) - ADA BARRICADE W/ 51GN P.o - UNIFORMED POLICE OFFICER • - CHANNELIZATION DEVICE d - EXISTING 51GN - SIGN APPRE55 5 544TH WAY & WEYERHAEU5ER WAY 5 FEDERAL WAY, WA 95001 r 5EE BELOW 0' 25' 50' 100' SCALE: 1 " = 50' NOTIFY AFFECTED DU51NE55E5 ADOUT TEMPORARY DRIVEWAY CLOSURE SPOTTER WITH RADIO COMMUNICATION f PHASE: 1 NOTIFY AFFECTED DU51NE55ES ADOUT TEMPORARY DRIVEWAY CL05UKE CHANNELIZATION DEVICE SPACING (feet) MPH TAPER TANGENT 50/70 40 80 35/45 30 60 25/30 20 40 WORK AREA TRAFFIC CONTROL: 5 344TH WAY GRIND CONTACT: MIKE AG05TINO CONTACT: 206 458-8881 JOB NUMBER: 202635 PLAN#: 49395 PERMIT NUMBER: SHEET 1 OF 4 SIZE:5 5CALE:1"=50' DATE: 8/6/2019 PREPARED 5Y: VK AND OVERLAY TRAFFIC MANAGEMENT, INC. California • Great Lakes • Pacific Northwest 800.763.3999 ww w. t ra f f i c manag em ent.0 OM Tsafflc Control Services • Sales & Rentals Permits & Consulting - Engineering • Training C31 # 785804 SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. 1 L 1 YPE BSIG,N .,.• u STA 11-74.93, 412' RT LEFT TURN ARROW STA 11t91.90, 4.12' RT LEFT TURN ARROW �� 2• r C TYPE 2SL (PLASTIC) (TYP) R511.00 1 R499.00 l r � / v / %r IEFF11 TURNARROW R / NO PICK UP >'1\�• ,/ DROP OFF PARENT 7 CQ� JJJ' LOADING STA911480, 6.00'LT, 6 OURT SCHOOL BUS xa� UNLOADING BEGIN CURVE TWO WAY STAFF Q LEFTTURNLANESTRIPING ACCESS STA 818346, QOO'RT ACCESS — LEFT TURN ARROW TYPE A TYPE B �n 7YPEASIGN STA 14.80.73, 0.00' RT LEFTTURNARROW s Do L51'A O.W LF. 6.00' RT DM CURVE TWO WAY LEFT TURN LANESTRIPING _... SOUTH 344TH WAY / 30" X 30" TYPE III OR TYPE IV REFLECTIVE .n ^� SHEETING ON ALUMINUM SHEETING PER SIGNALL B SIGN SHALL HAVE BLACK TEXT IL A WHITE BACKGROUND - REFER TO DETAILS ABOVE FOR LAYOUT l \ Q Know whars below. Call before you dig. PERFORATED SQUARE STEEL SIGN POST (GALV) WITH ASSOCIATED MOUNTING HARDWARE CHAMFER — r FINISH GRADE sa min CLASS 3000 CEMENT CONCRETE &_!!jUIGN DETAILS 6.00 MATCHEXISTING'PING i 57A 14+9fi90, O.OD' RT `�+Tk ly*50.00, fi0d LT, 6 00' RT — — — LEFFTURN ARROW TURN LANE STRIPING BEGIN DOUBLE YELLOW TAPER END TWO WAY LEFT TURN LANE STRIPING STRIPING NOTE N GRAPHIC SCALE 0 15 30 s0 1' = 30 FEET 1 CONTRACTOR IS RESPONSIBLE FOR VERIFYING AND LAYING OUT ALL CHANNELIZATION WHICH SHALL BE APPROVED BY THE CITY )-111 INSPECTOR PRIOR TO INSTALLATION- 2. AND A PAVEMENTMARKINGSO NTH PER THE DETAILS PROVIDED ON SHEETON C3.2 AND AS NOTED ON THE PLANS. PROVIDE RPMS AS SHOWN ON C3.2 F C3.2 DETAILS. 3- PROVIDE TEMPORARY STRIPING PERM &993(1T)AS NECESSARY. A--� STRIPING SHALL BE PAINT WITH TYPE 2 14ij LEGEND: RIGHT-OF-W'AYIPROPERTY LINE CENTERLINE PE 2SL AND 2SR P--%STICI TI:A P1C MRDLY5 ❑ PER1W190RT STA*IOMD PLAN M•24AO.02. I PERMIT NO.: 19-103472—EN OA�f aO's :hp a Q ACOMA • SEATTLE • SPOKA14E - TRFCITIES 215 Nodh 301h SBeet, Swo=. Tacoma, WA 98403 153.3832422 TEE 253.38325TYIAX xxw.alulmm WEa LY4lmk rulb SOUTH 344TH WAY GRIND AND OVERLAY REF BLDG PERMIT I9-100792 PROCESS 1 LAND USE 19-100523 UP Glienl; FEDERAL WAY PUBLIC SCHOOLS 33330 9TH AVENUE SOUTH FEDERAL WAY, WA 9B003 GASSY MOORE P�E�- 11}b� EQCIAtiO- 2190930.10 I�cS�ss3a PERMIT SET 8212019 Q FWR1Aa 01$ CHANNELIZATION PLAN pgjpe.e " D .M e" Gh. cw an WAT RJS OCN Sheel No. C3.1 7 oI 10 Sheels SOUTH 344TH WAY GRIND AND OVERLAY mpj A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. �..� CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. LEGEND - - RIGHTOF-WAYI PROPERTY LINE � CENTERUNE 7ACOMA - SEATTLE • SPOKANE • TRI-CI71E5 I 123 PROPOSED MINOR CONTOUR 2215 301h S9elF Tx hWA 03 423 PROPOSED MAJOR CONTOUR 233t,,422TEL 2533y2ttm wJllmmVESr I^ 123.45SPOT ELEVATION �ILlePre.be., 7.0% 'I f- OR _-31 SLOPE -----------RIDGEORVALLEY SOUTH 344TH WAY '•,TR"fTID,N pAryTeL MATCH EXrB" TO TOP OF CURB GRIND AND OVERLAY EA: 2B?,7Gk (TYP3 1 57 FL FLOW LINE • ` PROCESS I LAND USI KE-100792 NOTEREFE 19-100523 UP rnaTGHExIST ��a '� � YS EG 9?251 ¢,VPI 1O MATCH EXISTING GRADE. Client. MATCHEXLyII ) 2 { FEDERAL WAY YC• 992.43a / O AD LE LANDING SLOPE SWILL NOT EXCEED 2.0% IN ANY nuLTcuexsTNG� s �m 2 PUBLIC SCHOOLS Rl:3S1.99e ,y SAWCUT ASPHALTAS REQUIRED FOR FORMING OF CURB AND WATCH EX18T94Li ��' JA MATCH ExiSTIN¢ O.dY 3 Cii.39Rm � EG: JB7-72x GUTTER. 33330 BTH AVENUE SOUTH MRTCN EXISTING G _ a�A DISTURBEOLANDSCAPING, PROVIDEOMIN. 3"WOOD EG- i921)7_� 1 A¢ TRAN51TK7rJ,8AHEL T FONG SKIRT •PA IRktC•.A OH IF CEFEOF1iALWAY,WA96003 C k6 SAT CwR,EN CiONCa E L H I 1CASEY MOORE (TYP 3 ; • •. QITYPI CD . FRVISHF.O 1VITr•I A BRiCFC VAYTERN.R WSW re,o.r ve {rYP f 3sl, L - 'Lp MATCH -IAL NG 1. THE EXISTING SITE SOILS REQUIRE PROPER COMPACTION Et339��t PRIOR TO PLACEMENT OF PAVING AND UTILITY 21809M 10 F!lrC 39T,g9. tA. ! j IMPROVEMENTS. pLrC. 331 4A RSATCII E%I'STpli{ 2. CONTRACTOR SHALL GRADE ALL AREAS TO PRECLUDE I: „+ S 16 0a_u TC-TM4?kH4V PONDING OF SURFACE WATER ENIST_ EG'39S 971 3. THESPOT ELEVATIONS q T11CATED ON THESE PLANS REPRESENTS THE DESCH EOP OF PAVEMENT UNLES S NOTED PERMIT SET RSAT[H ,cl$'TIi OTHERWISE. 4 AQARQUTES SHALL NOT CXCEEO 556 IN THE DIRECTION OF 9/212019 GHAPH,C SCALE TRAVEL UNLESS MANORAILS ARE PROVIDED. LANDJNQS AT NO MORE THAN 2%SHALL BE PROVIDED FOR EVERY 2 5 FEET OF 0 5 10 1.NTCN E%137rNG RISE CROSS SLOPE SHALL NOT EXCEED 2%. zG• 3vi A3! - 5 a OTHERWISE. TYPICAL ERW SERB HEIGHT IS SIX INCHES UNLESS NOTED I-= 5 FCET �,y��'4�•,L �� REFER TO CITY OF FEDERAL WAY STANDARD DETAIL FOR CURB RAMP 70.411 fi F NORTH CURB RAMP NA:39625STING t"PI L MATCHp9STINCI avov+or� 1 SCALE 1' • 5' I EG: 39G 25t- _ - - - EGt 395112t� 12% 13% RTISTOP .�¢ 5,0' o START/STOP .e'°.v STA.r . VERTICAL CURB 111 4 VERTICALGURB GRAPHIC SCALE T95,$7 - . 0 5 10 e�.__-.�._- - - MATCHEXISTING - - 5 0 � _ - - w I - 1" = S FEET ECi:30Q' - MATC.6H EXISTING ,ram r FL: 592.s8_ •-- MATCEG: 39683O 75 7.3 _..� EG: 3B6 Biz- 5.0' �� 6.7 ��_ , -_ �_ - _ _ _ I &a. . - • r 717AHSErlgH PANEL 4.5% Lg9d$1 �4!L 1.4 % �x as 595.78 1.6L6'-395.65 a i74 '. R50' MA:EXISTING � 0'' rs TC: 393.i St (TYP) I :J 34s�L MAnK EXISTING 1 &0 (TVP) n m i. EG: 3B5.74t TC/FL:39R7T. !IJrI, �fI • 39B11 _ 34584 •- .� 39fi.59 111 T 9MON PANEL TCIFL: 392 AT r^� n°H 1 MATCH EX15T3k6 30% S,A�¢ 14% 7.4X . - To EX15Tgw, T! MATCH EXISTING EG: 39864z - " • • -- n7% EG:39320t 1.4N. T4n:.� fL•i Ye EG: 395.61t tTl'PI T J TRANSITION PANEL - - yy, jg7pyp l 3M4 - - - y \ �r 3 1 (TYP) TO: 396.49z aE a0'(TYP) % y MATCFI EX15T94C4 0 t N' EG: 392.763 '� 39 'R ,' 1j n ep n �. 393 t� r i1� 14% 1.4% ") N MATCH EXESTING M1• _ VATCHEMSTiHG T,ygy S'�`Y T :1 -- _ __ �' � 4.5% ^� itATCH EXISTING 392.76k S•� N FL: 39599t _ - _ 2— Y� f =� ---a,�- 2.2'i EG: 394A4t N 14ATCH�x,sITN[E �_ ¢ — � "^ � � 1 _ A FL: 3B2.70t F p A�' 4�CfI EXISTING - -,- _ - - "' �� A MATCH EXtS7lNG 383N{ �' EG: 393.36i - -. 395.41 iGF1: 39570 TCIFL: ]B92] TC: 3B3.27t� Jl -1 '� 9 MATCH EXESTSeG� FL gT TU'GL. 39581 _- _,- �. _ __ Teu; 305.1 55f - -- -.2-1 � 343,32 -EG: 39594t j ram- FL; 3p5,01'- },PATCH EXISTING ✓ j ,• n•yp) I. �� AIATCIlF.X16'RI,IGJ - `{11,f-a1 EXISTING.GB ^R3pn OD ��(1Yp) - - - EG: 394.B7t FYrRi &2RO1S I;MATCH EXISTING 7 p9 CO. 395 B4t RIM: 385.37 - ~MATCH EXISTING PANEL?� ^ /,i _ •✓ ` EG: 384,791 TRANSITION PAL fleV.We!]. 1 `7� REFER TO CITY OF FEDERAL WAY e GRAPHIC SCALE (P�1 STANDARD DETAIL FOR DRIVEWAY. C2.2 5bnnr T.Ile 0 5 10 EG:394EXISTING DRIVEWAY NUMBER 1 EG: 393,43t 1' = 5 FEET EDARD R TO CITY OFFEDERAL WAY eGRADING PLAN DETAIL FOR CURB RAEAP. C2.2 1 21 SOUTH CURB RAMP ❑ O r�.+nee yx Dra n b, CbIEIII WAT RJS DCN r PERMIT NO.: 19-103472—EN J7.J�.< _C4.0 lzw Know what's below. or---�—� e el ,o meet] Call before you dlg. SOUTH 344TH WAY GRIND AND OVERLAY A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. STA:13+09.73. 125-5.`LT PIPE GATE HOLD OPEN POST_• STA 12+86.06, 114 67'LT PIPE GATE HOLD OPEN POST. STA:13+15.28, 112.1VLT J ` PIPE HINGE GATE POST(2) � GRAPHIC SCALE STA:12+90 29, 101 lBLTI l+ 29• 1 REFER TO SHEET C4.0 FOR e 0 15 30 50 PIPE HINGE GATE POST GRADING IN THIS LOCATION C4.1 1- 30 FEET > - _ SIL 1, . STA.11 •,76 38. 80.9B'LT PIPE GATE HOLD OPEN POST f I SiA:11.23.7T, 61.82'LT ,1 2 PIPE HINGE GATE POST REFER SHEET A FOR GRADINGG LOCATION IN THIS LOCATION C4.0 MA. 10.8A50. 41AWLr •� �� - I - -\ I _ PIPE GATE HOLD OPEN POST- J`-fr--VC In srAilo•aB.94.a1srLT� � cG .. IB• S fP------15•BO• - is rnoo PIPE HINGE GATE POST 1P 5 - r --I._ - - --^ I' - l - - - 'I - - -I- .. .. .. AA V�•. gyve. l ip I - . •. .• - rp srAl2L5lJ3Y( - - - _ STA 18.51.00 ENO GR1ND80VE0 Y SOUTH 344TH WAY 1 � / �5TA 9.3803 = '� LINE TABLE CURVE TABLE LINE q DISTANCE BEARING CURVE N DELTA RADIUS LENGTH TANGENT L1 80.00' S89° 02' 21"E C7 45° 59' S7" 150.00' 120.43' 63 67' L2 111 35' SB9° 02' 53"E C2 45- 50' 30" 450 00' 360 O6' 190 29' L3 606 26' N44° 57' 21"E L4 1680 25- SB9° 12' 00"E TACK OR SEAL JOINT • /// r�� EXISTING SIDEWALK / l 1"GRIND EXISTING ASPHALT! 3' SEE PLANS FOR f 7- TT ` i' �x` ,^1 � , 11 PAVEMENT GRINDING LIMITS EXISTING CURB O Zo \� EDGE PLANING DETAIL AN AT ALL L W POINTS ryy77 Tp SC dLC -7ff AND AT ALL LOW POINTS TO PROVIDE ADEQUATE DRAINAGE •YY,h 1. 1 THROUGH CURBS OR LANDSCAPE 812' PLANTER ISLANDS. PIPE TO BE BEVELED TO MATCH FACE OF CURB ,11,1 Y WITH 3' HMA 1' R FOMSH GROUND GRADE CL 112 PG SBH-22. 1f TACK OR SEAL JOINT - PAVEMENT 6 � / ` - 1'4 - NOTE EXISTING ASPHALT) 3• J L 1 I Y CONSTRUCTION SHALL GRIND EXISTING PAVEMENT TO J CONFORM TO WSDOT PROVIDE ASMOOTH TRANSITION TOP OF CURB SPEC. 8-04.3 AT BUT JOINT ATAPPROACH WW4" VERTICAL CURB 3 NOT TO SCALE i_ HMA CLY", PG 58H-22 PER WSDOT 9-03 8(6) AND 9-02.1(4) r ;,, CRUSHED SURFACING BASE COURSE PER WSDOT 9-03.9(3) GRANULAR SUBBASE SUBGRADE O Know what's below. FULL DEPTH ASPHALT � NorrGscALE Call before you dig. &h7-JOINT DETAIL LE WIC KEYNOTES O ADJUST MONUMENT CASE AND COVER O2 MATCH E7DST0S6 ASP1iAT• SEAL JOINT WITH EMULSIFIED ASPHALT Prr.RWWWOPEM 9.02.1(6). OEXISTING TREE TO BE REMOVED. O DRIVEWAY GATE ci.a cz.a [�j OADJUST CATCH BASIN. O ADJUST MANHOLE, O7 ADJUST WATER VALVE BOX COORDINATE WITH LAKEHAVEN WATERDISTRICT. OB BUTT -JOINT REFER TO OETRIL. NOMINALLY) LEGEND: ... - RIGHT�OF•WAWlPROPERTYLINE -- --- - - -- - CENTERLINE SL- - - - - - - - - - - SAWCUT LINE Ip ® INLET PROTECTION cz.a ASPHALT PAVEMENT FULL EW-- 2 T) C2.1 ASPHALT GRIND &OVE. C2.7 1 CEMENT CONCRETE - STANDARD OUTY 1 4 C2.2 C2.2 VC VERTICAL CURB C2.1 e CG CONCRETE CURBAND GUTTER C2.2 GRIND EXISTING AC PAVEMENT OVERLAY WITH 3" HMA 1" DEPTH MINIMUM CL 1/2 PG 58H-22. REFER TO EDGE 4 PLANING DETAIL (TYP) C2.1 EXISTING AC PAVEMENT EXISTING BASE MATERIAL PREPARE SURFACE PER WSDOT 5.04 3(4) PROTECT EXISTING CONCRETE PRIOR TO PAVING. CURB IN PLACE(TYP) NOTES: 1. GR1NDRO IPLANING) EXISTING.A5PIAALT SHALL BE PER WSDOT 5-04.3(14) 2 HIRAPLA.CEMENT SHALL CONFORM TO WSDOT 5-04- 3. PROVIDE HMA MIX DESIGN TO CITY OF FEDERAL WAY FOR APPROVAL TYPICECTI AL SON Nor ra sCALE PERMIT NO.: 19-103472-EN 0 r� PATE rls r; Q 4COMA • SEATTLE • SPOKANE - TRI-CITIES 215 Norlh 301h Slreel, SuAc 308. Terolna, WA 98403 523832422 TEL 253.3E3MIA n211lmm wee a,_ Tllle SOUTH 344TH WAY GRIND AND OVERLAY REF BLDG PERMIT 19-100792 PROCESS 1 LAND USE 19-100523 UP rC le^l' FEDERAL WAY PUBLIC SCHOOLS 33330 BTH AVENUE SOUTH FEDERAL WAY. WA 98003 CASEY MOORE Proiecl No 2180930.10 Sel a Dale PERMIT SET 8i2,2019 FVYR7 9LOIB iM •l.mns. Sneei Tilie PAVING PLAN 0.41.mpu ha. Drawn by, Cp� WAT RJS DCN Sher No C2.1 3 01 10 She. SOUTH 344TH WAY GRIND AND OVERLAY AM A PORTION OF THE NW 1/4 OF THE SW 1/4 OF SEC. 22, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, PIERCE COUNTY, WASHINGTON. MATCH EXISTING - > _ EG: 39623t - i 0 2.0' 4 TACOMA - SEATTLE • SPOKANE • TRI-CITIES 2215 NI 3001 Slreel, Suile 300, Tacoma, WA 96403 MATCH EXISTING 0-��-- 253.3832472 hi 253 393152 fA1 wrw a161 com vrFa EG: 39S.J7t _ r• r 39tiXa � s9aA6. ;: � ¢v SOUTH 344TH WAY 70! s '` _ ' GRIND AND OVERLAY ` r0 REF. BLDG PERMIT 19-100792 PROCESS 1 LAND USE 19-100523 UP BEx16TING CB .f h h '1 MAS RIN:3o.15 �,' ,\ _ _,UT• -- •• " — FEDERAL WAY PUBLIC SCHOOLS 7 •-n' l 33330 BTH AVENUE SOUTH ,�Lrl CENTER:.TA:13+52.21,E1.99LT �� "+ -1 J _ • FEDERAL WAY. WA9B003 STA:13+32.19, 51.09'LT _ ypYr MATCH EXISTING MATCH EXISTING CASEY MOORE EG: 396.531 MATCH EXISTING CURB f\ � - ` —� i (�} EG: 398 671 � START 6' VERTICALCURB 3079T Hrorrcl-Ha \^,' �•3 MATCH EXISTING EG 396.29t 218093010 • RYi%L�j\ - i TRANSITION PANEL 1 L 39755 77 I ' PC:STA:13+52.30,S1.k9'L[ _ 4� - MGAIr.H: UBSTING PERMIT SET • _ Y I PT- STA:12+96 41, 50 59'LT / / J 5�7.52 y- S� -' 8/2J2019 MATCH EG: 3�%n11 \� r� / Fi20� ' �397-0 SC Is97, -. -iC: �i7.99. T- " '.� fFL: S97MTCNE%�7 r 45� f aaa��397,49i r MATCHEXISTING CURB ,I ;i67.50 11f I' r LL' 6 )�!' - VERTICAL CURB .. ;v1 1 y`I'_ . , EG�397 EXISTING TING � $ USE RPM. OR PAINT 192 EDGE PAVEDSURPACE •A0 - 5G �MATCH EXISTING w r fr" r •.` } / J ARM NOYSLANO EG: 397.441 v P. 2' DETECTABLE 1. - Yf ff f % \ `CENTER: STA:12,IIAO, 54,55'LT + / ~ , WARNING M ' b' -� _ r 1? - •'(G - 397-11 &/pF/)pA TWL. 39696 m�rr1��1iT'i ,!�� 398 �/ '71C1d CURS PAI• 1 . - „ir.� X :. 396 25 USE RIMS OR NT J GE PAVED a'l1RFA /PC: STA:12*61,18, 3057'LT ._S 010' ` {1VPS / r�<flr y 3Yi 7E •�.39624 1 M1s+ TC,FL• 396.04 >, _ GRAPHIC SCALE TXISIINGCB C 5 1n RIM: 39565 / 39569 _ h0! f ' KEYNOTES AA . JA fj~ MATCH EXISTING GRADE oS 395 71 ,LLLlll '�' �89571 t '1� \'-p150 2 / O AD DLEVELIRECTION, LANDING. SLOPE SHALL NOT EXCEED 2 0O1,a IN ANY LEGEND _ / START G" DIRECTION, fl1Ri1 SlajdM1lL VERTCCAL CURB f.�rF 3y,;>' O SAWCUT ASPHALT AS REQUIRED FOR FORMING OF CURB AND -- RIGHT-0E-THAN/PROPERTY LINE MATCH UD4TIi 3 —� / •? • ER 395.783 t �:' F �' _ /� RESTORE DISTURBED LANDSCAPING. PROVIDED MIN.3' WOOD CENTERLINE TRANSIROI rANEE p ry<- L'J CNlPS TC7il F.%I SIN P0.1R jRR1GA IF ESSARY. 123 PROPOSED MINOR CONTOUR (TYP) ILL EW Q e iT{ C COn WITIi L T c�1 Y+i re C �yF1� DOLOR FO�NSHW wRH ABRIGK PATTERN, 123 PROPOSED MAJOR CONTOUR r—CfM: 395 29 A -123 45 SPOT ELEVATION 'qG r MATCHr7uBT1NG 'ate f .-- " f M 1 .0% OR 3.11 SLOPE GRADING PLAN EG: 395613 + -� 1. THE EXISTING SITE SOILS REQUIRE PROPER COMPACTION -- ---- r+• TC'] Tr1FL 395.16 PRIOR TO PLACEMENT OF PAVING AND UTILITY — — — — - - RIDGE OR VALLEY FL: 3Y5-0f�� IMPROVEMENTS ` TC TOP OF CURB •HATCH E%I.STERCI , f 2 CONTRACTOR SHALL GRADE ALL AREAS TO PRECLUDE TC: 395 41t _ fX- FL FLOW LINE OF SURFACE WATER MATCH EXIISiING .�- y0 uqg',p,eoe e.; Dr— bv: Cneeled Er: FL: 36491R �•- \_il ITYPI 3. THE SPOT' ELH/AI IONS INMCATE DON THrBE PLANS N,'AT RJS DCN REPRESENTS' THE DESIDNTOP 9F PAVEMCNT UNLESS NOTED rJ IAwTCHExIsrING OTHERWISE. PERMIT NO.: 19-103472—EN MAT E%lSTi74G EG: 3941 EG: 39460t 4. TRAROVTBSSHHAIO IEXCEEDLSARE OVIDHE pLM.DPW$FAP Sneol No TRAViQ UNLESS HAIfORAILYARE PrrZl5V1DEO. LAHQINGS Al NO CRI01� MORE THAN �BNALI.I PF IDEp FOR EVERY 2.6 FEET OF /•�, ■ 1 RISE. CROSS SLOPE SHALL NOT EXCEED 2% gppRDVEb ice/_ ,I DRIVEWAY NUMBER 2 5 TYPICAL C OTHERWIS fB HEIGHT IS SIX INCHES UNLESS NOTED '/ OTHERWISE. Knowwhatrsbelow. ' eraLc-1'=5' PgiE 0 01 10 sneak Call before you dig.: I 1 1 I J W/0 I hereby state that this Technical Information Report for the South 344th Way Grind and Overlay project was prepared by me or under my supervision, and meets the standard of care and expertise that is usual and customary in this community for professional engineers. I understand that the City of Federal Way does not and will not assume liability for the sufficiency, suitability, or performance of drainage facilities prepared by me. Technical Information Report PREPARED FOR: Federal Way Public Schools 33330 8th Avenue South Federal Way, WA 98003 PROJECT: South 3441h Way Grind and Overlay 2180930.10 PREPARED BY. William Thompson, EIT Project Engineer REVIEWED BY. - David C. Nason, PE Associate Principal DATE: July 2019 Table of Contents Section Page 1.0 Project Overview.........................................................................................................................1-1 1.1 Purpose and Scope ....................... ...................... .................... .................... .................... 1-1 1.2 Existing Conditions ................................. .................. .............. .......................... I ............... 1-1 1.3 Post -Development Conditions.......................................................................... ........1-1 Section 1.0 Figures i Figure 1-1......... TIR Worksheet Figure 1-2......... Site Location Map _. Figure 1-3......... Existing Basin Map Figure 1-4 ......... Developed Basin Map Figure 1-5......... Table A 2.0 Conditions and Requirements Summary.................................................................................2-1 2.1 Core Requirements..........................................................................................................2-1 2.1.1 CR 1 - Discharge at the Natural Location........................................................... 2-1 2.1.2 CR 2 - Offsite Analysis............................................................................------...... 2-1 2.1.3 CR 3 - Flow Control............................................................................................ 2-1 2.1.4 CR 4 - Conveyance System................................................................................ 2-1 2.1.5 CR 5 - Erosion and Sediment Control.................................................................2-1 2.1.6 CR 6 - Maintenance and Operations.............................2-1 - 2.1.7 CR 7 - Financial Guarantees and Liability .......................................................... 2-1 2.1.8 CR 8 - Water Quality........................................................................................... 2-1 - 2.1.9 CR 9 — Flow Control Best Management Practices (BMPs)............................ .... 2-2 2.2 Special Requirements......................................................................................................2-2 2.2.1 SR 1 - Other Adopted Area -Specific Requirements ........................................... 2-2 2.2.2 SR 2 - Floodplain/Floodway Delineation.............................................................2-2 2.2.3 SR 3 - Flood Protection Facilities .............................................. .......................... 2-2 ..................................................................................... • 2.2.4 SR 4 - Source Control ..•. 2-2 2.2.5 SR 5 - Oil Control................................................................................................ 2-2 Section 2.0 Figures Figure 2-1......... Flood Insurance Rate Map Technical Information Report Grind and Overlay 2180930.10 3.0 Offsite Analysis...........................................................................................................................3-1 4.0 Flow Control and Water Quality Facilities Analysis and Design...........................................4-1 4.1 Flow Control.....................................................................................................................4-1 4.1.1 Existing Site Hydrology (Part A)..........................................................................4-1 4.1.2 Post Development Site Hydrology (Part B).........................................................4-1 4.1.3 Performance Standards (Part C)........................................................................4-1 4.1.4 Flow Control System (Part D).............................................................................4-1 4.1.4.1 Water Quality System (Part E)............................................................................4-1 5.0 Conveyance System Analysis and Design...............................................................................5-1 6.0 Special Reports and Studies ................................... .................................................................. 6-1 7.0 Other Permits..............................................................................................................................7-1 8.0 CSWPPP Analysis and Design..................................................................................................8-1 8.1 ESC Plan Analysis and Design (Part A).......................................................................... 8-1 8.1.1 ESC Maintenance............................................................................................... 8-2 8.1.2 ESC Supervisor 8.1.3 Documentation . .................................................................................._................8-2 . 8-2 8.1.4 Review Timing..................................................................................................... 8-2 8.2 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design (Part B)....................8-2 8.2.1 Pollution and Spill Prevention Source Controls and BMPs................................8-3 8.2.2 Responsible Personnel and Contact Information................................................8-4 8.2.3 Pollution and Spill Prevention Worksheets......................................................... 8-4 8.2.4 Disposal Methods................................................................................................8-5 Section 8.0 Figures Figure 8-1 ......... ESC Maintenance Report - Figure 8-2......... CSWPP Forms Figure 8-3 ......... Pollution Prevention Inspection Reports, Spill Prevention Monitoring, and Spill Incident Reports 9.0 Bond Quantities, Facilities Summaries, and Declarations of Covenant .................................. 10.0 Operations and Maintenance Plan ......................... ............ ..................................................... 10-1 11.0 Conclusion.................................................................................................................................11-1 j Technical Information Report Grind and Overlay 2180930.10 (0000 I J J J Section 1 Project Overview Technical Information Report Grind and Overlay 2180930.10 1010M13 J I J 1.0 Project Overview 1.1 Purpose and Scope This report accompanies the civil engineering plans and documents for the South 344th Way Grind and Overlay project, which proposes to grind and overlay a section of S 3441h Way between Weyerhaeuser Way S and just west of 38th Ave S. This project is associated with the Elementary School No. 24 (Devey) project located at 3600 South 344th Way in Federal Inlay, Washington (Parcel No. 7261200221). This project is a portion of Section 22, Township 21 N, Range 4 E of the Willamette Meridian. Refer to Figure 1-1 for the TIR Worksheet and Figure 1-2 for a Site Location Map. The site is located in Federal Way, Washington and is subject to the requirements of the 2016 King County Surface Water Design Manual (KCSWDM). 1.2 Existing Conditions The project site is entirely developed with a road, curb ramps and driveways. The topography of the road varies, but generally slopes from northeast to southwest with an overall elevation difference of ±21 feet (from 413 to 392). All sides of the road are developed with commercial buildings and parking lots. Currently, stormwater sheet flows to the curb and gutter located on either side of S 344'h Way and is conveyed to one of the many catch basins located in the right- of-way. Refer to Figure 1-3 for the Existing Basin Map. 1.3 Post -Development Conditions This project proposes to grind and overlay a 0.3 mile section of South 344th Way, replace both curb ramps on the corner of South 3441h Way and Weyerhaeuser Way South, and replace both driveway entrances to the Elementary No. 24 (Devey) site. Refer to Figure 1-4 for a detailed area breakdown (Table A). The grind and overlay portion of this project, which is the majority of the project, will not expose the existing base course and is for maintenance purposes only and therefore is considered neither new nor replaced hard surface. Existing drainage patterns will be preserved and the existing conveyance system will be utilized to collect and convey all stormwater runoff. Refer to Figure 1-4 for the Developed Basin Map. Technical Information Report Grind and Overlay 2180930.10 in 10MI30 I J. I Section 1.0 Figures Figure 1-1......... TIR Worksheet Figure 1-2......... Site Location Map Figure 1-3......... Existing Basin Map Figure 1-4 ......... Developed Basin Map Figure 1-5......... Table A Technical Information Report Grind and Overlay 2180930.10 (010013 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Project Owner Federal Way Public Schools Phone (253) 945-5957 Address 3350 8th Avenue South Federal Way, WA 98003 Project Engineer David Nason Company AHBL, Inc. Phone (253) 383-2422 Part 3 TYPE OF PERMIT APPLICATION 0 Landuse Services Subdivison / Short Subd ® Building Services M/F / Commerical / SFR ❑ Clearing and Grading 0 Right -of -Way Use ❑ Other_ _ _ / UPD Part 5 PLAN AND REPORT INFORMATION Technical Information Report Type of Drainage Review Full / Targeted / (circle): Large Site Date (include revision dates): Date of Final: Part 2 PROJECT LOCATION AND DESCRIPTION Project Name S 344th Way Grind and Overlay DDES Permit # Location Township 21 N Range 4 E Section 22 Site Address 3600 South 344th Wad — Federal Way, WA 98001 Part 4 OTHER REVIEWS AND PERMITS ❑ DFW HPA ❑ Shoreline ❑ COE 404 Management ❑ DOE Dam Safety ❑ Structural Rockery/Vault/ ❑ FEMA Floodplain ❑ ESA Section 7 ❑ COE Wetlands ❑ Other Site Improvement Plan (Engr. Plans) Type (circle one): Full / Modified / Small Site Date (include revision dates): Date of Final: I Part 6 ADJUSTMENT APPROVALS Type (circle one): Standard / Complex / Preapplication / Experimental / Blanket Description: (include conditions in TIR Section 2) Date of Approval: 2005 Surface Water Design Manual 1 111105 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes No Describe: _. Start Date: Completion Date: Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan : N/A Special District Overlays: Drainage Basin: Hylebos Creek Stormwater Requirements: N/A IPart 9 ONSITE AND ADJACENT SENSITIVE AREAS ❑ River/Stream ❑ Lake ❑ Wetlands ❑ Closed Depression ❑ Floodplain ❑ Other. I Part 10 SOILS Soil Type Slopes N/A N/A ❑ High Groundwater Table (within 5 feet) ❑ Other LJ Additional Sheets Attached 2005 Surface Water Design Manual oil ❑ Steep Slope ❑ Erosion Hazard ❑ Landslide Hazard _ ❑ Coal Mine Hazard _ ❑ Seismic Hazard _ ❑ Habitat Protection _ Li ❑ Sole Source Aquifer ❑ Seeps/Springs Erosion Potential 1/1/05 I J KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE ❑ Core 2 — Offsite Analysis ❑ Sensitive/Critical Areas _. ❑ SEPA ❑ Other ❑ Additional Sheets Attached LIMITATION / SITE CONSTRAINT Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area Threshold Discharge Area: name or description) Core Requirements (all 8 apply) Discharge at Natural Location Number of Natural Discharge Locations: 1 Offsite Analysis Level: 1 / 2 / 3 NIA dated:_ Flow Control Level: 1 / 2 / 3 or Exemption Number Basic Exemption Incl. facility summary sheet Small Site BMPs N/A Conveyance System Spill containment located at: N/A Erosion and Sediment Control ESC Site Supervisor: TBD Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private / ublic If Private. Maintenance L e uired: Yes / No Financial Guarantees and Provided: Yes No Liability Water Quality Type: Basic / Sens. Lake / Enhanced Basicm / Bog (include facility summary sheet) or Exemption No. 1 Landscape Management Plan: Yes No Special Requirements (as applicable_) _ Area Specific Drainage Type: CDA / SDO / MDP / BP / LMP / Shared Fac. 'None Requirements Name: Flood plain/Floodway Delineation Type: Major / Minor / Exemption / Norge 100-year Base Flood Elevation (or range): Flood Protection Facilities Source Control (comm./industrial landuse) Describe: None Describe landuse: Road, curb ramps and driveways Describe any structural controls: 2005 Surface Water Design Manual 3 1/1/05 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL I j j TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Oil Control Other Drai Describe: e Structures High -use Site: Yes No Treatment BMP: _ Maintenance Agreement: Yes No with whom? Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION x❑ Clearing Limits 0 Stabilize Exposed Surfaces 0 Cover Measures 0 Remove and Restore Temporary ESC Facilities 0 Perimeter Protection 0 Clean and Remove All Silt and Debris Ensure 0 Traffic Area Stabilization Operation of Permanent Facilities 0 x❑ Flag Limits of SAO and open space Sediment Retention preservation preservation areas 0 Surface Water Control 0 Dust Control 0 Construction Sequence Part 14 STORMWATER FACILITY DESCRIPTIONS Note: Include Facility Sy mary and Sketch Flow Control Type/Description Water Quality Type/Description ❑ Detention ❑ Infiltration ❑ Regional Facility ❑ Shared Facility ❑ Small Site BMPs ❑ Other ❑ Biofiltration ❑ Wetpool ❑ Media Filtration ❑ Oil Control ❑ Spill Control ❑ Small Site BMPs ❑ Other 2005 Surface Water Design Manual 4 111105 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTS/TRACTS ❑ Drainage Easementz ❑ Access Easement ❑ Native Growth Protection Covenant ❑ Tract ❑ Other ❑ Cast in Place Vault ❑ Retaining Wall ❑ Rockery > 4' High ❑ Structural on Steep Slope ❑ Other Part 17 SIGNATURE OF PROFESSIONAL ENGINEER I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the information prgvide ere is accurate. 7/17/2019 2005 Surface Water Design Manual 5 111105 57� S 304th St---- Lakeland North �� ■ N Q � �i+lUlll > w � hSt FEDERAI WcY--S320thSt _ S320thSt- r n Co Panther Cake sra� Park � ' -_"' ^� W A-18 15th St SsN _a 3 saa. vi n � R . n _ yS 348rh St x Aa !:G Project Site E _SW 356th St S 356" St Lakeland S9ut l - Algona 1St n f ur ah _J Ellingson Rd- ` a *� "y- 167 Paclflc - �� Fife Heights Foos Pierce 2215 North 30th Street Suite 300 South 344th Way Grind and Overlay 5111111111111111 Tacoma, WA 11403 mom 253.383.22 TEL 253.383.257572 FAx Site Location Map f � 1 � ' , 1 � i cu ' � O a cu o, r cu CD S2 �\ w Q H1f10S AVM M3Sf13VHZ13A3M 1- -"- - - - •.1 Table A Proposed Impervious Surface: Fill in all applicable blanks below to list the square footage of all new and existing impervious surface areas on your parcel. When calculating impervious surface areas for buildings do not list the living/useable space square -footage, instead list the building roof square - footage measured to the outside edge of the eve or gutter. Impervious New Existine Total Roof Area (House, Attached Garage, Covered Patio, Covered Deck, sq. ft. sq. ft. sq. ft. Covered Porch) Roof Area 11 (Detached Garage) Roof Area (All Out Buildings) On -site Driveway Area Off -site Driveway Area Walkways / Sidewalks / Stepping Stone Area Uncovered Porch and / or Patios Area Uncovered Decks Area Replaced Impervious Area (Considered New Impervious) All Other Impervious Areas Total New Impervious Surface Area Total Existing Impervious Surface Area Total Impervious Areas sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. sq. ft. 4,945 sq. ft. sq. ft. 4,945 sq. ft. sq. ft. sq. ft. sq. ft. 4,945 sq. ft. 0 sq. ft. 4,945 sq. ft. Total Clearing Limits, Site Disturbance / Graded Areas (Include Septic Drainfields Primary and Reserve) 4,945 sq. ft. Total New Pervious Areas [(Total Clearing Limits, Site Disturbance/Graded Areas) — (Total New Impervious Areas)] 0 sq. ft. Total of Excavation Volume 70 Cubic Yard(FILL) Total of Fill Volume (Exported) 70 Cubic Yard Total of Fill Volume (Imported) 0 Cubic Yard Parcel Number: For DPER Staff Use ONLY Application Number: Approved By: Date: I Section 2 1 Conditions and Requirements Summary rY I I I J j j Technical Information Report Grind and Overlay 2180930.10 010130 2.0 2.1 Conditions and Requirements Summary Core Requirements 2.1.1 CR 1 - Discharge at the Natural Location This project will maintain existing drainage patterns by proposing grades that closely match existing and allowing the runoff to flow to the same location. As a result, this project proposes to discharge runoff at the natural location. Stormwater discharge created by the proposed improvements will not adversely affect downstream properties or drainage systems. 2.1.2 CR 2 - Offsite Analysis This project is exempt from providing an offsite analysis sense the proposed improvements will not change the rate, volume, duration, or locations of the discharges to and from the project site. This satisfies exemption 3 in Section 1.2.2. on page 1-27 of the King County Stormwater Manual. 2.1.3 CR 3 - Flow Control This project is exempt from flow control because it proposes less than 5,000 square feet of new plus replaced impervious surface and less than % acres of new pervious surface will be added. 2.1.4 CR 4 - Conveyance System This project does not propose any new conveyance systems. This project will not change the flow characteristics of the site, and as such the existing conveyance system will continue to collect the runoff generated. Refer to section 5.0 for further discussion 2.1.5 CR 5 - Erosion and Sediment Control An erosion and sediment control plan was developed for this site in accordance with the KCSWDM and to conform to the requirements of the National Pollutant Discharge Elimination System (NPDES) Construction Stormwater General Permit, issued by the Department of Ecology (DOE). The full erosion and sediment control plan is described in Section 8.0 and is depicted on the project drawings. 2.1.6 CR 6 - Maintenance and Operations The City of Federal Way will own and operate all onsite stormwater facilities. An Operations and Maintenance Plan will not be required because the City of Federal Way will be responsible for operation and maintenance of onsite stormwater facilities. 2.1.7 CR 7 - Financial Guarantees and Liability If required, the Federal Way School District will provide documentation to establish the appropriate project bond (or other financial guarantee) amount. 2.1.8 CR 8 - Water Quality The proposed project includes less than 5,000 square feet of new plus replaced pollution generating impervious surface (PGIS) and bass than 0.75 acre of new PGPS that is not fully dispersed. Therefore, water treatment is not required. Technical Information Report OB03 Grind and Overlay 2-1 2180930.10 2.2 2.1.9 CR 9 — Flow Control Best Management Practices (BMPs) This project is classified as a small road improvement project per section 1.2.9.3.2 of the KCSWDM. Any form of dispersion is considered infeasible due to lack of forested area on or near the site. Full infiltration, limited infiltration, and bioretention are also infeasible due to lack of usable space onsite for these facilities. Permeable pavement is considered infeasible in the driveway areas due to considerably large loads from busses. Permeable pavement is considered infeasible for the ADA curb ramps due to its tendency to spall and create an unsafe surface for pedestrians. Special Requirements 2.2.1 SR 1 - Other Adopted Area -Specific Requirements To our knowledge, there are no other adopted area -specific requirements that are applicable to the project site. 2.2.2 SR 2 - Floodplain/Floodway Delineation Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map No. 53033C1250F was reviewed for this project. It indicates that the project site is within a Zone X area. This area is determined to be outside of the 500-year floodplain. Refer to Figure 2-1 for the Flood Insurance Rate Map. 2.2.3 SR 3 - Flood Protection Facilities The project site does not contain, nor is it adjacent to, any existing flood protection facilities. Project improvements do not include flood protection measures. 2.2.4 SR 4 - Source Control The King County Stormwater Pollution Prevention Manual (KCSPPM) will be referenced for source control measures, in addition to erosion and sediment control measures, during construction. For construction source controls, see Section 8.0, CSWPPP Analysis and Design. For post -construction source controls, see Section 10.0, Operations and Maintenance Plan. 2.2.5 SR 5 - Oil Control The project site is not considered a high -use site. Therefore, it is not subject to oil control requirements. Technical Information Report 2 2 [Bloom Grind and Overlay 2180930.10 Section 2.0 Figures Figure 2-1......... Flood Insurance Rate Map Technical Information Report 018me Grind and Overlay 2180930.10 : jz � J. if a6 g OC7 oii'�J 9� z? 3aa 3ii5 1� g i s -2gae 3 i Fts i W}3 I j J Section 3 Offsite Analysis Technical Information Report 13MI90 Grind and Overlay 2180930.10 3.0 Mite Analysis An offsite analysis is not required for this project. Technical Information Report 1018133 Grind and Overlay 3-1 2180930.10 I Section 4 I I 11 j Flow Control and Water Quality Facilities Analysis and Design Technical Information Report Grind and Overlay 2180930.10 4.0 Flow Control and Water Quality Facilities Analysis and Design 4.1 Flow Control 4.1.1 Existing Site Hydrology (Part A) Existing conditions of the site include a road (S 344th Way) that is completely developed on all sides with commercial buildings, driveways and curb ramps. The existing site sheet flows water over the road to each a curb and gutter which conveys the water to catch basins. The water is then conveyed through pipes into the City of Federal Way storm system located in the right-of- way. 4.1.2 Post Development Site Hydrology (Part B) This project proposes to grind and overlay a section of S 344th Way, replace the two curb ramps at the corner of S 3441" and Weyerhaeuser Way S, and replace the two driveways leading to the Elementary No. 24 (Devey) site. The proposed condition closely matches existing conditions and as such drainage patterns will remain the same as existing. The grind and overlay portion of this project, which is the majority of the project, will not expose the existing base course and as such is considered neither new nor replaced impervious surface. 4.1.3 Performance Standards (Part C) This project is flow control exempt. Additionally, no flow control BMPs are proposed because they are infeasible due to spatial constraints in the right-of-way. As discussed further in section 5.0, the existing conveyance system will be utilized to convey runoff and no calculations are required because the project will not change the flow characteristics of the site. No pollution generating surfaces will be added, and therefore water treatment will not be provided. 4.1.4 Flow Control System (Part D) As discussed in Section 2.1.9, the project is exempt from flow control. This project proposes less than 5,000 square feet of new plus replaced impervious surface and less than % acres of new pervious surface will be added. 4.1.5 Water Quality System (Part E) As discussed in Section 2.1.8, the project is exempt from water quality requirements. The project will not add any new pollution generating surfaces. Technical Information Report 010MM Grind and Overlay 218093010 Section 5 7 Conveyance System Analysis and Design Y Y Y I I J j j Technical Information Report Grind and Overlay 2180930.10 MIDOM 5.0 Conveyance System Analysis and Design Conveyance calculations are not provided because no new conveyance systems are proposed. ~� Existing onsite conveyance systems will not experience a change in flow characteristics as a result of this project and as such the existing conveyance system does not need to be analyzed for capacity (per section 1.2.4.2 of the KCSWDM). 1 I 11 I Technical Information Report 131MOM Grind and Overlay 5-1 2180930.10 I Section 6 I Special Reports and Studies p p I j j j Technical Information Report Grind and Overlay 2180930.10 IMMISM 1 6.0 11 I I I Special Reports and Studies There are no other reports or studies at this time. Technical Information Report Grind and Overlay 2180930.10 6-1 15CIE)a Section 7 Other Permits Technical Information Report [BID130 Grind and Overlay 2180930.10 7.0 Other Permits No other known permits are required at this time. JTechnical Information Report Grind and Overlay 2180930.10 7-1 MIDGM j I I j j Section S CSWPPP Analysis and Design Technical Information Report Grind and Overlay (BIBEIM 2180930.10 1 8.0 CSWPPP Analysis and Design _.l The proposed development will comply with guidelines set forth in the KCSWDM and in conformance with the required Construction Stormwater General Permit. The plan includes erosion/sedimentation control measures designed to prevent sediment -laden runoff from leaving the site or from adversely affecting critical water resources during construction. rl 8.1 ESC Plan Analysis and Design (Part A) The erosion potential of the site is influenced by four major factors: soil characteristics, vegetative ^l cover, topography, and climate. Erosion/sedimentation control is achieved by a combination of 1 structural measures, cover measures, and construction practices that are tailored to fit the specific site. I The following measures will be used to control erosion/sedimentation processes. These measures comply with the Erosion and Sediment Control Standards in the KCSWDM. ^1 Clearing Limits: Prior to beginning land -disturbing activities, clearing limits will be marked with high -visibility plastic fence or temporary construction fencing. Significant vegetation to remain will be marked and protected by fencing. • Cover Measures: Disturbed areas shall be permanently or temporarily covered, as required in Section D.4.2 of the KCSWDM. Temporary measures include plastic sheeting - and mulch. Permanent measures include hydroseed. Perimeter Protection: Perimeter protection is not anticipated to be needed for this project due to the small amount of disturbed area. Inlet protection will be utilized to remove any 1 sediment from surface water. Traffic Area Stabilization: Existing paved surfaces will be used for construction entrance; a stabilized construction entrance may be used, if found necessary. Wheel washing and/or street sweeping will be provided, as necessary, to prevent tracking of sediment onto adjacent surfaces. Sediment Retention: Inlet protection devices will be installed in all catch basins, which will assist with sediment retention during construction. Surface Water Collection: Surface water from the threshold discharge area will sheet flow toward the project boundary or to a catch basin. Inlet protection devices will be installed in all existing catch basins, which will assist with removing sediment from surface water. The disturbed area within the threshold discharge area is small and does not require large collection devices, such as sediment traps or ponds. Dewatering Control: Groundwater is not anticipated to be encountered during ground disturbing activities. If water is encountered, the contractor shall remove it and dispose of it in a manner that does not pollute surface water or cause downstream erosion or flooding. Examples of disposal options include use of a sedimentation bag with outfall to a swale for small volumes of localized dewatering or transporting it in a vehicle for legal offsite disposal. Dust Control: If necessary, the contractor shall spray exposed soils with water to prevent wind transport of soil. Technical Information Report Grind and Overlay 2180930.10 8-1 (DIDMO Flow Control: The disturbed area within the threshold discharge area is very small, approximately 0.2 acres in size or less. Due to the small nature of the site, the need for formal flow control facilities is not anticipated during construction. 8.1.1 ESC Maintenance All ESC measures shall be maintained and reviewed on a regular basis, as prescribed in the maintenance requirements of each BMP (see Figure 8-3). 8.1.2 ESC Supervisor The contractor shall designate an Erosion and Sedimentation Control (ESC) supervisor who shall be responsible for maintenance and review of ESC and for compliance with all permit conditions relating to ESC. The ESC supervisor must be available for rapid response to ESC problems. The ESC supervisor is required to be a Certified Erosion and Sedimentation Control Lead (CESCL), with demonstrated expertise in ESC to perform these reviews and to be responsible for ESC implementation. 8.1.3 Documentation j The ESC supervisor shall review the site at least once a month during the dry season, weekly l during the wet season, and within 24 hours of significant storms. Written records of these reviews shall be kept onsite, with copies submitted to the King County Department of IDevelopment and Environmental Services (DDES) within 48 hours. J If DDES requires that a written record be maintained, a standard ESC Maintenance Report, included here as Figure 8-1, may be used. A copy of all required maintenance reports shall be j kept onsite throughout the duration of construction. 8.1.4 Review Timing During the wet season, weekly reviews shall be carried out every six to eight calendar days. 1 During the dry season, monthly reviews shall be carried out within three days of the calendar day for the last inspection (e.g., if an inspection occurred on June 6, then the next inspection must occur between July 3 and July 9). Reviews shall also take place within 24 hours of significant storms. In general, a significant storm is one with more than 0.5 inch of rain in 24 hours or less. Another indication that a storm is "significant" is if gullies form as a result of the runoff. 8.2 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design (Part B) The below SWPPS Plan shall be completed by the contractor for use during construction of the ` project. Blanks are intentional as they are part of the contractor's means and methods. The Stormwater Pollution Prevention and Spill (SWPPS) Plan includes three elements: a site plan, a pollution prevention report, and a spill prevention and cleanup report. This report includes identifying the expected sources of potential pollution and spills that may occur during construction, and works to develop a plan to prevent pollution and spills. It also develops a plan to mitigate spills that may occur. The SWPPS Plan will be kept onsite at all times during 1 construction. The general contractor will be responsible to ensure that subcontractors are aware of the SWPPS Plan and a form or record will be provided stating that all subcontractors have read and agree to the SWPPS Plan. An employee training worksheet is provided for the contractor's use (see Figure 8-2). Technical Information Report 8 2 1018130 Grind and Overlay 2180930.10 A SWPPS Site Plan will be developed by the contractor. The SWPPS Site Plan, Pollution Prevention Report, and Spill Prevention and Cleanup Report were preliminarily developed and BMPs were selected based on Section 2.3.1.4 of the KCSWDM and the KCSPPM. 8.2.1 Pollution and Spill Prevention Source Controls and BMPs The sources of pollution and spills are identified below, and the BMPs to be used for each source for prevention of both pollution and spills are listed below: Liquids that will be handled or stored onsite are the following: Containers will be stored as shown on the SWPPS Site Plan and include the following types and sizes: Tight -fitting lids shall be placed on all containers containing liquids. Containers shall be covered with plastic sheeting during rain events. Drip pans or absorbent materials shall be placed beneath all mounted container taps and at all potential drip and spill locations during filling and unloading of containers. Containers shall be stored such that if a container leaks or spills, the contents will not be discharged, flow, or be washed into the storm drainage system, surface water, or groundwater. Appropriate spill cleanup materials shall be stored and maintained near the container storage area. Storage area shall be swept and cleaned as needed. Area shall not be hosed down such that water drains to the storm drainage system or neighboring areas. Containers shall be checked daily for leaks and spills and replaced as necessary. All spilled liquids will be collected and disposed of properly. Spill control devices shall be routinely inspected on a weekly basis. Dry pesticides and fertilizers shall be covered with plastic sheeting or stored in a sealed container. Materials shall be stored on pallets or another raised method to prevent contact with stormwater runoff. Alternatively, the materials shall be contained in a manner such that if the container leaks or spills, the contents will not discharge, flow, or be washed into the storm drainage system, surface waters, or groundwater. Maintenance requirements are the same as liquid materials described above. Chemicals that will be handled or stored onsite are the following: . Containers will be stored as shown on the SWPPS Site Plan and include the following types and sizes: . BMPs and maintenance requirements are the same as liquids with the addition of the tollowing Soil, sand, and other erodible materials shall be stored onsite in a contractor -designated location. Materials shall be covered with plastic sheeting per standard detail. Perimeter controls shall be constructed as shown on the TESC plan to prevent eroded materials from leaving the project site. Fueling shall not occur onsite. If fueling does occur onsite, the contractor shall develop a containment plan for spills and provide lighting and signage if fueling occurs at night in conformance with the KCSPPM. Maintenance and repair of vehicles shall not occur onsite. If maintenance or repair of vehicles does occur onsite, the contractor shall develop a spill prevention plan in conformance with the KCSPPM. Truck wheel washing shall occur in a controlled manner, such that runoff is collected and disposed of in a legal manner. Rinsing of hand tools shall occur in a designated location, and water for washing shall be collected and disposed of in a legal manner. Technical Information Report 1018100 Grind and Overlay 8-3 218093010 Contaminated soils shall be covered with plastic sheeting or contained to prevent stormwater from carrying pollutants away to surface or ground waters. Appropriate spill cleanup materials, such as brooms, dustpans, vacuum sweepers, etc., shall be stored and maintained near the storage area. Storage area shall be swept and cleaned as needed. Area shall not be hosed down such that water drains to the storm drainage system, groundwater, surface water, or neighboring areas. During concrete and asphalt construction, the contractor shall provide the following BMPs or equivalent measures, methods or practices as required: 1. Drip pans, ground cloths, heavy cardboard, or plywood wherever concrete, asphalt, and asphalt emulsion chunks and drips are likely to fall unintentionally, such as beneath extraction points from mixing equipment. 2. Storm drains shall be covered to prevent concrete and asphalt from entering the storm system. 3. Concrete, concrete slurry, and rinse water shall be contained and collected, and shall not be washed or allowed to discharge into storm drain, ditch, or neighboring parcels. All collected runoff shall be properly disposed of. 4. Contractor shall designate an area where application and mixing equipment cleaning will be conducted. Rinse water and slurry shall be collected, contained, and disposed of in a legal manner. 5. Routine maintenance: the pouring area shall be swept at the end of each day or more frequently if needed. Loose aggregate chunks and dust shall be collected. Areas shall not be hosed down. The contractor may provide the following optional BMPs if the above do not provide adequate source controls: Cover portable mixing equipment with an awning or plastic sheeting to prevent contact with rainfall - Provide catch basin inserts configured for pollutant removal. pH elevated water shall not be discharged from the site. Contractor shall monitor stormwater for pH prior to discharging from the site. Contractor shall implement a pH treatment plan if pH is not within the natural range. 8.2.2 Responsible Personnel and Contact Information The contractor shall designate a CESCL and post their contact name, company, and phone number and/or email in a readily visible location onsite. -[name with _[company] shall be responsible for pollution and spill prevention and cleanup and can be contacted at _[ hone or femaill Contractor shall fill out the attached Pollution Prevention Team Worksheet (see Figure 8-2). 8.2.3 Pollution and Spill Prevention Worksheets Pollution prevention, BMP implementation reports, material inventory worksheets, pollutant source identification worksheet, and spill/leak report may be found attached as Figure 8-2. Technical Information Report Grind and Overlay 2180930.10 8-4 15MOM J l I I J j 8.2.4 Disposal Methods Contractor shall dispose of contaminated soils and water in a legal manner. Options include the following: Technical Information Report Grind and Overlay 2180930.10 8-5 (01000 I I I I Section 8.0 Figures Figure 8-1 ......... ESC Maintenance Report Figure 8-2......... CSWPP Forms Figure 8-3......... Pollution Prevention Inspection Reports, Spill Prevention Monitoring, and Spill Incident Reports Technical Information Report Grind and Overlay 2180930.10 151ME)a KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL I J II I J ESC MAINTENANCE REPORT Performed By: _ Date: Project Name: DPER Permit #: Clearing Limits Damage OK! Problem Visible OK f Problem Intrusions OK Problem Other OK Problem Mulch Rills/Gullies OK Problem Thickness OK Problem Other OK _ Problem Nets/Blankets Rills/Gullies OK _ Problem Ground Contact OK� Problem Other OK, Problem Plastic Tears/Gaps OK Problem Other OK Problem Seeding Percent Cover OK Problem Rills/Gullies OK, Problem Mulch OK Problem Other OK Problem Sodding Grass Health OK Problem Rills/Gullies OK _ Problem Other OK_ Problem Perimeter Protection including Silt Fence Damage OK _ Problem Sediment Build-up OK _ Problem Concentrated Flow OK _ Problem Other OK _ Problem Flow Control BMP protection Damage OK _ Problem Sedimentation OK _ Problem Concentrated Flow OK _ Problem Rills/Gullies OK _ Problem Intrusions OK _ Problem Other OK _ Problem Brush Barrier Damage OK Problem Sediment Build-up OK Problem Concentrated Flow OK Problem Other OK _ Problem Vegetated Strip Damage OK Problem Sediment Build-up OK_ Problem Concentrated Flow OK Problem Other OK Problem Construction Entrance Dimensions OK _ Problem Sediment Tracking OK Problem Vehicle Avoidance OK _ Problem Other OK_ Problem 2016 Surface Water Design Manual — Appendix D CSWPP Forms 4/24/2016 J KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL Wheel Wash Dimensions OK Problem Sed build up or tracking OK..... Problem Other OK Problem Construction Road Stable Driving Surf. OK _ Problem Vehicle Avoidance OK _ Problem Other OK Problem Sediment Trap/Pond i Sed. Accumulation OK _ Problem Overtopping OK _ Problem Inlet/Outlet Erosion OK Problem Other OK = Problem Catch Basin/Inlet Protection Sed. Accumulation OK _ Problem Damage OK Problem Clogged Filter OK Problem I{ Other OK _ Problem -� Interceptor Dike/Swale Damage OK _ Problem Sed. Accumulation OK _ Problem Overtopping OK _ Problem Other OK _ Problem Pipe Slope Drain Damage OK Problem Inlet/Outlet OK Problem Secure Fittings OK _ Problem 1 Other OK_ Problem Ditches Damage OK Problem Sed. Accumulation OK — Problem Overtopping OK Problem Other OK Problem Outlet Protection I Scour OK _ Problem l Other OK Problem Level Spreader Damage OK Problem Concentrated Flow OK J Problem Rills/Gullies OK Problem Sed. Accumulation OK Problem Other OK Problem Dewatering Controls Sediment OK.. Problem Dust Control Palliative applied OK Problem Miscellaneous Wet Season Stockpile OK_ Problem J Other OK _ Problem Comments: Actions Taken: I Problems Unresolved: j 2016 Surface Water Design Manual —Appendix D CSWPP Forms 4/24/2016 I KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL Completed by: BMP Implementation Title: Date: Develop a plan for implementing each BMP. Describe the steps necessary to implement the BMP (i.e., any construction or design), the schedule for completing those steps (list dates), and the person(s) responsible for implementation. Scheduled Milestone and Person BMPs Description of Action(s) Required for Completion Date(s) Responsible for Implementation Action Good 1. Housekeeping 2. 3 Preventive 1. 2 Maintenance 3. 4. Spill 1. Prevention and 2. Emergency Cleanup 3. Inspections 1. 2. 3. 2016 Surface Water Design Manual — Appendix D CSWPP Forms 4/24/2016 I KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL I I I j BMPs Description of Action(s) Required for Implementation Schedule Milestone and Completion Date(s) Person Responsible for Action Source Control BMPs 1. 2. 3 4. 5. 6. 7. 8. Treatment BMPs 1. 2. 3. 4. Emerging technologies Flow Control BMPs 1. 2. 3. r4. 2016 Surface Water Design Manual — Appendix D CSWPP Forms 4/24/2016 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL l j I j Pollution Prevention Team Responsible Official: Team Leader: Responsibilities: Completed by: Title: Date: Title Office Phone: Cell Phone #: Pager #: (1) Responsibilities: Title: Office Phone: Pager* Cell Phone: (�) Responsibilities: Title: Office Phone: Pager #: Cell Phone #: 2016 Surface Water Design Manual —Appendix D CSWPP Forms 4/24/2016 11 6 d (.) .P :i Q d d � 20 m E _ H d L a O d O y.. Q. O t E 01 O 0 °� O Q N L V) N r R L C01 O ai a L =d IL = N � i c E .L O O .� H Q• ci d Li O d O Q f� Q E G1 Wm C C O N •= m fn w C O f/1 v O d a m c a a r > O O N a n = w �'c = �o� a o z a O c _ ;; �, a a a r = F r vQi (nn 0 CO C0 aL c�i 0 N N I j I i 2 � � } % U) § / (D p k � k� � k 2 � z 6. =(D � % 2CL _ �— o� 2 s (D§� § $ a / 0 CDk E §.2; m o o JD R C ° CL £7 e § k k �f E kf 4 §j /2 @g co :q ■2 _ A) _j R o - 2 § \ m C L J / k k §$ E7 u o e F 2� E %0 ° Ia o c 2 = m L) � e 2 o c � S o § � \i � ` ° 2 `. k �k § E \� \ / « 0 c c •- m� L d Q _ y r 7 R - L C. N_ O CD O O t E Y O J N O v cn `f N L = � O � G> a d O a C. r m E r O 3 O = ea d � o C N O A d E �F i� E � 0 4- L 3 O 7 O O. N y O a E 3 U o a n S 0 a fYJ! J L. _ O z Q � d J N R a N o } c `o 0 :r m a m C. o' r � 3 � 0 C. E N d t d = 3 c A v N m R C °r O r+ = u L � C. O m O d E O -0 w � N CD J r Cl) V d O � C. Gl T 0 i -0 ++ CO i+ y p U H O a N `o •_ c w Cy X C. O a m m O N � N 'a d = O = y � a v O d d �L = m O C. ¢� G N fC .0 fC m (Q J 0 N N 0 I KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL, APPENDIX D 1 D.2 GENERAL CSWPP REQUIREMENTS �l To satisfy the King County requirements for CSWPP, the following steps are required of all construction J projects: 1. Design the plan: In accordance with Sections 2.3.1 and 2.3.3 of the King County Surface Water Design Manual (SWDM), prepare and submit a technical information report (TIR) and a CSWPP plan (comprised of the ESC plan and the SWPPS plan) for King County review. Utilize the standards and details for ESC (Section D.2.1) and SWPPS control (Section D.2.2) of this appendix. Incorporate any l King County review comments as necessary to comply with Core Requirement #5, Section 1.2.5 of the SWDM, the Erosion and Sediment Control and Stormwater Pollution Prevention and Spill Control Standards in this appendix. 2. Construct the approved plan: Construct initial ESC, SWPPS and flow control BMP protection measures on site according to the approved CSWPP plan. 3. Maintain the BMPs: Inspect and maintain all CSWPP measures and flow control BUT protection throughout construction in accordance with the inspection and maintenance standards of Section D.2.4.4 (p. D-114). Keep current any required documentation and reporting. 1 4. Manage the project: Make any changes or additions necessary during construction to ensure that 1 CSWPP measures and flow control BMP protection perform in accordance with Core Requirement #5 and Sections D.2.1, D.2.2 and D.2.4. Coordinate construction in consideration of the applied BMP } strategies. Assure pollutant controls, facility processes and reporting requirements are met in } accordance with Section D.2.3. The CSWPP supervisor is the primary point of contact for all ESC 3 and SWPPP issues (see Section D.2.3.1). 5. Conclude the plan: Prior to final construction approval, meet all the conditions in Section D.2.4.5 (p. D-115) for final stabilization. Proposed projects subject to Simplified Drainage Review as determined in SWDM Section 1.1.2.1 may satisfy King County CSWPP requirements by meeting the Small Site CSWPP requirements specified in Section D.3 (p. D-125) and reiterated in Appendix C of the Surface Water Design Manual titled, "Simplified Drainage Requirements." J 2016 Surface Water Design Manual — Appendix D D-9 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1 ESC MEASURES This section details the ESC measures that are required to minimize erosion and sediment transport off a i construction site and protect areas of existing and proposed flow control BMPs. These ESC measures represent Best Management Practices (BMPS)6 for the control of erosion and entrained sediment as well as other impacts related to construction such as increased runoff due to land disturbing activities. The measures and practices are grouped into nine sections corresponding to each of the nine categories of ESC measures in Core Requirement #5, Section 1.2.5 of the King County Surface Water Design Manual. The introductory paragraphs at the beginning each section present the basic requirement for that category of measures, the purpose of those measures, installation requirements relative to construction activity, guidelines for the conditions of use, and other information relevant to all measures in the section/category. Compliance with each of the nine categories of the ESC measures, to the extent applicable and necessary to meet the performance criteria in Section D.2.1, and compliance with the ESC implementation j requirements in Section D.2.4, constitutes overall compliance with King County's ESC Standards. 1 Note: Additional measures shall be required by the County if the existing standards are insufficient to protect adjacent properties, drainage facilities, or water resources. hThe standards for each individual ESC measure are divided into four sections: 1. Purpose 2. Conditions of Use 3. Design and Installation Specifications 1 4. Maintenance Requirements. y A code and symbol for each measure have also been included for ease of use on ESC plans. Note that the "Conditions of Use" always refers to site conditions. As site conditions change, ESC measures must be changed to remain in compliance with the requirements of this appendix. Whenever compliance with King County ESC Standards is required, all of the following categories of ESC measures must be considered for application to the project site as detailed in the following sections: 1. Clearing Limits: Prior to any site clearing or grading, areas to remain undisturbed during project construction shall be delineated on the project's ESC plan and physically marked on the project site. l 2. Cover Measures: Temporary and permanent cover measures shall be provided when necessary to protect disturbed areas. The intent of these measures is to prevent erosion by having as much area as P possible covered during any period of precipitation. 3. Perimeter Protection: Perimeter protection to filter sediment from sheet flow shall be provided downstream of all disturbed areas prior to upslope grading. 1 4. Traffic Area Stabilization: Unsurfaced entrances, roads, and parking areas used by construction J traffic shall be stabilized to minimize erosion and tracking of sediment offsite. f 5. Sediment Retention: Surface water collected from all disturbed areas of the site shall be routed through a sediment pond or trap prior to release from the site, except those areas at the perimeter of the site small enough to be treated solely with perimeter protection. Sediment retention facilities shall be installed prior to grading any contributing area. 6. Surface Water Collection: Surface water collection measures (e.g., ditches, berms, etc.) shall be installed to intercept all surface water from disturbed areas, convey it to a sediment pond or trap, and discharge it downstream of any disturbed areas. Areas at the perimeter of the site, which are small enough to be treated solely with perimeter protection, do not require surface water collection. 6 Best Management Practices (BMPs) means the best available and reasonable physical, structural, managerial, or behavioral activities, that when singly or in combination, eliminate or reduce the contamination of surface and/or ground waters. 4/24/2016 2016 Surface Water Design Manual — Appendix D D-10 D.2.1.1 CLEARING LIMITS _ Significant sources of upstream surface water that drain onto disturbed areas shall be intercepted and 1 conveyed to a stabilized discharge point downstream of the disturbed areas. Surface water collection measures shall be installed concurrently with or immediately following rough grading and shall be designed, constructed, and stabilized as needed to minimize erosion. 7. Dewatering Control: The water resulting from construction site de -watering activities must be treated prior to discharge or disposed of as specified. 8. Dust Control: Preventative measures to minimize wind transport of soil shall be implemented when a traffic hazard may be created or when sediment transported by wind is likely to be deposited in water resources. 9. Flow Control: Surface water from disturbed areas must be routed through the project's onsite flow control facility or other provisions must be made to prevent increases in the existing site conditions 2- year and 10-year runoff peaks discharging from the project site during construction (flow control j BMP areas (existing or proposed) shall not be used for this purpose). 10. Control Pollutants: Stormwater pollution prevention (SWPPS) measures are required to prevent, reduce, or eliminate the discharge of pollutants to onsite or adjacent stormwater systems or watercourses from construction -related activities such as materials delivery and storage, onsite equipment fueling and maintenance, demolition of existing buildings and disposition of demolition materials and other waste, and concrete handling, washout and disposal. Section D.2.2 describes BMPs specific to this purpose; additionally, several of the ESC BMPs described herein are applicable. 11. Protect Existing and Proposed Flow Control BMPs: Sedimentation and soil compaction reduce the infiltration capacity of native and engineered soils. Protection measures shall be applied/installed and maintained so as to prevent adverse impacts to existing flow control BMPs and areas of proposed flow control BMPs for the project. Adverse impacts can prompt the requirement to restore or replace affected BMPs. 12. Maintain BMPs: Protection measures shall be maintained to assure continued performance of their intended function, to prevent adverse impacts to existing flow control BMPs and areas of proposed flow control BMPs, and protect other disturbed areas of the project. 1 13. Manage the Project: Coordination and timing of site development activities relative to ESC concerns, and timely inspection, maintenance and update of protective measures are necessary to effectively manage the project and assure the success of protective ESC and SWPPS design and - implementation. D.2.1.1 CLEARING LIMITS i Prior to any site clearing or grading, those areas that are to remain undisturbed during project construction shall be delineated. At a minimum, clearing limits shall be installed at the edges of all critical area buffers and any other areas required to be left uncleared such as portions of the site subject to clearing limits under �j KCC 16.82.150, areas around significant trees identified to be retained, flow control BMP areas to be protected, and other areas identified to be left undisturbed to protect sensitive features. Purpose: The purpose of clearing limits is to prevent disturbance of those areas of the project site that are not designated for clearing or grading. This is important because limiting site disturbance is the single most effective method for reducing erosion. Clearing limits may also be used to control construction traffic, thus reducing the disturbance of soil and limiting the amount of sediment tracked off site. —A, When to Install: Clearing limits shall be installed prior to the clearing and/or grading of the site. Measures to Use: Marking clearing limits by delineating the site with a continuous length of brightly colored survey tape is sometimes sufficient. The tape may be supported by vegetation or stakes, and it shall be 3 to 6 feet high and highly visible. Critical areas and their buffers require more substantial protection and shall be delineated with plastic or metal safety fences or stake and wire fences. Fencing may be required at the County's discretion to control construction traffic or at any location where greater 2016 Surface Water Design Manual — Appendix D D-11 4/24/2016 J SECTION D.2.1 ESC MEASURES I protection is warranted. Permanent fencing may also be used if desired by the applicant. Silt fence, in combination with survey flagging, is also an acceptable method of marking critical areas and their buffers. D.2.1.1.1 PLASTIC OR METAL FENCE Code: FE Symbol: Purpose Fencing is intended to (1) restrict clearing to approved limits; (2) prevent disturbance of critical areas, their buffers, and other areas required to be left undisturbed; (3) limit construction traffic to designated construction entrances or roads; and (4) protect areas where marking with survey tape may not provide adequate protection. Conditions of Use To establish clearing limits, plastic or metal fence may be used: 1. At the boundary of critical areas, their buffers, and other areas required to be left uncleared. 2. As necessary to control vehicle access to and on the site (see Sections D.2.1.4.1 and D.2.1.4.2). Design and Installation Specifications 1. The fence shall be designed and installed according to the manufacturer's specifications. 2. The fence shall be at least 3 feet high and must be highly visible. 3. The fence shall not be wired or stapled to trees. Maintenance Requirements 1. If the fence has been damaged or visibility reduced, it shall be repaired or replaced immediately and visibility restored. 2. Disturbance of a critical area, critical area buffer, native growth retention area, or any other area required to be left undisturbed shall be reported to the County for resolution. D.2.1.2 COVER MEASURES l �j 4/24/2016 Temporary and permanent cover measures shall be provided to protect all disturbed areas, including the faces of cut and fill slopes. Temporary cover shall be installed if an area is to remain unworked for more than seven days during the dry season (May 1 to September 30) or for more than two consecutive working days during the wet season (October 1 to April 30). These time limits may be relaxed if an area poses a low risk of erosion due to soil type, slope gradient, anticipated weather conditions, or other factors. Conversely, the County may reduce these time limits if site conditions warrant greater protection (e.g., adjacent to significant aquatic resources or highly erosive soils) or if significant precipitation (see Section D.2.4.2) is expected. Any area to remain unworked for more than 30 days shall be seeded or sodded, unless the County determines that winter weather makes vegetation establishment infeasible. During the wet season, slopes and stockpiles at 3H:1V or steeper and with more than ten feet of vertical relief shall be covered if they are to remain unworked for more than 12 hours. Also during the wet season, the material necessary to cover all disturbed areas must be stockpiled on site. The intent of these cover requirements is to have as much area as possible covered during any period of precipitation. Purpose: The purpose of covering exposed soils is to prevent erosion, thus reducing reliance on less effective methods that remove sediment after it is entrained in runoff. Cover is the only practical method of reducing turbidity in runoff. Structural measures, such as silt fences and sediment ponds, are only capable of removing coarse particles and in most circumstances have little to no effect on turbidity. 2016 Surface Water Design Manual — Appendix D D-12 D.2.1.2 COVER MEASURES When to Install: Any exposed soils that will remain unworked for more than the time limit set above shall l be covered by the end of the working day. If the exposed area is to remain unworked for more than 30 days, the area shall be seeded with the temporary seed mix or an equivalent mix that will provide rapid protection (see Section D.2.1.2.6). If the disturbed area is to remain unworked for a year or more or if the j area has reached final grade, permanent seed mix or an equivalent mix shall be applied. Measures to Use: Cover methods include the use of surface roughening, mulch, erosion control nets and blankets, plastic covering, seeding, and sodding. Mulch and plastic sheeting are primarily intended to i protect disturbed areas for a short period of time, typically days to a few months. Seeding and sodding are measures for areas that are to remain unworked for months. Erosion nets and blankets are to be used in conjunction with seeding steep slopes. The choice of measures is left to the designer; however, there are 1 restrictions on the use of these methods, which are listed in the "Conditions of Use" and the "Design and Installation Specifications" sections for each measure. The methods listed are by no means exhaustive. Variations on the standards presented here are f encouraged if other cost-effective products or methods provide substantially equivalent or superior performance. Also, the details of installation can, and should, vary with the site conditions. A useful reference on the application of cover measures in the Puget Sound area is Improving the Cost Effectiveness of Highway Construction Site Erosion and Pollution Control, Horner, Guedry, and Kortenhof (1990). D.2.1.2.1 SURFACE ROUGHENING Purpose The purpose of surface roughening is to aid in the establishment of vegetative cover and to reduce runoff velocity, increase infiltration, and provide for sediment trapping through the provision of a rough soil surface. The rough soil surface may be created by operating a tiller or other equipment on the contour to form horizontal depressions or by leaving slopes in a roughened condition by not fine grading. Conditions of Use 1. All slopes steeper than 3H:1V and greater than 5 vertical feet require surface roughening. 2. Areas with grades steeper than 3H:1 V should be roughened to a depth of 2 to 4 inches prior to seeding. 3. Areas that will not be stabilized immediately may be roughened to reduce runoff velocity until seeding takes place. 4. Slopes with a stable rock face do not require roughening. 5. Slopes where mowing is planned should not be excessively roughened. : Design and Installation Specifications i There are different methods for achieving a roughened soil surface on a slope, and the selection of an appropriate method depends upon the type of slope. Roughening methods include stair -step grading, grooving, contour furrows, and tracking. See Figure D.2.1.2.A for information on tracking and contour furrows. Factors to be considered in choosing a method are slope steepness, mowing requirements, and whether the slope is formed by cutting or filling. Sole reliance on roughening for temporary erosion control is of limited effectiveness in intense rainfall events. Stair -step grading may not be practical for sandy, steep, or shallow soils. 1. Disturbed areas that will not require mowing may be stair -step graded, grooved, or left rough after filling 2. Stair Step grading is particularly appropriate in soils containing large amounts of soft rock. Each "step" catches material that sloughs from above, and provides a level site where vegetation can _1 2016 Surface Water Design Manual — Appendix D D-13 4/24/2016 SECTION D.2.1 ESC MEASURES become established. Stairs should be wide enough to work with standard earth moving equipment. ^l Stair steps must be on contour or gullies will form on the slope. 3. Areas that will be mowed (slopes less steep than 3H:1V) may have small furrows left by disking, harrowing, raking, or seed -planting machinery operated on the contour. 4. Graded areas with slopes greater than 3H:1V but less than 2H:1V should be roughened before seeding. This can be accomplished in a variety of ways, including "track walking" or driving a -� crawler tractor up and down the slope, leaving a pattern of cleat imprints parallel to slope contours. 5. Tracking is done by operating equipment up and down the slope to leave horizontal depressions in the soil. Maintenance Standards Periodically check roughened, seeded, planted, and mulched slopes for rills and gullies, particularly after a �l significant storm event. Fill these areas slightly above the original grade, then re -seed and mulch as soon as possible. J 4/24/2016 2016 Surface Water Design Manual — Appendix D D-14 D.2.1.2 COVER MEASURES - FIGURE D.2.1.2.A SURFACE ROUGHENING TRACKING I e e e. e e e oa e e e e � � e e � e e e � e � � e e e � � "TRACKING" WITH MACHINERY UP AND DOWN THE SLOPE PROVIDES GROOVES THAT WILL CATC _ SEED, RAINFALL AND REDUCE RUNOFF. e e SURFACE ROUGHENING BY TRACKING AND CONTOUR FURROWS NTS 2016 Surface Water Design Manual — Appendix D D-15 4/24/2016 SECTION D.2.1 ESC MEASURES I D.2.1.2.2 MULCHING Code: MU Symbol: Purpose The purpose of mulching soils is to provide immediate temporary protection from erosion. Mulch also enhances plant establishment by conserving moisture, holding fertilizer, seed, and topsoil in place, and moderating soil temperatures. There is an enormous variety of mulches that may be used. Only the most common types are discussed in this section. Conditions of Use As a temporary cover measure, mulch should be used: 1. On disturbed areas that require cover measures for less than 30 days 2. As a cover for seed during the wet season and during the hot summer months 3. During the wet season on slopes steeper than 3H:lV with more than 10 feet of vertical relief. Design and Installation Specifications For mulch materials, application rates, and specifications, see Table D.2.1.2.A. Note: Thicknesses may be increased for disturbed areas in or near critical areas or other areas highly susceptible to erosion. 1 ` Maintenance Standards 1. The thickness of the cover must be maintained. 2. Any areas that experience erosion shall be remulched and/or protected with a net or blanket. If the erosion problem is drainage related, then the drainage problem shall be assessed and alternate drainage such as interceptor swales may be needed to fix the problem and the eroded area remulched. i D-16 2016 Surface Water Design Manual — Appendix D D.2.1.2 COVER MEASURES TABLE D.2.1.2.A MULCH STANDARDS AND GUIDELI ES Mulch Quality Standards Application Rates Remarks Material Straw Air-dried; free from 2"-3" thick; 5 bales Cost-effective protection when applied with adequate undesirable seed and per 1000 sf or 2-3 thickness. Hand -application generally requires coarse material tons per acre greater thickness than blown straw. Straw should be crimped to avoid wind blow. The thickness of straw may be reduced by half when used in conjunction with seeding. Wood Fiber No growth inhibiting Approx. 25-30 Ibs Shall be applied with hydromulcher. Shall not be Cellulose factors per 1000 sf or used without seed and tackifier unless the 1500-2000 Ibs per application rate is at least doubled. Some wood fiber acre with very long fibers can be effective at lower application rates and without seed or tackifier. Compost No visible water or 2" thick min.; More effective control can be obtained by increasing dust during handling. approx. 100 tons thickness to 3" (2.25 cubic feet per square yard). Must be purchased per acre (approx. Excellent mulch for protecting final grades until from supplier with 1.5 cubic feet per landscaping because it can be directly seeded or Solid Waste Handling square yard) tilled into soil as an amendment. Compost may not Permit. be used in Sensitive Lake? basins unless analysis of the compost shows no phosphorous release. Hydraulic This mulch category Apply at rates from The BFM shall not be applied immediately before, Matrices includes hydraulic 3,000 Ibs per acre during or immediately after rainfall so that the matrix (Bonded slurries composed of to 4,000 Ibs per will have an opportunity to dry for 24 hours after Fiber Matrix) wood fiber, paper fiber acre and based on installation. Application rates beyond 2,500 pounds or a combination of manufacturers may interfere with germination and are not usually the two held together recommendations recommended for turf establishment. BFM is by a binding system. generally a matrix where all fiber and binders are in The BFM shall be a one bag, rather than having to mix components from mixture of long wood various manufacturers to create a matrix. BFMs can fibers and various be installed via helicopter in remote areas. They are bonding agents. approximately $1,000 per acre cheaper to install. Chipped Site Average size shall be 2" minimum This is a cost-effective way to dispose of debris from Vegetation several inches. thickness clearing and grubbing, and it eliminates the problems associated with burning. Generally, it should not be used on slopes above approx. 10% because of its tendency to be transported by runoff. It is not recommended within 200 feet of surface waters. If seeding is expected shortly after mulch, the decomposition of the chipped vegetation may tie up nutrients important to grass establishment. Sensitive lake means a lake that has proved to be particularly prone to eutrophication; the County gives this designation when an active input plan has been adopted to limit the amount of phosphorous entering the lake. 2016 Surface Water Design Manual — Appendix D D-17 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1.2.3 NETS AND BLANKETS N Ei Code: NE Symbol: Purpose Erosion control nets and blankets are intended to prevent erosion and hold seed and mulch in place on steep slopes and in channels so that vegetation can become well established. In addition, some nets and blankets can be used to permanently reinforce turf to protect drainage ways during high flows. Nets are strands of material woven into an open, but high -tensile strength net (for example, jute matting). Blankets are strands of material that are not tightly woven, but instead form a layer of interlocking fibers, typically held together by a biodegradable or photodegradable netting (for example, excelsior or straw blankets). They generally have lower tensile strength than nets, but cover the ground more completely. Coir (coconut fiber) fabric comes as both nets and blankets. Conditions of Use Erosion control nets and blankets should be used: 1. For permanent stabilization of slopes 2H:1 V or greater and with more than 10 feet of vertical relief. 2. In conjunction with seed for final stabilization of a slope, not for temporary cover. However, they may be used for temporary applications as long as the product is not damaged by repeated handling. In fact, this method of slope protection is superior to plastic sheeting, which generates high -velocity runoff (see Section D.2.1.2.4). 3. For drainage ditches and swales (highly recommended). The application of appropriate netting or blanket to drainage ditches and swales can protect bare soil from channelized runoff while vegetation is established. Nets and blankets also can capture a great deal of sediment due to their open, porous structure. Synthetic nets and blankets may be used to permanently stabilize channels and may provide a cost-effective, environmentally preferable alternative to riprap. Design and Installation Specifications 1. See Figure D.2.1.2.B and Figure D.2.1.2.0 for typical orientation and installation of nettings and blankets. Note: Installation is critical to the effectiveness of these products. If good ground contact is not achieved, runoff can concentrate under the product, resulting in significant erosion. 2. With the variety of products available, it is impossible to cover all the details of appropriate use and installation. Therefore, it is critical that the design engineer thoroughly consults the manufacturer's information and that a site visit takes place in order to insure that the product specified is appropriate. 3. Jute matting must be used in conjunction with mulch (Section D.2.1.2.2). Excelsior, woven straw blankets, and coin (coconut fiber) blankets may be installed without mulch. There are many other types of erosion control nets and blankets on the market that may be appropriate in certain circumstances. Other types of products will have to be evaluated individually. In general, most nets j (e.g., jute matting) require mulch in order to prevent erosion because they have a fairly open structure. Blankets typically do not require mulch because they usually provide complete protection of the surface. 4. Purely synthetic blankets are allowed but shall only be used for long-term stabilization of waterways. The organic blankets authorized above are better for slope protection and short-term waterway protection because they retain moisture and provide organic matter to the soil, substantially improving the speed and success of re -vegetation. _1 Maintenance Standards 1. Good contact with the ground must be maintained, and there must not be erosion beneath the net or 4/24/2016 D-18 2016 Surface Water Design Manual — Appendix D i� J D.2.1.2 COVER MEASURES I blanket. 2. Any areas of the net or blanket that are damaged or not in close contact with the ground shall be repaired and stapled. 3. If erosion occurs due to poorly controlled drainage, the problem shall be fixed and the eroded area protected. FIGURE D.2.1.2.B WATERWAY INSTALLATION DO NOT STRETCH BLANKETS/MATTINGS TIGHT - ALLOW THE ROLLS TO MOLD TO ANY IRREGULARITIES. • SLOPE SURFACE SHALL BE SMOOTH BEFORE PLACEMENT FOR PROPER SOIL CONTACT. • ANCHOR, STAPLE, AND INSTALL CHECK SLOTS AS PER MANUFACTURER'S RECOMMENDATIONS. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH. LIME, FERTILIZE AND SEED BEFORE INSTALLATION, MIN.4" OVERLAP' MIN.6" OVERLAP FIGURE D.2.1.2.0 SLOPE INSTALLATION SLOPE SURFACE SHALL BE SMOOTH BEFORE IF THERE IS A BERM AT THE PLACEMENT FOR PROPER SOIL CONTACT TOP OF SLOPE, ANCHOR UPSLOPE OF THE BERM STAPLING PATTERN AS PER ANCHOR IN 6'W" MIN. MANUFACTURER'S RECOMMENDATION - - —_ TRENCH AND STAPLE AT 12" INTERVALS MIN. 2" OVERLAPS /. i � � r. ✓f-ram MIN. 6" OVERLAP h� Z. r `}� ' STAPLE OVERLAPS F x d MAX. 5 SPACING BRING MATERIAL DOWN TO A LEVEL AREA, TURN THE END UNDER 4" AND DO NOT STRETCH BLANKETS/MATTINGS TIGHT - ALLOW STAPLE AT 12" INTERVALS THE ROLLS TO MOLD TO ANY IRREGULARITIES FOR SLOPES LESS THAN 3H:1V, ROLLS MAY BE PLACED LIME, FERTILIZE AND SEED BEFORE INSTALLATION. PLANTING OF SHRUBS, TREES, IN HORIZONTAL STRIPS ETC. SHOULD OCCUR AFTER INSTALLATION 2016 Surface Water Design Manual — Appendix D D-19 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1.2.4 PLASTIC COVERING PC Code: PC Symbol: Purpose Plastic covering provides immediate, short-term erosion protection to slopes and disturbed areas. ' Conditions of Use -� 1. Plastic covering may be used on disturbed areas that require cover measures for less than 30 days. 2. Plastic is particularly useful for protecting cut and fill slopes and stockpiles. Note: The relatively rapid breakdown of most polyethylene sheeting makes it unsuitable for long-term applications. 3. Clear plastic sheeting may be used over newly -seeded areas to create a greenhouse effect and encourage grass growth. Clear plastic should not be used for this purpose during the summer months because the resulting high temperatures can kill the grass. 4. Due to rapid runoff caused by plastic sheeting, this method shall not be used upslope of areas that might be adversely impacted by concentrated runoff. Such areas include steep and/or unstable slopes. j Note: There have been many problems with plastic, usually attributable to poor installation and lmaintenance. However, the material itself can cause problems, even when correctly installed and maintained, because it generates high -velocity runoff and breaks down quickly due to ultraviolet radiation. In addition, if the plastic is not completely removed, it can clog drainage system inlets and outlets. It is highly recommended that alternatives to plastic sheeting be used whenever possible and that its use be limited. Design and Installation Specifications 1. See Figure D.2.1.2.1) for details. 2. Plastic sheeting shall have a minimum thickness of 0.06 millimeters. 3. If erosion at the toe of a slope is likely, a gravel berm, riprap, or other suitable protection shall be installed at the toe of the slope in order to reduce the velocity of runoff. FIGURE D.2.1.2.1) PLASTIC COVERING 10' MAX. TIRES, SANDBAGS, OR r� EQUIVALENT MAY BE USED TO WEIGHT PLASTIC SEAMS BETWEEN SHEETS MUST OVERLAP A MINIMUM OF 12" AND BE WEIGHTED OR TAPED * 10' MAX. TOE IN SHEETING: IN MINIMUM 4"X4" TRENCH PROVIDE ENERGY DISSIPATION AT TOE WHEN NEEDED 4/24/2016 2016 Surface Water Design Manual — Appendix D D-20 D.2.1.2 COVER MEASURES Maintenance Standards for Plastic Covering 1. Torn sheets must be replaced and open seams repaired. 2. If the plastic begins to deteriorate due to ultraviolet radiation, it must be completely removed and replaced. 3. When the plastic is no longer needed, it shall be completely removed. D.2.1.2.5 STRAW WATTLES Code: SW Symbol: Purpose Wattles are erosion and sediment control barriers consisting of straw wrapped in biodegradable tubular plastic or similar encasing material. Wattles may reduce the velocity and can spread the flow of rill and sheet runoff, and can capture and retain sediment. Straw wattles are typically 8 to 10 inches in diameter and 25 to 30 feet in length. The wattles are placed in shallow trenches and staked along the contour of disturbed or newly constructed slopes. Conditions of Use 1. Install on disturbed areas that require immediate erosion protection. 2. Use on slopes requiring stabilization until permanent vegetation can be established. 3. Can be used along the perimeter of a project, as a check dam in unlined ditches and around temporary stockpiles 4. Wattles can be staked to the ground using willow cuttings for added revegetation. 5. Rilling can occur beneath and between wattles if not properly entrenched, allowing water to pass below and between wattles Design and Installation Specifications 1. It is critical that wattles are installed perpendicular to the flow direction and parallel to the slope contour. 2. Narrow trenches should be dug across the slope, on contour, to a depth of 3 to 5 inches on clay soils and soils with gradual slopes. On loose soils, steep slopes, and during high rainfall events, the trenches should be dug to a depth of 5 to 7 inches, or'/z to 2/3 of the thickness of the wattle. 3. Start construction of trenches and installing wattles from the base of the slope and work uphill. Excavated material should be spread evenly along the uphill slope and compacted using hand tamping or other method. Construct trenches at contour intervals of 3 to 30 feet apart depending on the steepness of the slope, soil type, and rainfall. The steeper the slope the closer together the trenches should be constructed. 4. Install the wattles snugly into the trenches and abut tightly end to end. Do not overlap the ends. 5. Install stakes at each end of the wattle, and at 4 foot centers along the entire length of the wattle. 6. If required, install pilot holes for the stakes using a straight bar to drive holes through the wattle and into the soil. 7. At a minimum, wooden stakes should be approximately 3/4 x 3/4 x 24 inches. Willow cuttings or 3/8 inch rebar can also be used for stakes. 2016 Surface Water Design Manual — Appendix D D-21 4/24/2016 SECTION D.2.1 ESC MEASURES I I I J I J J 4/24/2016 J 8. Stakes should be driven through the middle of the wattle, leaving 2 to 3 inches of the stake protruding above the wattle. Maintenance Standards 1. Inspect wattles prior to forecasted rain, daily during extended rain events, after rain events, weekly during the wet season, and at two week intervals at all other times of the year. 2. Repair or replace split, torn, raveling, or slumping wattles 3. Remove sediment accumulations when exceeding % the height between the top of the wattle and the ground surface. D-22 2016 Surface Water Design Manual — Appendix D D.2.1.2 COVER MEASURES FIGURE D.2.1.2.E STRAW WATTLES STRAW ROLLS MUST BE PLACED ALONG SLOPE CONTOURS 10'-25' (3-8m) ROLL SPACING DEPENDS ON SOIL TYPE AND SLOPE STEEPNESS 3'-4' f (1.2m) ADJACENT ROLLS SHALL TIGHTLY ABUT SEDIMENT, ORGANIC MATTER, AND NATIVE SEEDS ARE CAPTURED BEHIND THE ROLLS 3"-5' (75-125mm) RAW WATTLES 1" x 1" STAKE NTS NOTES: 1. STRAW ROLL INSTALLATION REQUIRES THE PLACEMENT AND SECURE STAKING OF THE ROLL IN A TRENCH, 3" x 5" (75-125mm) DEEP, DUG ON CONTOUR. 2. RUNOFF MUST NOT BE ALLOWED TO RUN UNDER OR AROUND ROLL. 2016 Surface Water Design Manual — Appendix D D-23 8"-10" DIA. (200-250mm) 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1.2.6 TEMPORARY AND PERMANENT SEEDING S� Code: SE Symbol: Purpose Seeding is intended to reduce erosion by stabilizing exposed soils. A well -established vegetative cover is one of the most effective methods of reducing erosion. Conditions of Use 1. Seeding shall be used throughout the project on disturbed areas that have reached final grade or that will remain unworked for more than 30 days. 2. Vegetation -lined channels shall be seeded. Channels that will be vegetated should be installed before major earthwork and hydroseeded or covered with a Bonded Fiber Matrix (BFM). 3. Retention/detention ponds shall be seeded as required. 4. At the County's discretion, seeding without mulch during the dry season is allowed even though it will take more than seven days to develop an effective cover. Mulch is, however, recommended at all times because it protects seeds from heat, moisture loss, and transport due to runoff. 5. At the beginning of the wet season, all disturbed areas shall be reviewed to identify which ones can be seeded in preparation for the winter rains (see Section D.2.4.2). 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 DPER inspector. The DPER inspector may require seeding of additional areas in order to protect surface waters, adjacent properties, or drainage facilities. 6. At final site stabilization, all disturbed areas not otherwise vegetated or stabilized shall be seeded and mulched (see Section D.2.4.5). Design and Installation Specifications 1. The best time to seed is April 1 through June 30, and September 1 through October 15. Areas may be seeded between July 1 and August 31, but irrigation may be required in order to grow adequate cover. Areas may also be seeded during the winter months, but it may take several months to develop a dense groundcover due to cold temperatures. The application and maintenance of mulch is critical for winter seeding. 2. To prevent seed from being washed away, confirm that all required surface water control measures have been installed. 3. The seedbed should be firm but not compacted because soils that are well compacted will not vegetate as quickly or thoroughly. Slopes steeper than 3H:1V shall be surface roughened. Roughening can be accomplished in a variety of ways, but the typical method is track walking, or driving a crawling tractor up and down the slope, leaving cleat imprints parallel to the slope contours. - 4. In general, 10-20-20 N-P-K (nitrogen -phosphorus -potassium) fertilizer may be used at a rate of 90 pounds per acre. Slow -release fertilizers are preferred because they are more efficient and have fewer environmental impacts. It is recommended that areas being seeded for final landscaping conduct soil tests to determine the exact type and quantity of fertilizer needed. This will prevent the over - application of fertilizer. Disturbed areas within 200 feet of water bodies and wetlands must use slow - release low -phosphorus fertilizer (typical proportions 3-1-2 N-P-K). 4/24/2016 5. The following requirements apply to mulching: a) Mulch is always required for seeding slopes greater than 3H:1 V (see Section D.2.1.2.2). 2016 Surface Water Design Manual — Appendix D D-24 D.2.1.2 COVER MEASURES b) If seeding during the wet season, mulch is required. c) The use of mulch may be required during the dry season at the County's discretion if grass growth is expected to be slow, the soils are highly erodible due to soil type or gradient, there is a water body close to the disturbed area, or significant precipitation (see Section D.2.4.2) is anticipated before the grass will provide effective cover. d) Mulch may be applied on top of the seed or simultaneously by hydroseeding. 6. Hydroseeding is allowed as long as tackifier is included. Hydroseeding with wood fiber mulch is adequate during the dry season. During the wet season, the application rate shall be doubled because the mulch and tackifier used in hydroseeding break down fairly rapidly. It may be necessary in some applications to include straw with the wood fiber, but this can be detrimental to germination. 7. Areas to be permanently landscaped shall use soil amendments. Good quality topsoil shall be tilled into the top six inches to reduce the need for fertilizer and improve the overall soil quality. Most native soils will require the addition of four inches of well -rotted compost to be tilled into the soil to provide a good quality topsoil. Compost used should meet specifications provided in Reference 11-C of the SWUM. 8. The seed mixes listed below include recommended mixes for both temporary and permanent seeding. These mixes, with the exception of the wetland mix, shall be applied at a rate of 120 pounds per acre. This rate may be reduced if soil amendments or slow -release fertilizers are used. Local suppliers should be consulted for their recommendations because the appropriate mix depends on a variety of I factors, including exposure, soil type, slope, and expected foot traffic. Alternative seed mixes approved by the County may be used. I J I J Table D.2.1.2.13 presents the standard mix for those areas where just a temporary vegetative cover is required. 'TABLE D.2.1.2.B TEMPORARY EROSION CONTROL SEED MIX % Weight % Purity % Germination Chewings or red fescue 40 98 90 Festuca rubra var. commutate or Festuca rubra Annual or perennial rye 40 98 90 Lolium multiflorum or Lolium perenne Redtop or colonial bentgrass 10 92 85 Agrostis alba or Agrostis tenuis White dutch clover 10 98 90 Trifolium repens 2016 Surface Water Design Manual — Appendix D D-25 4/24/2016 SECTION D.2.1 ESC MEASURES Table D.2.1.2.0 provides just one recommended possibility for landscaping seed. TABLE D.2.1.2.0 LANDSCAPING SEED MIX % Weight % Purity % Germination Perennial rye blend 70 98 90 Lolium perenne Chewings and red fescue blend 30 98 90 Festuca rubra var. commutate or Festuca rubra f This turf seed mix in Table D.2.1.2.D is for dry situations where there is no need for much water. The advantage is that this mix requires very little maintenance. TABLE D.2.1.2.1) LOW -GROWING TURF SEED MIX % Weight V % Purity I % Germination Dwarf tall fescue (several varieties) 45 98 90 Festuca arundinacea var. Dwarf perennial rye (Barclay) 30 98 90 Lolium perenne var. barclay Red fescue 20 98 90 Festuca rubra Colonial bentgrass 5 98 90 Agrostis tenuis Table D.2.1.2.E presents a mix recommended for bioswales and other intermittently wet areas. Sod shall generally not be used for bioswales because the seed mix is inappropriate for this application. Sod may be J used for lining ditches to prevent erosion, but it will provide little water quality benefit during the wet season. 11 J 4/24/2016 TABLE D.2.1.2.E BIOSWALE SEED MIX* % Weight % Purity % Germination Tall or meadow fescue 75-80 98 90 Festuca arundinacea or Festuca elatior Seaside/Creeping bentgrass 10-15 92 85 Agrostis palustris Redtop bentgrass 5-10 90 80 Agrostis a/ba or Agrostis gigantea Modified Briargreen, Inc. Hydroseeding Guide Wetlands Seed Mix 2016 Surface Water Design Manual — Appendix D D-26 D.2.1.2 COVER MEASURES The seed mix shown in Table D.2.1.2.F is a recommended low -growing, relatively non-invasive seed mix appropriate for very wet areas that are not regulated wetlands (if planting in wetland areas, see Section 6.3.1 of the King County Surface Water Design Manual). Other mixes may be appropriate, depending on the soil type and hydrology of the area. Apply this mixture at a rate of 60 pounds per acre. TABLE D.2.1.2.F WET AREA SEED MIX* % Weight % Purity % Germination Tall or meadow fescue 60-70 98 90 Festuca arundinacea or Festuca elation Seaside/Creeping bentgrass 10-15 98 85 Agrostis palustris Meadow foxtail 10-15 90 80 Alepocurus pratensis Alsike clover 1-6 98 90 Trifolium hybridum Redtop bentgrass 1-6 92 85 Agrostis albs * Modified Briargreen, Inc. Hydroseeding Guide Wetlands Seed Mix The meadow seed mix in Table D.2.1.2.G is recommended for areas that will be maintained infrequently or not at all and where colonization by native plants is desirable. Likely applications include rural road and utility right-of-way. Seeding should take place in September or very early October in order to obtain adequate establishment prior to the winter months. The appropriateness of clover in the mix may need to be considered as this can be a fairly invasive species. If the soil is amended, the addition of clover may not be necessary. TABLE D.2.1.2.G MEADOW SEED MIX % Weight % Purity % Germination Redtop or Oregon bentgrass Agrostis albs or Agrostis oregonensis 40 92 85 Red fescue Festuca rubra 40 98 90 White dutch clover Trifolium repens 20 98 90 Maintenance Standards for Temporary and Permanent Seeding _J 1. Any seeded areas that fail to establish at least 80 percent cover within one month shall be reseeded. If reseeding is ineffective, an alternate method, such as sodding or nets/blankets, shall be used. If winter weather prevents adequate grass growth, this time limit may be relaxed at the discretion of the County when critical areas would otherwise be protected. -1 2016 SurD-27 Sur -face Water Design Manual — Appendix D 4/24/2016 SECTION D.2.1 ESC MEASURES 2. After adequate cover is achieved, any areas that experience erosion shall be re -seeded and protected by mulch. If the erosion problem is drainage related, the problem shall be fixed and the eroded area re -seeded and protected by mulch. 3. Seeded areas shall be supplied with adequate moisture, but not watered to the extent that it causes 1 runoff. D.2.1.2.7 SODDING So Code: SO Symbol: Purpose The purpose of sodding is to establish permanent turf for immediate erosion protection and to stabilize drainage ways where concentrated overland flow will occur. Conditions of Use Sodding may be used in the following areas: 1. Disturbed areas that require short-term or long-term cover 2. Disturbed areas that require immediate vegetative cover 3. All waterways that require vegetative lining (except biofiltration swales—the seed mix used in most sod is not appropriate for biofiltration swales). Waterways may also be seeded rather than sodded, and protected with a net or blanket (see Section D.2.1.2.3). Design and Installation Specifications Sod shall be free of weeds, of uniform thickness (approximately 1-inch thick), and shall have a dense root mat for mechanical strength. The following steps are recommended for sod installation: 1. Shape and smooth the surface to final grade in accordance with the approved grading plan. 2. Amend four inches (minimum) of well -rotted compost into the top eight inches of the soil if the organic content of the soil is less than ten percent. Compost used shall meet compost specifications per SWDM Reference 11-C. 3. Fertilize according to the supplier's recommendations. Disturbed areas within 200 feet of water bodies and wetlands must use non -phosphorus fertilizer. 4. Work lime and fertilizer 1 to 2 inches into the soil, and smooth the surface. 5. Lay strips of sod beginning at the lowest area to be sodded and perpendicular to the direction of water flow. Wedge strips securely into place. Square the ends of each strip to provide for a close, tight fit. Stagger joints at least 12 inches. Staple on slopes steeper than 3H:1V. —� 6. Roll the sodded area and irrigate. 7. When sodding is carried out in alternating strips or other patterns, seed the areas between the sod immediately after sodding. Maintenance Standards 4/24/2016 If the grass is unhealthy, the cause shall be determined and appropriate action taken to reestablish a healthy groundcover. If it is impossible to establish a healthy groundcover due to frequent saturation, instability, or some other cause, the sod shall be removed, the area seeded with an appropriate mix, and protected with a net or blanket. 2016 Surface Water Design Manual — Appendix D D-28 �1 D.2.1.2 COVER MEASURES 1 D.2.1.2.8 POLYACRYLMMDE FOR SOIL EROSION PROTECTION Purpose Polyacrylamide (PAM) is used on construction sites to prevent soil erosion. Applying PAM to bare soil in advance of a rain event significantly reduces erosion and controls sediment in two ways. First, PAM increases the soil's available pore volume, thus increasing infiltration through flocculation and reducing the quantity of stormwater runoff. Second, it increases flocculation of suspended particles and aids in their deposition, thus reducing stormwater runoff turbidity and improving water quality. 1 Conditions of Use 1. PAM shall not be directly applied to water or allowed to enter a water body. p 2. PAM may be applied to wet soil, but dry soil is preferred due to less sediment loss. 3. PAM will work when applied to saturated soil but is not as effective as applications to dry or damp l soil. 4. PAM may be applied only to the following types of bare soil areas that drain to a sediment trap or a i sediment pond: • Staging areas ■ Stockpiles • Pit sites 1 ■ Balanced cut and fill earthwork ■ Haul roads prior to placement of crushed rock surfacing • Compacted soil road base 5. PAM may be applied only during the following phases of construction: } • During rough grading operations 1 After final grade and before paving or final seeding and planting ■ During a winter shut down of site work. In the case of winter shut down, or where soil will remain unworked for several months, PAM should be used together with mulch. 6. Do not use PAM on a slope that flows directly to a stream or wetland. The stormwater runoff shall 1 pass through a sediment control measure prior to discharging to surface waters. J Design and Installation Specifications - f 1. PAM must be applied using one of two methods of application, "preferred" or "alternative." The 1 specifications for these methods are described under separate headings below. 2. PAM may be applied in dissolved form with water, or it may be applied in dry, granular or powdered form. The preferred application method is the dissolved form. 3. PAM is to be applied at a maximum rate of/z pound PAM per 1000 gallons of water per 1 acre of bare soil. Table D.2.1.2.H may be used to determine the PAM and water application rate for disturbed soil areas. Higher concentrations of PAM do not provide any additional effectiveness. 4. Do not add PAM to water discharging from the site. 5. PAM shall be used in conjunction with other ESC measures and not in place of them. When the total drainage area is greater than or equal to 3 acres, PAM treated areas shall drain to a sediment pond per Section D.2.1.5.2. For drainage areas less than 3 acres, PAM treated areas must drain to a sediment trap per Section D.2.1.5.1. Other normally required sediment control measures such as perimeter `1 D-29 2016 Surface Water Design Manual — Appendix D 4/24/2016 SECTION D.2.1 ESC MEASURES 1 protection measures (Section D.2.1.3) and surface water collection measures (Section D.2.1.6) shall be applied to PAM treated areas. 6. All areas not being actively worked shall be covered and protected from rainfall. PAM shall not be the only cover BMP used. 7. Keep the granular PAM supply out of the sun. Granular PAM loses its effectiveness in three months after exposure to sunlight and air. I 8. Care must be taken to prevent spills of PAM powder onto paved surfaces. PAM, combined with water, is very slippery and can be a safety hazard. During an application of PAM, prevent over -spray from reaching pavement as the pavement will become slippery. If PAM powder gets on skin or 1 clothing, wipe it off with a rough towel rather than washing with water. Washing with water only l makes cleanup more difficult, messier, and time consuming. _ 9. The specific PAM copolymer formulation must be anionic. Cationic PAM shall not be used in any 1 application because of known aquatic toxicity concerns. Only the highest drinking water grade PAM, certified for compliance with ANSI/NSF Standard 60 for drinking water treatment, may be used for soil applications. The Washington State Department of Transportation (WSDOT) lists approved PAM products on their web page. All PAM use shall be reviewed and approved by DPER. 10. The PAM anionic charge density may vary from 2 — 30 percent; a value of 18 percent is typical. Studies conducted by the United States Department of Agriculture (USDA)/ARS demonstrated that soil stabilization was optimized by using very high molecular weight (12 —15 mg/mole), highly anionic (>20% hydrolysis) PAM. 11. PAM must be "water soluble" or "linear" or "non -cross -linked." Cross -linked or water absorbent PAM, polymerized in highly acidic (pH<2) conditions, are used to maintain soil moisture content. TABLE D.2.1.2.H PAM AND WATER APPLICATION RATES Disturbed Area (ac) PAM (Ibs) Water (gal) 0.50 0.25 500 1.00 0.50 1,000 1.50 0.75 1,500 2.00 1.00 2,000 2.50 1.25 2,500 3.00 1 1.50 3,000 3.50 1.75 3,500 4.00 2.00 4,000 4.50 2.25 4,500 5.00 2.50 5,000 Preferred Application Method 1. Pre -measure the area where PAM is to be applied and calculate the amount of product and water necessary to provide coverage at the specified application rate (1/2 pound PAM/1,000 gallons/acre). 2. Dissolve pre -measured dry granular PAM with a known quantity of clean water in a bucket several hours or overnight. PAM has infinite solubility in water, but dissolves very slowly. Mechanical mixing will help dissolve PAM. Always add PAM to water — not water to PAM. 2016 Surface Water Design Manual — Appendix D D-30 D.2.1.2 COVER MEASURES 3. Pre -fill the water truck about 1/8 full with water. The water does not have to be potable, but it must have relatively low turbidity — in the range of 20 NTU or less. 4. Add PAM/Water mixture to the truck. 5. Completely fill the water truck to specified volume. 6. Spray PAM/Water mixture onto dry soil until the soil surface is uniformly and completely wetted. Alternate Application Method PAM may also be applied as a powder at the rate of 5 pounds per acre. This must be applied on a day that is dry. For areas less than 5-10 acres, a hand-held "organ grinder" fertilized spreader set to the smallest setting will work. Tractor mounted spreaders will work for larger areas. Maintenance Standards 1. PAM may be reapplied on actively worked areas after a 48-hour period Reapplication is not required unless PAM treated soil is disturbed or unless turbidity levels show the need for an additional application. If PAM treated soil is left undisturbed, a reapplication may be necessary after two months. More PAM applications may be required for steep slopes, silty and clay soils, (USDA classification Type "C" and "D" soils), long grades, and high precipitation areas. When PAM is applied first to bare soil and then covered with straw, a reapplication may not be necessary for several months. D.2.1.2.9 COMPOST BLANKETS Code: COBL Symbol: } Purpose Compost blankets are intended to: • Provide immediate temporary protection from erosion by protecting soil from rainfall and slowing flow velocity over the soil surface. Enhance temporary or permanent plant establishment by conserving moisture, holding seed and topsoil in place, providing nutrients and soil microorganisms, and moderating soil temperatures. l • Compost blankets, applied at the proper thickness and tilled into the soil, are also an option for amending soils for permanent landscaping. Compost generally releases and adds phosphorous to stormwater. Therefore, compost blankets are not recommended for use in watersheds where phosphorous sensitive water resources are located. Unless prior approval is given by the County, they should not be used in Sensitive Lake Watersheds. Conditions of Use I1. Compost blankets may be used unseeded on disturbed areas that require temporary cover measures up to 1 year. Compost applied as temporary cover may be reclaimed and re -used for permanent cover. i 2. Compost provides cover for protecting final grades until landscaping can be completed as it can be directly seeded or tilled into soil as an amendment. 3. Compost blankets meet mulch requirements for seed. 4. Seed may be applied to a compost blanket at any time for permanent or temporary stabilization of disturbed areas. Seed may be applied prior to blanket application, on top of blankets, or injected and mixed into the compost as it is applied. 2016 Surface Water Design Manual — Appendix D 4/24/2016 � D-31 SECTION D.2.1 ESC MEASURES 5. Compost blankets maybe applied on slopes up to 2H:1V. Design and Installation Specifications 1. Compost shall be applied at a minimum of 2 inches thick, unless otherwise directed by an ESC supervisor or King County. At an application of 2 inches, this will equal approximately 100 tons per acre (compost generally weighs approximately 800 lbs per cubic yard). Thickness shall be increased at the direction of the design engineer for disturbed areas in or near critical areas or other areas highly susceptible to erosion. 2. Compost shall meet criteria in Reference 11-C of the 5WDM. �1 3. Compost shall be obtained from a supplier meeting the requirements in Reference 11-C. 4. Compost blankets shall be applied over the top of the slope to which it is applied, to prevent water from running under the blanket 5. Compost blankets shall not be used in areas exposed to concentrated flow (e.g. channels, ditches, dikes) Maintenance Standards 1. The specified thickness of the blanket/cover must be maintained. j 2. Any areas that show signs of erosion must be re -mulched. If the erosion problem is drainage related, ` then the drainage problem must first be remedied and then the eroded area re -mulched. I D-32 2016 Surface Water Design Manual — Appendix D D.2.1.3 PERIMETER PROTECTION 1 J D.2.1.3 PERIMETER PROTECTION Perimeter protection to filter sediment from sheetwash shall be located downslope of all disturbed areas and shall be installed prior to upslope grading. Perimeter protection includes the use of vegetated strips as well as, constructed measures, such as silt fences, fiber rolls, sand/gravel barriers, brush or rock filters, triangular silt dikes and other methods. During the wet season, 50 linear feet of silt fence (and the necessary stakes) per acre of disturbed area must be stockpiled on site. Purpose: The purpose of perimeter protection is to reduce the amount of sediment transported beyond the disturbed areas of the construction site. Perimeter protection is primarily a backup means of sediment control. Most, if not all, sediment -laden water is to be treated in a sediment trap or pond. The only circumstances in which perimeter control is to be used as a primary means of sediment removal is when the catchment is very small (see below). When to Install: Perimeter protection is to be installed prior to any upslope clearing and grading. Measures to Use: The above measures may be used interchangeably and are not the only perimeter protection measures available. If surface water is collected by an interceptor dike or swale and routed to a sediment pond or trap, there may be no need for the perimeter protection measures specified in this section. Criteria for Use as Primary Treatment: At the boundary of a site, perimeter protection may be used as the sole form of treatment when the flowpath meets the criteria listed below. If these criteria are not met, perimeter protection shall only be used as a backup to a sediment trap or pond. Average Slope Slope Percent Flowpath Length 1.5H:1V or less 67% or less 100 feet 2H:1V or less 50% or less 115 feet 4H:1V or less 25% or less 150 feet 611:1V or less 16.7% or less 200 feet 1 OH:1V or less 10% or less 250 feet D.2.1.3.1 SILT FENCE Code: SF Symbol: X X X X X Purpose Use of a silt fence reduces the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Conditions of Use 1. Silt fence may be used downslope of all disturbed areas. 2. Silt fence is not intended to treat concentrated flows, nor is it intended to treat substantial amounts of overland flow. Any concentrated flows must be conveyed through the drainage system to a sediment trap or pond. The only circumstance in which overland flow may be treated solely by a silt fence, rather than by a sediment trap or pond, is when the area draining to the fence is small (see "Criteria for Use as Primary Treatment" in Section D.2.1.3 above). Design and Installation Specifications 1. See Figure D.2.1.3.A and Figure 13.2.1.3.13 for details. 2016 Surface Water Design Manual — Appendix D D-33 4/24/2016 SECTION D.2.1 ESC MEASURES 2. The geotextile used must meet the standards listed below. A copy of the manufacturer's fabric specifications must be available on site. AOS (ASTM D4751) 30-100 sieve size (0.60-0.15 mm) for slit film 50-100 sieve size (0.30-0.15 mm) for other fabrics Water Permittivity (ASTM D4491) 0.02 sec-1 minimum Grab Tensile Strength (ASTM D4632) (see Specification Note 3) 180 lbs. min. for extra strength fabric 100 lbs. min. for standard strength fabric Grab Tensile Elongation (ASTM D4632) 30% max. (woven) Ultraviolet Resistance (ASTM D4355) 70% min. 3. Standard strength fabric requires wire backing to increase the strength of the fence. Wire backing or closer post spacing may be required for extra strength fabric if field performance warrants a stronger fence. 4. Where the fence is installed, the slope shall be no steeper than 211:1V. 5. If a typical silt fence (per Figure D.2.1.3.A) is used, the standard 4 x 4 trench may not be reduced as long as the bottom 8 inches of the silt fence is well buried and secured in a trench that stabilizes the fence and does not allow water to bypass or undermine the silt fence. Maintenance Standards 1. Any damage shall be repaired immediately. 2. If concentrated flows are evident uphill of the fence, they must be intercepted and conveyed to a sediment trap or pond. 3. It is important to check the uphill side of the fence for signs of the fence clogging and acting as a barrier to flow and then causing channelization of flows parallel to the fence. If this occurs, replace the fence or remove the trapped sediment. 4. Sediment must be removed when the sediment is 6 inches high. 5. If the filter fabric (geotextile) has deteriorated due to ultraviolet breakdown, it shall be replaced. FIGURE D.2.I.3.A SILT FENCE JOINTS AT POSTS. USE STAPLES, WIRE RINGS OR EQUIVALENT TO ATTACH TO POSTS. Y 14 Ga. WIRE OR N�Naw.a.....aaaww. aW1 �.��wiaaiifWM EQUIVALENT, IF STANDARD iaa.. a. uf...u..f111 TRENGTH FABRIC USED �w araNa..u..00.. ."Kaaaaa.a..... iw aaawaawo..0 iw a "UMX. a. a IM l 6' MAX. MINIMUM 4"x4" TRENCH/� POST SPACING MAY BE N Ll INCREASED TO B' IF I BACKFILL TRENCH WITH NATIVE SOIL WIRE BACKING IS USED OR 3/4" TO 1-1/2" WASHED GRAVEL NOTE: FILTER FABRIC FENCES 2°x4" WOOD POSTS, STEEL FENCE SHALL BE INSTALLED ALONG POSTS, REBAR, OR EQUIVALENT CONTOURS WHENEVER POSSIBLE 4/24/2016 D-34 i J 2016 Surface Water Design Manual — Appendix D D.2.1.3 PERIMETER PROTECTION SILT FENCE FLOW FIGURE D.2.1.3.B SILT FENCE INSTALLATION BY SLICING O a a_ Z) U) 100% COMPACTION EACH SIDE NOTES: 1. POST SPACING: T MAX. ON OPEN RUNS 4' MAX. ON POOLING AREAS. 2. POST DEPTH: AS MUCH BELOW GROUND AS FABRIC ABOVE GROUND. 3. PONDING HEIGHT MAX. 24" ATTACH FABRIC TO UPSTREAM SIDE OF POST. 4. DRIVE OVER EACH SIDE OF SILT FENCE 2 TO 4 TIMES WITH DEVICE EXERTING 60 P.S.I. OR GREATER. 5. NO MORE THAN 24" OF A 36" FABRIC IS ALLOWED ABOVE GROUND. 6. VIBRATORY PLOW IS NOT ACCEPTABLE BECAUSE OF HORIZONTAL COMPACTION. OPERATION HORIZONTAL CHISEL POINT (76 mm WIDTH) 9— TOP OF FABRIC BELT TOP 8" GONAL ATTACHMENT DUBLES STRENGTH ATTACHMENT DETAILS: 1. GATHER FABRIC AT POSTS, IF NEEDED. 2. UTILIZE THREE TIES PER POST, ALL WITHIN TOP 8" OF FABRIC. 3. POSITION EACH TIE DIAGONALLY, PUNCTURING HOLES VERTICALLY A MINIMUM OF 1" APART. 4. HANG EACH TIE ON A POST NIPPLE AND TIGHTEN SECURELY. USE CABLE TIES (50 LBS) OF SOFT WIRE. ROLL OF SILT FENCE SILT FENCE INSTALLATION BY SLICING METHOD NTS 2016 Surface Water Design Manual — Appendix D D-35 PLOW � FABRIC ABOVE GROUND f 200-300mm r. �— j 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1.3.2 BRUSH BARRIER Code: BB Purpose The purpose of brush barriers is to reduce the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Conditions of Use 1. Brush barriers may be used downslope of all disturbed areas. 2. Brush barriers are not intended to treat concentrated flows, nor are they intended to treat substantial amounts of overland flow. Any concentrated flows must be conveyed through the drainage system to a sediment trap or pond. The only circumstance in which overland flow may be treated solely by a barrier, rather than by a sediment trap or pond, is when the area draining to the barrier is small (see "Criteria for Use as Primary Treatment" on page D-33). Design and Installation Specifications 1. See Figure D.2.1.3.0 for details. 2. King County may require filter fabric (geotextile) anchored over the brush berm to enhance the filtration ability of the barrier. ' Maintenance Standards 1. There shall be no signs of erosion or concentrated runoff under or around the barrier. If concentrated flows are bypassing the barrier, it must be expanded or augmented by toed -in filter fabric. 2. The dimensions of the barrier must be maintained. FIGURE D.2.1.3.0 BRUSH BARRIER IF REQUIRED, DRAPE FILTER FABRIC S MIN. OVER BRUSH AND SECURE IN 4"x4" MIN. TRENCH WITH COMPACTED BACKFILLI-N 2' MIN. HEIGHT ANCHOR DOWNHILL EDGE OF _ FILTER FABRIC WITH STAKES, SANDBAGS, OR EQUIVALENT MAX. 6" DIAMETER WOODY DEBRIS 1 FOR BARRIER CORE. ALTERNATIVELY D-36 TOPSOIL STRIPPINGS MAY BE USED TO FORM THE BARRIER. 2016 Surface Water Design Manual — Appendix D D.2.1.3 PERIMETER PROTECTION D.2.1.3.3 VEGETATED STRIP Code: VS Symbol: Purpose Vegetated strips reduce the transport of coarse sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Conditions of Use 1. Vegetated strips may be used downslope of all disturbed areas. 2. Vegetated strips are not intended to treat concentrated flows, nor are they intended to treat substantial amounts of overland flow. Any concentrated flows must be conveyed through the drainage system to a sediment trap or pond. The only circumstance in which overland flow may be treated solely by a strip, rather than by a sediment trap or pond, is when the area draining to the strip is small (see "Criteria for Use as Primary Treatment" on page D-33). Design and Installation Specifications 1. The vegetated strip shall consist of a 25-foot minimum width continuous strip of dense vegetation with a permeable topsoil. Grass -covered, landscaped areas are generally not adequate because the volume of sediment overwhelms the grass. Ideally, vegetated strips shall consist of undisturbed native growth with a well -developed soil that allows for infiltration of runoff. 2. The slope within the strip shall not exceed 4H:1V. 3. The uphill boundary of the vegetated strip shall be delineated with clearing limits as specified in Section D.2.1.1 (p. D-11). Maintenance Standards 1. Any areas damaged by erosion or construction activity shall be seeded immediately and protected by mulch. 2. If more than 5 feet of the original vegetated strip width has had vegetation removed or is being eroded, sod must be installed using the standards for installation found in Section D.2.1.2.7. If there are indications that concentrated flows are traveling across the buffer, surface water controls must be installed to reduce the flows entering the buffer, or additional perimeter protection must be installed. D.2.1.3.4 TRIANGULAR SILT DIKE (GEOTEXTILE ENCASED CHECK DAM) Code: TSD Symbol: Purpose Triangular silt dikes (TSDs) may be used as check dams, for perimeter protection, for temporary soil stockpile protection, for drop inlet protection, or as a temporary interceptor dike. Silt dikes, if attached to impervious surfaces with tack or other adhesive agent may also be used as temporary wheel wash areas, or concrete washout collection areas. 2016 Surface Water Design Manual — Appendix D D-37 4/24/2016 SECTION D.2.1 ESC MEASURES Conditions of Use 1. May be used for temporary check dams in ditches. 2. Maybe used on soil or pavement with adhesive or staples. 3. TSDs have been used to build temporary sediment ponds, diversion ditches, concrete washout facilities, curbing, water bars, level spreaders, and berms. l Design and Installation Specifications 1. TSDs must be made of urethane foam sewn into a woven geosynthetic fabric. 2. TSDs are triangular, 10 inches to 14 inches high in the center, with a 20-inch to 28-inch base. A 2- foot apron extends beyond both sides of the triangle along its standard section of 7 feet. A sleeve at one end allows attachment of additional sections as needed 3. Install TSDs with ends curved up to prevent water from flowing around the ends 4. Attach the TSDs and their fabric flaps to the ground with wire staples. Wire staples must be No. 11 gauge wire or stronger and shall be 200 min to 300 mm in length. 5. When multiple units are installed, the sleeve of fabric at the end of the unit shall overlap the abutting unit and be stapled. 6. TSDs must be located and installed as soon as construction will allow. 7. TSDs must be placed perpendicular to the flow of water. 8. When used as check dams, the leading edge must be secured with rocks, sandbags, or a small key slot and staples. 9. When used in grass -lined ditches and swales, the TSD check dams and accumulated sediment shall be removed when the grass has matured sufficiently to protect the ditch or swale unless the slope of the swale is greater than 4 percent. The area beneath the TSD check dams shall be seeded and mulched immediately after dam removal. Maintenance Standards 1. Triangular silt dikes shall be monitored for performance and sediment accumulation during and after each runoff producing rainfall event. Sediment shall be removed when it reaches one half the height of the silt dike. 2. Anticipate submergence and deposition above the triangular silt dike and erosion from high flows around the edges of the dike/dam. Immediately repair any damage or any undercutting of the dike/dam. D.2.1.3.5 COMPOST BERMS J 1 4/24/2016 Code: COBE Symbol: r Purpose Compost berms are an option to meet the requirements of perimeter protection. Compost berms may reduce the transport of sediment from a construction site by providing a temporary physical barrier to sediment and reducing the runoff velocities of overland flow. Compost berms trap sediment by filtering water passing through the berm and allowing water to pond, creating a settling area for solids behind the berm. Organic materials in the compost can also reduce concentrations of metals and petroleum hydrocarbons from construction runoff. Due to the increase in phosphorous seen in the effluent data from compost berms, they should be used with some cautions in areas that drain to phosphorus sensitive water 2016 Surface Water Design Manual — Appendix D D-38 D.2.1.3 PERIMETER PROTECTION bodies, and should only be used in Sensitive Lake watersheds, such as Lake Sammamish, with the approval from the County or the local jurisdiction. Conditions of Use 1. Compost berms may be used in most areas requiring sediment or erosion control where runoff is in the form of sheet flow or in areas where silt fence is normally considered acceptable. Compost berms may be used in areas where migration of aquatic life such as turtles and salamanders are impeded by 1, the use of silt fence. } 2. Compost berms are not intended to treat concentrated flows, nor are they intended to treat substantial amounts of overland flow. Any concentrated flows must be conveyed via a drainage system to a sediment pond or trap. 3. For purposes of long-term sediment control objectives, berms may be seeded at the time of installation j to create an additional vegetated filtering component. Design and Installation Specifications 1. Compost berms shall be applied using a pneumatic blower device or equivalent, to produce a uniform cross-section and berm density. 2. Compost berms shall be triangular in cross-section. The ratio of base to height dimensions shall be 2:1. 3. The minimum size of a compost berm is a 2-foot base with a 1-foot height. 4. Compost berms shall be sized and spaced as indicated in the table below. SLOPE SLOPE Maximum Slope Length or Berm Spacing (linear feet) Berm Size Required (height x base width) 0% - 2% Flatter than 50:1 250 1 ft x 2 ft 2%-10% 50:1-10:1 125 1ftx2ft 10%-20% 10:1-5:1 100 1ftx2ft 20%-33% 5:1-3:1 75 1ftx2ft 33% - 50% 3:1— 2:1 50 1.5 ft x 3 ft 5. Compost berms shall not be used on slopes greater than 2H:1 V. 6. Compost shall meet criteria in Reference 11-C of the SWDM except for the particle size distribution (see Bullet 8). `i 7. Compost shall be obtained from a supplier meeting the requirements in Reference 11-C. ij 8. Compost particle size distribution shall be as follows: 99% passing a 1 inch sieve, 90% passing a 3/4 inch sieve and a minimum of 70% greater than the 3/8 inch sieve. A total of 98% shall not exceed 3 inches in length. 9. Berms shall be placed on level contours to assist in dissipating flow into sheet flow rather than concentrated flows. Berms shall not be constructed to concentrate runoff or channel water. Sheet flow of water shall be perpendicular to the berm at impact. No concentrated flow shall be directed towards compost berms. J 10. Where possible, berms shall be placed 5 feet or more from the toe of slopes to allow space for sediment deposition and collection. 11. In order to prevent water from flowing around the ends of the berms, the ends of the berm shall be constructed pointing upslope so the ends are at a higher elevation than the rest of the berm. 2016 Surface Water Design Manual — Appendix D D-39 4/24/2016 SECTION D.2.1 ESC MEASURES 12. A compost blanket extending 10 -15 feet above the berm is recommended where the surface above the berm is rutted or uneven, to reduce concentrated flow and promote sheet flow into the berm. Maintenance Standards 1. Compost berms shall be regularly inspected to make sure they retain their shape and allow adequate flow -through of stormwater. 2. When construction is completed on site, the berms shall be dispersed for incorporation into the soil or left on top of the site for final seeding to occur. 3. Any damage to berms must be repaired immediately. Damage includes flattening, compacting, rills, - eroded areas due to overtopping. 4. If concentrated flows are evident uphill of the berm, the flows must be intercepted and conveyed to a sediment trap or pond. 5. The uphill side of the berm shall be inspected for signs of the berm clogging and acting as a barrier to flows and causing channelization of flows parallel to the berm. If this occurs, replace the berm or remove the trapped sediment. 6. Sediment that collects behind the berm must be removed when the sediment is more than 6 inches deep. D.2.1.3.6 COMPOST SOCKS C65• Code: COSO Symbol: Purpose Compost socks reduce the transport of sediment from a construction site by providing a temporary physical barrier to sediment -laden water and reducing the runoff velocities of overland flow. Compost socks trap sediment by filtering water that passes through the sock and allows water to pond behind the sock, creating a settling area for solids. Organic materials in the compost also may reduce metal and petroleum hydrocarbon concentrations in construction runoff. Compost socks function similarly to compost berms; however, because the compost is contained in a mesh tube, they are appropriate for both J concentrated flow and sheet flow. Compost socks may be used to channel concentrated flow on hard surfaces. Conditions of Use 1. Compost socks may be used in areas requiring sediment or erosion control where runoff is in the form of sheet flow or in areas that silt fence is normally considered acceptable. Compost socks may also be --� used in sensitive environmental areas where migration of aquatic life, including turtles, salamanders and other aquatic life may be impeded by the used of silt fence. 4/24/2016 i .J 2. Compost socks are not intended to treat substantial amounts of overland flow. However, compost socks may be subjected to some ponding and concentrated flows. If intended primarily as a filtration device, the socks should be sized and placed so that flows do not overtop the socks. 3. For purposes of long term sediment control objectives, compost socks may be seeded at the time of installation to create an additional vegetated filtering component. Design and Installation Specifications 1. Compost socks shall be produced using a pneumatic blower hose or equivalent to fill a mesh tube with compost to create a uniform cross-section and berm density. 2016 Surface Water Design Manual — Appendix D D-40 D.2.1.4 TRAFFIC AREA STABILIZATION 2. Socks shall be filled so they are firmly — packed yet flexible. Upon initial fiIIing, the socks shall be filled to have a round cross-section. Once placed on the ground, it is recommended to apply weight to the sock to improve contact with the underlying surface. This may cause the sock to assume an oval 1 shape. 1 3. Compost socks shall be a minimum of 8 inches in diameter. Larger diameter socks are recommended for areas where ponding is expected behind the sock. ^� 4. Compost socks shall not be used on slopes greater than 2H:IV. 5. Compost shall meet criteria in Reference I I-C of the SWDM, except for the particle size distribution (see Bullet 7). 6. Compost shall be obtained from a supplier meeting the requirements in Reference 11-C. 7. Compost particle size distribution shall be as follows: 99% passing a 1 inch sieve, 90% passing a 1/4 inch sieve and a minimum of 70%v greater than the 3/8 inch sieve. A total of 98% shall not exceed 3 inches in length. 8. In order to prevent water from flowing around the ends of compost socks, the ends must be pointed upslope so the ends of the socks are at a higher elevation than the remainder of the sock. Maintenance Standards I. Compost socks shall be regularly inspected to make sure the mesh tube remains undamaged, the socks retain their shape, and allow adequate flow through of surface water. If the mesh tube is torn, it shall be repaired using twine, zip -ties, or wire. Large sections of damaged socks must be replaced. Any damage must be repaired immediately upon discovery of damage. 2. When the sock is no longer needed, the socks shall be cut open and the compost dispersed to be incorporated into the soil or left on top of the soil for final seeding to occur. The mesh material must be disposed of properly as solid waste. If spills of Ail, antifreeze, hydraulic fluid, or other equipment fluids have occurred that have saturated the sock, the compost must be disposed of properly as a waste. 3. Sediment must be removed when sediment accumulations are within 3 inches of the top of the sock. D.2.1.4 TRAFFIC AREA STABILIZATION Unsurfaced entrances, roads, and parking areas used by construction traffic shall be stabilized to minimize erosion and tracking of sediment off site. Stabilized construction entrances shall be installed as the first step in clearing and grading. At the County's discretion, road and parking area stabilization is not required during the dry season (unless dust is a concern) or if the site is underlain by coarse -grained soils. Roads and parking areas shall be stabilized immediately after initial grading. Purpose: The purpose of traffic area stabilization is to reduce the amount of sediment transported off site by construction vehicles and to reduce the erosion of areas disturbed by vehicle traffic. Sediment transported off site onto paved streets is a significant problem because it is difficult to effectively remove, and any sediment not removed ends up in the drainage system. Additionally, sediment on public right-of- way can pose a serious traffic hazard. Construction road and parking area stabilization is important because the combination of wet soil and heavy equipment traffic typically forms a slurry of easily erodible mud. Finally, stabilization also is an excellent form of dust control in the summer months. When to Install: The construction entrance is to be installed as the first step in clearing and grading. Construction road stabilization shall occur immediately after initial grading of the construction roads and parking areas. Measures to Use: There are two types of traffic area stabilization: (1) a stabilized construction entrance and (2) construction road/parking area stabilization. Both measures must be used as specified under "Conditions of Use" for each measure. 2016 Surface Water Design Manual — Appendix D D-41 4/24/2016 SECTION D.2.1 ESC MEASURES D.2.1.4.1 STABILIZED CONSTRUCTION ENTRANCE Code: CE Symbol: Purpose Construction entrances are stabilized to reduce the amount of sediment transported onto paved roads by motor vehicles or runoff by constructing a stabilized pad of quarry spalls at entrances to construction sites. Conditions of Use Construction entrances shall be stabilized wherever traffic will be Ieaving a construction site and traveling on paved roads or other paved areas within 1,000 feet of the site. Access and exits shall be limited to one route if possible, or two for linear projects such as roadway where more than one accesslexit is necessary for maneuvering large equipment. For residential construction provide stabilized construction entrances for each residence in addition to the main subdivision entrance. Stabilized surfaces shall be of sufficient length/width to provide vehicle access/parking, based on lot size/configuration. Design and Installation Specifications I. See Figure D.2.1.4.A for details. 2. A separation geotextile shall be placed under the spalls to prevent fine sediment from pumping up into the rock pad. The geotextile shall meet the following= standards: Grab Tensile Strength (ASTM D4632) Grab Tensile Elongation (ASTM D4632) Puncture Strength (ASTM D6241) AOS (ASTM D4751) 200 Ibs min. 30% max.(woven) 495 Ibs min. 20-45 (U.S. standard sieve size) 3. Do not use crushed concrete, cement, or calcium chloride for construction entrance stabilization because these products raise pH levels in stormwater and concrete discharge to surface waters of the State is prohibited. 4- Hog fuel (wood based mulch) may be substituted for or combined with quarry spalls in areas that will not be used for permanent roads. The effectiveness of hog fuel is highly variable, but it has been used successfully on many sites. It generally requires more maintenance than quarry spalls. Hog fuel is not recommended for entrance stabilization in urban areas. The inspector may at any time require the use of quarry spalls if the hog fuel is not preventing sediment from being tracked onto pavement or if the hog fuel is being carried onto pavement. Hog fuel is prohibited in permanent roadbeds because organics in the subgrade soils cause difficulties with compaction. 5. Fencing (see Section D.2.1.1) shall be installed as necessary to restrict traffic to the construction entrance. 6. Whenever possible, the entrance shaII be constructed on a firm, compacted subgrade. This can substantially increase the effectiveness of the pad and reduce the need for maintenance. Maintenance Standards L Quarry spalls (or hog fuel) shall be added if the pad is no longer in accordance with the specifications. 4/24/2016 D-42 2016 Surface Water Design Manual — Appendix D D.2.1.4 TRAFFIC AREA STABILIZATION -t 2. If the entrance is not preventing sediment from being tracked onto pavement, then alternative measures to keep the streets free of sediment shall be used. This may include street sweeping, an increase in the dimensions of the entrance, or the installation of a wheel wash. If washing is used, it shall be done on an area covered with crushed rock, and wash water shall drain to a sediment trap or pond. 3. Any sediment that is tracked onto pavement shall be removed immediately by sweeping. The sediment collected by sweeping shall be removed or stabilized on site. The pavement shall not be cleaned by washing down the street, except when sweeping is ineffective and there is a threat to public safety. If it is necessary to wash the streets, a small sump must be constructed. The sediment would then be washed into the sump where it can be controlled. Wash water must be pumped back onto the site and cannot discharge to systems tributary to surface waters. 4. Any quarry spalls that are loosened from the pad and end up on the roadway shall be removed immediately. 5. If vehicles are entering or exiting the site at points other than the construction entrance(s), fencing (see Section D.2.1.1) shall be installed to control traffic. OpO <*C r R =25' MIN. _1 IF A ROADSIDE DITCH IS PRESENT, INSTALL DRIVEWAY CULVERT PER KCRDCS 4"- 8" QUARRY SPALLS GEOTEXTILE 12" MIN. THICKNESS 4.1 PROVIDE FULL WIDTH OF INGRESS/EGRESS AREA NOTES: PER KING COUNTY ROAD DESIGN AND CONSTRUCTION STANDARDS (KCRDCS), DRIVEWAYS SHALL BE PAVED TO EDGE OF R-O-W PRIOR TO INSTALLATION OF THE CONSTRUCTION ENTRANCE TO AVOID DAMAGING OF THE ROADWAY. IT IS RECOMMENDED THAT THE ENTRANCE BE CROWNED SO THAT RUNOFF DRAINS OFF THE PAD. 2016 Surface Water Design Manual — Appendix D { D-43 J 4/24/2016 D.2.1.4 TRAFFIC AREA STABILIZATION D.2.1.4.3 WHEEL WASH Code: WW Symbol: f� Purpose Wheel wash systems reduce the amount of sediment transported onto paved roadways and into surface water systems by construction vehicles. Conditions of Use When a stabilized construction entrance is not preventing sediment from being tracked onto pavement: • Wheel washing is generally an effective erosion and sediment control method and BMP when installed with careful attention to topography. For example, a wheel wash can be detrimental if installed at the top of a slope abutting a right-of-way where the water from the dripping truck wheels and undercarriage can run unimpeded into the street. • Pressure washing combined with an adequately sized and properly surfaced wash pad with direct drainage discharge to a large 10 foot x 10-foot sump can be very effective. Design and Installation Specifications A suggested detail is shown in Figure D.2.1.4.B. } 1. A minimum of 6inches of asphalt treated base (ATB) over crushed base material or 8 inches over a l good subgrade is recommended to pave the wheel wash area. 2. Use a low clearance truck to test the wheel wash before paving. Either a belly dump or lowboy will work well to test clearance. 3. Keep the water level from 12 to 14 inches deep to avoid damage to truck hubs and filling the truck 1 tongues with water. JI 4. Midpoint spray nozzles are only needed in very muddy conditions. 5. Wheel wash systems should be designed with a small grade change, 6 to 12 inches for a 10-foot wide pond, to allow sediment to flow to the low side of the pond and to help prevent re -suspension of sediment. 1 6. A drainpipe with a 2 to 3 foot riser should be installed on the low side of the wheel wash pond to } allow for easy cleaning and refilling. Polymers may be used to promote coagulation and flocculation —J in a closed -loop system. 7. Polyacrylamide (PAM) added to the wheel washwater at a rate of 0.25 — 0.5 pounds per 1,000 gallons of water increases effectiveness and reduces cleanup time. If PAM is already being used for dust or erosion control and is being applied by a water truck, the same truck may be used to change the washwater. Maintenance Standards 1. The wheel wash should start out each day with clean, fresh water. 2. The washwater should be changed a minimum of once per day. On large earthwork jobs where more than 10-20 trucks per hour are expected, the washwater will need to be changed more often. 3. Wheel wash or tire bath wastewater shall be discharged to a separate on -site treatment system, such as a closed -loop recirculation system or land application, or to the sanitary sewer system with proper local sewer district approval or permits. 2016 Surface Water Design Manual — Appendix D D-45 4/24/2016 SECTION D.2.1 ESC MEASURES FIGURE D.1.1.4.R WHEEL WASH A..'VD PAVED CONSTRUCTION ENTRANCE 6" SEWER PIPE WITH BUTTERFLY VALVES 8'x8' SUMP WITH 5' OF CATCH 3" TRASH PUMP WITH FLOATS A ON SUCTION HOSE 2" SCHEDULE 40 1 1-1/2" SCHEDULE 40 2% 5:1 5:1 SLOPE SLOPE SLOPE 1:1 SLOPE Y A 1 L 15' ATB APRON TO PROTECT BALL VALVES GROUND FROM SPLASHING WATER 6" SLEEVE UNDER ROAD PLAN VIEW NTS FOR SPRAYERS MIDPOINT SPRAY NOZZLES, IF NEEDED 2% SLOPE 6" ATB CONSTRUCTION ENTRANCE ASPHALT CURB ON THE LOW ROAD SIDE TO DIRECT WATER BACK TO POND 15' 15' 20' 15' 50' CURB 6" SLEEVE ELEVATION VIEW NTS LOCATE INVERT OF TOP PIPE V ABOVE BOTTOM OF WHEEL WASH 8'x8' SUMP, SEE NOTE _ 18' WATER LEVEL 1� 3' I 5' 12' I DRAIN PIPE NOTE: BUILD 8'x8' SUMP TO ACCOMODATE CLEANING BY TRACKHOE. 4/24/2016 SECTION A -A NTS 1-1 SLOPE 2016 Surface Water Design Manual — Appendix D D-46 D.2.1.5 SEDIMENT RETENTION D.2.1.5.3 STORM DRAIN INLET PROTECTION Code: FFP or CBI or CBP Symbol: FP or II II or 7T Purpose Storm drain inlets are protected to prevent coarse sediment from entering storm drainage systems. s Temporary devices around storm drains assist in improving the quality of water discharged to inlets or catch basins by ponding sediment -laden water. These devices are effective only for relatively small drainage areas. i Conditions of Use _1 1. Protection shall be provided for all storm drain inlets downslope and within 500 feet of a disturbed or j construction area, unless the runoff that enters the catch basin will be conveyed to a sediment pond or trap. 2. Inlet protection may be used anywhere at the applicant's discretion to protect the drainage system. This will, however, require more maintenance, and it is highly likely that the drainage system will still require some cleaning. j3. The contributing drainage area must not be larger than one acre. J Design and Installation Specifications 1. There are many options for protecting storm drain inlets. Two commonly used options are filter fabric protection and catch basin inserts. Filter fabric protection (see Figure D.2.1.5.E) is filter fabric (geotextile) placed over the grate. This method is generally very ineffective and requires intense maintenance efforts. Catch basin inserts (see Figure D.2.1.5.F) are manufactured devices that nest JI inside a catch basin. This method also requires a high frequency of maintenance to be effective. Both 2016 Surface Water Design Manual — Appendix D 4/24/2016 1 D-53 1 SECTION D.2.1 ESC MEASURES I options provide adequate protection, but filter fabric is likely to result in ponding of water above the I catch basin, while the insert will not. Thus, filter fabric is only allowed where ponding will not be a traffic concern and where slope erosion will not result if the curb is overtopped by ponded water. Trapping sediment in the catch basins is unlikely to improve the water quality of runoff if it is treated in a pond or trap because the coarse particles that are trapped at the catch basin settle out very quickly in the pond or trap. Catch basin protection normally only improves water quality where there is no treatment facility downstream. In these circumstances, catch basin protection is an important last line of defense. It is not, however, a substitute for preventing erosion. The placement of filter fabric under grates is generally prohibited and the use of filter fabric over grates is strictly limited and discouraged. 2. It is sometimes possible to construct a small sump around the catch basin before final surfacing of the road. This is allowed because it can be a very effective method of sediment control. 3. Block and gravel filters, gravel and wire mesh filter barriers, and bag barriers filled with various filtering media placed around catch basins can be effective when the drainage area is 1 acre or less and flows do not exceed 0.5 cfs. It is necessary to allow for overtopping to prevent flooding. Many manufacturers have various inlet protection filters that are very effective in keeping sediment -laden water from entering the storm drainage system. The following are examples of a few common methods. a) Block and gravel filters (Figure D.2.1.5.G) are a barrier formed around an inlet with standard concrete block and gravel, installed as follows: ■ Height is 1 to 2 feet above the inlet. • Recess the first row of blocks 2 inches into the ground for stability. • Support subsequent rows by placing a 2x4 through the concrete block opening. ■ Do not use mortar. • Lay some blocks in the bottom row on their side for dewatering the pooled water. • Place cloth or mesh with''/2 inch openings over all block openings. • Place gravel below the top of blocks on slopes of 2:1 or flatter. • An alternate design is a gravel donut. b) Gravel and wire mesh filters consist of a gravel barrier placed over the top of an inlet. This structure generally does not provide overflow. Install as follows: • Cloth or comparable wire mesh with 1/ inch openings is placed over inlet. • Coarse aggregate covers the cloth or mesh. • Height/depth of gravel should be 1 foot or more, 18 inches wider than inlet on all sides. c) Curb inlet protection with a wooden weir is a barrier formed around an inlet with a wooden frame and gravel, installed as follows: • Construct a frame and attach wire mesh (% inch openings) and filter fabric to the frame. 4 ■ Pile coarse washed aggregate against the wire/fabric. ■ Place weight on frame anchors. d) Curb and gutter sediment barriers (Figure D.2.1.5.11) consist of sandbags or rock berms (riprap and aggregate) 3 feet high and 3 feet wide in a horseshoe shape, installed as follows: • Bags of either burlap or woven geotextile fabric, filled with a variety of media such as gravel, wood chips, compost or sand stacked tightly allows water to pond and allows sediment to separate from runoff. 2016 Surface Water Design Manual — Appendix D D-54 D.2.1.5 SEDIMENT RETENTION • Leave a 'one bag gap" in the top row of the barrier to provide a spillway for overflow. • Construct a horseshoe shaped berm, faced with coarse aggregate if using riprap, 3 x 3 and at least 2 feet from the inlet. J1, • Construct a horseshoe shaped sedimentation trap on the outside of the berm to sediment trap standards for protecting a culvert inlet. 4. Excavated drop inlet sediment traps are appropriate where relatively heavy flows are expected and overflow capability is needed. If emergency overflow is provided, additional end -of -pipe treatment may be required. Excavated drop inlets consist of an excavated impoundment area around a storm drain. Sediment settles out of the stormwater prior to enter the drain. Install according to the following specifications: a) The impoundment area should have a depth of 1 - 2 feet measured from the crest of the inlet structure. b) Side slopes of the excavated area must be no steeper than 2:1. c) Minimum volume of the excavated area should be 35 cubic yards. d) Install provisions for draining the area to prevent standing water problems. e) Keep the area clear of debris. f) Weep holes may be drilled into the side of the inlet. g) Protect weep holes with wire mesh and washed aggregate. h) Weep holes must be sealed when removing and stabilizing excavated area. i) A temporary dike may be necessary on the down slope side of the structure to prevent bypass flow. Maintenance Standards 1. 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. 2. Any sediment in the catch basin insert shall be removed when the sediment has filled one-third of the available storage. The filter media for the insert shall be cleaned or replaced at least monthly. 4 3. Regular maintenance is critical for all forms of catch basin/inlet protection. Unlike many forms of protection that fail gradually, catch basin protection will fail suddenly and completely if not maintained properly. -1 2016 Surface Water Design Manual — Appendix D D-55 4/24/2016 SECTION D.2.1 ESC MEASURES FIGURE D.2.1.5.E FILTER FABRIC PROTECTION STANDARD STRENGTH FILTER FABRIC GRATE %��I NOTE: ONLY TO BE USED WHERE PONDING OF WATER ABOVE THE A r o r ° \\ CATCH BASIN—� 'r\ / CATCH BASIN WILL NOT CAUSE TRAFFIC PROBLEM OVERFLOW 5 AND WHERE WILL NOT RESULT IN EROSION OF SLOPES. FIGURE D.2.1,5.F CATCH BASIN INSERT CATCH BASIN --- GRATE �,r— SOLID a THIS DETAIL IS ONLY WALLS f OVERFLOW \j /�� X SCHEMATIC. ANY INSERT IS ALLOWED THAT HAS: FILTER I \�j� ■ A MIN. 0.5 C.F. OF STORAGE, • THE MEANS MEDIA FOR DEWATERING�f tip\ \�f1 TO DEWATER THE 570RE>] SEDIMENT, \f/ • AN OVERFLOW, AND • CAN BE EASILY MAINTAINED. POROUS BOTTOM \�f 4/24/2016 D-56 2016 Surface Water Design Manual — Appendix D D.2.1.5 SEDIMENT RETENTION FIGURE D.2.1.5.G BLOCK AND GRAVEL CURB INLET PROTECTION BACK OF SfT1FIAiei v _ CURB FAC 3/4" DRAI GRAVELI WI FILTER FABRICv ` 3/4" DRAIN GRAVEL (20 mm) POND HEIGHT WATER WIRE SCREEN OR FILTER FABRIC 2x4 WOOD STUD (100x50 TIMBER STUD) PLAN NTS .OVERFLOW J i ❑ r CURB INLET CATCH BASIN SECTION A -A NTS - - _ . - linJ CATCH BASIN COVER NOTES: I. USE BLOCK AND GRAVEL TYPE SEDIMENT BARRIER WHEN CURB INLET IS LOCATED IN GENTLY SLOPING SEGMENT, WHERE WATER CAN POND AND ALLOW SEDIMENT TO SEPARATE FROM RUNOFF. 2. BARRIER SHALL ALLOW FOR OVERFLOW FROM SEVERE STORM EVENT. 3. INSPECT BARRIERS AND REMOVE SEDIMENT AFTER EACH STORM EVENT, SEDIMENT AND GRAVEL MUST BE REMOVED FROM THE TRAVELED WAY IMMEDIATELY. BLOCK AND GRAVEL CURB INLET PROTECTION NTS 2016 Surface Water Design Manual — Appendix D D-57 4/24/2016 SECTION D.2.1 ESC MEASURES 4/24/2016 $IGM R:i. i.SM CAM AND M- JIM SARRIER �' ; a C.TION RUNOFF RUNOFF BACK OF SIDEWALK SANDBAGS TO OVERLAP ONTO CURB GRAVEL FILLED SANDBAGS STACKED TIGHTLY PLAN VIEW NTS CURB INLET DRAIN GRATE �— CURB FA CE GUTTER NOTES: 1 • PLACE CURB —TYPE SEDIMENT BARRIERS ON GENTLY SLOPING STREET SEGMENTS, WHERE WATER CAN POND AND ALLOW SEDIMENT TO SEPARATE FROM RUNOFF. 2. SANDBAGS OF EITHER BURLAP OR WOVEN GEOTEXTILE FABRIC ARE FILLED WITH GRAVEL, LAYERED AND PACKED TIGHTLY. 3. LEAVE A ONE —SANDBAG GAP IN THE TOP ROW TO PROVIDE A SPILLWAY FOR OVERFLOW. 4. INSPECT BARRIERS AND REMOVE SEDIMENT AFTER EACH STORM EVENT. SEDIMENT AND GRAVEL MUST BE REMOVED FROM THE TRAVELED WAY IMMEDIATELY. CURB AND GUTTER BARRIER NTS D-58 2016 Surface Water Design Manual — Appendix D D.2.1.8 DUST CONTROL D.2.1.8 DUST CONTROL Preventative measures to minimize the wind transport of soil shall be taken when a traffic hazard may be created or when sediment transported by wind is likely to be deposited in water resources or adjacent properties. Purpose: To prevent wind transport of dust from exposed soil surfaces onto roadways, drainage ways, and surface waters, When to InstaiI: Dust control shall be implemented when exposed soils are dry to the point that wind control measures may consist of chemical, transport is possible and roadways, drainage ways, or surface waters are likely to be impacted. Dust structural, or mechanical methods. Measures to Install: Water is the most common dust control (or palliative) used in the area. When using water for dust control, the exposed soils shall be sprayed until wet, but runoff shad not be generated by spraying. Calcium chloride, Magnesium chloride, Lignin derivatives, Tree Resin Emulsions, and needed. Oil shall not be used for dust control. The following Synthetic Polymer Emulsions may also be used for dust control. Exposed areas shall be re Synthetic as table lists many common dust control measures. Some of the measures are not recommended for use in King County and must have prior approval prior to use from the DPER inspector assigned to specific projects. 2016 Surface Water Design Manual — Appendix D D-69 4/24/2016 SECTION D.2.1 ESC MEASURES TABLE D.2.1.8.A DUST CONTROL MEASURES METHOD CONSIDERATIONS SITE PREPARATION RECOMMENDED Water -Most commonly used practice For all liquid agents: APPLICATION RATE -Evaporates quickly -Lasts less than 1 day -Blade a small surface 0.125 gal/sq yd every 20 to 30 minutes -Crown or slope surface to avoid ponding -Compact soils if needed -Uniformly pre -wet at 0.03 — 0.3 gal/sq yd -Apply solution under pressure. Overlap solution 6 — 12 inches -Allow treated area to cure 0 — 4 hours -Compact area after curing -Apply second treatment before first Salts -Restricts evaporation treatment becomes ineffective Calcium Chloride -Lasts 6-12 months -Can be corrosive FApply 38°/0 solution at 1 Um2 (0.27 gal/yd2) -Less effective in low humidity as loose dry granules Magnesium -Can build u in soils and leach b rain -Restricts evaporation per manufacturer Chloride (MgCl) -Works at higher temperatures and lower humidity Apply 26 — 32°/a solution than CaCI at 2.3 Um2 (0.5 Sodium -Ma be more costl than CaCI -Effective over smaller range of gal/yd2) Chloride conditions Per Manufacturer (NaCl) -Less expensive -Can be corrosive -Less effective in low humidi Silicates -Generally expensive -Available in small quantities Surfactants -Re wire Second a fication -High evaporation rates -Effective for short time periods Copolymers -Must a ily fre uentl -Forms semi -permeable transparent crust 750 — 940 L/ha (80 - -Resists ultraviolet radiation and 100 gal/ac) moisture induced breakdown Petroleum -Last 1 to 2 ears -Used oil is prohibited as a dust control Products method Use 57 — 63% resins as -Bind soil particles base. Apply at 750 - -May hinder foliage growth 940 L/ha (80-1 oo -Environmental and aesthetic concerns gal/ac) -Hi her cost Lignin -Paper industry waste product Sulfonate -Acts as dispersing agent Loosen surface 25-50 -Best in dry climates mm (1 — 2 inches) Need -Can be slippery 4-8% fines -Will decrease Dissolved Oxygen in waterways therefore cannot be used ad'acent to surface water s sterns Vegetable -Coat grains of soils, so limited binding Oils ability Per Manufacturer -May become brittle -Limited availabili Spray on -Available as organic or synthetic Adhesives -Effective on dry, hard soils Per Manufacturer -Forms a crust -Can last 3 to 4 vears 4/24/2016 D-70 2016 Surface Water Design Manual — Appendix D l Section 9 Bond Quantities, Facilities Declarations of Covenant Technical Information Report Grind and Overlay 2180930.10 Summaries, and 1310193 9.0 Bond Quantities, Facilities Summaries, and Declarations of Covenant If required, documentation will be provided to establish the appropriate project bond (or other financial guarantee) amount. No new stormwater facilities are proposed for this project. This project will utilize existing stormwater facilities and as such a stormwater summary sheet and sketch have not been provided. A declaration of covenant will not be required because City of Federal Way will own and maintain all onsite stormwater management facilities. Technical Information Report Grind and Overlay 2180930.10 OCIGIN Section 70 Operations and Maintenance Plan Technical Infarma;ion Report Grind and Overiay 2180930.10 130015 I 10.0 Operations and Maintena nce Plan The City of Federal Way will own and operate all onsite stormwater facilities. An Operations and f Maintenance Plan will not be required because the City of Federal Way will be responsible for operation and maintenance of onsite stofmwater facilities. Technical Information Report Grind and Overlay 2180930.10 10-1 00O0 Section 7 I Conclusion Technical Information Report Grind and OVeNaV 2180930.10 alf,glarm ^� 11.0 Conclusion This site was designed to meet the 2016 King County Surface Water Design Manual (KCSWDM). The site utilizes the existing conveyance system manage stormwater generated from the site. This analysis is based on data and records either supplied to or obtained by AHBL. These documents ^� are referenced within the text of the analysis. The analysis was prepared using procedures and practices within the standard accepted practices of the industry. We conclude that this project, as schematically represented, will not create any new problems within the downstream drainage system, This project will not noticeably aggravate any existing downstream problems due to either water quality or quantity. AHBL, Inc. William Thompson, EIT Project Engineer July 2019 1 Q:1201812180930\10_CMNON_CADIREPORTSIRpt (TIR) 2180930.10.docx Technical Information Report Grind and Overlay