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Home My WebLink AboutSW6190901_Supplement-EZ Form_20200226SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Project Area ac Coastal Wetland Area ac Hoke Landing Phase 2 2 14.57 3 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 23 8 lWill the vegetated setback remain vegetated? Yes 9 Its BUA other that as listed in .1003 4 c-d out of the setback? Yes 10 lis streambank stabilization proposed on this project? Yes NUMBER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 1 14 Stormwater Wetland Permeable Pavement 0 15 0 16 ISand Filter 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-F5 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell D 25 Bayfilter 0 26 Fiiterra 0 FORMS LOADED CERTIFICATION 27 1 Name and Title: 28 O anization: 29 IStreet address: 31 Phone 32 Email: PE Larry King & Assoc., RLS, PA 13_33 Morganton Road, Suite 20, Fayetteville, NC 28305 — 910-483-4300 T jnobies@lkanda.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 `a,6atCAyo errerrrp Q 9� SEAL = - 31459 F°yC'I N E.�'�`�1��:� 9X-LL Sigt f D sig r 10- Date 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 IType of SCM Total BUA in project (sq ft New BUA on subdivided lots (subject to permitting) (sq ft New BUA outside of subdivided lots (subject to s Entire Site 1 4 Wet Detention Wet Detention 5 503760 sf 228200 sf 6 115586 sf 1 D8538 sf 7permitting) 101266 sf 64127 sf 8 Offsite - total area ft 9 Offsite BUA (sq ft 10 Breakdown of new BUA outside subdivided lots: Parki sq ft 72524 sf 61740 sf Sidewalk ft 3028 sf 2387 sf Roof ft 25714 sf Roadway s it) - Future (sq ft - Other, please specify in the comment box below (sq ft 11 New infiltrating permeable pavement on subdivided lots ft sf sf sf 12 New infiltrating permeable pavement outside of subdivided lots sq ft sf 286908 sf sf 13 Exisitng BUA that will remain (not subject to ermitting) (sq ft 55535 sf 14 Existing BUA that is already permitted ft sf sf 15 1 Existing BUA that will be removed (sq ft sf 16 Percent BUA 79% 78% 17 Desi n storm inches 1 in 1 in 18 Desl n volume of 5CM cu ft 18926 cf 19 Calculation method for design volume Simple Medthod Simple Method ADDITIONAL INFORMATION A. 20 Please use this space to provide any additional information about the drainage area(s): "Entire Site" includes all areas within the existing development, the current proposed development and any future outparcel development. Column 11 represent the areas actually draining to the proposed wet detention area"Subdivided Lots" are taken to mean outparcels for future or current 1 Drainage area number 2 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? 1 18327 cf Fes Yes 3:1 4 Is the SCM located away from contaminated soils? 5 What are the side slopes of the SCM (H:V)? 6 Does the SCM have retaining walls, gabion wails 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)? 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 MOC (12)? Yes 16 Does the SCM fo ow the device specific MDC? Yes 17 Was the SCM designed by an NC licensed professional? ND MQC FROM 02H.1053 18 Method used Yes s SA/DA 19 Has a stagelstorage table been provided in the calculations? yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl) 236.00 21 Elevation of the main pool bottom -(top of sediment removal) (fmsl) 237.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 243.60 23 Elevation of the permanent pool (fmsl) 244.00 24 Elevation of the top of the vegetated shelf (fmsl) 244.50 25 Elevation of the temporary pool (fmsl) 245.50 26 Surface area of the main permanent pool (square feet) 8169:1 27 Volume of the main permanent pool (cubic feet) 33845 cf 28 Average depth of the main pool (feet) 4.14 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) 6487 of 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) 18327 cf 36 Is the outlet an orifice or a weir? Orifice 371 If orifice, orifice diameter (inches) 2 in 381 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 3.5 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) 60 in 44 Depth of forebay at exit (inches) 54 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 49 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 631 Species of turf that will be used on the dam and embankment Centipede 54 Hasa planting plan been provided for the vegetat shel . Yes ADDITIONAL INFORMATION Please use this space to provide any additional information about the 55 wet pond(s): Wet Pond 1 1•rtA am -)17 FYln)A