SW3220902_Supplement-EZ Form_20220921

FORMS LOADED
)JE.CT INFORMATION,
1
1 Project Name
Carolina Thomas Midland
2
lProjectArea ac
12.11AC
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
1.50 AC
5
Is this project High or Low Dens4?
Does this project use an off -site SCM?
Low
6
No
VIPLIANCE WITH 02H .1003(4)
7 1 Width of vegetated setbacks provided (feet)
30
8_ 1 Will the vegetated setback remain vegetated?
_
Yes
9 i If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
N/A
0 1 Is stream bank stabilization proposed on thisproject?
No
VIBER AND TYPE OF SCMs:
1
Infiltration System
0
2
Bioretention Cell
0
3
Wet Pond
0
4
Stormwater Wetland
0
5
Permeable Pavement
0
6
Sand Filter
0
7
Rainwater Harvestin RWH
0
8
Green Roof
0
9
Level Spreader -Filter Strip LS-FS
0
0
Disconnected Impervious Surface (DIS)
.0
i
Treatment Swale
0
2
Dry Pond
0
3
Storm Filter
_
0
4
Silva Cell
t)
5 Bayfilter _ _ _
6 Filterra !
0
0
FORMS LOADED
1IGNER CERTIFICATION
7
and Title:
-1
8
.Name
Or anization: _
9
Street address:
0
City,State Zip:
1
Phone numbers :
2
Email:
_ Andrew Christ. PE
FEI Civil Engineers and Land Surveyors
8518 Triad Drive
Colfax, NC 27235
336-544-6438
[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.
P
signsture of Des rgner
Date

Is this a hi h density project?
No
! If so, number of drainage areas/SCMs
0
i 1 Does this project have low density areas?
Yes
I If so, number of low density drainage areas
1
Is all/part of this project subject to previous rule
i versions?
No
FORMSLOADED
AINAGE AREA INFORMATION
Entire Site
LID i
I
Type of SCM
None
None
462,172 SF
i
Total drainage area (sq ft
462.172 SF
i
Onsite drainage area (sq ft
462,172 SF
462.172 SF_
'
Offsite drainage area (sq ft
0 sf
_
0 sf
I
Total BUA in project (sq ft
103617 sf
103617 sf
l
New BUA on subdivided lots (subject to
permitting S ft
0 sf
0 sf
1permitting)
New BUA not on subdivided lots (subject to
s
103617 sf
103617 sf
Offsite BUA sq ft)
Breakdown of new BUA not on subdivided lots:
- Parkin s ft
- Sidewalk (sq ft
- Roofs ft
0 sf
0 sf
80457 sf
80457 sf
1220 sf
1220 sf
21940 sf
0 sf
21940 sf
0 sf
- Roadway s ft
_
- Future (sq ft
0 sf
0 sf
- Other, please specify in the comment box
below (sq ft
I
New infiltrating permeable pavement on
subdivided lots (sq ft
0 sf
0 sf
4
New infiltrating permeable pavement not on
subdivided lots tsq ft
0 sf
0 sf
i
Existing BUA that will remain (not subject to
ermitting) (sq ft
0 sf
0 sf
i.
Existing BUA that is already permitted (sg ft
0 sf
0 sf
'
Existing BUA that will be removed (sq ft
5942 sf
5942 sf
i.
Percent BUA
22%
22%
I
Design storm inches
We
n/a
1
Design volume of SCM cu ft
n/a
n/a
Calculation method for design volume
n/a
n/a
DITIONAL INFORMATIO
JPlease use this space to provide any additional information about the
drainage area(s):

LOW DENSITY
DESIGN R EQUI REMENTS FOR LOW UFNSITY PitOJEM F" OM 02H
1 1Is project below density thresholds set forth in the applicable stormwater rule? Yes
2 Clot project maximize dis rsecl 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 convill (HA0
Maximum velocity in the Vegetated ro_h_v_e_yarrceg dWft the 10-year storm?
Are curb outlet swales proposed? _
Maximum I . itudinal $Iopti of curb outlet swale(a).m
3 to 1
5
5
6
No
7
8
Bottom width of curb outlet swale(s) (feet)
9
Maximum side slope of curb outlet swate(sj (HN)
10
Minimum Jil of curb outlet swale(s) (rEetj
11
Are treatment swales used instead of curb outlet swales?
Yes
Yes
12
is stormwater released at the edhe of the setback as dispersed flow?
13
Have stormwater outlets been designed to prevent daWttslap_e erosion?
Are variations to rule .1003 proposed? _
14
No
ADDITIONAL INFORMATION
15 1 Please use this space to provide additional information about this low density project:
Proposed use requires limited slope along the pavement surface provided for vehicular movement and repair. Site has been
designed to utilize the least amoutn of storm sewer to the maximum extents possible. An existing ditch that drains the road
runoff is being bypased with the use of a culvert Additional offsite drainage from the western adjacent property is bypassed
with the use of a Swale and culvert system in order to grade the site properly the culvert is extended further to provide cover
ovri other utilies such as water and gas lines.
Swale
#
Drainage BUA Pervious
Area
Aarea C
re (ac) ac
Q Slope V.— V,� Flow depth
(cfs) m (fps) (fps) (ft)
1
2
1.65
-
1 0.85 0.80
—
0.85
10.34
1 A0 5.00
3.72 0.68
3
4
5
6
7
8
9
10
11
12
13
14
15
16'
17
16
19
I
20
21
22
23
24
25
26
27 _
26
29
30