SW3210301_Supplement-EZ Form_20221222

SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMENT FORMS
PROJECT INFORMATION
1
Project Name
Cresswind - Phase 2 and 3
2
Project Area ac
107.1
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
1.06
5
Is this project High or Low Density?
High
6
1 Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
30
8
Will the vegetated setback remain vegetated?
Yes
9
Is BUA other that as listed in .1 0034 c-d out of the setback?
Yes
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Bioretention Cell
0
13
Wet Pond
2
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
17
Rainwater Harvesting RWH
0
18
Green Roof
0
19
Level Spreader -Filter StLS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
1 Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
Ba filter
0
26
Filterra
0
LOAD SUPPLEMENT FORMS
DESIGNER CERTIFICATION
27
Name and Title:
Matthew S. Kiker
28
Organization:
Thomas & Hutton
29
Street address:
1020 Euclid Avenue
30
City, State, Zip:
Charlotte, NC 28203
31
Phone numbers :
980-201-5507
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.
Ti
Signature of Designer
11-aa-aa
Date

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
2
3
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE
AREA INFORMATION
Entire Site
4
Type of SCM
N/A
Wet Pond
Wet Pond
5
Total BUA in project (sq ft)
1845405 sf
1228238 sf
617167 sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft)
1150000 sf
802500 sf
347500 sf
7
New BUA outside of subdivided lots (subject to
permitting) (sf)
695405 sf
425738 sf
269667 sf
8
Offsite - total area (sq ft)
sf
sf
sf
9
Offsite BUA (sq ft)
sf
sf
sf
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft)
273750 sf
186250 sf
87500 sf
Sidewalk (sq ft)
84889 sf
55631 sf
29258 sf
Roof (sq ft)
sf
sf
sf
Roadway (sq ft)
280471 sf
183857 sf
96614 sf
Future (sq ft)
56295 sf
N/A
56295 sf
Other, please specify in the comment box
below (sq ft)
sf
sf
sf
11
New infiltrating permeable pavement on subdivided
lots (sq ft)
sf
sf
sf
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft)
sf
sf
sf
13
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
sf
sf
sf
14
Existing BUA that is already permitted (sq ft)
sf
sf
sf
15
Existing BUA that will be removed (sq ft)
sf
sf
sf
16
Percent BUA
40%
65%
75%
17
Design storm (inches)
N/A
1 in
1 in
18
Design volume of SCM (cu ft)
N/A
105187 cf
49451 cf
19
Calculation method for design volume
N/A
Simple
Simple
ADDITIONAL
INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):

WET POND
1 Drainage area number
2 Design volume of SCM (cu ft)
GENERAL MDC FROM 02H .1050 '
Pond 03 Pond 04
100007 cf 49451 cf
3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
5
What are the side slopes of the SCM (H:V)?
3:1
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
Yes
9
What is the method for dewatering the SCM for maintenance?
DRAWDOWN
ORIFICE
PUMP
10
If applicable, will the SCM be cleaned out after construction?
Yes
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
No
No
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
Yes
16
Does the SCM follow the device specific MDC?
Yes
Yes
17 Was the SCM designed by an INC licensed professional?
OND MDC FROM 02H .1053 _
18 Method used
Yes
SA/DA
Yes
SA/DA
19
Has a stage/storage table been provided in the calculations?
Yes
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl)
559.00
562.50
21
Elevation of the main pool bottom -(top of sediment removal) (fmsl)
559.50
563.00
22
Elevation of the bottom of the vegetated shelf (fmsl)
564.50
566.50
23
Elevation of the permanent pool (fmsl)
565.00
567.00
24
Elevation of the top of the vegetated shelf (fmsl)
565.50
567.50
25
Elevation of the temporary pool (fmsl)
566.95
568.69
26
Surface area of the main permanent pool (square feet)
39712
20359
27
Volume of the main permanent pool (cubic feet)
177334 cf
68758 cf
28
Average depth of the main pool (feet)
4.78 ft
3.64 ft
29
Average depth equation used
Equation 3
Equation 3
30
If using equation 3, main pool perimeter (feet)
1160.0 ft
666.0 ft
31
If using equation 3, width of submerged veg. shelf (feet)
3.0 ft
3.0 ft
32
Volume of the forebay (cubic feet)
28875 cf
11430 cf
33
Is this 15-20 % of the volume in the main pool?
Yes
Yes
34
Clean -out depth for forebay (inches)
66 in
48 in
35
Design volume of SCM (cu ft)
100007 cf
49451 cf
36
Is the outlet an orifice or a weir?
Orifice
Orifice
37
If orifice, orifice diameter (inches)
4. in
3. in
38
If weir, weir height (inches)
39
If weir, weir length (inches)
-
-
40
Drawdown time for the temporary pool (days)
3
3
41
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
Yes
42
Are berms or baffles provided to improve the flow path?
No
No
43
Depth of forebay at entrance (inches)
78 in
60 in
44
Depth of forebay at exit (inches)
72 in
54 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
Yes
46
Width of the vegetated shelf (feet)
6 ft
6 ft
47
Slope of vegetated shelf (H:V)
6:1
6:1
48
Does the orifice drawdown from below the top surface of the
permanent pool?
Yes
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-
yr, 24-hr storm?
Yes
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MDC(9) is met.)
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
52
Are the dam and embankment planted in non -clumping turf grass?
Yes
Yes
53
Species of turfthat will be used on the dam and embankment
Bermuda
Bermuda
b4l
Has a planting plan been provided for the vegetated shelf?
Yes Yes
ADDITIONAL INFORMATION
55
Please use this space to provide any additional information about the
wet pond(s):