SW5240602_Supplement-EZ Form_20241007

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 'Project Name Red Bud Solar
2 Project Area(ac) 431
3 Coastal Wetland Area(ac) n/a
4 Surface Water Area(ac) 1.2
5 Is this project High or Low Density? Low
6 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) _ 50 ft
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)? _ N/A
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 !Infiltration System 0
12 Bioretention Cell 0
13 Wet Pond 0
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
DESIGNER CERTIFICATION
27 'Name and Title: Ryan Brick,P.E.
28 Organization: NEI Electric Power Engineering,Inc.
29 Street address: 12600 W.Colfax Ave,Suite C500
30 City,State,Zip: Lakewood,CO 80215
31 Phone number(s): 303-431-7895
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 `► ►►I I I l i ,,
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y Date:2024.10.03
SEAL _ 22:53:44-06'00'•
• Signature of Designer
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Seal Date

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 3
Is all/part of this project subject to previous rule
5 versions? No
I FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1 LD 2 LD 3
4 Type of SCM N/A DA 1 DA 2 DA 3
5 Total drainage area(so ft) 18829081 8184920 64817 10579344
6 Onsite drainage area(sq ft) 18829081 8184920 64817 10579344
7 Offsite drainage area(sq ft) 0 0 0 0 sf
8 Total BUA in project(so ft) 405908 sf 154273 sf sf 251635 sf
New BUA on subdivided lots(subject to permitting)
9 (sa ft) N/A N/A N/A N/A
New BUA not on subdivided lots(subject to
N!!N#permitting)(sf) 405908 sf 154273 sf N/A 251635 sf
####Offsite BUA(so ft) N/A N/A N/A N/A
##k#Breakdown of new BUA not on subdivided lots:
-Parking(so ft) N/A N/A N/A N/A
-Sidewalk(so ft) N/A N/A N/A N/A
-Roof(so ft) N/A N/A N/A N/A
-Roadway(sq ft) 321679 sf 149953 sf N/A 171726 sf
-Future(so ft) N/A N/A N/A N/A
-Other,please specify in the comment box
below(sq ft) N/A 4320 sf N/A 79909 sf
New infiltrating permeable pavement on
####subdivided lots(sq ft) N/A N/A N/A N/A
New infiltrating permeable pavement not on
#444 subdivided lots(sq ft) N/A N/A N/A N/A
Existing BUA that will remain(not subject to
#####permitting)(sq ft) N/A N/A N/A N/A
####Existing BUA that is already permitted(sq ft) N/A N/A N/A N/A
####Existing BUA that will be removed(sq f) N/A N/A N/A N/A
####Percent BUA 2% 2% 0% 2%
####Design storm(inches) 6.2 in 6.2 in 6.2 in 6.2 in
####Design volume of SCM(cu ft) N/A N/A N/A N/A
####Calculation method for design volume N/A N/A N/A N/A
ADDITIONAL INFORMATION _
Please use this space to provide any additional information about the
#####drainage area(s):
LD 1 drains to Tumbling Run and LD 2 drains to Jumping Run.LD 3 drains to
Pig Basket Creek which is not part of the HWQ zone.
The gravel access roads are included as roadway while the O&M building and
gravel pads for the substation and inverters are counted as"Other".

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H.1003
1 Is project below density thresholds set forth in the applicable stormwater rule? Yes
2 Does project maximize dispersed flow and minimize channelization of flow? Yes
3 Has the use of piping been minimized per.1003(2)(c)? Yes
4 Side slopes of the vegetated conveyances(H:V) 3 to 1
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 2
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? Yes
14 Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
All ditches on site that drain to High Quality Waters for erosion control are temporary and will not be retained after construction.
Only one roadside ditch is to remain within the HOW area.
Drainage Pervious
Swale Area BUA area C Q Slope Vanaw V,ct„ei Flow depth
# (ad (ac) (ad (cfs) (%) (fps) (fps) (ft)
1 0.24 0.07 0.17 0.53 0.68 6.50 2.00 1.82 0.40
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