SW4210704_Supplement-EZ Form_20220218

SUPPLEMENT-EZ COVER PAGE
R MS LOADED
Fk0i EC-T IN F-JR MATION
I I Project Name
i Dolcetto
2 Project Area (ac)
77.281----,-----]
3
Coastal Wetland Area (ac)
0 1
4
Surface Water Area (ac)
0.45
I Both - H - igh and Low Density___,___
No -J
5
Is this project High or Low Density?
6
Does this project use an off -site SCM?
11
Infiltration System
12
Bioretention Cell
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16ESand
Filterz
17
Rainwater Harvestina (RWH)
18
Green Roof
19
Level Spreader -Filter Strip (LS-FS)
20
21
Disconnected Impervious Surface (DIS)
Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
26
Bayfilter
Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title:i.
28 lorganization:
29 Street address: J-
30 CitV. State. Zip: I
32
Thomas R. Glover, Jr., PE - Engineer
Jamestown Engineer R9 _Group,
POBox 365-117E.Main St.
Jamestown, NC 27282
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.
CA
SEALV,
, Signa of Designer
2.711- IV,> 3
f-zhbl
Seal Date

DRAINAGE AREAS
1 Is this a high density ro"ect? Yes
2 If so, number of drainage areas/SCMs _ 1
3 Does this 2roject have low density areas? Yes I
4 If so, number of low density drainage areas 1
Is all/part of this project subject to previous rule i
5 versions? No
FORMS LOADED
9;!M6GE AREA INFORMATION
Entire Site
1
L© #
4
: Type of SCM
-
5
ITotal drainage area (sq ft
3366316
566280
3366316
1
6
`Onsite drainage area (sq ft
3366316
566280 -
3366316
7
Offsite drainage areas ft
0
0
0
8
JTotal BUA in pLoject (sq ft
582314 sf
233482 sf
582314 sf
New BUA on subdivided lots (subject to permitting)
9
s ft
476000 sf
192000 sf
476000 sf
New BUA not on subdivided lots (subject to
10
permitting)s
106314 sf
41482 sf
106314 sf
11
Offsite BUA s ft
sf
sf
sf
d
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft
1329 sf
1329 sf
1329 sf
-Sidewalks ft
sf
sf
sf -
_
- Roofs ft
sf�sf
sf
- Roadways ft
104705 sf
39873 sf
164705 sf
- Future (sq ft
sf
sf
sf
- Other, please specify in the comment box
below (sq ft
280 sf
280 sf
280 sf
New infiltrating permeable pavement on
13
subdivided lots (sq ft
sf
sf
sf
New infiltrating permeable pavement not on
14
subdivided lots (sq ft
sf
sf
sf
Existing BUA that will remain (not subject to
..�..�
sf
15permitting)
s ft
sf
� sf
16
Existing BUA that is already permitted (sq ft
sf
sf µ
sf
17
1 Existing BUA that will be removed s ft
sf
sf
m_ sf
18
Percent BUA
17%
41°l0
17%0
19
Design storm inches
1.0 in
1.0 in J�
j 1.0 in
20
Design volume of SCM cu ft
n!a r
19857 cf
_ n!a oM
21
Calculation method for design volume
INFORMATION
n!a
Simple, Method
n%a
-ADDITONAL
Please use this space to provide any additional information about the
22 ydrainagearea(s):
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 kiosk

LOW DENSITY
1
-- ICIV I o run wry -1- c 1 rnwca i a mum vcn .!Wa
Is project below density thresholds set forth in the applicable stormwater rule?
__ Yes
2
Does project maximize dispersed flow and minimize channelization of flow?
R
j Yes
3
Has the use of piping been minimized per .1003(2)(c)?
No
4
Side slopes of the vegetated conveyances (H:V)
[ 3:1
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
;� 5.3
6
Are curb outlet swales proposed?
Yes
7
8
Maximum longitudinal slope of curb outlet swale(s) (%)
Bottom width of curb outlet swale(s) (feet)
r 2%
h 6-10-
9
Maximum side slope of curb outlet swale(s) (H:V)
3:1
10
Minimum length of curb outlet swale(s) (feet)
i
11
Are treatment swales used instead of curb outlet swales?
i No
12
Is stormwater released at the edge of the setback as dispersed flow?
�100_ft
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
ADDITIONAL
15
JAre variations to rule .1003 proposed?
iNF09MATION
_.
!Please use this space to provide any additional information about this low density project:
Yes
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 discharge for the project.
Swale
#
Drainage Pervious
A6UA area C Q Slope Va..V,tt,,,, Flow depth
Area
re (ac) ac (cfs) N (fps) (fps) (ft)
(ac1
Swale ID
1.17
0.35
0.82
0.65
5.25
2.00
5.50
3.51
0.38
1-13
1.41
0.42
0.99
0.65
6.32
2.00
5.50
3.61
0.44
1-12
3
�4
0.86
0.26
0.60
0.65
3.86
2.60
5.50
3.68
0.26
1-11
..
1.20
0.36
0.84
0.65
5.38
2.60
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
1-10B
6
�7
0.39
0.12
0.27
0.65
1.75
4.80
5.50
3.86
0.12
1-9A
0.85
0.26
0.60
0.65
3.81
4.80
5.50
4.69
0.20
1-9B
8
0.14
0.04
0.10
0.65
0.63
7.40
5.50
3,30
0.05
1-8.1
_
T10 _
0.86
0.26
0.60
0.65
3.86
4.80
5.50
4.69
0.21
1-8.2
0.40
0.12
0.28
0,65
1.79
5.30
5.50
3.99
0.11
1-7A-A
11
1.42
0.43
0.99
0.65
6.37
5,30
5.50
4.92
0.26
1-7A-B
12P
w134
0.40
0.12
0.28
0.65
1.79
5.30
5.50
4.02
0.11
1-7A
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
0.65
1.44
6.10
5.50
3.94
0.09
1-6A
15
0.39
0.12
0.27
0.65
1.75
6.10
5.50
4.20
0.11
1-6B
4 16
0.40
0.12
0.28
0.65
1.79
5.00
5.50
3.93
0.11
1-5A
17_
~18
0.70
0.21
0.49
0.65
3.14
5.00
5.50
4.55
0.17
1-5B
0.10
0.03
0.07
0.65
0.45
10.00
5.50
3.18
0.04
1-4
19
µ20
1.16
0.35
0.81
0.65
5.20
7.80
5.50
5.07
0.19
1-3
0.24
0.07
0.17
0.65
1.08
7.80
5.50
3.96
0.07
1-2A
21
0.78
0.23
0.55
0.65
3.50
7.80
5.50
4.74
0.15
1-2B
22
0.24
0.07
0.17
0.65
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
1-1 B
24^
0.15
0.05
0.11
0.65
0.67
9.50
5.50
3.74
0.05
EX B
25
0.50
0.15
0.35
0.65
2,24
1.50
5.50
2.64
0.21
EX A
__26
0.76
0.23
0.53
0.65
3.41
3.20
5.50
3.32
0.13
2-6
J 27
0.37
0.11
0.26
0.65
1.66
6.30
5.50
4.18
0.10
2-5
28__.
0.29
0.09
0.20
0.65
1.30
7.40
5.50
4.12
0.08
2-4A
29
0.36
0.11
0.25
0.65
1.61
7.40
5.50
4.38
0.09
2-4B
_ 30
0.40
0.12
0.28
0.65
1.79
5.30
5.50
3.99
0.11
2-3A

31
0.92
0.28
0.64
0.65
4.13
5.30
5.50
4.95
0.21
2-3B
32
0.40
012
0.28
0.65
1,79
5.30
5.50
4.00
0.11
2-2A
33
A34_
0.61
0.18
0.43
0.65
2.74
5.30
5.50
4.50
0.15
2-26
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
4-7B
36
0.40
0.12
0.28
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
5.50
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
~42
0.80
0.24
0.56
0.65
3.59
5.20
5.50
4.76
0.19
4-46
0.46
0.14
0.32
0.65
2.06
6.40
5.50
4.46
0.12
4-3.1
43
0.50
0.15
0.35
0.65
2.24
3.60
5.50
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
5.50
2.88
0.52
5-8
47
0.55
0.17
0.39
0.65
2.47
4.60
5.50
4.15
0.15
5-7A
48_
2.01
0.60
1.41
0.65
9.01
4.60
5.50
4.93
0.33
5-7B
49
0.49
0.15
0.34
0.65
2 20
4.60
5.50
4.02
0.14
5-6
50
1.25
0.38
0.88
0.65
5.61
1.90
5.50
3,47
0.41
5-5.1
51
1.00
0.30
0.70
0.65
4A9
2.80
5.50
3.91
0.29
5-5.2A
52
�53_
1.36
0.41
0.95
0.65
6.10
2.80
5.50
4.14
0.37
5-5.2B
0.50
0.15
0.35
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
5.50
3.62
0.21
5-4.2
55
0.45
0.14
0.32
0.65
2.02
2.90
5.50
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
57
0.41
0.12
0.29
0.65
1.84
5.10
5.50
3.98
0.12
6-4.2
58
v59
0.48
0.14
0.34
0.65
2.15
3.70
5.50
3.69
0.15
6-3
4.99
1.50
3.49
0.65
22.38
2.00
5.50
4.08
0,61
COS 4-1
60 -
9.57
2.87
6.70
0.65
42.92
2.00
5.50
4.70
0.83
COS 5-1
61
2.25
0.68
1.58
0.65
10.09
2.00
5.50
3A8
0.35
COS 6-1

DRY POND
n a area number 1
Drain
2 Minimum
m required treatment volume (cu ft) 19857 cf
GENERAL rVIDC FROM 02H .1050 _ - - --
31 Is the SCM sized to treat the SW from all surfaces at build -out? No
41 Is the SCM located away from contaminated soils?
5
_Yes
What are the side slopes of the SCM (H:V)? I 3:1
6
Does the SCM have retaining walls, gabion walls or other engineered i--
side slopes? No
7
Are the inlets, outlets, and receiving stream protected from erosion
10- ear storm)? Yes
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? i 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
1 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 N/A
General MDC 10 ?
14
1 Is there an O&M Agreement that complies with General MDC (11)? i Yes
15
Is the an O&M Plan that complies with General MDC (12)? I Yes
16
Does the SCM follow the device specific MDC? Yes
----
17
Was the SCM desi ii b an NC licensed rofessional? Yes
'DRY PQND
MDC FRAM 02H .1062
�18iSHWT
elevation (fmsl)� J � �h -�� 718
19J
Elevation of the bottom of the dry pond (fmsl) I 720w
20
21
Distance from bottom to SHWT (feet) 2 ft
Elevation of the temporary pool during the design storm (feet) 10 ft
22
23
Ponding depth of the design storm (feet) — 10_f
Will the dry pond be uniformly graded to flow toward the outlet?
24
Is a tow 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
d Swales
What method of pretreatment will be provided? i G!s:�28381
28
Design volume of SCM (cu ft)
29
30
Diameter of drawdown orifice (in) I 1625 in
Drawdown time for the temporary pool (hours) 50,6
31
Does the pond minimize impacts to the receiving channel from the 1- : Yes
r, 24-hr storm?
32
Is there a small permanent pool near the orifice to prevent clogging? _ Yes
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 € __. ,.. .,4_...._.w_...^
embankment? i Yes
AVVI IIVIY!'1L IIYr Vf\IYIAI IVIY -x :: � +
37 Please use this space to provide any additional information about the
dry pond(s):
Dry Pond 1 3:32 PM 2/18/2022