SW1230601_Supplement-EZ Form_20230623

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
South Parking Area
2
Project Area (ac)
10.97
3
Coastal Wetland Area (ac)
0
4
Surface Water Area (ac)
0
5
Is this project High or Low Density?
.project
High
6
Does this use an off -site SCM?
No
............................................................................................................................................................................................................................................................................................................................................................................................................................................
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided (feet)
N/A
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
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...
1
23
StormFilter
24
Silva Cell...
....
25
Bayfilter ....
26
Filterra
I�IOIIl�lpl�
DESIGNER CERTIFICATION
27
Name and Title:
Dave Skurky, Chief Stormwater Engineer
28
Organization:
Aulick Engineering, LLC
29
Street address:
600 Park Offices Dr.
30
City, State, Zip:
Durham, NC, 27709
31
Phone number(s):
919-819-4242
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--
"'k
Si ature of Designer
�0I
Date

DRAINAGE AREAS
1 Is this a high density project? Yes
......................................................................................................................................................................................................................................................................................
2 If so, number of drainage areas/SCMs 1
3 Does this project have low density areas? No
4 If so, number of low density drainage areas 0
Is all/part of this project subject to previous rul
e
5 versions? No
FOBMSI..OADFD
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
Dry Pond
5
Total drainage area (sq ft)
263053
6
JOnsite drainage area (sq ft)
263053
7
Offsite drainage area (sq ft)
0
8
Total BUA in project (sq ft)
259713 sf
...........................................................................................................................................................................................................................................................................................................................................................
New BUA on subdivided lots (subject to permitting)
9
(sq ft)
New BUA not on subdivided lots (subject to
10
...........................................................................................................................................................................................................................................................................................................................................................
permitting) (so
234302 sf
11
Offsite BUA (sq ft)
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft)
152552 sf
Sidewalk (sq ft)
4043 sf
Roof (sq ft)
Roadway (sq ft)
77707 sf
Future (sq ft) ....
Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
13
subdivided lots (sq ft)
New infiltrating permeable pavement not on
14
subdivided lots (sq ft)
Existing BUA that will remain (not subject to
15
permitting) (sq ft)
25411 sf
16
Existing BUA that is already permitted (sq ft)
17
Existing BUA that will be removed (sq ft)
18
Percent BUA
89%
19
Design storm (inches)
1.0 in
20
Design volume of SCM (cu ft)
17110 cf
21
Calculatiori method for design volume
Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22
drainage area(s):
This
project is within Asheville Regional Airport property, which has a property
of 900ac. For the purposes of our calculations, the limits
of our
construction, 10.97 acres, was used when determining built upon area values.
,,area

DRY POND
1 Drainage area number
1
2 Minimum required treatment volume
17110 cf
GENERAL MDC FROM 02H .1050
3 Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
4 Is the SCM located away from contaminated soils?
Yes
5 What are the side slopes of the SCM (H:V)?
3:1
6 Does the SCM have retaining walls, gabion walls or other engineered
No
side slopes?
Are the inlets, outlets, and receiving stream protected from erosion
7
Yes
(10-year storm)?
8 Is there an overflow or bypass for inflow volume in excess of the
Yes
design volume?
9 What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
10 If applicable, will the SCM be cleaned out after construction?
Yes
11 Does the maintenance access comply with General MDC (8)?
Yes
12 Does the drainage easement comply with General MDC (9)?
Yes
13 If the SCM is on a single family lot, does (will?) the plat comply with
No
General MDC (10)?
14 Is there an O&M Agreement that complies with General MDC (11)?
Yes
...................................................................................................................................................................................................................................................................................................................................................................
15 Is there an O&M Plan that complies with General MDC (12)?
Yes
16 Does the SCM follow the device specific MDC?
Yes
17 Was the SCM desi ned b an NC licensed rofessional .
Yes
DRY POND MDC FROM 02H .1062
18 SHWT elevation (fmsl)
2080
19 Elevation of the bottom of the dry pond (fmsl)
2080.5
20 Distance from bottom to SHWT (feet)
0.5ft
21 Elevation of the temporary pool during the design storm (feet)
2083 ft
22 Ponding depth of the design storm (feet)
3 ft
23 Will the dry pond be uniformly graded to flow toward the outlet?
Yes
24 Is a low flow channel being provided?
No
25 Are the inlet(s) and outlet located in a manner that avoids short-
Yes
circuiting?
26 Will berms or baffles be provided to increase the flow path?
No
27 What method of pretreatment will be provided?
Forebay
28 Design volume of SCM (cu ft)
35,826
29 Diameter of drawdown orifice (in)
3 in
30 Drawdown time for the temporary pool (hours)
40
Does the pond minimize impacts to the receiving channel from the 1-
31
Yes
yr, 24-hr storm?
32 Is there a small permanent pool near the orifice to prevent clogging?
No
33 Will the outlet be designed to prevent clogging?
Yes
34 Are the dam and embankment planted in non -clumping turf grass?
Yes
35 Species of turf that will be used on the dam and embankment
Fescue
36 Will trees and shrubs be prevented from growing on the dam and
Yes
embankment?
ADDITIONAL INFORMATION
Please use tnlS s p ace to p rovioe an Y additional information about the
37
dry pond(s):
There is no permanent pool proposed in the SCM, this is acceptable per Part
E-4 of the Manual.
Dry Pond 3 1:33 PM 6/15/2023