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Home My WebLink AboutSWA000179_Supplement-EZ Form_20230103SUPPLEMENT-EZ COVER PAGE ORMS LOADI PROJECT INFORMATION 1 Project Name Youngsville Academy 2 Project Area ac 13.55 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? High 6 Does this protect use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 6' 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 113ayfilter IFilterra 25 26 FORMS LOADED DESIGNER CERTIFICATION 27 IName and Title: Street address: City, State, Zip: Phone number( Email: Jim Roth, PE Cole & Associates 2701 E Camelback Rd Phoenix, AZ 85016 602-795-4111 Ext 1401 iroth(a)colestl.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- 1 `.`�� •C A R0��'% • SEAL 038197 ,''9� 1111111►�0 ``\` 12/05/2022 Seal Signature of Designer Date 12/5/2022 DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this roject 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 Site 1 4 Type of SCM Wet Pond 5 Total drainage area (sq ft 798890 638,590 6 Onsite drainage area (sq ft 798890 738,590 7 Offsite drainage area (sq ft 0 0 8 Total BUA in project (sq ft) 190287 sf 190287 sf 9 New BUA on subdivided lots (subject to ermitting) (sq ft sf 10permitting) New BUA not on subdivided lots (subject to s 190287 sf 190287 sf 11 Offsite BUA (sq ft sf 12 Breakdown of new BUA not on subdivided lots: 194713.2 194713.2 - Parking (sq ft 36700 sf 36700 sf - Sidewalk (sq ft 10500 sf 10500 sf - Roof (sq ft 25000 sf 25000 sf - Roadway s ft 118087 sf 118087 sf - Future (sq ft sf - Other, please specify in the comment box below (sq ft) sf 13 New infiltrating permeable pavement on Isubdivided lots (sq ft sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft) sf 15permitting) Existing BUA that will remain (not subject to s ft sf 16 Existing BUA that is already permitted (sq ft sf 17 Existing BUA that will be removed (sq ft sf 18 IlPercent BUA 24% 24% 19 IDesign storm inches 2.9 in 2.9 in 20 IDesign volume of SCM cu ft 27302 cf 27302 cf 21 lCalculation method for design volume SCS SCS ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): � J WET POND Drainage area number ERAL 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-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? 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 15 Is there an O&M Plan that complies with General MDC (12)? 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 HRT 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 419.50 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 420.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 424.90 23 Elevation of the permanent pool (fmsl) 424.90 24 Elevation of the top of the vegetated shelf (fmsl) 426.00 25 Elevation of the temporary pool (fmsl) 427.94 26 Surface area of the main permanent pool (square feet) 11977 27 Volume of the main permanent pool (cubic feet) 41736 cf 28 Average depth ofthe main pool (feet) 3.48' 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) 8354 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 29 in 35 Design volume of SCM (cu ft) 22751 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 3 in 38 If weir, weir height (inches) 39 Ifweir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2.65 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) 41 in 44 Depth of forebay at exit (inches) 35 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? No 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 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 3 5:39 PM 12/6/2022