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Home My WebLink AboutSW3210301_Supplement-EZ Form_20210602SUPPLEMENT-EZ COVER PAGE I ORMS LOADED PROJECT INFORMATION 1 Project Name Cresswind - Phase 2 2 Project Area (ac) 44.1 3 Coastal Wetland Area (ac) 0 4 Surface Water Area (ac) 0.5 5 Is this project High or Low Density? High 6 1 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) 30 8 Will the vegetated setback remain vegetated? Yes I 9 Is BUA other that as listed in .1 003(4)(c-d) out of the setbask? Yes 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 1 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvesting (RWH) 0 18 Green Roof 0 19 Level Spreader -Filter St p (LS-FS) 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 1 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Bayfilter 0 26 Filterra 0 I FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Matthew S. Kiker 28 Organization: Thomas & Hutton 29 Street address: 1020 Euclid Avenue 30 City, State, Zip: Charlotte, NC 28203 31 Phone number(s): 980-201-5507 32 Email: kiker.m@tandh.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 c R o� �Esslo C -S E AT- �'/VGI N F-�� EW S. ZAO �- Signature of Designer -S-Ato-&� Date DRAINAGE AREAS Is this a high density project? Yes 2 If so, number of drainage areas/SCIVIs 1 3 Is all/part of this project subject to previous rule versions? No I CLICK TO LOAD FORM DRAINAGE AREA INFORMATION Entire Site 1 (SUB-01B) 2 (SUB-01C FUTURE) 4 Type of SCM N/A Wet Pond Wet Pond 5 Total BUA in project (sq ft) 1319710 sf 594207 sf 725503 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft) 860000 sf 380000 sf 480000 sf 7 New BLIA outside of subdivided lots (subject to permitting) (sf) 459710 sf 214207 sf 245503 sf 8 Offsite - total area (sq ft) sf sf sf 9 Offsite BUA (sq ft) sf sf sf 10 Breakdown of new BUA outside subdivided lots: Parking (sq ft) sf sf sf Sidewalk �sq ft) 57027 sf 26890 sf 30137 sf Roof (sq ft) sf sf sf I Roadway (sq ft) 402683 sf 187317 sf 215366 sf Future (sq ft) Other, please specify in the comment box below (sq ft) See Column 2 this sheet See Column 2 this sheet sf sf sf sf 11 New infiltrating permeable pavement on subdivided lots (sq ft) sf sf sf 12 New infiltrating permeable pavement outside of subdivided lots (sq ft) sf sf sf 13 Exisitng BUA that will remain (not subject to permitting) (sq ft) sf sf sf 14 Existing BUA that is already permitted (sq ft) sf sf sf 15 Existing BUA that will be removed (sq ft) sf sf sf 16 Percent BUA 67% 11% 0% 17 Design storm (inches) 1 in 1 in 1 in 18 Design volume of SCM (cu ft) 107158 cf 107158 cf 107158 cf 19 Ualculation method for design volume Simple Simple Simple FDDITIONAL INFORMATION 20 �Please use this space to provide any additional information about the drainage area(s): The future area is intended to account for a portion of a future phase to be managed with this Phase 2 pond. L WETPOND ____1]Drainage area number 1 2IDesign volume ofSCM (cu ft) 107158 cf 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 71(10-year Are the inlets, outlets, and receiving stream protected from erosion storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess ofthe design volume? Yes 9 What is the method for clewatering the SCM for maintenance? Drawdown Orifice 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 Ifthe SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? No 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 16 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an INC licensed professional? OND MQC FROM 02H.1053 18 Method used Yes 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) (fimsl) 56050 21 Elevation of the main pool bottom -(top of sediment removal) (fmsi) 56100 22 Elevation of the bottom ofthe vegetated shelf (fimsl) 56450 23 Elevation of the permanent pool (fmsi) 56500 24 Elevation of the top of the vegetated shelf (fimsl) 56550 25 Elevation of the temporary pool (fimsl) 56676 26 Surface area of the main permanent pool (square feet) 38860 27 Volume of the main permanent pool (cubic feet) 132396 cf 28 Average depth of the main pool (feet) 289 ft 29 Average deFth-equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 11600 ft 31 If using equation 3, width of submerged veg- shelf (feet) 30 ft 32 Volume of the forebay (cubic feet) 26361 cf 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) 107158 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 5- in 38 If weir, weir height (inches) 39 If weir, weir length (inches) - 40 Drawdown time for the temporary pool (days) 3 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 offorebay 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? (IfY, please provide documentation that MDC(9) is met-) No 51 Is a trash rack or other device provided to protect the outlet system? Yes 52JAre the dam and embankment planted in non -clumping turf grass? Yes 531Species ofturfthat will be used on the dam and embankment Bermuda b4l Has a planting plan I)een provided for the vegetated shelf.? Yes ADDIMONAL INFORMAMON 551Please use this space to provide any additional information about the wet pond(s):