HomeMy WebLinkAboutSW8070649_Current Permit_20080208Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins Director
Division of Water Quality
February 8, 2008
Scott Cook, Member
Neighborhoods of Holly Ridge, LLC
106-A Cinema Drive
Wilmington, NC 28403
Subject: Stormwater Permit No. SW8 070649
The Neighborhoods of Holly Ridge Phase 3
High Density Subdivision Project
Onslow County
Dear Mr. Cook:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for The Neighborhoods of Holly Ridge Phase 3 on January 10, 2008. 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. SW8 070649, dated February 8, 2008, for the construction of the subject
project.
This permit shall be effective from the date of issuance until February 8, 2018, 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 sixty (60) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Rhonda Hall, or me at (910) 796-7215.
Sinc y,
ls4d'x—
E w rd eck
Regional Supervisor
Surface Water Protection Section
ENB/rbh: S:\WQS\STORMWATER\PERMIT\070649.feb08
cc: Luke Menius, Stroud Engineering
Onslow County Inspections
Rhonda Hall
Wilmington Regional Office
Central Files N�ogcT�ettnnCarotina
dvaturallry
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service
Wilmington Regional Office Internet: www.newateMuali!Y.org Fax (910) 350-2004 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer— 50°% Recyded/10% Post Consumer Paper
State Stormwater Management Systems
Permit No. SW8 070649
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
Scott Cook and Neighborhoods of Holly Ridge, LLC
The Neighborhoods of Holly Ridge Phase 3
NC Hwy 50, Holly Ridge, Onslow County
FOR THE
construction, operation and maintenance of two infiltration basins and four storage
basins with pump 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.
This permit shall be effective from the date of issuance until February 8, 2018 and shall
be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The subdivision is
permitted for 243 lots, each allowed 4,200 square feet of built -upon area.
3. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
4. Each of the two basins must be operated with 50" vegetated filters. Four
bypasses for runoff in excess of the design storm are provided, each with a 50'
vegetated filter; one at Pump Basin A, one at Pump Basin B, one at Pump Basin
C, and one at Pump Basin D.
5. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
Page 2 of 8
State 5tormwater Management Systems
Permit No. SW8 070649
6. The following design elements have been permitted for this infiltration basin
stormwater
facility, and must be provided in the system at all times.
Pond it
Pond i2
a.
Drainage Area, acres:
48.06
25.51
Onsite, ft2:
2,093,386
1,111,296
Offsite, ft2:
None
None
b.
Total Impervious Surfaces, ft2:
1,007,002
461,846
Lots at 4,200 ft2:
730,800
289,800
Roads/Parking, ft2:
222,278
137,950
Sidewalk, ft2:
39,724
24,096
Other, ft2:
14,200
10,000
Offsite, ft2:
None
None
c.
Basin Depth, feet:
0.7
1.2
d.
Design Storm:
1.5
1.5
e.
Bottom Elevation, FMSL:
61.3
60.8
f.
Seasonal High Water Table, FMSL:
59.3
58.8
g.
Permitted Surface Area @Bottom, ft2:
9,589
4,876
h
Total Permitted'Storar Volume, ft3:
154,629
83,809
Infiltration Basin, ft :
7,497
6,839
Pump Basin A, ft3:
39,712
N/A
Pump Basin B, ft3:
107,420
N/A
Pump Basin C, ft3:
N/A
66,155
Pump Basin D, ft3:
N/A
10,815
i.
Storage/Bypass Elevation, FMSL:
62.0
62.0
j
Type of Soil:
Kureb
Kureb
k.
Expected Infiltration Rate, in/hr:
17.4
13.7
Infiltration basin volume rate, gpm:
1,729
692
Pump A volume rate, gpm:
57
Pump B volume rate, gpm:
127
Pump C volume rate, gpm:
N/A
107
Pump D volume rate, gpm:
N/A
21
I.
Time to Draw Down, days:
3.9
2.5
m.
Receiving Stream / River Basin:
County Line Branch / Cape Fear River
n.
Stream Index Number:
18-87-6-1
o.
Classification of Water Body:
"SA; HQW"
II. SCHEDULE OF COMPLIANCE
1. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature
(such as swales) shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit and receiving
approval from the Division.
2. The permittee is responsible for verifying that the proposed built -upon area for
the entire lot, including driveways and sidewalks, does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be
revised without approval from the Division of Water Quality, and responsibility for
meeting the built -upon area limit is transferred to the individual property owner.
Page 3 of 8
State Stormwater Management Systems
Permit No. SW8 070649
3. 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.
4. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, acquisition, or sale of all or part of the project area.
The project area is defined as all property owned by the permittee, for
which Sedimentation and Erosion Control Plan approval or a CAMA Major
permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
5. The Director may determine that other revisions to the project should require a
modification to the permit.
6. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
7. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately. Infiltration systems should not be used
as erosion control devices, due to the potential clogging. If the stormwater
system was used as an Erosion Control device, it must be restored to design
condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification.
9. The permittee shall at all times provide the operation and maintenance
necessary to assure that all components of the permitted stormwater system
function at optimum efficiency. The approved Operation and Maintenance Plan
must be followed in its entirety and maintenance must occur at the scheduled
intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and 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 structures, orifice, catch basins and
piping.
g. Access to all components of the system must be available at all times.
Page 4 of 8
State Stormwater Management Systems
Permit No. SW8 070649
10. 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.
11. Permanent seeding requirements for the stormwater control must follow the
guidelines established in the North Carolina Erosion and Sediment Control
Planning and Design Manual.
12. Prior transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any
items not in compliance must be repaired or replaced to design condition prior to
the transfer. Records of maintenance activities performed to date will be
required.
13. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with
State Stormwater Management Permit Number SW8 070649, as issued
by the Division of Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to
the extent necessary to maintain compliance with the Stormwater
Management Permit.
C. These covenants are to run with the land and be binding on all persons
and parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded
without the express written consent of the State of North Carolina, Division
of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take
place without the concurrence of the Division of Water Quality.
f. The maximum built -upon area per lot is 4,200 square feet. This allotted
amount includes any built -upon area constructed within the lot property
boundaries, and that portion of the right-of-way between the front lot line
and the edge of the pavement. Built upon area includes, but is not limited
to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and
parking areas, but does not include raised, open wood decking, or the
water surface of swimming pools.
g. Lots within CAMA's Area of Environmental Concern may be subject to a
reduction in their allowable built -upon area due to CAMA regulations.
h. All runoff from built upon area on the lot must drain into the permitted
system. This may be accomplished through providing roof drain gutters
which drain to the street, grading the lot to drain toward the street, or
grading perimeter swales and directing them into the pond or street. Lots
that will naturally drain into the system are not required to provide these
measures.
Built -upon area in excess of the permitted amount will require a permit
modification.
14. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
Page 5of8
State Stormwater Management Systems
Permit No. SW8 070649
15. 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.
16. Built upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina and parking areas, but does not include
raised, open wood decking, or the water surface of swimming pools.
III. GENERAL CONDITIONS
1. This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event there is either a desire for the facilities to
change ownership, or there is a name change of the Permittee, a
"Name/Ownership Change Form" must be submitted to the Division of Water
Quality accompanied by appropriate documentation from the parties involved.
This may include, but is not limited to, a deed of trust, recorded deed restrictions,
Designer's Certification and a signed Operation and Maintenance plan. The
project must be in good standing with DWQ. The approval of this request will be
considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all of the terms and conditions
of this permit until such time as the Director approves the transfer request.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
6. The 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.
7. Permittee grants permission to staff of the DWQ to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
8. The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
9. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Permit issued this +ti„ Qth day of February, 2008.
NOR CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
/c3iv� -
for olden H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8
State Stormwater Management Systems
Permit No. SW8 070649
The Neighborhoods of Holly Ridge Phase 3 Page 1 of 2
Stormwater Permit No. SW8 070649
Onslow County
Designer's Certification
1, , as a duly registered in
the State of North Carolina, having been authorized to observe (periodically/weekly/full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form are a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 7 of 8
V
State Stormwater Management Systems
Permit No. SW8 070649
Certification Requirements:
cc
Page 2 of 2
.1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8-. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, a
forebay, and the vegetated filter.
15. The required dimensions of the system are provided, per the approved
plan.
NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 8 of 8
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
-off -d 7
, 00
,ry 0 M
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Neighborhoods of Holly Ridge, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Scott Cook.' Member
3. Mailing Address for person listed in item 2 above:
City: Wi lmingt-nn State: NC Zip:28403
Telephone Number: ( 910 ) 343 — 9202
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
The Neighborhoods of Holly Ridge Phase 3
5. Location of Project (street address):
NC Hwy 50
City: Holly Ridge County: Onslow
6. Directions to project (from nearest major intersection):
From intersection of NC 17 and NC 50 in Holly Ridge, take NC 50 1.4 miles
7. Latitude: 34 degrees, 28' -:45" N Longitude. 77degrees 33' 57" W of project
8. Contact person who can answer questions about the project:
Name: Luke Menius/Stroud Engineer ing Telephone Number: ( 910 ) 815-0775
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
REC EIVEI:)
Form SWU-101 Version3.99 Page 1 of JUN 2 9 2007
BY:
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density x High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major X Sedimentation/Erosion Control x 404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater will be routed to 1 of 4 storage basins via curb and gutter. Basins
will be pumped to 1 of 2 infiltration basins for treatment.
2. Stormwater runoff from this project drains to the Cane Fear River basin.
3. Total Project Area: 73.57 acres 4. Project Built Upon Area: 45.8 %
5. How many drainage areas does the project have? 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.
**Coo Ai-*arharl**
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
Receiving Stream Class
Drainage Area
Existing Impervious* Area
Proposed Impervious *Area
% Impervious* Area (total)
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
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
SWU-101 PAGE 2 SUPPLEME
TOTAL PROJECT AREA 3204682 SF 73.57 AC
TOTAL BUILT UPON AREA 1468848 SF 33.72 AC
TOTAL PERCENT IMPERVIOUS 45.83 %
BASIN INFORMATION
DRAINAGEAREAA
DRAINAGEAREAB
DRAINAGE AREA
DRAINAGE AREA
RECEIVING STREAM NAME
2OUNTY LINE BRANCH
=NTY LINE BRANCH
DOUNTY LINE BRANCH
OUNTY LINE BRANCH
RECEIVING STREAM CLASS
SA -HOW
SA -HOW
SA -HOW
SA -HOW
DRAINAGE AREA
570139
1523247
936673
175823
EXISTING IMPERVIOUS AREA
0
0
0
0
PROPOSED IMPERVIOUS AREA
250243
756759
404094
57752
%IMPERVIOUSAREA
43.89
49.68
43.19
32.88
IMPERVIOUS SURFACE AREA
DRAINAGEAREAA
DRAINAGE AREA
DRAINAGE AREA
DRAINAGE AREA
ONSITE BUILDINGS LOT BUA
189000
541800
247800
42000
ONSITE STREETS
48982
173296
124363
13587
ONSITE PARKING
0
0
0
0
ONSITESIDEWALKS
B061
31663
21931
2165
OTHER ONSITE (RESERVE)
4200
10000
10000
0
OFF SITE
0
0
0
0
TOTAL
250243
768759
404004
57752
CONSTRUCTION METHOD 1EXCAVATIONGERM EXCAVATION i EXCAVATIONTBERM EXCAVAT10N43ERM
DRAINAGE METHOD DRAWDOWN ORIFACE DRAWDOWN ORIFACE DRAWDOWN ORIFACE DRAWDOWN ORIFACE
7. How was the off -site impervious area listed above derived? NA
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.
** SEE ATTACHED**
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 4200 square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management k
• Two copies of plans and specifications, including: L-1
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Luke Menius, Stroud Engineering
Mailing Address: 102-D Cinema Dr.
City: Wilmington State: NC Zip: 28403
Phone: ( 910 ) 815-0775
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Scott Cook, Member
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 recor qd, and that the proposed project complies with the requirements of 15A
NCAC 211.100 . t „ /
Signature:
Form SWU-101 Version 3.99 Page 4 of 4
Date:
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.
I. PROJECT INFORMATION
Project Name: 7-vr� �e gLbg,^kov.�; m� i).11y /1�o�9e, / 4QSe
Contact Person: LN _ sf /aM d Fw.jl�e4e,Y Phone Number: ( 9) o ) F)5 -D -7 71
�r
This worksheet applies to: Basin No. i I in Drainage Area A 9
(as identified on plans) (from orne 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 (finsl).
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
t�u✓'2
/ -r • 4 in/hr or Cf/hr/Sf (circle appropriate units)
Sg .3 fxnsl (Seasonal High Water Table elevation)
I • s inch (1.5 inch event for SA waters, I inch event for others)
l24 3-71 c.f.
3. days
I2-1 ft.x 77
7 H-7 ex.
(1. 3
fmsl
6 2
finsl
42
finsl
ft. _ 7, S P 'I Sq. ft. (bottom dimensions)
Form SWU-103 Rev 3.99 Page 1 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
a.
System is located 50 feet from class SA waters and 30 feet from other surface waters.
G^
b.
System is located at least 100 feet from water supply wells.
Lk
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.
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
I 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).
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 SWU-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 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- 5 Z !; 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: Set+ Caok , e.,,��l; 1V�.'q�,�a��oo�s e'r , Jy /Q,dje, LLC
Addres
I/a 3 4 3 - _ o z
Signature:
L 2 ,? 140 3
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president. h /�
I, �� tA.(� Vl , a Notary Public for the State of Nava aya 0-an Ilha County of
'N(� %i(dn/� , do hereby certify that .S 0* o K' personally appeared before me this
day of 1{111� , W O , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand q IM9 c�'a111do"
��E J0n'�'g
y p 1(JYI.�_ I�,oro
SEAL � OYAr'� •2 � M commission ex fires �
r
� Z • � r
i
Form SWU-4"oaa G����� Page 3 of 3
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.
I. PROJECT INFORMATION
Project Name: T� /ve,gl� r�iaoc�f mIC p.,/)y r��►9� ' "P49fe -3
Contact Person: L. ke- Me✓i%..s . S4,-ow a Fi? 2Aeav►2y Phone Number: ( 9) ° )P)S -O r7 -71
This worksheet applies to: Basin No. A—'e Ss r'� A in Drainage Area A
(as identifed on plans) (from Form 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 (finsl).
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
0
A in/hr or cf/hr/sf (circle appropriate units)
Z S• O finsl (Seasonal High Water Table elevation)
- 5 inch
3/-7 c.f
9 days
nth ft. X
39 7 I Z c.f.
Z 3. D finsl
Z6.61 fmsl
Z-7 • o finsl
(1.5 inch event for SA waters, 1 inch event for others)
MA ft. = 11 sq. $. (bottom dimensions)
;D, 17M,Yt 191,-1 = Z SS, o r >PW i
Form SWU-103 Rev 3.99 Page 1 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
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.
N c. Bottom of system is at least 2 feet above the seasonal high water table.
/V4 d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
,VA 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.
AA
h.
Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
NA
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).
YA
1.
A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
141A
sediment trap is provided.
In.
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 SWU-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 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.
t (•f 2� Per.a,�u,tlomol .I,,��hl
When the design depth reads i 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: SCat+ C-ok, M12,,L111-, N�.gl,�ar�oe�cs e,e ,tJy k-dje, LLL
Address: q I o 6 -A C,i�4 /per; � L✓� �--,,n��-��, ye- 2� 4a 3
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I, AL ] f- A .U_dan , a Notary Public for the State of NVA N nP, County of
W 410441& , do hereby certify that , _ 0 W IL personally appeared before me this
day of , zoyy , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Mil,iWitness my h`ai�;o%Kici�t�a}% �, - y ��
GQe' • pTA,q ..%y2 /�V1 ��
June /�
SEAL � '� f' My commission expires ,
Z's
Form SWU-I &I, I ``��� Page 3 of 3
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.
I. PROJECT INFORMATION
Project Name: Tie A e'qL�,Pr4,Pvds v'r p'' jy /1��9�, 4Se 3
Contact Person: LuSf,-o-J Fiig,ne Ytn Phone Number: ( 9) ° ) F)5 -D -711
This worksheet applies to: Basin No. &-"/> .8 in Drainage Area )3
(as identi ted on pl ns) (from Form 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
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
"�A
in/hr or cf/hr/sf (circle appropriate units)
L CTe 0 fmsl (Seasonal High Water Table elevation)
inch (1.5 inch event for SA waters, I inch event for others)
c.f
3 - R days
NR ft. x /V ft. _ ' " sq. ft. (bottom dimensions)
/o -7 'j 2 o c.f.
9S' d fmsl
5 3. Z I fmsl
'5's'0 fmsl
Form SWli-103 Rev 3.99 Page 1 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
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.
Yh c. Bottom of system is at least 2 feet above the seasonal high water table.
JY4 d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
IVA 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.
N� h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
N� 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.
N� 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 SWU-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 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 3 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. ALA..
o
Print Name and Title: Sc. t-+ C' o k Gt.,, Lll ; N eAI�a,' A.. -1 S o f #JY /\idle, LL C-
Address: l D 6 -- A C;Ae--a D r. --e.- I.✓�--�,��fi•�, /vim 2,P 4 a 3
Phone: jd 3 y 3 �� z �l Date: 1 //° /V'r
Note: The rally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
n/resident of the subdivision has been named the president. 1 I I �_ bkknL
I,l�U Y < < tl _ � ►6M(jn , a Notary Public fjjo��r them�eStateof IyOY t County of
NPAJ) �lan�i , do hereby certify that —WI 0-0011 personally appeared before me this 16-th
day of ZOO 6 , and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my hand and WW o>i al, IS, 1!
—)61
' A J ����i
SEAL `:Sys i My commission expires
O�O fA LI Una loll. �l�l
• ,9
;a •� jOciste� :' z
Form SWU-l0ia,99,..--r• ���w Page 3 of 3
i���' �NOVER,'����
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.
I. PROJECT INFORMATION J pp D
Project Name : T� lv e �g �� y oo�f o J,I� fly 9e , / 49se
Contact Person: LU ke Me✓►:..s Si /ate. d F.4!7;.,ea,T Phone Number: ( 9) 0 ) ?)S -D "1-11
r
This worksheet applies to: Basin No. 1' L it - in Drainage Area c/D
(as identified on plans) &m Form SWTJ--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
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
%u re L
) 3 • -7 in/hr or cf/hr/sf (circle appropriate units)
.S &?' 8 fmsl (Seasonal High Water Table elevation)
inch (1.5 inch event for SA waters, I inch event for others)
S 8903 c.f.
2 •5 days
9'? 50
ft. x
-?C7 c.f.
G D frnsl
fmsl
6 Z- find
ft. = �9 7 6 sq. ft. (bottom dimensions)
Form SWU-103 Rev 3.99 Page 1 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
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
I areas draining to SA waters ). Design volume and infiltration calculations attached.
In 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).
I1. 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 SWU-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 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 -9 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. f1 1I I Q`'
Print Name and Title: %� t+ C' o k Q.•n �61, N i?,� 1��e tgae M S ,dell y A d f B, LL C—
Address: W -A C��Pr� D r;�-e_ l�✓� l•n��>t,, 2-,? 3
Phone: I1�3 2 ° Date:
Signature:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
0I, �n Q �' Yj , a Notary Public for the State of County of �� y�
�1UI�Y 4.� do hereby certify that �� �. personally appeared before me this to 1h
day of — ,J
Witness my
and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
1 -L
VQ;;•' �l'A6
SEAL 1 ; y = My commission expires L I( o
�2 �U�
..
,y••.......-•�o��
Form SWU-10
31-11��R
Page 3 of 3
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.
I. PROJECT INFORMATION
Project Name : 7-� /`� 2 ;q b .�r �j aoc{S o.r /4 y '11949se
Contact Person: Luke Aen%ks . S-t /'ow d Phone Number: ( 1) o ) 81S -0 -7 -71
This worksheet applies to: Basin NoA y 715 Ae, C in Drainage Area C
(as identified on plans) (from Form Si U--101)
H. 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 (finsl).
Soils Report Summary
Soil Type
Infiltration Rate
SE WT 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
NA
Y-A in/hr or cf/hr/sf (circle appropriate units)
Lf `t • D fmsl (Seasonal High Water Table elevation)
]Itch (1.5 inch event for SA waters, I inch event for others)
513 `l c.f.
Z 5 days
ft. x �"� ft. = NA sq. ft. (bottom dimensions)
6 6 Ifs c.f.
9 o. ` finsl
fmsl
?•O finsl
Form SWU-103 Rev 3.99 Page 1 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
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.
19 C.
Bottom of system is at least 2 feet above the seasonal high water table.
AJA 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.
IV A h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
1% A 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).
N1. A pretreatment device such as a catch basin, grease trap, filter strip, grassed swale or
A sediment trap is provided.
�1 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.
h 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
I 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 SWU-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 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 3 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: Sca C-ok, JMQ"nbf/, Nam,%/��,�"��oa s e'e �Jy /'c )fe' LLL
Address: LIP' 1".A- N-7, fVL 2,? 14 -0 3
Phone: V 3'f 3 - 2 11 7- Date: r
Note: The lolly 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.
a Notary Public for_the State of /tJ0'� (.QroJlnPeounty of
do hereby certify that �o �_fom X personally appeared before me this 16:th
day of___5aArU ,Z_OW and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
Witness my� and ;
SEAL \_\GTRR �%�s My commission expires �Jf)1�d. a, Z/a
's AI'$ LiG CU
Form SWU-13.9�.
19 • GO.1 Page 3 of 3
r���'NO; i Ft 1,,```
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.
I. PROJECT INFORMATION
Project Name: -T' e �J e ;2 L 1.9i` b aoc(S of %Your x-�Fa I '14s Se
Contact Person: Lu ke, Ae^us sf pow dPhone Number: ( 9) ° ) 81,E -D -17S
This worksheet applies to: Basin No. k -oe P in Drainage Area 1)
(as identified A plans) (from Form SWU-101)
H. 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 (finsl).
Soils Report Summary
Soil Type PA
Infiltration Rate /OA in/hr or cf/hr/sf (circle appropriate units)
SHWT Elevation V• O fiml (Seasonal High Water Table 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
/'s inch (1.5 inch event for SA waters, I inch event for others)
`7 Sq5 c.f
If 7 days
,A ft. X �� ft. = NA
/ 0 F 15 c.f
3 1.0 fmsl
b.,,r frnsl
4 D • o frnsl
ft. (bottom dimensions)
•x f,g 61 T
Form SWU-103 Rev 3.99 Page 1 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
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.
t� 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.
II
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.
In.
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.
II
V`+ 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 SWU-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 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 3 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 Til
Address: % o 6
Phone: 11 V 3 `_
Signature:
srp"1 C001-'(Ma#ey
, ,a-7-e
-9)9Z
rv/o7
Note: ally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdiviisioon/ has been named the president. /J�
I, � {'/P -� . �U ►`G1Q/'1 , a Notary Public for the State of NQr�R � UJ'1') 0a4 County of
_lt �hU 14anO&OV— , do hereby certify that _off: CQQ� personally appeared before me this_0A
day of Miami ,Zj)( ,and acknowledge the due execution of the forgoing infiltration basin maintenance requirements.
10tll s
Witness my hand ar��,edi�ia�e�P/,+ors
m-
.' OTA 9
SEAL � GI �'j My commission expires �1u
Z'
Form SWU-103 yv�&ER GO```�� Page 3 of 3
�/111111111o",
«B»
In accordance with Title 15 NCAC 2H.1000, the Coastal Stormwater Management Regulations, deed
restrictions and protective covenants are required for High Density Residential Subdivisions where
lots will be subdivided and sold and runoff will be treated in an engineered stormwater control facility.
Deed restrictions and protective covenants are necessary to ensure that the development maintains a
"built -upon" area consistent with the design criteria used to size the stormwater control facility.
I, SCOTT COOK, MEMBER, NEIGHBORHOODS OF HOLLY RIDGE, LLC , acknowledge, affirm and
agree by my signature below, that I will cause the following deed restrictions and covenants to be
recorded prior to the sale of any lot:
1. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number , as issued by the Division of Water Quality
under NCAC 2K.1000.
2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit.
3. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
4. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Water Quality.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Water Quality.
6. The maximum allowable built -upon area per lot is 4200 square feet. This allotted amount
includes any built -upon area constructed within the lot property boundaries, and that portion of
the right-of-way between the front lot line and the edge of the pavement. Built upon area
includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina
and parking areas, but does not include raised, open wood decking, or the water surface of
swimming pools.
This allotted amount includes any built -upon area constructed within the lot property boundaries,
and that portion of the right-of-way between the front lot line and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
7. All runoff from the built -upon areas on the lot must drain into the permitted system. This may be
accomplished through a variety of means including roof drain gutters which drain to the street,
grading the lot to drain toward the street, or grading perimeter swales to collect the lot runoff
and directing them into a component of the stormwater collection system. Lots that will naturally
drain into the�sp e a t ed to provide these additional measures.
Sign re. Date: q / 0-7
I, , / ,, , a Notary Public in the
State of �/ kfSV-�'! �a ►�1/na , County of i JVW f�t� n6Vt ,
do hereby certify that �CD (.G(J� personally appeared
before me this the I I-h day of bW— , 200, and acknowledge
the a execution of the foregoing instrument. Witness my hand and official seal,
0'.ttJ11111111,
NE
`: , A '
1b. (*'�nct ou�.9
Signature ``�GP.•�OTA ......R �2'1
' t
e
My Commission expires � /!� � �%� = z
?O