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Home My WebLink AboutSW3220803_Supplement-EZ Form_20230425SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Cresswind - Phase 4 2 Project Area ac 49.19 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 1.6 5 Is this project High or Low Density? High 6 1 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of ve etated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? Yes 9 Is BUA other that as listed in .1 0034 c-d out of the setback? Yes 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 1 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 lRainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-FS 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 IStormFilter 0 24 Silva Cell 0 25 Bayfilter 0 26 Filterra 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Matthew S. Kiker 28 Organization: Thomas & Hutton 29 Street address: 1020 Euclid Avenue 30 City, State, Zip: Charlotte, NC 28203 31 Phone numbers : 980-201-5507 32 Email: kiker.m@tandh.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. Seal Signature of Designer Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 Is all/part of this project subject to previous rule 3 versions? No CLICK TO LOAD FORM DRAINAGE AREA INFORMATION ENTIRE SITE POND 05 4 Type of SCM N/A WET POND 5 Total BUA in project (sq ft) 1177540 sf 1177540 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft) 735000 sf 735000 sf 7 New BUA outside of subdivided lots (subject to permitting) (so 442540 sf 442540 sf 8 Offsite - total area (sq ft) sf sf 9 Offsite BUA (sq ft) sf sf 10 Breakdown of new BUA outside subdivided lots: Parking (sq ft) 183750 sf 183750 sf Sidewalk (sq ft) 62291 sf 62291 sf Roof (sq ft) Roadway (sq ft) Future (sq ft) Other, please specify in the comment box below (sq ft) 196499 sf 196499 sf sf sf 11 New infiltrating permeable pavement on subdivided lots (sq ft) sf sf 12 New infiltrating permeable pavement outside of subdivided lots (sq ft) Exisitng BUA that will remain (not subject to permitting) (sq ft) sf sf 13 sf sf 14 Existing BUA that is already permitted (sq ft) sf sf 15 Existing BUA that will be removed (sq ft) sf sf 16 Percent BUA 55% 55% 17 Design storm (inches) 1 in. 1 in. 18 Design volume of SCM (cu ft) 95975 cf 95975 cf 19 Calculation method for design volume Simple Simple ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the 1drainage area(s): WET POND 1 Drainage area number Pond 05 2 GE Design volume of SCM (cu ft) 95975 cf L MDC FROM 02H .1050 Is the SCM sized to treat the SW from all surfaces at build -out? 4es 3 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 31 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-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 dewatering the SCM for maintenance? DRAWDOWN ORIFICE 101 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)? No 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 16 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensed professional? WET POND MDC FROM 02H .1053 Yes SA/DA 18 Method used 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) 569.50 21 Elevation of the main pool bottom -(top of sediment removal) (fmsl) 570.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 574.00 23 Elevation of the permanent pool (fmsl) 574.50 24 Elevation of the top of the vegetated shelf (fmsl) 575.00 25 Elevation of the temporary pool (fmsl) 576.22 26 Surface area of the main permanent pool (square feet) 37629 27 Volume of the main permanent pool (cubic feet) 136114 cf 28 Average depth of the main pool (feet) 3.95 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 1141.0 ft 31 If using equation 3, width of submerged veg. shelf (feet) 3.0 ft 32 Volume of the forebay (cubic feet) 26058 cf 33 Is this 15-20 % of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 54 in 35 Design volume of SCM (cu ft) 95975 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 4. in 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? No 43 Depth of forebay at entrance (inches) 66 in 44 Depth of forebay at exit (inches) 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) 61 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 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 Bermuda 541 Has a 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):