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HomeMy WebLinkAboutR-383605EROSION ZSEDIMENTATION CONTROL NOTES 1. APPROVAL OF THIS TEMPORARY EROSION/SEDIMENTATION CONTROL PLAN (TESCP) DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (E.G. SIZE AND LOCATION OF ROADS, PIPES, RESTRICTORS. CHANNELS, RETENTION FACILITIES. UTILITIES, ETC) 2. THE IMPLEMENTATION OF THESE TESCP AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT AND UPGRADING OF THESE TESCP FACILITIES IS THE RESPONSIBILITY OF THE APPLICANT/CONTRACTOR UNTIL ALL CONSTRUCTION IS APPROVED. 3. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE CLEARLY FLAGGED IN THE FIELD PRIOR TO CONSTRUCTION. DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE FLAGGED CLEARING LIMITS SHALL BE PERMITTED. THE FLAGGING SHALL BE MAINTAINED BY THE APPLICANT/CONTRACTOR FOR THE DURATION OF THE CONSTRUCTION. 4. THE TESCP FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO ALL CLEARING AND GRADING ACTIVITIES, AND IN SUCH A MANNER TO INSURE THAT SEDIMENT LADEN WATER DOES NOT ENTER THE DRAINAGE SYSTEM OR VIOLATE APPLICABLE WATER STANDARDS. 5. THE TESCP FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD. THESE TESCP FACILITIES SHALL BE UPGRADED (E.G. ADDITIONAL SUMPS, RELOCATION OF DITCHES AND SILT FENCES, ETC.) AS NEEDED FOR UNEXPECTED STORM EVENTS AND AS THE CITY REQUIRES 6. THE TESCP FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/CONTRACTOR AND MAINTAINED AS NECESSARY TO ENSURE THEIR CONTINUED FUNCTIONING AND OPERATION 7. ANY AREA STRIPPED OF VEGETATION. INCLUDING ROADWAY EMBANKMENTS, WHERE NO FURTHER WORK IS ANTICIPATED FOR A PERIOD OF TWO (T2) DAYS, SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED TESCP METHODS (E.G. SEEDING, MULCHING. NETTING, EROSION BLANKETS, ETC,) GRASS SEEDING ALONE WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRIL THROUGH OCTOBER INCLUSIVE. 8. ANY AREA NEEDING TESCP MEASURE, NOT REQUIRING IMMEDIATE ATTENTION. SHALL BE ADDRESSED WITHIN FIFTEEN (15) DAYS. 9. THE TESCP FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN 49 HOURS FOLLOWING A STORM EVENT AND AS THE CITY DEEMS NECESSARY. 10. 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. 11. STABILIZED CONSTRUCTION ENTRANCES AND WASH PADS PER CITY STANDARDS, SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURE MAY BE REQUIRED TO INSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT. 12. DURING THE TIME PERIOD OF NOVEMBER 1 THROUGH MARCH 31ST, ALL PROJECT DISTURBED AREAS THAT ARC TO BE LEFT UNWORKED FOR MORE THAN TWO (2) DAYS SHALL BE COVERED BY ONE OF THE FOLLOWING COVER MEASURES: MULCH. SODDING OR PLASTIC COVERING. 13. ANY PERMANENT RETENTION DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL HE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND SHALL PROVIDE ADEQUATE STORAGE CAPACITY AND SHALL BE CLEANED OUT ENTIRELY WITH PROPER DISCHARGE OF WASTEWATER (I.E. SANITARY DISCHARGE). IF THE PERMANENT FACILITY IS TO FUNCTION ULTIMATELY AS AN INFILTRATION OR DISPERSION SYSTEM, THE FACILITY SHALL NOT BE USED AS A TEMPORARY SETTLING BASIN. 14. WHERE SEEDING FOR TEMPORARY EROSION CONTROL IS REQUIRED, FAST GERMINATING GRASSES SHALL BE APPLIED AT AN APPROPRIATE (E.G. ANNUAL OR PERENNIAL RYE APPLIED AT APPROXIMATELY 80 POUNDS PER ACRE). 15. WHERE STRAW MULCH FOR TEMPORARY EROSION CONTROL IS REQUIRED, IT SHALL BE APPLIED AT A MINIMUM THICKNESS OF THREE (3) INCHES OR 3,000 LBS/ACRE. 16. AS CONSTRUCTION PROGRESSES AND UNEXPECTED SEASONAL CONDITIONS DICTATE, AND AS THE CITY REQUIRES, THE PERMITTEE SHOULD ANTICIPATE THAT MORE TESCP MEASURES WILL BE NECESSARY TO PROTECT ADJACENT PROPERTIES AND ENSURE MINIMUM WATER QUALITY FOR SITE RUNOFF. I T R SHALL BE THESP RE ONSIBILITY OF THE PERMITTEE TO DEFICIENT ADDRESS R E TESCP CONDITIONS AND PROVIDE ADDITIONAL DDI ONAL FACILITIES OVER AN ABOVE MINIMUM REQUIREMENTS E U EMENTS Q OUTLINED ON THE APPROVED PLANS. 17. FILTER FABRIC FENCE SHALL E AL B USED WHERE NOTED ON THE HE P LANS OR AS DIRECTED BY THE CITY. (SEE STANDARD DETAIL AND INSTALLATION NOTES IN KCSWDM). AS PER KING COUNTY ROAD STANDARDS, DRIVEWAYS SHALL BE PAVED TO THE EDGE OF R -O- W PRIOR TO /NSTALLA 77ON OF THE CONS7RUC770N EN774ANCE TO AVOID DAMAGING OF 77 -IE ROA DWA Y I IS RECOMMENDED THAT THE ENTRANCE BE CROWNED SO THAT RUNOFF DRAINS OFF THE PAD GRA VEL CONSTRUCTION ENTRANCE CHECKED FOR COMPLIANCE TO CITY STANARSD D Nor TO SCALE REVISIONS N0. DATE REVISIONS 1 05/14/14 COMMENTS REVISIONS 2 04/07/15 VARIANCE REVISIONS JOINTS IN FILTER FABRIC SHALL BE SPLICED AT POSTS. USE STAPLES, WIRE RINGS, OR [7ni 111/A I GAIT T/l A TTA /11 1 rA Mr3i/1 T!% Mr%ClTC- POST SPACING MAY BE INCREASED TO 8' IF WIRE BACKING IS USED 2"x2" BY 14 Ga. WIRE C� EQUIVALENT, IF STANDAf STRENGTH FABRIC USED FILTER MINIMUM 4"x4" TRENCH" BACKFILL TRENCH WITH NATIVE SOIL OR 3/4"-1.5" WASHED GRAVEL 2"x4" WOOD POSTS, STEEL FENCE POSTS, REBAR, OR EQUIVALENT NOTE: FILTER FABRIC FENCES SHALL BE INSTALLED ALONG CONTOUR WHENEVER POSSIBLE CONSTRUCTION SEQUENCE 1. SCHEDULE A PRE -CONSTRUCTION CONFERENCE. 2. INSTALL SILT FENCE AND CONSTRUCTION ENTRANCE. 3. FLAG CLEARING LIMITS. 4. CLEAR AND GRADE SITE WITHIN CLEARING LIMITS. INSTALL ROCKERIES PER PLAN AND DETAIL. 5. INSTALL UTILITIES AND STORM DRAINAGE FACILITIES. PROVIDE CATCH BASIN INLET PROTECTION. 6. BEGIN BUILDING CONSTRUCTION. 7. FINISH GRADE & PAVE PER PLANS. 8. STABILIZE ALL DISTURBED AREAS. 9. FLUSH & CLEAN STORM DRAINAGE FACILITIES. 10. INSTALL LANDSCAPING. 11. UPON FINAL SITE STABILIZATION, CLEAN SITE AND REMOVE REMAINING EROSION AND SEDIMENTATION CONTROL MEASURES UPON SITE STABILIZATION. STANDARD STRENGTH FILTER FABRIC IN, GRATE 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 AND/OR REMOVE THE TRAPPED SEDIMENT. 4. SEDIMENT MUST BE REMOVED WHEN THE SEDIMENT IS 6" HIGH. 5. IF THE FILTER FABRIC HAS DETERIORATED DUE TO ULTRAVIOLET BREAKDOWN, IT SHALL BE REPLACED. SILT FENCE N.T.S. 1 I r I.' 1 . 1 APARTMENTS MAIL BOX; L. BLDG ; :POWE F--------- ML ; 5 OWER�_- _ _--y r ANSFORMER \9 6 X.I\ <' • I ..M 4.14 ,.U• :___._._ �.."_7- < TEMPORARY EROSION CONTROL SEED MIX COMPACTION REQUIREMENT STORM DRAIN MANHOLE 9oWEIGHT %PURITY %GERMINATION SUBGRADE SHALL BE COMPACTED IN THE TOP 0.50' TO 95% CHEWINGS OR RED FESQUE 40 98 90 OF ASTM 1557 FOR A CUT SECTION. CABLE TV RISER E-- UTILITY POLE ANCHOR IF THE UNDERLYING SUBGRADE IS TOO SOFT TO PERMIT ANNUAL OR PERENNIAL RYE 40 98 90 COMPACTION OF THE UPPER 6"LAYER, POWER POLE WITH DROP&TBOX POWER POLE WITH DROP&LIGHT THE CONTRACTOR SHALL LOOSEN (OR EXCAVATE AND REMOVE), REDTOP OR COLONIAL BENTGRASS 10 92 85 AND COMPACT THE SUBGRADE TELEPHONE RISER o MAIL BOX UNTIL THE TOP LAYER CAN MEET COMPACTION REQUIREMENTS. WHITE DUTCH CLOVER 10 98 90 �Q APPLICATION RATE 120 LB/ACRE 1-w 7 6' WOO -� �-------- ---SIL-TN•CE--- - - LIMIT OF CLEARING (TYP) CTYP ) --- --------------- (SEE DE►IL 12' REAR YARD 00 a 4. `so 20 X 50 I' CONSTRUCITON ENTRANCE (SEE DETAIL THIS SHEE Im 4 VbX`!` V \ 1 w rf 5 f' 1 1 NOTE: ONLY TO BE USED WHERE PONDING OF WATER ABOVE :::::::::::<::: : ::::::<.: «.::::<>:: + �r v E CATCH BASIN WILL NOT CAUSE TRAFFIC PROBLEMS AND - :•�����•�• WHERE OVERFLOW WILL NOT RESULT IN EROSION OF SLOPES. %:,,, t o" xxx t , ........... 1 .......... <:««::.:<,::. •:. • :::.� .:•::.:::::::. :::::::::::,:: .... ..... ' YARD BSBL - - ,1 :.::..:.:•::.:.. .............:.. ............. � 20 FRONT - - MAINTENANCE STANDARDS: ::<:«::.....:::�a t 1. ANY ACCUMULATED SEDIMENT ON OR AROUND THE FILTER FABRIC PROTECTION SHALL BE REMOVED t :: IMMEDIATELY. SEDIMENT SHALL NOT BE REMOVED WITH WATER, AND ALL SEDIMENT. _ a a MUST BE DISPOSED OF AS FILL ON-SITE OR HAULED OFF-SITE. I ; :;::;.; w 11 N E TL7Z�ET 3 7 f 2. REGULAR MAINTENANCE IS CRITICAL. UNLIKE MANY FORMS OF PROTECTION THAT FAIL GRADUALLY. : # :.:.::'' , :� on-rrnu FI X �O LI T OF LEARING(TYP) CLEARING LIMITS SILT FENCE 7 f w: of- z o w m O O o U z o N � � �OVIDE CATCH BA ��� P OTECTION R ("i T "THIS SHEET SEE DE',�►J�L VIDE TEMPORARY PLUG. DO NOT ALLOW WATER TO ENTER INFILTRATION FACILITY ! UNTIL AFTER SITE HAS BEEN STABILIZED AND CLEANED., GAS l STUB POWER VAULT 71 LK <. -_ 4. ANY QUARRY SPALLS THAT LOOSENED D ND UP ON 5 PA ARE ENE FROM THE PAD AN E ,.................................... _.......:::.............:.............................. ....... 4 1. r / 1 1 [ 1 / 7NE ROADWAY SHALL BE REMOVED IMMED/A TFL Y.% :::, :. , ,••:. .............. . <• . ., 5. IF VEHICLES ARE EN7FR/NG OR EX177NG 77 -IE SI7F AT POINTS 077-IER THAN w. < .t. THE CONS77?UC770N EN7RANCE(S), FENCING (SEE SECTION D.4.1) SHALL BE ' •, 1 - �' < ,� <4 INSTALLED TO CONTROL TRAFFIC._ N OTE: CALL 1-800-424-5555 BEFORE YOU DIG PREPARED BY PROJECT: R 8627 NE I 80th sc. R D RL _ ea APVD a e A N S T E Y BOTHELL, WA 98011 D 0� A K CLIENT: PHONE: (206) 303-7639 E N G I N E E R I N G FAX.- (425) 4a6 -o267 EMAIL: bencristey@juno.com APARTMENTAO'�ll VLADIMIR DROFIAK 15012 SE 253RD PLACE COVINGTON, WA 98042 206-351-9289 GRAPHIC SCALE 20 0 10 20 40 ( IN FEET ) 1 inch = 20 ft. LEGEND O SANITARY SEWER MANHOLE a STORM DRAIN MANHOLE ® STORM DRAIN CATCH BASIN EX. CULVERT 01 POWER TRANSFORMER ❑T CABLE TV RISER E-- UTILITY POLE ANCHOR -0- UTILITY POLE POWER POLE WITH DROP I POWER POLE WITH DROP&TBOX POWER POLE WITH DROP&LIGHT -OHP- OVERHEAD POVER _EF EXISTING SIGN ❑ TELEPHONE RISER o MAIL BOX FIRE HYDRANT ® WATER METER �Q WATER VALVE WOOD FENCE (WDF) x x CHAIN LINK FENCE (CLF) EX. ROCKERY t S EX. PAVEMENT EX. GRAVEL ::.,.:• .: •' .:,. EX. CONCRETE FIR TREE CEDAR TREE ALDER R-3 83 605 N88°40'51 "E ' BURIED UTILITIES IN AREA CALL BEFORE YOU DIG 1-800-424-5555 EXISTING UTILITIES SH0V61 ARE FROM THE BEST AVAILABLE INFORMATION AND NO GUARANTEE IS MADE AS TO THE EXACT SIZE, TYPE, LOCATION OR DEPTH. SHEET TITLE NP. A DATE 12/30/13 Q.� SCALE » �� of wAs� � 1 =209 DWG © SITE To ® • ® ASOB -51 AE08 �FG 0614��� ��� DRAWN BY 1STR E NOTES AND DETAILS ti� `TNA L �-�� APPROVED 0.BPA • SHEET q5 OF _6_ n n 0 -4 m 7 n 0