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Home My WebLink AboutR-400306I w 0 3.1 CU LLJ 0 0 I 0 U) Ld Ld U) 0 0 a U i Ld U Q ry ry Ld Ld v)n z V) o04 _ D- �040 0-0)D- L.i LLI w :2 �:2Q QFz z Ld LLJ J 0 N LLL D_ =) GROOVESV\ FERTILIZER, AND DECREE NOTES 1. CONDITION OF USE 1.1. ALL SLOPES STEEPER THAN 3:1 AND GREATER THAN 5 VERTICAL FEET REQUIRE SURFACE ROUGHENING.. 1.2. AREAS WITH GRADES STEEPER THAN 3:1 SHOULD BE ROUGHENED TO A DEPTH OF 2 TO 4 INCHES PRIOR TO SEEDING. 1.3. AREAS THAT WILL NOT BE STABILIZED IMMEDIATELY MAY BE ROUGHENED TO REDUCE RUNOFF VELOCITY UNTIL SEEDING TAKES PLACE. 1.4. SLOPES WITH A STABLE ROCK FACE DO NOT REQUIRE ROUGHENING. 1.5. SLOPES WHERE MOWING IS PLANNED SHOULD NO BE EXCESSIVELY ROUGHENED. 2. DESIGN AND INSTALLATION SPECIFICATIONS 2.1. DISTURBANCE AREAS THAT WILL NOT REQUIRE MOWING MAY BE STAIR-STEO GRADED, GROOVED, OR LEFT ROUGH AFTER FILLING. 2.2. STAIR STEP GRADING IS PARTICULARLY APPROPRIATE IN SOILS CONTAINING LARGE AMOUNTS OF SOFT ROCK. STAIR SHOULD BE WIDE ENOUGH TO WORK WITH STANDARD EARTH MOVING EQUIPMENT. STAIRS STEPS MOST BE ON CONTOURS OR GULLIES WILL FORM ON THE SLOPE. 2.3. AREAS THAT WILL BE MOWED, MAY HAVE SMALL FURROWS LEFT BY DISKING, HARROWING, RANKING, OR SEED -PLANTING MACHINERY OPERATED ON THE CONTOUR. 2.4. GRADED AREAS WITH SLOPES GRATER THAN 3:1 BUT LESS THAN 2:1 SHOULD BE ROUGHED BEFORE SEEDING. 3. MAINTENANCE STANDARDS 3.1. PERIODICALLY CHECK ROUGHENED, SEEDED, PLANTED AND MULCHED SLOPES FOR RILLS AND GULLIES, PARTICULARLY AFTER A SIGNIFICANT STORM EVENT. FILL THIS AREAS SLIGHTLY ABOVE THE ORIGINAL GRADE, THEN RE -SEED AND MULCH AS SOON AS POSSIBLE. PUBLIC WORKS SURFACE ROUGHING STD. PLAN — 213.00 DEPARTMENT �NTp MAR"'li 2008 CONSTRUCTION RECORD DRAWING THIS CONSTRUCTION RECORD DRAWING IS A COPY OF THE APPROVED CONSTRUCTION DRAWING PREPARED BY OSBORN CONSULTING INC. AND HAS BEEN EDITED USING INFORMATION PROVIDED BY OAK HILLS CONSTRUCTION, LLC TO REFLECT ASBUILT CONDITIONS ( 1.2m.2m) ADJACENT ROLLS SHALL TIGHTLY ABUT III —III -I SEDIMENT, ORGANIC MATTER, AND NATIVE SEEDS ARE \ =III , CAPTURED BEHIND THE ROLLS ROLL SPACING -III—III 1 DEPENDS ON SOIL --I TYPE AND SLOPE STEEPNESS _III I/ I TOE IN SHEETING IN MINIMUM 4"X4" TRENCH I III -III STRAW ROLLS MUST BE PLACED ALONG SLOPE CONTOURS :..._ I ( 75125mm) � _ MIN. 2" IIIIIIIIIIII PROVIDE ENERGY DISSIP AT TOE WHEN NEEDED - 'III OVERLAP / —III _ I I- ANCHOR IN 6"x6"MIN. TRENCH AND STAPLE AT 12" INTERVALS W-10" DIA. III —I ' MIN. 6" OVERLAP (200-250mm) _ STAPLE OVERLAPS LIVE STAKE _ I I I -I I I —I I I —I I I —I I I —I �I - MAX. F SPACING BRING MATERIAL DOWN TO A LEVEL AREA, TURN ? THE END UNDER 4" AND STAPLE AT 12" INTERVALS NOTES 1. CONDITION OF USE 1.1. FOR PERMANENT STABILIZATION OF SLOPES 2HAV OR GREATER AND WITH MORE THAN 10 FEET OF VERTICAL RELIEF. 1.2. 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. 2. DESIGN AND INSTALLATION SPECIFICATIONS EROSION CONTROL BLANKETS SHALL BE PER WSDOT STD SPEC 9-14.5(2) 2.1. INSTALLATION IS CRITICAL TO THE EFFECTIVENESS IF THIS PRODUCT IF GOOF GROUND CONTACT IS NOT ACHIEVED, RUNOFF CAN CONCENTRATE UNDER THE PRODUCT, RESULTING IN SIGNIFICANT EROSION.. 2.2. JUTE MATTING MUST BE USED IN CONJUNCTION WITH MULCH. EXCELSIOR, WOVEN STRAW, BLANKETS, AND COIR ( COCONUT FIBER) BLANKETS MAY BE INSTALLED WITHOUT MULCH. 2.3. PURELY SYNTHETIC BLANKETS ARE ALLOWED, BUT SHALL ONLY BE USED FOR LONG-TERM STABILIZATION OF WATERWAYS. THE ORGANIC BLANKETS, ARE BETTER FOR SLOPE PROTECTION AND SHORT-TERM WATERWAY PROTECTION BECAUSE THEY RETAIN AND PROVIDE ORGANIC MATTER TO THE SOIL, SUBSTANTIALLY IMPROVING THE SPEED AND SUCCESS OF RE -VEGETATION. 3. MAINTENANCE STANDARDS 3.1. GOOD CONTACT WITH THE GROUND MOST BE MAINTAINED, AND THERE MOST NOT BE EROSION BENEATH THE BET OR BLANKET. 3.2. AREAS OF THE NET OR BLANKET THAT ARE DAMAGED OR NOT CLOSE CONTACT WITH THE GROUND SHALL BE REPAIRED AND STAPLED. 3.3. IF EROSION OCCURS DUE TO POORLY CONTROLLED DRAINAGE, THE PROBLEM SHALL BE FIXED AND THE ERODED AREA PROTECTED. •� y— STD. PLAN — 213.20 6"�' PUBLIC WORKS SLOPE INSTALLATIONS DEPARTMENT OF EROSION CONTROL BLANKETS A-11�C11 tN p Iv008 TO PREVENT RUN OFF FLOWING DOWN FACE OF CUT INSTALL INTERCEPTOR SWALE. LOCATION PER PLANS. EROSION CONTROL BLANKET OR PLASTIC COVERING PER CITY OF RENTON STANDARD PLAN 213.20, OR 213.30 STRAW WATTLE SPACING PER CITY OF RENTON STANDARD PLAN 213.40 INTERCEPTOR SWALE. LOCATION PER PLANS CUT HEIGHT VARIES 0—FT TO 13—FT SEE STRUCTURAL SHORING PLAN S000 TEMPORARY GRADING SET BACK STABILIZATION N.T.S. 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, RIPRAP, 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. 1`SY O � '� PUBLIC WORKS i DEPARTMENT �`N•t0 PLASTIC COVERING STD. PLAN — 213.30 �l!ll�Cll 2008 NOTES 1" x 1" STAKE 1. CONDITION OF USE 1.1. SEEDING SHALL BE USED THROUGH THE PROJECT ON DISTURBED AREAS THAT HAVE REACHED FINAL GRADE OR THAT WILL REMAIN UNWORKED FOR MORE THAN 30 DAYS. 1.2. 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) 1.3. RETENTION / DETENTION PONDS SHALL BE SEEDED AS REQUIRED. 1.4. AT THE CITY'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. 1.5, AT THE BEGINNING OF THE WET SEASON, ALL DISTURBANCES AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHOULD BE SEEDED WITHIN A WEEK OF BEGINNING OF THE WET SEASON. AT FINAL SITE STABILIZATION, ALL DISTURBED AREAS NOT OTHERWISE VEGETATED OR STABILIZED SHALL BE SEEDED AND MULCHED. 2. DESIGN AND INSTALLATION SPECIFICATIONS 2.1. 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 MIGHT TAKE SEVERAL MONTHS TO DEVELOP A DENSE GROUNDCOVER DUE TO COLD TEMPERATURES. 2.2. TO PREVENT SEED FROM BEING WASHED AWAY CONFIRMED THAT ALL REQUIRED SURFACE WATER CONTROL MEASURES HAVE BEEN INSTALLED. 2.3. THE SEEDBED SHOULD BE FIRM BUT NOT COMPACTED. 2.4. IN GENERAL, 10-20-20N-P-K FERTILIZER MAY BE USED AT A RATE OF 90 POUNDS PER ACRE. IT IS RECOMMENDED THAT AREAS BEING SEEDED FOR FINAL LANDSCAPING CONDUCT SOIL TO DETERMINE THE EXACT TYPE AND QUANTITY OF FERTILIZER NEEDED. DISTURBED AREAS WITHIN 200 FEET OF WATER BODIES AND WETLANDS MUST USE SLOW RELEASE LO-PHOSPHORUS FERTILIZER. 2.5. THE FOLLOWING REQUIREMENTS APPLY FOR MULCHING 2.5.1. MULCH IS ALWAYS REQUIRED FOR SEEDING SLOPES GREATER THAN 3H:1 V 2.5.2. IF SEEDING DURING WET SEASON MULCH IS REQUIRED 2.5.3. THE USE OF MULCH MAY BE REQUIRED DURING WET SEASON AT THE CITY'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. 2.5.4. MULCH MAY BE APPLIED IN TOP OF THE SEED OR SIMULTANEOUSLY BY HYDROSEEDING. 2.6. HYDROSEEDING IS ALLOWED AS LONG AS TRACKIFIER IS INCLUDED. HYDROSEEDING WITH WOOD FIBER MULCH IS ADEQUATE DURING THE DRY SEASON. HYDROSEEDING WITH WOOD FIBER MULCH IS ADEQUATE DURING THE DRY SEASON. DURING THE WET SEASON, THE APPLICATION RATE SHOULD BE DOUBLED. IT MIGHT BE NECESSARY IN SOME APPLICATIONS TO INCLUDE STRAW WITH THE WOOD FIBER, BUT THIS CAN BE DETERMINED TO GERMINATION. 2.7. 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 IMPROVED THE OVERALL SOIL QUALITY. MOST NATIVE SOILS WILL REQUIRE THE ADDITION OF 4 INCHES OF WELL -ROTTED COMPOST TO BE TILLED INTO THE SOIL TO PROVIDE A GOOD QUALITY TOPSOIL. APPROVED BY: APPROVED BY: APPROVED BY: APPROVED BY: PUBLIC WORKS DEPARTMENT STRAW WATTLES DATE: DATE: DATE: DATE: R-400306 STD. PLAN — 213.40 MARCH 2O08 Know what's below. Cali before you dig.