HomeMy WebLinkAboutSW6070703_CURRENT PERMIT_20070911STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD
I
Michael F. Easley, Governor
William G. Ross R., Secretary
North Carolina Department of rnwomnent and Natural Resources
y
Coleco li. Sullins, Director
Division of Water Quality
September 11, 2007
Benjamin B. Slaughter
PO Box 785
Fuquay-Varina, NC 27526
Subject: Storn»vater Management Permit SW6070703
McCullers Relo Facility
High Density Project
Harnett Countv
Dear Mr. Slaughter
The Fayetteville Regional Office of the Division of Water Quality received a Stormwater
Management Permit Application for the McCullers Relo Facility project on July 30, 2007. Staff review
of the plans and specifications and additional information received August 28, 2007 and September 5,
2007 has determined that the project, as proposed, will comply with the Stormwater Regulations set
forth in Title 15A NCAC 21-I .1000. Accordingly, we are forwarding herewith Stormwater Management
Permit S W6070703, dated September I I. 2007, for the construction, operation and maintenance of
stormwater treatment facilities associated with the subject project.
This permit shall be effective from the date of issuance until September 10, 2017, and shall be
subject to the conditions and limitations as specified therein. 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 stonnwater management system will result in future compliance
problems.
If any parts, requirements, of limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) calendar days following
receipt of this permit. ']'his request must be in the form of a written petition, conforming to Chapter
150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O.
Drawer 27447, Raleigh, NC 27611-7447. 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
Mike Lawyer or myself at (910) 433-3300,
Sincerely,
d, Cl�riCtF-J J T�vL1lY1:
Belinda S. Henson
Regional Supervisor
Surface Water Protection Section
BS11: MUmI
cc: John A. K. Tucker, PE
Harnett County Planning & Inspections
FRO -Surface Water Protection
Water Quality Central Files
NoiihCarolina
Naturally
North Carolina Division of Water Quality 225 Green Street -Suite 714 Fayetteville, NC 28301 Phone (910) 433-3300 Customer Service
Internee www.nevateraualitv.or, Fax (910)486-0707 1-877-623-6748
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STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONNIENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORININVATER MANAGEMENT PERMIT
UIGH 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
Benjamin B. Slaughter
AkGullers Relo Facility
Harnett County
FOR THE
construction, operation and maintenance of three (3) wet detention ponds in compliance with the
Provisions of 15A NCAC 211 .1000 (hereal er 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 Water Quality and considered a part of this permit.
This permit shall be effective from the date 6f issuance until September 10, 2017, and shall be subject to
the following specified conditions and limitations:
L DESIGN STANDARDS
I. This permit is effective only with respect to the nature and volume of stormwater described in
the application and other supporting data.
2. The stormwater systems have beenapproved for the management of stonnwater runoff as
described in Section 1.5 of this peririt. The stonnwater controls have been designed to handle the
runoff from 2,529,529 square feet of impervious area.
3. All stomiwater collection and treatment systems must be located in either dedicated common
areas or recorded easements. The filial plats for the project will be recorded showing all such
required easements, in accordance with the approved plans.
4 The runoff from all built -upon area within the permitted drainage area of this project must be
directed into the permitted stormwater control systems.
5. The following design criteria have been provided in the wet detention ponds and must be
maintained at design condition:
Basin One-
a. Drainage Area, acres: 39.1
Onsite1 ft�: 1,703,196
OffsiteI ft2: N/A
b. Total Impervious Surfaces, ft': 343,757
i C.
Design Storm, inches:
1
d.
Pond Depth, feet:
4
e.
TSS removal efficiency:
85%
f.
Permanent Pool Elevation, FMSL:
286
g.
Permanent Pool Surface Area, W:
42,491
h.
Permitted Storage Volume, W:
85,630
i.
Temporary Storage 131evatio'n, FMSL:
287.9
j.
Controlling Orifice:
4"0 pipe
k.
Permanent Pool Volume, f1':
134,244
1.
Permitted Forebay VOIUme, If3:
26,966
M.
Receiving Stream/River Basin:
Hector Creek / Cape Fear
n.
Stream Index Number:
18-15-(0.7)
0.
Classification of Water Body:
"WS-IV;HQW"
Basin
Two:
a.
Drainage Area, acres:
21.3
Onsite, f 2:
927,828
0ffsite, fe:
N/A
b.
Total Impervious Surfaces, ft":
749,232
C.
Design Storm, inches:
I
d.
Pond Depth, feet.
6
C.
TSS removal efficiency:
85%
f.
Permanent Pool Elevation, FN4SL:
286
g.
Permanent Pool Surface Area, fe:
28,722
h.
Permitted Storage Volume, ft':
60,767
1.
Temporary Storage Elevatiiiii, FMSL:
288
j.
Controlling Orifice:
2.5"0 pipe
k.
Pernianent Pool Volume, fC':
90,753
1.
Permitted Forebay Volume, 1,13:
24,784
In.
Receiving Strearn/River Basin-
Hector Creek / Cape Fear
n.
Stream Index Number:
18-15-(0 7)
0.
Classification of Water Body:
"WS-IV;HQW"
Basin Three:
a.
Drainage Area, acres:
37.8
Onsite1 ft'`:
1,646,568
Offsite, ftl:
N/A
b.
Total Impervious Surfaces, 11"
936,540
C.
Design Storm, inches:
1
d.
Pond Depth, feet:
6
e.
TSS removal efficiency:
85°/�
1'.
Permanent Pool Elevation. l,NISL:
292
g.
Permanent Pool Surface Area; ft2:
39,245
h.
Permitted Storage Volume, IV:
80,690
i.
Temporary Storage Elevation, FNISL:
294
j.
Controlling Orifice:
3 "O pipe
k.
Permanent Pool Volume, ft':
114,803
I.
Permitted Forebay Volume;,, ftl:
24,967
In.
Receiving Sneam/River Basin:
Hector Creek / Cape Fear
it.
Stream Index Number:
18-I5-(0.7)
o.
Classification of Water Body:
"WS-IV,HQW"
11. SCHEDULE OF COMPLIANCE
The stormwater management systems shall be constructed in their entirety, vegetated and
operational for their 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 pennittee shall, at all times, provide the operation and maintenance necessary to assure the
permitted stormwater systems function at optimum efficiency. The approved Operation and
Maintenance Plan must be follower in its entirety and maintenance must occur at the scheduled
intervals including, but not limited to:
a. Semi-annual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
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, flow spreader, catch
basins and piping.
g. Access to the outlet structu?c must be available at all times.
Records of maintenance activities must be kept and made available upon request to authorized
personnel of DWQ. The records will indicate the date, activity, name of person performing the
work and what actions were taken,
5. Decorative spray fountains will be allowed in the stormwater treatment system, subject to the
following criteria:
a. The fountain must draw its water from less than 2' below the permanent pool surface.
b. Separated units, where tubinc, connects the nozzle, pump and intake, may be used only, if
they draw water from the surface in the deepest part of the pond.
c. The falling water from lire fountain must be centered in the pond, away from the
shoreline.
d. The maximum horsepower for a fountain in Basin One is 1 /2 horsepower, Basin Two is
1 /3 horsepower and Basin Three is 1 /3 horsepower.
6. The facilities shall be constructed as shown on the approved plans. This permit shall become
voidable unless the facilities are constructed in accordance with the conditions of this permit, the
approved plans and specifications, and other supporting data.
Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to
operation of this pennitted 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.
8. 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.
9. Access to the stormwater facilities shall be maintained via appropriate easements at all times.
10. The pennittee 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:
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.
C. 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 permitter, for which Erosion and
Sedimentation Control Plait approval or a LAMA Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
1 ]. The permittee shall submit final site layout and grading plans for any permitted future areas
shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by the Permittee for
a minimum of ten years from the date of the completion of construction.
13. The Director may notify the permit -I& 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 pennittee
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.
Ill. CPNERAL 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 permitter must submit a formal permit transfer
request to the Division of Water Quality, accompanied by a completed name/ownership change
form, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may not be
approved. The permittee is responsible for compliance ),with all permit conditions until such time
as the Division approves the transfer request.
Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
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) havingjurisdiction.
4. 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.
5. The permittee grants DENR Staff permission to enter the property, during normal business hours
for the purpose of inspecting all components of the permitted stormwater management facility,
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a
request for a permit modification, revocation and reissuance or termination does not stay any
permit condition.
Unless specified elsewhere, permanent seeding requirements for the stormwater control must
follow the guidelines established iii the North Carolina Erosion and Sediment Control Planning
and Design Manual.
Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit_
The permittee shall notify the Division with any name, ownership or mailing address changes
within 30 calendar days.
Permit issued this the eleventh day of September 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Ale H. Sullms, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit SVV6070703
McCullers Relo Facility Page l of')
Stormwater Management Permit SW6070703
Harnett County
Designer's Certification
I, as a duly registered in the State of
North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of
the project,
(Project)
for _ (Project Owner) hereby state that, to the best of my
abilities, due care and diligence was used in the observation of the project construction such that the
construction was observed to be built within substantial compliance and intent of the approved plans and
specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and §pecification:
SEAL
Signature
Registration Number ......
Date
Certification Requirements: Page 2 of 2
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the stem contains no more than the permitted amount of built -
upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains to
the system.
4. All roof drains are located sueh that the runoff is directed into the system
5. The outlet/bypass structure; elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
& All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-circuiting of the
system.
11. The permitted amounts of 'surface area and/or volume have been provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, forebay and
vegetative filter.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
7- 30-off
` 03
tE6d')oiO3
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as art original
I c 1
L GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): IJI V1f
Benjamin B Slaughter
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Benjamin B. Slaughter
3. Mailing Address for person listed in item 2 above:
PO Box 785
City: Fuquay Varina State: NC Zip: 27526
Telephone Number: ( 919 ) 669-2700
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
McCullers Relo Facility
5. Location of Project (street address):
US 401 North
County: Harnett County
6. Directions to project (from nearest major intersection):
From intersetion of US 401/421& NC 210 in Lillington proceed 7.6 miles north on US 401. Project is on the
west side of US 401
7. Latitude: 35-30-51 Longitude: -78-48-04
8. Contact person who can answer questions about the project:
John Tucker
it. PERMIT INFORMATION:
1. Specify whether project is (check one):
Telephone Number: ( 919
x New Renewal
Form SWIJ-101 Version 3.99 Page I of
of project
5670483
Modification
2� If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density x High Density Redevelop _General Permit _Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major x Sedimentation/Erosion Control _404/401 Permit x NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
First inch of stormwater will be collected in main intersecptor pipes and directed to 3 wet detention ponds.
2. Stormwater runoff from this project drains to the
Cape Fear
River basin.
3. Total Project Area: 96 acres
4.
Project Built Upon Area: 61 %
5. How many drainage areas does the project have? 3
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin 1
Basin 2
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
Tributary to Hectors Creek
Tributary to Hectors Creek
Receiving Stream Class
C'HQ
C:HQ
Drainage Area
39.10
21.30 ac
Existing Impervious* Area
0 ac
0
Proposed Impervious*Area
21.50 ac
17.20 ac
% Impervious# Area (total)
53
81
Impervious* Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings
NA
NA
On -site Streets
NA
NA
On -site Parking
21.50
17.20
On -site Sidewalks
NA
NA
Other on -site
NA
NA
Off -site
Total: 21.50 ac
Total: 17.20
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas.
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4
Basin 3
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
Trihuta[y to Hectors Greek
Receiving Stream Class
C;HQ
Drainage Area
37.80
Existing Impervious" Area
0 ac
Proposed Impervious`Area
21.50 ac
% Impervious* Area (total)
56
Impervious' Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings
NA
On -site Streets
NA
On -site Parking
21.50
On -site Sidewalks
NA
Other on -site
NA
Off -site
Total: 21.50 ac
Total:
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
7. How was the off -site impervious area listed above derived? Review of aerial photograhpy (2005) and
site recon.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, 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 State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of
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. The complete application package should be
submitted to the appropriate DWQ Regional Office.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form 'ram - _
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• fual-
Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VIL AGENT AUTHORIZATION
If you wish to designate authority to another Individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): John A.K. Tucker
Mailing Address: PO Box 297
City Fuquay Varina State: NC Zip: 27526
Phone: ( 919 ) 5670483 Fax: ( 919 ) 5673611
Vill. APPLICANT'S CERTIFICATION
I, (print or type name ofperson listed in General Information. item 2)
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 t proposed project complies with the requirements of 15A
NCAC 2H .1000. If .
Date: 7A f 0!
Form SVAJ-101 Version 3.99 Page 4 of
t;
Permit No. S"676 7a 3
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
1. PROJECT INFORMATION
Project Name: McCullers Relo
Contact Person: John Tucker
Phone Number: ( 919 ) 567 0483
For projects with multiple basins, specify which basin this worksheet applies to: Basin 1
elevations
Basin Bottom Elevation 282.00 ft.
Permanent Pool Elevation 286.00 ft.
Temporary Pool Elevation 287.90 fr.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 42,491 sq. ft. (water surface area at the orifice elevation)
Drainage Area 39.10 ac. (on -site and off site drainage to the basin)
Impervious Area 2120 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 134,244 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 80,879 cu. ft. (volume detained above the permanent pool)
Forebay Volume 26,966 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1 1.92 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 12 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1 in.
Design TSS Removal 2 85 % (minimum 85%required)
Form SWU-102 Rev 3.99 Page I of 4
Footnotes:
1 When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 211.1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
ye. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
/L i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
A/14 I. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
_ar in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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 one) edoes 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3.00
When the permanent pool depth reads 3.00
Sediment Re oval El. 283.00
Bottom Eleanon 282.00
FOREBAY
feet in the main pond, the sediment shall be removed.
feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blankv)
Permanent Pool Elevation 286.00
Sediment Removal Elevation 283.00 47 0°-
Bottom Elevation 282.00 25%
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of
7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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: Benjamin B.
Address: PO Box 785 Fuquay Varina, NC 27526
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, Pac'( (+k 7Qar'ce, <JC-e ar a Notary Public for the State of lybrH- Cpr�J;na ,
County of JAja4b— do hereby certify that (Yn tm 6.
personally appeared before me this cZs day of Jt, Sj Z00'I , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
/ yeARCF \
j NOTARy o
z
G. '01JB0'J
�,.yt O,
COUN`'/
SEAL
My commission expires ! 0'.2 (fl_ zoo,)
Form S WU-102 Rev 3.99 Page 4 of 4
� f
� N
�.-
.�
:(l.
Permit No. 514-126.2 63
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name:
Contact Person
McCullers Relo
John Tucker
Phone Number: (919 ) 5670483
For projects with multiple basins, specify which basin this worksheet applies to: Basin 2
elevations
Basin Bottom Elevation 280.00 ft.
Permanent Pool Elevation 286.00 ft.
Temporary Pool Elevation 288.00 ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 28,722 sq. ft. (water surface area at the orifice elevation)
Drainage Area 21.3 ac. (on -site and off -site drainage to the basin)
Impervious Area 17.20 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 90,753 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 60,767 cu. ft. (volume detained above the permanent pooh
Forebay Volume 24,784 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAI 2.39 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 12 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page I of 4
Footnotes:
When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90% TSS removal.
Ill. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 21-1 .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
T c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
9 c. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
ipy h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
4 j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
-fir m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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 one) 6 d s 0 does not incorporate a vegetated filter at the outlet.
This system (check one) s 0 does not incorporate pretreatment other than a forebay.
Form S WU-102 Rev 3.99 Page 2 of 4
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 4.50 feet in the forebay, the sediment shall be removed.
Sediment Rcn oval El. 281.50
--------------
Bottom Elc ation 2B0.00
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 286.00
Sediment Removal Elevation 281 _50
-
Bottom Elevation 280.00
MAIN POND
175%
-- -25%
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of4
7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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: Benjamin B. Slaughter
Title: Owner
Address: PO Box 785 Fuquay Varina, NC 27526
Date: o
Note: The legally responsible party should not be a homeowners association unless more than 5,0% of the lots have been sold and a
resident of the subdivision has been named the president.
1, PaLdef+c Pearce. Ja6f�V'n' , a Notary Public for the State of Noy^'q-t C¢ra u/wk ,
County of _ wa kc -,do hereby certify that drpp arn;-n 6. S�acwl„te.�
personally appeared before me this a` day of fjr(tI _too 1 and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
PEAROF\\
dv NOT AFi'y 9�
� A(/BLIG 2
\cout4v'"
SEAL
My commission expires lid• 3Lfo - -)-ODq
Form SWU-102 Rev 3.99 Page 4 of 4
Penn it No. 5' 16o'%o 70 3
(to he provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be. photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: McCullers Relo Facility
Contact Person: John Tucker Phone Number: ( 919 ) 567 0483
For projects with multiple basins, specify which basin this worksheet applies to: Basin 3
elevations
Basin Bottom Elevation 286.00 ft.
Permanent Pool Elevation 292.00 ft.
Temporary Pool Elevation 293.85 ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure ovetflow)
areas
Permanent Pool Surface Area 39,245 sq. ft. (water surface area at the orifice elevation)
Drainage Area 37.80 ac. (on -site and off -site drainage to the basin)
Impervious Area 21.50 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA I
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
114,803 cu. ft. (combined volume of main basin and forebay)
80,690 cu. ft. (volume detained above the permanent pool)
24,967 cu. ft. (approximately 200% of total volume)
1.58 (surface area to drainage area ratio from DWQ table)
12 in. (2 to 5 day temporary pool draw -down required)
1 in.
85 % (minimum 85%required)
Form SWU-102 Rev 3.99 Page I of 4
Footnotes:
When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative fitter may be waived if the wet detention basin is designed to provide
90%TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal.
11. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 21-1 .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
c. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
It. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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 one) 9fdoes 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 94oes 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
1 Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 450
When the permanent pool depth reads 4.50
feet in the main pond, the sediment shall be removed.
feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 292
Sediment Re oval El. 287.50 175 °
__________♦__ Sediment Removal Elevation 28750
Bottom Elc ation 286.00 % "----------------------------------
Bottom Elevation 286.00
FOREBAY MAIN POND
75%
25%
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 ol'4
All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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: Benjamin B. Slaughter
Address: PO Box 785 Fuquay Varina, NC 27526
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, rai-jcf e r eay e— jr-,dCSoo , a Notary Public for the State of / oYA Qa it
County of jb�(L� t° do hereby certify that 46P-'l�OM .Ix 6- 51aVA$ h 4-e�
personally appeared before me this ..� day of J "kl and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
/�pEARCE V
NOTARY u,
Q — O
a AVBI.�G z
9 V
COUtJT'I'�
SEAL
My commission expires 10 - k , "w 0%
Form SWU-102 Rev 3.99 Page 4 of 4
r
Permit No.
(to he provided by DW0)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT FL'S 2u8%
This form may be photocopied for use as an original
DWO Stonnwater Management Nan Review: ®WQ
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
1. PROJECT INFORMATION
Project Name: McCullers Relo F
Contact Person: John Tucker
For projects with multiple basins.
elevctlians
Phone Number. (919 ) 5670483
fy which basin this woiksheet applies to: Basin 1
Basin Bottom Elevation
282.00
g.
Permanent Pool Elevation
286.00
ft.
Temporary Pool Elevation
287.90
ft.
areas
Permanent Pool Surface Area 42,491
sq. ft.
Drainage Area
39.10
ac.
Impervious Area
19.37
ac.
(floor q/ the basin)
(elevation ofthe orifice)
(elevation oflhe discharge structure overflow)
(water sau,face area at the orifice elevation)
(on -site and oJJ-site drainage to the basin)
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 134,244 cu. ft. (combined volume ofinain basin andforebay)
Temporary Pool Volume 85,630 cu. ft. (volume detained above the perwianent pool)
Forebay Volume 26,966 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAJ 173
Diameter of Orifice 4 n.
Design Rainfall 1 n.
Design TSS Removal 2 85 %
(sun face urea to drainage area ratio fi orn DNVQ table)
(2 to 5 day temporary pool draw -down required)
(minimum 85%required)
Form SWU-102 Rev 3.99 i Page I of 4
r
Pond Number
Sheet 1 of 2
1.00 Depth of Runoff, inches
85630 Volume of Runoff, cf
1.9 Depth of Temp Pool, feet
I
60 Desired Computational Interval, minutes
286.0 Starting Water Surface Elev.
287.9 Water Elevation
292.0 Top of Dam
Initial Discharge
Discharge at 2 days
Discharge at 5 days
Storage.
Inc.
Time, min.
c1
Stage. It
0
0
85630
1.9
1
so
83642
1.8
2
120
81687
1.8
3
180
79755
1.a
4
240
77847
1.7
5
300
75963
1.7
6
360
74102
1.6
7
420
72265
1.6
8
480
70451
1,6
9
540
68662
1.5
10
600
6b695
1.5
11
560
65153
1.5
12
720
63435
1.4
13
780
61740
to
14
840
60070
1.4
15
900
58423
1.3
16
960
56800
1.3
17
1020
55202
1.3
18
1080
53628
1.2
19
1140
52077
1.2
20
1200
50552
1.2
21
1260
49050
1.1
22
1320
47573
1.1
23
1380
46120
1.1
24
1440
44692
1.0
25
1500
43288
1.0
26
1560
41909
1.0
27
1620
40555
0.0
28
1680
39225
0.9
29
1740
37921
0.9
30
1800
36641
0.9
31
1860
35385
0.8
32
1920
34156
0.8
33
1980
32951
0.8
34
2040
31771
0.8
35
2100
30616
0.7
36
2160
29487
0.7
37
2220
28383
0.7
38
2280
27305
0.7
39
2340
26252
0.6
It
287,90
287.84
287.80
287,76
287.72
287.68
257.65
287.61
287.57
287,53
287.50
287,46
287.43
287.39
287.36
287.32
287,29
287.25
287.22
287,19
287.16
287.12
287,09
28706
287,03
287.00
286,97
28604
286.91
286,88
286.86
286.83
286.80
286.78
286.75
286,73
286.70
286.68
286.65
286,63
43268.0 Ks, constant
1.1 b, exponent
286.0 Reference Elevation, feet
4.0 Orfice Dia, inches
1.0 Number of Or6ces
0.6 Orifice Coefi
286.0 Invert Elevation. feet
0.6 cfs
0.2 cfs
0.0 cfs
Primary
Dis., cfs
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0,5
0.5
0.5
0.5
0.5
0.6
0.5
0.4
0.4
0.4
0.4
04
0.4
0.4
04
0.4
04
0.4
0.4
0.4
04
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
55
3300
12951
0.3
56--
3360
12350
0.3
57
3420
11788
0.3
58
3480
1128u
u.3
59
3540
10766
0.3
60
3600
10301
0.3
61
3660
9864
0.3
62
3720
0452
0.2
63
3780
9065
0.2
64
3840
8699
0.2
65
3900
8353
0.2
66
3960
8027
0.2
67
4020
7718
0.2
68
4080
7425
0.2
69
4140
7148
0.2
70
4200
6885
0.2
71
4260
6635
0.2
72
4320
6398
0.2
73
4380
6173
0.2
74
4440
5958
0.2
75
4500
5754
0.2
76
4560
5559
0.1
77
4620
5374
0.1
78
4680
5197
0.1
79
474n
6096
01
80
4800
4867
0.1
81
4860
4713
0.1
82
4920
4566
0.1
83
4980
4424
0.1
84
5040
4289
0.1
85
5100
4160
0.1
86
5160
4036
0.1
87
5220
3917
0.1
88
5280
3503
0.1
89
5340
3694
0.1
90
5400
3589
0.1
91
5460
3488
0,1
92
6520
3391
0.1
93
5580
3298
0.1
94
5640
3208
0.1
95
5700
3122
0.1
96
5760
3039
0.1
97
5820
2959
0.1
98
5880
2881
0.1
99
5940
2807
0.1
100
6000
2735
0.1
1u1
ou6U
2588
u.l
102
6120
2599
0.1
103
6180
2535
0.1
104
6240
2473
0.1
105
6300
2413
0.1
106
6360
2355
0.1
107
6420
2298
0.1
108
6480
2244
0.1
109
6540
2191
0.1
110
6600
2141
0.1
111
6660
2091
0.1
112
6720
2044
0.1
113
6780
1998
0.1
114
6840
1953
0.1
115
6900
1910
0.1
116
6960
1868
0.1
117
7020
1827
0.1
286.33
286.31
286.30
186.29
286.28
286.26
286.25
28624
286.23
286.23
286.22
286.21
286.20
286.20
286.19
286.18
286.18
286.17
286.16
286.16
200.15
286.15
286.14
286.14
9P6 14
286.13
286.13
286.12
286.12
286.12
286.11
286.11
286.11
266.11
286.10
286.10
286, 10
286.09
286.09
286.09
286.09
286.09
286.08
286.08
286.08
286.08
26ti.U8
286.07
286.07
286.07
286.07
286.07
286.07
286.06
286.06
286.06
286.06
286.06
286.06
286.06
286.06
286.05
286.05
0.2
0.2
0.1
U.1
0./
0.1
0.1
0.1
0.1
01
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.0
0.0
nn
0.0
0.0
0.0
0.0
0.0
0.0
6.6
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
00
0.0
0.0
0.0
0.0
0.0
u.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Sheet 2 of 2
Permit No.
State of North Carolina (lobe provided by DWQ)
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
A complete stormwater management) plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: McCullers Relo Facility j
Contact Person: John Tucker
Phone Number: ( 919 ) 567 0483
For projects with multiple basins,
specify
which basin
this workshect applies to: Basin 2
elevations
Basin Bottom Elevation
280.00
ft.
(floor of the basin)
Permanent Pool Elevation
286.00
ft.
(elevation of the orifice)
Temporary Pool Elevation
288.00
$,
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
28,722
sq. ft.
(watersinface area at the orifice elevation)
Drainage Area
21.3
ac.
(on -site and off -site drainage to the basin)
Impervious Area
17.20
ac,
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
90,753
1 cu. ft.
(combined volume ofmain basin and,foreboy)
Temporary Pool Volume
60,767
cu. ft.
(volume detained above the permanent pool)
Forebay Volume
24,784
cu. ft.
(approximately 20%Oftotal volume)
Other parameters
SA/DA
Diameter of Orifice
Design Rainfall
Design TSS Removal z
FormSWU-102 Rev3.99
2.39
12
(surface area to drainage area ratio from DWQ table)
in. (2 to 5 day temporary pool draw -down required)
in.
% (minimtnn 85% required)
Page I of 4
Pond Number
2
/d f 3
Inc.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1.00 Depth of Runoff, inches
60767 Volume of Runoff, cf
2.0 Depth oflTemp Pool, feet
1
60 Desired Computational Interval, minutes
286.0 Starting Water Surface Elev. (Assumed)
288.0 Water Elevation
292.0 Top of
Time, min.
0
60
120
180
240
300
360
420
480
540
600
660
720
780
840
900
960
1020
1080
1140
1200
1260
1320
1380
1440
im
Initial Discharge
Discharge at 2 days
Discharge at 5 days
28586.2 Ks, constant
1.1 b, exponent
286.0 Reference Elevation, feet
2.5 Orfice Dia, inches -
1.0 Number of Orfices
0.6 Orifice Coeff
286.0 Invert Elevation, feet
0.2 cfs
0.2 cfs
0.0 cfs
Storage,
Primary
cf
Stage, ft.
Elev., ft.
Dis., cfs
60767
2.0
287.97
0.2
59961
1.9
287.95
0.2
59160
1.9
287.92
0.2
58363
1.9
287.90
0.2
57573
1.9
287.88
0.2
56787
1.9
287.86
0.2
56006
1.8
287.83
0.2
55231
1.8
287.81
0.2
54460
1.8
287.79
0.2
53695
1.8
287.76
0.2
52935
1.7
287.74
0.2
52180
1.7
287.72
0.2
51430
1.7
287.70
0.2
50686
1.7
287.67
0.2
49946
1.7
287.65
0.2
49212
1.6
287.63
0.2
48483
1.6
287.61
0.2
47759
1.6
287.59
0.2
47041
1.6
287.57
0.2
46328
1.5
287.54
0.2
45620
1.5
287.52
0.2
44917
1.5
287.50
0.2
44219
1.5
287.48
0.2
43527
1.5
287.46
0.2
42840
1.4
287.44
0.2
Sheet 2 of 3
39
2340
33174
1.1
287.14
0.2
40
2400
32572
1.1
287.12
0.2
41
2460
31976
1.1
287.11
0.2
42
2520
31386
1.1
287.09
0.2
43
2580
30801
1.1
287.07
0.2
44
2640
30221
1.1
287.05
0.2
45
2700
29647
1.0
287.03
0.2
46
2760
29078
1.0
287.02
0.2
47
2820
28515
1.0
287.00
0.2
48
2880
27957
1.0
286.98
0.2
49
2940
27405
1.0
286.96
0.2
50
3000 I
26859
0.9
286.95
0.2
51
3060
26317
0.9
286.93
0.1
52
3120
25782
0.9
286.91
0.1
53
3180
25252
0.9
286.89
0.1
54
3240
24728
0.9
286.88
0.1
55
3300
24209
0.9
286.86
0.1
56
3360
23695
0.8
286.84
0.1
57
3420
23188
0.8
286.83
0.1
58
3480
22686
0.8
286.81
0.1
59
3540 1
22189
0.8
286.80
0.1
60
3600
21699
0.8
286.78
0.1
61
3660
21214
0.8
286.76
0.1
62
3720
20734
0.7
286.75
0.1
63
3780
20261
0.7
286.73
0.1
64
3840
19793
0.7
286.72
0.1
65
3900
19330
0.7
286.70
0.1
66
3960
18874
0.7
286.69
0.1
67
4020
18423
0.7
286.67
0.1
68
4080
17978
0.7
286.66
0.1
69
4140
I 17539
0.6
286.64
0.1
70
4200
17105
0.6
286.63
0.1
71
4260
16677
0.6
286.62
0.1
72
4320
16256
0.6
286.60
0.1
73
4380
15839
0.6
286.59
0.1
74
4440
15429
0.6
286.57
0.1
75
4500
15025
0.6
286.56
0.1
76
4560
14626
0.5
286.55
0.1
77
4620
14234
0.5
286.53
0.1
78
4680
13847
0.5
286.52
0.1
79
4740
13467
0.5
286.51
0.1
80
4800
13092
0.5
286.49
0.1
81
4860
12723
0.5
286.48
0.1
82
4920
12360
0.5
286.47
0.1
83
4980
12003
0.5
286.46
0.1
Sheet 3 of 3
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
5880
5940
6000
6060
6120
6180
6240
6300
6360
6420
6480
6540
6600
6660
6720
6780
6840
6900
6960
7020
7080
7140
7200
7384
0.3
286.30
0.1
7126
0.3
286.29
0.1
6874
0.3
286.28
0.1
6629
0.3
286.27
0.1
6390
0.3
286.26
0.1
6157
0.3
286.25
0.1
5931
0.2
286.24
0.1
5712
0.2
286.23
0.1'
5499
0.2
286.23
0.1
5292
0.2
286.22
0.1
5092
0.2
286.21
0.1
4899
0.2
286.20
0.1
4714
0.2
286.20
0.0
4538
0.2
286.19
0.0
4370
0.2
286.18
0.0
4211
0.2
286.18
0.0
4060
0.2
286.17
0.0
3916
0.2
286.17
0.0
3779
0.2
286.16
0.0
3649
0.2
286.16
0.0
3524
0.2
286.15
0.0
3405
0.1
286.15
0.0
3292
0.1
286.14
0.0
Pennit 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
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
L PROJECT' INFORMATION
Project Name: McCullers Relo Facility
Contact Person: John Tucker
Phone Number: (919 ) 567 0483
For projects with multiple basins, specify
which basin
I
this worksheet applies to: Basin 3
elevations
Basin Bottom Elevation
286.00
ft.
(17oor of the basin)
Permanent Pool Elevation
292.00
ft.
(elevation ofthe orifice)
Temporary Pool Elevation
294.00
ft.
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
39,245
sq. rt.
(water surface area at the orifice elevation)
Drainage Area
37.80
ac.
(on -site and off -site drainage to the basin)
Impervious Area
21.50
I ac.
I
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
114,803,
cu. ft.
(combined volume of main basin andforebav)
Temporary Pool Volume
80.690
i cu. ft.
(volume detained above the permanent pool)
Forebay Volume
24,967
cu. ft.
I
(approximately 20% of total volume)
Other parameters
S A/DA I
1.58
I
(surface area to drainage area ratio from DWQ table)
Diameter of Orifice
12
in.
(2 to 5 day temporary pool draw -down required)
Design Rainfall
1
in.
Design TSS Removal 2
85
%
(minimum 85% required)
Form SWU-102 Rev 3,99 Page I of 4
Pond Number 3
/.,3
Inc.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
1.00
Depth of Runoff, inches
37367.1
80690
Volume of Runoff, cf
1.1
1.97
i Depth of Temp Pool, feet
292.0
60
Desired Computational Interval, minutes
3.0
292.0
Starting Water Surface Elev. (Assumed)
1.0
294.0
Water Elevation
0.6
292.0
296.0
Top of Dam
Initial Discharge
0.3
Discharge at 2 days
0.2
Discharge at 5 days
0.0
Storage,
Primary
Time, min.
cf Stage, ft. Elev., ft.
Dis., cfs
0
80690 1.97
293.97
0.3
60
79536 1.95
293.95
0.3
120
78389 1.92
293.92
0.3
180
77250 1.90
293.90
0.3
240
1 76119 1.87
293.87
0.3
300
74996 1.85
293.85
0.3
360
73881 1.82
293.82
0.3
420
72773 1.80
293.80
0.3
480
1 71674 1.78
293.78
0.3
540
70582 1.75
293.75
0.3
600
69499 1.73
293.73
0.3
660
68423 1.70
293.70
0.3
720
67355 1.68
293.68
0.3
780
66295 1.66
293.66
0.3
840
65243 1.63
293.63
0.3
900
64200 1.61
293.61
0.3
960
63164 1.59
293.59
0.3
1020
62136 1.57
293.57
0.3
1080
61116 1.54
293.54
0.3
1140
60104 1.52
293.52
0.3
1200
59101 1.50
293.50
0.3
1260
58105 1.48
293.48
0.3
36
2160
44155
1.16
293.16
0.2
37
2220
43291
1.14
293.14
0.2
38
2280
42436
1.12
293.12
0.2
39
2340
41589
1.10
293.10
0.2
40
2400
40751
1.08
293.08
0.2
41
2460
39921
1.06
293.06
0.2
42
2520
39100
1.04
293.04
0.2
43
2580
38287
1.02
293.02
0.2
44
2640
37482
1.00
293.00
0.2
45
2700
36686
0.98
292.98
0.2
46
2760
35899
0.97
292.97
0.2
47
2820
35120
0.95
292.95
0.2
48
2880
34350
0.93
292.93
0.2
49
2940
33589
0.91
292.91
0.2
50
3000 I
32836
0.89
292.89
0.2
51
3060
32092
0.87
292.87
0.2
52
3120
31356
0.86
292.86
0.2
53
3180
30630
0.84
292.84
0.2
54
3240
29912
0.82
292.82
0.2
55
3300
29202
0.80
292.80
0.2
56
3360
28502
0.79
292.79
0.2
57
3420
27811
0.77
292.77
0.2
58
3480
27128
0.75
292.75
0.2
59
3540
26454
0.74
292.74
0.2
60
3600
25789
0.72
292.72
0.2
61
3660
25134
0.70
292.70
0.2
62
3720
24487
0.69
292.69
0.2
63
3780
23849
0.67
292.67
0.2
64
3840
I 23220
0.66
292.66
0.2
65
3900
22600
0.64
292.64
0.2
66
3960
21989
0.63
292.63
0.2
67
4020
21388
0.61
292.61
0.2
68
4080
20795
0.60
292.60
0.2
69
4140
20212
0.58
292.58
0.2
70
4200
19638
0.57
292.57
0.2
71
4260
19073
0.55
292.55
0.2
72
4320
18518
0.54
292.54
0.2
73
4380
17971
0.52
292.52
0.1
74
4440
17434
0.51
292.51
0.1
75
4500
I 16907
0.50
292.50
0.1
76
4560
16389
0.48
292.48
0.1
77
4620
15880
0.47
292.47
0.1
78
4680
15381
0.46
292.46
0.1
79
4740
14892
0.44
292.44
0.1
80
4800
14412
I
0.43
292.43
0.1
5riG6$-�9't 1 ,
Z�3
✓ltGG 1. J V1 J
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
5700
5760
5820
5880
5940
6000
6060
6120
6180
6240
6300
6360
6420
6480
6540
6600
6660
6720
6780
6840
6900
6960
7020
7080
7140
7200
8388
0.27
292.27
0.1
8067
0.26
292.26
0.1
7756
0.25
292.25
0.1
7455
0.24
292.24
0.1
7169
0.23
292.23
0.1
6898
0.23
292.23
0.1
6640
0.22
292.22
0.1
6395
0.21
292.21
0.1
6162
0.20
292.20
0.1
5939
0.20
292.20
0.1
5728
0.19
292.19
0.1
5526
0.19
292.19
0.1
5334
0.18
292.18
0.1
5150
0.17
292.17
0.0
4975
0.17
292.17
0.0
4808
0.16
292.16
0.0
4648
0.16
292.16
0.0
4495
0.15
292.15
0.0
4348
0.15
292.15
0.0
4208
0.15
292.15
0.0
4074
0.14
292.14
0.0
3946
0.14
292.14
0.0
3822
0.13
292.13
0.0
3704
0.13
292.13
0.0
3591
0.13
292.13
0.0
3482
0.12
292.12
0.0
3p