SW6200601_Supplement-EZ Form_20200605

SUPPLEMENT-EZ COVER PAGE
PROJECT INFORMATION
1 Project Name
2 Project Area (ac)
3 Coastal Wetland Area (ac)
4 ' Surface Water Area (ac)
5 Is this project High or Low Density?
6 Does this project use an off -site SCM?
`COMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet)
8 Will the vegetated setback remain vegetated?
9 Is BUA other that as listed in .1003(4)(c-d) out of the setback?
10 Is streambank stabilization proposed on this project?
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
23 StormFilter
24 Silva Cell
25 Bayfilter
.._.26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title:
28 Organization:
29 Street address:
30 City, State, Zip:
31 Phone number(s):
32 Email:
Roadmaster Truck School
7.85
0
0
High
No
0
Yes
Yes
Yes
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
Zak Shipman, PE -President
Shipman Engineering, PLLC
137 Middlegreen Place
Holly Springs, NC 27540
[phone]
[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.
•,SS/0 • ;L,y
SEAS--
r 035027 -
f/ �� ra�Q
Z\�\
��111111��,
Seat
Signature of Desig
Z 2� b
Date

DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so, number of drainage areas/SCMs 1
Is ail/part of this project subject to previous rule
3 versions? ._ __. ,_- .__ _ No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site. '!
W
4 Type of SCM _; Wet Pond
5 Total BUA in project (sq ft) 182890 sf 85948 sf �
New BUA on subdivided lots (subject to
6 permitting) (sq ft)
New BUA outside of subdivided lots (subject to _
7 permitting) (sf) 85948 sf,
Offsite - total area (sq ft)
9 Offsite BUA (sq ft)
10 Breakdown of new BUA outside subdivided lots:
t - Parking (sq ft)
29897 sf
18298 sf
i - Sidewalk (sq ft)
1503 sf
617 sf
- Roof (sq ft)
10611 sf
10611 sf
T
- Roadway (sq ft)
9385 sf
7966 sf
- Future (sq ft)
r
- Other, please specify in the comment box
below (sq ft)
49237 sf
48456 sf
New infiltrating permeable pavement on
11 X subdivided lots (sq ft)
New infiltrating permeable pavement outside of
12 !,subdivided lots (sq ft)
Exisiing BUA that will remain (not subject to
13 permitting) (sq ft)
14 i Existing BUA that is already permitted (sq ft)
82257 sf
157 Existing BUA that will be removed (sq ft)
39631 sf
28887 sf
16 Percent BUA
53%
75%
17 Design storm (inches)
1 in
18 Design volume of SCM (cu ft)
6915 cf
19Calculation method for design volume
Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
the
20 drainage area(s):
Other BUA is the concrete test pad shown.
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM
-.
N/A
5 Total BUA fr©m project (sq ft)
.
wit
6 i 1995 rules
;
SL 2006-246.
2008 rules
2017 rules
182890 sf
85948 sf
`
New BUA on subdivided lots (subject to
7 -permitting) (sq ft)
1995 rules
SL 2006-246
+ 2008 rules
— 2017 rules -
f
New BUA outside of subdivided lots (subject
8 to permitting) (sf)
i 1995 rules
SL 2006-246
2008 rules
z
2017 rules
i 85948 sf
9 Offsite - total area (sq ft)
1995 rules
SL 2006-246
---
2008 rules
j
rules
;
h2017
10 , Offsite BUA (sq ft)
1995 rules
SL 2006-246

2008 rules
2017 rules
11
Design storm (inches)
1995 rules
SL 2006-246
2008 rules
2017 rules_ . �v�..�-.r._a�
1 in
12
Breakdown of new BUA:
^
- Parking (sq ft)
29897 sf
18298 sf
- Sidewalk (sq ft
1503 sf
617 sf
- Roof (sq ft)
10611 sf
10611 sf
- Roadway (sq ft)
9385 sf
7966 sf
- Future (sq ft)
- Other, please specify in the comment box
y^below (sq ft)
49237 sf
48456 sf
New infiltrating permeable pavement on
13
subdivided lots (sq ft)
I New infiltrating permeable pavement outside of
14
I subdivided lots (sq ft)
f
Exisitng BUA that will remain (not subject to
1
15
permitting) (sq ft)
82257 sf
1.6
Existing BUA that is already permitted (sq_ ft�
17
Existing BUA that will be removed (sq ft)
39631 sf
28887 sf
18
_
Percent BUA _ate
53% _
75%
19
Design volume of SCM (cu ft)
6915 cf
20
�_
Calculation method for design volume
Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional
F
21
! information about the drainage area(s):

Nw4flU =ek
1 Drainage area number E
1
2 Design volume of SCM (cu ft)
6915 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
Does the SCM have retaining walls, gabion walls or other engineered
�6 side slopes?
No
Are the inlets, outlets, and receiving stream protected from erosion
7 (10-year storm)?
Yes
Is there an overflow or bypass for inflow volume in excess of the
8 design volume?
Yes
9 What is the method for dewaterin the SCM for maintenance?
g
Pump referred
P (preferred)
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
If the SCM is on a single family lot, does (will?) the plat comply with
13 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 designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H .1053
18 Method used
SA/DA
19 Has a stage/storage table been provided in the calculations?
Yes
Elevation of the excavated main pool depth (bottom of sediment
20 removal) (fmsl)
191.00
21 Elevation of the main pool bottom -(top of sediment removal) (fmsl)
192.00
22 Elevation of the bottom of the vegetated shelf (fmsi)
195.50
23 Elevation of the permanent pool (fmsl)
196.00 _
4 24 Elevation of the top of the vegetated shelf (fmsl)
196.50
25 Elevation of the temporary pool (fmsl)
196.73
26 Surface area of the main permanent pool (square feet)
8135:1 T
27 Volume of the main permanent pool (cubic feet)
8515 cf
28 Average depth of the main pool (feet)
3.36 ft
29 Average depth equation used
Equation 2
30 If using equation 3, main pool perimeter (feet)
31 If using equation 3, width of submerged veg. shelf (feet)
32 Volume of the forebay (cubic feet)
3948 cf y
33 Is this 15-20% of the volume in the main pool?
Yes
34 Clean -out depth for forebay (inches)
12 in
35 Design volume of SCM (cu ft)
6915 cf
36 Is the outlet an orifice or a weir?
Orifice
37 If orifice, orifice diameter (inches)
2 in
38 If weir, weir height (inches)
39 If weir, weir length (inches)
I
40 Drawdown time for the temporary pool (days)
2.64 _
Are the inlet(s) and outlet located in a manner that avoids short-
41 circuiting?
Yes
42`Are berms or baffles provided to improve the flow path?
No
43 Depth of forebay at entrance (inches)
60 in
44 Depth of forebay at exit (inches)
6 in
45 Does water flow out of the forebay in a non -erosive manner?
Yes
46 Width of the vegetated shelf (feet)
6 ft
47 Slope of vegetated shelf (H:V)
6:1
Does the orifice drawdown from below the top surface of the
48 permanent pool?
Yes
Does the pond minimize impacts to the receiving channel from the 1-
49 yr, 24-hr storm?
Yes
Are fountains proposed? (If Y, please provide documentation that
50 MDC(9) is met.)
No
51 Is a trash rack or other device provided to protect the outlet system?
Yes
52Are the dam and embankment planted in non -clumping turf grass?
Yes
_ 53 Species of turf that will be used on the dam and embankment
Bermuda
_...n_...._54 Has a planting plan been provided for the vegetated shelf?
No
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
55 wet pond(s):
Wet Pond 1 12:00 PM 5/21/2020