HomeMy WebLinkAboutSW7060323_CURRENT PERMIT_20130520STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. I SW 7Url((%�J?"
DOC TYPE � CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE I 9�baw
YYYYMMDD
NCDENR
North Carolina Department of Environmel,t and Natural Reaourc^n
Division of ilVater Quality
Fat McCrary Charles Wakild, P. E. John E. SkvariF, ill
Governof- Director Secretary
May 20, 2013
Mr. Mark C. France
Downeast Equity Partners, LLC
110 France Ct.
Manteo, NC 27954
Subject: NOTICE OF INSPECTION
Permit No. SW7060323
Cedar Bay Subdivision
Dare County
Dear Mr. France:
On May 15, 2013, Roger Thorpe of the Washington Regional Office of the Division of Water Quality (DWQ)
inspected the Cedar Bay Subdivision Project located off California Lane in Manteo, NC to determine
compliance with Stormwater Management Permit Number SW7060323, which was issued on .Tune 26, 2006.
The DWQ site ins ection revealed that the project is in not in com liance with the approved l2ermit.
Condition II. 6. Of the permit requires that upon completion of construction and prior to operation of the
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 the permit and approved plans and
specifications. This office has no record of receiving the required certification.
Please be advised that you are required to comply with the terms, conditions and limitations of your
Stormwater Management Permit under Title 15A North Carolina Administrative Code 2H .1003 and North
Carolina General Statute 143-214.7, including operation and maintenance of your permitted stormwater
system. A designer's certification should be submitted within 30 days.
Please be advised that violations of your Stormwater Management Permit may be subject to the assessment of
civil penalties of up to $25,000 per day per violation. If you have any questions please contact me at the
Washington Regional Office, telephone number (252) 948-3923.
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Sincerely,
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Roger K. Thorpe
Environmental Engineer
Oil1
N orth Caralin
W A rFRP Michael F. Easley, Governor
Gy William G. Ross Jr,, Secretary
r North Carolina Department of Environment and Natural Resources
p Alan W. Klimek, P.E. Director
Division of Water Quality
June 26, 2006
Mr. Mark C. France
Downeast Equity Partners, LLC
110 France Ct.
Manteo, NC 27954
Subject: Permit No. SW7060323
Cedar Say Subdivision
High Density Stormwater Project
Dare County
Dear Mr. France:
The Washington Regional Office received a completed Stormwater Application for the subject project on
June 19, 2006. Staff review of the plans and specifications has determined that the project, as proposed, will comply
with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7060323
dated June 26, 2006 to Downeast Equity Partners, LLC for the construction and operation of infiltration swales to
serve Cedar Bay Subdivision located off California Lane in Manteo, NC.
This permit shall be effective from the date of issuance until June 26, 2016 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 150E of the North Carolina General Statutes,
and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such
demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact me or Roger
Thorpe at (252) 946-6481.
A,iere y` o� r
Al Hodge, Regional Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Performance Engineering
Manteo Building Inspections Department
�Ilashington Regional Office
Central Files
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943 Washington Square Mall Phone (252) 946-6481 NOrfihCarOlina
Washington, NC 27889 Fax (252) 946-9215 Naturally -
An Equal OpportunitylAfflrmative Action Employer— 50% Recycled/10% Post Consumer Paper
State Stormwater Management Systems
Permit No. SW7060323
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
Downeast Equity Partners, LLC
Cedar Bay Subdivision
Dare County
FOR THE
construction, operation and maintenance of stormwater management systems 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 for infiltration swales to serve Cedar Bay Subdivision located off California
Lane in Manteo, NC.
This permit shall be effective from the date of issuance until June 26, 2016 and shall be subject to the following
specified conditions and limitations:
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 on page 2 of
this permit, the Project Data Sheet.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
4. Each of the 41 lots in this 10.1 acre residential development is limited to a maximum square footage of built -
upon area as shown in Attachment A (East side) and Attachment B (West side) of this permit.
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Receiving Stream:
Classification of Water Body:
Total Site Area:
Drainage area Number
Drainage area to Swale system:
Impervious area in drainage basin
Infiltration Basin Depth:
Required Storage Volume:
Provided Storage Volume:
Overflow Elevation:
DIVISION OF WATER QUALITY
PROJECT DATA
Cedar Bay Subdivision
SW7060323
Dare County
Downeast Equity Partners, LLC
110 France Ct.
Manteo, NC 27954
4/24/2006 (original)
LIT to Croatan Sound
SA
10.1 ac.
# 1 East Side
# 2 West Side
3.822 ac
3.81 ac
1.82 ac
1.84 ac
1.0 ft
1.0 ft
9,969 cf
10,037 cf
20,230 cf
19,924 cf
5.08 ft
5.08 ft
4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (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.
5. 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 of the project area.
In addition, the Director may determine that other revisions to the project should require a modification to the
permit.
6. 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.
11. SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the stormwater
management system.
a, 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
The facilities must be properly maintained and operated at all times. The approved Operation and
Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals...
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency including, but not limited to:
a. Semiannual scheduled inspections (every 6 months)
b. 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.
4. 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. 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.
6. Upon completion of construction 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. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall,
Washington, North Carolina, 27889, attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of
five years from the date of the completion of construction.
Ill. GENERAL CONDITIONS
1. 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 formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, 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.
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-
215.6(a) to 143-215.6(c).
3. 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.
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 permit may be modified, revoked and reissued or terminated for cause. The fling of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
6. An application for permit renewal must be submitted at least 180 days prior the expiration of this permit along
with the appropriate processing fee.
Permit issued this the 26 th day of June, 2006.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
,sr Alan W. Klimek, P.E. Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7060323
ATTACHMENT A
Cedar Bay Subdivision (Eastside)
Lot Number Lot Area (S.F.) Allowable_ Impervious Coverage (S.F.)
1
6,626
2,518
2
6,361
2,417
3
6,332
2,406
4
6,304
2,396
5
6,276
2,385
6
6,290
2,390
7
6,261
2,379
8
6,232
2,368
9
6,438
2,466
10
6,486
2,465
11
6,322
2,402
12
6,309
2,397
13
6,477
2,461
14
6,581
2,501
15
6,776
2,575
16
6,754
2,567
17
6,483
2,464
18
6,504
2,472
19
6,493
2,467
20
6,497
2,469
21
6,957
2,644
ATTACHMENT B
Cedar Bay Subdivision (Westside)
Lot Number Lot Area (S.F.) Allowable Impervious Coverage (S.F.
22
6,842
2600
23
6,161
2,341
24
6,161
2,341
25
6,161
2,341
26
6,161
2,341
27
6,161
2,341
28
6,161
2,341
29
6,161
2,341
30
8,450
3,211
31
6,393
2,429
32
7,980
3,032
33
9,917
3,768
34
6,604
2,510
35
6,161
2,341
36
6,161
2,341
37
6,161
2,341
38
6,161
2,341
39
6,161
2,341
40
6,161
2,341
41
6,240
2,371
Cedar Bay Subdivision
Stormwater Permit No. SW7060323
Designees Certification
I, , as a duly
registered Professional Engineer in the State of North Carolina, having been authorized to observe
(periodically/weekly/full time)
the construction of the project,
for
(Project)
(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.
Signature
Registration Number
Date
Date Received
Fee Paid
Permit Number
APR 4
2006
DWQ-WARD State of North Carolina 6WACK )f/a7/0(�
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This fonri may be photocopied for use as an original
GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
LLC-
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
3. Mailing Address for person listed in item 2 above:
city: - State: zip: ?_ T S4
Telephone Number: { .L5 L ) "Al ?i SC)
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):,
5. Location of Project (street address):
city: _I ' 1--Q - County:_ r�-
6. Directions to project (from nearest major intersection):
7. Latitude:AL3�4' -S A . S?QZ Longitude:VJ —15' 4 Z) , L6 1 of project
S. Contact person who can answer questions about the project:
Name: 0-Y:t 4&�0,w f Telephone Number: -( 7 r,-L4-q k' Z I S4
•y
Il. PERMIT INFORMATION: /
1. Specify whether project is (check one): ./ New Renewal Modification
Dorm SWU-101 Version 3.99 Page 1 of 4
Y
permit, list the
2. If this application is being submitted as the result of a renewal -or mo{dification to an' existing
existing permit number _ and its45sne date (if Mn)" A!.�
3.. Specify the type of project (check one):
Low Density High Density Redevelop General Pernut Other
4. Additional Project Requ'rements (check applicable blanks):
CAMA Major Sedimentation/Erosion Control Y4041401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ill. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one totwopages) describing stormwater management for the pr,,Ject .
�
�i'�=ice%FAY �,��• ;11 !l,a r.� �jbl_r7Y$�1
2. Stormwater runoff from this project drains to the P of S q t.'ot anx. River basin.*
3. Total Project Area:_ ] ,G �2) acres 4. Project.Budt Upon Area: %
WrT�.: TOTAL TkALT = 1e• t AC-
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.
- �A- inr Pu i /1 l AwtZ~� ^LCIL'�Y �11\G tI J_A"S:`
Basic Inforfnation $3'
I7rautage Area#1 s "
w,Drarnage Area 2
Receiving Stream Name
r
[
Receiving Stream Class
Alb- -
,, r
Drainage Area
33
Existing Impervious* Area
•
Proposed Impervious*Area
3 S.F
%
% Impervious* Area (total)
Irrii en ious*tStirface Area
_ ., I?rainage Area
M.
Ura rage :
On -site Buildings
— 61 S.F
a2 /9 ' $ �•
On -site Streets
n c ,F
On -site Parking '
On -site Sidewalks
Other on -site
Off -site
Total: 7 r. 3 r
Total: -79 962 c• ,
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWi1-101 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.
The following covetwnts 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 clurnged or deleted without the consent of the State.
2. No more than - _ 1 L' _ nffaM*t+of any lot shall be covered by strrtctures 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. Srvales 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 states tor7n water management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development s)wll be directed into the permitted stormwater control
system. These connections to the stormwater control syslern 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 willrun 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 subrrutted,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
UndergroLind Infiltration Trench Supplement ,
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement s
f
Form SWU-101 Version 3.99 Page 3 of 4
V1. SUBMITTAL REQUIREMENTS •' -
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DIVA).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DIVQ 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 cope of the Stormwater Management Permit Application Form 5
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR) AS—
• Detailed narrative description of stormwater treatment/management S
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
ti Legend
v- North arrow -
�,- Scale
v- Revision number & date
"IN - Mean lugh water line
- Dimensioned. erty/project boundary
ti - Location map with named streets or NCSR numbers
N - Original contours, proposed contours, spot elevations, finished floor elevations
�. Details of roads, drainage features, collection systems, and stonnwater control measures
Wetlands delineated, or a note on plans that none exist
ti- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
--4- Drainage areas delineated
WN - 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, please complete this section.
Designated agent (individual or firm):. R 0. _zi,`S4- �L��
Mailing Address:
City: pa\w2 1 1aY> - State: L Zip: 7_ 19 V,
Phone: Fax: ( 7_5
VIII. APPLICANT'S CERTIFICATION-
1, (print or type nanze of person 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 e constmcted in conformance with the approved plans, that the required deed restrictions
and protective�Qo� �ants/���illkfe recorded', and that the proposed project complies with the requirements of 15A
NCAC 2H .1 I 1 /�
Signature: Date: 6-
Form SWU-101 Version 3.99 Page 4 of 4
Permit No.
(to be provided by DW&
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FOAM
INFILTRATION BASIN SUPPLEMENT APR 2 4 2006
This form may be photocopied for rise as an original
DWQ®11UQ-
_Stormwater Management Plan Review: .WAR®
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name . C. ED A k ?,AY
Contact Person: iZob e-c( Si rt �.�� _ Phone Number: Ur, L ) 4!) 1 ri
This worksheet applies to: Basin No. I in Drainage Area i EAST SIT& rAQvtiuAtli%A�_
(as identified an plans) (fru Farm SWU-101)
II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable
source of soils information. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type �lnfi i r\d to -a IAt. 5ard5 �I.�,,�So6,s,gaymaak 1cart'21)
Infiltration Rate _ 1� �_ in/hr ref/hr/sf (circle appropriate units)
SHWT Elevation 2 . fmsl (Seasonal High Water Table elevation)
Basin Design Parameters
Design Storm �� inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume _____ c.f.
Drawdown Time O . lb days (9-Z hr's)
Basin Dimensions
r
Basin Size S.S ft. x 6,316 ft. = 13, e? 90 —sq. ft. (bottorre dimensions)
Basin Volume Provided,1Z 30 c.f.
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
¢. d 8 fmsl
S.08 fmsI
,. Z fmsl
Fornr SWU-103 Rev 3.99 Page I of 3
Ill. REQUIRED ITE"NIS CHECKLIST
r
t
The following checklist outlines design requirements per the Storrnwater Best Management Practices Manual
(N.C. Department of Environment, hleallh and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 214 .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant hers designated an agent in the Storrnwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been rr►et.
Applicants Initials
re4s a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
r b. System is located at least 100 feet from water supply wells.
Bottom of system is at,least 2 feet above the seasonal high water table.
e 5 d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
e. F Sysiern is not sited on or in fill material or DWQ approval has been obtained.
pitrrnEl3sS tc t f.
System is located in a recorded clrainrage easement for tlre,purposes of; operation and
,,
iv€"1\t+S1cpJ t,dr,
maintenance and has recorded access easements to the nearest public riglit,of-way.y
R CA 5 g.
YJ
Drainage area for the device is less than 5 acres.
Sails have a minimum hydraulic conductivity of,0.52 inches per hour and soils report is
U.`— ;
.�t. .
i'.'
"` Systeru 'c ptures and infiltrates the runoff from the first I.0 inch of rainfall (1.5si'nch event
+: •'
for areas draining to SA waters). Design volume and infiltration calculations attached.
j.
System is sized to take into account the runoff at the ultimate built -out potential -front all
surfaces draining to the system, including any off -site drainage. Calculations attached.
. -k.
"All'side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
See Mnttt~ATWL W L
A pretreatment device such as a catch basin, grease trap,'filt`er,stnp, grassed Swale or
V L64s Va. rJES rmo-. i
-sediment trap is provided.
rn.
Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
n.
Vegetated filter is provided for overflow and detail is shown'on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters). -
N 1A o.
Flow distribution mechanism withinjlie basin is provided..
p.
A benchmark is provided to determine the sediment accumulation in the pretreatment.
device.
s q.
Runoff in excess of the design volume bypasses off-line systems (bypass detail'provided).
Le r.
System is designed to draw down (lie design storage volduie,to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and'all
pertinent draw -down calculations are attached.
s. Plans ensure that the installed system will nieet design spec ifications "(construtted or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
Foam SWU-103 Rev 3.99 Page 2 of 3 -
3 4
IV. INFILTRATION BASIN OPCRATION AND MAINTENANCE AGREEMENT
I, After every runoff producing rainfall event and at least monthly inspect the infiltration system for erosion,
trash accumulation, vegetative cover, And general condition..
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved
design specifications.
a. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when
depth in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored
to the original design depth without over -excavating. Over -excavating may cause the required water
table separation to be reduced and may compromise the ability of the system to perform as designed.
Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner
that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
ctc).
A benchmark shall be established in the pretrearment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads 4.33� feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration hasin.
5, if the Division determines that the system is failing, the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other siormwater
control devices as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
maintenance procedures listed alcove. I agree to notify D'1 Q of any problems with the system or prior to any
changes to the system or responsible party.
Print Name and Title: d hC ..�,. -a Ir\ ;q in CA-( �Ae ,(
Address:_/D Ft'r3717CE /�/�'P.�] 7
Phone: Date: 0 v
Signature: -
Note: The legaNy responsible parry.Thou nor be a homeowners associeshon unless more than 30% of the Tors have been sold and
a resident of the subdivision has 6een named the preriderrr.
Faith A. Newman , a Notary Public for the State of North CarolingCounty of
Dare -,do hereby certify that __ Mark C. France __ personaliy appeared before the this _21st
day of AT) ri ,-QQfi , And acknowledge the due execution of the forgoing inrittration basin maintenance
requirements. Witneis my hand and official seal,
SEAL .00. s My commisslon expires I Ch 23, 2 Q9
Form S W u- I (13 ac$ 3,9 Page 3 of 3
s G PU®L%G
00
�r��14I4ti41SY1t
CEDAR BAY SUBDIVISION- STORM WATER BMP DESIGN CALCULATIONS
DRAINAGE AREA 1, ARVILLA LANE, EAST SIDE OF SR 1129
I. TOTAL TRIBUTARY AREA 166,380 S.F. (3.82 AC.)
I1. IMPERVIOUS AREAS: ASPHALT PAVEMENT- 21,779 S.F. (INCLUDING
FUTURE PAVING OF UNNAMED STREET)
CONCRETE SIDEWALKS 5,643 S.F.
DRIVEWAYS 380 S.F. ( BETWEEN E.O.P. AND
SIDEWALK, 10' X 2' 19 DRIVEWAYS)
LOT COVERAGE: (SEE ATTACHED TABULATION)
TOTAL AREA OF LOTS 1-21 = 135,759 SF
AT 38% AS LIMITED BY TOWN OF MANTEO
ORDINANCE, COVERAGE = 51,609 S.F.
TOTAL IMPERVIOUS COVERAGE = 79,411 S.F. (48%)
III. ANTICIPATED RUN-OFF VOLUME, USING SCHULER SIMPLE METHOD
Rv = 0.05 X 0.009(48%) = .48 INCHES PER INCH
DESIGN VOLUME FOR 3" STORM EVENT = 166,380 S.F. (3.0"I12)(.48)
19,966 C.F.
IV. BASIN CAPACITY:
A. ROADSIDE SWALES- 1,340 L.F. X 8.5 C.F./L.F. = 11,390 C.F.
B. SIDE LOT LINE SWALES- I X 65 L.F. EACH X 8.5 C.F./L.F. = 8,840 C.F.
C. TOTAL STORAGE VOLUME = 20,230 C.F.
V. DRAWDOWN TIME
A. USING DATA TAKEN FROM THE U.S.D.A., S.C.S., SOIL SURVEY OFDARE
COUNTYNORTH CAROLINA, TABLE 16, PP.96-97, THE MOST LIMITING
PERMEABILITY RANGE FOR THE IN SITU SOIL TYPES IS 0.6 — 2.0 IN./HR. THE
MIDRANGE VALUE OF 1.3 IN./HR. IS USED TO EVALUATE THE ANTICIPATED
DRAWDOWN TIME. THE ROADSIDE AND LOT LINE SWALES, FILLED TO THE
DESIGN CAPACITY ARE 12' DEEP. IT FOLLOWS THAT THE REQUIRED
DRAWDOWN TIME WILL BE 12"/1.3 IN./HR. = 9.2;HRS. (0.38 DAYS)
4. p�Esslp :
-: Q P�EE ' .
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8604 CARATOKE HIGHWAY
POWELLS POINT, NC 27966
PHONE 252-491-8354 FAX 252-491-5112
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Permit No.
(to be provided by DW&
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FOR I-
INFILTRATION BASIN SUPPLEMENT APR 2 4 2006
This form ruaJ be photocopiedfor use as an original k�' +�Af p
®tf ltQ'4lH�R®
DW Stormwater Management Plan Review_
A complete stormwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations, soils report and plans and specifications
showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : C bA►2,
Contact Person: `lob P_✓ew a f Phone Number: (7,S2
This worksheet applies to: Basin No. i in Drainage Area Slt f_' L11aD%10 W-
(ac identified on plans) (from Form SIVU•101 ) '
II. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable
source of soils information. All elevations shall be in feet mean sea level (fmsl).
Soils Report Summary
Soil Type 1o�my �r�. S S C�.aoe, , r+5 � $2ym�.��e �CZ'(.ti a)
Infiltration Rate 1- 2, in/hr r cf/hr/sf (circle appropriate units)
SI WT Elevation I, If fmsl (Seasonal High Water Table elevation)
Basin Design Parameters
Design Storm 3 inch (1.5 inch event for SA waters, I inch event for others)
Design Volume c.f.
Drawdown Time O . 3 days (9 ..Z
Basin Dimensions
Basin Size �5. 5 ' ft. x {' w ` a.50 ft. = Z sq. ft. (bottom dimensions)
Basin Volume Provided ITQ c.f.
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
.a fmsl
5208, fmsl
a_ Z fins]
Form SWU-103 Rev 3.99 Page 1 of 3
Ill. REQUIRED 11"E' is CHECKLIST
The following checklist outlines design requirements per the Stormwater Hest Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 214 .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
docurnentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application,Forni, the"agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
a.
b.
SEE w,&(ZkATNF_
S e.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
System is located at least 100 feet from water supply wells.
Bottom of system is at least 2 feet above the seasonal high water table.
Bottom of the system is 3 feet above any bedrock or impervious soil Horizon.
System is not sited on or in fill material or DWQ approval has been obtained.
F_ASt.18=rr f. System is located in a recorded drainage easement for the purposes of operation and
ZECrILDILb"_M maintenance and has recorded access easements to the nearest public right-of-way.
Isu3Dwr5iC,4 PL-6
g. Drainage area for the device is less than 5 acres.
It. Soils have a rnininrurn hydraulic conductivity of 0.52 inches per liour and soils report is
attached.
SCc 4A9_cu&Z9Lg_01.
flti.4�tS �� R 4t~SC.2� 4 i� CrJ
S is►V_ rA
rn.
n
M ��
q
System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event
for areas draining to SA waters ). Design volume and infiltration calculations attached.
System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided. -
Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches
or dense vegetative cover is provided.
Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
Flow distribution mechanism within the basin is provided.
A benchmark is provided to determine the sedimentaccumulation in the pretreatment
device.
Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
System is designed to draw down the design storage`volumesto the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and all
pertinent draw -down calculations are attached.
2C_ _ s. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized. ,
Form SWU-103 Rev 3.99 Page 2 of 3
TV. INFILTRATION BASIN 011L:RATION AND MAINTENANCE AGRt?1: MENt'
I. After every ninoff producing rainfall event And at least monthly inspect the infiltration system fore ros I oil,
trash accumulation, vegetative cover, and general condition,
2. Repair eroded areas immediately, rc-seed as necessary to maintain adequate vegetative cover, maw
vegetated cover to maintain a maximum height of six incites, and remove trash as needed.
3. After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage. and deterioration, Remove any blockage and repair the structure to approved
design specifications.
4. Remove acetttnulated sediment front the pretreatment systern and infiltration basin annually or when
dept; in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored
to (lie original design depth without over -excavating. Over -excavating may cause the required water
table separation to be reduced and may compromise the ability of the system to perform as designed.
Removed sediment shall be disposed of in an appropriate manner and shall not be handled in u manner
that will adversely impact water quality (i.e. stockpiling near a stormwatcr treatment device or stream,
ctc.).
A benchmark shall be established in the Pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used
to determine the depth at the benchmark shall bt; such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads 4.33 feet in the pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
S. If the Division determines that the system is failing, the symm will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other storrnwater
control devices as allowed by NCAC 2H ,14h4 must be designed, approved and constructed.
1 acknowledge and agree by my signature below that I am responsible for the performance of the five
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.
('tint Name and Title: � .,�� 3h �--r...M.2at-Ao PA'LIOf- _
Address. ie A ZiC ,
Phone, .-i i��,.._..� Date: 0
Signature:' ez
✓=����.`
Nate: The legally responrWe party sh
a residerir of the satdivision has
Faith A. Newman
r:or be a honarowner.i aTsociamyn unless more than -50% r;f Me furs have beer. sold and
canned the pre Went.
, a Not,uy Public far the Slate of. North CarolinaCounry of
Dare _,, do hereby cenity that ___mark C. France _ p_rsonaliy appeared before the this _21st
day of April,__, 2-M6--, and a:t:n! wicdge the due execution or the forgoing infiluation basir maintenance
requireinerztS, �1/l:f _i5 M !iand -,ind ofiicki) st-:!t
0��. M Commission ex ires M rch 23, 2QO
5E?�f. �a5a�4 �o �(�'� �,Y P s�
Form SwtJ-103 Rc 43.9 Page 3 of 3
PUBS 4
O •�� N 7 v
i. �
CEDAR BAY SUBDIVISION- STORM WATER BMP DESIGN CALCULATIONS
DRAINAGE AREA 2; LINDSEY LANE, WEST SIDE OF SR 1129
TOTAL TRIBUTARY AREA 165,843 S.F. (3.81 AC.)
II. IMPERVIOUS AREAS: ASPHALT PAVEMENT- 21,941 S.F.
CONCRETE SIDEWALKS 5,428 S.F.
DRIVEWAYS 400 S.F. ( BETWEEN E.O.P. AND
SIDEWALK, I O' X 2' 20 DRIVEWAYS)
LOT COVERAGE: (SEE ATTACHED TABULATION)
TOTAL AREA OF LOTS 22-41 = 132,519 SF
AT 38% AS LIMITED BY TOWN OF MANTEO
ORDINANCE, COVERAGE = 50,354 S.F.
TOTAL IMPERVIOUS COVERAGE = 78,123 S.F. (47%)
III. ANTICIPATED RUN-OFF VOLUME, USING SCHULER SIMPLE METHOD
Rv = 0.05 X 0.009(47%) = .47 INCHES PER INCH
DESIGN VOLUME FOR 3" STORM EVENT = 165,843 S.F. (3.0"/12)(.47) _
19,487 C.F.
IV. BASIN CAPACITY:
A. ROADSIDE SWALES- 1,256 L.F. X 8.5 C.F./L.F. = 10,676 C.F.
B. SIDE LOT LINE SWALES- 16 X 68 L.F. EACH X 8.5 C.F./L.F. = 9,248 C.F.
C. TOTAL STORAGE VOLUME =19,924 C.F.
V. DRAWDOWN TIME
A. USING DATA TAKEN FROM THE U.S.D.A., S.C.S., SOIL SURVEY OF DARE
COUNTYNORTHCAROLINA, TABLE 16, PP.96-97, THE MOST LIMITING
PERMEABILITY RANGE FOR THE IN SITU SOIL TYPES IS 0.6 — 2.0 IN./HR. THE
MIDRANGE VALUE OF 1.3 IN./HR. IS USED TO EVALUATE THE ANTICIPATED
DRAWDOWN TIME. THE ROADSIDE AND LOT LINE SWALES, FILLED TO THE
DESIGN CAPACITY ARE 12' DEEP. IT FOLLOWS THAT THE REQUIRED
DRAWDOWN TIME WILL BE 12"/1.3 IN./HR. = 9.2 HRS. (0.38 DAYS)
CARQ��,,��
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ST�C
PERFORMANCE ENGINEERING
8604 CARATOKE HIGHWAY
POWELLS POINT, NC 27966
PHONE 252-491-8354 FAX 252-491-5112