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Home My WebLink AboutSW6220201_Supplement-EZ Form_20220510SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 lProiectName Project Area (ac) Coastal Wetland Area (ac) Surface Water Area (ac) Is this project High or Low Density? Does this protect use an off -site SCM? Woodshire Subdivision Phase 8 40.38 0 0.16 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 1 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration S stem 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-FS 20 Disconnected Impervious Surface DIS 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Ba filter IFilterra 26 FORMS LOADED NER CERTIFICATION Name and Title: Organization: Street address: City, State, Zip: Phone number(s): Email: C. Scott Brown, PE 4D Site Solutions, Inc. 409 Chicago Drive - Suite 112 Fayetteville, NC 28306 910-426-6777 sbrown(&4dsitesolutions.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 3 Does this oroiect have low densit areas? No 4 If so number of low 4-ify drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Wet Pond 5 Total drainage area (sq ft 1758953 800,608 6 Onsite drainage area (sq ft 1758953 800,250 7 Offsite drainage area (sq ft 0 358 8 Total BUA in project (sq ft 346247 sf 346247 sf 9permitting) New BUA on subdivided lots (subject to s ft 204000 sf 204000 sf 10 New BUA not on subdivided lots (subject to permitting) (sf) 142247 sf 142247 sf 11 Offsite BUA (sq ft sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft - Sidewalk (sq ft 15353 sf 15353 sf - Roof (sq ft - Roadway s ft 101894 sf 101894 sf - Future (sq ft - Other, please specify in the comment box below (sq ft 25000 sf 25000 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 16 lExistina BUA that is already permitted (sq ft 17 Existing BUA that will be removed (sq ft 18 Percent BUA 20% 43% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 29304 cf 21 Calculation method for design volume ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): Simple The "other' impervious included above is the water surface of the pond WET POND 1 Drainage area number 2 Minimum required treat 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: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-yea r storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the desi n 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 ? Is there an O&M Agreement that complies with General MDC (11)? N/A 14 Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes WET POND MDC FROM 02H .1053 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 260.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 261.00 221 Elevation of the bottom of the vegetated shelf (fmsl) 265.00 23 Elevation of the permanent pool (fmsl) 265.50 24 Elevation of the top of the vegetated shelf (fmsl) 266.00 25 Elevation of the temporary pool (fmsl) 268.94 26 Surface area of the main permanent pool (square feet) 13210 27 Volume of the main permanent pool (cubic feet) 45803 cf 28 Average depth of the main pool (feet) 3.50 ft 29 Average depth equation 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) 7650 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) 68173 cf 361 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 2.8 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2.2 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 43 Depth of forebay at entrance (inches) 71 in 44 Depth of forebay at exit (inches) 66 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 ermanent pooI? 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 Bermuda Grass 54 Hasa plantinq 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): Orrifice is 2.75", this form rounded to 2.8" Wet Pond 3 3:52 PM 4/13/2022