HomeMy WebLinkAboutSW7050606_CURRENT PERMIT_20050908STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPECURRENT
PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
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YYYYMMDD
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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
DIVISION OF WATER QUALITY
September 8, 2005
Nags Head Church, Inc.
Attn: Mr. Bruce Copeland
PO Box 302
Nags Head, NC 27959
Subject:
Dear Mr. Copeland:
Alan W. Klimek, P.E. Director
Division of Water Quality
Stormwater Permit No. SW7050606
Nags Head Church
High Density Stormwater Project
Dare County
The Washington Regional Office received your completed
Stormwater Application for the subject project on August 8, 2005.
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. SW7050606 dated September 8; 2005 to Nags
Head Church, Inc.
This permit shall be effective from the date of issuance
until September 8, 2015 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
ddjudicatory 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.
North Carolina Division of Water Quality Internet: h2c.enr,state.nc.us
943 Washington Square Mall Phone; 252-946-6481
Washington, NC 27889 FAX 252-946-9215
An Equal OpportunitylAffirmadve Action Employer— 50% Recycled110% Post Consumer Paper
Nne
orthCarolina
Naturally
Nags Head Church, Inc.
September 8, 2005
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Mr. Bill Moore at (252)948--
3919.
Acerel ,
L
Al Hodge, R al upervisor
Surface Water Protection Section
Washington Regional Office
cc: Albemarle & Associates
Town of Nags Head Planning/Inspections
ti/WARO Stormwater Files
Central Files
State Stormwater Management Systems
Permit No. SW7050606
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
Nags Head Church, Inc.
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
(2) infiltration basins to serve Nags Head Church located off
Sound Side Road at Nags Head, NC.
This permit shall be effective from the date of issuance until
September 8, 2015, 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 on page 4 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.
3
DIVISION OF WATER QUALITY
PROJECT DATA
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater
Runoff:
Classification of Water Body:
Total Site Area:
Total Impervious
Surfaces Allowed:
Basin Depths:
Required Storage Volume:
Provided Storage Volume:
Provided Surface Area:
Storage Elevations:
R
Nags Head Church
SW7050606
Dare County
Nags Head Church, Inc.
PO Box 302
Nags Head, NC 27959
06/06/2005
UT -Roanoke Sound
SA
2.43 acres
1.08 acres
1.75 - Basin 1
1.25 - Basin 2
3410 cf - Basin 1
3126 cf - Basin 2
3540 cf - Basin 1
3212 cf - Basin 2
3959 sf - Basin 1
3518 sf -- Basin 2
5.33 ft - Basin 1
5.58 ft - Basin 2
n
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 site
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.
II. SCHEDULE OF COMPLIANCE
I. 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.
2. 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:
5
if
a. Semi-annual 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.
III. 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
,oapplication 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 14.3-215.6(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.
6
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 filing of a request for a permit
modification, revocation and reissuance or termination does
not stay any permit condition.
Permit issued this the 8 th day of September, 2005.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. li DirectorJ
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7050606
7
Stormwater Permit SW7050606
(2) Infiltration Basins
Nags Head Church, Sound Side Road
Nags Head, NC
Designer's Certification
I,
as a duly 0
registered Professional Engineer 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.
Signature
Registration Number
Date
3
Stormwater'Permit SW7050606
(2) Infiltration Basins
Nags Head Church, Sound Side Road
Nags Head, NC
Designer's Certification
r, Jo"A.) W.`_�Ljcm , as a duly
registered Professional Engineer in the State of North Carolina.,
havina been authorized to observe (periodically/weeIJI-c
full time)
the construction of the project, IJA ged
. (Project)
1
for 9trA1 (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 then gent truction was o erved to be built within
substantial complice and i of the approved plans and
specifications. 11.
Signature —1 f
'U
Registration Jer SEAL
Date
4
n
M.
i
0
I
lbemarle
& ASSOCIATES, LTD.
May 9, 2007
North Carolina Department of Environment and Natural Resources/Uht
Washington Regional Office
943 Washington Square Mall
Washington, NC 27889
ATTN: Scott Vinson
RE: Stormwater Permit SW7050606
Nags Head Church, Sound Side Road, Nags Head, Dare County, NC
Dear Mr. Vinson:
Please find enclosed the Stormwater Permit Designer's Certification. Based upon this
review, I find that this facility was constructed in substantial compliance with the plans
that were approved by the State.
If I can provide any additional information, please do not hesitate to call.
Sin(*rely,
btTh M. DeLucia, PE
rinciple Engineer
Enc.
JMDlarm
cc: File 7356A
Client
Engineering — Surveying -- Land Planning
P.O. Sox 3969, 115 W. Saint Clair St., Kill Devil Hills, NC 27948
Telephone: 252-441-2113 Fax: 252-441-0965
State of North Carolina
i� Department of Environmental and Natural Resources
�"`�°'r � Division of Water Quality
OFFICE USE: ONLY
Date Received i Fee Paid Permit Number
SOCK &/11/0-5-
JUN 0 6 2005 STORMWATER MANAGEMENT PERMIT APPLICATION FORM 11
This form may be photocopied for use as an original ` h / /•r��S7�y�
We- All
1. GENERAL INFORMATION
ga t
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Nags Head Church, Inc.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Mr. Bruce Copeland. Buildina Team Leader
3. Mailing Address for person listed in item 2 above:
P.O. Box 302
City: Nags Head State: NC Zip: 27959
Telephone Number: 252441-7548
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Nags Head Church
5. Location of Project (street address):
105 Sound Side Road
City: Nags Head County: Dare
6. Directions to project (from nearest major intersection):
From the intersection of US158 and US64 proceed 3.9 miles to the north to Sound Side Road. Turn west on
Sound Side Road. site is on the left.
7. Latitude: 35' 57.44'N Longitude: 75' 37.59'W
8. Contact person who can answer questions about the project:
Name: Mr. Jared L. Madewell, PE Telephone Number:
If. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal
Form SWU-101 Version 3.99 Page I of
of project
252) 1-21 13
Modification
I Ki
1
i
i
,• r
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 X Redevelop General Permit _ Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control 404/401 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 to two pages) describing stormwater management for the project.
The existing stormwater management basin will continue to be used for Drainage Area 1. A new infiltration
basin will be constructe d on the west side of the property for Drainage Area 2. An overflow bypass device will
be built to bypass runoff above 2" into an adjacent conveyance ditch.
2. Stormwater runoff from this project drains to the Pasquotank River basin.
3. Total Project Area: 2.4 Acres 4. Project Built Upon Area
5. How many drainage areas does the project have? 2
44.4 %
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
See Attached Sheet
See Attached Sheet
Receiving Stream Class
Drainage Area
Existing Impervious* Area
Proposed Impervious* Area
% Impervious* Area (total)
Impervious* Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings
See Attached Sheet
See Attached Sheet
On -site Streets
On -site Parking
On -site Sidewalks
Other on -site
Off -site
Total:
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 offsite 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 covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
Changed or deleted without the consent of the State.
2, No more than _ square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, hrick. stone, slate, or similar material but do not include wood
decking or the water surface of swimming pools.
3. .Swales shall not he felled 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 runofffrom outparcels orfuture development shall he directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form S W U-101 Version 3.99 Page 3 of 4
V1. SUBMITTAL REQUIRMENTS
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 he
Submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form X
• One copy of the applicable Supplement Form (s) for each BMP X
• Permit application processing fee of$420 (payable to NCDENR) X
• Detailed narrative description of stormwater treatment/management X
• Two copies of plans and specifications, including: X
- 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 AUTORIZATION
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 of firm): Albemarle & Associates, Ltd. - Mr. Jared L. Madewell, PE
Mailing Address: P.O. Box 3989, 115 West St. Clair Street
City
Kill Devil Hills
State: NC Zim 27948
Phone: (252)441-2113 Fax: (252)441-0965
Vill. APPLICANT'S CERTIFICATION
I, (print or type name ofperson listed in General Information, item 2) Mr. Bruce Copeland
Certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H.1000.
Signature:_ _ Date: k a
Farm SWU-l0l Version 3.99 Page 4 of 4
DRAINAGE AREAS
for the
NAGS HEAD CHURCH
Basin`Inforiilatibna,?�� v?; Yti a;F
` D�air a e'Area;1:
# Drains e�Areat2 k;
Receiving Stream Name
Roanoke Sound
Roanoke Sound
Receiving Stream Class
HQW
HQW
s
(Ac)
(s
Ac
Drainage Area
61,400
1.41
44,617
1.02
Existing Impervious Area
28,603
0.66
1,401
0.03
Proposed Impervious Area
24,785
0.57
22,299
0.51
% Impervious Area
40.4%
50.0%
lm 'eNious'�Surface"Area`sw
.
-' ;Drama a Area 1; .'
;Draina
a Area 2t
On -Site Buildings
0
0,00
10,288
0.24
On -Site Streets
0
0.00
0
0.00
On -Site Parking
21,704
0.50
11,094
0.25
On -Site Sidewalks
3,081
0.07
917
0.02
Other On -Site
0
0.00
0
0.00
Off -Site
0
0.00
0
0.00
Total:
24,785
0.57
22,299
0.51
Site Area 2.43 AC
Existing Coverage 28.3%
Proposed Coverage 44.4%
r,o b
JUN 0 6 20J5
DWQ-WARQ
Prepared by Albemarle & Associates, Ltd. 5/26/2005
STORMWATER NARRATIVE
for the
NAGS HEAD CHURCH
in
NAGS HEAD, NORTH CAROLINA
RECEOVED
JUN 0 6 2005
OWQ-WARO
The congregation of the Nags Head Church intends to construct a new church on a site with an existing
structure that will be removed upon completion of the new structure. The proposed church has a footprint
of 10,040 SF.
The site is located on 2.43 acres on the southwest corner of the intersection of Sound Side Road and
US158. A portion of the site is currently developed with a structure containing a chapel, administrative
offices, classrooms, concrete parking, and sidewalks.
The site is reasonably level with trees on the undeveloped portion of the property. The Soil Survey for
Dare County has mapped the soils to consist of NuC (Newhan-Urban) and NhC (Newhan-Corolla) with
the majority of the site being Newhan-Corolla. Both complexes are characterized by very rapid
permeability with rates in excess of 20 inches per hour. Elevations range from just under 2.0 MSL to
approximately 7.0 MSL. The lowest elevations that are not part of an existing stormwater management
device are around 4.0 MSL. Overall coverage for the site is 44.4%.
There are two (2) drainage areas. The Town of Nags Head requires that the site manage the stormwater
runoff from a 2" storm event which exceeds the required 1.5" for SA waters. Drainage area I includes
the eastern one-half of the site. It consists of all of the existing parking and sidewalk and a small portion
of the new parking and sidewalk. Coverage for Drainage Area I is being reduced from its current state.
Drainage Area 2, to the west, includes the new church and the majority of the new parking. Runoff from
Drainage Area 1 currently enters an infiltration basin where it infiltrates into the soil. Excess runoff
overflow5Ahrough a devic an existing NCDOT conveygaojiLch adjacent to the basin. Upon
I 'on of the project and a resulting reduction in coverage, the basin in Dra' e Area I.Lvill manage
3.5 inches f rainfall through storage and infiltration. The basin is managing stormwater very well and
t e a orementioned reduction in coverage will benefit its oterat' n. A ictu is included of the basin
showing its existing vegetated state and overflow device. infiltration basi will be installed in the
western portion of the site for Drainage Area 2. Roof runoff will be conveyed to the basin via building
gutters and buried pipes. Sidewalk and parking runoff ill sheet flow to the in. The resu[tin la out
of Infiltration Bain 2 results in the management of a 3" rain event through storage an infiltratio . A
by a ill be con cted on the sou a asm so that excess runoff is erected to a
relocated portion of the D T conveyance ditch adjacent to the swale.
A soil boring was taken to estimate the depth to the water table in the vicinity of the proposed infiltration
area. The boring was representative of the Newhan-Urban complex. The depth to the water table
determined thr this boring was 42" below the existing grade, which would equate to an elevation at
approximate) 3.5' SL.
\� Ht yCA I?
says z� E
Prepared by Albemarle & Associates, Ltd 5/27/2005
ti
STORMWATF R CALCULATIONS
for the
NAGS HEAD CHURCH
Stormwater Drainage Ar #1 xisting Parking and Portion of Proposed Parking and Sidewalk)
Drainage Area 61,400 sf = 1.41 ac
Sbf FACE AREA INFORMATION
C.A,-is*_,'
Sidewalks (Existing)
0.95
1,784
1,695
Sidewalks (Proposed)
0.95
1,297
1,232
Pavement (Existing)
0,95
20,182
19,173
Pavement (Proposed)
0.95
1,522
1,446
Building
1.00
0
0
Total Impervious
24,785
23,546ry
Stoririwiiter;Mariii�ement'Area's"�;_' ''�:
CoValue+:,:"`µ;NksArea{L':,.�::'��.C',!A:'°e.
Infiltration Basin
1,00
2,960
2,960
/2,960
Total Stormwaler Management Area
2,960
Total Contributing Area
27,745
26,506
Infiltration Basin Characteristics
0����f
0299 f
'Ofll i,1 MAW \V"
70
9.
IRV
Stormwater Management 1"
1.5"
2.1
3.5"
Intensity (in./hr)
0.5
0.75
1.0
1.75
Runoff (cfs)
0.30
0.46
0.61
1.06
2-1-lour Runoff Volume (cf)
2,191
^ 3,286
4,381
7,667
Pond Storage Volume (cf)
2,889
2,888
2,888
2,888
Pond/Swale Infiltration Volume (cf)drw-� ?
4,933
4,933
4,933
4,933
Void Volume Under Pond (cf)
0
0
D
0
Total Stormwater Managed (el)
7,821
+ 7,821
7,821
7,821
Percent Retained
357%
238%
179%
102%
* Stormwater falling upon the drainfield and perimeter areas with greater than two feet separation
excluded from calculations due to the porosity of existing conditions.
*" - based on two hour infiltration rate.
Prepared by Albemarle & Associates, Ltd.
5/26/2005
STORMWATER CALCULATIONS
for the
NAGS HEAD CHURCH
Stormwater Drainage Are #2 Proposed Building, Sidewalk, and Parking)
Drainage Area 44,6I7 sf =
1.02 ac
SURFACE AREA INFORMATION
ImprenousSurfact ,a.-._•�„-,,.n::_sti� ,,,�y.,.
s:C,Valut,s"rx.�zAi'ea.�.-.,.:_.c�"iC,Ax4't,..,,
0.95 0 0
Sidewalks (Existing)
Sidewalks (Proposed)
0.95 917 71
Pavement (Existing)
0.95 0 0
Pavement (Proposed)
Building
0,539
1.00 10,2880,288
0.95 11,094/21,698
Total Impervious Area
22,299
Infiltration Basin
Loo 2,841
12,841
Total Stormwater Managemeot Area
2,841 2,841
Total Contributing Ar�
25,140 24,539
Infiltration Basin Characteristics
ox� ICAR O�"/
A
Stormwater Management
I !, Is.
2"
3"
Intensity (in./hr)
0.5
0.75
1.0
1.5
Runoff (cfs)
0,28
`
0.42
0.56
0.85
2-Flour Runoff Volume (ct)
2,0281
3,042
4,056
6,084
Pond Storage Volume (cf) ,7
2,390
:2,390
2,390
2,390
Pond/Swale infiltration Volume r
4,735
--} 4,735
4,735
4,735
Void Volume Under Pond (ef)
0
\0
0
0
Total Stormwater Managed (co
7,125
7,125
7,125
7,125
Percent Retained
351%
234%
176%
117%
' - Stormwater falling upon the drainfield and perimeter areas with greater than two feet separation
excluded from calculations due to the porosity of existing conditions.
- based on Iwo hour infiltration rate.
Z6 7/
.r Z 39v
CT
ARediA
Preapred by Albemarle & Associates, Ltd. 5/26/2005
Soil Boring
for
Nags Head Church
Soil Boring
depth
-1
0" - 2"
root mat
2„ -12"
dry fine brown
sand
12" - 30"
tan slightly
moist fine sand
slightly moist
30" - 33"
coarse reddish
brown sand
moist fine sand
33" - 42"
wl woody
organics
>42„
wet fine sand wl
woody organics
Depth to Water
Table
35
Surface Elev 6.00
Appx. WT Elev 2.50
Albemarle & Associates, Ltd.
6/3/2005
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lbemarle
& ASSOCIATES, LTD.
June 3, 2005
NCDENR Land Quality Section
943 Washington Square Mall
Washington, NC 27889
ATTN: Mr. William Moore, PE
RE: The Nags Head Church
Dear Mr. Moore:
RECE 11V L,
JUN 0 6 2005
DWQ-WARO
Please find the enclosed Stormwater Management submittal for the Nags Head Church.
The owner intends to begin construction on the site in the fall of 2005. The project is a
redevelopment of an existing religious complex. The owner intends to renovate the site
by constructing a new building and installing new pavement to supplement existing
parking.
The existing site currently has stormwater management as discussed in the enclosed
narrative. We are proposing to manage stormwater through two (2) infiltration basins,
one (1). existing and one (1) proposed. The site has an outlet that is tied by swales to
an existing outfall into the Roanoke Sound.
Enclosed with this submittal are the Grading and Drainage Plans, applicable application
forms, fee, and supporting data and calculations for this work. Please do not hesitate to
call me if you have any comments or questions regarding this project.
Sincerely,
Jared L. Madewell, PE
Project Engineer
Attachments
cc: File
Nags Head Church
Cahoon & Kasten Architects (Ltr. Only)
Engineering — Surveying — Land Planning
P.O. Box 3989, 115 W. Saint Clair St., Kill Devil Hills, NC 27948
Telephone: 252-441-2113 Fax: 252-441-0965
The Nags Head Church LR ECE0E.L)
Stormwater Management Application JUN 0 6 2005
Infiltration Basin Supplement Attachment
Drainage Areas 1 and 2 DWQ_WARO
Infiltration Basins 1 and 2
Section 11— Design Information
Soils Report Summary — The Soil Survey for Dare County has established
infiltration rates for Ncwhan-Urban and Newhan-Corolla soil types to be z20
inches per hour. The infiltration rate used, with a factor of safety of 2, was 10
inches per hour. The seasonal high ground water elevation is based upon one (1)
boring and field observation.
Section III — Required Items Checklist
Basin I and Basin 2
f. The basins are located immediately adjacent to a concrete parking area to
facilitate accessibility and maintenance. Access to the parking areas is achieved off
public -rights -way.
Basin I
1. All of the stormwater runoff entering Basin I passes over a grassed area prior to
entering the basin. The roof runoff for Basin 2 must pass through several drainage
structures prior to entering the basin. All other runoff which is not conveyed
through pipes in Drainage Area 2 will pass over grassed areas prior to entering
Basin 2.
Basin 2
1. The roof runoff for Basin 2 must pass through several drainage structures prior to
entering the basin. All other runoff which is not conveyed through pipes in
Drainage Area 2 will pass over grassed areas prior to entering Basin 2.
Basin 1
g. Overflow from both basins will pass through a minimum of fifty -feet of
vegetated swale prior to entering the SA waters.
Basin 1
q. The existing basin, Basin 1, has an existing overflow mechanism consisting of a
b" diameter PVC pipe which overflows into the adjacent conveyance ditch.
Basin 2
q. The proposed basin, Basin 2, will use a 12" Nyloplast Drain Basin. The drain
basin has one inlet and two outlets. The invert for the outlet to the Basin is set at
4.5 MSL which corresponds to the bottom of the basin. The invert of the second
outlet is set at which corresponds to the top of the basin. When the design
elevation in the basin is reached, the stormwater will exit the drain basin through a
pipe
lbemarle
& ASSOCIATES, LTD.
August 4, 2005
NCDENR Land Quality Section
943 Washington Square Mall
Washington, NC 27889
ATTN: Mr. William Moore, PE
RE: Resubmittal
The Nags Head Church
Stormwater Review SW7050606
Dear Mr. Moore:
'1JECLr1VE;D
AUG 0 8 200
DWQ_WAR0
Please find the enclosed the revised Stormwater Management resubmittal for the Nags
Head Church.
The following revisions have been made: the sizes of the two (2) infiltration basins have
been enlarged to accommodate 1-112" of minimum storage capacities, the locations of
the bypass structures have been shown on the plans as well as their respective invert
elevations, cross -sections for the infiltration basins have been shown, and the
stormwater narrative, calculations, and supplements have been revised. Please replace
the first page of the basin supplements with the new revised first page since pages 2
and 3 did not change.
Please feel free to call me if you have further comments or questions regarding this
project.
Sincerely,,
'Z4&
ared L. Madewell, PE
Project Engineer
Attachments
cc: File
Nags Head Church
Cahoon & Kasten Architects (Ltr. Only)
Engineering -- Surveying -- Land Planning
P.O. Box 3989, 115 W Saint Clair St., Kill Devil Hills, NC 27948
Telephone: 252-441-2113 Fax: 252-441-0965
IQe��r�
STORMWATER NARRATIVE Pry%4S
for the
NAGS HEAD CHURCH
in
NAGS HEAD, NORTH CAROLINA
(REVISED)
The congregation of the Nags Head Church intends to construct a new church on a site with an existing
structure that will be removed upon completion of the new structure. The proposed church has a footprint
of 10,040 SF.
The site is located on 2.44 acres on the southwest corner of the intersection of Sound Side Road and
US 158. A portion of the site is currently developed with concrete parking and sidewalks and a structure
containing a chapel, administrative offices, and classrooms.
The site is reasonably level with trees on the undeveloped portion of the property. The Soil Survey for
Dare County has mapped the soils to consist of NuC (Newhan-Urban) and NhC (Newhan-Corolla) with
the majority of the site being Newhan-Corolla. Both complexes are characterized by very rapid
permeability with rates in excess of 20 inches per hour. Elevations range from just under 1.0 MSL to
approximately 10.0 MSL. The lowest elevations that are not part of an existing stormwater management
or conveyance device are around 4.0 MSL. Overall coverage for the site is 43.9%.
There are two (2) drainage areas. Drainage area 1 includes the eastern one-half of the site. It consists of
all of the existing parking and sidewalk and a small portion of the new parking and sidewalk. Coverage
for Drainage Area 1 is being reduced from its current state. Runoff from Drainage Area 1 currently enters
an infiltration basin where it infiltrates into the soil. Excess runoff above that from a 1.5-inch rainfall
overflows through a 6-inch PVC pipe into an existing conveyance ditch adjacent to the Swale. Upon
completion of the project and a resulting reduction in coverage, the basin in Drainage Area 1 will manage
4-1/2 inches of rainfall. The basin is managing stormwater very well and the aforementioned reduction in
coverage will benefit its operation. Drainage Area 2, to the west, includes the new church and the
majority of the new parking. An infiltration basin will be installed in the western portion of the site for
Drainage Area 2. Roof runoff will be conveyed to the basin via building gutters and buried pipes.
Sidewalk and parking runoff will sheet flow to the basin. The basin is designed to store and the runoff
from a 2" storm. A bypass device will be constructed on the northern end of the basin so that when the 2-
inch level is reached, incoming runoff collected by pipe is directed to a relocated portion of the
conveyance ditch adjacent to the basin thus providing a bypass mechanism. Including infiltration, the
basin will manage nearly 4-1/2 inches of rainfall.
A soil boring was taken to estimate the depth to the water table in the vicinity of the proposed infiltration
area. The boring was representative of the Newhan-Urban complex. The depth to the water table
determined through this boring was 42" below the existing grade, which would equate to an elevation at
approximately 2.5' MSL.
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STORMWATER CALCULATIONS
for the
NAGS HEAD CI IURCII
Stormwater Drainage Area #1 (Existing Parking and Portion of Proposed Parking and Sidewalk)
(REVISED)
Drainage Area
61,400 sf = 1.41 ac
SURFACE AREA INFORMATION
Ira revious Surface
C Value
Area
C*A
Sidewalks (Existing)
0.95
1,784
1,695
Sidewalks (Proposed)
0.95
1,297
1,232
Pavement(I;xisting)
0.95
20,182
t9,173
Pavement (Proposed)
0.95
1,522
1,446
Building
1.00
0
0
Total Impervious Area
24,785
23,546
Stormwater Management Areas
C Value
Area
C*A
Infiltration Basin
1.00
3,959
3,959
Total Stormwater Management Area
3,959
3,959
Total Contributing Area
28,744
27,505
Composite C 0.96
Contributing Area 0.66 ac
Infiltration Basin Characteristics
Rasin Storage
Side Sloe Depth ft
Volume c
Infiltration Basin
L3 1.75
3,540
'Total
3,540
Swale Storage
Side Sloe Depth R
Volume c
nla
0 0
0
Total
0
Infiltration **
Surface Area (sQ
Infiltration Rate
Infiltration Basin
3,959
10.00
S wales
0
0.00
Total
3,959
Void Space
Pond Center (sq
Void Space
n/a
20.00
Main
Infiltration
1.00
Stormwater Management 1"
1.5"
2"
3.5"
Intensity(in./hr)
0.5
0.75
1.0
1.75
Runoff (cfs)
0.32
0.47
0.63
1.10
2-Hour Runoff Volume (c f)
2,273
3,410
4546
7,956
Pond Storage Volume (cf)
3,540
3,540
3,540
3,540
Pond/Swale fnfiftration Volume (ef)
6,598
6,598
6,598
6,598
Void Volume Under Pond (cf)
0
0
0
0
Total Stormwater Managed (cf)
10,139
10,138
10,138
10,138
Percent Retained
446%
297%
223%
127%
Percent of Runoff in Storage
156%
104%
78%
44%
• - Stormwater falling upon the drainfield and perimeter areas with greater than two feet separation
excluded from calculations due to the porosity of existing conditions.
** - based on two hour infiltration rate.
0
C A R
(12
Prepared by Albemarle & Associates, Ltd.
814f2005
r
STORMWATER CALCULATIONS
for the
NAGS BEAD CHURCI I
Stormwater Drainage Area #2 (Proposed Building, Sidewalk, and Parking)
(REVISED)
Drainage Area 44,617 sf = 1.02 Eke
SURFACE AREA INFORMATION
Imprevious Surface
C Value
Area
C*A
0.95
0
0
Sidewalks (Existing)
Sidewalks (Proposed)
0.95
917
$71
Pavement (Existing)
0.95
0
0
Pavement (Proposed)
0.95
11,094
10,539
Building
1.00
10,288
10,288
Total Impervious Area
22,299
21,698
Stormwater Mana ement Areas
C Value
Area
C*A
Infiltration Basin
1.00
3,518
3,518
Total Stormwater Management Area
3,518
3,518
Total Contributing Area
25,817
25,216
Composite C
Contributing Area
Infiltration Basin Characteristics
Basin Storage
Stormwater Basin
'total
0.98
0.59 ac
Side Slope Depth
1:3 1.25
2 43
Swale Storage
I Side Sloe Depth (ft) I
Volume c
n1a
0 0
0
Total
0
Infiltration **
Surface Areas
Infiltration Rate in.lhr
Infiltration Volume c
Infiltration Basin
3,518
10.00
5,863
'rota)
3,518
5,863
Void Space
Pond Center (so
Depth f1
Void Volume c
nla
20.00
1.00
0
Main
0
Stormwater Management l"
1,5"
2"
3"
Intensity (in.lhr)
0.5
0.75
1.0
1.5
Runoff(cfs)
0.29
0.43
0.58
0.87
2-Hour Runoff Volume (cf)
2,094
3,126
4,168
6,252
Pond Storage Volume (cf)
3,212
3,212
3,212
3,212
Pond/Swale Infiltration Volume (cf)
5,863
5,863
5,863
5,863
Void Volume Under Pond (cf)
0
0
0
0
Total Stormwater Managed (cf)
9,075
9,075
9,075
9,075
Percent Retained
435%
290%
218%
145%
Percent of Runoff in Storage
154%
103%
77%
51
• - Stormwater falling upon the drainfield and perimeter areas with greater than two feet separation
excluded from calculations due to the porosity of existing conditions.
** - based on two hour infiltration rate.
Prepared by Albemarle & Associates 8/4/2005
(Re vied)
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORM WATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopiedfor use as an original
DWQ 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: Nags Head Church
Contact Person: Mr. Jared L. Madewell. PE
This worksheet applies to: Basin No. I
(as identified on plans)
Phone Number: 252-441-21 13
in Drainage Area 1
(from Form SWU-101)
[I. 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
Infiltration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Sire
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
NuC & NhC
>20 in/hr r cf/hr/sf (circle appropriate units)
2.50 fmsl (Seasonal High Water Table elevation)
l .5 inch (1.5 inch event for SA waters, I inch event for others)
3,286 c.f.
0.0625 Days
202.0 ft. x 19.6 f1.= 3,959 sq.ft. (bottom dimensions)
3,540 c.f.
4.25
Fmsl
5.33
Fmsl
6.00
Fmsl
Form SW U-103 Rev 3.99 Pagel of 3
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Permit No.
{�F."' , , j �, ` (to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
3�5 Division of Water Quality
1)VVQVAR0 STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal include a sto water management permit application, an
infiltration basin supplement for each system, design calcula ' n , soils report and plans and specifications
showing all stormwater conveyances and system details.
1. PROJECT INFORMATION
Project Name: Nags Head Church
Contact Person: Mr. Jared L. Madewell, PE Ph e Number: 252-441-2113
This worksheet applies to: Basin No. I ���_ in Drainage Area I
(as identified onptans) (from Form SWU-tot)
11. DESIGN INFORMATION - Attach supportin9�alcul ions/documentation. The soils report must be
based upon an actual field investigation and so borin s. County soil maps are not an acceptable
source of soils information. All elevations gall a in feet mean sea level (fmsl).
Soils Report Summary
Soi I Type
Infiltration Rate
SHWT Elevation
Basin Desi Parameters
Design Sto
Design Vol me
Drawdown e
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
NuC & Nh
>20 in/hr cf/hr/sf (circle appropriate units)
2.50 fmsl ( easonal High Water Table elevation)
5 inc(1.5 inch event for SA waters, 1 inch event for others)
3, 6
5
N.00 ft. x 16.00 ft.= 2,960 sq.ft. (bottom dimensions)
2.88 c.f.
4.25 Fmsl
5.25 Fmsl (With Infiltration)
6.00 Fms l
Form S W U- 103 Rev 3.99 Page I of 3
III. 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 that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
4 a.
System is located 50 feet from class SA waters and 30, feet from other surface waters.
4 b.
System is located at least 100 feet from water supply wells.
4 c.
Bottom of system is at least 2 feet above the seasonal high water table.
4? d.
Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
4 e.
System is not sited on or in fill material or DWQ approval has been obtained.
f.
System is located in a recorded drainage easement for the purposes of operation and maintenance
and has recorded access easements to the nearest public right-of-way.
4 g.
Drainage area for the device is less than 5 acres.
h.
Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached.
i.
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.
j.
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.
k.
All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
1.
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
m.
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).
1 _ o. Flow distribution mechanism within the basin is provided.
p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
( q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r. System is designed to draw down the design storage volume to the proposed bottom
elevation under seasonal high water conditions within five days. A soils report and all pertinent
draw -down calculations are attached.
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
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IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
1. After every runoff producing rainfal I 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.
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.
Remove accumulated sediment from the pretreatment system and infiltration basin annually or when the 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, etc.).
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 be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments.
When the design depth reads _0.75_ feet in the pretreatment unit, the sediment shall be removed from both the
pretreatment unit and the infiltration basin.
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 stormwater 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 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 and Title:_ Mr. Bruce Copeland
Address:_ P.O. Box 302; Nags Head, 27959
Phone: 252-44J -7548
Signature:
Date: /Z'
Nate: 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, Tared. L,ma so-wel y , a Notary Public for the State of NOA CA rr0114g , County of
I6 re , do hereby certify that B C '.Ac e [n,Qe �A,a d personally appeared before me
this day of Ma , 2005 , and acknowledge the due execution of the forgoing infiltration basin maintenance
requirements. Witness my hand and official seal,
SEAL My commission expires 2-15- 2 9
Signature
• • • �4 I�ioli�ry �+�IHOrt11 C'.arOIIr18
County of Dwe
%€ Jared L. MB&Weil
. - �
`. - . ` �
z � .
(Revisca�
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
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ 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.
1. PROJECT INFORMATION
Project Name: Nags Head Church
Contact Person: Mr. Jared L. Madewell, PE Phone Number: 252-441-21 13
This worksheet applies to: Basin No. 2 in Drainage Area
(as identified on plan)
2
(from F'ormSWU-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 (fms]).
Soils Report Summary
Soil Type
Infiltration Rate
SHWT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown Time
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
NuC & NhC
>20 in/hr r of/hr/sf (circle appropriate units)
2.50 fmsl (Seasonal High Writer Table elevation)
L5 inch (1.5 inch event for SA waters, I inch event for others)
3,042 c.f.
0.0625 Days
143.0 ft. x 24.6
3.070 c.f.
4.50
fmsl
5.58
fmsl
5.75
fmsl
Form S W U-103 Rev 3.99 Page 1 of 3
ft.= 3,518 sq.ft. (bottom dimensions)
r'r IV.
Tr °rl
T)
_
•rs ,
11
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
INFILTRATION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DW_O 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: Nags Head Church
Contact Person: Mr. Jared L. Madewell, PE Phone Number �252-441-2113
This worksheet applies to: Basin No. 2 (we�) in Drainage Area 2
(as identified on plans) t (from Form SWU-101)
I1. DESIGN INFORMATION - Attach supporting alculat ons documentation. The soils report must be
based upon an actual field investigation and so'l borN�gs. County soil maps are not an acceptable
source of soils information. All elevations shall be in ket mean sea level (fmsl).
Soils Report Summary
Soil Type NuC & NhC
Infiltration Rate >20 in/ r r�-'
/hr/sf (circle appropriate unit~)
SHWT Elevation / .50 Sonal High Water Table elevation)
Basin Design Parame r*\\
Design Storm inch (1.5 inch eventfor SA waters, I inch event for others)
Design Volume c.f.Drawdown Time Days
Basin Dimensions
Basin Size 142.05 ft. x 20.00 ft.= 2,841 sd.ft. (bottom dimensions)
Basin Volume Provided 2,390 c.f.
Basin Elevations
Bottom Elevation 4.50 fmsl
Storage Elevation 5.50 fmsl
Top Elevation 5.75 fmsl
Form SWU-103 Rev 3.99 Pagel of 3
I1I. 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 that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30, feet from other surface waters.
b. System is located at least 100 feet from water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
e. System is not sited on or in fill material or DWQ approval has been obtained.
f. System is located in a recorded drainage easement for the purposes of operation and maintenance
and has recorded access easements to the nearest public right-of-way.
g. Drainage area for the device is less than 5 acres.
h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is attached.
i. 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.
j. 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.
k. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
e 1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
sediment trap is provided.
m. 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).
o. Flow distribution mechanism within the basin is provided.
p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
q. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
r. System is designed to draw down the design storage volume 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 meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
Form S W U-103 Rev 3.99 Page 2 of 3
IV. INFILTRATION BASIN OPERATION AND MAINTENANCE AGREEMENT
1. 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.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when the 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, etc.).
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 be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments.
When the design depth reads 0.92— feet in the pretreatment unit, the sediment shall be removed from both the
pretreatment unit and the infiltration basin.
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 stormwater control devices as allowed
by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that l 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.
Print Name and Title:_ Mr. Bruce Copeland
Address:_ P.O. Box 302; Nags Head, 27959
Phone:_ 252-441-7548
Signature
Date:_ ,r �'7 le
Note: The legally responsible party should not he a homeowners association unless more than 50% of the lots have been sold
and a resident of the subdivision has been named the president.
1, J A red L , /Act � ew e f l , a Notary Public for the State of 4N or+h 64 Ica[�y� County of
Da {`e , do hereby certify that r Lv—e✓ a n ci personally appeared before me
this day of a\ 17 , 2W S, and acknowledge the due execution of the forgoing infiltration basin maintenance
requirements. Witness my hand and official seal,
SEAL My commission expires Z 15— 200
FFI IAl- Si nature
Noteny RM4c. North Carolina g
County of Dare
Jared L. Madewell
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ROY COOPER
Governor
MICHAEL S. REGAN
.Secretary
WILLIAM E. (TOBY) VINSON, JR
Interim Director
Pastor Rick Lawrenson
Nags Head Church, Inc.
P.O. Box 302
Nags Head, NC 27959
Dear Pastor Lawrenson:
NORTH CAROLINA
Environmental Quality
January 11, 2019
Subject: Stormwater Permit Renewal
Stormwater Management Permit SW7050606
Nags Head Church
Dare County
r
1Vo
A Division of Energy, Mineral, and Land Resources file review has determined that
Stormwater Permit SW7050606 for a stormwater treatment system consisting of two
infiltration basins serving the Nags Head Church located at 105 W. Soundside Road in
Nags Head, NC expires on September 8, 2019. This is a reminder that permit renewal
applications are due 180 days prior.to expiration. We do not have a record of receiving
a renewal application at this time.
Please submit a completed permit renewal application along with a $505.00 fee for
permit renewal. Permit application forms for renewal can be found on our website at:
htt s: de ,nc. ov about divisions eiiet-gy-iiiinei-al-land-resources/eiiei-gy-mineral-lancJ-
rulesJstortnwater-program/_posL:..custruction. North Carolina General Statutes and the
Coastal Stormwater rules require that this property be covered under a stormwater
permit. Failure to maintain a permit subjects the owner to assessment of civil penalties.
If you have questions, please feel free to contact me at (252) 948-3923. 1 will be glad to
discuss this by phone or meet with you. If you would like I can e-mail you a copy of the
renewal application. You can request a copy by e-mailing me at
roger.thorpe@ncdenr.gov.
Sincerely,
Roger K. Thorpe
Environmental Engineer
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dwN+�.ni a oMmmmneui dirmr
North Carotin Department of Fnvironmental Quality 1 Dtviston of Energy, Mineral and Land Resources
Washington Regional Office 1943 Washington Square Mail I Washingtoi, North Carolina 27889
252.946.6481