SW3191203_Supplement-EZ Form_20191227

SUPPLEMENT-EZ COVER PAGE
FORMSLOADEn 71
use an o&site
COMPLIANCE WITH 02H .10031
7
WMIh of vegetated setbacks prawnfeet
WA
8
WPI the vegetated setback remaln v
NIA
9
Is BUA other Nat as listed in .10D3 4 W out of the selbeck7
WA
10
Is slreambank stabilbation ProPoseO on Utis prolecf7
WA
NUMBER AND TYPE OF SCM-:
11
Infiltration System
0
12
Bloretenion Cell
0
13
Wet Pond
0
14
Sto/mwater Wetland
0
15
Permeable Pavement
0
16
Sand Finer
0
17
Ralmvater Harvestin RWH
0
18
Green Roof
0
19
Level Spreader -Filter Sm LS-FS
0
20
Disconnected Im viours Surface (DIS)
0
21
Treatment Swale
0
22
D Pond
0
23
StomnFtBer
0
24
Silva Cell
0
25
B Ater
0
26
FA a"
0
FORMS LOADED
DESIGNER
CERTIFICATION
Name and Title: Kevin E. Herring PE
27
28
OrganizaliGm
Kevin E. Herfing Engineeft
29
Street address:
16101 Silver Road
30
City, State,
Danboro, NC 28120
31
Phone num s :
980-621-D935
32
Email:
kevinCkeNntteningengineedng.corn
cartincoon Statement:
I certify, under penalty of law that this Supplement-EZ form arw all supporosig information were prepared under my direction or
supervision; that the iniomation provided In the form is, to the best of my knowledge and What, More, accurate, and complete; and Net
the engineering plans, specifications. operation and maintenance agreements and other supporting information are consistent with the
MionnaE provided here.
CAR
o
,.•`�N���.,
'bQOFESSIpyq vy',
?Q ! Is
SEAL -
20165
Sigrt6w of Designer
1 a 2.1 1
Date

DRAINAGE AREAS
1
Is this a high density project?
No
2
_
1 If so, number of drain a areas/SCMIS
1
3
Is all/part of this project subject to previous rule
versions?
I No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
4
Type of SCM
-Vegetative Swale
5
Total BUA in project s ft
110270 sf
6
New BUA on subdivided lots (subject to permitting)
ft
81000 sf
7permitting)
New BUA outside of subdivided lots (subject to
s
8
Orfsite - total area ft
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft
4244 at I
- Sidewalks ft
- Roof (sq ft
- Roadway sg ft
24972 of I
- Future (sq ft
- Other, please specify In the comment box
below (sq ft
54 of
11
New infiltrating permeable pavement on
subdivided lots (sg ft
12
New infiltrating permeable pavement outside of
subdivided lots (sg ft
13
Exisitng BUA that will remain (not subject to
ennitting) (sq ft
14
E)dstinq BUA that is already permitted 02 ft
15
E)dstinq BUA that will be removed (sq It
16
Percent BUA
23.85%
17
Design storm inches
1 In
18
Desi n volume of SCM Cu ft
19
Calculation method for design volume
ADDITIONAL INFORMATION
20
Please use this space to provide any additional Information about the
drainage area(,):
54' Other BUA is concrete pad used for Cluster Mailbox
)riveways in RAW
Vew Street

I nW DENSITY
DESIGN
RE IREMENTS FOR LOW DENSITY PROJECTS FROM 2N .1005
1
project below density thresholds set forth in the applicable stonnwater rule?
Yes
2
Does project maximize dispersed flax and minimize channelization of flow?
Yes
3
Has the use of piping been minimized per .1003(2)(c)?
Yes
4
FBoIs
Side slopes of the vegetated conveyances (H:V)
3.5:1
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
2.16 fps
6
Are curb outlet Swaim proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (%)
8
ttom width of curb outlet swele(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 sweles?
12
Is stonnwater released at the edge of the setback as dispersed flow?
Yes
13
Have stonnwater outlets been designed to prevent downslope erosion?
Yes
14
Are vanations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
Rodaslde Ditichas to be ualized for required conveyances
Swala
*
Drainage
Area
o
BUA
(eo)
Pervious
area
ae
C
Q
(tfs)
Slope
(%)
V.
(fps)
V.
(fps)
Flow depth (11)
1
0.22
Vanes
0.50
0.84
1.50
4.50
1.38
0.37
2
1.09
Vanes
0.50
4.24
1.00
4.50
1.78
0.76
3
1.30
Varies
0.50
5.03
1.50
4.50
2.16
0.75
4
6
6