SW1210801_Supplement-EZ Form_20220118

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Pardee Partners Mills River- Road- Low Density
2
Project Area ac
17.411
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0.279
5
Is this project High or Low Density?
Low
6
1 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?
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
12
Bioretention Cell
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16
Sand Filter
17
Rainwater Harvesting (RWH
18
Green Roof
19
Level Spreader -Filter Strip LS-FS
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
Bayfilter
26
Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Jared L. DeRidder, P.E.
28
Organization:
WGLA Engineering, PLLC
29
Street address:
724 5th Avenue West
30
City, State, Zip:
Hendersonville, NC 28739
31
Phone numbers):
828-687-7177
32
1 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.
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DRAINAGE AREAS
1
Is this a hi h 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?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
5
Total drainage area (sq ft
758423
758423
6
Onsite drainage area (sq ft
758423
758423
7
Offsite drainage area (sq ft
8
Total BUA in project (sq ft)
182000 sf
182000 sf
9
_
New BUA on subdivided lots (subject to permitting)
(sq ft
10permitting)
New BUA not on subdivided lots (subject to
s
182000 sf
182000 sf
11
Offsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft
Sidewalk (sq ft
3485 sf
3485 sf
Roof (sq ft
Roadway sc ft)
20473 sf
20473 sf
- Future (sq ft
158042 sf
158042 sf
- Other, please specify in the comment box
below (sq ft
13
New infiltrating permeable pavement on
subdivided lots (sq ft
_
(
l
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
15
Existing BUA that will remain (not subject to
permitting) (soft
16
Existing BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
23.99%
23.99%
19
Design storm inches
20
1 Design volume of SCM cu ft
21
Calculation method for design volume
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):
The proposed private roadway is crowned and will sheet flow off the edge of
the road / sidewalk and sheet flow over the vegetated shoulder.

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)
NIA
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) (%)
N/A I}
8
Bottom width of curb outlet swale(s) (feet)
N/A
9
Maximum side slope of curb outlet swale(s) (H:V)
N/A
10
Minimum length of curb outlet swale(s) (feet)
NIA
11
Are treatment swales used instead of curb outlet swales?
No
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
1 Are variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 1 Please use this space to provide any additional information about this low density project:
Due to the nature of the surrounding area being flat, the runoff from the road will sheet flow over a vegetated shoulder with no
collections stem or swales being proposed.
Swale
#
Drainage
Are
Area
(ac1
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
( % )
VA—V,�,,,,
(fps)
(fps)
Flow depth
(ft)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30