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Home My WebLink AboutSW6210905_Supplement-EZ Form_20220225SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Champion Court Rental 2 Project Area ac 6,72 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? High 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet NIA 8 Will the vegetated setback remain vegetated? WA 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? _ NUMBER AND TYPE OF SCMaf 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 14 Stor nwater Wetland 15 Permeable Pavement.- 16 Sand Filter 17 Rainwater Harves6n RWK 18 Green Roof -- 19 LevelSpreader-Filler StyiLS-FS 2D Disconnected Ire pious Surface DIS 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Samuel R7NM2, PE Principal En Inner 28 O anization: _ Street address: _._ CI State Zt : _ Phone numbs e _ _.- _ _ -- Email: The Site Group, PLLC 29 1111 Oberlin Rd. 30 Raleigh, NC 27607 31 - 919-M-4787 32 sm®thesilegroup.net Q.Qft. alion Slalgtpp0,►; I certify, under penalty of law that this Supplement-EZ form And all supporting informat on were prepared under my direction ar supervision; that the information provided In the form Is, to the best of my knowledge and belief, true, accurate, Ind complete; and that the engineennl plans, apociAcntions, oparotion and maintenance agreements and other supporting information are consistent with the inforrnabon provided here 11\ CAR ?•a� 0 pr•- 3 4981 i ,I I,/, kae of Dnipner Mare 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? 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 Wetpond 5 Total drainage area (sq ft 316899 193759 6 Onsite drainage area (sq ft) 205413 183789 7 Offsite drainage area (sq ft) 111486 9970 8 Total BUA in project (sq ft) 166330 sf 151472 sf 9 New BUA on subdivided lots (subject to permitting) (sq ft) 10 New BUA not on subdivided lots (subject to 1 permitting) (so 149948 sf 145819 sf 11 Offsite BUA (sq ft) 5653 sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft) 89468 sf 85339 sf - Sidewalk (sq ft) - Roof (sq ft) 20160 sf 20160 sf - Roadway (sq ft) - Future (sq ft) 40320 sf 40320 sf - Other, please specify in the comment box below (sq ft) 13 New infiltrating permeable pavement on subdivided lots (sq ft) New infiltrating permeable pavement not on subdivided lots (sq ft) 14 16382 sf 15 Existing BUA that will remain (not subject to permitting) (sq ft) 16 Existing BUA that is already permitted (sq ft) 17 Existing BUA that will be removed (sq ft) 18 Percent BUA 52% 78% 19 Design storm (inches) 1.0 in 1.0 in 20 1 Design volume of SCM cu ft 12147 cf 21 1 Calculation method for design volume INFORMATION Please use this space to provide any additional information about the drainage area(s): SCS Method ADDITIONAL 22 Area for the entire site includes offsite drainage bypassing the wetpond and Drainage Area C. To offset the new BUA that cannot be treated by the pond, 5,653 SF of the existing Buffalo Lake Road is treated. WET POND 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)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? I Yes 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) 259.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 260.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 264.00 23 Elevation of the permanent pool (fmsl) 264.50 24 Elevation of the top of the vegetated shelf (fmsl) 265.00 25 Elevation of the temporary pool (fmsl) 266.00 26 Surface area of the main permanent pool (square feet) 5653 27 Volume of the main permanent pool (cubic feet) 15887 cf 28 Average depth of the main pool (feet) 6.50 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 346.8 ft 31 If using equation 3, width of submerged veg. shelf (feet) 3.0 ft 32 Volume of the forebay (cubic feet) 2778 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 54 in 351 Design volume of SCM (cu ft) 12147 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 2 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2.8 41 Are the inlet(s) and outlet located in a manner that avoids short- arcuitin ? Yes 42 Are berms or baffles provided to improve the flow path? Yes 43 Depth of forebay at entrance (inches) 78 in 44 Depth of forebay at exit (inches) 72 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 Centipede grass 54 Has a P antinq plan been provided for the vegetated shelf? Yes DITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s): Actual Orifice Diameter: 1.5 inches Wet Pond 3 9:31 AM 2/25/2022