SW5220101_Supplement-EZ Form_20220408

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name
2 Project Area (ate
3 Coastal Wetland Area (ac)
4 Surface Water Area (ac)
5 Is this project High or Low Density?_
6 Does this project use an off -site SCM?
Hardee's - Main Street
No
COMPLIANCE WITH 02H .1003(4)
7 _
Width of vegetated setbacks provided (feed_ _
_ _ _ N/A
8
Will the vegetated setback remain vegetated? _
N/A
9
If BUA is proposed in the setback, does it meet NCAC 021­1.1003(4)( -q)?
_ _ _ N/A
No
10
Is streambank stabilization proposed on this project?
NUMBER AND TYPE OF SCMs:
11 Infiltration System
~12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland 1
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting (RWH)
18 Green Roof
19 Level Spreader -Filter Strip L( S-FS)
20 _Disconnected Impervious Surface (DIS)
_21 Treatment Swale
22 Dry Pond
23 Storm Filter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title: _
Ray Watson, PE
28
O_rganization:
McAdams
25
Street address: _ _
2905 Meridian Parkway
30
gLty, State, Zip: _ _ — —
Durham, NC, 27713 _
31
Phone number(§):
Email_
9193615000
[e-mail]
32
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.
NO! • „ C14
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Date

DRAINAGE AREAS
1
Is this a high deiect?
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
Is all/part of this project subject to previous rule
5
versions?
No
FORMS LOADED
AREA INFORMATION
re Site 1 1
4
Type of SCM
N/A
76.793
76,793
5
6
Total drainage area (sq ft
90115.00
Onsite drainage area (sq ft
90115.00
7 Offsite drainR9e area (sq ft)
8 Total BUA in project (sq ft)
New BUA on subdivided lots (subject to permitting)
9 (sq ft)
New BUA not on subdivided lots (subject to
10 oermitting) (sf)
11 Offsite BUA (sq ft)
12 Breakdown of new BUA not on subdivided lots:
~ Parking (sq ft
_ 0 _
61956_ sf
61956 sf
0
61956 sf
61956 sf
32323 sf
32323 sf
Sidewalk (sq ft)
2755 sf
2755 sf
13
14
Roof (sq ft)
Roadway (sq ft)
Future (sq ft) _
Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
subdivided lots (sq ft)
New infiltrating permeable pavement not on
subdivided lots (sq ft)
Existing BUA that will remain (not subject to
permitting) (sq ft)
Existing BUA that is already permitted (sq ft)
Existing BUA that will be removed (sq ft)
Percent BUA
Design storm inches)
esign volume of SCM (cu fD
Valculation method for design volume
3099 sf
3099 sf
23779 sf
23779 sf
15
16_
17
18
69%
81%
19
20
21
1.0 in
1,0 in
5831 cf
5831 cf
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
1 = Subbasin 1 to SCM A

STORMWATER WETLAND
1 !Drainage area number 1
_
iMinimum r PtT treatment vp)ums (cu (0 _ 8sl of
SEVERAL MOC FROM 02H .3050
3
Is the SCM Rued Ito treat the SW from all &Irfaces at build -out? Yes
Is the SCM located away from contaminated soils? _ Yes
W hat are the side slopes of the SCM (H:V)? 3.1
4
5
6
Does the SCM have retaining walls, gabion walls or other engineered No
_
side slopes?
7
Are the inlets, outlets, and receiving stream protected from erosion (10 Yes
year storm?
Is there an overflow or bypass for inflow volume in excess of the Yes
6
design volume?
What is the method for dewatering the SCM for maintenance? Drawdown Orifice
9
10
If applicable, will the SCM be cleaned out after construction? Ye
11
Does the maintenance access comply with General MDC (8)? Yes
12.
Does the drainage easement comply with General MDC (99)? Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
N/A
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 desfgyned by an NC dcerised_professional7 Yesi
113 Design volume of SCIV (w R)
5831
19 Are the inlet(s) and outlet located in a manner that avoids short-
Yes
cftui6ng? f.
20 Are berms or baffles Eroyid0d to Improve the flow paflli
No
21 Does the orifice drawdown from below the top surface of the
Yes
ermanent.pool?
22 Does the wetland minimize impacts to the receiving channel from the 1
Yes
yr, 24-hr storm? _
23 Is a trash rack or other device provided to protect the outlet system?
Yes
24
Elevation, peak attenuation above temporary pool (if applicable) (fmsl)
273.57
25
Elevation, temporary pool (lop of the temporary inundation zone) (fmsl)
273.25
26
Elevation, permanent pool (top of the shallow water zone) (fmsl)
272.00
271
Elevation, bottom of shallow water zone (fmslj
271 _50
28 Elevation, bottom of forebay deep pool at deepest point (at forebay
268.90
entrance) (fmsl)
29 Elevation, bottom of forebay deep pool at shallowest point (at forebay
269.00
exit) (fmsi)
30 Elevation, bottom of non-forebay deep pool at deepest point (fmsl)
269.00
Planting Zones
31 • Area, total surface area of the SW wetland at temporary pool elev. (sq
5,740,00
(I) _
32 Area, temporary inundation zone at temporary pool elev (sq fl) _
2.311.00
33 Area, shallow water zone at temporary pool elev. (sq 1
2,507.00
34 Area, forebay at temporary pool elev. (sq R)
631.00
35•Area, non-forebay deep pool at temporarypool elev Ssgft)
_
291 00
36 Percent area provided, temporary inundation zone (should be 30-45%)
40 %
37 Percent area provided, shallow water zone (should be 35-45%)
44 % _
T
38 Percent area provided. deep pool (lorebay) (should be 10-15%)
11 %
39 Percent area provided, deep pool (non-forebay) (should be 5-15%) J
5 %
Depths and Outlet
40
Peak attenuation depth above temporary inundation zone (inches)
4 in
41
Temporary inundation zone depth (temporary pool to permanent pool)
15 in
42
Shallow water zone depth (permanent pool to bottom of wetland)
6 in
(inches)
43
Depth, forebay at entrance (permanent pool to bottom of forebay
37 in
entrance) (inches)
44
Depth, forebay at exit (permanent pool to bottom of forebay exit)
36 in
nches)
45
Depth, non-forebay deep pools (permanent pool to deep pool bottom)
36 in
(inches)
46
If there is an orifice. diameter (inches)
1 in
47
If there is a weir, weir height (inches)
48
It there is a wek,.weir length (inches)
12 in
49
Drawdown time for the temporary_pool (days)_
Wetland 9:19 AM 4/8/2022

STORMWATER WETLAND
Sod and Plants
50 Soil amendment depth (inches)
51 Has a soil amendment specification been provided? Yes
52 Has a landscaping plan that meets SW Wetland MDC (12) been Yes
provided?
53 Number of plants per 200 square feet (#) in the shallow water zone:
54 Does the temporary inundation zone planting comply with SW Wetland Yes
MDC (14)?
55 Are the dam structure and temporary fill slopes planted in non- Yes
clumping turfgrass?
SW W41 cattalls be Wanted In the weHand7 No
57Please use this space to prowda any addilional Information about the
stormwater wetland(s):
24) Peak Attenuation for the 1 yr, 24-hr storm
42) Shallow Water zone depth = average/design depth for this zone = 6"
47) 0.25 in weir height
53) 50 plants per 200 square feel
Wetland 4 9:19 AM 4/8/2022