The URL can be used to link to this page

Home My WebLink AboutSW3210701_Supplement-EZ Form_20211020SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Wicker Park 2 Project Area ac 69.15 3 Coastal Wetland Area ac _ 0 4 Surface Water Area ac 1.7 5 Is this project High or Low Density? Both High and Low Density 6 Does this project use an off -site SCM? No NUMBER AND TYPE OF SCMs: 11 Infiltration S stem 0 12 Bioretention Cell 0 13 Wet Pond 3 14 Stormwater Wetland 0 0 0 15 Permeable Pavement 16 iSand Filter Rainwater HarvestingRWH 0 Green Roof 0 _ 0 0 Level spreader -Filter StripLS FS k22 Disconnected Impervious Surface DIS Treatment Swale _ 0 D Pond 0 0 StormFilter Silva Cell 0 _ 0 0 25 113agitter 1 Filterra 26 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Or anization: Stuart Woodard, Project Manager 28 McAdams 29 Street address: 3430 Torin don Way, Suite 110 30 City,State Zip: Charlotte NC 28277 31 Phone num 540. 577. 3607 32 Email: woodard@mcadamsco,com Certifcalion 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. 7" GINS rk.AFJ6d .•. Signature of Designer Date io_ 1g Zoz1 DRAINAGE AREAS 1 'is this a high densitX project? 2 1 If so, number of drainage areas/SCMs Yes 3 3 Does this project have low density areas? Yes 4 If so number of low density drainage areas 1 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 2 3 ILD 1 4 Type of SCM N/A Wet Pond Wet Pond Wet Pond Bypass Area 5 Total drainage area (sq ft 3 012 113 442 822 275917 1028016 1265358 6 Onslte drainage areas ft 2930790 378353 275917 1011162 1265358 7 Offsite drainage_area (sg ft) 81323 64469 0 16854 0 8 Total BUA in project (sq ft 991674 sf 211456 sf 133828 sf 445873 sf 200517 sf 9 New BUA on subdivided lots (subject to ermitting) (sq ft 584640 sf 68440 sf 84680 sf 296960 sf 134560 sf 10 New BUA not on subdivided lots (subject to ermittin sf 325711 sf 78547 sf 49148 sf 132059 sf 65957 sf 11 Offsite BUA (sq ft 81323 sf 64469 sf sf 16854 sf sf 12 Breakdown of new BUA not on subdivided lots: Parking Jsqft 14293 sf 1865 sf 3283 sf 8863 sf 282 sf Sidewalk (sq ft 66443 sf 10094 sf 11995 sf 31516 sf 12839 sf Roof (sq ft 11267 sf 11267 sf sf sf sf Roadwa . s ft 191160 sf 34411 sf 33871 sf 91680 sf 31199 sf Futuresq ft . 42547 sf 20909 sf sf sf 21638 sf Other, please specify in the comment box below (sq ft sf sf sf sf sf 13 New infiltrating permeable pavement on subdivided lots s ft N/A NIA N/A N/A N/A 14 New infiltrating permeable pavement not on subdivided lots (sq ft N/A N/A N/A N/A N/A 15 Existing BUA that will remain (not subject to ermittinR) (sq ft N/A N/A N/A N/A N/A 16 Existing BUA thAt is already permitted ft N/A NIA N/A N/A NIA 17 Existing BUA that will be removed (sq ft NIA N/A NIA N/A N/A 18 Percent BUA 33% 48% 49% 43% 16% 19 Design storm inches N/A 1.0 in 1.0In 1A in NIA 20 Design volume of SCM cu ft NIA 17704 cf 11187 cf 37724 cf NIA 21 lCalculation method for design volume NIA SAIDA SAIDA SAIDA NIA ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage areas : WET POND 1 1.7raina a area number 1 2 3 2 Minimum required treatment volume cu ft 17704 of 11197 d 37724 cf GEN R 3 Is the SCM sized to treat the SW from aU surfaces at build -put? Yes Yes Yes 4 Is the SCM located away from contaminated soils? Yes Yes Yes 5 What are the side slopes of the SCM H:V ? 3:1 3:1 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No No No 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear storm)? Yes Yes Yes 6 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) Pump (preferred) Drawdown Orifice 10 If applicable, will the SCM be cleaned out after construction? Yes Yes Yes 11 Does the maintenance access comply with General MDC B ? Yes Yes Yes 12 Does the drains a easement comply with General MDC 9 ? Yes Yes Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC 10 ? N/A N/A N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes Yes Yes 15 Is there an O&M Plan that complies with General MDC 12 ? Yes Yes Yes 16 Does the SCM follow the device specific MDC? Yes Yes Yes 17 Was the SCM desi nerd by an INC licensed rofesslonal? Yes Yes Yes WET PO O MOC FROM 02H.IW3 18 Sizing method used SAIDA SAIDA $AOA 19 Has a stage/storage table been provided in the calculations? Yes Yes Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl 652.00 603.00 596.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 653.00 604.00 597.00 22 Elevation of the bottom of the vegetated shelf fmsl 657.50 609.50 601.50 23 Elevation of the permanent pool fmsl 658.00 610.00 602.00 24 Elevation of the to of the vegetated shelf fmsl 658.50 610.50 602.50 25 Elevation of the temporary pool fmsl 659A3 611-10 603.26 26 Surface area of the main permanent pool (square feet 7664 5866 20095 27 Volume of the main permanent pool cubic feet 25027 cf 19231 cf 70230 cf 28 Average depth of the main pool feet 3.27 ft 3.28 ft 3.49 ft 29 Avers a depth euation used Equation 2 Equation 2 Equation 2 30 If using a uation 3, main pool perimeter feet N/A N/A N/A 31 If using equation 3. width of submerged veg. shelf feet N/A N/A N/A 32 Volume of the foreba cubic feet 3849 cf 3662 cf 11307 cf 33 Is this 15-20% of the volume in the mainpool? Yes Yes Yes 34 Clean -out depth for foreba inches 48 in 48 in 48 in 35 Design volume of SCM cu ft 17704 cf 11187 cf 37724 cf 36 Is the outlet an orifice or a weir? Orifice Orifice Orifice 37 If orifice, orifice diameter (inches) 2 in 1.75 in 3.5 in 38 If weir, weir hei t inches N/A N/A N/A 39 If weir, weir length inches N/A N/A N/A 40 Drawdown time for the temporary pool (days) 2.32 2.18 2.01 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes Yes Yes 42 Are berms or baffles provided to improve the flowpath? No No No 43 De th of forebay at entrance inches 60 in 60 in 60 in 44 Depth of forebay at exit inches 54 in 54 in 54 in 45 Does water flow out of the forebay in a non -erosive manner? Yes Yes Yes 46 Width of the vegetated shelf feet loft loft loft 47 Slope of vegetated shelf H:V 10:1 10:1 10:1 48 Does the orifice drawdown from below the top surface of the permanentpool? Yes Yes Yes 49 Does the pond minimize impacts to the receiving channel from the 1 r 24-hr storm? Yes Yes Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC 9 is met, No No No 51 Is a trash rack or other device provided to protect the outlet system? Yes Yes Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes Yes Yes 53 Species of turf that will be used on the dam and embankment Tall Fescue Tall Fescue Tall Fescue 54 Hasa lantin Ian been rovided for the ve etated shelf? Yes Yes Yes ADDITIONAL ORMATION 55 Please use this space to provide any additional information about the wet pond(s): Wet Pond 1 9:31 AM 10/18/2021 LOW DENSITY nislin Riau IRCIVI ENT$f D ENSITY PR 1 Is project below density thresholds set forth In the applicable stormwater rule? Yes Yes 2 Does project maximize dispersed flow and minimize channelization of flow? 3 Has the use of piping, been minimized per .1003(2)(c)? Yes 4 Side slopes of the vegetated conveyances(H:V) (3:1) 5 Maximum velocity in the vegetated conveyances during the 10- ear storm? 4.5 6 Are curb outlet swales proposed? Yes 7 Maximum longitudinal slope of curb outlet swale(s) (% ). 5 % 8 Bottom width of curb outlet swale(s) (feet) 2 ft 9 Maximum side sloe of curb outlet swale s H:V (3:1) 10 Minimum length of curb outlet swale(s) (feet) 100 ft 11 Are treatment swales used instead of curb outlet swales? No 12 Is stormwater released at the edge of the setback as dispersed flow? Yes 13 Have stormwater outlets been designed to Rrevent downslope erosion? Yes 14 JAre variations to rule .1003 proposed? No ADDITIONAL INFORMATION 15 Please use this space to provide any additional information about this low density project: ® Drainage Area (ac)