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Home My WebLink AboutSW5200701_Supplement EZ Form 8-28-20_20200828SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name 2 Project Area ac 3 Coastal Wetland Area (ac) Bojangles at Spring Hope 7.87 0 5 Its this project High or Low Density? High 6 1 Does this project use an off -site SCM? No )MPLIANCE WITH 02H .1003(4) 8 Will the vegetated setback remain vegetated? Yes 9 Is BUA other that as listed in .1003(4)(c-d) out of the setback? N/A 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 Rainwater 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 StormFilter 0 24 Silva Cell 0 25 Ba filter 0 26 Filterra 0 FORMS LOADED I (CATION - - Name and Title: J. Michael Stocks, PE 27 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: 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. ,,�IIIIIIIIr11+�, �� •;*IESS/o • • a SEAL • 19843 01'h I YAEL cJ� �••`� Se�1111111�` �(.•Q P%la,4' Sig ature of D signer Date e17- 7/0-0 Zo DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 4 Type of SCM N/A 5 Total BUA in project s ft 149955 sf 6 F7 New BUA on subdivided lots (subject to permitting) s ft sf New BUA outside of subdivided lots (subject to permitting)s 144920 sf 8 Offsite - total area (sq ft sf 9 Offsite BUA (sq ft sf 10 Breakdown of new BUA outside subdivided lots: Parking (sq ft 51962 sf Sidewalk (sq ft 2473 sf - Roof (sq ft 3500 sf - Roadway s ft 21645 sf - Future (sq ft 65340 sf - Other, please specify in the comment box below (sq ft sf 11 New infiltrating permeable pavement on subdivided lots (sq ft sf 12 New infiltrating permeable pavement outside of subdivided lots (sq ft sf 13permitting) Exisitng BUA that will remain (not subject to s ft 5035 sf 14 Existing BUA that is already permitted (sq ft sf 15 Existing BUA that will be removed (sq ft sf 16 Percent BUA 44% 17 Design storm inches 18 Design volume of SCM cu ft 19 Calculation method for design volume ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage area(s): i Wet Pond 149955 sf sf 144920 sf sf sf 51962 sf 2473 sf 3500 sf 21645 sf 65340 sf sf sf 44% 1 in 12602 cf WET POND 1 Drainage area number 1 21 Design volume of SCM (cu ft) GENERAL MDC FROM 02H .1050 31 Is the SCM sized to treat the SW from all surfaces at build -out? 12602 c(:J Fes 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-year storm)? Yes 81 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? 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)? Yes 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 181 Method used Yes 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) 240.00 21 Elevation of the main pool bottom -(top of sediment removal) (fmsi) 241.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 246.00 231 Elevation of the permanent pool (fmsl) 246.50 24 Elevation of the top of the vegetated shelf (fmsi) 247.00 25 Elevation of the temporary pool (fmsl) 248.03 26 Surface area of the main permanent pool (square feet) 5529:1 27 Volume of the main permanent pool (cubic feet) 15356 cf 28 Average depth of the main pool (feet) 3.40 ft 29 Average depth equation used Equation 2 301 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) 3183 of 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 12 in 35 Design volume of SCM (cu ft) 12602 cf 36 Is the outlet an orifice or a weir? Orifice 371 If orifice, orifice diameter (inches) 1 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 4 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) 54 in 44 Depth of forebay at exit (inches) 42 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 permanent pool? Yes 491 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 Centipede 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): Wet Pond 3 11:35 AM 8/24/2020