Poplin Meadows - SSW-SuppEZ-20170329-DEMLR-SW

QuantityInfiltration SystemBioretention CellWet Pond 1Stormwater WetlandPermeable PavementSand FilterRainwater HarvestingGreen RoofLevel Spreader-Filter StripDisconnected Impervious SurfaceTreatment SwaleDry PondApplicant:Name and Title:Organization:Street address:City, State, Zip:Phone number(s):Email:DesignerCertification Statement:Signature of DesignerDateEmail:231 Post Office Drive Suite B-8Indian Trail, NC 28079704 882 1700 ex 221Company:Contact:Mailing Address:City, State, Zip:Project Name:AddressCity / TownLiquid Management, LLCCody TurnerPoplin MeadowsIndian Trail, NC6008 Bonterra Village WaySUPPLEMENT-EZ FORM COVER PAGESealviolations as well as a report being made to my professional board. - that the information provided in the form is, to the best of my knowledge - that the engineering plans, specifications, operation and maintenancethe information provided here.I am aware that there are significant penalties for submitting falseinformation including the possibility of fines and imprisonment for knowing and belief, true, accurate, and complete; andagreements and other supporting information are consistent with I certify, under penalty of law: that this Supplement-EZ form and all supportinginformation were prepared under my direction or supervision; Designer information for this project:Location(s)Please indicate the types, quantities and locations of SCMs that will be used on this project:[e-mail] number(s):Michael Theberge - Project ManagerBohler Engineering1927 South Tryon St. Suite 310Charlotte, NC 28203980 272 [e-mail] Page111:26 AM 7/2/2018043610M I C H AEL A. THEBERGESEALENGINEERPROFESSIONA L
NORTH CAROLIN A 6/6/186/6/2018
WET POND1 Drainage area number1 Total coastal wetlands area (sq ft)n/a - Parking / driveway (sq ft)21384 sfTotal surface water area (sq ft)17380 sf - Sidewalk (sq ft)14000 sfTotal drainage area (sq ft)405253 sf - Roof (sq ft)99891 sfBUA associated with existing development (sq ft) sf - Roadway (sq ft)53532 sfProposed new BUA (sq ft)201307 sf - Other, please specify in the comment box below (sq ft) 12500 sf Percent BUA of drainage area49%Total BUA (sq ft)201307 sfDesign rainfall depth (in)1.0 inMinimum volume required (cu ft)17607 cfDesign volume of SCM (cu ft)77413 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)?3:1#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?Drawdown Orifice#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)32166 cf#6 Elevation of top of shelf (fmsl)623.50#2 Average depth of the main pool (feet)4 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)618.50 #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)60 hrs#2 Elevation of the top of the temporary pool (fmsl)629.50 #7 Does the orifice drawdown from below the top surface of the permanent pool?No#3 Depth provided for sediment storage (inches)12 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)2689#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 embankmentiris virginia#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)42 in#5 Does water flow out of the forebay in a non-erosive manner?Yes#5 Clean-out depth for forebay (inches)12 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):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 placed during construction to improve flow path. Rip rap forebay berm will be constructedfor entire widthl of vegetated shelf (submerged), shall use a mixture of Iris Virginia (blue iris), Acorus Subcordatum (sweetflag) and saururus cernuus (lizard's tail)ADDITIONAL 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 Pond211:26 AM 7/2/2018