SWA000197_Supplement-EZ Form_20230424

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name
2 Project Area ac
3 Coastal Wetland Area ac
Oakmont Subdivision Phase III
114.51
0
13.26
4
Surface Water Area ac
5
Is this project High or Low Density?
High
6
Does this protect use an off -site SCM?
NO
COMPLIANCE WITH 02H .1003(4)
7
Width of ve etated 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 S stem
12
Bioretention Cell
13
Wet Pond
6
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
lBayfilter
26
IFilterra
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Charlie Yowell
28
Or anization:
Bohler Engineering ,NC PLLC.
29
Street address:
4130 Parklake Avenue #130, Raleigh, NC 27612
30
City, State, Zip:
Ralie h, NC, 27612
31
Phone numbers :
919 - 578 - 9000
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.
Seal
Signature of Designer
Date

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
6
3
Does this roiect have low H—ify areas?
No
4
If so number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
AREA INFORMATION
Entire Site
1
2
3
4
5
4
Type of SCM
Entire Site
Wet Pond 1
Wet Pond 2
Wet Pond 3
Wet Pond 4
Wet Pond 5
5
Total drainage area (sq ft
2279514
954469
409968
275299
472877
79408
6
Onsite drainage area (sq ft
2279514
954469
409968
275299
472877
79408
7
Offsite drainage area (sq ft
0
0
0
0
0
0
8
Total BUA in project (sq ft)
794195
334064 sf
147998 sf
87991 sf
160778 sf
36067 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
794195
334064
147998
87991
160778
36067 sf
10permitting)
New BUA not on subdivided lots (subject to
sf
0
sf
sf
sf
sf
sf
11
Offsite BUA (sq ft
0
0
0
0
0
0
12
Breakdown of new BUA not on subdivided lots:
0
Parking (sq ft
0
0
0
0
0
0
Sidewalk (sq ft
0
0
0
0
0
0
Roof (sq ft
460800
205200
90000
32400
122400 sf
7200 sf
Roadway s ft
333395
128864
57998
55591
38378 sf
28867 sf
Future (sq ft
0
0
0
0
0
0
Other, please specify in the comment box
below (sq ft
0
0
0
0
0
0
13
New infiltrating permeable pavement on
subdivided lots (sq ft
0
0
0
0
0
0
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
0
0
0
0
0
0
15
Existing BUA that will remain (not subject to
ermitting) (sq ft
0
0
0
0
0
0
16
Existing BUA that is already permitted (sq ft
0
0
0
0
0
0
17
Existing BUA that will be removed (sq ft
0
0
0
0
0
0
18
Percent BUA
35%
35%
36%
32%
34%
46%
19
IDesign storm inches
N/A
1.0 in
1.0 in
1.0 in
1.0 in
1.0 in
20
IDesign volume of SCM cu ft
N/A
29032 cf
12808 cf
7746 cf
14029 cf
3032 cf
21
lCalculation method for design volume
N/A
Simple Method
Simple Method
Simple Method
Simple Method
Simple Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
6
3
Does this roiect have low H—ify areas?
No
4
If so number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
AREA INFORMATION
Entire Site
6
4
Type of SCM
Entire Site
Wet Pond 6
5
Total drainage area (sq ft
2279514
87493
6
Onsite drainage area (sq ft
2279514
87493
7
Offsite drainage area (sq ft
0
0
8
Total BUA in project (sq ft)
794195
27297 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
794195
27297 sf
10permitting)
New BUA not on subdivided lots (subject to
sf
0
sf
11
Offsite BUA (sq ft
0
0
12
Breakdown of new BUA not on subdivided lots:
0
Parking (sq ft
0
0
Sidewalk (sq ft
0
0
Roof (sq ft
460800
3600 sf
Roadway s ft
333395
23697 sf
Future (sq ft
0
0
Other, please specify in the comment box
below (sq ft
0
0
13
New infiltrating permeable pavement on
subdivided lots (sq ft
0
0
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
0
0
15
Existing BUA that will remain (not subject to
ermitting) (sq ft
0
0
16
Existing BUA that is already permitted (sq ft
0
0
17
Existing BUA that will be removed (sq ft
0
0
18
Percent BUA
35%
31
19
IDesign storm inches
N/A
1.0 in
20
IDesign volume of SCM cu ft
N/A
2412 cf
21
lCalculation method for design volume
N/A
Simple Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):