HomeMy WebLinkAboutSW8090104_Current Permit_20090403a
ACD`
EE WR
North Carolina Department of Environment and
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
April 3, 2009
Mr. Christopher Dunbar, Manager
BRC JAX Carolina Forest, LLC
5826 Samet Drive
Suite 105
High Point, NC 27265
Natural Resources
Subject: State Stormwater Management Permit No. SW8 090104
The Legacy at Carolina Forest
High Density Commercial Wet Pond Project
Onslow County
Dear Mr. Dunbar:
Dee Freeman
Secretary
The Wilmington Regional Office received a complete State Stormwater Management Permit Application
for The Legacy at Carolina Forest on March 12, 2009. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in
Session Law 2006-246 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 090104 dated
April 3, 2009, for the construction and operation of the subject project.
This permit shall be effective from the date of issuance until April 3, 2019, 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 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 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 Kelly
Johnson, or meat (910) 796-7215.
Sinc rely,
��LD sw�
Georgette Scott
Stormwater Supervisor
Division of Water Quality
GDS/KPJ: S:1WQSISTORMWATERIPERMIT1090104.apr09
cc: Robert Thompson, PE, CPT Engineering and Surveying, Inc.
Onslow County Inspections
Division of Coastal Management
Wilmington Regional Office
Central Files
State Stormwater Management Systems
Permit No. SW8 090104
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STGRMINIATER MANAGEMENT PERMIT
HIGH DENSITY COMMERCIAL 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
Christopher Dunbar & BRC JAX Carolina Forest, LLC
The Legacy at Carolina Forest
339 Carolina Forest Blvd, Onslow County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with the
provisions of Session Law 2006-246 and 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 Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until April 3, 2019, 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 448,668 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section 1.6
on page 4 of this permit, and per 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 system.
5. The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent surface waters.
Page 2 of 8
SW8 090401
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a.
Drainage Area, acres:
696,960
Onsite, ft2:
696,960
Offsite, ft2:
0
b.
Total Impervious Surfaces, ft2:
448,668.0
Buildings BUA, ft2:
161,607.6
Roads/Parking, ft2:
215,622.0
Sidewalk & Concrete, ft2:
71,438.4
Offsite, ft2:
0
c.
Average Pond Design Depth, feet:
4.5
d.
TSS removal efficiency:
90%
e.
Design Storm:
1.5
f.
Permanent Pool Elevation, FMSL:
39.00
Pool Surface Area, ft2:
40,954
hPermanent
.
Permitted Storage Volume, ft3:
104,019
i.
Storage Elevation, FMSL:
41.25
j.
Pre-dev. 1 yr. 24 hr. peak flowrate, cfs:
20.46
k.
Controlling Orifice:
3" O pipe.
I.
Orifice flowrate, cfs:
0.21
m.
Permanent Pool Volume, ft3:
182,115
n.
Forebay Volume, ft3:
39,360
o.
Maximum Fountain Horsepower:
3/
p.
Receiving Stream / River Basin:
UT Half Moon Creek
/ White Oak
q.
Stream Index Number:
19-6
r.
Classification of Water Body:
"C, NSW'
II. SCHEDULE OF COMPLIANCE
i . 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.
a. 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.
Page 3 of 8
SW8 090401
5. The permittee shall submit to the Division of Water Quality 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.
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 development, subdivision, acquisition, lease or sale of any, 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 for a minimum of ten years from the date of the completion of
construction.
Page 4 of 8
SW8 090401
14. 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.
15. 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 the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the deepest
part of the pond.
c. The falling water from the fountain must be centered in the pond, away from
the shoreline.
d. The maximum horsepower for the fountain's pump is based on the
permanent pool volume. The maximum pump power for a fountain in this
pond is 3/ .
III. GENERAL CONDITIONS
1. 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 of Water
Quality, 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 of Water Quality, 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 DENR 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.
Page 5 of 8
SW8 090401
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 Session Law 2006-
246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days prior to making such changes.
12. The permittee shall submit a permit renewal application at least 180 days prior to
the expiration date of this permit. The renewal request must include the
appropriate documentation and the processing fee.
Permit issued this the 3rd day of April 2009.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
wI VV1GG11 1 1. V4111110, "110%iLVI
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6of8
SW8 090401
The Legacy at Carolina Forest
Stormwater Permit No. SW8 090104
Onslow Countv
Designer's Certification
1, , 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 specification:
Signature
Registration Number
Date
SEAL
Page 7 of 8
SW8 090401
Certification Requirements:
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system 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 such 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.
8. 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,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 8 of 8
Permit Number:,. m ;!�/ ty
(to be provided by DWQ)
Drainage Area Number:
Wet 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 BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
A
pretreatment including forebays and the vegetated filter if one is provided. + o
N
This system (check one):
0
❑ does ® does not incorporate a vegetated filter at the outlet. z
Q
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
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:
Potentialproblem:
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.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
the pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4
Permit Number:
(to be provided by DWQ)
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 damaged
Re air 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 reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 6 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 6 feet in the forebay, the sediment shall
be removed.
BASIN DIAGRAM
ill in the blanks)
0 Permanent Pool Elevation 39'
Sediment Removal 33' Pe manen Pool
------------ Volume Sediment Removal Elevation 33 Volume
Bottom Elevatio 32' -it Min.
-------------------------------------------- ------
Sediment Bottom Elevation32' 1-ft n
Storage Sedimer
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:The Legacy at Carolina Forest
BMP drainage area number:l
Print name: Christopher T. Dunbar
Title:Manager
Addri
Phone
Signs
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, Robee f D. Tko rr P S o ^ , a Notary Public for the State of
No,r'M. C a r o I; n w , County of Da. v: d S o v, , do hereby certify that
Gbpt S4s eker T personally appeared before me this aft_
day of D t c e" Of , 10 a PJ , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
�o��riNR+M►i
s c;
r
CO
t: '.- r�rrFrrrrtlta��N t'�"
SEAL
My commission expires to - 7 " 01
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4
b OCro.\
IJWQ Msi 01,4y
Date Received
Fee Paid
Permit
—®
`
Jf✓f�J. -f�j— 12/60
/Number
`0 , O
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality RECEIVED
STORMWATER MANAGEMENT PERMIT APPLICATIONYW" 2009
This form may be photocopied for use as an original
BY:
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
BRC JAX CAROLINA FOREST, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
CHRISTOPHER DUNBAR, MANAGER
3. Mailing Address for person listed in item 2 above:
5826 SAMET DRIVE SUITE 105
City:HIGH POINT State:NC Zip:27265
Phone: (336 ) 229-1500 Fax: (336 ) 889-1503
Email:j grdich@blueridgecompanies.com
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
The Legacy at Carolina Forest - i'it
5. Location of Project (street address):
339 Carolina Forest Blvd.
City:lacksonville County:Onslow Zip:28540
6. Directions to project (from nearest major intersection):
8801f North of the intersection of Carolina Forest Blvd. and Western Blvd.
7. Latitude:34° 48' 10" N Longitude:77° 24' 33" W of project
8. Contact person who can answer questions about the project:
Name:ROBERT D. THOMPSON Telephone Number: (336 ) 812-8800 ext 313
Email:dannyt@cptengineering.com
H. PERMIT INFORMATION:
1. Specify whether project is (check one): ®New ❑Renewal ❑Modification
Form SWU-101 Version 09.25.08 Page 1 of 4
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 ®High Density []Redevelop ❑General Permit ❑Universal SMP ❑Other
4. 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/Erosion Control ❑404/401 Permit ®NPDES Industrial Stormwater
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. 51tTOLD U 1.S". Corn&cl / !?aSo b r» ,�
The stormwater will be piped to a stormwater wet pond to treat th 1' unoff and also detain the lyr and 10yr '/%6
events to Pre -developed rates. This is for Phase 1, a future pond will serve Phase 2.
2. Stormwater runoff from this project drains to the White Oak River basin.
3. Total Property Area: 38.98/19.34Phl acres 4. Total Coastal Wetlands Area: 4.51Total/1.46PH1acres
5. Total Property Area (3) — Total Coastal Wetlands Area (4) = Total Project Area**:34.47Total/17.88PH1 acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA):10.3/17.ffi'5 .6Ph1 %
7. How many drainage areas does the project have?1 CiAul0
8. 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.
For high density projects, complete the table with one drainage area for each eneineered stormwater device.
Basin Information
Drainage Area 1
Dram Area 2
Receiving Stream Name
UT -WHITE OAK RB
Stream Class & Index No.
C/NSW
Total Drainage Area (sf)
696P60sr
On -site Drainage Area (sf)
696960
Off -site Drainage Area (sf)
0
Existing Impervious* Area (sf)
0
Proposed Impervious*Area (sf)
447766SF OR 10.3AC
% Impervious* Area (total)
64% OF DA
Im ery7:ous* Surface Area
p _
Drainage � iva 1
Drainage Area 2
On -site Buildings (sf)
161607.6
On -site Streets (sf)
102801.6
On -site Parking (sf)
112820.4
On -site Sidewalks (sf)
71438.4
Other on -site (sf)
0
Off -site (sr)
0
Total (sf):
448668sf..10.3Ac
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area
percentage calculation. This is the area used to calculate overall percent project built upon area (BUA).
Form SWU-101 Version 09.25.08 Page 2 of 4
9. How was the off -site impervious area listed above derived
Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located
within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater
requirements.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following property 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.
Forms can be downloaded from http://h2o.enr.state.nc.us/sulbmi2 forms.htm - deed restrictions.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded property restrictions and protective covenants for this
project shall include all the applicable items required in the above form, 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.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be subi7utted for each
BMP specified for this project. Contact the Stormwater Permitting Unit at (919) 807-6300 for the status and
availability of these forms. Forms can be downloaded from http://h2o.enr.state.nc.us/su/bml2 forms.htm.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Form SW401-Cistern
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Cistern Supplement
Form SWU-101 Version 09.25.08 Page 3 of 4
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. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at htip://h2o.enr.state.nc.us/su/Msi-mVs.h )
1. 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 j
• Original and one copy of the Deed Restrictions & Protective Covenants Form (if r(
required as per Part IV above)
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP i
• Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENR Q
• Calculations & detailed narrative description of stormwater treatment/management Z
• Copy of any applicable soils report 1
• Two copies of plans and specifications (sealed, signed & dated), including: IZ !
- 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)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm)
Designated agent (individual or firm):CPT ENGINEERING AND SURVEYING, ROBERT D. THOMPSON, P.E.
Mailing Address:4400 TYNING STREET
City:HIGH POINT State:NC Zip:27265
Phone: (336 ) 812-8800 EXT 313 Fax: (336 ) 812-8780
Email:DANNYT@CPTENGINEERING.COM
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) C k o - slo ekt r I Y
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 conform e with the approved plans, that the required deed restrictions
and protective�v ants will be r°rded, and t the proposed project complies with the requirements of 15A
NCAC 214.19t [f= A 1
Sri
Form SWU-101 Version 09.25.08 Page 4 of 4
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NCDENR
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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along will? all of the required information.
I. PRQJEt;,T INFORMATION
Project name
The Legacy At Carolina Forest
Contact person
Robert D. Thompson, P E.
Phone number
336.812.8800 ext. 313
Date
49/2009
Drainage area number
i (Pond 1)
II. DESIGN INFORMATION
Site Characteristics
Drainage area
696,960 ry
Impervious area, post -development
448,668 ft'
5 impervious
64.38 %
Design rainfall depth
1.5 in
Storage Volume: Non -SA Waters
Minimum volume required
54,886 ry OK
y
Volume provided
104,019 ry`
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5" runoff volume
ft
Pre -development 1-yr, 24-hr runoff
ft..
Post.developments-yr.24-hrrunoff
ft:
Minimum volume required
0 ft'
Volume provided
ft'
Peak Flow Calculations
Is the pre/post control of the i yr 24hr storm peak flow required? Y (Y or N)
1-yr, 24-hr rainfall depth
3.7 in
Rational C, pre -development
Rational C, post -development
0.34 (unilless)
0.65 (unilless)
Rainfall intensity: 1-yr, 24-hr storm
0.16 in/hr OK
Pre -development 1-yr, 24-hr peak flow
20.46 f0sec
Post -development 1-yr, 24-hr peak flow
0.75 ft`/sec
Pre/Post 1-yr, 24-hr peak flow control
-19.71 ft'';ser.
Elevations
Temporary pool elevation
41.25 foist
Permanent pool elevation
39.00 f nsl
SHWT elevation (approx. at the perm. pool elevation)
39. 00 fmsl
Top of 10ft vegetated shelf elevation
39.50 fmsl
Bottom of tuft vegetated shelf elevation
Sediment cleanout. top elevation (bottom of
38.50 foist Data not needed for calculation option 41. but OK if provided. +
pond)
Sediment cleanout. bottom elevation
33.00 foisl
32.00 frost Data not needed for ralculation option 41, but OK if provided.
Sediment storage provided
_ 1.00 ft
Is there additional volurne stored above the state -required temp. pool? Y (Y or N)
Elevation of the top of the additional volume
41.3 foist OK
_
Form :_w.iot-we,flmention i:asin•r4,rv.5
PArts L a 11 Design Summery. Pstje I )f 2
111. DESIGN INFORMATION
Surface Areas
Area. temporary pool
46.016 ft°
Area REQUIRED, permanent pool
38,890 ft`
SAIDA ratio
Area PROVIDED, permanent pool. A, ,
5.58 (unitless)
40.954 ft`
OK
Area, bottom of 10ft vegetated shelf, A
37,000 ft
Area, sediment cleanoW, top elevation (bottom of pond), A
22,117 ft`
Volumes
Volume, temporary pool
104,019 ft
OK
Volume, permanent pool, V
182.115 ff`
Volume, forebay (sum of forebays if more than one frebay)
39,360 ft�'
Forebay % of permanent pool volume
21.6-% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y (Y or N)
Mountain/Piedmont SAIDA Table Used?
N (Y or N)
SA/DA ratio
5.58 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10.2b)
Y (Y or N)
Volume. permanent pool, V, ,, . ,
182,115 11 `
OK
Area provided, permanent pool. A.,,,
40.954 ft`
UK
Average depth calculated
4.40 ft
OK
Average depth used in SA/DA, d,,., (Round to nearest 0.511)
4.5 ft
OK
Calculation option 2 used? (See Figure 10-2b)
N (Y or N)
Area provided, permanent pool. A,.,,,, , ,
ft'
Area, bottom of 1 Oft vegetated shelf. A,.,,.. ,,
ft'
Area, sediment cleanoul, top elevation (bottom of pond), A _
ft`
"Depth" (distance b/w bottom of loft shelf and top of sediment)
ft
Average depth calculated
ft
Average depth used in SAIDA, d;,,, (Round to nearest 0.5ft)
ft
Drawdown Calculations
Drawdown through orifice?
Y (Y or N)
Diameter of orifice (if circular)
3.00 in
Area of orifice (if -non -circular)
in
Coefficient of discharge (C,;)
Driving head (H,)
0.60 (unitless)
0.75 ft
Drawdown through weir?
N (Y or N)
Weir type
(unitless)
Coefficient of discharge (C.,,)
(unitless)
Length of weir (L)
ft
Driving head (H)
ft
Pre -development 1-yr, 24-hr peak flow
20.46 Wi/sec
OK
Post -development 1-yr, 24-hr peak flow
0.75 ft ;sec
OK
Storage volume discharge rate (through discharge orifice or weir)
0.21 ft'lsec
Storage volume drawdown tune
3.10 days
Y
OK, draws down in 2-5 (lays.
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Additional information
Vegetated side slopes
3 :1
OK
Vegetated shelf slope
10 : I
OK
Vegetated shelf width
10.0 ft
OK
Length of flowpalh to width ratio
:1
Length to width ratio
:1
Trash rack for overflow & orifice?
Y (Y or N)
OK
Freeboard provided
ft
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
PUMP OUT
Form SW401-Wet Detention Basin-R;w.5
Parts L & tl. Design Summery. Page'_ of 2