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8"Diversion Ridge <br />15' <br />6" Depth Coarse Aggregate <br />6"Geotextile Fabric <br />Public Road <br />10' <br />Min. <br />6" Depth Coarse Aggregate <br />Over Geotextile Fabric10'10'50' Min. (Small Sites -Less than 2 Acres) <br />150' Min. (Large Sites - 2 Acres or Larger)12' Min. (Small Sites)20' Min. (Large Sites)2% Grade <br />PROFILE <br />PLAN VIEW <br />6/26/18 <br />CITY OF SOUTH BENDItemRevision <br />STANDARD <br />EFFECTIVE DATE: <br />REF STD SPEC SEC <br />APPROVED/REVISED BY THE BOARD OF PUBLIC WORKS <br />STANDARDS FOR DESIGN <br />AND CONSTRUCTION <br />Kara M. Boyles, Ph.D., P.E. Date <br />TEMPORARY GRAVEL CONSTRUCTION ENTRANCE 7-1 <br />7-1, 7-2 <br />June 26, 2018 <br />SECTION 7 - EARTHWORK & EROSION AND SEDIMENT CONTROL <br />REQUIREMENTS: <br />Material: 2-3 in. dia. washed stone (INDOT CA No. 2) over a stable foundation. <br />Thickness: 6 in. minimum. <br />Width: See minimums on plan below or full width of entrance/exit roadway, whichever is greater. <br />Length: 50 ft. minimum for small sites (less than 2 acres); 150 ft. minimum for large sites (2 acres and larger). <br />The length can be shorter for small sites such as for an individual home, but shall be of sufficient length to <br />prevent tracking. <br />Washing facility (optional): Level area with 3 in. washed stone minimum or a commercial rack, and waste <br />water diverted to a sediment trap or basin. <br />Geotextile fabric underliner: Required to provide greater bearing strength. <br />INSTALLATION: <br />1. Avoid locating on steep slopes or at curves in public roads. <br />2. Remove all vegetation and other objectionable material from the foundation area, and grade and crown <br />for positive drainage. <br />3. If slope towards the road exceeds 2%, construct an 8 in. high diversion ridge with 3:1 side slopes across <br />the foundation area about 15 ft. from the entrance to divert runoff away from the road (see profile). <br />4. Install culvert pipe under the pad if needed to maintain proper public road drainage. <br />5. Place stone to dimensions and grade shown in the erosion/sediment control plan, leaving the surface <br />smooth and sloped for drainage. <br />6. Divert all surface runoff and drainage from the stone pad to a sediment trap or basin. <br />MAINTENANCE: <br />1. Inspect entrance pad, sediment disposal area, and all other erosion control measures once every seven days and <br />within 24 hours following each 1 2" storm event or heavy use. Required repairs should be completed immediately. <br />2. Reshape pad as needed for drainage and runoff control. <br />3. Topdress with clean stone as needed. <br />4. Immediately remove mud and sediment tracked or washed onto public roads by brushing or sweeping; at a minimum <br />this should be performed daily. Flushing should only be used if the water is conveyed into a sediment trap or basin. <br />5. Repair any broken road pavement immediately.