SW6240502_Supplement-EZ Form_20241105

SUPPLEMENT-EZ COVER PAGE
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PROJECT INFORMATION
1 Project Name DOLLAR GENERAL-DUNN
2 Project Area ac — 2.26
3 Coastal Wetland Area(0) _ 0
4 Surface Water Area ac 0
5 is this project High or tow Density? High
6 Does this project use an off-she SCM? No
COMPLIANCE WITH 02H.100 4
7 Width of vegetated setbacks Rrovided feet 30
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? NIA
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 Infiltration System i - -
12 Bioretention Cell
13 Wet Pond _ 1
14 Stormwater Wetland
15 Permeable Pavement --
18 ISand Filter
17 Rainwater Hervesti ARWH�
18 Green Roof
19 level Spreader-Filter Strip LS-FS _
20 Disconnected Im tvlous Surface DIS
21 Treatment Swale _
22 Dry Pond ---
23 SlormFilter _
24 Silva Cell
25TBa lter26terra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Michael Riemann,Principal
28 Organization: —— Becker Morgan Group
29 Street address: 3333 Jaeckle Drive,Suite 120
30 City,State,Zip: _ --- —- Wilmington,NC 28443
31 Plane num s: 9103417600
32 Email: [e-mail]
Certification Statement:
I certify,under penalty of law that this Suppiement-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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Seat Date

DRAINAGE AREAS
1 Is this a h h densq project? Yes
2 If so,number of drainage areas/SCMs 1
3 Does this ect have low dens areas? s
4 If so,number of low densq drainage areas 1
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Endre She 1 LD 1
4 Type of SCM - Wet Pond Post DA
5 Total drainage area(sq ft 98446 52707 45739
6 Onsite drainage area(sq ft 98446 52707 45739
7 Offsite drainage area ft 0 0
8 Total BUA in project ft 43073 sf 38983 sf 4090 sf
New BUA on subdivided lots(subject to permitting)
9 ft).. sf sf
New BUA not on subdivided tots(subject to
10 permittin 43073 sf 38983 sf 4090 sf
11 Offsite BUA(sq ft sf sf
12 Breakdown of new BUA not on subdivided lots.,
-Parking(sq ft 24872 sf 24872 sf sf
-Sidewalk ft 3471 sf 3471 sf sf
-Roof(sq ft 10640 sf 10640 sf sf
-Roadwa ft 4090 sf sf 4090 sf
-Future(sq ft), sf sf
-Other,please specify in the comment box
below ft sf sf
New infiltrating permeable pavement on
'13 subdivided lots ft sf sf
New infiltrating permeable pavement not on
14 subdivided lots s ftJ_ sf sf
Existing BUA that will remain(not subject to
15permitting) s ft sf sf
16 Existing BUA that is already permitted(sq ft) sf sf
17 Existing BUA that will be removed(sq ft _ of sf
18 Percent BUA 44% 74% 9%
19 Desi n storm inches 1.0 in
20 Design volume of SCM(cu ft) 3128 cf
21 Calculation method for design volume Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

WET POND
1.Drainage area number 1
2'Minimum r wired trealmeM volume�cu h) 3128 cf
GENERAL MDC FROM WHAM
_ 3 is the SCM sinad 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 t 3:1(2:1 below veg.he SCM(H:V)7 shel
6 Does the SCM have retaining watts,gabion walls or other engineered No
side slopes?
Are the inlets,outlets,and receiving stream protected from erosion
7(10year storm Yes
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 erred
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 oomply with General MDC 9? Yee
13 If the SCM is on a single family lot,does(will?)the plat comply With NIA
General MDC 10?
14 Is there an O&M Agreement that complies with General MDC(11)? Yes
15 1 Is tltere an O&M Plan that complies with General MDC 12? Yes
161 Does the SCM follow the device specific MDC? Yes
17 Was the SCM designed by an NC licensed professional? Yes
WET POND MDC FROM 02H.1053
18 Suing method used v SA1DA
19 Has a stage/storage stage/storage table been provided in the calculations? Yes
20 Elevation of the excavated main pool depth(bottom of sediment
removal) fmsl 170.50
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 171.00
22 Elevation of the bottom of the vegetated shelf fmsl 176.25
23 Elevation of the permanent pool(fmsi 176.25
24 1 Elevation of the top of the vegetated shelf fmsl) 177.25
25 Elevation of the pout fmsl 177.60
26 Surface area of the main permanent pool(square feet)_ 3941
27 Volume of the main permanent pool(cubic feet) _ 12622 of
28 Average depth of the main pool(feet) 3.20 ff
29•Average depth equation used Equation 2
30 If using equation 3,main er feet NIA
31 if using equation 3,width of sub shelf feet N/A
32 Volume of the foreba cubic feet) 2273 of
33 Is this 15-20%of the volume in the main pool? _ Yes
34 Clean-Gut depth for forebaylinches) 6 in
51 De n volume of SCMMMM(c fi) 8712 cf
36 Is the outlet an orifice or a weir? Orifice
37 If orifice,orifice diameter(inches) 1.25 in.
38' If weir,weir height(inches)
39 If weir,weir length(inches)
40 Drawdown time for the temporary pod(days) — 3.74
41 Are tte inlet(s)and outlet located in a manner that avoids short- Yes
42 Are berms or baffles provided to improve the flowpath? No
43 Depth of forebay at entrance(inches) 51 in
44 Depth of forebay at exit((inches) 27 in
45 Does water flow out of the foreba in a non-erosive manner? Yes
46 Width of the vegetated shell(test) 6 ft
47 Slope of vegetated shelf H:V 6:1
48 Does the orifice drawdown from below the top surface of the No
_ rmament _?
Does the pond minimize impacts to the receiving channel from the 1-
49 ,24-hr storm? Yes
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 Red
FescuslRyegrass
54 Has a p�anting plan been provided for the vegetated shelf? Yes
ADDITIONAL_INFORMATION
55 Please use this space to provide any additional information about the
wet pond(s):
Permanent pool at 176.25'with tow flow onflce at 176.25'.1.0"storm event has a
peak elevation of 176.51',A 6"x 6"orifice is set al elevation 177-60'and the top of
strucWre as well as the emergency weir are set at 178,50'Top of pond is 179,00'.
Wet Pond 3 4:37 PM 10/30/2024