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HomeMy WebLinkAboutR-390603C) ( C') I O r) W DRIVEWAYS SHALL BE PAVED TO THE EDGE OPT OF R.OM PRIOR TO INSTALLATION OF THE CONSTRUCTION ENTAMCe AVOID XO �c�KiN DAMAGING OFF THE ROADWAYO t' IT IS RECOMMENDED THATTNE R W MIN: ENTRANCE BE CROWNED SD THAT RUNOFF DRAINS OFFTHE PAD INSTALL URIVELYAYCULVERT IF THERE !S A ROADSIDE DITCH PRESENT: AS OFR CI.TYROAO STANDARDS 4" W OVARRY SPAS GtEOTOMLE 12" MIN. THICKNESS PROVIDE FULL, WIDTH OF NOTES INGRE$81FORESS AREA 1. CONDITION OF USE. 1.1• CONSTRUCTION ENTRANCE SHALL BE STABILIZED WHEREVER TRAFFIC WILL BE LEAVING A CONSTRUCTION SITE AND TRAVELING ON. PAVED ROADS OR OTHER PAVED AREAS WITHIN 1,000 FEET OF THE SITE. GRAB TENSILE S FREBNGTH (ASTM D4751) 2MPSI MIN: GRAB TeNSME ELONGATION (ASTM D4632) 37%,MAX. MULLEN BURST STRENGTH ASTM D3786- 80A 400'PSI MIN, AOS (ASTM D4751) 20,45 U.S. STANDARD SIEVE SIZE} 2. DESIGN AND INSTALLATION SPECIFICATIONS 2A. HOG FUEL (WOOD BASED MULCH) MAY BE SUBSTITUTED FOR OR COMBINED WITH QUARRY SPALLS IN ARE$ THAT WILL SOT BE USED FOR.PERMANENT ROADS. 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 HOG FUEL 1S BEING CARRIED ONTO PAVEMENT. 2.2. FENCING SHALL BE INSTALLED AS NECESSARY TO RESTRICT TRAFFIC TO THE CONSTRUCTION ENTRANCE. 2.3. WHENEVER POSSIBLE, THE ENTRANCE SHALL BE CONSTRUCTED ON A FIRM, COMPACTED SUBGRADE:t THIS .CAN SUBSTANTIALLY INCREASE THE EFFECTIVENESS OF THE PAD AND REDUCE THE NEED FOR MAINTENANCE. 3. MAINTENANCE STANDARDS 3:1. QUARRY SPALLS SHALL: BE ADDED IF THE PAD IS NO LONGER IN ACCORDANCE WITH THE SPECIFICATIONS. 3 T A ES T D . 2. !F THE ENTRANCE IS NOT PREVENTING SEDIMENT BEING TRACKED ONTO PAVEMENT, MENTTHEN ALTERNATIVE MEASURES O KEEP THE THE DIMENSIONS OF THE D STREET SWEEPING AN INCREASE IN N STREETS FREE OF SEDIMENT SHALL. BE USED. THIS MAY INCLUDE M IN R E ENTRANCE, OR THE INSTALLATION OF THE A WHEEL WASH. IF WASHING IS USED,'IT SHALL BE ON AN AREA COVERED WITH CRUSHED ROCK, AND WASHED WATER SHALL DRAIN TO A SEDIMENT TRAP OR POND. 3.3. 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, T WASH THE STREETS, A EXCEPT WHEN SWEEPING IS INEFFECTIVE AND HERE S ATHR£AT TO PUBLIC SAFETY. IF IT NECESSARY O S ! £ N T ! SMALL SUMP MUST BE CONDUCTED, THE SEDIMENT WOULD THEN BE WASHED INTO THE SUMP WHERE IT CAN BE CONTROLLED AND DISCHARGED APPROPRIATELY. 3A. ANY QUARRY SPALLS THAT ARE LOOSENED FROM THE PAD AND END UP ON THE ROADWAY SHALL BE REMOVED IMMEDIATELY. 3:5, IF VEHICLES ARE ENTERING OR EXITING THE SITES AT POINTS OTHER THAN'i'HE CONSTRUCTION ENTRANCE($), FENCING SHALL BE INSTALLED TO CONTROL TRAFFIC. U 4 STD, PLAN - 216.10 PUBLIC WORKS S'Y°AILfiZE = DEPARTMENT CONSTRUCTION RUCTION ENTRANCE MARCH 2008 3 NOTES 1, CONDITION OF USE 1.1. PLASTIC COVERING MAY BE USED ON DISTURBED AREAS THAT REQUIRED COVER MEASURES FOR LESS THAN 30 DAYS. 1.2. PLASTIC IS PARTICULARLY USEFUL FOR PROTECTING CUT AND FILL SLOPES AND STOCKPILES. 1.3. CLEAR PLASTIC SHEETING MAY BE USED OVER NEWLY-SHEEDED AREAS TO CREATE A GREENHOUSE EFFECT AND ENCOURAGE GRASS GROWTH. CLEAR PLASTIC SHOULD NOT BE USED FOR THIS PURPOSE DURING THE SUMMER MONTHS 1.4. THIS METHOD SHALL NOT BE USED UPSLOPE OF AREAS THAT MIGHT BE ADVERSELY IMPACTED BY RUNOFF. SUCH AREAS INCLUDE STEEP AND UNSTABLE SLOPES 2. DESIGN AND INSTALLATION SPECIFICATIONS 2.1. PLASTIC SHEETING SHOULD HAVE A MINIMUM THICKNESS OF 0.03 MILLIMETERS. 2.2. IF EROSION AT THE TOE OF A SLOPE IS LIKELY, A GRAVEL BERM, RIPRAR OR OTHER SUITABLE PROTECTION SHALL BE INSTALLED AT THE TOE OF THE SLOPE IN ORDER TO REDUCE THE VELOCITY OF RUNOFF. 3. MAINTENANCE STANDARDS 3.1. TORN SHEETS MOST BE REPLACED AND OPEN SEAMS REPAIRED. 3.2. IF THE PLASTIC BEGINS TO DETERIORATE DIE TO ULTRAVIOLET RADIATION, IT MOST BE COMPLETELY REMOVED AND REPLACED. 3.3. WHEN THE PLASTIC IS NO LONGER NEEDED, IT SHALL BE COMPLETELY REMOVES. 4�Y o + PUBLIC WORKS PLASTIC COVERING STD. PLAN - 213.30 �NCOZ DEPARTMENT MARCH 2O08 MONTERRA A PORTION OF THE SW 1/4 OF THE NE 1/4 OF SECTION 08, TWN 23N, RNG 05E WILLAMETTE MERIDIAN, KING COUNTY, WASHINGTON 5"MAR. DRAINAGE GRATE TRIM GRATE FRAME SEDIMENT AND, DEBRIS � r OVERFLOW BYPASS 4 V >p BELOW INLET GRATE DEVICE FILTERED WATER " n h p O. 4 A G ,P SECTION VIEW DRAINAGE GRATE. RECTANGULAR GRATE SHOWN RETRIEVAL SYSTEM (TYP.) BELOW INLET GRATE DEVICE . OVERFLOW BYPASS (TYP.) ISOMETRIC VIEW NOTES 1. size the Below Inlet Grate Device:(BIGD) for the storm water structure it will service. 2. The B GD shall have:a built-in hi h4low relief s s Wm (ov rf.ow bypass), 3. The Fatrieval system must allow. removal E l Ahe, SIGD Without spilling the collected material, 4. Perform maintenance In accordance with Standard Specification "1.3(15); . ,21830 PUBLIC WORDS CATCH BASINFILTERSTa?, PUN DEPARTMENT MARCH 2O08 MUM IN FILTER FABRIC SHALL BE SPLICED AT POSTS. USE STAPLES, WIRE RINGS; OR FOUIVALFNTTO ATTACH FABRIC TO POSTS: P Mfll>. POST SPACING MAY BE INCREASED TO B'tFWIRE BACKING IS USED 2°2 BY 14 Go WIRE OR EQUIVALENT, IF STf STRENGTH FABRIC FIL MINIMUM 4"ai4"1RENOf BACKFILL T 2'X4'W000 POSTS. $TEE': POSTS,, RESAR. OR EQUIVALENT NOTES 1. CONDITION OF USE 1.1, SILT FENCE MAY BE USED D OWNSLOPE OF ALL DISTURBED AREAS, ED 1.2. SILT FENCE IS NOT INTENDED TO TREAT CONCENTRATED FLOWS, NOR IS INTENDED TO TREAT SUBSTANTIAL AMOUNTS OF OVERLAND FLOW. ANY CONCENTRATED FLOW MOST BE CONVEYED THROUGH THE DRAINAGE SYSTEM TO A SEDIMENT TRAP OR POND, 2, DESIGN AND INSTALLATION SPECIFICATIONS 2.1. THE GEOTEXTILE USED.MOST MET THE STANDARD LISTED BELLOW.: A COPY OF THE MANUFACTURER'S FABRIC SPECIFICATIONS MOST BE, AVAILABLE ON SITE. jd4WSIEVESIZE(c6Q-C.15NIMI FOR SILTFILM AOS (ASTM 04751) 504WS1EVESIZE (0.30.D.15 f2tga� WATER PERMITTIVITY ASTM0491 0.02 SEC^11 MINIMUM GRAD TENSILE STRENCHT(ASTM D4632) 18DLOS-MWFOR -EXTRASTRENeHFABRIC - 100U35. MIN. FOR STANDARD STRENGHr FABRIC GRA8TENSq.EELONGATION(ASTMO4632) 30%MAX:- ULTRAVIDLATERESISTANCE .(ASTM04355) 70%MIN. I 2.2, STANDARD STRENGTH FABRIC REQUIRES WIRE BACIClNG TO INCREASE THE STRENGTH OF THE FENCE; WIRE BACKING OR CLOSER POST 1E PERFORMANCE WARRANTS STRONGER FENCE. MAY BE REQUIRED R EXTRA STRENGTH FABRIC IF FIELD P RA R R SPACING M E. FO 2.3. WHERE THE FENCE IS INSTALLED, THE SLQPE :SHALL NOT BE STEEPER THAN 2H:1V 2.4. IF A TYPICAL SILT FENCE IS USED, THE STANDARD 4X4 TRENCH MAY NOT BE REDUCED AS GONG AS THE BOTTOMS INCHES OF THE SILT FENCE IS WELL BURIED AND SECURE IN A TRENCH THAT STABILIZES THE FENCE AND DOES NOT ALLOW WATER TO BYPASS OR UNDERMINE THE SILT FENCE. I 3. MAINTENANCE STANDARDS 3.1. ANY DAMAGE SHALL BE REPAIR IMMEDIATELY. EDIMENT TRAP OR POND. E UPHILL D E E: THEY MUST RE INTERCEPTED D-CONS/EYEDTO AS 3;2. IF CONCENTRATED FLOES ARE EVIDENT U L O THE FENCE, T_AND 3.3. 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 REMOVED THE TRAP SEDIMENT. 3A. SEDIMENT MOST BE REMOVED WHEN SEDIMENT IS 6 INCHES HIGH. 3.5. IF THE FILTER FABRIC (GEOTEXTILE) HAS DETERIORATED DUE TO, ULTRAVIOLETBREAKDOwN, IT SHALL BE REPLACED. PUBLIC WORKS DEPARTMENT STD. PLAN - 214.0.0 MARCH 2008 C.3.2 MULCHING DESIGN AND INSTALLATION SPECIFICATIONS FOR MULCH MATERIALS, APPLICATION RATES, AND SPECIFICATIONS, SEE TABLE C.3.2.A. NOTE: THICKNESS MAY BE INCREASED FOR DISTURBED AREAS IN OR NEAR CRITICAL AREAS OR OTHER AREAS HIGHLY SUSCEPTIBLE TO EROSION. MAINTENANCE STANDARDS 1. THE THICKNESS OF THE MULCH COVER MUST BE MAINTAINED. 2. ANY AREAS THAT EXPERIENCE EROSION SHALL BE RE -MULCHED 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 RE -MULCHED. �� I'll i�4 v -... e a >, a - I If + i Mulch Quality Standards Application Remarks Material Rates Straw Air-dried; free from 2"-3" thick; 2-3 Cost-effective protection when applied with adequate undesirable seed and bales per 1000 sf thickness. Hand -application generally requires greater coarse material or 2-3 tons per acre 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 used Cellulose factors per 1000 sf or without seed and tackifier unless the application rate is at 1000-1500 Ibs per least doubled. Some wood fiber with very long fibers can acre be effective at lower application rates and without seed or. tackifier. Compost No visible water or dust 2" thick min.; More effective control can be obtained by increasing during handling. Must approx. 100 tons thickness to 3". Excellent mulch for protecting final be purchased from per acre (approx. grades until landscaping because it can be directly supplier with Solid 800 Ibs per cubic seeded or tilled into soil as an amendment. Sources for Waste Handling Permit. yard) compost are available from the King County Commission for Marketing Recyclable Materials at (206) 296-4439. Hydraulic This mulch category Apply at rates from The BFM shall not be applied immediately before, during Matrices includes hydraulic 3,000 Ibs per acre or immediately after rainfall so that the matrix will have (Bonded Fiber slurries composed of to 4,000 Ibs per an opportunity to dry for 24 hours after installation. Matrix) wood fiber, paper fiber acre and based on Application rates beyond 2,500 pounds may interfere with or a combination of the manufacturers germination and are not usually recommended for turf two held together by a recommendations establishment. BFM is generally a matrix where all fiber binding system. The and binders are in one bag, rather than having to mix BFM shall be a mixture components from various manufacturers to create a of long wood fibers and matrix. BFMs can be installed via helicopter in remote various bonding agents. areas. They are 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. CITY OF RENTONr 1:>E=-PART'MEN_F F Pl. BBC: WC)RKS N a c6 cC O O O APPROVED BY DATE co m W APPROVED BY DATE APPROVED BY DATE a a a APPROVED BY DATE PERMIT@ U1691 SITE ADDRESSi 905 SUNSET 6LVD NE ETO, WA 98056 ASBUILT RECORD THE SHOWN HORIZONTAL AND VERTICAL LOCATIONS OF THE STORM DRAINAGE AND ROAD SYSTEMS WAS FIELD SURVEYED BY ME OR UNDER MY DIRECTION. THOSE RELYING ON THIS RECORD DOCUMENT ARE ADVISED TO OBTAIN INDEPENDENT VERIFICATION OF ITS ACCURACY BEFORE APPLYING IT FOR ANY PURPOSE, C.3.10 SEEDING DESIGN AND INSTALLA11ON 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. 4. IN GENERAL, 10 20 20 N-P K - G) FERTILIZER MAY BE USED AT A ( NITRO RATE OF 90 POUNDS PER ACRE. SLOW -EN -PHOSPHORUS -POTASSIUM 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 . 5. THE FOLLOWING REQUIREMENTS APPLY TO MULCHING: a) MULCH IS ALWAYS REQUIRED FOR SEEDING SLOPES GREATER THAN 3H:1V (SEE SECTION D.4.2.1). 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 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 ECOLOGY PUBLICATION 98-38 SPECIFICATIONS FOR GRADE A QUALITY COMPOST. 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 FACTORS, INCLUDING EXPOSURE, SOIL TYPE, SLOPE, AND EXPECTED FOOT TRAFFIC. ALTERNATIVE SEED MIXES APPROVED BY THE COUNTY MAY BE USED. Tc�l6LE ._ % Weight % Purity % Germination Chewings or red fescue (Festuca rubra var. 40 98 90 commutate or Festuca rubra) Annual or perennial rye (Lolium multiflorum or Lolium 40 98 90 perenne) Redtop or colonial bentgrass (Agrostis albs or 10 92 85 Agrostis tenuis) White dutch clover (Trifolium repens) 10 98 90 % Weight % Purity % Germination Perennial rye blend (Lolium perenne) 70 98 90 Chewings and red fescue blend (Festuca 30 98 90 rubra var. commutata or Festuca rubra) MAINTENANCE STANDARDS FOR SEEDING 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. 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 RUNOFF. to I tZOo OZ z W O W O E o Z O Z O (r /Zy LL Z/y cr I- O O r � m Q U w a U w a- <1<a Z 1� III 47203 S 3 CQCQo I I � M Co ItIT14 co co m CQ of as w l~ U 40 o �M ® N or M Q C0 LU r` o UJ rn Lila Q < z Boom® 0 0 I- vi W 0= O Q (� Ca O z U a� O U O N r` li U Designed: DIPS Drawn: MRL Checked: DPS Scale: NTS Date: 03.29.17 Job No.: 14038 Sheet No.: 3 of 14 Sheets R-390603