SW6200403_1389-Supplemental form_4/30/2020

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
1 Project Name Fayetteville Clinton Road Dollar General
2 Project Area (ac)2.44
3 Coastal Wetland Area (ac)
4 Surface Water Area (ac)
5 Is this project High or Low Density? High
6 Does this project use an off-site SCM? No
7 Width of vegetated setbacks provided (feet) N/A
8 Will the vegetated setback remain vegetated?
9 Is BUA other that as listed in .1003(4)(c-d) out of the setback?
10 Is streambank stabilization proposed on this project?
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 Strip (LS-FS) 0
20 Disconnected Impervious Surface (DIS) 0
21 Treatment Swale 0
22 Dry Pond 0
23 StormFilter 0
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LOADED
27 Name and Title: Scott Brown, PE - Vice President
28 Organization: 4D Site Solutions, Inc.
29 Street address: 409 Chicago Drive, Suite 112
30 City, State, Zip: Fayetteville, NC 28306
31 Phone number(s): 910-426-6777
32 Email:[e-mail]
Certification Statement:

Designer
______________________________________________
Signature of Designer
10-Apr-20
Date

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.
PROJECT INFORMATION
NUMBER AND TYPE OF SCMs:
DESIGNER CERTIFICATION
COMPLIANCE WITH 02H .1003(4)
Seal
DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so, number of drainage areas/SCMs 1
3
Is all/part of this project subject to previous rule
versions? No
FORMS LOADED
Entire Site 1
4Type of SCM Wet pond
5 Total BUA in project (sq ft)37797 sf
6
New BUA on subdivided lots (subject to
permitting) (sq ft)37797 sf
7
New BUA outside of subdivided lots (subject to
permitting) (sf)
8 Offsite - total area (sq ft)
9 Offsite BUA (sq ft)
10 Breakdown of new BUA outside subdivided lots:
- Parking (sq ft)28792 sf
- Sidewalk (sq ft)
- Roof (sq ft)9005 sf
- Roadway (sq ft)
- Future (sq ft)

- Other, please specify in the comment box
below (sq ft)
11
New infiltrating permeable pavement on
subdivided lots (sq ft)
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft)
13
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
14 Existing BUA that is already permitted (sq ft)
15 Existing BUA that will be removed (sq ft)
16 Percent BUA 52%
17 Design storm (inches)1 in
18 Design volume of SCM (cu ft)3146 cf
19 Calculation method for design volume Simple
20
Entire Site 1
4 Type of SCM N/A Wet Pond
5 Total BUA from project (sq ft)37797 sf
6 1995 rules
SL 2006-246
2008 rules
2017 rules
7
New BUA on subdivided lots (subject to
permitting) (sq ft)37797 sf
1995 rules
SL 2006-246
2008 rules
2017 rules
8
New BUA outside of subdivided lots (subject
to permitting) (sf)
1995 rules
SL 2006-246
2008 rules
2017 rules
9 Offsite - total area (sq ft)
1995 rules
SL 2006-246
2008 rules
2017 rules
10 Offsite BUA (sq ft)
1995 rules
SL 2006-246
2008 rules
2017 rules
11 Design storm (inches)1 in
DRAINAGE AREA INFORMATION
DRAINAGE AREA INFORMATION
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
drainage area(s):
1995 rules
SL 2006-246
2008 rules
2017 rules
12 Breakdown of new BUA:
- Parking (sq ft)28792 sf
- Sidewalk (sq ft)
- Roof (sq ft)9005 sf
- Roadway (sq ft)
- 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 outside of
subdivided lots (sq ft)
15
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
16 Existing BUA that is already permitted (sq ft)
17 Existing BUA that will be removed (sq ft)
18 Percent BUA 52%
19 Design volume of SCM (cu ft)3146 cf
20 Calculation method for design volume Simple
21
Please use this space to provide any additional
information about the drainage area(s):
ADDITIONAL INFORMATION
WET POND
1 Drainage area number 1
2 Design volume of SCM (cu ft) 3146 cf
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
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year 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 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
13
If the SCM is on a single family lot, does (will?) the plat comply with
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
18 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) 127.10
21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 128.10
22 Elevation of the bottom of the vegetated shelf (fmsl) 132.60
23 Elevation of the permanent pool (fmsl) 133.10
24 Elevation of the top of the vegetated shelf (fmsl) 133.60
25 Elevation of the temporary pool (fmsl) 133.71
26 Surface area of the main permanent pool (square feet) 4174:1
27 Volume of the main permanent pool (cubic feet) 12372 cf
28 Average depth of the main pool (feet) 3.00 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 veg. shelf (feet)
32 Volume of the forebay (cubic feet) 1995 cf
33 Is this 15-20% of the volume in the main pool? Yes
34 Clean-out depth for forebay (inches) 60 in
35 Design volume of SCM (cu ft) 20924 cf
36 Is the outlet an orifice or a weir? Orifice
37 If orifice, orifice diameter (inches) 1 in
38 If weir, weir height (inches)
39 If weir, weir length (inches)
40 Drawdown time for the temporary pool (days) 3.3
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) 84 in
44 Depth of forebay at exit (inches) 72 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? (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 Has a planting plan been provided for the vegetated shelf? Yes
55
Please use this space to provide any additional information about
the wet pond(s):
WET POND MDC FROM 02H .1053
GENERAL MDC FROM 02H .1050
ADDITIONAL INFORMATION
Wet Pond 1 7:45 AM 4/30/2020