SW6221007_Supplement-EZ Form_20230627 (2)

WET POND
,1 Drainage area number 1
2 Minimum required treatment volume Icu ft) 33184 cf
GENERAL MDC FROM 02H.1050--..._-----
1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes__
4I Is the SCM located away from contaminated soils? — Yes
5hat are the side slopes of the SCM(H V)? 3:1
I W
6l Does the SCM have retaining walls,gabion walls or other engineered Yes
side slopes?
Are the inlets,outlets,and receiving stream protected from erosion Yes
7(10-year stormj?
8 Is there an overflow or bypass for inflow volume in excess of the Yes
design volume?
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
If the SCM is on a single family lot,does(will?)the plat comply with N/A
13 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 MDC(12)? Yes
16 Does the SCM follow the device specific MDC? Yes_
17 Was the SCM designed by an NC licensed professional? Yes
WE'i MDC FROM 02H.1053 -
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 380.00
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 381.00
22 Elevation of the bottom of the vegetated shelf(fmsl) 385.00
23 Elevation of the permanent pool(fmsl) _ 385.00
24 Elevation of the top of the vegetated shelf(fmsl) 386.00
25 Elevation of the temporary pool(fmsl) 386.00
26:Surface area of the main permanent pool(square feet) 28921
27 Volume of f the main permanent pool(cubic feet) —99734 cf
28 Average depth of the main pool(feet) 3.45 ft _
29 Average depth equation used Equation 2_
30 If using equation 3,main pool perimeter(feet)
r 31 If using equation 3,width of submerged veg.shelf(feet)
32'Volume of the forebay(cubic feet) 19669 cf
33 Is this 15-20%of the volume in the main pool? Yes
34 Clean-out depth for forebay(inches) 47 in
35 Design volume of SCM(Cu ft 37360 cf
36[Is the outlet an orifice or a weir? Orifice
37 If orifice,orifice diameter(inches) 3 in
38 If weir,weir height(inches)
r 39 If weir,weir length(inches)
40 Drawdown time for the temporary pool(days) 2.93
41 Are the inlet(s)and outlet located in a manner that avoids short- Yes
circuiting? _
42 Are berms or baffles provided to improve the flow path? Yes
43 Depth of forebay at entrance(inches) 71 in
44 Depth of forebay at exit(inches) 59 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 Yes
permanent pool?
Does the pond minimize impacts to the receiving channel from the 1-
49 Yes
yr;24-hr storm? —
50 Are fountains proposed?(If Y,please provide documentation that No
MDC(9)is met.)
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
54,Has a plantinglan beenrovided for the vegetated shelf? Yes
ADDITIONAL INFORMATION `s
55 Please use this space to provide any additional information about the'
wet pond(s)-
Wet Pond 1 9:56 AM 5/1/2023