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Home My WebLink AboutSW5220201_Supplement-EZ Form_20220826SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Bryson's Ridge Subdivision - Phase 1 2 Project Area ac 19.73 Phase 1 Only) 3 Coastal Wetland Area ac 0 4 Surface Water Area ac _ 0.01 5 Is this project High or Low Density? _ _ _ Both High and Low Densit 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4)-� 7 Width of vegetated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback, does It meet NCAC 02H.1003 4 c-d ? _ 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 SirLS-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 1 Dry Pond 23 StormFilter 24 Silva Cell 25 Ba filter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION_ s z 27 Name and Title: J. Michael Stocks, P.E. CEO 28 Organization: Stocks Engineering 29 Street address: 801 E Washington St. 30 City, State, Zip: Nashville, NC 27856 31 Phone numbers : 252-459-8196 32 Email: mstocks@stocksengineering.com ;Certification Statement: 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. 11 %�1 �;11 F;+,I +f''i r ♦� S[Al. �`. r 19843 M Seal h4fi1144% r MW re t ciestigner S 22 Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 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 4 Type of SCM (� 5 Total drainage area (sq ft 859,694 6 Onsite drainage area (sq ft 859,694 1 LD 1 Wet Pond None 604868 604868 254826 254826 7 Offsite drainage area (sq ft 0 0 0 8 Total BUA in project (sq ft 304449 sf_ 243409 sf 61040 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft 185500 sf 141740 sf 43760 sf 10 New BUA not on subdivided lots (subject to 1 permitting)s 118949 sf 101669 sf 17280 sf 11 Offsite BUA(sq ft sf sf sf 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft 4236 sf 4236 sf sf Sidewalk (sq ft 29185 sf 25410 sf 3775 sf - Roof (sq ft sf sf sf - Roadway s ft 85528 sf 72023 sf 13505 sf - Future (sq ft sf sf sf Other, please specify in the comment box below (sq ft sf sf sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf sf sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft sf sf sf 15 Existing BUA that will remain (not subject to 1 permitting)s ft sf sf sf 16 Existing BUA that is already permitted (sq ft sf sf sf 17 Existing BUA that will be removed (sq ft sf sf sf 18 Percent BUA 35% 40% 24% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 25234 cf 21 Calculation method for design volume Simple ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): WETPOND 1 Drainage area number 1 21 Minimum required treatment volume cu ft 25234 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: ? 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 design volume? Yes 91 What is the method for dewatering the SCM for maintenance? Pump (preferred) 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 151 Is there an O&M Plan that complies with General MDC (12)? Yes 16 Does the SCM follow the device specific MDC? Yes 171 Was the SCM desi ned bv an NC licensedprofessional? I Yes WET POND MDC FROM 02H .3053 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 232.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 233.00 221 Elevation of the bottom of the vegetated shelf fmsl) 239.00 23 Elevation of the permanent pool fmsl) 239.00 24 Elevation of the top of the vegetated shelf (fmsl) 240.00 25 Elevation of the temporary pool fmsl 240.63 26 Surface area of the main permanent pool (square feet) 10136 27 Volume of the main permanent pool (cubic feet) 46705 cf 28 Average depth of the main pool (feet) 4.60 ft 29 Average depth euation used Equation 2 30 If using equation 3, main pool perimeter (feet) 31 If using equation 3, width of submerged veg. shelf (feet) 32 Volume of the forebay cubic feet 7667 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 48 in 35 Design volume of SCM (cu ft) 25234 cf 361 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 3 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2 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 431 Depth of forebay at entrance (inches) 60 in 44 Depth of forebay at exit (inches) 36 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 permanentpool? 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 Centipede 54 Hasa lanting plan been rp ovided for the vegetated shelf? Yes ADDITIONAL INFORMATION 55 Wet pond(s)this space to provide any additional information about the 3 't ftfkometer is 2.6' . 4:04 PM 5/13/2022