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Home My WebLink AboutSW4191202_EZ Wet Pond Spreadsheet_1/20/2020WET POND area number 2T sign volume of SCM (cu Boni mnr eonu nau insn 31 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H: V)? 3:1 6 Does the SCM have retaining walls, gabion wa[is or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewstaring the SCM for maintenance? Drawdown Orifice 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat ccm ply with General MDC (10)? Yes 74 Is there an O&M Agreement that complies with General MDC (11)? Yes 15 Is there an O&M Plan that complies with General MQC (12)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensed professional? Yes Iwr-r nnNn runr PRniu row 9n53 18 Method used SA IDA 19 Has a stage/storage table been provided in the calculations? Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (frnsl) 807,00 211 Elevation of the main pool bottom -(top of sediment removal) (fmsl) 808,00 221 Elevation of the bottom of the vegetated shelf (fmsi) $11.50 23 Elevation of the permanent pool (fmsl) 812,00 24 Elevation of the top of the vegetated shelf (fmsl) 812.50 25 Elevation of the temporary pool (fmsl) 813.75 26 Surface area of the main permanent pool (square feet) 3747:1 27 Volume of the main permanent pool (cubic feet) 10959 Cr 28 Average depth of the main pool (feet) 3.32 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 236.0 ft 31 If using equation 3, width of submerged veg. shelf (feet) 3,0 ft 32 Volume of the forebay (cubic feet) 3168 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 12 in 35 Design volume of SCM (cu ft) 11370 cf 36 1 Is the outlet an orifice or a weir? Orifice 371 if orifice, orifice diameter (inches) 12 in 381 if weir, weir height (inches) 391 If weir, weir length (inches) 401 Drawdown time for the temporary pool (days) 3.79 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes 42 Are berms or baffles provided to improve the flow path? No 43 Depth of forebay at entrance (inches) 24 in 44 Depth of forebay at exit (nches) 60 in 45 Does water flow out of the forebay in a non -erosive manner? Yes 46 Width of the vegetated shelf (feet) 6 ft 47 Slope of vegetated shelf (H:V) 6-1 48 Does the orifice drawdown from below the top surface of the permanent pool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- yr, 24-hr storm? Yes 50 51 Are fountains proposed? [If Y, please provide documentation that MDC(9) is met.} Is a trash rack or other device provided to protect the outlet system? No Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes 53 Species of turf that will be used on the dam and embankment Tall Fescue 54 as a planting plan been provided r the vegetated shetf? Yes ADDITIONAL INFORMATION Please use this space to provide any additional information about the 55 wet ponds}: f Wet Pond 1 2:17 PM 1/17/2020