SWA000202_EZ_06292023

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 1 Project Name Virginia Foil Park
2 Project Area(ac) 24.02
3 1 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)
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)? Yes
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond 2
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting(RWH) �v
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
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Matt Blackmon, Project Manager
28 Organization: Benesch
29 Street address: 2359 Perimeter Pointe Parkway,Suite 350
30 City,State,Zip: Charlotte,NC 28208
31 Phone number(s): 704-831-5686
32 Email: [e-mail]
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.
Designer
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DRAINAGE AREAS
1 Is this a high density project? Yes j
2 If so,number of drainage areas/SCMs 2
3 Does this project have low density areas? No
4 If so,number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? No
CLICK TO LOAD FORM

WETPOND
11 Drainage area number BMP-1 BMP-2
2 Minimum re wired treatment volume cu ft
GENERAL MDCTROM 02H.1050
751 71sthe
SCM71ocat7edaway
at the SW from all surfaces at build-out? Yes Yes
SCM from contaminated soils? Yes Yes
What are the side slopes of the SCM(H:V)? 3:1 3:1
6 Does the SCM have retaining walls,gabion walls or other engineered Yes No
side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes Yes
(10-year storm)?
81Is there an overflow or bypass for inflow volume in excess of the Yes Yes
design volume?
9 What is the method for dewatering the SCM for maintenance? Other Other
10 If applicable,will the SCM be cleaned out after construction? Yes Yes
11 Does the maintenance access comply with General MDC(8)? Yes Yes
12 Does the drainage easement comply with General MDC(9)? Yes Yes
If the SCM is on a single family lot,does(will?)the plat comply with
13 General MDC(10)? N/A N/A
14 Is there an O&M Agreement that complies with General MDC(11)? Yes Yes
15;Is there an O&M Plan that complies with General MDC(12)? Yes Yes
16j Does the SC follow the device specific MDC? Yes Yes
171 Was the SCM designed by an NC licensed rofessional? Yes Yes
WET POND MDC FROM 02H.1053
181 Sizing method used SA/DA SA/DA
191 Has a stage/storage table been provided in the calculations? Yes Yes
20�Elevation of the excavated main pool depth(bottom of sediment 607.00 586.00
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 608.00 587.00
22 Elevation of the bottom of the vegetated shelf(fmsl) 611.00 591.00
231 Elevation of the permanent pool(fmsl) 1 611.50 591.50
24 Elevation of the top of the vegetated shelf(fmsl) 612.00 592.00
25 Elevation of the temporary pool(fmsl) ( 613.16 593.50
26 Surface area of the.main permanent pool(square.feet) q,590 sf 14,729 sf
27 Volume of the main permanent pool(cubic feet) 12419 cf 19960 cf
28 Average depth of the main pool(feet) 3.60 ft 4.67 ft
29 Average depth equation used Equation 3 Equation 3
301 If using equation 3,main pool perimeter(feet) 5237.0 ft 8661.0 ft
31 i If using equation 3,width of submerged veg.shelf(feet)
32,Volume of the forebay(cubic feet) 2243 cf 19960 cf
33,Is this 15-20%of the volume in the main pool? Yes Yes
341 Clean-out depth for forebay(inches) 12 in 12 in
351 Design volume of SCM(cu ft) 9427 cf 24850 cf
361 Is the outlet an orifice or a weir? Orifice Orifice
37 If orifice,orifice diameter(inches) 2 in 2 in
38 If weir,weir height(inches)
39 If weir,weir length(inches)
40 Drawdown time for the temporary pool(days) 2.5 3
41 Are the inlet(s)and outlet located in a manner that avoids short- Yes Yes
circuiting?
42 Are berms or baffles provided to improve the flow path? Yes Yes
43 Depth of forebay at entrance(inches) 36 in 48 in
44 Depth of forebay at exit(inches) 36 in 48 in
45 Does water flow out of the forebay in a non-erosive manner? Yes Yes
46 Width of the vegetated shelf(feet) 6 ft 6 ft
471 Slope of vegetated shelf(H:V) 6:1 6:1
48�Does the orifice drawdown from below the top surface of the Yes Yes
permanent pool?
49 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes
yr,24-hr storm?
50 Are fountains proposed?(If Y,please provide documentation that No No
MDC(9)is met.)
51 Is a trash rack or other device provided to protect the outlet system? Yes Yes
52 Are the dam and embankment planted in non-clumping turf grass? Yes Yes
531 Species of turf that will be used on the dam and embankment SOD SOD
541 Has a lantin Ian been orovided for the ve ietated shelf? Yes Yes
ADDITIONAL I NFORMATION
55 Please use this space to provide any additional information about the
wet pond(s):
The spreadsheet rounded the SCM-1 Orifice of 1.5 to 2.1.5 Is called out on the SCM-
1 Plans,See Sheet C310 of Plan Set.
Wet Pond 3 1:29 PM 3/28/2023