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HomeMy WebLinkAboutR-377103N Co O O r N W Q 2 I H a:O z s w z EROSION CONTROL NOTES A PORTION OF THE NW 1/4, SE 1/4, SECTION 9, TOWNSHIP 23 N., RANGE 5 EAST, W.M., CITY OF RENTON, WASHINGTON 1. THESE NOTES SHALL APPEAR FOR PROJECTS - SITE IMPROVEMENTS, SURFACE WATER UTILITY, WASTEWATER UTILITY, WATER UTILITY, AND TRANSPORTATION PLANS: 2. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON, PUBLIC WORKS DESIGN ENGINEER. 3. THE BOUNDARIES OF THE CLEARING LIMITS AND AREAS OF VEGETATION PRESERVATION AS PRESCRIBED ON THE PLAN(S) SHALL BE CLEARLY FLAGGED BY SURVEY TAPE OR FENCING IN THE FIELD PRIOR TO CONSTRUCTION IN ACCORDANCE WITH APPENDIX "D" OF THE SURFACE WATER DESIGN MANUAL AND OBSERVED DURING CONSTRUCTION. DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE CLEARING LIMTS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE MAINTAINED BY THE APPLICANT/ESC SUPERVISOR FOR THE DURATION OF CONSTRUCTION. 4. STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REQUIRED TO ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN AND TRACK OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR THE DURATION OF THE PROJECT. 5. ALL REQUIRED SEDIMENTATION/EROSION CONTROL FACILITIES MUST BE CONSTRUCTED AND IN OPERATION PRIOR TO LAND CLEARING AND/OR CONSTRUCTION TO PREVENT TRANSPORTATION OF SEDIMENT TO SURFACE WATER, DRAINAGE SYSTEMS AND ADJACENT PROPERTIES. ALL EROSION AND SEDIMENT FACILITIES SHALL BE MAINTAINED IN A SATISFACTORY CONDITION UNTIL SUCH TIME THAT CLEARING AND/OR CONSTRUCTION IS COMPLETE AND POTENTIAL FOR ON-SITE EROSION HAS PASSED. THE IMPLEMENTATION, MAINTENANCE, REPLACEMENT AND ADDITIONS TO EROSION/ SEDIMENTATION CONTROL SYSTEMS SHALL BE THE RESPONSIBILITY OF THE PERMITTEE. 6. THE EROSION AND SEDIMENTATION CONTROL SYSTEMS DEPICTED ON THIS DRAWING ARE INTENDED TO BE MINIMUM REQUIREMENTS TO MEET ANTICIPATED SITE CONDITIONS. AS CONSTRUCTION PROGRESSES AND UNEXPECTED OR SEASONAL CONITIONS DICTATE, THE PERMITEE SHALL ANTICIPATE THAT MORE EROSION AND SEDIMENTATION CONTROL FACILITIES WILL BE NECESSARY TO INSURE COMPLETE SILTATION CONTROL ON THE PROPSED SITE. DURING THE COURSE OF CONSTRUCTION, IT SHALL BE THE OBLIGATION AND RESPONSIBILITY OF THE PERMITEE TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY THE ACTIVITIES AND TO PROVIDE ADDITIONAL FACILITIES, OVER AND ABOVE MINIMUM REQUIREMENTS, AS MAY BE NEEDED, TO PROTECT ADJACENT PROPERTIES AND WATER QUALITY OF THE RELIEVING DRAINAGE SYSTEM. 7. APPROVAL OF THIS PLAN IS FOR EROSION/SEDIMENTATION CONTROL ONLY. IT DOES NOT CONSTITUTE AN APPROVAL OF STORM DRAINAGE DESIGN, SIZE NOR LOCATION OF PIPES, RESTRICTORS, CHANNELS, OR RETENTION FACILITIES. 8. ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE DISTURBED FOR TWO DAYS DURING THE WET SEASON (OCTOBER 1ST -MARCH 30TH) OR SEVEN DAYS DURING THE DRY SEASON (APRIL 1ST - SEPTEMBER 30TH) SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED ERC COVER METHODS (e.g. SEEDING, MULCHING, PLASTIC COVERING, ETC.). 9. WET SEASON SEASONAL EROSION AND SEDIMENT CONTROL REQUIREMENTS APPLY TO ALL CONSTRUCTION SITES CLEARING BEWTEEN OCTOBER 1 AND MARCH 30 INCLUSIVE, UNLESS OTHERWISE APPROVED BY THE CIN THROUGH AN ADJUSTMENT PROCESS. 10. COVER MEASURES WILL BE APPLIED IN CONFORMANCE WITH APPENDIX "D" OF THE SURFACE WATER DESIGN MANUAL. 11. ANY AREA NEEDING ERC MEASURES, NOT REQUIRING IMMEDIATE ATTENTION, SHALL BE ADDRESSED WITHIN SEVEN (7) DAYS. 12. THE ERC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN 24 HOURS FOLLOWING A STORM EVENT. 13. AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT -LADEN WATER INTO THE DOWNSTREAM SYSTEM. 14. DURING THE TIME PERIOD OF OCTOBER 1ST - MARCH 30TH, ALL PROJECT DISTURBED SOIL AREAS, THAT ARS TO BE LEFT UN -WORKED FOR MORE THAN 12 HOURS, SHALL BE COVERED BY MULCH, SODDING, OR PLASTIC COVERING. 15. ANY PERMANENT RETENTION/DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL BE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND SHALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE PERMANENT FACILITY IS TO FUNCTION Ul TIMATELY AS AN INFILTRATION SYSTEM, THE TEMPORARY FACILITY MUST BE ROUGH GRADED SO THAT THE BOTTOM AND SIDES ARE AT LEAST THREE FEET ABOVE THE FINAL GRADE OF THE PERMANENT FACILITY. 16. PRIOR TO THE BEGINNING OF THE WET SEASON (OCT. 1), ALL DISTURBED AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON. A SKETCH MAP OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE CIN OF RENTON FOR REVIEW. EROSION CONTROL NOTES: (A) THE SOIL MOISTURE HOLDING CAPACITY OF ALL NEW PREVIOUS SURFACE THAT AT PROJECT COMPLETION WILL NOT BE COVERED BY IMPERVIOUS SURFACE OR INCORPORATED INTO A DRAINAGE FACILITY MUST BE PROTECTED. THE DUFF LAYER AND NATIVE TOPSOIL SHALL BE RETAINED IN AN UNDISTURBED STATE TO THE MAXIMUM STENT FEASIBLE. (B) ANY DUFF LAYER OR TOPSOIL REMOVED DURING GRADING SHALL BE STOCKPILED ONSITE IN A DESIGNATED, CONTROLLED AREA NOT ADJACENT TO PUBLIC RESOURCES AND CRITICAL AREAS. THE MATERIAL SHALL BE REAPPLIED TO OTHER PORTIONS OF THE SITE WHERE FEASIBLE. (C) THE SOIL IN ANY AREA THAT HAS BEEN COMPACTED OR THAT HAS SOME OR ALL OF THE DUFF LAYER OR UNDERLYING TOPSOIL REMOVED SHALL BE AMENDED TO MITIGATE FOR LOSS OF MOISTURE -CAPACITY. THE AMENDMENT SHALL TAKE PLACE BETWEEN MAY 1 AND OCTOBER 1. REPLACED TOPSOIL SHALL BE A MINIMUM 8 INCHES THICK. REPLACED TOPSOIL SHALL HAVE AN ORGANIC MATTER CONTENT BETWEEN 8 AND 13 PERCENT DRY WEIGHT AND A pH SUITABLE FOR THE PROPOSED LANDSCAPE PLANTS. OFFE ENGINEERS 13932 SOUTHEAST 159TH PLACE RENTON, WASHINGTON 98058 PHONE: 425-260-3412 CONTACT: DARRELL OFFE, P.E. CONSTRUCTION SEQUENCE 1. PRE -CONSTRUCTION MEETING. 2. POST SIGN WITH NAME AND PHONE NUMBER OF ESC SUPERVISOR (MAY BE CONSOLIDATED W/THE REQUIRED NOTICE OF CONSTRUCTION SIGN). 3. FLAG OR FENCE CLEARING LIMITS. 4. INSTALL CATCH BASIN PROTECTION WHERE REQUIRED. 5. GRADE AND INSTALL CONSTRUCTION ENTRANCE(S). 6. INSTALL TREE PROTECTION FENCING 7. INSTALL PERIMETER PROTECTION (SILT FENCE, BRUSH BARRIER, ETC.) 8. CONSTRUCT SEDIMENT PONDS AND TRAPS, IF REQUIRED 9. GRADE AND STABILIZE CONSTRUCTION ROADS. 10. CONSTRUCT SURFACE WATER CONTROLS (INTERCEPTOR DIKES, PIPE SLOPE DRAINS, ETC.) SIMULTANEOUSLY WITH CLEARING AND GRADING FOR PORJECT DEVELOPMENT. 11. MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH APPENDIX D OF THE SURFACE WATER DESIGN MANUAL AND MANUFACTURE'S RECOMMENDATIONS. 12. RELOCATE EROSION CONTROL MEASURES OR INSTALL NEW MEASURES SO THAT AS SITE CONDITIONS CHANGE THE EROSION AND SEDIMENT CONTROL IS ALWAYS IN ACCORDANCE WITH THE CITY'S EROSION AND SEDIMENT CONTROL STANDARDS. 13. COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON WITH STRAW, WOOD FIBER MULCH, COMPOST, PLASTIC SHEETING OR EQUIVALENT. 14. STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN SEVEN DAYS. 15. SEED OR SOD ANY AREAS TO REMAIN UNWORKED FOR MORE THAN 30 DAYS. 16. UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST BE STABILIZED AND BMP'S REMOVED IF APPROPRIATE. L. ivy•""• °�� a• °y•�o �?,O •,p� 274ac O •: S..... • � /ONAL �' 01/06/2015 NO. X04TS A FILTER FABRIC S -ALL BE SPIKED AT POSTS wK STAPIEi. MW RIN". OR EOLANALENT TO ATTACw F&Mfnr TA OndrT! r d• 9v a CAN www OR ECAWAL . IF WAfOMO !lIEMGiH FAMIC iA@® i FIL VW MOBIL - i I 3 MOMAN 4W 7IWdOC R sACKFILL TIIENCH W1114 NATIVE JIM 21109 WOOD POSM STS FEMM POsss„ AEMR ON EQUFAW90 F SEASON EROSION CONTROL MEASURES ARE APPLICABLEET SEASON (OCT. 1st -APRIL 30th). SEE NOTES ONET 3 AT u Y Km I wArm nay SE INCIO&PA .D TO v w www 11#40fa s .im r d• 9v a CAN www OR ECAWAL . IF WAfOMO !lIEMGiH FAMIC iA@® i FIL VW MOBIL - i I 3 MOMAN 4W 7IWdOC R sACKFILL TIIENCH W1114 NATIVE JIM 21109 WOOD POSM STS FEMM POsss„ AEMR ON EQUFAW90 F SEASON EROSION CONTROL MEASURES ARE APPLICABLEET SEASON (OCT. 1st -APRIL 30th). SEE NOTES ONET 3 AT � f � Y a s• / e k, N. Noir 1. CONOFT N OF UBE 1.1, SILT FENCE MAY BE USED DOWNSLOPE OF ALL DISTURBED AREAS_ 1.2 SILT FENCE IS NOT INTMDED TO TREAT CONCENTRATED FLOATS. MOR IS INTENDED TO TREAT SUBSTANTIAL AMOUNTS OF OVERLAND FLOW. ANY CONCENTRATED FLOW MOST BE CONVEYED THROUGH THE DRA*^QE SYSTEM TO A SEDIMENT TRAP OR POND. L Orit3M AND BNBTALLATWN &MCMATIOML 2.1. THE GEOTEXTILE USED MOST YET THE STANDARD LISTED BELLOW. A COPY OF THE MANUFACTURERS FABRIC SPECFICATIONS MOST BE AVAILABLE ON SITE. AoyjASf til xjSi� jI01 Ssri E S:m 10, w4 L90A FCRSii'-_; Jl civ_-.--_-- _ ,SJ ._u 5;£ a_£ S<s ;v-i[iQ 1511MAj WR i??Mill iAYipC1 VATMPfNA-T`.r'Y jA�TI►iW91---.3 N VILeRxMAr� GRAN TfMl-Il l?RfMCNT i4�'I/ WAi2t iw An Mtts cf}It Ext£tn ST1R.aG>'1:A84<c 1x -t-, "k £Oit S1Aft0"OSTRfft(o :AW"' fiU& T N'5 ,f JLC-WaATic7R, IASIM _Hr 32: w %N A It rUlk iJtATE RiS+'>IANC£ j -41%J Aj-j PQ ML% 2.2 STANDARD STRENGTH FABRIC REQUIRES WIRE BACKING TO INCREASE TME STRENGTH Of THE FENCE. WIRE BACKING OR CLOSER POST SPACING MAY BE REQUIRED FOR EXTRA STRENGTH FABRIC IF FIELD PERFORMANCE WARRANTS A STRONGER FENCE - 2 & W1HERE THE FENCE Is hSTALLED. THE SLOPE SMALL NOT BE STEEPER THAN 2KW 24, IF A TYPICAL SILT FENCE IS USED, THE STANDARD 44x4 TREN'ICH MAY NOT BE REDUCED AS LONG AS THE BOTTOM i INCHES OF THE SILT FENCE IS WELL BURIED AND SECURE N A TRENCH THAT STABLE THE FENCE AND DOES NOT ALLOW WATER TO BYPASS OR UNIM&ME THE OLT FENCE. E. NMAwT1EiiANNCE 6TANrDAM11 31. ANY DAMAGE Stall BE. REPAJ R IMMEDIATELY. 3.2 IF CONCENTRATED FLOES ARE EVIDENT UPHILL OD THE FE)"• THEY MUST BE INTERCEPTED AND CONVEYED TO A SEDIMENT TRAP OR POND. 3.3. IT 6 IMPORTANT TO CHECK THE UPHILL SIDE OF THE FENCE FOR SIGNS OF THE FENCE CLOGGING AND ACING AS A BARRIER TO FLOW AND THEN CAUSING CHANNELIZATI N OF FLOWS PARALLEL TO THE FENCE. IF THIS OCCLRS, REPLACE THE FENCE OR REMOVED THE TRAP SEDIMENT. 3.4. SEDIMENT MOST BE REMOVED WHEN SEDAIEMT IS 6 It40HU MIGHT. 3.b. IF THE FILTER FABRIC WOTMILE) HAS DETBOORA7EO DUE TO ULTRAWOLET BREAKDOWN. rT SHALL BE REPLACED. PUBLIC WORKS SILT FENCE � BTD. FUN214-00 { i DEPARTMENT MARCH 2008 INSTALL TREE PROTECTION FENCING PER DETAIL TYP. i TYPICAL EXienN© MEE PROTECTION ILI& SI� SURVEY do MAPPING DESNONM SCALE D.L. OFFE, P.E. D.L OFFE, P.E. ONE WCH Cie AT FULL SGL[ REVISION BY DATE APPR SCALE /iCCOCO waH Apggl�; ROM4GLY VE Cfr.*1.: NAND 19M HORIZONTAL: IUD 1983/1991 A&�� DATU M 404 \ , 3 FOR CED. '8" STRUCTURAL IT STEEL POST 2' BELOW GRADE 11 GAUGE kNIZED CHAINUNK I. SET POSTS 10' MAX. j"- CITY OE mg RENTON Planning/Building/Public Works Dept. FA FENCING TO BE INSTALLED LL DOWNSLOPES NO SITE DRAINAGE SHALL RUNOFF TO NEIGHBORING PROPERTY INSTALL SILT FENCE TO BE INSTALL[ ALONG WEST AND NORTH PROPERTY LINES (ON ALL DOWNSLOPES) TO BE REMOVED RE -GRADED CONTOURS xl X08 INSTALL TREE PROTECTION Soso FENCING PER DETAIL TYP. TREES TO BE RETAINED AND SAVED (TYPICAL). DIRT QUANTITIES CUT EXCAVATION) 260 CU. YDS. FILL BACKFILL) 260 CU. YDS. DUST CONTROL MEASURES WILL BE APPLICABLE. -3 77103 GRAPHIC SCALE 0 15 30 60 66w!!!% 1 1 inch = 30 feet RECOMMENDED FOR APPROVAL Byl Date, By, Date, B :jaDatel 17. ByI Date, 20L NE 7th NORTH PHASE 2 01/06/2015 SCOTT DONOGH HOMES, INC. ;,°°'° EROSION CONTROL PLAN 3518 NE 7th Street 'HM` 4 °i` 13 1EIR EIISI I EIIN :C Z X, D