HomeMy WebLinkAboutSW8990732_HISTORICAL FILE_19991110STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SWL of O'l32
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
(q g cl i I 10
YYYYMMDD
Department of Environment
and Natural Resources
Wilmington Regional Office
James B Hunt, Jr., Governor
Bill Holman, Secretary
Division of Water Quality
Mr Terry Turner, President
Saturn Development
3901 Oleander Drive
Wilmington, NC 28403
Dear Mr Turner
A74ZIU1
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND N/ URAL RESOURCES
November 10, 1999
Subject Permit No SW8990732
Brewster Place Phase 2
High Density Subdivision Stormwater Project
New Hanover County
The Wilmington Regional Office received a complete Stormwater Management Permit Application for Brewster Place Phase
2 on September 21 1999 Staff review of the plans and specifications has determined that the project, as proposed, will
complywiththeStormwater Regulations setforthmTrtle 15ANCAC2H 1000 We are forwarding Penn it No SW8990732,
dated November 10, 1999, for the construction of the project, Brewster Place Phase 2
This permit shall be effective from the date of issuance until November 10, 2009, 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 Linda Lewis, or me at (910)
395-3900
Sincerely,
Crlti _A ` 1
Rick Shiver
Water Quality Regional Supervisor
RSS/ arl S \WQS\STORMWAT\PERMIT\990732 NOV
cc David Hollis P E
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering -
Linda Lewis
Wilmington Regional Office
Central Files
127 Cardinal Dr Ext, Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004
An Equal Opportunity Affirmative Action Emplover 50% recycled/10% post -consumer paper
State stormwater Management Systems
PermtNo SW8990732
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Saturn Development
Brewster Place Phase 2
New Hanover County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC
2H 1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by the Division of Water Quality
and considered a part of this permit
This permit shall be effective from the date of issuance until November 10, 2009 and shall be subject to the
following specified conditions and limitations
I DESIGN STANDARDS
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 on page
3 of this permit, the Project Data Sheet The subdivision is permitted for 107 lots, each allowed 4,000 ft2
square feet of built -upon area
Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit
4 All lots are proposed to be graded such that the runoff flows into the street or onsite ditches which drain into
the pond
State Storm"ater Management Systems
Permit No SW8 990732
Project Name
Permit Number
Location
Applicant
Mailing Address
Application Date
Name of Receiving Stream / Index #
Classification of Water Body
If Class SA, chloride sampling result
Design Storm
Pond Depth, feet
Permanent Pool Elevation, FMSL
Total Impervious Surfaces, ft2
107 lots at 4,000 ft2 each
Roads/Parking, ft2
Other, ft2
Offsite Area entering Pond, ft2
Required Surface Area, ft2
Provided Surface Area, ft2 ft
Required Storage Volume, '
Provided Storage Volume, fP
Temporary Storage Elevation, FMSL
Controlling Orifice
0
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Brewster Place Phase 2
SW8 990732
New Hanover County
Mr Terry Turner, President
Saturn Development
3901 Oleander DriveWilmington, NC 28403
September 21, 1999
Mott Creek / (CFR 18-82)
"C Sw"
s n/a
1"
75
65
604,138
428,000
176,138
n/a
None, per Engineer
16,993
59,739
51,287
64,780
75
1" � pipe
3
State Stormwater Management Systems
PermuNo SW899073)
II SCHEDULE OF COMPLIANCE
No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such as swales) shown
on the approved plans as part of the stormwater management system without submitting a revision to the
permit and receiving approval from the Division
The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area Once the lot transfer is complete, the built -upon area may not be revised without approval
from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred
to the individual property owner
The following items will require a modification to the permit
a Any revision to the approved plans, regardless of size
b Project name change
c Transfer of ownership
d Redesign or addition to the approved amount of built -upon area
e Further subdivision, acquisition, or sale of the project area The project area is defined as all property
owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought
f Filling in, altering, or piping of any vegetative conveyance shown on the approved plan
4 The Director may determine that other revisions to the project should require a modification to the permit
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
The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface except roads
During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired
immediately
The permittee grants permission to DENR Staff to enter the property for the purposes of inspecting the
project for compliance with the conditions of this permit
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
10 Decorative spray fountams will not be allowed in the stormwater treatment system
11 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 pnor to occupancy of the facility
12 Prior to transfer of ownership, the pond must be inspected by DWQ personnel, and determined to be in
compliance with all permit conditions Records of maintenance activities will be required
State Stormwater Management Systems
Permit No SW8990732
13 The permttee shall at all times 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
Semiannual scheduled inspections (every 6 months)
Sediment removal
c Mowing and revegetation of side slopes
d Immediate repair of eroded areas
e Maintenance of side slopes in accordance with approved plans and specifications
f Debris removal and unclogging of outlet structure, orifice device and catch basins and piping
g Access to the outlet structure must be available at all times
14 Records of maintenance activities must be kept and made available upon request to authorized personnel
of D WQ The records will indicate the date, activity, name of person performing the work and what actions
were taken
15 Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to the
amount as shown on the Project Data Sheet, per Section I, Part 2 The recorded statements must follow the
form
"The maximum built -upon area per lot is 4,000 ft2 This allotted amount includes any built -upon area
constructed within the lot property boundaries, and that portion of the right-of-way between the front
lot line and the edge of the pavement Built upon area includes, but is not limited to, structures,
asphalt, concrete, gravel, brick, stone, slate, and coquina, but does not include raised, open wood
decking, or the water surface of swimming pools "
b "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State "
"Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State "
d "Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations "
"All runoff on the lot must dram into the permitted system This may be accomplished through
providing roof drain gutters which dram to the street, grading the lot to dram toward the street, or
grading perimeter swales and directing them into the pond or street Lots that naturally dram into the
system are not required to provide these measures "
16 A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of
recording the plat, and prior to selling lots The recorded copy must bear the signature of the Permittee, the
deed book number and page, and stamp/signature of the Register of Deeds
17 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
18 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
State Stormwater Management Systems
Permit No S W 8 990732
I11. GENERAL CONDITIONS
This permit is not transferable In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a "Name/Ownership Change Form" must be submitted to the Division
of Water Quality accompanied by appropriate documentation from the parties involved, such as a copy of
the deed of trust Other supporting materials, such as a signed Operation and Maintenance plan in the case
of engineered systems, will also be required The project must be in good standing with DWQ The approval
of this request will be considered on its ments and may or may not be approved
2 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)
which have jurisdiction
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
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
Permittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the
stormwater facilities during normal business hours
Pen -nit issued this the 1 Oth day of November, 1999
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
1) F-. c 4 4 — 4 J A A n
1� Kerr T Stevens, Director
C �l Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 990732
0
State Stormwater Management Systems
Permit No SWS 990732
Brewster Place Phase 2
Stormwater Permit No SW8 990732
New Hanover County
Designer's Certification
Page 1 of 2
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,
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 wrtlun substantial compliance and intent of the approved plans and specifications
The checklist of items on page 2 of this form are a part of this Certification
Noted deviations from approved plans and specifications
SEAL
Signature
Registration Number
Date
State Stormwater Managgement Systems
Permit No SW8990732
Certification Requirements
Page 2 of 2
l 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 drams to the system
4 The outlet/bypass structure elevations are per the approved plan
5 The outlet structure is located per the approved plans
6 Trash rack is provided on the outlet/bypass structure
All slopes are grassed with permanent vegetation
8 Vegetated slopes are no steeper than 3 1
9 The inlets are located per the approved plans and do not cause short-circuiting of the system
10 The permitted amounts of surface area and/or volume have been provided
1 I Required drawdown devices are correctly sized per the approved plans
12 All required design depths are provided
13 All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter
14 The overall dimensions of the system, as shown on the approved plans, are provided
cc NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspector
ram.o,- OFFICE USE
Date Received Fee Paid Pervut Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form inay be photocopied for use as an of iginal
I GENERAL INFORMATION
1 Applicants name (specify the name of the corporation, individual, etc who owns the project)
.Sad-urh pe✓elo,�,-�,eh-F
2 Print Owner/Signing Official's name and title (person legally responsible for facility and compliance)
7 rr>. TurnPr I 1P✓e-idle, �t-
3 Mailing Address for person listed in item 2 above
3 90/ 01ea,n(Pc- 1:)f lve
Cityt0de ina4rin State AlG Zip z94-03
Telephone Number ( Dlo ) --3 9S— 4DoE
4 Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc )
C3rewsler P(c PAare T-.0
5 Location of Project (street address)
City W dr",10/rx-� County NP1✓ lfano✓er
6 Directions to project (from nearest major intersection)
^O//II GOUT O TWV I Z�aCC
''T// AA II�� v 1 iI / /
Carols G AN iI S /'�` 'YZ/-Fakp opx-)" roof Oh '1T) SPr ✓iCC rw0 e I7eKT
12 A ,n'!p Qpe caster piac�
7 Latitude 34`8 l3 44' Longitude 77 S4-'14,97" of project
8 Contact person who can answer questions about the project
Name ltiowarReshJ%c !%( Telephone Number ( Y10 ) 343-800Z
14ano✓el- Des+9A Serv-cev, Pk
II PERMIT INFORMATION
1 Specify whether project is (check one) K New Renewal Modification
Form SWU-101 Version 3 99 Page 1 of 4
2 If this application is being subrrutted as the result of a renewal or modification to an existing permit, list the
existing permit number A/,I - and its issue date (if known)
3 Specify the type of project (check one)
?t Low Density High Density Redevelop _General Pernut _Other
4 Additional Project Requirements (check applicable blanks)
_LAMA Major Sedimentation/Erosion Control _404/401 Permit NPDES Stormwater
Information on required state penruts 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 /(storm/water management for the project .
`4,grm,�la, -e_r cuill be_ rain c( -Fo and "/--rea1e C4P"fe.1-�)aA
re, e.n -han r2.,c( c%� ne J >^ar 907 %SS and 40
wi n a e '%Ae_ Z a., of lO )1P4,r .s-for e✓e«its
2 Stormwater runoff from this project drains to the one %Par River basing/n
3 Total Project Area Z.3 3 acres 4 Project Built Upon Area 4 Z,
5 How many drainage areas does the project have?
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
Bas Info, oimatuoiJM =c
�&% Dimae Ar&WA
a� wag, e
� 4=DramageArea 2 .
r _
Receiving Stream Name
(Y o+l Creek
Receiving Stream Class
G SW
Drainage Area
3 Z, 9 at r e
Existing Impervious* Area
--
Proposed Impervious Area
/3, 87 acres
tin ervious* Area (total)
Z tjo -14 `
Im ery ousr�Surfac Aiea
DiarnageA°ipt, q ,
Nam+ ` _a,.z, -m z»roeYr' 1 ¢ .. 4`i. W+�
,Dramage,,'* real'
o A.,,�_ ..., .�am+��.^'�+ ^• .�-< a
On -site Buildings
9, 8 3 acre
On -site Streets
¢ O¢ cores
On -site Parking
_
On -site Sidewalks
Other on -site
�—
Off-site
Total 13 9-7 core
Total
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
7 How was the off -site impervious area listed above derived?,
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
number
covenants are intended to ensuic ongoing compliance with state stormwater management permit
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 4 000 square feet of any lot shall be covered by stKictures 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 claurung 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 subrmtted for
each BMP specified for this project Contact the Stormwater and General Pernuts Unit at (919) 733-5083 for the
status and availability of these forms
Form SWU-102
Form SWU-103
Form SWU-104
Form SWU-105
Form SWU-106
Form SWU-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement ✓
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
_l
Form SWU-101 Version 3 99
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 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 u Q
• One copy of the applicable Supplement Form(s) for each BMP I ,
• Permit application processing fee of $420 (payable to NCDENR) W
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including f p
- Development/Project name
- Engineer and firm
-Legend
- North arrow 1
- 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 uiformation on your
behalf, please complete this section
Designated agent (individual or firm) 14anoVer De_5ign 5e_r✓ic&51 PA
Mailing Address 319 60It1nui J�fr-eef
City b-A /rn) n g40A State NC__ zip Z L3 401
Phone ( -910 ) 343— 8000
VIII APPLICANT'S CERTIFICATION
Fax ( - l 0 ) 343 — .99 4/
f
I, (print or type name of person listed in General Information, item 2)" f e (lry L)
certify that the information included on tlus 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 the proposed project complies with the requirements of 15A
NCAC 2H 1000-71
Signature L"VI v✓ Date' Z
Form SWU-101 Version 3 99 Page 4 of 4
Permit No
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
Thu form may be photocopied for use as an original
DWQ 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 PJ z6 e2 Ptiase, Two
Contact Person Tern, l urner Phone Number (9/0 1 3JS--J Y' 6
For projects with multiple basins, specify which basin this worksheet applies to
elevations
Basin Bottom Elevation
"/, O ft
lPermanent Pool Elevation
C, S ft
'Temporary Pool Elevation
-7S ft
areas
Permanent Pool Surface Area, 739 sq ft
Drainage Area 32, 9 :� ac
Impervious Area
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA i
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
FormSWU-102 Rev399
)3,07 ac
Z33 -5Z7 cu
;9r 7zo cu
S&2oS-_ cu
Ile
/. � Z
4,0 in
Uin
90 %
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
ft (combined volume of main basin and forebay)
ft (volume detained above the permanent pool)
ft (approximately 20% of total volume)
(surface area to drainage area ratio from DWQ table)
(2 to 5 day temporary pool draw -down required)
(nunimum 85% required)
Page 1 of 4
Footnotes
)t When using the Division SAIDA tables, the correct SAIDA 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%c 1 SS 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 2H 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 irr the Stormwater Management Permit
Application Form, the agent may initial below If a requirement has not been met, attach justification.
Applicants Initials
I-�,V. a The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet)
14'(7 b The forebay volume is approximately equal to 20% of the basin volume
P, r;, c The temporary pool controls runoff from the design storm event
a,p_. d The temporary pool draws down in 2 to 5 days
i
kI A e If required, a 30-foot vegetative filter Is provided at the outlet (include non -erosive flow
calculations)
{�A? f The basin length to width ratio is greater than 3 1
9 X g The basin side slopes above the permanent pool are no steeper than 3 1
1h R h A submerged and vegetated perimeter shelf with a slope of 6 1 or less (show detail)
N , i2, I Vegetative cover above the permanent pool elevation is specified
kl I A trash rack or similar device is provided for both the overflow and onfice
k A recorded drainage easement is provided for each basin including access to nearest right-
of-way
�. re 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
Q, in A mechanism is specified which will dram the basin for maintenance or an emergency
�tea pL4-Vi-A-P
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
_J
This system (check one) 0 does 0/does not incorporate a vegetated filter at the outlet
This system (check one) 0 does 9�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 onfice 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, nprap, etc ) quarterly to
maintain proper functioning
4 Remove accumulated sediment from the wet detention basin system serm-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 a stockpiling near a wet detention basin or stream, etc )
The measuring device used to deterrrune the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments
ly-
When the permanent pool depth reads 5,�LZ s feet in the main pond, the sediment shall be removed
When the permanent pool depth reads 3-375 feet in the forebay, the sediment shall be removed
BASIN DIAGRAM
(fill to the blanks)
Permanent Pool Elevation S
Uit
SedimenAReoval
3 125 75 o--------- -- Sediment Removal Elevation 0. 875 75%
-------------- -----
n------------------------------- /,y 25%aBot� o
Bottom Elevation
FOREBAY MAIN POND
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
Ithrough the emergency drain shall be minimized to the maximum extent practical
Form SWU-102 Rev 3 99 Pave 3 of 4
7 r All components of the wet detention basin system shall be maintained in good working order
i
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 Tel'r-,e %.rner
r
Title Prestoieh F Safurn Oeveelent
Address 39ot 0le- at, de- r Dr.✓e WiNG -8403
Phone—(910 32'S- ¢Qoc
Signature Curti IA/
Date
cA
Note The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president
I, a Notary Public for the State of NC�1� jt' ItYlL1
County of r , do hereby certify that e.rrIA T t 10 e—r—
personally appeared before me this a3A day of JU: °I and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements Witness my hand and official seal,
CA 4f
Q �GTAq j F�
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0
AVBI�G 2
IER CO J.
SEAL
My commission expires 1 1
j
Form SWU-102 Rev 3 99 Page 4 of 4
Hanover Design Services, P.A.
Land Surveyors, Engineers, Land Planners
September 20, 1999
SEP $ 1 1,999
Ms Linda Lewis
Environmental Engineer
N C Department of Environment
And Natural Resources
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
Re Stormwater Management Permit for
Brewster Place Phase Two
New Hanover County
HDS Project No 3888
Stormwater Project No. SW8 990732
Dear Ms Lewis
Enclosed please find the following items
- original and one (1) copy of the revised Stormwater Management Permit
Application and Wet Detention Basin Supplement for the referenced project
- one (1) copy of the revised `page 1' of the Stormwater Management
Calculations
- two (2) copies of sheets 1 through 3 entitled "Erosion and Sediment Control
and Water Quality Plan"
Responding to comments 1 and 10 in your September 13, 1999 transmittal, the total
drainage area on the site is 32 93 acres Lots 100 through 112 have already been
permitted under a previous stormwater project (SW8 960704) and should not have been
included on this application The application has been revised accordingly The forebay
volume has been adjusted to 58,705 cubic feet per comment 2 Clean -out depths now
accurately reflect the `75% of design depth' values (comment 3) Addressing comment 5,
the finalpllat will show the pond area recorded as a drainage easement The vicinity map
has been modified to show Brewster and Trsbury Lanes (comment 7) Also, a note has
been included on sheet 1 stating that all stormwater will flow to the streets or drainage
swales onsite (comment 8)
319 Walnut Street Wilmington, NC 28401 (910) 343-8002
Addressing comment 9, the outlet end of the pond has been widened and made deeper and
the middle section has been narrowed to keep the volumes and storage consistent with the
calculations Although the over -design of the pond may not nutigate the concerns with
the problem mentioned, the over -design combined with the +/- 500 LF of grassed channel
draining to the forebay (which also serves as storage) certainly compensates for this
shortcoming from a water quality perspective
Addressing comment 4, the wetlands issue is still undergoing arbitration We hope to
resolve the issue shortly and will notify you when a resolution has been reached
We request NCDENR certification of compliance of this project with stormwater
regulations Thank you for your consideration of this request Please call if you require
any additional information
Very truly yours,
Howard Resnik, EI
Encl As noted above
cc Saturn Development
State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B Hunt, Jr, Governor
Bill Holman, Secretary
Division of Water Quality
September 13, 1999
Mr Terry Turner, President
Saturn Development
3901 Oleander Drive
Wilmington, NC 28403
Ame �.q WA
RCDENK
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No SW8 990732
Brewster Place Phase II
New Hanover County
Dear Mr Turner
The Wilmington Regional Office received a Stormwater Management Permit Application for Brewster
Place Phase II on July 26, 1999 A preliminary review of that information has determined that the application
is not complete The following information is needed to continue the stormwater review
The application indicates that the percent impervious of this project is 53% If you divide 13 87
by 39 6 (project acreage), you get 35% The application also indicates that the drainage area is
53% impervious If you divide 13 87 by 32 93 (drainage area acreage), you get 42% Please
correct and revise The 13 87 acres is questionable since you have not included all 120 lots in
the summary table (See comment #10 below) You are always free to overdesign the pond,
however, please be accurate in what you report on the application
2 The forebay volume provided is deficient The minimum required forebay volume is determined
by multiplying the "Permanent Pool Volume" by 20% For this pond, a maximum of 58,705
cubic feet must be provided in the forebay As discussed in the workshop, please do not provide
more than 20% in the forebay
The cleanout benchmark depth needs to be revised The supplement currently indicates that the
pond will be allowed to be reduced to a depth of 5 5' prior to cleanout The standard is 75% of
the design depth, or 5 625' Please revise
Delineate all wetlands on site, or note on the plans that none exist
Locate the pond in a recorded access/drainage easement
Please reference the project number above on all correspondence
Please add Tisbury and/or Brewster Lane and the name of the road off of the service road, to the
vicinity map
127 Cardin d Dr Ext, Wilmington, North Carolina 28405 Telephone 910-395-3900 FAX 910-350-2004
An Equal Opportunity Affirmative Action Employer 50% recicled/10% post -consumer paper
Mr Turner
September 13, 1999
Stormwater Project No SW8 990732
Since this subdivsion exceeds low density, all runoff from all of the built -upon area on all of the
lots must be directed into the pond Usually, perimeter swales or lot grading requirements are
used to ensure that all the runoff is directed to the pond Please indicate the method of collecting
all the runoff on the plans Show Swale grading, or add a note indicating that all lots must be
graded such that they drain to the street If you do not wish to collect all the lot runoff, please
reduce the BUA per lot so that 30% density is achieved A low density supplement will be
required if you choose this option
This pond design is backwards from the model that the SA/DA ratio tables were derived Ideally,
the pond should be narrow at the inlet and gradually widen and deepen to the outlet In the
proposed pond, the area around the outlet structure is not as deep as the rest of the pond, and
may result in deficient pond functioning The over -design does not mitigate these concerns
10 You only include 107 of the 120 lots in the drainage area to the pond The total BUA for 120 lots
@4,000 square feet is 480,000, or 1102 acres The application and calculations account for only
9 83 acres Please revise, per comment #8 above
Please note that this request for additional information is in response to a preliminary review The
requested information should be received by this Office prior to October 13, 1999, or the application will be
returned as incomplete The return of a project will necessitate resubmittal of all required items, including the
application fee The Division is allowed 90 days from the receipt of a completed application to issue the permit
The construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of NCGS 143-215 1 and is subject to enforcement action
pursuant to NCGS 143-215 6A
If you have any questions concerning this matter please feel free to call me at (910) 395-3900
Sincerely,
Linda Lewis
Environmental Engineer
RSS/arl S \WQS\STORMWAT\ADDINFO\990732 SEP
1 cc Linda Lewis
David Hollis, P E
July 27, 1999
Ms Linda Lewis
Environmental Engineer
N C Department of Environment
And Natural Resources
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
Re Stormwater Management Permit for
Brewster Place Phase Two
New Hanover County
HDS Project No 3888
Dear Ms Lewis
Enclosed please find the following items
N�
RECEIVED
JUL 4 0 1999
BY:
JUL
0v1 �Z
original and one (1) copy of the completed Stormwater Management Permit
Application and Wet Detention Basin Supplement for the referenced project
$420 00 application fee
one ( l) copy of the Stormwater Management Calculations
one (1) copy of the Erosion Control Narrative and Specifications
one (1) copy of the Erosion Control Calculations
two (2) copies of sheets 1 through 3 entitled "Erosion and Sediment Control and
Water Quality Plan"
Stormwater on this project will be controlled using one (1) detention pond
We request NCDENR certification of compliance of this project with stormwater regulations
Thank you for your consideration of this request Please call if you require any additional
information
Very truly yours,
Howard Resnik, EI
Hanover Design Services, PA
Encl As noted above
cc Saturn Development
EROSION AND SEDIMENT CONTROL PLAN
BREWSTER PLACE PHASE TWO
for
SATURN DEVELOPMENT
July, 1999
NARRATIVE
NOTE To be reviewed in conjunction with "Erosion and Sediment Control Plan for
Brewster Place Phase Two", Hanover Design Services, P C , Drawing No
3888ecpHSR
PROJECT DESCRIPTION -
The purpose of this project is construction of a single-family residential
subdivision The Erosion and Sediment Control Plan is to identify measures to
be implemented to control erosion during construction of the private roads,
utilities, and land grading associated with this development
The site is located at the extension of existing Brewster and Tisbury Lanes
in the existing Brewster Place Subdivision in New Hanover County The project
is 39 63 acres in size, 33 of which are proposed to be disturbed The site is
wooded with fairly flat topography with the exception of the back portion of
the site which has been previously used as a borrow pit It is bordered on the
north and west by an existing residential development, on the south by a
construction company, and on the east by commercial property immediately
adjacent to U S Hwy 421 as shown on drawing # 3888ecpHSR
SOILS -
The soils in the project area are primarily Lynn Haven Fine, Kureb, and
Onslow Loamy Sands (Ly, Kr, and On), well drained, moderately permeable
soils, with a hydrologic classification of "B/D," "A," and "B" respectively The
primary means of stormwater transport in all areas around the site, all proposed
site improvements, and impervious areas will be directed to the proposed
pond/ basin with storm sewers and grassed swales
(Soils Map attached)
HANOVER t?ERi 3N! SERVICES, P A
319 WALNUT 8 i7REET
WILMINGTON NC td401
CONSTRUCTION SCHEDULE -
Indicated on Plan
1 Obtain approval of Plan and any necessary permits, and hold a pre -construction
conference prior to commencing any work
2 Flag work limits and stake -out roadway and Sediment Basin for preliminary
grading
3 Install Gravel Construction Entrance
4 Install Sediment Basin as shown on Plan prior to clearing and grubbing site
5 Construct ditches and any other sediment control Practices shown, prior to
rough grading site, stockpiling topsoil as necessary
6 Establish final grades and stabilize roadway areas with stone base course
7 Final grade building sites, install public and non -municipal utilities as needed,
and vegetatively stabilize areas where building construction is not imminent
8 All erosion and sediment control Practices are to be inspected weekly and after
any rainfall, and repaired as necessary
9 Upon completion of building construction, the roadway areas are to be paved
and all areas permanently vegetatively stabilized After site stabilization,
temporary measures are to be removed and the Sediment Basin cleaned to its
original design contours, if necessary, and riser structures orifices opened, so
as to function as a stormwater management / water quality retention pond
HANOVER DEs'gn' SERVICES, n A
319 WALNUT STREtT
WILMINGTON NC 2d401