SW8090217_Current Permit_20120112

A4
P
NCDETIR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
January 12, 2012
Sterling Cheatham, City Manager
City of Wilmington, Parks, Recreation and Downtown Services
102 North Third Street
Wilmington, NC 28402
Subject: Approved Plan Revision
Olsen Park
Stormwater Project No. SW8 090217
New Hanover County
Dear Mr. Cheatham:
Dee Freeman
Secretary
On December 9, 2011, the Wilmington Regional Office received a plan revision for Stormwater
Management Permit Number SW8 090217. The revisions include the relocation of the Playground
Area and the construction of a 24' wide paved drive and parking area and the expansion of the
Miracle League Ballfield. These improvements result in a net increase of 35,699 square feet of built -
upon -area (BUA) and reduce the allotted future BLIA from 626,541sf to 590,842. It has been
determined that a formal permit modification is not required for the proposed changes. We are
forwarding you an approved copy of the revised plans for your files. Please add the attached plans to
the previously approved plan set.
Please be aware that all terms and conditions of the permit issued. on May 11, 2009, remain in full
force and effect. Please also understand that the approval of this revision to the approved plans
for the subject State Stormwater Permit is done on a case -by -case basis. Any other changes to
this project must be approved through this Office prior to construction. The issuance of this plan
revision does not preclude the permittee from complying with all other applicable statutes, rules,
regulations or ordinances which may have jurisdiction over the proposed activity, and obtaining a
permit or approval prior to construction.
If you have any questions concerning this matter, please do not hesitate to call me at [phone].
Sincerely,
C., VV4A' 3qle�
Chris Baker
Environmental Engineer
GDS/csb: S:IWQSIStormwaterlPermits & Projects120091090217 LD12012 01 permit -Pr 090217
cc: Cynthia Wolf, P. E., Withers & Ravenel
New Hanover County Building inspections
Wilmington Regional Office
Wilmington Regional Office One1:..
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 NOrthCarOlina
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748
Internet: www.newaterqual4.org )WA I lJ

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEIl+IENT PEMYU ' PLAN R sMSION APPLICATION FORM
1'his fora: may be photocopied for use as an original
I. GENERAL INFORMATION
1. Stormwater Management Permit Number: SIV8090217
2. Project Name: Olsen Park
3. Permit Holder's name (specify the name of the corporation, individual, etc.):
City of Wilmin" Parks Recreation and Downtown Services
4. Print Owner/Signing official's name and title (person legally responsible for permit):
Sterling Cheatham - CitX Manager
5. Mailing Address for person listed in item 2 above:
102 North Third Street
City:Wilmingban State•NC Zip:28402
Phone: (910 ) 341-7810 Fax: (910 ) 3415839
Email:ster m .cheath Gwilmin nn . v
II. PLAN REVISION INFORMATION
1. Summarize the plan revision proposed (attach additional pages if needed):
Adding Mircale Field to plan and revising Future BUA allcations
III. 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 DWQ Office that issued the permit
I. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original & 1 copy of the Plan Revision Application Form
• Two (2) copies of revised plans (must be revisions of original approved plan sheet(s))
If AR.AdBg for Express review (only available in 20 coastal coginties)•
• Application fee of $500.00 (made payable to N®ENR)
VI. APPLICANT'S CERTIFICATION
L (print or type name of person listed in General Information, item 3) Sterl inu Chea than
certify that I have authorized these plan revisions and that the information included on this plan revision
application is, a best of my knowledge, correct and complete. /
Signature: Ad, aU�C���
�(r M
Plan Revision Form Rev 13July2010 Page 1 of 1 I DEC 0 9 2011

Permit Name•.
(to be provided by DWQ)
Drainage Area Number:`
Grassed Swale Operation and Maintenance Agreement
I will keep a mairn.termwe record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BM?.
IMPortantmaintena.rice-pr-ocedures:
- The drainage area of the grassed swale will be carefully managed to reduce the
sediment load to the grassed swale.
- After the first-time fertilization to establish the grass in the swale, fertilizer will
not be applied to the grassed swale.
The grassed swale will be inspected once a quarter. Records of operation and
maintenance will be kept in a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potential problem.
How I will remediate theproblem:
The entire length of the
swale
Trash/debris is present.
Remove the trash/debris_
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then re -sod
(or plant with other appropriate
species) and water until established.
Provide lime and a one-time
fertilizer applicatkm.
Sediment covers the grass at
the bottom of the swale.
Remove sediment and dispose in an
area that will not impact streams or
BMPs. Resod if necessary.
Vegetation is too short or too
long,
Maintain vegetation at a height of
approximatelyapproxmate-ly six inches.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1786.
RECEIVED
7 Q 2011
BY:
Form SW401-Grassed Swalc O&M-Rev-3 Page 1 of 2

Permit Number:
(to be provided by D WQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:Olsen Park
BMP drainage area number.1
Print name:City of Wilmington Parks Recreation and Downtown Services
Title:Sterling Cheatham - City Manager
Address:102 North Third Street, Wilmington, NC 28402
Date:--
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has boon named the president.
I, LI Z a Notary Public for the State of
No,r lg-n Zo e, County of S GcJ; CA , do hereby certify that
` personally appeared before me this
day of ,2A1r , and acknowledge the due execution of the
forgoing i ssed swale maintenance requirements. Witness my hand and official seal,
�IIINIII„
```���5� 1N E [ c
S% N �� a
x pOT
V�/ C *
s
1/MINI{
SEAL
My commission expires��
DEC 0 9 2011
Form SW401-Grassed Swale O&M-Rev.3 Page 2 of 2

Permit Number. `5' �, -7
On he nmvided by WO) /
F
0 T-
>' `� "LN
NCDENR a�
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must he filled out, printed and submitted.
The Required Items Checklist (Part lll) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT WFORNATION
Project name
Contact name
Phone number
Date
Drainage area number
tt. DESIGN 1NV0RMATt0N Site Characteristics
Drainage area
Impervious area
Percent impervious
Design rainfall depth
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post -development 10-yr storm peak flow
Velocity
Maximum non -erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiaarass
Kentucky bluegrass
Grass -legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale, Seekinq Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
Olsen Park -Miracle Field
Garry S Pape, P.E.
910-442-7870
December 8, 2011
54,42 00 fe
33,96100 f?
62.6% %
1.50 inch
7.00 in
7.23 in/hr
6.20 ft3/sec
3.50 ft/sec
x
x
or N)
:1
ft
Y k N)
2.90 ft/sec
5.00
441,00 fr
Insufficient maximum velocity.
OK
OK
:Q SEAL
• 031315 ;
.Q Q•
*G I N'ee�
�'�i�RRY SI• ?�\���
VEiJ
DEC 0 9 2011
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 1 of 2

Permit Number:
(to be provided by D WQ)
Swale Cifaracteristics
Swale Shape: Enter an 'Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
5.00 It
Width of the top of the swale
17.00 ft
Ndditionai Information
Is the swale sized for all runoff from ultimate build -out?
Y (Y or N)
OK
Is the BMP located in a proposed drainage easement with a
recorded access easement to a public Right of Way (ROW)?
Y (Y or N)
OK
What is the distance from the bottom of the swale to the SHWT?
1.77 ft
OK
What is the ground level elevation?
37.90 fmsl
What is the elevation of the bottom of the swale?
34 77 fmsl
What is the SHWT elevation?
33.00 fmsl
What is the longitudinal slope of the swale?
0.50 %
OK
What is the depth of freeboard?
1.50 ft
OK
5' AVE0
DEC 0 2011
BY:
Form SW401-Grassed Swale-Rev.3
Parts I and II. Project Design Summary, Page 2 of 2

Permit No:
(to be assigned by DWQ)
11L REQUIRED rrEms CHwws r
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package
will result in a request for additional information. This will delay final review and approval of the project. Initial in the space
provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below.
If a requirement has not been met, attach justification.
Initials
Pagel Plan
Sheet No.
i' K
1. Plans (1" = 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Swale dimensions (width, length, depth),
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Grass species, and
- Boundaries of drainage easement.
2. Plan details (1" = 50' or larger) for the grassed swale showing:
Swale dimensions (width, length, depth),
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Design at ultimate build -out,
Grass species,
- Off -site drainage (if applicable),and
Boundaries of drainage easement.
G" S
3. Section view of the grassed swale (V 20' or larger) showing:
- Side slopes,
- Longitudinal slope,
Freeboard
- Swale dimensions, and
- SHWT level(s)
4.
Supporting calculations (including maximum velocity calculations for applicable storms)
5.
A copy of the signed and notarized operation and maintenance (O&M) agreement.
•
_t �'
6. A copy of the deed restrictions (if required).
DEC 0 9 2A11
BY:
SW401-Grassed Swale-Rev.3 Part III, Page 1 of 1

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor
May 11, 2009
Sterling Cheatham, City Manager
City of Wilmington Parks, Recreation
102 North Third Street
Wilmington, NC 28402
Director
Subject: State Stormwater Management Permit No. SW8 090217
Olsen Park — Phase 1
Low Density Permit
New Hanover County
Dear Mr. Cheatham:
Dee Freeman
Secretary
The Wilmington Regional Office received a complete Stormwater Management Permit Application
for Olsen Park — Phase 1 on February 24, 2009 with additional information submitted on May 6, 2009.
Staff review of the plans and specifications has determined that the project, as proposed, will comply with
the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are
forwarding Permit No. SW8 090217, dated May 11, 2009, for the construction of the subject project.
This permit shall be effective from the date of issuance until rescinded and shall be subject to the
conditions and limitations as specified therein, and does not supercede any other agency permit that may
be required.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
If you have any questions please contact either M.J. Naugle or me at [phone].
Sinc ly,
Georgette Scott
Stormwater Supervisor
Division of Water Quality
GDS/mjn: S:1WQSISTORMWATERIPERMIT1090217 may09
cc: Jack D. Reel, P.E., Thomas & Hutton Engineering, 910-332-3360, fax: 3361
New Hanover County Building Inspections
City of Wilmington Development Services
Beth E. Wetherill, New Hanover County Engineering
Division of Coastal Management
NCDOT District Engineer
Wilmington Regional Office, DWQ Central Files, M.J. Naugle
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748 NorthCarolina
Internet wuuw.ncwaterqualiiy.org �Q'tura���
An Equal Opportunity 1 Affirmative Action Employer

State Stormwater Management Systems
Permit No.SW8 090217
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
LOW 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
Sterling Cheatham, City Manager and City of Wilmington
Olsen Park — Phase 1
Corporate Drive at 6035 Murrayville Road, Wilmington, New Hanover County
FOR THE
construction, operation and maintenance of a 24 % low density project in compliance with the
provisions of Session Law 2008-211 and 15A NCAC 2H .1000 (hereafter collectively and separately
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 Dart of this hermit
The Permit shall be effective from the date of issuance until rescinded and shall be subject to the
following specific conditions and limitations:
I. DESIGN STANDARDS
1. The project is permitted for 934,351 square feet of built -upon area. The BUA proposed for
Phase 1 is 262,231 square feet. A future BUA of 672,120 square feet is allocated as future
BUA.
2. The overall tract built -upon area percentage for the project must be maintained at 24% per
the requirements of the stormwater rules.
3. Approved plans and specifications for projects envered by this permit are incorporated by
reference and are enforceable parts of the permit.
4. Projects covered by this permit will maintain a minimum 50-foot-wide vegetative buffer,
measured horizontally from the normal pool of impounded structures, from the bank of each
side of streams or rivers, and from the mean high water line of tidal waters, perpendicular to
the shoreline.
5. All runoff directed into and through the vegetative buffer must flow through the buffer in a
diffuse manner. All runoff directed into wetlands shall flow into and through the wetlands in a
diffuse manner and at a non -erosive velocity.
6. The only runoff conveyance systems allowed will be vegetated conveyances such as swales
with minimum side slopes of 3:1 (H:V) as defined in the stormwater rules and approved by
the Division.
7. Where the flow rate in a swale exceeds 2 fps, a mechanism to prevent erosion and promote
diffuse flow shall be provided at the end of the swale, prior to discharging into the 50 foot
buffer, surface waters or wetiands.
Page 2 of 5

State Stormwater Management Systems
Permit No.SW8 090217
11. SCHEDULE OF COMPLIANCE
Swales and other vegetated conveyances shall be constructed in their entirety, vegetated,
and be operational for their intended use prior to the construction of any built -upon surface.
2. Filling in or piping of any vegetative conveyances (ditches, swaies, etc.) associated with the
development except for average driveway crossings, is strictly prohibited by any persons.
3. During construction, erosion shall be kept to a minimum and any eroded areas of the swaies
or other vegetated conveyances will be repaired immediately.
4. The permittee shall at all times provide the operation and maintenance necessary to operate
the permitted stormwater management systems at optimum efficiency to include:
a. Inspections
b. Sediment removal.
C. Mowing, and re -vegetating of the side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Maintenance of flow diffusion devices in accordance with approved plans and O&M.
5. 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 or alteration to any of the items shown on the approved plans, including
the stormwater management system, design concept, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the drainage
area.
e. Further subdivision, acquisition, or selling of the project area.
f. Filling in, altering or piping any vegetative conveyance shown on the approved plan.
6. The permittee shall submit all information requested by the Director or his representative
within the time frame specified in the written information request.
7. No piping shall be allowed except that minimum amount necessary to direct runoff beneath
an impervious surface such as a road and that minimum amount needed under driveways to
provide access to lots.
8. The permittee is responsible for verifying that the proposed built -upon area does not exceed
the allowable. built -upon area. Once the lot transfer is complete, the built -upon area may not
be revised without approval from the Division of Water Quality, and responsibility for meeting
the built -upon area limit is transferred to the individual property owner, provided that the
permittee complies with the requirements of Section 11.10 and 11.11 of this permit.
9. Within 30 days of completion of the project, the permittee must certify in writing that the
project's stormwater controls, and impervious surfaces have been constructed within
substantial intent of the approved plans and specifications. Any deviation from the approved
plans must be noted on the Certification.
10. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick,
stone, slate, and coquina, but does not include raised, open wood decking, or the water
surface of swimming pools.
11. All roof drains shall terminate at least 50 feet from the normal pool of impounded structures,
the bank of each side of rivers and streams, and the mean high water line of tidal waters.
Page 3 of 5

State Stormwater Management Systems
Permit No.SW8 090217
12. 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.
13. All stormwater conveyances will be located in either dedicated rights -of -way (public or
private), recorded common areas or recorded drainage easements. The final plats for the
project will be recorded showing all such required easements, in accordance with the
approved plans.
14. Prior to the development of any future area or additional phase noted on the approved plans
that has a BUA allocation under this permit, a permit modification must be submitted to and
approved by the Division. The modification must demonstrate that the built -upon area does
not exceed the maximum amount permitted under this permit and that it meets the intent of
low density development per the stormwater rules and available guidance.
III. GENERAL CONDITIONS
Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Water Quality, in accordance with
North Carolina General Statutes 143-215.6A to 143-215.6C.
2. The permit issued shall continue in force and effect until modified, revoked or terminated.
3. The permit may be modified, revoked and reissued or terminated for cause. The fling of a
request for a permit modification, revocation and re -issuance, or termination does not stay
any permit condition.
4. The issuance of this permit does not prohibit the Director from reopening and modifying the
permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws,
rules, and regulations contained in Title 15A of the North Carolina Administrative Code,
Subchapter 2H.1000; and North Carolina General Statute 143-215.1 et. al.
5. The permit is not transferable to any person or entity except after notice to and approval by
the Director. The Director may require modification or revocation and re -issuance of the
permit to change the name 'and incorporate such other requirements as may be necessary.
A completed Name/Ownership Change Form, signed by both parties involved, must be
submitted to the Division of Water Quality accompanied by the supporting documentation as
listed on page 2 of the form. The approval of this request will be considered on its merits,
and may or may not be approved.
6. The permittee is responsible for compliance with all permit conditions until such time as the
Division approves the permit transfer request. Neither the sale of the project nor the transfer
of common area to a third party constitutes an approved transfer of the stormwater permit.
7. 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. If any of those permits result in
revisions to the plans, a permit modification must be submitted.
8. The permittee grants permission to DENR Staff to enter the property during business hours
for the purposes of inspecting the stormwater management system and its components.
9. The permittee shall notify the Division in writing of any name, ownership or mailing address
changes at least 30 days prior to making such changes.
Page 4 of 5

State Stormwater Management Systems
Permit No.SW8 090217
10. Unless specified elsewhere, permanent seeding requirements for the swales must follow the
guidelines established in the North Carolina Erosion and Sediment Control Planning and
Design Manual.
Permit issued this the eleventh day of May 2009.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
---- -- ---- ---- --- — ---------------
for Colee . Sullins Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 5

D t
Date Received
Fee Paid
Permit Number
Z(04
09
14 # es�ez°
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality R-C ,TVMD
STORMWATER MANAGEMENT PERMIT APPLICATION FdR--mO 4 2009
This form may be photocopied for use as an original
BY:
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
City of Wilmington Parks, Recreation and Downtown Services
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Sterling Cheatham, City Manager
3. Mailing Address for person listed in item 2 above:
102 North Third Street
City:Wilmington State:NC Zip:28402
Phone: 910 ) 341-7810 Fax: (910 ) 341-5839
Email: [e-mail]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Olsen Park - Phase 1
5. Location of Project (street address):
R�
Phase 1 entrance located at the south end of Corporate Drive (S R 2653) & b3
City:Wilmington County:New Hanover Zip:28405
6. Directions to project (from nearest major intersection):
Heading North on N.C. Highway 132, turn Right onto SE Northchase Parkway (S R 2257) and travel East for
approximately 1,845 Feet to Corporate Drive (S.R. 2653). Turn Right onto Corporate Drive and travel South for
approximately 2,152 Feet. Site entrance is located at end of Corporate Drive
7. Latitude:34° 17 56" N Longitude:77° 51' 58" W of project
8. Contact person who can answer questions about the project:
Name:Tack D. Reel, Thomas & Hutton En ' eering Telephone Number: (910 ) 332-3360
Email:[e-mail]
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
❑Renewal ❑Modification
Form SWU-101 Version 09.25.08 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
®Low Density []High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑LAMA Major ,Sedimentation/Erosion Control Z404/401 Permit ®NPDES Industrial Stormwater
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Two stormwater basins are designed to help meet overall stormwater "quantity" for County. State: sheet flow to
vegetated swales.
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Property Area: 89.4 +/- acres 4. Total Coastal Wetlands Area: 0 acres
5. Total Property Area (3) — Total Coastal Wetlands Area (4) = Total Project Area**:_ 89.4 +/- acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): 24
7. How many drainage areas does the project have? 1
1.1
Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
For high density projects, co m lete the table with one drainage area for each engineered stonnwater device.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
Unnamed Tributary of Smith Creek
Stream Class & Index No.
C; SW 18-74-63
Total Drainage Area (sf)
3,893,129 sf
. l
On -site Drainage Area (sf)
3,893,129 sf
Off -site Drainage Area (sf)
0
Existing Impervious* Area (sf)
0
Proposed Impervious *Area (sf)
934,351 sf
% Impervious* Area (total)
24 %
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (sf)
9,205 sf
On -site Streets (sf)
70,873 sf
On -site Parking (sf)
96,980 sf
On -site Sidewalks (sf)
34,855 sf
Other on -site (sf) a0 a
�� p \—� sf
sf
Total (sf):
934,351 sf 2(,151"
Rik es
" Impervious area is defined as the built upon area including, but not limited to, building r6W9,)dJ5tftas,
sidewalks, gravel areas, etc.
SAY d 6 2009
Form SWU-101 Version 09.25.08 Page 2 of 4 BY'

9. How was the off -site impervious area listed above derived?
Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located
within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater
requirements.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following property restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
Forms can be downloaded from http://h2o.enr.state.nc.us/su/bml2 forms.htm - deed restrictions.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded property restrictions and protective covenants for this
project shall include all the applicable items required in the above form, that the covenants will be binding on
all parties and persons claiming under them, that they will run with the land, that the required covenants
cannot be changed or deleted without concurrence from the NC DWQ, and that they will be recorded prior to
the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater Permitting Unit at [phone] for the status and
availability of these forms. Forms can be downloaded from http://h2o.enr.state.nc.us/su/bmp forms.htm.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Form SW401-Cistern
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Cistern Supplement
Form SWU-101 Version 09.25.08 Page 3 of 4

e
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at httn://h2o.enr.state.ne.us/su/msi maps.htm)
1. Please indicate that you have provided the following required information by initialing in the space provi.d.ed
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• Original and one copy of the Deed Restrictions & Protective Covenants Form (if
required as per Part IV above)
• Original of the applicable Supplemenrm(s) and O&M agreement(s) for each BMP G�o�
• Permit application processing fee o $50 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/management
• Copy of any applicable soils report K
• Two copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm)
Designated agent (individual or firm):Thomas & Hutton Engineering Co WA M3 Kl -TA OZ
Mailing Address:219 Station Road, Suite 101
City:Wilmingion State:NC Zip:28405
Phone: (910 ) 332-3360 Fax: (910 ) 332-3361
Email:[e-mail]
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Sterling Cheatham
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 21-1.10��/
Signature: Date:
Form SWU-101 Version 09.25.08 Page 4 of 4

Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
S T ORMWA T ER MANAGEMENT PERMIT APPLICATION FORM
LOW DENSITY SUPPLEMENT
This form may be photocopied for use as an original
A low density project is one that meets the appropriate criteria for built upon area and transports stormwater
runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater
collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can be
found in 15A NCAC 2H .1005 through .1007, DWQ BMP Manual (2007), and Session Law 2006-246.
I. PROJECT INFORMATION
Project Name : Olsen Park - Phase 1
Contact Person: Sterling Cheatham, City of Wilmington Manager_ Phone Number: ( 910 )341-7810
Number of Lots: I Allowable Built Upon Area Per Lot*: 262,231 SF
*If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon area
for each lot. The attachment must include the project name, phase, page numbers and provide area subtotals
and totals. BUA shall be shown in units of square feet.
II. BUILT UPON AREA
See the Stormwater Management Permit Application for specific language that must be recorded in the deed
restrictions for all subdivisions.
For uniform lot sizes, complete the following calculation in the space provided below where:
• SA Site Area - the total project area above Mean High Water. Wetlands may be excluded when the
development results in high density pockets.
• DF Density Factor - the appropriate percent built upon area divided by 100.
• RA Road Area - the total impervious surface occupied by roadways.
• OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc.
• No. Lots - the total number of lots in the subdivision.
• BUA/Lot - the computed allowable built upon area for each lot including driveways and impervious surfaces
located between the front lot line and the edge of pavement.
46
FEE 2 4 2009
Form SW401-Low Density-Rev.2 Page 1 of 3 BY:

F1
No. Lots Lot
Calculation:
(SA: ft2 x DF: ) — (RA: ft2) — (OA: ft2) = BUA per Lot = ft2
(No of Lots: )
Max BUA = 3,893,129 sf x 0.24 = 934,351 sf
Proposed BUA = 262,231 sf < 9-34, 351 s-f 1D s
Mw...
III. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate that the following requirements have been met and supporting
documentation is provided as necessary. Indicate the page or plan sheet number where supporting
documentation can be found. If the applicant has designated an agent on the Stormwater Management Permit
Application Form, the agent may initial below.
Page/Plan
Initials Sheet No.
ALG a. A,30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse,
Tar -Pamlico, Catawba River basins, and Randleman Lake may require additional buffers.
N/A b. Deed restriction language as required on form SWU-101 shall be recorded as a restrictive
covenant. A copy of the recorded document shall be provided to DWQ within 30 days of
platting and prior to sale of any lots.
ALG Included c. Built upon area calculations are provided for the overall project and all lots.
N/A d. Project conforms to low density requirements within the ORW AEC (if applicable).
[15A NCAC 2H .1007(2)(b)]
ALG e. Side slopes of swales are no steeper than 3:1.
ALG calcs . f. Longitudinal slope of swales is no greater than 5%; calculations for shear stress and velocity
are shown if slope is greater than 5%.
ALG calcs . g. Swales are designed to carry, at a non -erosive velocity, at least the 10-year storm.
ALG h. Swale detail and permanent vegetation is specified on the plans.
Form SW401-Low Density-Rev.2 Page 2 of 3

r
IV. SWALE SYSTEM MAINTENANCE REQUIREMENTS
1. Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches
at any time.
2. Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up,
erosion, and trash accumulation.
3. Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded
following sediment removal.
4. Eroded areas of the swales will be repaired and reseeded. Swales will be revegetated as needed and in a
timely manner based on the monthly inspections.
5. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every
significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts,
velocity reduction devices and piping.
6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality.
I acknowledge and agree by my signature below that I am responsible for the performance of the six
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: Sterling Cheatham Cily of Wilmington Manager
Address: 102 North Third Street, Wilmington, NC 28402
Phone:
Signature:
Date: /,-/ 3 - %2
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.
a Notary Public for the State of // , County of
O.Lcr /1 , do hereby certify that personally appeared before me this
day of 4ALjWA,4,y � j2o? , and acknowledge the due execution of the forgoing infiltration basin maintenance
97
requirements. Witness my hand and official seal,
My commission expires jjo
_T•
Form SW401-Low Density-Rev.2 Page 3 of 3

ITMA
of W A4g9
4J
��
NCDENR
r
Q
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO
ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
PROJECT INFORMATION
Project name
OLSEN PARK - PHASE 1
Contact name
Jack Reel, PE
Phone number
910-332-3360
Date
Feb. 23, 2009
Drainage area number
B-Swale 1
[DfSIGNINFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Depressed area for flood control designed with 15" Drainage Pipe
Drawdown flow from the BMP
7.00 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area
ft, Do not complete this section of the worksheet.
Impervious surface area
ft, Do not complete this section of the worksheet.
Percent impervious
% Do not complete this section of the worksheat.
Rational C coefficient
Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm
cfs Do not complete this section of the worksheat.
Time of concentration
min
Rainfall intensity, 10-yr storm
in/hr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm
cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of dense gro er
>atdownslope
ded vegetation
downslope base !p
top of the receiving water
el lip to to top of bank)
s present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
N (Y or N)
N (Y or N)
Y (Y or N) Please complete filter strip characterization below.
N (Y or N)
Discharges to wetlands and non SA stream. Fitter strip not required.
ACA- &R� CC'W_ ?e c- W C-DemR c vwNa r 'P
o.00ft VUvw�
0.00 ft e to.-4 x n4oct) "�F, 4W ; s rock'
0.00 ft I
0.00 fmsl •e+ -}� txsc.�r�a►Mo��, l�
% #DIV/o!
N ,N)
sq ft No forebay is needed.
#DIV/0! ft/cfs
N
(Y or N)
Y
(Y or N)
N
(Y or N)
7.00
cfs
N
(Y or N) A bypass device is not needed.
BY:
#DIV/0!
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 2

Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
f"l
91.00 ft
#VALUEI
N (Y or N)
(Y or N)
Do not complete this section of the worksheet.
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
w
1 B 1
cis Do not complete this section of the worksheet
Do not complete this section of the worksheet
i 1
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 2

Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project: Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initi Is Sheet No.
72* e4Wt. Plans (1" - 50' or larger) of the entire site showing:
iF'yJ,4&-. jK
- Design at ultimate build -out,
5*cwgkr
- Off -site drainage (if applicable),
Cm c'-40m
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROM, and
- Boundaries of drainage easement.
4%1&� CB, 2. Plan details (1" = 30' or larger) for the level spreader showing:
C16 44 Phi - Forebay (if applicable),
- High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
Design at ultimate build -out.
_Cre 3. Section view of the level spreader (1" = 20' or larger) showing:
Underdrain system (if applicable),
- Level lip,
Upslope channel, and
�° �'p4 Downslope filter fabric.
a-leg4. A date -stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
lit
5. A construction sequence that shows how the level spreader will be protected from sediment until the
VCft 0"rentire drainage area is stabilized.
Ge' To%L V'1 ,%�i �.�c-'I
fhe su�iporting calculatior�5.
* f 6- 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
'-fil k 8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1

Permit Number: / /
(to be provided by DWQ)
Drainage Area Number: —1 --W f E
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate the problem:
The entire filter strip
Trash/debris is present.
Remove the trash/debris.
system
The flow splitter device
(if applicable)
The flow splitter device is
dogged.
Unclog the conveyance and dispose
of any sediment off -site.
The flow sputter device is
Make any necessary repairs or
damaged.
replace if damage is too large for
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3

BMP element:
Potentialproblem:
How I will remediate theproblem:
The swale and the level
lip
The swale is clogged with
sediment.
Remove the sediment and dispose
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it.
water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
bypass channel is needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
if applicable).
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem' soils, hydrology, disease;
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality local Regional Office, or the
outlet.
401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems wih the system or prior to any changes to the system or responsible party.
Project name:Olsen Park -
BMP drainage area number:
Print name: Sterling Cheatham
Title: City Manager
Address: 102 North Third Street, Wilmington, NC 28402
Phone: [phone]
_.
Signature: d.7f . - (AUW'
Date: 2W zu 9
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, ZeL= BLA-- , a Notary Public for the State of
/f 6rK &.wtk, County of do hereby certify that
%tea personally appeared before me this
day of, and acknowledge the due execution of the
forgoing filter strip, ri arian buffer, and/or a der maintenance re uirements.
Witness my hand and official seal,
I " , -- A
W'iANCyEk �t�NTY V4
SEAL
My commission expires
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3

of wnTFq
AC*A
NCDENR
O T
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
PWACT
Project name
OLSEN PARK - PHASE 1
Contact name
Jack Reel, PE
Phone number
910-332-3360
Date
Feb. 23, 2009
Drainage area number
B-Pond 2 .
Lil. DESIGN INFORMATM
For Level Spreaders Receiving Flow From a WAP
Type of BMP
Pond and Control Structure for flood control designed with 24" Drainage Pipe
Drawdown flow from the BMP
2.00 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area
—ft' Do not complete this section of the worksheet.
Impervious surface area
ff Do not complete this section of the worksheet.
Percent impervious
% Do not complete this section of the worksheet.
Rational C coefficient
Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm
cfs Do not complete this section of the worksheet.
Time of concentration
min
Rainfall intensity, 10-yr storm
in/hr Do not complete this section of the worksheet.
Peak flow from the 10-yr storm
cfs Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
WicQh of grass
Width o se ground cover
Width of woodel elation
Total width
Elevation at downslope base of le
Elevation at top of bank of eivil
Slope (from lev o top of bank)
Are raws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
N (Y or N)
N (Y or N)
Y (Y or N) Please complete filter strip characterization below
N (Y or N)
Discharges to wetlands and non SA stream. Filter strip not required.
o.00 ft 'l�aa�a l sec �r'a� S• 1 a p•��� r4 e 4., � `.� �
0.00 ft C- S+riP
0.00 fmsl
0.00 fmsl S?""4c- lS O i' -I-e
#DIV/01 % #DIV/01
N (Y or N) OK
sq ft No forebay is needed.
#DIV/01 ft/cfs
N (Y or N) FEB 2 4 2009
Y (Y or N) BY:
N (Y or N)
2.00 cfs #DIV/0!
N (Y or N) A bypass device is not needed.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and Il. Design Summary, page 1 of 2

Ung`th of the level lip 26.00 ft #vALUEI
Are level spreaders in series? N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
(Y or N)
Do not complete this section of the worksheet.
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
ft
Do not complete this section of the worksheet.
cfS
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
* W f
t-----------!-T•Y----------i 1
M M
i B i
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 2

RWUIRED ITEMS CHECKUST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Paget Plan
Initi Is Sheet No.
PO_P�t, Plans (1 ° - 50' or larger) of the entire site showing:
Ejbr4. jK
- Design at ultimate build -out,
%cWq .r
- Off -site drainage (if applicable),
Ca ftwerw4m
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
4%@IL� C8 2. Plan details (1 " = 30' or larger) for the level spreader showing:
Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build-out.
j
3. Section view of the level spreader (1" 20' or larger) showing:
.1(0 z4-Ci1 g
Underdrain system (if applicable),
Level lip,
Upslope channel, and
- Downslope filter fabric.
4. A date -stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
5. A construction sequence that shows how the level spreader will be protected from sediment until the
1P&1rentire drainage area is stabilized.
�S_NwVW. Y. e��A�
fhe su�'portingq calculatio
91 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1