SW6190508_Supplement EZ Form_20190806

SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMENT FORMS
PROJECT INFORMATION
1
Project Name
SOF Battalion Administration Facility
2
Project Area (ac)
9.55
3
Coastal Wetland Area (ac)
N/A
4
Surface Water Area (ac)
N/A
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)
N/A
8
Will the vegetated setback remain vegetated?
No
9
Is BLIA other that ns listed in 1003(4)(o d) out of the netbnnk?
Yes
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Bioretention Cell
4
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
17
Rainwater Harvesting (RWH)
0
18
Green koof
0
19
Level Spreader -Filter Strip (LS-FS)
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
IStormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
LOAD SUPPLEMENT FORMS
DESIGNER CERTIFICATION
27
Name and Title:
Robert L. Day, PE Principal
28
Organization:
Cyntergy
?R
Street address
810 S Cinninnati Second Floor
30
City, State, Zip.
Tulsa, OK 74119
31
Phone number(s):
918,877.6000
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.
IIIII1 00"
Seal
Signature of
t- 6(l
Date

BIORETENTION CELL
1
Drainage area number
1
2
3
4
2
Design volume of SCM (cu ft)
1748 cf
1544 cf
692 cf
1614 cf
GENERAL MDC FROM 02H.1050
3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
Yes
Yes
Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
Yes
Yes
5
What are the side slopes of the SCM (H:V)?
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
7
Are the inlets, outlets, and receiving stream protected from erosion (10-
year storm)?
Yes
Yes
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the design
volume?
Yes
Yes
Yes
Yes
9
10
What is the method for dewaterinq the SCM for maintenance?
If applicable, will the SCM be cleaned out after construction?
Other
Yes
Other
Yes
Other
Yes
Other
Yes
11
12
Does the maintenance access comply with General MDC (8)?
Does the drainage easement comply with General MDC (9)? y.0 rz.a.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
13
If the SCM Is on a single family lot, does (will?) the plat comply with
General MDC (10)?
Yes
Yes
Yes
Yes
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
es
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
es
Yes
16
Does the SCM follow the device specific MDC?
Yes
HE
es
Yes
17
as the M designed by an N licensed professional?
es
es
es
BIORETENTION
CELL MDC FROM 02H .1052
18
SHWT elevation (fmsl)
264.50
263.00
250.00
254.00
19
Bottom of the bioretention cell (fmsl)
261.60
260.15
261.75
259.75
20
Ponding depth of the design storm (inches)
gin
9 in
9 in
gin
21
Surface area of the bioretention cell (square feet)
4283 sf
2947 sf
2212 sf
3421 sf
22
Design volume of the bioretention cell (cubic feet)
3212 cf
2210 cf
1659 cf
2565 cf
23
Is the bioretention cell used for peak attenuation?
No
No
No
No
24
Depth of peak attenuation over planting surface (in)
in
in
in
in
25
Height of peak attenuation outlet above the planting surface (in)
in
in
in
in
26
Infiltration rate of the in situ soil (inch/hour)
0.003
0.003
0.003
0.003
27
Diameter of the underdrain pipes (if applicable)
8 in
6 in
8 in
6 in
28
Does the design include Internal Water Storage (IWS)?
Yes
Yes
Yes
Yes
29
if so, elevation of the top of the IWS (fmsl)
258.5
256.5
257.12
255.71
30
Elevation of the planting surface (fmsl)
261.6
261
262
260
31
What type of vegetation will be planted? (grass, trees/shrubs, other)?
Grass
Grass
Grass
Grass
32
Media depth (inches)
30 in
30 in
30 in
30 in
33
Percentage of medium to coarse washed sand by volume
85%
85%
85%
85%
34
Percentage of fines (silt and clay) by volume
10%
10%
10%
10%
35
rercentogo of organic matter by volume
5%
6%
9%
r,%
36
Type of organic material
Engineered Fill
Fame
same
came
37
Phosphorus Index (P-Index) of media (unitless)
10
10
10
10
38
Will compaction be avoided during construction?
Yes
Yes
Yes
Yes
39
Will cell be maintained to a one inch/hour standard?
Yes
Yes
Yes
Yes
40
41
Depth of mulch if applicable (inches)
Type of mulch, if applicable
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
42
1 How many clean out pipes are being installed?
4
1 2
1 2
4
43
IType of pretreatment that will be use
a Ii6e 44
bame
I bame
bame
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
44 bioretention cell(s):
43. Minimum 3' sod strip. All outlet headwalls to cell have rip -rap outlet protection
per NCDEQ requirements.
The project is located in Fort Bragg (North Carolina Army Installation). The soil
media will not be mechanically compacted. All bioretention areas will be sodded.
Mulch is not allowed by the user due to maintenance issues. The emergency
spillway Is designed for each cell to handle the entire flow from the I00-year storm
event in case of failure of the primary outfall and storage within each basin.
Bioretention 1 2:15 PM 7/1/2019

Discrete SCS Curve Number Method (NCDEQ Sormwater BMP Manual 3.3.2)
Location: Bioretention Area 1
Soil Group B
Predevelopment BUA
Area
0.07
acres
Area
2,981.83
sf
CN*
98
S
0.2
la
0.04
in
P
1
In
Q
0.79
in
V
196.3
cf
Predevelopment Open Area
Area
1.13
acres
Area
49,231.13
sf
CN*
60
S
6.67
la
1.33
in
P
1
in
Q
0.02
in
V
0
cf
Area I 1.20 acres
Total 1 196.30 cf
Date 07/03/2019
Developed BUA
Area
0.68
acres
Area
29,530.22
sf
CN*
98
S
0.2
la
0.04
in
P
1
in
0
0.79
in
V
1944.07
cf
Developed Open Area
Area
0.52
acres
Area
22,682.74
sf
CN*
69
S
4.49
la
0.9
in
P
1
in
Q
0
in
V
0
of
Area I 1.20 acres
Total I 1,944.07 cf
Storage Required
CIF 1,747.77
Surface Area
SF 4,283
Riser
IN 9
Storage Provided
CIF 3,212.3
Note: Runoff Depth for CN <= 60 set to 0.00 for 1.0" rainfall event.
* Composite CN calculated using Army LID Planning and Cost Tool
Developed by USACE Baltimore District and USACE ERDC

Discrete SCS Curve Number Method (NCDEQ Sormwater BMP Manual 3.3.2)
Location: Bioretention Area 2
Soil Group B
Predevelopment BUA
Area
0.00
acres
Area
0.00
sf
CN*
98
S
0.2
la
0.04
in
P ..
1
in .
Q
0.79
in
V
0
cf
Predevelopment Open Area
Area
0.78
acres
Area
33,986.00
sf
CN*
60
S
6.67
la
1.33
in
P
1
in
Q
0.02
in
V
0
Of
Area 1 0.78 acres
Total I 0.00 cf
Date 07/03/2019
Developed BUA
Area
0.54
acres
Area
23,450.00
sf
CN*
98
S
0.2
la
0.04
In
P
1
in
Q
0.79
in
V
1543.79
cf
Developed Open Area
Area
0.24
acres
Area
10,536.00
sf
CN*
69
S
4.49
la
0.9
in
P
1
in
Q
0
ffl
V
0
Area I 0.78 acres
Total 1 1,543.79 1 cf
Storage Required
CF
1,543.79
Surface Area
SF
2,947
Riser
IN
9
Storage Provided
CF
2,210.3
Note. Rurwff Depth fur CN <= 60 set to 0.00 fur 1.0" rainfall event.
* Composite CN calculated using Army LID Planning and Cost Tool
Developed by USACE Baltimore District and USACE ERDC

Discrete SCS Curve Number Method (NCDEQ Sormwater BMP Manual 3.3.2)
Location: Bioretention Area 3
Soil Group B
Predevelopment BUA
Area
0.07
acres
Area
2,981.83
sf
CN*
98
S
0.2
la
0.04
in
P
1
in
0.19
in
V
196.3
cf
Predevelopment Open Area
Area
0.53
acres
Area
23,053.12
sf
CN*
60
S
6.67
la
1.33
in
P
1
in
Q
0.02
in
V
0
of
Area 1 0.60 acres
Total 1 196.30 cf
Date 07/03/2019
Developed BUA
Area
0.31
acres
Area
13,486.31
sf
CN*
98
S
0.2
la
0.04
In
P
1
in
Q
0.79
In
V
887.85
cf
Developed Open Area
Area
0.29
acres
Area
12,548.64
sf
CN*
69
S
4.49
la
0.9
in
P
1
in
Q
0
in
V
0
of
Area I 0.60 acres
Total 1 887.851 cf
Storage Required
CIF 691.55
Surface Area
SF 2,212
Riser
IN 9
Storage Provided
CIF 1,659.0
Note. Rufiuff Depth fur CN <= 60 set to 0.00 fur 1.0" rainfall event
* Composite CN calculated using Army LID Planning and Cost Tool
Developed by USACE Baltimore District and USACE ERDC

Discrete SCS Curve Number Method (NCDEQ Sormwater BMP Manual 3.3.2)
Location: Bioretention Area 4
Soil Group B
Predevelopment BUA
Area
0.14
acres
Area
6,020.00
sf
CN*
98
S
0.2
la
0.04
In
P
1
ill
Q
0.79
in
V
396.32
cf
Predevelopment Open Area
Area
1.21
acres
Area
52,881.49
sf
CN*
60
S
6.67
la
1.33
in
P
1
in
Q
0.02
in
V
0
of
Area I 1.35 acres
Total 1 396.321 cf
Date 07/03/2019
Developed BUA
Area
0.70
acres
Area
30,533.77
sf
CN*
98
S
0.2
la
0.04
In
P
1
in
Q
0.79
in
V
2010.14
cf
Developed Open Area
Area
0.65
acres
Area
28,367.72
sf
CN*
69
S
4.49
la
0.9
in
P
1
in
Q
0
in
V
0
of
Area 1 1.35 acres
Total I 2,010.14 cf
Storage Required
CF
1,613.82
Surface Area
SF
3,421
Riser
IN
9
Storage Provided
CIF
2,565.8
Note: Runoff Depth for GN <= 60 set to 0.00 for 1.0" rainfall event.
* Composite CN calculated using Army LID Planning and Cost Tool
Developed by USACE Baltimore District and USACE ERDC