SW4210701_Supplement-EZ Form_20211229

SUPPLEMENT-EZ COVER PAGE
RMS LOADL
PROJECT INFORMATION
1
1 Project Name
Project Area ac
Coastal Wetland Area ac
King's Crossing
2
149.68
3
N/A
4
Surface Water Area ac
3.88
5
Is this project High or Low Density?
High
6
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
If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
N/A
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
5
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 Strip LS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
22
1 Dry Pond
23
StormFilter
Silva Cell
Bayfilter
Filterra
24
25
26
FORMS LOADED
DESIGNER CERTIFICATION
27
IName and Title:
Organization:
Street address:
Harris B. Gu ton, P.E.
28
Gu ton's Royal Design Group, P.A.
29
P.O. Box 1070
King, N.C. 27021
30
City, State, Zip:
31
Phone numbers :
336-985-6519
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.
Signature of Designer
Date

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
5
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
2
3
4
5
4
Type of SCM
Wet Ponds
Wet Pond
Wet Pond
Wet Pond
Wet Pond
Wet Pond
5
Total drainage area (sq ft
4071135.09
419722.29
959208.41
560584.33
365904
1765716.06
6
Onsite drainage area (sq ft
4071135.09
419722.29
959208.41
560584.33
365904
1765716.06
7
Offsite drainage area (sq ft
0
0
0
0
0
0
8
Total BUA in project (sq ft
1351119 sf
266244 sf
516333 sf
135972 sf
82764 sf
349806 sf
9
New BUA on subdivided lots (subject to permitting)
1 (sq ft
536952 sf
104383 sf
82764 sf
349806 sf
10permitting)
New BUA not on subdivided lots (subject to
s
814165 sf
266244 sf
516333 sf
31589 sf
11
Offsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft
467590 sf
159548 sf
292041 sf
16001 sf
sf
sf
Sidewalk (sq ft
124513 sf
23048 sf
55864 sf
22065 sf
3049 sf
20487 sf
Roof sq ft
511660 sf
63526 sf
139818 sf
54000 sf
47916 sf
206400 sf
Roadway s ft
213299 sf
20122 sf
28610 sf
43906 sf
31799 sf
88862 sf
Future (sq ft
Other, please specify in the comment box
below (sq ft
34056 sf
34056 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft
17
Existina BUA that will be removed (sq ft
18
Percent BUA
21%
63%
54%
24%
23%
22%
19
Design storm inches
4.3 in
4.3 in
4.3 in
4.3 in
4.3 in
20
Design volume of SCM cu ft
65210 cf
100198 cf
32426 cf
65236 cf
160459 cf
21 Calculation method for design volume Average Depth
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
12. Other is paved residential driveways
Average Depth
Average Depth
Average Depth
Average Depth
Average Depth

WET POND
1 Drainage area number #1 #2 #3 #4 #5
21
Minimum required treatment volume cu ft
21717 cf
42711 cf
12534 cf
7730 cf
33815 cf
GENERAL MDC FROM 02H .1050
31
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
Yes
Yes
Yes
Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
Yes
Yes
Yes
5
What are the side slopes of the SCM (H:V)?
3:1
3:1
3:1
3:1
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
No
No
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion
10- ear storm)?
Yes
Yes
Yes
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
desi n volume?
Yes
Yes
Yes
Yes
Yes
9
What is the method for dewatering the SCM for maintenance?
Other
Other
Other
Other
Other
10
If applicable, will the SCM be cleaned out after construction?
Yes
Yes
Yes
Yes
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
Yes
Yes
Yes
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
Yes
Yes
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC 10 ?
N/A
N/A
N/A
N/A
N/A
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
Yes
Yes
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
Yes
Yes
Yes
Yes
161
Does the SCM follow the device specific MDC?
Yes
Yes
Yes
Yes
Yes
171
Was the SCM designed by an NC licensedprofessional?
Yes
Yes
Yes
Yes
Yes
WET POND
MDC FROM 02H .1053 IL
18
Sizing method used
SA/DA
SA/DA
SA/DA
SA/DA
SA/DA
19
Has a stage/storage table been provided in the calculations?
Yes
Yes
Yes
Yes
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl
1054.00
1011.00
1032.00
1014.00
1044.00
21
Elevation of the main pool bottom (top of sediment removal) (fmsl)
1055.00
1012.00
1033.00
1015.00
1045.00
221
Elevation of the bottom of the vegetated shelf (fmsl)
1059.00
1016.00
1037.00
1019.00
1049.00
23
Elevation of the permanent pool (fmsl)
1059.00
1016.00
1037.00
1019.00
1049.00
24
Elevation of the top of the vegetated shelf (fmsl)
1060.00
1017.00
1038.00
1020.00
1050.00
25
Elevation of the temporary pool (fmsl)
1063.00
1020.00
1040.00
1021.50
1053.00
26
Surface area of the main permanent pool (square feet)
12655
20207
9503
11901
33583
27
Volume of the main permanent pool (cubic feet)
43781 cf
71750 cf
31708 cf
37315 cf
117199 cf
28
Average depth of the main pool (feet)
3.46 ft
3.55 ft
3.34 ft
3.14 ft
3.49 ft
29
Average depth equation used
Equation 2
Equation 2
Equation 2
Equation 2
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)
8174 cf
11047 cf
5799 cf
6468 cf
18462 cf
33
Is this 15-20% of the volume in the main pool?
Yes
Yes
Yes
Yes
Yes
34
Clean -out depth for forebay (inches)
48 in
48 in
48 in
48 in
48 in
35
Design volume of SCM (cu ft)
81084 cf
118822 cf
45481 cf
44076 cf
195063 cf
361
Is the outlet an orifice or a weir?
Orifice
Orifice
Orifice
Orifice
Orifice
37
If orifice, orifice diameter (inches)
2 in
3 in
2 in
2. in
3 in
38
If weir, weir height (inches)
39
If weir, weir length (inches)
40
Drawdown time for the temporary pool (days)
3.6
2.7
3.8
2.4
4.9
41
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
Yes
Yes
Yes
Yes
42
Are berms or baffles provided to improve the flow path?
Yes
Yes
Yes
Yes
Yes
43
Depth of forebay at entrance (inches)
48 in
48 in
48 in
48 in
48 in
44
Depth of forebay at exit (inches)
42 in
42 in
42 in
42 in
42 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
Yes
Yes
Yes
Yes
46
Width of the vegetated shelf (feet)
6 ft
6 ft
6 ft
6 ft
6 ft
47
Slope of vegetated shelf (H:V)
6:1
6:1
6:1
6:1
6:1
48
Does the orifice drawdown from below the top surface of the
permanentpool?
Yes
Yes
Yes
Yes
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-
r, 24-hr storm?
Yes
Yes
Yes
Yes
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MDC 9 is met.
No
No
No
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
Yes
Yes
Yes
Are the dam and embankment planted in non -clumping turf grass?
Yes
Yes
Yes
Yes
Yes
E54
Species of turf that will be used on the dam and embankment
Virginia Wild Rye
Virginia Wild Rye
Virginia Wild Rye
Virginia Wild Rye
Virginia Wild Rye
Hasa planting plan been provided for the vegetated shelf?
Yes
Yes
Yes
Yes
Yes
Wet Pond 3 2:25 PM 12/29/2021