Creek Valley Chase Low Density Supplement

Permit No.
(to. be provided by ;DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
LOW DENSITY SUPPLEMENT
This form may be photocopied for use as an original
A low density project is one that meets the appropriate criteria for built upon area and transports stormwater
runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater
collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can:be
found in Session Law 2008-211, 15A NCAC 2H .1000, Session Law 2006-246, and the DWQ BMP Manual.
Curb, and gutter systems are allowed, provided they meet the requirements in 15A NCAC 2H .1008(g).
I. PROJECT INFORMATION
Project Name : Creek Valley Chase Subdivision
Contact Person: Jeffrey A. Nobles, PE Phone Number: (910 ) 483-4300
Number of Lots:23 Allowable Built Upon Area (BUA) Per Lot*: 4840sf
Number of Dwelling Units Per Acre* *:0.35
Low Density Development (check one): ® without curb & gutter ❑ with. curb & gutter, outlets to (check one)':
® Swales ❑ Vegetated Area
*If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes.and allowable bui`t��p r'r'f4r,each lot:
The attachment must include the project name, phase, page numbers and provide area subtot• s a"be.
shown in units of square feet. FES
**(Phase II Post -Construction (non -SA) only) v - L
31459
II. BUILT UPON AREA ,�-a,Fa; �.
F '• GINE•
Refer to DWQ's forms and applications website for specific language that must be recordei�'�;��ZS�Ig
restrictions for all subdivided projects. (http://h2o.enr.state.ne.us/su/bmp_forms.htm)
Complete the following calculation in the space provided below where:
• SA Site Area - the total project area above Mean High Water.
DF Density Factor -the appropriate percent built upon area divided by 100.
• RA . Road Area - the total impervious surface occupied by roadways.
OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks; etc.
•. No. of Lots - the total number of lots in the subdivision.
• BUA per Lot, - the computed allowable built upon area for each lot including driveways and impervious
surfaces located between the front lot line and the edge of pavement.
r Total allowable lot BUA - the computed allowable built upon area. for all lots combined.
Total BUA from lot listing - the sum of built upon, area allocated for each lot on the list of°non-uniform;lot's,?
Form SW401-Low Density-Rev.3-2/10/09 Page 1 of 4

Calculation:
For uniform lot sizes:
(SA: ft2 x DF: ] — (RA: ft2) — (OA_: ft2) = BUA per Lot = ft2
(No of Lots: )
For non -uniform lot sizes:
a. (SA: ft2 x DF: ____) - (RA: ft2) — (OA: ft2) = Total allowable lot BUA = ft2
b. Total BUA from lot listing: sf, b must be < a
III. DESIGN INFORMATION
Complete the following table. If additional space is needed the information should be provided in the same
format as Table 1 and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State
of North Carolina Erosion and Sediment Control Planning and Design Manual or at
http://hdsc.nws.noaa.gov/hdsc/Pfds/
Table 1. Swale design information based on the 10-vear storm.
Swale No. Drainage
Area (ac)
Impervious
Area (ac)
Grassed
Area (ac)
C
Q
(cfs)
Slope
(%)
Vallow
(fps)
Vactual
(fps)
Flow
;;iD);e th (ft)
1
17.18
3.12
14.06
0.30
33.30
2.20
5.0
4.99
0.97
2
1.49
0.29
1.2
0.30
4
8.16
5.0
4.84
0.41
3
0.77
0.15
0.62
0.30
2.10
8.16
5.0
4.33
0.35
4
5
6
7
8
9
10
11
12
13
14
,. C
15
'
16
17
- 314
9
18
19
''.,,'' A.
20
Form SW401-Low Density-Rev.3-2/10/09 Page 2 of 4

IV. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A
NCAC 2H .1000, NCDENR BMP Manual (2007), Session Law 2006-246, and Session Law 2008-211.
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 that the following requirements
have been met and supporting documentation is provided as necessary. If the applicant has designated an agent
on the Stormwater Management Permit Application Form, the agent may initial below. If any item is not met,
then justification must be attached. Only complete items n through p for projects with curb outlets.
Page/Plan
Initials. Sheet No.
n/a a. t For projects in the 20 coastal counties: Per NCAC 2H.1005, a 50 foot wide vegetative buffer is
provided adjacent to surface waters. For Redevelopment projects, a 30' wide vegetative
buffer adjacent surface waters is provided.
n/a b. f For HQW or ORW projects outside the 20 coastal counties: A 30 foot wide vegetative buffer is
provided adjacent to surface waters.
n/a c. f For Phase II Post -Construction projects: All built upon area is located at least 30 feet,landward of
all perennial and intermittent surface waters.
n/a d. Deed restriction language as required on form S WU-101 shall be recorded' as a restrictive
covenant. A copy of the recorded document shall be provided to DWQ within 30 days of
platting and prior to the sale of any lots.
n/a e. Built uponarea calculations are provided for the overall project and all lots.
n/a f. Project conforms to low density requirements within the ORW AEC. (if applicable per
15A NCAC 2H .1007)
C10-12 . g. Side slopes of swales are no steeper than 3:1; or no steeper than 5:1 for curb outlet swales.
GPM C06 h. Longitudinal slope of swales is no greater than 5%; for non -curb outlet projects, calculations for
shear stress and velocity are provided if slope is greater than 5%.
n/a i. At a minimum, swales are designed to carry the 10 year storm velocity at a non -erosive rate.
n/a j. Swales discharging to wetlands are designed to flow into and through the wetlands at anon-
erosive velocity (for this flow requirement into wetlands, non -erosive is velocity < 2 ft/s).
'PJ2L�N - C10-12 k. Swale detail and permanent vegetation is specified on the plans.
?Qb_J\ C10-12 .1. Swale detail provided on plans; includes grass type(s) for permanent vegetative cover.
OM C04 m. Swales are located in recorded drainage easements.
C04 n.ff Length of swale' or vegetated area i$ at least 100 feet for each curb outlet.
'?OM C04 o:ft The system takes into account the run-off at ultimate built -out potential ftom all surfaces
draining to the system (delineate drainage area for each swale).
1 P& p.ft Curb outlets direct flow to a swale or vegetated area.
t Projects in the Neuse, Tar -Pamlico, Catawba River basins, and Randleman Lake may require additional buffers.
tt Only complete these items for projects with curb outlets.
Form SW401-Low Density-Rev.3-2/10/09 Page 3 of 4

V. SWALE SYSTEM MAINTENANCE REQUIREMENTS
Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches,
at anytime; and grass will not be mowed too close to the ground or "scalped".
2. Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up,
erosion, and trash accumulation.
Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded
following sediment removal.
4. Eroded areas of the swales will be repaired and reseeded. Swales will be revegetated as needed and in a
timely manner based on the monthly inspections. Side slopes must be maintained at the permitted slope.
5. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every
significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts,
velocity reduction devices and piping.
6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality.
I acknowledge and agree by my signature below that I am responsible for the performance of the six
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print Name and Title:Benjamin A Stout -Registered Agent BSNJ Land LLC
Address: P.O. Box 53798, Fayetteville NC, 28305
Phone: G 1 U `" R C)y I Date: c z( m l t$
Signature:
Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I', , a Notary Public for the S to of , County of
do hereby certify that f . _ personally appeared before -me thisPw
i �h
day of �Q�Q�QJA-1 , ZI and acknow edgOthe due execution of the forgoing swale maintenance requirements.
Witness my hand and official seal,
IMFIVAIWATWU
1 WIWI. Ojoi
« Nrtary Public
��'lS>✓AL�Ympson Epler
nc; county
5ercn Carolina .
My commission expires (- '
Form SW401-Low Density-Rev.3-2/1,0/09 Page 4 of 4

Permit Name:
(to be provided by DWQ)
Drainage Area Number:
Grassed. Swale Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept m' a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area of the grassed swale will be carefully managed to reduce the
sediment load to the grassed swale.
— After the first-time fertilization to establish the grass in the swale, fertilizer will
not be applied to the grassed swale.
The grassed swale will be inspected once a quarter. Records of operation and
maintenance will be kept in a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire length of the
Trash/debris is present.
Remove the trash/debris.
swale
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then re -sod
(or plant with other appropriate
species) and water until established.
Provide lime and a one
fertilizer application.
Sediment covers the grass at
Remove sediment and dispose in an
the bottom of the swale.
area that will not impact streams or
BMPs. Re -sod if necessary.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
The receiving water
'Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Over§ight Unit at 919-
outlet.
733-1786.
4
Form SW401-Grassed Swale O&M-Rev.3
Page l 1of 2

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system. or responsible party.
Project name:Creek Valley Chase Subdivision
BMP drainage area number:
Print name:Benjamin A. Stout
Title:Registered Agent
Address:Ao°► G�Q0Fayetteville NC 28304o
Phone: q10 - -+-q 9 - (-) C) I CA
Signature: T- V'L
T
Date: (6
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
.1, i j , a Notary Public for the State of
County of dohereby certify that
6M lyrt.M d m .. TAc! 17 personally appeared before me this _kak
day of U Lwh b ,t�D (2), and acknowledge the due execution of the
forgoing grassed swale maintenance requirements. Witness my hand and official seal,
ctary Public kkt-
�~�
Lori sinp,san Epler
Cumberland County
North Carolina
SEAL
My commission expires ( t - ( °-t
RECEIVED
JAN 2 8 2019
DENR-LAND QUALITY
5TORMWATER PERMITTING
Form SW401-Grassed Swale O&M-Rev.3 Page 2 of 2

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rev-Ditch-1
Channel Calculator
Ditch-1
Given Input Data:
Shape...........................
Solvingfor .....................
Flowrate........................
Slope...........................
Manning's n .....................
Height ..........................
Bottom width ....................
Leftslope ......................
Right slope .....................
Computed Results:
Depth...........................
Velocity ........................
Full Flowrate ...................
Flowarea .......................
Flowperimeter ..................
Hydraulic radius ................
Top width .......................
Area ............................
Perimeter.......................
Percentfull ....................
Critical Information
Critical depth ..................
Critical slope ..................
Critical velocity ...............
Critical area ...................
Critical perimeter ..............
Critical hydraulic radius .......
Critical top width ..............
Specific energy .................
Minimumenergy ..................
Froudenumber ...................
Flow condition ..................
Trapezoidal
Depth of Flow
33.3000 cfs
0.0220 ft/ft
0.0300
1.5000 ft
2.0000 ft
0.2000 ft/ft (V/H)
0.2000 ft/ft (V/H)
0.9723 ft
4.9910 fps
92.0066 cfs
6.67 ft2
11.9160 ft
0.5599 ft
11.7234 ft
14.25 ft2
17.2971 ft
64.8230
1.0443 ft
0.0158 ft/ft
4.4158 fps
7.54 ft2
12.6495 ft
0.5962 ft
12.4427 ft
1.3595 ft
1.5664 ft
1.1664
Supercritical
Page 1
SEAL
31459
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