SW6140505_401 Certification Application_20140728

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NCDENR
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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION
APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
I. PROJECT INFORMATION
Project name
RTI Motor Pool Fort Bragg
Contact name
Smtt Leiter
Phone number
[phone]
Date
June 6, 2014
Drainage area number
NIA
II. DESIGN INFORMATION
The purpose of the LS-VFS
Buffer Rile: Difhise Flnw
Stomwiater enters LS-VFS from
A BMP
Type of VFS
Other. Explained below
Explanation of any "Other responses above
Engergy Dissipater
If Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
Re
Do not complete this section of the form.
Impervious surface area
Re
Do not complete this section of the form.
Percent impervious
%
Do not complete this section of the form.
Rational C coefficient
Do not complete this section of the torn.
Peak lbw from the 1 inlhr storm
cis
Do not complete this section of the form.
Time of concentration
min
Do not complete this section of the form.
Rainfall intensity, 10-yrstorm -
Whir
Do not complete this section of the forth.
Peak lbw from the 10-yr storm
ds
Do not complete this section of the forth.
Design storm
Other. Explained below
Maximum amount of flow directed to the LS-VFS
cis
Do not complete this section of the form.
Is a flow bypass system going to be used?
(Y or N)
Do not complete this section of the form.
Explanation of any'Otnef responses above
If Stormwater Esters the LS-VFS from a BMP
Type of BMP Other. Explained below
Peak discharge from the BMP during the design storm 0.02 cis
Peak discharge from the BMP during the 10-year storm 0,02 cis
Maximum capacity of a 100 foot long LS-VFS cfs
Peak Row directed to the LS-VFS 0.02 cis
Is a Row bypass system going to be used? N (Y or N)
Explanation of any "Other" responses above Dry detention basin
JUL 1 0 2014
Form SW401 - LS-VFS - 29June2012 - Rev.10page f of 3

LS•VFS Design
Forebay surface area
Depth of forebay al stonnwater entry point
Depth of forebay at stommvater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the char net (see diagram below):
M
B
W
y (flow depth for 10-year storm)
freeboard (during the 10-year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any 'Other' responses above
NIA
sq It
No fombay is required.
NIA
in
NIA
in
Too deep,
fticfs
ft
5
ft
Level spreader is too shod to handle the flow.
20
ft
Width of VFS is not adequate.
226.00
fmsl
225.00
fmsl
5.00
%
N
(Y or N)
OK
N
(Y or N)
(Y or N)
(Y or N)
it
it
it
0
it
fdsec
Pick one:
(Y or N)
(Y or N)
11
a S a
A
Form S W401 - LS-VFS - 29June2012 - Rev.10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the
following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been
met, attach justification.
Reburied Item:
1. Plans (1' - 50'ar larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
- High flow bypass system,
-Maintenar access,
Proposed drainage easement and public right of way (ROW), and
- Boundaries or drainage easement.
2. Plan details (1' = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
- High flow bypass system.
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build�out.
3. Section view of the level spreader (1' = 20' or larger) showing:
- Undendrain system (if applicable),
- Level lip,
-Upslope channel, and
- Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. Ra non -engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8, A copy of the signed and notarized operation and maintenance (08M) agreement.
Initials Page or plan sheet number and any notes:
—rQ._ C1.4,C1.5
U CIA.Ci.5
AL C1.6
Attached
sL 1.50
NIA
f� Attached
dL NIA
Form SW401 - LS-VFS - 29June2012 - Rev.10 page 3 of 3

Permit No.
(to be provided by DWD)
OF W ATFq
awnSTORMWATER MANAGEMENT PERMIT APPLICATION FORM s �
KDENR 401 CERTIFICATION APPLICATION FORM
DRY EXTENDED DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all the required information.
Project name
Contact person
Phone number
Date
Drainage area number
II. DESIGN INFORMATION
She Characteristics
Drainage area
Impervious area
% Impervious
Design rainfall depth
Peak Flow Calculations
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr. 24-hr storm
Pre -development 1-yr, 24-hr peak flow,
Past -development 1-yr, 24-hr peak flow
PrelPDst 1-yr, 24-hr peak control
Storage Volume: Non -SA Waters
Minimum required volume
Provided volume
Sediment storage volume provided
Storage Volume: SA Waters
1.5' runoff volume
Pre -development 1-yr, 24-hr runoff volume
Post -development 1-yr, 24-hr runoff volume
Minimum required volume
Provided volume
Sediment storage volume provided
Basin Design Parameters
Drawdown time
SNWT elevation
Basin bottom elevation
Storage elevation
Basin side slopes
Top elevation
Freeboard provided
Basin Bottom Dimenslons
Basin length
Basin width
Length to width ratio
Scott Leiter
[phone]
612712014
NIA
50,965.20 f?
35.302.00 -f?
0.69
1.00 in
s.u5
In
0.20
(unifless)
0.67
(uni1ess)
0.13
inlhr
0.03
ft'lsea
0.10
ft'/sec
0.07
8'/ser.
6,155.23 ft'
8.712.00 It'
1,742.00 ft'
It,
OK
Increase to at least 25%of volume provided
2.37
days
OK
223.00
first
226.00
fmsl
OK
228.50
hnsl
3.0
:1
OK
228.50
frost
OK
0.25
it
Need more freeboard, minimum of 1-ft required
93.46 It
34.87 It
2.68 :1 OK
Form SW401-Dry Extended Detention Basin-Rev.3 Pads I. & 11. Design Summary, Page 1 of 2

Permit
(to be Provided by DWQ)
Additional Information
Total runoff volume captured by basin
0.14
ac-in
Forebay is not required
Forebay provided
N
(Y or N)
Is basin in a recorded drainage easement?
N
(Y or N)
Need to a recorded drainage easement
Does basin capture all runoff at ultimate build -out?
Y
(Y or N)
OK
Is a sediment depth indicator included?
N
(Y or N)
A sediment depth indicator must be included.
Does the basin include a drain?
Y
(Y or N)
OK
Form SW401-Dry Extended Detention Basin-Rev.3 Parts I. B II. Design Summary, Page 2 of

Permit
Ill. REQUIRED ITEMS CHECKLIST
(to be provided by DWQ)
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials
Sheet No.
S _
C1.3, C1.5
1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out,
OH -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Basin dimensions,
Pretreatment system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
C1.3, C1.5
2. Plan details (1' = 30' or larger) for the bioretention cell showing:
- Basin dimensions
- Pretreatment system,
Maintenance access,
Outlet structure,
• Overflow device,
- Flow distribution detail for basin inflow, and
Vegetation specifications.
XL
C1.6
3. Section view of the basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
f
C1.5
6. A construction sequence that shows how the dry detention basin will be protected from sediment until the
entire drainage area is stabilized.
SL
Attached
7. The supporting calculations.
NIA
8. A copy of the signed and notarized operation and maintenance (08M) agreement.
V L
N/A
9. A copy of the deed restrictions (f required).
d L
Attached
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Dry Extended Detention Basin-Rev.7 Part III, Required Items Checklist, Page 1 of 1

Permit Number:
(to be provided by D WQ)
ewia roF wnrFgo
r
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with ail of the required information.
I. PROJECT INFORMATION
Project name Fort Bragg Regional Traning Institute: Training Motor Pool
Contact name Scott Leiter '
Phone number
Date
Drainage area number
II. DESIGN INFORMATION
Site Characteristics
[phone]
June 6, 2014
N/A
Drainage area
50,965.20 ft
Impervious area
35,302.00 ft'
Percent impervious
69.3% %
Design rainfall depth
4.80 inch
Peak Flow Calculations
10-yr storm runoff depth
4.80 in
10-yr storm intensity
0.20 in/hr
Post -development 10-yr storm peak Flow
0.25 ft3/sec
Velocity
Maximum non -erosive velocity (peak 10-year storm)
9.50 ft/sec
Soil characteristics (enter"it" below)
Sand/silt (easily erodible)
X
Clay mix (erosion resistant)
Grass Type (enter "x' below)
Bermuda
X
Tall fescue
X
Bahiagrass
Kentucky bluegrass
Grass -legume mixture
Swale type: Fill out one of the options below
Option 1: Curb Outlet Swale:
N
(Y or N)
Maximum velocity
NIA
Side slopes
N/A
:1
Swale length
N/A
It
Option 2: Swale Seeking Pollutant Credit ("For -Credit" Swale):
Y
(Y or N)
Maximum velocity for 10-yr storm
0.90
0/sec OK
Side slopes
5.00
:1 OK
Swale length
150.00
ft OK
Form SW401 Grassed Swale- Rev, 4 Parts I and H. Project Design Summary, Page 1 of 2

Permit
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y' in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
X
Width of the bottom of the Swale
0.00 ft
Width of the top of the swale
VARIES ft
Additional Information
Is the Swale sized for all runoff from ultimate build -out?
Y (Y or N)
OK
Is the SMP located in a proposed drainage easement with a
recorded access easement to a public Right of Way (ROW)?
N (Y or N)
Insufficient ROW location.
What is the distance from the bottom of the Swale to the SHWT?
1.33 ft
OK
What is the ground level elevation?
229.00 fmsl
What is the elevation of the bottom of the swale?
227.50 fmsl
What is the SHWT elevation?
226.17 fmsl
What is the longitudinal slope of the Swale?
0.30 %
OK
What is the depth of freeboard?
2.30 ft
OK
Form SW401-Grassed Swale -Rev a Pans I and II. Project Design Summary, Page 2 of 2

Permit No:
(to be assigned by OWQ)
Ill. REQUIRED IT EMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space
provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial
below. If a requirement has not been met, attach justification.
Initials Page/ Plan
Sheet No.
�[/ C1.3, C1.5 1. Plans (1" = 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Swale dimensions (width, length, depth),
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Grass species, and
- Boundaries of drainage easement.
C1.3, C1.5 2. Plan details (1" = 50' or larger) for the grassed swale showing:
- Swale dimensions (width, length, depth),
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Design at ultimate build -out,
- Grass species,
- Off -site drainage (if applicable),and
- Boundaries of drainage easement.
sL C1.6 3. Section view of the grassed swale (1" = 20' or larger) showing:
- Side slopes,
- Longitudinal slope,
- Freeboard
- Swale dimensions, and
- SHWT level(s)
$L Attached 4. Supporting calculations (including maximum velocity calculations for applicable storms)
S4 N/A 5. A copy of the signed and notarized operation and maintenance (0&M) agreement.
SL N/A 6. A copy of the deed restrictions (if required).
SW401-Grassed Swale-Rev.3 Part III, Page 1 of 1