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Home My WebLink AboutSW6230102_Supplement-EZ Form_20230504SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Tranquil Meadows 2 Project Area ac 21.83 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 is this project H h or Low Dens' High 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1008I4 7 JWkIth of vegetated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? N/A 9 If SUA is proposed in the setback, does it meet NCAC 02H.1003 4 Gd ? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 1 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-F5 20 Disconnected Impervious Surface DI5 21 Treatment Swale 22 Dry Pond StormFilter 23 24 Silva Cell 25 Bayfifter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Street address: Jeffrey A. Nobles, PE 28Organization: LeM King & Associates, RLS, PA 29 1333 Morganton Road, Suite 201 30 City, State, Zip: Fayetteville, NC 28305 31 Phone number(s): 1 Email: 910-483-4300 jnobles@lkanda.com 32 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; anc teat the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. `'�\A1111111l1'd CA = SEAL 31459 Ne � c Date •3.23 DRAINAGE AREAS 1 IIs this a high density roect? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire It9 4 Type of SCM Wet Pond 5 Total drainage area (sq ft 951040 908838 6 Onsite drainage area (sq ft 0 7 Offsite drainage area (sq ft 8 Total BUA in project ft 372337 sf 372337 sf 9 New BUA on subdivided lots (subject to permitting) 1 (sq ft 240000 sf 240000 sf 10permitting) New BUA not on subdivided lots (subject to s sf sf 11 Offsite BUA (sq ft sf sf 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft 5800 sf 5800 sf Sidewalk (sq ft - Roofs ft Roadway sq ft) Future (sq T Other, please specify in the comment box below (sq ft New infiltrating permeable pavement on subdivided lots (sq ft 30661 sf 30661 sf sf sf 95876 sf 95876 sf sf sf sf sf 13 sf sf New infiltrating permeable pavement not on subdivided lots s ft sf sf P1614 15 Existing BUA that will remain (not subject to permitting)s ft sf sf Existing BUA that is already permitted (sq ft sf sf 17 Existing BUA that will be removed s ft sf sf 41 % 1.0 in 38802 cf Simple Method 18 Percent BUA 39% 19 Design storm {inches) 1.0 in 20 Design volume of SCIv1 (cu ft 21 CaiCUlatlon method for design volume Simple Method ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 draina a area(s): WET POND 1 Drainage area number 1 2 Minimum required treatment volume cu ft 38802 cf GENERAL MDC FROM OZH .1 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: ? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? Are the inlets, outlets, and receiving stream protected from erosion -year storm)? Is there an overflow or bypass for inflow volume in excess of the design volume? No 7 Yes 8 Yes 9 What is the method for dewatering the SCM for maintenance? Pum ferred 10 tf 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)? Is there an O&M Agreement that complies with General MDC (11)? Is there an O&M Plan that complies with General MDC (12)? Does the SCM follow the device specific MDC? N/A 14 Yes 15 Yes 16 Yes 17 Was the SCM designed by an NC licensedprofessional? Yes FROM 18 Sizing method used SA1DA 19 Has a stage/storage table been provided in the calculations? Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl Elevation of the main pool bottom (top of sediment removal) (fmsl) Yes 20 217.00 21 218.00 22 Elevation of the bottom of the vegetated shelf (tmsl) 221.50 23 Elevation of the parmanentpool fmsl 222.00 24 Elevation top of the vegetated shelf fmsl 222.50 25 _of -the Elevation of the temporary of fmsl 223.70 26 Surface area of the main permanent pool (square feet 19464 27 Volume of the main permanent pool cubic feet 61450 cf 28 Averse depth of the main pool feet 3.63 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool 22rimeter feet 557.0 ft 31 If using equation 3, width of submerged veg. shelf (feet) 5.0 ft 32 Volume of the foreba cubic feet 10267 of 33 Is this 15-20% of the volume in the mainpool? Yes 34 1 Clean -out deM for foreba inches 48 in 35 Design volume of SCM cu ft 45744 of 36 Is the outlet an orifice or a weir? Crifice 37 If orifice, orifice diameter inches If weir, weir height inches If weir, weir length (inches) Drawdown time for the temporary pool (dc_: =,: Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Are berms or baffles provided to improve the flow pa --h? Depth of fo ay at entrance inches 3 in 38 39 40 2,97 Yes 41 42 No 43 60 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) Slope of vegetated shelf (H:V) Does the orifice drawdown from below the top surface of the permanent pooI? Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? loft 47 10:1 48 Yes 49 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 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 10:10 AM 5/3/2023