Poplin Meadows - SSW-SuppEZ-20170329-DEMLR-SW (2)

WET POND1 Drainage area number1 Total coastal wetlands area (sq ft)n/a - Parking / driveway (sq ft)21384 sfTotal surface water area (sq ft)n/a - Sidewalk (sq ft)10000 sfTotal drainage area (sq ft)332258 sf - Roof (sq ft)99891 sfBUA associated with existing development (sq ft)216307 sf - Roadway (sq ft)57532 sfProposed new BUA (sq ft)216307 sf - Other, please specify in the comment box below (sq ft) 17600 sf Percent BUA of drainage area65%Total BUA (sq ft)216307 sfDesign rainfall depth (in)1.0 inMinimum volume required (cu ft)17607 cfDesign volume of SCM (cu ft)77410 cf#1 Is the SCM sized to treat the SW from all surfaces at build-out?Yes#7 If applicable, with the SCM be cleaned out after construction?Yes#2 Is the SCM located on or near contaminated soils?No#8 Does the mainetenance access comply with General MDC (8)?Yes#3 What are the side slopes of the SCM (H:V)?2:1#9 Does the drainage easement comply with General MDC (9)?Yes#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No#10 If the SCM is on a single family lot, does the plat comply with General MDC (10)?#4 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes#11 Is there an O&M Agreement that complies with General MDC (11)?Yes#5 Is there a a bypass for flows in excess of the design flow?Yes#12 Is there an O&M Plan that complies with General MDC (12)?Yes#6 What is the method for dewatering the SCM for maintenance?Pump (preferred)#13 Was the SCM designed by an NC licensed professional?Yes#1 Method usedSA/DA#6 Width of the vegetated shelf (feet)6 ft#1 Surface area of the main permanent pool (square feet)8754 sf#6 Location of vegetated shelfSubmerged#1 Volume of the main permanent pool (cubic feet)26793 cf#6 Elevation of top of shelf (fmsl)623.50#2 Average depth of the main pool (feet)3 ft #6 Elevation of bottom of shelf (fmsl)622.50#2 Was the vegetated shelf included in the calculation of average depth? Yes #6 Slope of vegetated shelf (H:V)6:1#2 Elevation of the bottom of the permanent pool (fmsl)617.50 #7 Diameter of drawdown orifice (inches)2.0 in#2 Elevation of the top of the permanent pool (fmsl)623.50 #7 Drawdown time for the temporary pool (hours)59.66#2 Elevation of the top of the temporary pool (fmsl)625.41 #7 Does the orifice drawdown from below the top surface of the permanent pool?No#3 Depth provided for sediment storage (inches)6 in#8 Does the pond minimize impacts to the receiving channel from the 1-yr, 24-hr storm? Yes#4 Are the inlet(s) and outlet located in a manner that avoids short-circuiting?Yes #9 Are fountains proposed?No#9 If yes, is documentation provided per Wet Pond MDC (9)?#10 Is a trash rack or other device provided to protect the outlet system? Yes#5 Volume of the forebay (cubic feet)4436#11 Are the dam and embankment planted in non-clumping turf grass?Yes#5 Is this 15-20% of the volume in the main pool?Yes#11 Species of turf that will be used on the dam and embankmentBermuda#5 Depth of forebay at entrance (inches)48 in#11 Describe the planting plan for the vegetated shelf:#5 Depth of forebay at exit (inches)36 in#5 Does water flow out of the forebay in a non-erosive manner?Yes#5 Clean-out depth for forebay (inches)6 in#5 Will the forebay be cleaned out when the depth is reduced to less than the above? YesPoplin MeadowsBreak down of BUA in the drainage area (both new and existing):COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAMStormwater program(s) that apply (please specify):Non coastal SWM Wet Pond SCM17,600 BUA is classified as "off-site roadway widening" associated with Bonterra Village Way road widening along project frontage.Equation #2 for average depth was used. Vegetated shelf is being included in the average depth calculation.WET POND MDC FROM 02H .1053#4 Describe any measures, such as berms or baffles, that will be taken to improve the flow path:3 baffles will be in place, a rip rap berm will be constructed between the forebay and the main poolWhite turtlehead - 198 unitsCardinal flower - 211 unitsSwamp Milkweed - 169 unitsMinimum 50 units per 200sf of vegetated shelfADDITIONAL INFORMATIONPlease use this space to provide any additional information about this wet pond that you think is relevant to the review:GENERAL MDC FROM 02H .1050THE DRAINAGE AREAWet Pond112:02 PM 8/3/2018