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HomeMy WebLinkAbout2-96.3THIS SHEET TO BE USED FOR EROSION CONTROL ONLY NOTE: TO CONTRACTOR 1. Prior to any work commencing contractor shall install stone drive at entrance, and all silt fences shown on plan. 2. Upon completion of the storm structure from being built the fabric prop inlet protection is to be installed ON curb inlets and straw bales on yard inlets immediately. 3. Upon completion of the swale construction, contractor shall notify engineer to as- built, upon review of as -built engineered shall notify contractor to install the erosion control blankets as soon as possible. FORMS/22687 Sol Erosion Control Summary The following is a list in sequence of construction activities to control soil erosion: I. Contractor shall install sediment traps and straw bale filters, as shown. 2. Grade the site (sides of swales, mounds and ponds to be seeded and mulched immediately upon completion). Temporary seeding shall be recommended for all *wales and disturbed areas that cannot be final seeded within a time period that will prevent slope erosion. For temporary seeding, the contractor shall utilize a fast growing seed of either acts, annual ryegross. wheat or rye depending on time of year. Disturbed areas should be kept to a minimum at all times. 3. Contractor shall control mud accumulation on all streets surrounding project by installing stone surface at all locations where construction traffic leaves the site. Dust shall be kept to a minimum by utilizing sprinkling, Calcium Chloride, Vegetative cover, spray on adhesives or other approved methods. 4. Maintain all Store and traps during construction to prevent any blockages from accumulated sediment. Additional seeding and straw bales may be required during construction as specified by Engineer or Sol Conservation Service. Payment for additional straw bales shall be at the Contractors expense. Payment for additional rip rap (not shown on plans) and seeding shall be paid for on a unit basis. 5. Contractor shall install all sanitary sewers, storm sewers, subsurface drains, and water mains. Straw bale Store shall be installed at all storm Inlets (including street Seeding Specifications: I. Ditch Banks: shall be seeded and covered with North American Green fiber blanket /S150 and #SC150 (or Equal) or Hydroseeded with straw mulch. The Contractor shall follow the manufacturers recommended guidelines for Installation and staple patterns when installing the fiber blankets. Seeding rate: 110# /acre or 2.5 #/1000 S.F. Seeding mixture: 38X Kent. 31 Fescue n17171 1 1 11 \.l 1 ) 1 hr\r TOWARD PREVIOUSLY LAID BALE r � WOOD STAKES 15 " -20- IN GROUND ' r CHINK GAPS �/ -r W /STRAW V� .V w iq;;F U. T STRAW BALE DAM DETAIL NOT -TO -SCALE SECTION REQUIREMENTS: CONTROUTMIG DRAINAGE AREA: 1 ACRE MAXIMUM. CAPACITY: RUNOFF FROM A 2 YR. FREQUENCY, 24 HR. DURATION STORM EVENT ENTERING A STORM DRAIN WITHOUT BYPASS FLOW. FABRIC MATERIAL: GEOTEXTiLE FABRIC FOR FILTRATION. "EIGHT OF FABtiK,. 1 TO 1 -1/2 FT., MEASURED FROM TOP OF INLET. APPROACH: POOL AREA FLAT (LESS THAN 1X SLOPE) WITH SEDIMENT STORAGE OF 945 CU.FT. /ACRE DISTURBED. STABrJTY: STRUCTURE MUST WITHSTAND 1 -1/2 FT. HEAD OF WATER AND SEDIMENT WITHOUT COLLAPSING OR UNDERCUTTING. SUPPORT POST& STEEL FENCE POSTS OR 2'x2. OR 2-x4- HARD WOOD POSTS, 3FT. MIN. LENGTH, 3 FT. MAX. SPACING; TOP FRAME SUPPORT RECOMMENDED. CROSS BRACING TOPS OF POSTS TO OPPOSITE CORNERS GREATLY STRENGTHENS SUPPORT. 2'x4• WOOD FRAME OVERFLOW LEVEL SET TO PREVENT BY -PASS COMPACTED DIKE TO PREVENT BY -PASS FLOW (6' HIGHr° INLET PROTECTION) I® 8' 3' 8' 3' 4' 2 4 2' RUNOFF OVERFLOWS INTO INLET 3• ___X ••- -+c x j_01- 20• LO A x x A B Ic >t xpx Z 2 o \ x x x N x x W / 1 STAPLE 1 -1/2 STAPLES 2 STAPLES 3.5 STAPLES PER S0. YD. PEERR SO. YD. PER SO. YD. PER SQ. YD. SLOPE --- \ t \ a z STAPLE PATTERNS APPLY TO ALL NORTH AMERICAN z?e GREEN EROSION CONTROL BLANKETS. STAPLE 40D 1 LENGTTH. SLOPE GRADE. SOIL aTYPE U/N D AVERAGE 17e -� ANNUAL RAINFALL' W 125 7s e0 1.5 FT. MA BURIM FABRIC FLOW MAINTENANCE: 1. INSPECT THE FABRIC BARRIER AFTER STORM EVENTS. AND MAKE NEEDED REPAIRS IMMEDIATELY. 45 1 FT. 2. REMOVE SEDIMENT FROM THE POOL AREA TO PROVIDE STORAGE FOR THE NEXT STORM. AVOID COMPACTED FI DAMAGING OR UNDERCUTTING THE FABRIC DURING SEDIMENT Fr. 300 rs 4so C B C C B C D A A B B r J u ., u • ro F0 16A I aa•a• • hM3.\ 1 '� :,.•�1.: /,% �'�l!!��!!��•.. ,,. !' •ten �'. 45 - / / %! ✓, /1 /. ! !i ./. is i. /, // - - . 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