SW3230901_Supplement-EZ Form_20240409

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Baylor Grove
2 Project Area ac 26.32
3 Coastal Wetland Area ac 0
4 Surface Water Area ac 0
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 30
8 Will the vegetated setback remain vegetated? N/A
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
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 ISand Filter
17 Rainwater Harvesting RWH
18 Green Roof
19 Level Spreader-Filter Strip(IS-FS
20 Disconnected Impervious Surface DIS
21 Treatment Swale
22 Dry Pond
23 Storm Filter
24 Silva Cell
25 Ba filter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Matthew C. Kirchner
28 Organization: Eagle Engineering, Inc
29 Street address: 2013-A Van Buren Ave
30 City,State,Zip: Indian Trail, NC 28079
31 Phone numbers : 704-882-4222
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
\\\��Iillll!/lyy/
�H CARp�
• 2� ,pF� S i�2 �y ;
Q� �< • — Signature of Designer
SEAL =
04550 =
09/2024 04-09-2024
//''illlllleal\\\
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 1
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1
4 Type of SCM Roadside Swale Roadside Swale
5 Total drainage area (sq ft 1,146,329 1,146,329
6 Onsite drainage area (sq ft 1,146,329 1,146,329
7 Offsite drainage area (sq ft 0 0
8 Total BUA in project (sq ft 273562 sf 273562 sf
New BUA on subdivided lots (subject to
9permitting) s ft 233677 sf 233677 sf
New BUA not on subdivided lots (subject to
10permitting) s 37735 sf 37735 sf
11 Offsite BUA (sq ft - -
12 Breakdown of new BUA not on subdivided lots: - -
- Parking (sq ft 350 sf 350 sf
-Sidewalk(sq ft - -
- Roof(sq ft - -
- Roadway s ft 32375 sf 32375 sf
- Future (sq ft - -
-Other, please specify in the comment box
below (sq ft 5010 sf 5010 sf
New infiltrating permeable pavement on
13 subdivided lots (sq ft - -
New infiltrating permeable pavement not on
14 Isubdivided lots (sq ft - -
Existing BUA that will remain (not subject to
15permitting) s ft 2150 sf 2150 sf
16 Existing BUA that is already permitted (sq ft - -
17 Existing BUA that will be removed (sq ft 4000 sf 4000 sf
18 Percent BUA 24% 24%
19 Design storm inches 1.0 in 1.0 in
20 Design volume of SCM cu ft n/a n/a
21 Calculation method for design volume n/a n/a
ADDITION INFORMATION
F22
Please use this space to provide any additional information about the
drainage area(s):
All runoff is conveyed through vegetated roadside ditches. There are no
proposed SCMs on site. The pads &driveways shown are approximate and
final locations are to be determined by the home builder. 'Other' BUA
accounts for portions of proposed driveways inside the right-of-way

LOW DENSITY
r
SIGN RE UIREMENTS 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) 3H:1 V
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 3.50
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 JAre variations to rule .1003 proposed? Yes
ADDITIONAL INFORMATION
15 1 Please use this space to provide any additional information about this low density project:
Vegetated road side swales utilized to route stormwater runoff.
Swale
Drainage BUA Pervious
Q Slope Vailow Vactual Flow depth
# Area (ac) area C (cfs) (%) (fps) (fps) (ft)
ac (ac)
1 1.83 0.44 1.39 0.46 5.08 0.90 4.00 2.23 0.87
2 5.59 1.34 4.25 0.46 15.51 1.00 4.00 3.03 0.98
3 0.83 0.20 0.63 0.46 2.30 1.10 4.00 1.97 0.62
4 0.32 0.08 0.24 0.46 0.89 1.30 4.00 1.66 0.42
5 9.48 2.28 7.20 0.46 26.30 1.00 4.00 3.50 1.42
6 3.71 0.89 2.82 0.46 10.29 1.60 4.00 3.31 0.94
7
8 Note:Swale 5 above include cumulative values of the upstream swales.
9
2