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Home My WebLink AboutD-344003/7 C ITRA ACCESP o C'O' D S AN TAGING AREAS cr) 10 NO. 31230�90DI'\ CL N CLEARING LiMr*D n GRAVC. G, SURFACINI sl_,� V, ASPHALT v, LAT T) PAVEMEN PID 110 7616OF 20, I-- CONSTRUC11ON EASEMENT (TYI O'DEC; 7 15, PE EASEVEN, 'M R "'C cc e 58 )9278 BfA I SEY I WAS �FNI - CIO I RM.1- 75,a5 W m "I , " IE 20"Vi GQ OR M, 31: 1- i2 - E 12,' �,IT(S tz C! 1 LH- 1,a, r"o PE EASEM� _—p.-_c_; 5845M CLEARING IJMiTS-- t: T RfiARY EMPO /'CONSTRUCTION .... .. EASEMENT,., it) f -0, 81358'9 D_Ij . .. . .... . . ...... PLAN SCALE: l'-2D' I G, �I\D I DEG 4 END �xpol Di RIK 1756 3 < CONSTRUCTION NOTES: (D CONTRACTOR TO INSTALL TEMPORARY CREEK 13YPASS SYSTEM, BYPASS SYSTEM SHOWN ON THIS DRAWING IS SCHEMATIC AND CONTRACTOR SHALL SUBMIT 13YPASS PLAN IN ACCORDANCE WITH THE SPECIFICATIONS FOR APPROVAL BY THE CITY. LOCATE PIPE AND COFFER DAMS TO ALLOW FOR CONSTRUCTION OF OTHER ;MPROVEMENTS INCLUDING HEADWALL, BOULDER CASCADE AND CULVERT BAFFLES. UPON COMPLETION OF PROJECT, ALL MATERIAL USED FOR THE TEMPORARY BYPASS SHALL BE REMOVED FROM THE SITE AND THE SITE RESTORED TO PRE-PROJECT CONDITIONS. AT A MINIMUM CREEK BYPASS SHALL BE W/24" DIAMETER BUTT-FUSED HOPE PIPE. THE SECTION UPSTREAM AND OUTSIDE OF THE EXISTING CULVERT SHALL BE 36" OtA AT MIN. 2% SLOPE AND SHALL RAVE A MITERED INLET. 36' PIPE SHALL TRANSITION TO 240 DIA USING SPECIALLY MADE FUTING THAT MATCHES INVERTS. 240 PIPE SHALL BE SUPPORTED WITHIN EXISTING CULVERT USING CONTRACTOR-DESIGNEO SYSTEM. BYPASS PIPE SHALL EXTEND FAR ENOUGH OOWNSTRF)M TO ELIMINATE NEED FOR A DOWNSTREAM COFFER DAM AND SHALL EXTEND FAR ENOUGH THAT OUTLET ELEVATION IS A MINIMUM OF 2 VERTHA FEET BELOW WORK AREA. ELEVATION OF INLEF SRALL BE 152.5 FT. PROVIDE SAND OR GRAVEL-FILLEO BAG COFFI]i DAM SYSTEM TO ELEVATION 156.5 FT ON UPSTREAM SIDE OF CULVERT, COFFER DAM SYSTEM TO BE CONTRACTOR-DESIGNED TO WITHSTAND ANTICIPATED HYDROSTATIC FORCES AND WITHSTAND OVERTOPPING. ALSO SEE GENERAL NOTE 1. CONNECT 12' TEMPORARY STORM DRAIN TO EXISTING 12" CMP AND DIRECT FLOW TO UPSTREAM SIDE OF COFFER OAM. INSTALL CATCH BASIN INSERTS (4) AT FIRST CB WEST AND EAST OF CULVERT. SEE DETAIL I ON DWG C3. EXCAVATE SUMP AT LOW POINT WHERE FLOMi EXIT EXISTING CULVERT. LINE SUMP WITH PLASTIC. DIRECT ANY CONTAMINATED CONSTRUCTION WATER/SEEPAGE (E.G., AFTER SAND BLASTING OPERATIONS OR CONCRErE WORK) DISCHARGING FROM CULVERT TO SUMP AND PUMP TO HOLDING TANK FOR HAUL TO DISPOSAL SITE UPON REMOVAL OF EXISTING DAMAGED CULVERT SECTION, RELOCATE LINED SUMP TO CAPTURE CULVERT SEEPAGE AT NEW OUTUET LOCATION. INSTALL TEMPORARY SILT FENCE ACROSS CREEK BOTTOM AND AT TOP OF CHANNEL BANKS ALONG CREEK, SEE DETAIL :2 ON DWG C2. AS CONSTRUCTION PROCEEDS, RELOCATE SILT FENCE WHEN NECESSARY AND AS DIRECTED 13Y ENGINEER. INSTALL SUMP AND PUMP SYSTEM TO COLLECT ANY LEAKAGE FROM COFFERDAM AND PUMP TO UPSTREAM SIDE OF COFFERDAM. SUMP TO BE M NIMUM OF 3 FT DEEP, WITH PERF PIPE AND BACKnLLEo WITH WASHED ROCK. CONTRACTOR MAY USE EXISTING PAVED AREAS WITHIN EASEMENT FOR ACCESS AND STAGING. ANY ADDITIONAL STAGING AREA NEEDED SHALL BE CONTRACTOR OBTAINED. 100 CLEARING LIMITS TO CULVERT INLET IS FOR TEMPORARY ACCESS AND INSTALLATION OF TESC FEATURES. NOTE AN ENSTING CMP HALF-PIPE IN THIS AREA WILL NEED TO BE RESTORED IF DISTURBED. A LARGE CLEARING LIMITS AREA IS PROVIDED IN THIS AREA TO PROVIDE CONTRACTOR Fl EXIBILITY IN SELECTING MAIN POINT OF ACCESS TO WORK AREA. ONCE MAIN POINT OF ACCESS IS SELECTED, CONTRACTOR TO REDUCE CLEARING LIMITS TO EXTENT PIRACTICAL GENERAL NOTES: 1. BYPASS SYSTEM IS SIZED TO PASS MODERATE TO HEAVY FALL STORMS WED ON 2 YEARS OF GAGED FLOW. CONTRACTOR SHALL MAINTAIN SUFFICIENT i I MATERIALS ON SITE TO RAISE HEIGHT OF COFFER OAM 1.5 FT IN CASE OF LARGE STORM EVENT. PACE AS SHOWN AS 0 100% SUBMITTAL — SL DATL I — — JCB NO. REVISION APPIR TESC NOTES: 1. TIHE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE. REPLACEMENT, AND UPGRADiNG OF THESE ESC FACILITIES IS THE RESPONSIBILITY OF THE CONTRACTOR UNTIL ALL CONSTRUCTION IS APPROVED. 2. THE BOUNDARIES OF THE CONSTRUCTION LIMITS SHOWN ON THIS PLAN S14ALL BE CLEARLY FLAGGED BY THE CONTRACTOR USING YELLOW CONSTRUCTION TAPE WITH 20W WOODEN STAKES SPACED AT 20' MAXIMUM PRIOR TO CONSTRUCTION. ELECTRONIC FILES WILL BE PROVIDED TO THE CONTRACTOR FOR LOCATION OF THE LIMITS. DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE CONSTRUCTION UMITS SHALL BE PERMITTED. THE CONSTRUCTION LIMITS SHALL BE MAINTANED BY THE CONTRACTOR FOR THE DURATION OF CONSTRUCTION. LARGE WOODY DEBRIS MAY BE PLACED OUTSIDE THE CONSTRUCTION LIMITS. 3. THE ESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING SO AS TO ENSURE THAT THE TRANSPORT OF SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, AND ADJACENT PROPERTIES IS MINIMIZED- 4. THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE ESC FACILITIES SHALL BE UPGRADED AS NEEDED FOR CONSTRUCTION SEQUENCING AND UNEXPECTED STORM EVENTS AND SHALL BE MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G., ADDITIONAL SUMP PUMPS, RELOCATION OF DITCHES AND SILT FENCES, ErC.). 5. THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING. WRITTEN RECORDS SHALL BE KEPT OF WEEKLY REVIEWS OF THE ESC FACILITIES. DAMAGED OR IMPROPERLY FUNCTIONING EIMPS SHALL BE REPLACED AT NO ADDITIONAL COST TO THE CITY. 6. ANY AREAS OF D(POSED SOILS THAT WILL NOT BE DISTURBED FOR TWO DAYS SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED ESC METHODS (E.G., SEED'NG, MULCHNG, PLASTIC COVERING, ETC.). 7. AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHN A CATCH BASIN. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT-LAOEN WATER INTO THE DOWNSTREAM SYSTEM. B. WHERE STRAW MULCH FOR TEMPORARY EROSION CONTROL 15 REQUIRED, IT SHALL BE APPLIED AT A MINIMUM THICKNESS OF 2 TO 3 INCHES. 9. USE REINFORCED PLASTIC FABRIC TO COVER STOCKPILED ITEMS WHEN NOT IN USE. THE REINFORCED PLASTIC FABRIC SHALL BE HELD DOWN BY A MINIMUM OF 10LB SANDBAGS PLACED EVERY 1D FEEr ALONG THE EDGE AND ACROSS THE PILE. 10. IN ACCORDANCE WITH THE DEPARTMENT OF ECOLOGY REQUIREMENTS, WASTEWATER FROM CEMENT CONCRETE, MASONRY, ASPHALT CONCRETE CUTTING OR POURING OPERATIONS, PETROLEUM PRODUCTS, HYDRAULIC FLUID, SEOIMENT-LADEN WATER, CHEMICALS, OR ANY OTHER TOXIC OR DELETERIOUS MATERIAL SHALL NOT BE ALLOWED TO ENTER OR SEP INTO STORM DRAANAGE SYSTEMS OR SURFACE WATERS. ANY WASTAGE OR WATER COMING IN CONTACT WITH FRESH CONCRETE SHALL BE COLLECTED IN AN IMPERVIOUS SUMP FOR COMPLIETE REMOVAL AND DISPOSAL TO PREVENT CONTAMINANTS FROM ENTERING GROUND OR SURFACE WATERS. 11. CONTRACTOR SHALL COMPLY WITH ALL APPROVED LOCAL STATE AND FEDERAI - REQUIREMENTS FOR PROTECTION OF WATER QUALITY. SEE PROJECT SPECIFICATIONS FOR COPIES OF PROJECT PERMITS. A COPY OF THE APPROVED HYDRAULIC PROJECT APPROVAL (HPA) SHALL BE KEPT IN A VISIBLE LOCATION. ALL WORK BELOW THE ORDINARY HIGH WATER LINE (OHWL) SHALL BE BEWEN JUNE 15, 2008 AND OCTOBER 15, 2008. 12. CONTRACTOR SHALL CAPTURE AND SAFELY REMOVE AND RELOCATE FISH WITHIN THE TEMPORARY DIVERSION AREA IN ACCORDANCE WITH THE HPA REQUIREMENTS. PRIOR TO INSTALLING TEMPORARY BYPASS, CONTRACTOR SHALL OBTAIN A WASHINGTON DEPARTMENT OF FISH AND WILDLIFE (WDFW) SCIENTIFIC COLLECTING PERMIT PER SPEC SECTION 1-07.6 AND INSTALL FISH BLOCK NETS AND HAND NET FISH FROM WORK AREA PER PERMIT REQUIREMENTS. CONTRACTOR SHALL HAVE A QUALIAEO BIOLOGIST CAPTURE AND SAFELY MOVE FOOD FISH, GAME FISH, AND OTHER FISH LIFE FROM THE JOB SITE. CONTRACTOR SHALL HAVE FISH CAPTURE AND TRANSPORTATION EQUIPMENT READY AND ON THE JOB SITE. CAPTURED FISH SHALL BE IMMEDIATELY AND SAFELY TRANSFERRED TO FREE-FLOWING WATER DOWNSTREAM OF THE PROJECT SITE. CITY OF RENTON Planning/Building/Public Works Dapt. 20 0 20 40 1"=20'-V I — — - Scale Feet CARR ROAD - PANTHER CREEK EMERGENCY CULVERT REPAIR PROJECT TEMPORARY EROSION AND SEDIMENT CONTROL C 1 3 '8