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Home My WebLink AboutSW6220905_Supplement-EZ Form_20220929SUPPLEMENT-EZ COVER PAGE FORMS LOADED .,,,,.,„,enrvxauNmmi2 1 2 Project Name_ Project Area 777 :: 77Hayes 1 Pointe (ac) 3 4 Coastal Wetland Area ac -- -- Surface Water Area (ac) — _ _ 0 5 Is this ectpro High or Low ? Hi___ 6 is Does this project use an off -site SCM? -site _ --' No 6 .7003(4) 7 Width of vegetated setbacks provided (feed 50 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is ro osed in the setback, does it meet NCAC 021-1.1003 N/A 10 Is streambank stabilization proposed on this project? No FORMS WADED 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. � f¢ 'ay�ld}4.yllS 16 U" t�. RM Date DRAINAGE AREAS II 1 Is this a hi h densitYnro'ect? — 1__._. 2 If so number of drainage areaSIS(3% — — _.., _... _ 3 Does this ro'ect have �pw d2ng1� areas? No 4 If so, number:of low density drainage areas Is all/part ofis pct su throjebject to previous ruse__ O�.mm 5 versions? No` 0 FORMS LOADED II .wmmwvrx acm .,�;raG n.*amw-cm+ra�wurmrsxca .rv.wi.viarti a rm:m�.vvr w ,DRAINAGE AREA CNFORMATION Ent --`�-- T e of SCM � ,s, �W�>�r �: � 5 Total drainage area (sq ft) --- —. wet and (1— 636,412 7 Offsite draina a area s ft -` 6 Onsite drainage area s ft __,__. i, e 636 412 (4 ) — 8 Total BUA in project (sg� - New BUA on subdivided lots (subject ) to permitting - 161672 sf II 9 s - New BUA not on subdivided lots (subject to 161672 sf II � 10 ermittin sf � 11 Offsite BUA- 12 Breakdown of new BUA not on subdivided lots: Parkin Sidewalk (so Roof s 1066510665 sf Rdway�q ft) 91620 sf oa Futures ft - 59387 sf II - Other, please specify in the comment box below (sq ft) ry t New infiltrating permeable pavement on 13 subdivided lots (sift --- Ch New infiltrating permeable pavement not on —�— il 14 subdivided lots sq ft) _ II Existing BUA that will remain (not subject to- 15 permittin s ftt� — f 4 16 Existing BUA that is alreadypermitted (sq ft) � � FI`_ II9 17 Existing BUA that will be removed s ft II 18 Percent BUA 25% t 19 Desi n storm (inches) 20 Desi n volume of SCM cu ft -- -- -""— — 1.0 in—p s P. 14775 cf 21 Calculation method for design volume �a simple. II ADDITIONAL INFORMATION ! Please use this :i space to provide any additional information about the 22 drainage area(s): I WET POND r 1 Drainage area number 1 2 1 Minimum required treatment volume cu ft 14775 cf G HERAL MDC FROM 02H .1050 ' 3 I8 the SCM sized to treat the SW from aff surfaces at build -outs �mYes 4 Is the SCM located away from contaminated soils? -- Yes 5 What are the side slopes of the SCM H:V ? 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? Yes 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear 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 clewatering the SCM for maintenance? Pump (preferred) _ 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access coin I 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)? 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)? Y�es� 16 17 Does the SCM follow the device specific MDC? Was the SCM designed by an NC licensedprofessional? Yes Yes WET POND MDC FROM`U2Ci .1053' ., 18 Sizing method used SA/DA_ 19 20 _ Has a stage/storage table been provided in the calculations? Elevation of the excavated main pool depth (bottom of sediment removal fmsl Yes_ _ G 156.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 157.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 161.00 23 Elevation of the ermanent pool (fmsl) _ '161.00 24 Elevation of the top of the vegetated shelf (fmsl) 162.00 25 Elevation of the temporary pool (fmsl) .................— ------ 162.00 26 27 28 Surface area of the main permanent pool (square feet) Volume of the main permanent pool (cubic feet) Average depth of the main pool (feet) 21911 72594 cf 4.00 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 ve .shelf (feet 32 Volume of the forebay (cubic feet)14625 cf_ 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) 24010 cf 1 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 inlets) and outlet located in a manner that avoids short- — circuitfn ?cam _ Yes 42 Are berms or baffles provided to im rove the flowpath? No 43 De th of foreba at entrance inches 44 Depth of forebay at exit (inches) 42 in 45 46 Does water flow out of the forebay in a non -erosive manner? Width of the vegetated shelf (feet) Yes g p 47 Slope of vegetated shelf (H:V) 48 Does the orifice drawdown from below the top surface of the ermaneool? nt 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 51 MDC 9 is met.L Is a trash rack or other device provided to protect the outlet system? No 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 54 Has a plantin Ian been rovided for the ve etated shelf? Yes A1JD_ ITIONAL INFORMATION �° _. 55 Please use this space to provide any additional information about the wet pond(s) i Wet Pond 1 2:16 PM 7/14/2022