SW4210704_Supplement-EZ Form_20211210

7 IN
7-537TTM
FORMS LOADED
PROJECT INFORMATION
1
2
Project Name
Dolcetto
_ _—..... __ 77.2$
0
Project Area (ac)
3
Coastal Wetland Area (ac)
4
5 _GIs
$
Surface Water Area ac
this proLct High or Low Density? _
1 Does this project use an off -site SCM?
— 0.45
Both High and Low Density
No
COMPLIANCE WITH .02H .1003 4
7
Width of vegetated setbacks provided ifeet — —_
30
8
Will the vegetated setback remain vegetated?
_ Yes
9
10
If BUA isproposed in the setback, dces itmeet NCAC 02H.100. (4)(c-0)?..
Is stmwt:b nk stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMS:
11
Infiltration S s� tem
---_----------
12
Bioretention Cell
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16
Sand Filter
17
Rainwater Harvestin RWH
18
Green Roof __..-_-_. ._.-------.___......
19
level Spreader_Filier Stnp jLS F
-
20 _
Disconnected Impervious Surface (DIS)
21
Treatment Swale
22
Ory,Pond ........_..._._....._..__...._.___.__._._......___.__......... ___.___
23
SlormFilter
24
Silva Cell
25
Bayfilter
_
26
Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27
28
Name and Title:
_Or anization _ ---
Thomas R. Glover Jr., PE - Engineer --_
_ Jamestown Engineering Group, Inc. ,-
29
Street address:
PO Box 365 - 117 E. Main St.
30 .
31
32
City, State, ZiQ;_ — _
Phone number(s): --_ -----_•— -
Email:
Jamestown, NC 27282
336-886-5523
[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 nsity project? _
Yes
2
If so, number of drains a areas/SCMs
1
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
fORMSLOADEQ
DRAINAGE AREA INFORMATION
Entire Site
1
LID 1
4
T e of SCM
5
Total drainage area (sq ft
3366316
566280
3366316
6
Onsite drainage area (sq ft
_
3366316
_
566280
3366316
�7
Offsite drainage area (sq ft
0
0
0
8
Total BUA in project (sq ft
582314 sf
233482 sf
582314 sf
New BUA on subdivided lots (subject to permitting)
476000 sf
192000 sf
476000 sf
10
,New BUA not on subdivided lots (subject to
permittin �sf) M_ _ _ _ �._ __. .
106314 sf
41482 sf
106314 sf
11
Offsite BUA s ft
sf
sf
sf
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft
1329 sf
1329 sf
1329 sf
_
_,•Sidewalk(sg fly_
sf
sf
sf
Roof (sq ft
sf
sf
sf
Roadway s ft
104705 sf
39873 sf
104705 sf
Future (sq ft
sf
_ sf
sf
Other, please specify in the comment box
280 sf
_ _ 280 sf
280 sf
j 13
New infiltrating permeable pavement on
subdivided lots (sq ft)
sf
sf
A sf
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
sf
sf
sf
15permitting)
Existing BUA that will remain (not subject to
s ft
sf
sf
sf
that Is alread ermitted s ft
sf
sf
sf
BUA that will be removed s ft
sf
sf
sf
nt BUA
17%
41%
17%
L16ExistingBUA
n storm inches
1.0 In
1.0 in
1.0 In
n volume of SCM cu ft
Na
19857 cf
nta
ation method for design volume
n/a
Simple Method
We
ADDITIONAL INFORMATION___
Please use this space to provide any additional information about the
22 drainage areal _
1. The drainage area to the dry pond is shown for clarity and this Is not in fact
a high -density drainage area within the project.
12. other = BUA list is for the mail klosk

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY ROJECTS FROM 02H .1003
1
Is project below density thresholds set forth in the applicable stormwater rule?
Yes
2 1
Does project maximize dispersed flow and minimize channelization of flow?
Yes
3
Has the use of plping been minimized per.1003(2)(c)?
No
4
Side slopes or the vegetated conveyances (H:V)
3:1
5
Maximum velocity in the vegetated conveyances during the 10 ear storm?
5.3
6
Are curb outlet swales proposed?
Yes
7
_
Maximum longitudinal slope of curb outlet swales) (%)
2%
8
Bottom width or curb outlet swales) (feet)
6-10,
_._9
---Maximum side slope of curb outlet swale(s) (H:V) - -- ---
3:1
10
11
Minimum length of curb outlet le(s) (feet) �-
___ __ _
Are treatment swales used instead of curb outlet swales?
_ 100 ft
No
12
Is stormwater released at the edge of the setback as dis rsed flaw?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
Are variations to rule .1003 proposed?
Yes
ADDITIONAL
INFORMATION
15 1
Please use this space to provide any additional information about this low density project:
Vegetated swales, with some storm piping, in addition to curb outlet systems and a dry detention pond are being used Instead of
vegeated swales with only incidental piping. The proposed combination will reduce the chances of erosion, thus keeping an equal
or better water quality dischme for the project.
Swale
g
Drainage
(at)
BUA
(ac)
Pervious
as a
p
(cfs)
-Slope,'
he)
V.,,,,
(fin)
V,0„ Flow depth
(fps)O
Swale ID
1
1.17
0.35
0.82
0.66
5.25
2.00
5.60
3.51
0.38
1-13
2
1A1
0.42
0.99
0.65
6.32
2.00
5.50
3.61
0.44
1-12
3
0.86
0.26
0.60
0.65
3.86
2.60
5.50
3.68
0.26
1-11
4
1.20
0.36
0.84
0.65
5.38
2.60 1
5.50
3.93
0.34
1-10A
5
1.79
0.54
1.25
0.65
8.03
2.60
5.50
4.18
0.48
1-108
6
0.39
0.12
0.27
0.65
1.75
4.80
5.50
3.86
0.12
1-9A
7
0.85
0.26
0.60
0.65
3.81
4.80
5.60
4.69
0.20
1-9B
8
0.14
0.04
0.10
0165
0.63
7.40
5.50
3.30
0.05
1-8.1
9
0.86' -
0.26
0.60
0.65
3.86
4.80
5.50
4.69
0.21
1.8.2
10
0.40
0.12
0.28
0.65
1.79
5.30
6.50
3.99
0.11 1
1-7A-A
11
1A2
0.43
0.99
0.65
6.37
5.30
5.50
4.92
0.26 1
1-7A-B
12
0.40
0.12
0.28
0.66
1.79
5.30
5.50
4.02
0.11
1-7A
13
0.97
0.29
0.68
0.65
4.35
5.30
5.50
5.01
0.22
1-7B
14
0.32
0.10
0.22
0.66
1.44
3.94
0.09
1-6A
15
0.39
0.12
0.27
0.65
1.75
6.50
4.20
0.11
1-6B
16
0.40
0.12
0.28
0.65
1.79
5.50
3,93
0.11
1-5A
17
0.70
0.21
0.49
0.65
3.14
il5.50
5.60
4.55
0.17
1-5B
18
0.10
0.03
0.07
0.65
0.45
5.50
3.18
0.04
1-4
79.
1.18
0.35
0.81
0.65
5.20
7.80
5.50
5.07
0.19
1-3
=20
0.24
0.07
0.17
0.65
1.08
7.80
5.60
3•96
0.07
1-2A
;.31.
0.78
0.23
0.55
0.65
1 3•50
7.80
5.50
4.74
0.15
1-28
22
0.24
0.07
0.17
0.65
1 1.08
8.20
5.50
4.03
0.07
1-1A
23
0.44
0.13
0.31
0.65
1.97
8.20
5.50
4.83
0.10
1-18
24
0.15
0.05
0.11
0.65
0.67
9.50
5.50
3.74
0.05
1 EX B
25
0.50
0.15
0.35
0.66
2.24
1.50
5.50
2.64
0.21
EX A
28
0.76
0.23
0.53
0.65
3.41
3.20
6.50
3.32
0.13
2-6
27
0.37
0.11
0.26
0.65
1.66
6.30
5.50
4.18
0.10
2-5
0.29
0.09
0.20
0.65
1.30
7.40
5.50
4.12
0.08
2-4A
It
-0.38
-0.11
0.25
0.65
1:61
7.40
5.50
4.38
0.09
2-4B
0.40
0.12
0.28
0.65
1 1.79
1 6.30
5.50
3.99
1 0.11
1 2-3A

31
0.92
0.28
0.64
0.65
4.13
6.30
5.50
4.95
0.21
2-3B
32
0.40
0.12
0.28
0.65
1.79
5.30
5.50
4.00
0.11
2-2A
33
0.61
0.18
0.43
0.65
2.74
5.30
5.50
4.50
0.15
2-2B
34
0.40
0.12
0.28
0.65
1.79
5.20
5.50
3.98
0.11
4-7A
35
1.07
0.32
0.75
0.65
4.80
5.20
5.50
4.52
0.21
4-78
35
0.40
0.12
0.28
1 0.65
1.79
5.20
5.50
3.98
0.11
4-6A
37
1.08
0.32
0.76
0.65
4.84
5.20
6.50
4.53
0.21
4-6B
38
0.40
0.12
0.28
0.65
1.79
5.20
5.50
4.02
0.12
4-5A
39
0.61
0.18
0.43
0.65
2.74
5.20
5.50
4.46
0.15
4-5B
40
0.40
0.12
0.28
0.65
1.79
5.20
5.50
3.98
0.11
4-4A
41
0.80
0.24
0.56
0.65
3.59
5.20
5.50
4.76
0.19
4-4B
42
0.46
0.14
0.32
0.65
2.06
6.40
1 5.50
4.46
0.12
4-3.1
43
0.50
0.16
0.36
0.65
2.24
3.60
5.60
3.70
0.15
4-3.2
44
0.30
0.09
0.21
0.65
1.35
3.70
5.50
3.27
0.11
5.9.1
45
1.49
0.45
1.04
0.65
6.68
1.20
5.50
2.92
0.57
5-9.2
46
1.33
0.40
0.93
0.65
5.97
1.20
5.60
2.88
0.52
5-8
47
0.55
0.17
0.39
0.65
2.47
4.60
5.50
4.15
0.16
5-7A
' 48 `
2.01
0.60
1.41
0.65
9.01
4.60
5.50
4.93
0.33
6-78
-49
0.49
0.16
0.34
0.65
2.20
4.60
5.50
4.02
0.14
5 e
60
I J5
0.38
0.86
0.65
5.61
1.90
5.50
3.47
0.41
5-5.1
51
1.00
0.30
0.70
0.65
4.49
2.80
5.50
3.91
0.29
5-5.2A
52
1.36
0.41
0.95
0.65
6.10
2.80
5.50
4.14
0.37
5.5.2B
63
0.50
0.15
0.36
0.65
2.24
1.90
5.50
2.91
0.19
5.4.1
54
0.68
0.20
0.48
0.65
3.05
2.80
5.60
3.62
0.21
5-4.2
65
0.45
0.14
0.32
0.65
2.02
2.90
5.60
3.32
0.15
6-5
56
0.47
0.14
0.33
0.65
2.11
3.30
5.50
3•53
0.15
6-4.1
67
0.41
0.12
0.29
0.65
1.84
5.10
5.50
3.98
0.12
6.4.2
58
0.48
0.14
0.34
0.65
2.15
3.70
5.50
3.69
0.15
6-3
59 -
4.99
1.50
3.49
0.65 1
22.38
1 2.00
5.50
4.08
0.61
COS 4-1
50
9.57
2.87
6.70
0.65
42.92
2.00
5.50
4.70
0.83
COS 6-1
sir.
2.25
0.68
1 1.58
0.65
10.09
2.00
5.50
3.18
0.35
COS 6-1

11
Drainage area number
21Minimum
required treatment volume (cu ft)
19857 cf
GENER
L MDC FROM121,11JOSO
3
Is thesized to treat the SW from all surfaces at build -out?
No
4
_SCM
Is the SCM located away from contaminated soils?
Yes
5
What are the side slopes of the SCY
3:1
6
Does the SCM have retaining walls, gablon walls or other engineered
side slopes?
No
7
._.(10:year
Are the inlets, outlets, and receiving stream protected from erosion
storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
9
What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
L
icable, licable, will the SCM be cleaned out after construction?
!f appl
j T
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
Does the drainage easement comply with General MDC (9)?
Yes
­­12
13
14
If the SCM is on a single family lot, does (will?) the plat comply with
General
Is there an O&M Agreement that complies with General MDC (11)?
NIA
Yes
15
Is there an O&M Plan that com lies with GeneralM
Yes
16
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM designed by an NC licensed professional?
Yes
DRY. POND
MIX FROMQZN 41062'�
18
SHWT elevation (fmsi)
718
19
Elevation of the bottom of the dry pond (fmsi)
720
20
Distance from bottom to SHWT (feet)
2 ft
21
Elevation of the tem ora ool during the design storm feet
loft
22
23
2_4Is
25
Pondi 9.depth of the design storm (feet)
Will the dry pond be uniformly graded to flow toward the outlet?
ilow --flow channel beingprovided?
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
loft
Yes
No
Yes
261WHI
berms or baffles be provided to increase the flow path?
No
What method ofSCMretreatment will be provided?
Grassed Swales
28
—
Desian volume of SCIA%
28381
29
Diameter of drawdown orifice in
2 In
r27
30
Drawdown time for the temporary pool (hours)
50.6
3 1
1
32jIs
Does the pond minimize impacts to the receiving channel from the 1-
r, 24-hr storm?
there a small permanent pool near the orifice to prevent clogging?
Yes
Yes
33
3q4Are
Will the outlet be designed to pL�vent !K
the dam and embankment planted in non -clumping turf grass?
Yes
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
embankment?
Yes
ADDITIONAL
INFORMATION
Please use this space to provide any additional information about the
37
Dry Pond 1 10:33 AM 12/6/2021