SW7111007_CURRENT PERMIT_20200330

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7z�z -%
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE[?
(�
YYYYMMDD

ROY. COOPER
Go v ern or
MICHAEL S. REGAN
Secretary
BRIAN WRENN
Acting Director
NORTH CAROLINA
Environmental Quality
March 30, 2020
Chowan University
Attention: Danny R. Davis, VP for Business Affairs
One University Place
Murfreesboro, NC 27855
Subject: Stormwater Permit No. SW7111007 Renewal
Chowan University Student Housing
High Density Stormwater Project
Hertford County
Dear Danny R. Davis:
The Washington Regional Office received a Stormwater Management Permit
Application for renewal of the subject permit on February 24, 2020. Staff review of the
application has determined that the permit can be reissued. We are forwarding Permit
No. SW7111007 dated March 30, 2020, for the continued operation of the subject
project.
This permit, upon its effective date, will replace all previous State Stormwater permits for
this project. This permit shall be effective from September 11, 2020 until September 10,
2028 and shall be subject to the conditions and limitations as specified therein, and does
not supercede any other agency permit that may be required. Please pay special attention
to the Operation and Maintenance requirements in this permit. Failure to establish an
adequate system for operation and maintenance of the stormwater management system
will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you
have the right to request an adjudicatory hearing upon written request within thirty (30)
days following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150E of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714.
Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact me at [phone].
Sincerely,
Roger K. Thorpe
Environmental Engineer
E *rk — North Carolina Department of £nvirax,merttai Quality � Division of "Energy. Mineral and Land Resmll'Ce5
�� `%Ia;hingtan Regional Office ' IM3'Nashington Square MaE ; Washington. North Carolina 27 SBn
osa�.va�m.muow� /"� 2SZ.)klih4S1

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Chowan University
Chowan University Student Housing
Located on Union Street in Murfreesboro, NC, Hertford County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and
the approved stormwater management plans and specifications and other supporting
data as attached and on file with and approved by the Division of Energy, Mineral, and
Land Resources (Division) and considered a part of this permit.
This permit shall be effective from September 11, 2020 until September 10, 2028, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 of this permit. The stormwater control has been
designed to handle the runoff from total of 269,469 square feet of impervious
area for Phase I and Phase II of the project.
3. The tract will be limited to the amount of built -upon area indicated in Section 1.7
of this permit, and per approved plans. Plans for any future built -upon area not
currently shown on the approved plans must be submitted and approved by the
Division prior to the start of construction.

4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements.
The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted
drainage area of this
project must be directed into the permitted stormwater
control system.
6. The built -upon areas associated with this project shall
be located at least 50 feet
landward of all perennial and intermittent surface waters.
7. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, ft2:
539,840
b. Total Impervious Surfaces, ft2:
269,469
C. Design Storm, inches:
1.5
d. Pond Depth - average, feet:
4.50
e. TSS removal efficiency:
90%
f. Permanent Pool Elevation, FMSL:
65.00
g. Permanent Pool Surface Area required, ft2:
21018
h. Permanent Pool Surface Area, ft2:
22,216
i. Min. Volume required, ft3:
33,689
j. Permitted Storage Volume, ft3:
38,044
k. Temporary Storage Elevation, FMSL:
66.60
I. Controlling Orifice:
2.50"0 pipe
M. Permitted Forebay Volume, ft3:
20,659
n. Receiving Stream/River Basin:
Hares Branch
o. Stream Index Number:
25-4-6
P. Classification of Water Body:
"C;NSW"
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all time provide the operation and maintenance necessary
to assure the permitted stormwater system functions at optimum efficiency. The
approved Operation and Maintenance Plan must be followed in its entirety and
maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and re -vegetation of slopes and the vegetated filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.

f. Debris removal and unclogging of outlet structure, orifice device, level
spreader, filter strip, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
5. The permittee shall submit to the Division an annual summary report of the
maintenance inspection records for each BMP. The report shall summarize the
inspection dates, results of the inspections, and the maintenance work performed
at each inspection.
6. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
7. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
9. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
10. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.

11. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
12. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
13. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a completed Name/Ownership Change form, to the Division, signed by
both parties, and accompanied by supporting documentation as listed on page 2
of the form. The project must be in good standing with the Division. The approval
of this request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The permittee grants DEQ Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated.
The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and re -issuance or
termination does not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.

9. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit
as allowed by the laws, rules and regulations contained in Title 15A NCAC
2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division of any name, ownership or mailing address
changes at least 30 days prior to making such changes.
12. This permit shall be effective from September 11, 2020 until September 10,
2028. Application for permit renewal shall be submitted 180 days prior to the
expiration date of this permit and must be accompanied by the processing fee.
Permit issued this the 30 th day of March 2020.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
Brian Wrenn, Acting Director
Division of Energy, Mineral, and Land Resources
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7111007

a
�DEMLR USE ONLY:.
Date Received
Fee Paid
Permit Number
ZP'
'!'GS r or/
I c0%
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER: 4. L441h
PERMIT RENEWAL APPLICATION FORM
In accordance with 15A NCAC 2H.1045(3). the current permit holder shall renow their high density permit 180 days
prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781)
Section 60.(c). This application form is for permit renewals only.
A. PROJECT INFORMATION
1. Stale Stormwater Permit Number: SW71 11007
2. Project name: Cowan University Student Housing I-1i h Density Stormwater Project
3. Project street address: Union Street 400 feet South of 1-lassel Drive
City: Murfreesboro County: Hertford ZIP: 1 27855
4. What, if any, changes have been made to the project as permitted? No
If the project has changed from the original approved plans, please complete SWU-101 fora Major
Modification or Minor Modification Application form available at:
htts:llde .nc. oviabout/divisions/ener -mineral-land-resourceslener -mineral-land-ruleststormwater- r
ogra mlpost-construction.
B. PERMITTEE INFORMATION
If changes to the permittee or project name have been made, please complete either the Permit Update form or
the Permit Transfer form available at:
htt sjlde .nc. ov/about/divisio s/ener -mineral-land-resourceslener-minera€-land-rulesistormwater- ro ra
m/post-construction. State Storm water Permits do not automatically transfer with the sale of the property.
1. Current Permit Holder's Company Name/Organization: Chowan University. _.
2. Signing Official's Name: R1%r` 2^Dabi '
3. Signing Official's Title: v C-v •� �� S'
4. Mailing Address: One University Place
City: Murfreesboro State: NC ZIP: 27855
5. Street Address: One University PI, cc
City: Murfreesboro State: NC ZIP : 27855
6. Phone: (. 252) 398-6250 Email: _ drdavis(a�chowan.edu
Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018

C. SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQ W/ORM. Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
X 1. A permit application processing fee of $505.00 payable to NCDEQ.
X 2. One original signed hard copy and one electronic copy of this completed form. The signing official
named on this application to represent the current permittee must meet one of the following:
a. Corporation — a principle executive officer of at least the level of vice-president;
b. Limited Liability Company (LLC) — a manager or company official as those terms are defined
in G.S. 57D "North Carolina Limited Liability Company Act;"
c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee;
d. Partnership or limited partnership — the general partner;
e. Sole proprietor; or
f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity.
3. One hard copy and one electronic copy of recorded documents required by the original permit that have
not yet been received by DEMLR, including: deed restrictions, protective covenants,
condominium/planned community declaration and easements. If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date.
X 4. O&M Agreements, Please select one:
have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep
this on file with the permit; or
I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a
copy be sent to me. I agree to keep this on file with the permit.
5. Designer Certifications, Please select one:
❑ A copy of the certification(s) confirming that the project was built in accordance with the
approved plans have been previously provided to the Division; or
❑ A copy of the certifications) confirming that the project was built in accordance with the
approved plans are enclosed; or
❑ The project has not yet been built.
6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permit.
7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide
one hard copy and one electronic copy of documentation from the NC Secretary of State, or other
official documentation, which supports the titles and positions held by the persons listed in Section
C.2 per 15A NCAC 2H. 1043(3)(b).
https://www.sosnc,govlon line serviceslsearch/b title/ Business Re istration
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018

D. PERMITTEE'S CERTIFICATION
a the person legally responsible for the permit, certify that I have a
copy of thel Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs
or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my
knowledge, c and complete. j
7�
Signature: Date: —/ f 4,'h�c'�
RIZATION:
a Notary Public for the State of
710"JIRE
u
„� �> _ County o do hereby certify
that D�1 N!J y', ��1Y I s personally appeared before me
this the ) S `l
day of
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Sea!)
Notary Signature:
My commission expires a.�
Brenda N Baisey
�•?t'rifOrti w�itnty. i�IG n�
My Commission Expires J. -...1 L1�,..
20 ZO , and acknowledge the due
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

WET DETENTION POND ANALYSIS - ALL RULES
FILE NAME: S:IWQSISTORMWATERIEXCELSPREADSHEETSIPOND1717007MOD
PROJECT #: SW7 111007MOD REVIEWER: Samir
Initial Run Date 0.00
PROJECT NAME: Chowan University 5udent Housing Last modified 04-Sep-12
Receiving Stream: Hares Branch
Drainage Basin: Chowan
Class: c, NSW
Within 112 mile sFN- Y or N
Index No. 15.00
Site Area 1 12.39 jacres
ODrainage Area 1 539840.00 square feet DA Area 12.39 lacres
Rules- "2008" or "Ph2" 1 2008
Buildings
square feet
1
Street
square feet
0.98
SW
square feet
0.95
Future
square feet
offsite
square feet
1
Other
269469.00 square feet
1
BUA at dill. DSm
square feet
TOTAL 269469.00 square feet
SURFACE AREA CALCULATION (with added DA and BUA at different design storm)
Overall % Impervious 49.92% SA/DA Ratio 3.89%
Average Design Depth 4.5 feet Req. SA 21018 Isf
TSS, 85 or 90: 90 % Prov. SA 22216 Isf
TEMPORARY POOL. AND FOREBAY VOLUME CALCULATIONS
Drainage AreaO
BUA
Post development Rv=
Old BUA Design Storm
Old BUA Design Volume
1.5" New BUA Design Storm Volume
1 yr. 24 hour precipitation depth (inches)
Predevelopment Rv value
1 yr. 24 hr. Pre -development volume
1 yr. 24 hr. Post -development volume
539840.00
sf
0.00 sf
#DIV10! unitless
inches
0
from NOAA chart
use 0,0e if no existing BUA
cubic feet
cubic feet
269469.00
0.499
33689
2.90
0.05
6523
65133
2008 Design Volume
1 33689 cubic feet
Phase 2 Design Volume
33689
Icubic feet
Required Volume
33689
cf
Area, sf Inc. volume
Acc. volume
Top of Sediment
58.00Imsi
msl ........
10005.00 0.00
0.00
Bottom of Shelf
64.50msl.........
19863.00 11640.00
11640,00
Permanent Pool
65.00msl.........
22216.00 25741.00
37381.00
Top of Shelf
65.50.........
25600.00 27962.00
65343.00
Temporary Pool
66.60
msl.........
27563.00 30241.00
95584.00
Volume met at elev
66.78
msl
FOREBAY
Vol. Prov. at TP
128160.00
cf
Perm. Pool Volume=
72876
Req. Forebay Volume=
14575
Provided Volume=
20659.00
Percent=
28.3%
Calculated Average D@Dth. feet
15.36
Max PUmD HP
r 114
user input rec
formula
ORIFICE CALCULATION
Average Head
Flow Q2, cfs
Flow Q5, cis
No. of Orifices
Diameter, inches
Drawdown =
1 yr 24 hr intensity, in/hr
Runoff Coefficient
1 yr 24 hr peak 0
Orifice flow<1yr24hr 1
feet
ds
cfs
or weir H x W
days
NOAA chart &
unitless
cfs
Q2 Area = 8.23
05 Area = 3.29
Orifice Area = 3.98
Av . Flow Q= 0.094
in x
'# of end contractions, N =
discharge coefficient, C
Effective weir length, L
sq. inches
sq. inches
sq. inches
ds
in
0.50
0.195
0.078
1
2.25
4.1
0.62
0.00
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ROY COOPER
Governor
MICHAEL S. REGAN
Se -my
BRIAN WR£NN
Acting Atrector
Dr. Kirk E. Peterson, President
Chowan University
One University Place
Murfreesboro, NC 27855
NORTH CAROLINA
EnvLnamentd Quality
February 10, 2020
Subject: Stormwater Permit No. SW7111007 Renewal
Chowan University Student Housing
High Density Stormwater Project
Hertford County
Dear Dr. Peterson:
A Division of Energy, Mineral, and Land Resources file review has determined that
Stormwater Permit SV 7111007 for a stormwater treatment system consisting of a wet
detention pond to serve Chowan University Student Housing located on Union Street in
Murfreesboro, NC expires on September 10, 2020. This is a reminder that permit
renewal applications are due 180 days prior to expiration. We do not have a record of
receiving a renewal application.
To keep this permit active please submit a completed permit renewal application along
with a $505.00 fee for permit renewal. Permit application forms for renewal can be found
on our website at:
hups: 1,/deq.nc.gavJ�bout/ "visio ,/energy-mineral-land-resources/energgy-mineral-lance
rules/stormwater-prQgram,Lpost-construction. North Carolina General Statutes and the
Coastal Stormwater rules require that this property be covered under a stormwater
permit.
If you have questions, please feel free to contact me at [phone]. 1 will be glad to
discuss this by phone or meet with you. If you would like, I can a -mail you a copy of the
application forms. You can request a copy by e-mailing me at rogpr.thorpe@ncdenr gu.
Sincerely,
Rog r K. Thorpe
Environmental Engineer
/�pp�{ �D+ �� orth Carolina Department of Environmental Quality I Division of Energy, Mineral And Land Resources
}p�{yyr Washington Regional Office 1 943 Washington Square Mall 1 Washington, North Carolina 27869
Wz9ow"a.ft 25Z946.6481

EXPRESS
Permit Number: J W -7 I j t{ UL7
O C T 24 2011 (to be p•oi4ded Pis b,1'Q)
Drainage Area Number:
NC DEW& Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMI' 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.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check once):
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check once):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on tile -
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— if the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element
Potential roblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximatelyapploximately six inches.
Form SW401-Wet Detention Basin O&M-Rev-4 Page 1 of 4

BMP element:
The inlet device: pipe or
Swale
The forebay
The vegetated shelf
The main treatment area
Permit Number:
(to he prof ded hr Dt11Q)
Drainage Area Number:
Potential problem:
The pipe is clogged
The pipe is cracked or
otherwise damaged.
Erosion is occurring in the
sti+ale.
Sediment has accumulated to
a depth greater than the
original design depth for
sediment storage.
Erosion has occurred.
Weeds are present.
Best professional practices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
dying.
Weeds are present.
Sediment has accumulated to
a depth greater than the
original design sediment
storage depth.
Algal growth covers over
50% of the area.
Cattails, phragmites or other
invasive plants cover 50% of
the basin surface.
How I will remediate the problem:
Unclog the pipe. Dispose of the
sediment off -site.
Replace the pipe.
Regrade the Swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future Eroblerns with erosion.
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the 13MP.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than s ra in .
Prune according to best professional
practices
Determine the source of the
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Consult a professional to remove
and control the algal growth.
Remove the plants by Wiping them
with pesticide (do not spray).
Form SW401-Wct Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided bY 1)6fQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem-.
The embankment
Shrubs have started to grow
Remove shrubs immediately,
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair, if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is darna ed
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth readhig and not readily penetrate into
accumulated sediments.
When the permanett pool depth reads 7 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 7 feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom Clevat
BASIN DIAGRAM
(Jill in the blank )
p Permanent Pool Elevation 65 f
58 Pe maven Pool
• - - - - - - - - - - - - - - - Volume Sediment Removal Elevation 58 � Volume
57 -ft Min.
---------------------------- ----- ------ --- ---
Sediment Bottom Elevation 57 � t-ft n.
Storage Sediment
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by D WQ)
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:Chowan University Student Housing
BMP drainage area number: 10.0 12 Acres
Print name:M. Christopher White
Title:President of Chowan University
Addr
Phon
Sigm
Date:
Note: The legally responsihle party should not he it homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
a Notary Public for the State of
ounty of 4 do hereby certify that
Ct' RI JgER � "tTE p rsonally appeared before me this
7 d
day of p--(icn� p r , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
SEAL
1 LL�
My commission expiresVO-,,-A
Form SW401-Wet Detention Basin 0&,M-Rev.4 Page 4 of 4

ae<--C)
l .
'bwQ tisri ONLY
Date Received
Fee Paid
Permit Number
q -- i -r
--a-
S Q
Applicable Rules:
{select (I!l that ripply)
❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph 11 - Post Construction
❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management flan
❑ Other WQ M rmt Plan: S'< ;4Ci` $
State of North Carolina
Department of Environment and Natural ResourceREC E I' E n
Division of Water Quality Y V
STORMWATER MANAGEMENT PERMIT APPLICATION FOM 14 2012
This forrrr gray be photocopied for rise as an original
I. GENERAL INFORMATION D
=�,-.W,
O
1. Project Name (subdivision, facility, or establishment name - should be consistent,a
specifications, letters, operation and maintenance agreements, etc.):
Chowan University Student Housing
2. Location of Project (street address):
Union Street (400 ft south of Hassell Drive
City: Murfreesboro County: Hertford %ip:27855
3. Directions to project (from nearest major intersection):
north from US 158 onto Union Street fSR 11
Site Is anoroximately 0.6 miles on the left.
4. Latitude:360 25' 50.71" N Longitude:-77° 05' 51.14" W of the main entrance to the project.
II. PERMIT INFORMATION:
'I. a. Specify whether project is (check one): ❑New ®Modification
b.If this application is being submitted as the result of a modification to an existing permit, list the existing
permit number SW7111007 , its issue date (if known)Nov. 17, 201E , and the status of
construction: ❑Not Started ®Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ❑I-ligh Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from DWQ
requesting a state stormwater management permit application, list the stormwater project number, if
assigned, and the previous name of the project, if different than currently
proposed,
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major ®Sedimentation/} rosion Control: 11.39 ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit: Proposed Impacts
b.lf any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
Form SWU-101 Version 07Jun2Ol0 Page 1 of 6

Sol A f R&

III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:Chowan University/ M. Christopher White
Signing Official & Title: President of Chowan University
b.Contact information for person listed in item 1a above:
Street Address:One University Place
City: Murfreesboro State:NC Zip:27855
Mailing Address (if 1apl7ficab1e):One University Place
City: Murfreesboro State:NC/_ip:27855
Phone: (252 ) 398-6250 Fax: ( }
Email:whitecOchowan.edu
c. Please check the appropriate box. The applicant listed above is:
®'The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below-, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official &'Title:
b.Contact information for person listed in item 2a above:
Street Add
City:
Mailing Address (if applicable):
Citv:
Phone:
Email:
State:
Zip:
State: Lip:
Fax:
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization:
Signing Official & Title:
b.Contact information for person listed in item 3a above:
Mailing Address:
City:
Phone: ( }
Email:
State: Zip:
Fax: l )
4. Local jurisdiction for building permits: Hertford County
Point of Contact: William Early Phone #: (252 ) 358-7801
Form SWU-101 Version 07Jun2010 Page 2 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
All stormwater runoff on -site will be gathered via drainage structures and directed into a_piping system. The
system will convey the stormwater to the site 13MP wet and and be treated before being discharged to the
Hare Branch Waterway.
2. a, If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW -1995 ❑ Ph I I - Post Construction
3. Stormwater runoff from this project drains to the Chowan River basin.
4. Total Property Area: 12.393 acres 5. Total Coastal Wetlands Area: acres
6. Total Surface Water Area: acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project
Area`:12.393 acres
Total project area shall he calculated to exclude thefollowing: the nornxrl pool of btr orn ded structures, the area
behVCen the bunks of streams and rivers, the area belrno the Norwal Higglr Water (NM line or Mean High Water
(MHW) line, and coastal uaellands lanrhoard from tiro NHW (or MHW) line. The resrillant project area is used to
calculate ozpertrll pen:er7t built upon area (B UA). Norr-coastal nlethands landznard of the NHW (or MFlM line may
he included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 49.9
9. How many drainage areas does the project have?1 (For high density, count 1 for each proposed engineered
storrwater BMP. For low density and other projects, use I for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information .,
Drainage Area T
Drainage Area _
Draina' e Area '
Draina `e Area
Receiving Stream Name
Hares Branch
Stream Class *
C-NSW
Stream Index Number *
25-4-6
Total Drainage Area (so
539,840
Iz , 3,1 ae
On -site Drainage Area (so
539,840
Off -site Drainage Area (sf)
-
Pro osed Impervious Area'(so
269,469
tb�
% Impervious Area** total
49.9
clin pervious..,_ Surface Area s i
Draina e Area1 '
Drainage Area
Draina e°Area,_
Drainage •Area''
On -site Buildings/ Lots (so
35,349
On -site Streets (sf)
37,760
On -site Parkin (so
136,011
On -site Sidewalks (so
35,725
Other on -site (so
-
Future (sf)
24,624
O.y"� o►o
Off -site (so
-
Existin BUA*** (so
-
Total (so:
269,469
6. A-
* Sireaar Class and lodes Number ran be deterntiued at: Jrtt�*;//piirlrrl.mxla�rtr.or rccs:b/mrl[hs/carr/c°lrrssilir:rrti��ats
Norm SWU-101 Version 07Jun2010 Page 3 of 6

* 1na xrnrious area is defined as the built rrpon area including, but not lintited to, buildings, roasts, parking arears,
siatavalks, gravel areas, etc.
***Report only that franount of existing BUA that will renwin after developrnent. Do riot report ally existing BLIA that
is to be rranoved and 717hiCh will be replaced by Hem BUA.
11. How was the off -site impervious area listed above determined? Provide documentation. N/ A
Proiects in Union County: Contact DiVC) Central Office sluff to sleek if the project is located tvithin a 77rreatenesl &
Endangered Species watershed that naayy he subject to nror•e stringent alorinivater reguirenrents as per NCAC 0211.0600.
0�11910Ua1101ZIONlMt•I19X01-4-3 C0][M►ifI
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BM P specified for this project. The latest versions of the forms can be downloaded
from http://portil.ncdenr.org/web/wq/ivs/su/btiip-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. A detailed application instruction sheet and BMP
checklists are available from http://�)orfial.nccienr.org/tiveb/wq/ws/su/statesw/for•r»s does. The complete
application package should be submitted to the appropriate DWQ Office. (The appropriate office may be
found by locating project on the interactive online map at httr�://t?ortal.ncilenr.orwet?f wqf wsf suf ma�?s.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from htt ): ?ortal.ncdenr.or gweb w w^s su statesw forms does.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form,
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part V11 below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreements) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.org/pages/onestopexpress.htmI for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within'/z mile of the site boundary, include the'/i
mile radius on the map.
7. Sealed, signed and dated calculations.
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/ Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f, Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the batiks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MI-IW or NI-IW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
Fonn SWU-101 Version 07Jun2O10 I'age 4 of 6

o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SFIWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"x 11" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration 13MPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedide a silt. visit for DWQ to 74e7fil the 514Wl' prior
to subnntillal, [phone])
10. A copy of the most current property deed. Deed book: 337 Page No: 214
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item In, 2a, and/or 3a per NCAC 21-1.1003(e). The
corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http: // www.secretary,state.nc.us/Corporations/CSearcli,asi2x
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
13UA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from
http://portal.ncdenr.org,/web/wq/ws/su/statesw/forms docs. Download the latest versions for each
submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DWQ and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer:David Castel
Consulting Firm: LandDesi n Inc.
Mailing Address:19 W Hargett Str�Suite 602
City:Raleigh State:NC Zip:27601
Phone: (919 ) 838-9331 Fax: (919 ) 800-3583
1?maiLd ;[e-mail]
IX. PROPERTY OWNER AUTHORIZATION (if Conlract Innfornnrationn, ilew 2 has been filed oast, c'otuylete this
secl ion)
1, (print or type mane of person listed in Contact lufornrtatioa, item 21a) , certify that I
own the property identified in this permit application, and thus give permission to (print or type, nnmut of person
listed in Contact Inafornuatioa, item 1aa) with (print or type nuaine of organizatiort listed in
Contact Inforntratiot, ilenu la) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form SWU-101 Version 07Jun2010 Page 5 of 6

As the legal property owner l acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to
me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a
completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment
facility without a valid permit. 1 understand that the operation of a stormwater treatment facility 4vithout a valid
permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including
the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
Signature: Date:
a Notary Public for the State of , County of
. do hereby certify that
before me this _ day of
personally appeared
, and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission expires
X. APPLICANT'S CERTIFICATION
I, (print or type naive of person listed in Contact [nforniation, itenr Ia) M. Christopher Mite
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that th4 proposed project complies with the requirements of the
applicable stormwater rules under �5A NCAC 2H .1 SL 2006-246 (Ph. 11 - Post Construction) or S1. 2008-211.
personally appeared
�n of the application for
Fonn SWU-101 Version 07Jun2010 Page 6 of 6

C A Ryp�i-nit No.
fro be provided by DINO)
�2��
16�i
L SEAL T
EXPRESS 032429 ;
ATA
Nov 14 201 , �-• F �:,-�; _C3 oG
NCDENR
`i. G�ra��
NCNC DE��,�I�MWATER MANAGEMENT PERMIT APPLICATION FIIH(K
401 CERTIFICATION APPLICATION FORM r
WET DETENTION BASIN SUPPLEMENT 11r�fl
I
This form must be filled out, printed and submitted.
The
Required Items Checklist (Part (11) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name
Chowan University Student Housing
Contact person
David Gastel
Phone number
704-333-0325
Date
111912011
Drainage area number
10.60 Acres
II. DESIGN INFORMATION
Site Characteristics
Drainage area
461,736 it'
Impervious area, post -development
277,042 g2 V .
% Impervious
60.00 %
Design rainfall depth
1.5 in 1/
Storage Volume: Non -SA Waters
Minimum volume required
34,053 rya OK
Volume provided
38,044 It'
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume
Pre-developmenl 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr €uncfl
Minimum volume required
Volume provided
Peale Flow Calculations
Is the prelpost control of the tyr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
Pre -development I y, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 10f1 vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanoul, bottom elevation
Sediment storage provided
Is there additional volume stored above fhe state -required temp. pool?
Elevalion of the top of the additional volume
it3
ft3
ll3
it
ft3
Y (Y or N)
2.9 in
0.25 (unitless)
0.70 (unitless)
0.12 inlhr OK
7.69 ft3fsec
21.52 it/sec
13.84 ft3lsec
66.60 fmsl
65,00 fmsl
65.40 fmsl
65.50 fmsl
64.50 imsl Data not needed for calculation option 41, but OK if provided.
58,00 fmsl
57.001msl Data not needed for calculation option k 1, but 4K if provided.
1.00 1t
N (Y or N)
fmsl
Form SW401-Wet Detention Basin-Rov.8,e117W Parts I. S It. Design Summary, Page 1 of 2

Permit No.
(10 be provided by DWO)
II, DESIGN INFORMATION
Surface Areas
Area, temporary pool
27,563 ftz
Area REQUIRED, permanent pool
22,163 it'
SAIDA ratio
4.80 (unitless)
Area PROVIDED, permanent pool, Am„ yD,
22,216 it
OK
Area, bottom of 10ft vegetated shelf, Aba ,hw
19,863 it'
Area, sediment cleanoul, top elevation (bottom of pond), Abd �Or,a
10,005 fl2
Volumes
Volume, temporary pool
38,044 f13
OK
Volume, permanent pool, VP*-
105,208 10
Wume, forebay (sum of lorebays if more than one forebay)
20,659 h3
Forebay % of permanent pool volume
19.6% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y (Y or N)
Mountain/Piedmont SA)DA Table Used?
N (Y or N)
SAIDA ratio
4.80 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Y (Y or N)
Votume, permanent pool, Vim„-, ,
105,208 if
Area provided, permanent pool, Ap,„ pw
22,216 h2
Average depth calculated
4.74 it
OK
Average depth used in SAIDA, d,,, (Round 10 nearest 0.511)
4.5 h
OK
Calculation option 2 used? (See Figure 10-2b)
N (Y or N)
Area provided, permanent pool, Ap,, ad
22,216 ft2
Area, bottom of 10it vegelaled shelf, At,, w,
19,863 h2
Area, sediment cleanoul, top elevation (bottom of pond), Aba,_P W
10,005 ft2
'Depth' (distance blw bottom of 1 Oft shelf and top of sediment)
6.50 it
Average depth calculated
it
Average depth used in SAIDA, d. (Round to nearest 0.5ft)
Drawdown Calculations
Drawdown through orifice?
Y (Y or N)
Diameter of orifice (if circular)
2.50 in
Area of orifice (if -non -circular)
in,
Coefficient of discharge (Cu)
0.60 (unitless)
Driving head (Hp)
1.50 h
Drawdown through weir?
N (Y or N)
Weir type
(unitless)
Coefficient of discharge (C,Y)
(unitless)
Length of weir (L)
it
Driving head (H)
it
Pre -development 1-yr, 24-hr peak flow
7.69 ft3lseC
Post-developmem 1-yr, 24-hr peak flow
21.52 ft3lsec
Storage volume discharge rate (through discharge orifice or weir)
0.12 ft3lsec
Storage volume drawdown time
4,13 days CK, draws down in 2.5 days.
Additional Information
Vegelaled side slopes
3 :1
OK
Vegetated shell slope
€0 :1
OK
Vegetated shelf width
10,0 it
OK
Length of flowpath to width ratio
4 :1
OK
Length to width ratio
2.4 A
OK
Trash rack for overflow & orifice?
Y (Y or N)
OK
Freeboard provided
1.0 h
OK
Vegetated filter provided?
N (Y or N)
OK
Recorded drainage easement provided?
Y (Y or N)
OK
Capures all runoff at ultimate build -out?
Y (Y or N)
OK
Drain mechanism for maintenance or emergencies is:
Hydraulic Pump/Emergency valve
Farm SW401-Wet Detention Basin-Rev.6-8117/09
Parts I. & 11. Design Summary, Pago 2 o12

Permit
(to be provided by DWO)
III. REQUIRED ITEMS 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.
Pagel Plan
Initials
Sheet No.
4r—
e' 6. n
1. Plans (1" 50' or larger) of the entire site showing:
CA[ CS
- Design at ultimate build -out,
Ba o K
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Basin dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
C 0
2 Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
G 6 • I
Outlet structure with trash rack or similar,
Maintenance access,
Permanent pool dimensions,
Forebay and main pond with Hardened emergency spillway,
Basin cross-section,
Vegetation specification for planting shelf, and
Filter strip.
CG . 0
3. Section view of the wet detention basin (1' = 29 or larger) showing:
C • G• 2
Side slopes, 3:1 or lower,
Pretreatment and treatment areas, and
Inlet and outlet structures.
�t
w
4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
4 4 C S
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
C 6.0
to verify volume provided.
C. 3. J
&. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
r1l Cr
7. The supporting calculations.
2�
r04
g. A copy of the signed and notarized operation and maintenance (O&M) agreement.
afv �t rr.s
9. A copy of the deed restrictions (it required).
Fa a Al
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
C'J 1. C f
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-
Rev.8-9117109 Part III. Required Items Checklist, Page 1 of 1