SW5211202_Supplement-EZ Form_20220203

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PR'OdEC'C
(f (FORMATION
1
Pro Name —_
�..�_ _. _ Nnh 07
2
_._
Project Area�ac�_^ _
_� 23.3
3
Coastal wetland Area
4
Surface Water Area (ac) _—
_ 0
�5
6
Is this High or Low Density? F_— _ w_. _
Does this project use an off -Site SCM?
Lam`'
No
)MPLIANGE WITH 82N A003(4)
7 Wktth of d_!It_baCksyrovldad�feet� _ _»
8 Will the vegetated setback remain veld? _ Yes
9 If BUA Is proposed in the setback does it meet NCAC 02H.1003(4} )? _w NIA __ µ
10 Is streambank stabilization proposed on this project? _ No
NUMBER AND TYPE OF SCMs�^
11
Infiltration stem ____
12
Bioretention Call
13
_
_Wet Pond___ .._._..._..__v..__.�..._—..
�._.......—__....._____._..-.._ --..._.�___-._�„
14
3tormwaterWetland�—__.__
- 15
Permeable Pavement
_.._
16
�_. _.
Sand Filter
17
Rainwater Harvesting (RWH)_Ay.^ —�
_ _.._._...------
18
G_reen Roof
19
Level Spreader -Filter Strip (LS-FS)�M_T
20
Disconnected Impervious Surface DIS
1—
Treatment Swale
_21
23
24
StonnFilter
Silva Cell
26
Flltarra
FORMS L A E
7
Name and Title:
f Mario T. Cartoon, Civil Enpineering Manager
8 _
Or9anizafion. _ _ _ _ _ . _
l dress Creek Renewabtes LLC
I _
[29
Street address
6310S. Noton Ave Bldg 3000
Cit�r, SDurham,
NC 27713
1
Phone number ap
(816) 905 15402
marlo.carraon®ccrenew.com
Emeil:
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 beat of my knowledge and befief, 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.
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Signature of Designer
Date
r

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Does this project have low density areas?
Yes
4
If so, number of low density drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
I No
FORMS LOADED
DRAINAGE
AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
DIS
DIS
5
Total drainage area (sq ft)
1014948
6
Onsite drainage area (sq ft)
1014948
7
Offsite drainage area (sq ft)
0
8
Total BUA in project (sq ft)
47514 sf
9
New BUA on subdivided lots (subject to
permitting) (sq ft)
10
New BUA not on subdivided lots (subject to
permitting) (so
Offsite BUA (sq ft)
11
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft)
- Sidewalk (sq ft)
- Roof (sq ft)
- Roadway (sq ft)
- Future (sq ft)
- Other, please specify in the comment box
below (sq ft)
44297 sf
3217 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft)
14
New infiltrating permeable pavement not on
subdivided lots (sq ft)
15
Existing 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
4.68%
19
Design storm (inches)
N/A
20
Design volume of SCM (cu ft)
N/A
21
Calculation method for design volume
N/A
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):
Inverter pads and steel piles supporting the fixed tilt solar panel system.

LOW DENSITY
UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
oject below density thresholds set forth in the applicable stormwater rule?
Yes
r
s project maximize dispersed flow and minimize channelization of flow?
Yes
the use of piping been minimized per.1003(2)(c)?
Yes
slopes of the vegetated conveyances (H:V)
N/A
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
6
Are curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (%)
8
Bottom width of curb outlet swale(s) (feet)
9
Maximum side slope of curb outlet swale(s) (H:V)
10
Minimum length of curb outlet swale(s) (feet)
11
Are treatment swales used instead of curb outlet swales?
12
Is stormwater released at the edge of the setback as dispersed flow?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Are variations to rule .1003 proposed?
No
14
No
ADDITIONAL
15
INFORMATION
1 Please use this space to provide any additional information about this low density project:
Solar farm construction was completed in 2015 and all project disturbed areas are vegetated. There are no permanent SCMs for
the project - all flow is considered dispersed sheet flow.
Swale
Drainage
BUA
Pervious
Q
Slope
Vallow
Vactual
Flow depth
#
Are
(ac)
area
C
(cfs)
(%)
(fps)
(fps)
(ft)
(ac1
23.30
1.10
22.20
0.40
2
3
4
5