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HomeMy WebLinkAboutNCC230029_Site Plan or Location Map_20230105Steel Post Wire ties 8' Max. Standard Strength fabric with wire fence Wire 6' Max. Extra strength fabric without wire fence Wire Fen ce Steel Post 18 24" pq., 1 8" down & 4" forward along the tr nch I Filter Fabric Construction: CROSS SECTION VIEW 1. Construct the sediment barrier of standard strength or extra strength synthetic filter fabrics. 2. Ensure that the height of the sediment fence does not exceed 24 inches above the ground. (Higher fences may impound volumes of water sufficient to cause failure of the structure) Maintenance: 3. Construct the filter fabric from a continuous roll cut to the length of the barrier to avoid joints. When joints are necessary, securely fasten the 1 Inspect sediment fences at least once a week and after each 1 inch or greater filter cloth only at a support post with 4 feet minimum overlap to the next post. rainfall. Make any required repairs immediately. 4. Support standard strength filter fabric by wire mesh fastened securely to the upslope side of the posts. Extend the wire mesh support to the 2 Should the fabric of a sediment fence collapse, tear, decompose, or become bottom of the trench. Fasten the wire reinforcement, then fabric on the upslope side of the fence post. Wire or plastic zip ties should have a ineffective, replace tt promptly. minimum 50 pound tensile strength. 3. Remove sediment deposits as necessary to provide adequate storage volume 5. When a wire mesh support fence is used, space posts a maximum of 8 feet apart. Supports should be driven securely into the ground a for the next rain and reduce pressure on the fence. Take care to avoid minimum of 24 inches. undermining the fence during cleanouts. 6. Extra strength filter fabric with 6 foot post spacing does not require a wire mesh support fence. Securely fasten the filter fabric directly to posts. 4 Remove all fencing materials and unstable sediment deposfts and bring the Wire or plastic zip ties should have a minimum of 50 pound tensile strength. area to grade and stabilize tt after the contributing drainage area has been 7. Excavate the trench approximately 4 inches wide and 8 inches deep along the proposed line of the posts and upslope from the barrier. properly stabilized. 8. Place 12 inches of fabric along the bottom and side of the trench. 9. Backfill the trench with soil placed over the filter fabric and compact. Thorough compaction of the backfill is critical to silt fence performance. 10. Do not attach filter fabric to existing trees. MAINTENANCE OF EROSION AND SEDIMENTATION CONTROL MEASURES FOR LOT CONSTRUCTION General - All measures will be inspected and corrections made after runoff producing rainfalls, or at least once per week minimum. The builder will insure that the construction activities on any particular lot do not adversely affect any of the installed erosion control measures. If lot construction dictates, measures will be relocated on the lot to insure that the potential for sedimentation runoff is eliminated as much as possible. Silt fences and gravel construction entrances will be maintained as suggested in the erosion control manual. Sodding, seeding and mulching will be maintained to insure proper ground stabilizing cover. Gravel Construction Entrance - The gravel pad should remain in a condition to prevent mud or sediment from leaving the construction site. This may require periodic topdressing with 2-inch stone. After each rainfall, inspect any structure used to trap sediment and clean it out as necessary. Immediately remove all objectionable materials spilled, washed, or tracked onto public roadways. Silt Fence - Sediment fences should be inspected at least once a week and after each rainfall event. Any repairs should be made immediately. Damaged or decomposed fabric should be replaced promptly. Any sediment deposits that build up against the fence should be removed and disposed of properly to insure that the removed sediment does not wash back against the fence. Adequate storage volume should be provided for behind the fence at tall times. Take care to not undermine the fence during cleanout operations. Sodding - The sod should be properly maintained to insure that the grass take holds in the areas being secured. The sod should be watered as necessary to maintain adequate moisture in the root zone and prevent dormancy of the sod. The sod should not be mowed to close, since this could inhibit adequate growth and stabilization of the root bed. The sod should be limed and fertilized as per soil type recommendations and type of grass recommendations when and if possible. Grassing and Mulching - The area to receive grassing and mulching should be properly fertilized and limed as necessary as an initial step in soil preparation. Once the grassing has been placed, the area should be maintained as needed to insure that all areas are germinating properly. Any bare areas should be repaired, and reseeded as soon as possible. If the time of year does not permit the establishment of a permanent grass, then a temporary grassing should be used until the growing season permits the use of a permanent grass. Wattles - Wattles shall be inspected after significant rainfall events. Rills or gullies upslope of the wattle and any undercutting is to be repaired. Sediment deposits that impair the filtration capability of the wattle shall be removed when the sediment reaches one-third of the wattles functional freeboard height. Removed sediment shall be deposited within the project in such a way that the sediment is not subject to erosion by wind or water. Reinforced Silt Fence Outlet - Remove sediment deposits as necessary to provide adequate storage volume for the next rain to reduce pressure on the fence/outlet. Take care to avoid undermining the fence during cleanout. Remove and replace stone as necessary as it becomes clogged with sediment. Remove all fencing materials and unstable sediment deposits and bring the area to grade and stabilize it after the contributing drainage area has been properly stabilized. I ..\NC-Environmental.jpeg L SILT FENCE Filter Fabric PA GE' \ Backfill trench /1 and Compact thoroughly I _ 1 Upslope 4 I♦ Min: 8" Min. I DA TE: PAGE: u 4' MIN. SILT FENCE TOP OF SILT FENCE MUST BE AT LEAST ABOVE THE TOP OF THE WASHED STO STEEL FENCE P ST WIRE FEN HARDWARE CIL TH FILTER OF WASHED STONE, BURY WIRE FENCE AND HARDWWE CLOTH I ..\NC-Envircnmental.jpeg L ffittfl FRONT VIEW BURY WIRE FENCE, FILTER FABRIC, AND HARDWARE STEEL FENCE PO(;T CLOTH IN TRENCH SET MAX 2' APART MIN. 18" INTO SOLID T FILTER FABRIC GROUND / ON GROUND NOTES: 1. Hardware cloth and gravel should overlay the sift fence at least 12 inches. 2. Stone outlets should be placed on low elevation areas of silt fence and based on field conditions. MAINTENANCE: 1. Per NCG-01, inspect outlet at lest once a week and after each 1 inch BURY 6" OF UPPER EDGE O or greater rainfall event. Complete any required repairs immediately. F2. Freshen stone when sediment accumulation exceeds 6 inches. FILTER FABRIC IN TRENCH 3. Keep mesh free of debris to provide adequate flow. 4. Remove sediment when haft of stone outlet is covered. 5. Replace stone as needed to facilitate de -watering. SILT FENCE OUTLET SEDIMENT FENCE INSTALLATION USING THE SLICING METHOD Instead of excavationg a trench, placing fabric and then backfilling trench, sediment fence mayh be installed using specially designed equipment that inserts the fabric into a cut sliced in the ground with a disc (Figure 6.62b). INSTALLATION SPECIFICATIONS 1. The base of both end posts should be at least one foot higher than the middle of the fence. Check with a level if necessary. 2. Install posts 4 feet apart in critical areas and 6 feet apart on standard applications. 3. Install posts 2 feet deep on the downstream side of the silt fence, and as close as possible to the fabric, enabling posts to support the fabric from upstream water pressure. 4. Install posts with the nipples facing away from the silt fabric. 5. Attach the fabric to each post with three ties, all spaced within the top 8 inches of the fabric. Attach each tie diagonally 45 degrees through the fabric, with each puncture at least 1 inch vertically apart. Also, each tie should be positioned to hang on a post nipple when tightened to prevent sagging. 6. Wrap approximately 6 inches of fabric around the end posts and secure with 3 ties. 7. No more than 24 inches of a 36 inch fabric is allowed above ground level. 8. The installation should be checked and corrected for any deviations before compaction- 9- Compaction is vitally important for effective results. Compact the soil immediately next to the silt fence fabric with the front wheel of the tractor, skid steer, or roller exerting at least 60 pounds per square inch. Compact the upstream side first, and then each side twice for a total of 4 trips. MAINTENANCE Inspect sediment fences at least once a week and after each rainfall. Make any required repairs immediately. Should the fabric of a sediment fence collapse, tear, decompose or become ineffective, replace it promptly. Remove sediment deposits as necessary to provide adequate storage volume for the next rain and to reduce pressure on the fence. Take care to avoid undermining the fence during cleanout. Remove all fencing materials and unstable sediment deposits and bring the area to grade and stabilize it after the contributing drainage area has been properly stabilized. The Slicing Method Figure 6.62b Ponding height max. 24" POST SPACING: 6' max. on open runs Attach fabric to upstream max. on pooling areas side of post FLOW POST DEPTH: 2 feet Top of FabricBelttop 8" Diagonal attachment doubles strength.ATTACHMENT DETAILS•Gather fabric at posts, if needed.*Utilize three ties per post, all within top 8" of fabric.*Position each tie diagonally, puncturing holes vertically a minimum of 1" apart- h t t I d No more than 24" of a 36" fabric eac ie on a pos nipp a anis allowed above ground. tighten securely.Drive over each side of silt *Use cable ties (50lbs) or soft wire.fence 2 to 4 times with device exerting 60 p.s.i. or greater Roll of silt fence Post Operation installed after compaction Fabricabove Silt Fence Oground 8" 12„Horizontal chisel point Slicing blade Completed (3" width) (0.7" width) Installation Vibratory plow is not acceptable because of horizontal compaction 11 [111 rEll rf 11 IMI I mll� FLOW DIRECTION � SILT FENCE SILT FENCE OUTLET CONSTRUCTION ENTRANCE CURB INLET ..\NC-Environmental.jpeg L Notes: 1. If needed, Tree Protection fencing should be installed along the buffer zone, wetland boundary and/or around protected trees, providing a radius of at least 1.25 feet for each inch of trunk diameter. 2. Install Silt Fence on the low elevation sides of each lot. Install Silt Fence outlets shown on schematic/diagram and field adjusted, if necessary, for placement at low points. If lots are contiguous and have different land owners or builders, each lot should have individual Sift Fences. 3.1nstall required Silt Fence within 10 feet of property line to ensure there is no conflict with septic system. It is the responsibility of the builder to ensure the installation of sediment control measures does not impact the septic system and repair area(s). 4. At least one Construction Entrance/Exit is to be installed per lot. 5. Waste bins and other areas dedicated for managing building material waste shall be at least 50 feet away from storm drain inlets or drainage ditches unless ft can be shown that no other alternative exists. If this separation cannot be achieved, these areas must be contained behind Sift Fence. 6. Inlets downstream of disturbances should be protected, streets should be swept when sediment from the construction activity is present. 7. Details for Sift Fence, Silt Fence Outlets, Construction Entrances and other measures are provided on additional sheets. Erosion and sediment control details are not drawn to scale. TYPICAL LOT LAYOUT WITH CURB AND GUTTER Silt Sock/ Wattle Silt Sock/ Wattle NOTE: FLOWZ' 3 Area to be FLOW 3" Area to be 1. Other materials providing equivalent protection Protected - - I Protected against erosive velocities may be substituted for use in silt socks or wattles. 2. Fill silt sock/wattle netting uniformly with compost 12" Min. �.� 2" x 2" 12" Min. s� 2" x 2" to the desired length such that logs do not deform. Stakes Stakes 3. Silt sock/Wattle(s) should be installed parallel to SECTION and a minimum of 10 feet beyond the toe of a SECTION graded slope. Sift Sock/Wattle(s) located below flat areas should be located at the edge of the land disturbance. The ends of the silt sock/wattle(s) should be turned slightly upslope to 'c�0ep� '�(O 00. prevent runoff from going around the end of the 0 silt sock/wattle(s). --- I 4. Oak or other durable hardwood stakes with a 2 inch x 2 inch cross section should be driven = III vertically plumb, through the center of the silt ��WVV sock/wattle. Stakes should be placed at a _ maximum interval of 4 feet or a maximum interval Trench in = of 8 feet tithe sift sock/wattle is placed in a 4 inch Wood Mulground 4" Min. trench. To 1 /2 height of log 5. In the event staking is not possible (ie. when UNTRENCHED INSTALLATION ENTRENCHED INSTALLATION* socks/wattles are used on pavement) heavy -THISAPPLICATIONMAY NOT BEUSED WITHCOMPOSTSOCKSSMALLER THAN I2". COrlcreteblOCksShallbeDsedbehindthesilt sock/wattle to hold ft in place during runoff events. ISOMETRIC VIEW MAINTENANCE: 1. Inspect silt sock/wattle at least weekly and after h 1 i h t i fall R Mulch or Compost for Entrenched Socks Area To Be Pr Sheet Flow Silt Sock Wattle Work Area eac Inc or grea er ram a . emove accumulated sediment and any debris as needed to allow for adequate flow. 2. Silt sock/Wattle must be replaced d clogged or torn. 3. If ponding becomes excessive, the sift sock/wattle may need to be replaced with a larger diameter or a different measure. 4. Reinstall if damaged or dislodged. 5. Silt socks/wattles shall be inspected until land disturbance is compete and the area above the measure has been permanently stabilized. ..\NC -Environmental. inea COMPOST SOCK INITIAL FLOW RATES te6401Post Sock 8 Inch (200 12 Inch 18 Inch 24 Inch 32 Inch (750 Design Diameter nm) (300 nm) (450 nm) (600 nm) nm) Maximum Slope 600 Feet 750 Feet 1,000 1,300 1,650 Length (<2%) (183 m) (229 m) Feet Feet Feet (305 m) (396 m) (500 m) Hydraulic Flow 7.5 11.3 15.0 22.5 30.0 Through Rate gpm/ft gpm/ft gpm/ft gpm/ft gpm/ft (94 (141 (188 (281 (374 1/m/m) I/m/m) I/m/m) I/m/m) I/m/m) GROUND STABILIZATION SITE AREA STABILIZATION EXCEPTIONS DESCRIPTION TIME FRAME PERIMETER DIKES, 7 DAYS NONE SWALES, DITCHES & SLOPES HIGH QUALITY 7 DAYS NONE WATER ZONES (HQW) SLOPES STEEPER 7 DAYS IFSLOPES ARE THAN 3:1 10' OR LESS IN LENGTH AND ARE NOT STEEPER THAN 2:1, 14 DAYS ARE ALLOWED SLOPES 3:1 OR 14DAYS 7 DAYSFOR FLATTER SLOPES GREATER THAN 50' IN LENGTH ALL OTHER AREAS 14DAYS NONE (EXCEPT WITH SLOPES FOR PERIMETERS FLATTER THAN 4:1 AND HQW ZONES) SODDING LAY SOD IN A STAGGERED PATTERN. BUTT THE STRIPS TIGHTLY AGAINST EACH OTHER- 04-DO NOT LEAVE SPACES AND DO NOT OVERLAP. A SHARPENED MASON'S TROWEL IS A HANDY TOOL FOR TUCKING DOWN THE ENDS AND TRIMMING PIECES. BUTTING -ANGLED ENDS CAUSED BYTHEAUTO- INCORRECT MATIC SOD CUTTER MUST BE MW MATCHED CORRECTLY. CORRECT ROLL SOD IMMEDIATELY TO WATER TO A DEPTH OF 4" MOW WHEN THE SOD IS ACHIEVE FIRM CONTACT AS NEEDED. WATER WELL ESTABLISHED - IN 2-3 WITH THE SOIL, AS SOON AS THE SOD IS WEEKS. SET THE MOWER LAID. HIGH (2"-3"). APPEARANCE OF GOOD SOD JJ SHOOTS -OR GRASS BLADESGRASS SHOULDBEGREENAND IHEALTHY,MOWED AT A2"-3" CUTTING HEIGHTCH - GRASS CLIPPINGSAND DEAD LEAVES, UPTO 1/2"THICKROOTZONE-BOILAND ROOTS SHOULD BE 1/2"- 3WTHICK,WHT DENSE ROOT MAT FOR STRENGTH RUCTION SCHEDULE btain all necessary permits and plan approvals. Erosion and Sediment Control &SC) permit and a Certificate of Coverage (COC) must be obtained before any land disturbing activities :cur. A copy of the E&SC permit, the COC and a hard copy of the plan must be kept on site, preferably in a ;rmits box, and accessible during inspection. stall gravel construction entrances first, then silt fences, reinforced silt fence outlets and wattles. nish clearing and grubbing any necessary areas on the lots as they are started. -gin lot grading and excavation activities -gin or continue with house construction activities. nish all rough grading and house construction. stall driveways, walks and patios. gin fine grading of lot areas nal grassing, mulching and stabilizing of lot. In most cases this will involve the installation of sod on the lot. ie silt fence will remain in place until the lot is sodded or grassing is stabilized and takes hold. ie contractor shall conduct self -inspections of the erosion and sedimentation control measures and complete e following combined self -inspection form found on the DEMLR website tps:Hfiles.ne.gov/nedeg/Energy%2OMineral%20and%2OLand%2OResources/Stormwater/NPDES%20 -neral%20Permits/DEMLR-CSW-Monitoring-Forms-Rev-August-8-2019.pdf. Twelve months of complete Ispection forms shall be kept on site and available for inspection at all times. It is recommended a copy be opt in a permits box. (GS 113A-54.1 (e), 15A NCAC 04B.0131, NCGOI Part III Sections A and B) elf -inspections for erosion and sedimentation control measures are to be performed at least once every seven alendar days and within 24 hours of every rain event of greater than 1 inch. Any needed repairs shall be Lade immediately to maintain measures as designed. All ESC measures shall be maintained as specified in le construction details on this plan. A rain gauge shall be installed at the project site for monitoring. tspection and final acceptance letters. When the project is complete, the permittees shall contact DEMLR to lose out the E&SC Plan. After DEMLR informs the permittee of the project close out, via inspection report, to permittee shall visit "deq.nc.gov/NCGO1" to submit an electronic Notice oftermination (e-NOT). A $100 inual general permit fee will be charged until the e-NOT has been filled out. A '°SELF -INSPECTION REPORT FOR LAND DISTURBING ACTIVITY AS REQUIRED BY NCGS 113A-54.1"IS AVAILABLE FOR USE. IT CAN BE COMPLETED BY HAND OR COMPLETED AS AN EXCEL SPREADSHEET. AN ALTERNATIVE IS TO MAKE NOTATIONS ON THE COPY OF THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN THAT IS KEPT ON THE PROJECT SITE. RULE 15A NCAC 04B. 0131 STATES THAT "...DOCUMENTATION SHALL BE ACCOMPLISHED BY INITIALING AND DATING EACH MEASURE OR PRACTICE SHOWN ON A COPY OF THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN OR BY COMPLETING, DATING AND SIGNING AN INSPECTION REPORT THAT LISTS EACH MEASURE, PRACTICE OR DEVICE SHOWN ON THE APPROVED EROSION AND SEDIMENTATION CONTROL PLAN." General Erosion Control Notes 1. Only the areas shown shall be disturbed. 2. All disturbed areas shall be grassed and mulched as soon as possible and maintained until pemanent cover is established. suant to G.S.113A(3), provisions for permanent ground ?r sufficient to restain erosion must be accomplished for disturbed areas within 14 working days or 90 calender days ichever is shorter) following completion of construction. PAGE 1 of 2 TOTAL DISTURBED ACREAGE: 4.82 ACRES LOT EROSION CONTROL PLAN OTS 227-231, 255-257, 262, 263, 289, 290, 296-299, 305-307 8c 318-323 HIGHCROFT PHASE 4, PART 2 FOR DREAMFINDERS HOMES, LLC 71ST TOWNSHIP CUMBERLAND CO., N.C. SCALE: 1"= 100' DECEMBER 2022 GRAPHIC SCALE IN FEET -100 -50 0 100 200 300 IOORMAN, KIZER& REITZEL, INC. 115BROADFOOTAVE. FAYETTEVILLE, N.C. PHONE tale) 484-5191 FAX (ain) 484-0388 LICENSE #: F-01nA LAST SAVED:12/20/2022 7:52 AM LAST PLOTTED:12/20/2022 8:10 AM PLOTTED BY: Dennis Gilbert FILENAME: G:ACURRENT JOBS\H & H CONSTRUCTORS\12-1367-09 HIGHCROFT - EROSION CONTROL\PLANS\EC-HIGHCROFT.PHASE4-PART 2-LOTS 227-231, 255-257---.DWG