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Home My WebLink AboutSW3200903_SuppEZ_20201006SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 lProiect Name Proiect ETARC 3 JCoastal Wetland Area ac 4 Surface Water Area ac 5 Is this project High or Low Density? High 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet n/a 8 Will the vegetated setback remain vegetated? 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? 10 Is streambank stabilization proposed on this project? NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 1 14 Stormwater Wetland 15 Permeable Pavement 16 ISand Filter 17 Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale Dry Pond StormFilter Silva Cell Ba filter Filterra 22 23 24 25 26 FORMS LOADED IDESIGNER CERTIFICATION 27 IName and Title: 28 Or anization: 29 Street address: 30 City, State, Zip: 31 Phone number 32 Email: Carlton Burton, PE Burton Engineering Associates 5950 Fairview Road, Suite 100 Charlotte, NC 28210 7045538881 cburton0burtonena.com Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. Signature of Designer Seal Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of draina a areas/SCMs 1 3 Does this roiect have low densit areas? No 4 F5 If so, number of low densitydrainage areas 0 Is all/part of this project subject to previous rule versions? No FORMS LOADED WET POND 1 Drainage area number 1 2 Minimum required treatment volume cu ft 141309 cf GENERAL MDC FROM 02H .1050 3 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 walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the desi n volume? Yes 9 What is the method for dewatering 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 comply with General MDC 10 ? N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes WET POND MDC FROM 02H .1053 18 Sizing method used SA/DA 19 Has a stage/storage table been provided in the calculations? Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl 826.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 827.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 830.00 23 Elevation of the permanent pool (fmsl) 830.50 24 Elevation of the top of the vegetated shelf (fmsl) 831.00 25 Elevation of the temporary pool (fmsl) 830.76 26 Surface area of the main permanent pool (square feet 105894 27 Volume of the main permanent pool (cubic feet) 416434 cf 28 Average de th of the main pool feet 3.90 ft 29 Average depth equation used Equation 2 30 If usinga uation 3, main pool perimeter (feet) 31 If using equation 3, width of submerged veg. shelf (feet) 32 Volume of the foreba cubic feet 80368 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for foreba inches 12 in 35 Design volume of SCM (cu ft) 282704 cf 361 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) (2) 8" 38 If weir, weir height inches 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 3 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? Yes 43 Depth of f rebay at entrance inches 66 in 44 Depth of forebay at exit (inches) 54 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 ermanentpool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC 9 is met. No 51 Is a trash rack or other device provided to protect the outlet system? 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 54 Hasa planting plan been provided for the vegetated shelf? Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s): Wet Pond 1 4:00 PM 9/9/2020