SW5211201_Supplement-EZ Form_20220221

SUPPLEMENT-EZ COVER PAGE
1,0FINIS LGti! ! C
PROJECT INFORMATION
1 Project Name Dollar General
2
Project Area ac
2.00
3
Coastal Wetland Area (ac)
4
Surface Water Area (ac)-
5
Is this project High or Low Density?
High
6
1 Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003j4)
7
Width of vegetated setbacks provided (feet) _
Will the vegetated setback remain vegetated?
_ N/A
l N/A J ��
8
9
If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
No
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
0
12
Bioretention Cell
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 Stri LS-FS
0
20
Disconnected Impervious Surface (DISI
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
BIter_ _
0
26 1
Filterra
0
FORMS LOADED
!DESIGNER CERTIFICATION
27
Name and Title:
Matt Lowder, PE
28
Organization:
Bowman North Carolina, Ltd.
29
Street address:
4004 Barrett Drive Suite 101
30
City, State, Zip:
Raleigh, NC 27609
31
Phone number(s):
919-553-6570
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 hi h density project?
Yes
2
If so number of draina a areas/SCMs
1
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
1Entire Site
1
4
Type of SCM
-
Wet Pond
5
Total drainage area (sq ft)
87223 sf
53402
6
Onsite drainage area (sq ft
87223 sf
53402
7
Offsite drainage area (sq ft
8
Total BUA in project (sq ft
38890 sf
38890 sf
9
New BUA on subdivided lots (subject to permitting)
sq ft
10
New BUA not on subdivided lots (subject to
ermittin s
1 Offsite BUA s ft
11
12
f Breakdown of new BUA not on subdivided lots:
- Parkin (s ft
Sidewalk (sq ft
1720 sf
1720 sf
- Roof (sq ft
10640 sf
10640 sf
Roadway (sq ft)
26530 sf
26530 sf
Future (sq ft
Other, please specify in the comment box
below (sq ft
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
45%
73%
19
Design storm inches
1.0 in
20
Design volume of SCM cu ft
3139 cf
21
1 Calculation method for design volume
Simple Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

WET POND
1 Drainage area number
3
2 Minimum re uired treatment volume cu ft
3139 cf
GENERAL MOC FROM 02H AM
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
Are the inlets, outlets, and receiving stream protected from erosion
7 (I0-yearstorm)?
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 COMRIX with General MDC (9)?
Yes
If the SCM is on a single family lot, does (will?) the plat comply with
13 General MDC 10
N/A
14 Is there an O&M Agreement that complies with General MDC (11)?
Yes
15 Is there an O&M Plan that com lies with General MDC 12 ?
Yes
16 Does the SCM follow the devicespecific MDC?
Yes
17 Was the SCM deli ned an NC licensed rofessional?
Yes
18 Slzing 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
removal) (fmsl
252.00
21 Elevation of the main pool bottom (top of sediment removal) (fmsl)
253.00
22 Elevation of the bottom of the vegetated shelf fmsl
258.50
23 Elevation of the permanent pool fmsl)
259.00
24 Elevation of the top of the vegetated shelf fmsl
259.50
25 Elevation of the tempos pool (fmsl)
259.90
26 Surface area of the main permanent pool (square feet)
2205
27 Volume of the main permanent pool cubic feet)
5821 cf
28 Average depth of the main pool feet
3.41 ft
29 Average depth equation used
Equation 3
30 If using equation 3, main pool perimeter (feet)
188.0 ft
31 If using equation 3, width of submerged veg. shelf (feet)
3.0 It
32 Volume of the forebay (cubic feet)
1104 cf
33 Is this 15-20% of the volume in the mainpool?
Yes
34 Clean -out depth for forebay (inches)
24 in
35 Design volume of SCM cu ft
3139 cf
36 Is the outlet an orifice or a weir?
Orifice
37 If orifice, orifice diameter (inches)
1.00 in
38 If weir, weir height (inches)
39 If weir, weir length (inches
40 Drawdown time for the temporary ool (days)
2.02
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 flowpath?
Yes
43 Depth of forebay at entrance (inches)
36 in
44 Depth of forebay at exit (inches)
30 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
r 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
53 Species of turf that will be used on the dam and embankment
Bermuda
54 Hasa planting 21an been provided for the ve etated shelf?
-Hybrid
Yes
ADDITIONAL INFORMATION
55
Please use this space to provide any additional information about
the wet pond(s):
Wet Pond 1 1:47 PM 10/13/2021