NCS000460_Knightdale MS4 Permit Renewal Application 2_20210823

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SWU-264 June 17, 2015
NPDES STORMWATER PERMIT RENEWAL APPLICATION FORM

This application form is for use by Local Governments seeking NPDES stormwater permit coverage for
Regulated Public Entities (RPE) pursuant to Title 15A North Carolina Administrative Code 2H .0126. A
complete application package includes this form and one copy of a Narrative of The Stormwater
Management Program. The required Narrative of The Stormwater Management Program is described
in Section VII of this form.

I. NAME OF LOCAL GOVERNMENT, PERMIT NUMBER, AND EXPIRATION DATE

Name of Local Government

Town of Knightdale
Permit Number

NCS000460
Expiration Date

11/30/2016

II. CO-PERMIT APPLICATION STATUS INFORMATION
(Complete this section only if co-permitting)

a. Do you intend to co-permit
with another regulated public
entity?
Yes No
b. If yes, name of regulated
public entity N/A
c. If yes, have legal
agreements been finalized
between the co-permittees?
Yes No

III. RELIANCE ON ANOTHER ENTITY TO SATISFY ONE OR MORE OF YOUR PERMIT
OBLIGATIONS (If more than one, attach additional sheets)

a. Do you intend that another
entity perform one or more
of your permit obligations?
Yes No
b. If yes, identify each entity and the element they will be implementing
 Name of Entity Wake County Environmental Services
 Element they will
implement
Construction Site Stormwater Runoff Control
 Contact Person Glenn Johnson
 Contact Address 337 S. Salisbury St. Raleigh, NC 27602
 Contact Telephone
Number
[phone]
c. Are legal agreements in
place to establish
responsibilities?
Yes No

NPDES RPE Stormwater Permit Application

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SWU-264 June 17, 2015
IV. DELEGATION OF AUTHORITY (OPTIONAL)

The signing official may delegate permit implementation authority to an appropriate staff member.
This delegation must name a specific person, their title/position. Documentation of board action
delegating permit authority to this person/position must be provided.

a. Name of person to which permit
authority has been delegated

b. Title/position of person above

V. SIGNING OFFICIAL’S STATEMENT

If authority for the NPDES stormwater permit has been appropriately delegated through
board action and documented in this permit application, the person/position listed in Section
IV above may sign the official statement below.

I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.

Signature
Name Hal Mason
Title Interim Town Manager
Street Address 950 Steeple Square Court
PO Box
City Knightdale
State North Carolina
Zip 27545
Telephone [phone]
E-Mail [e-mail]

VI. LOCAL GOVERNMENT CONTACT INFORMATION

Provide the following information for the person/position that will be responsible for day to day
implementation and oversight of the stormwater program.

a. Name of Contact Person Robbie Worrell
b. Title
c. Street Address 950 Steeple Square Court
d. PO Box
e. City Knightdale
f. State North Carolina
g. Zip 27545
h. Telephone Number [phone]
j. E-Mail Address [e-mail]
NPDES RPE Stormwater Permit Application

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SWU-264 June 17, 2015
VII. NARRATIVE STORMWATER MANAGEMENT PROGRAM

Attach one copy of a narrative describing the stormwater management program. The report must
be presented in the following order.

1. Population and Estimated Growth Rate
2. Jurisdictional Area
3. Describe Stormwater Conveyance System
4. Estimated Land Use
5. Identify the Receiving Streams
6. Identify TMDLs (if applicable)
7. Identify impaired streams, likely sources, and existing programs that address the impairment
(if applicable)
8. List any existing water quality programs
9. Identify and describe any partnerships and/or inter-local agreements
10. Describe any state programs
11. Identify any other entity that the regulated public entity relies on to implement or manage its
stormwater program.
12. Identify points of contacts
13. Describe the public education and outreach program
14. Describe the public involvement and participation program.
15. Describe the Illicit Discharge Detection and Elimination Program.
16. Describe the post-construction stormwater program
Describe practices to inspect and maintain municipally-owned facilities
17. Describe practices to inspect and maintain structural stormwater control devices
18. Describe practices to reduce polluted stormwater runoff from municipally-owned streets,
roads, and public parking lots, piped and vegetative conveyances, manholes, cleanouts, drop
inlets, and drainage structures.
19. Describe any training programs for municipal staff.
20. Describe spill response procedures for those at Municipally Owned and/or Operated Facilities
as well as those in the public right-of-way.

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1. Storm Sewer Information

1.1. Population Served: 14,256

1.2. Growth Rate: 11.10%

1.3. Jurisdictional and MS4 Service Areas:

 Corporate Limits: 7.48 sq. mi.
 Extraterratorial Jurisdiction: 17.71 sq. mi.

1.4. MS4 Conveyance System:
The conveyance system for the MS4 consists primarily of collection in swales,
ditches, curb & gutter and underground piping with direct discharge to buffers
and streams. However, since the advent of the Town of Knightdale’s Phase II
Permit in 2005, we have required at least the detention of the 1-year, 24hr.
storm in designed structural BMPs (wetponds, dry detention basins, wetlands
etc.) prior to discharging into a receiving stream or conveyance system
already described.

1.5. Land Use Composition Estimates

 Commercial: 4.71%
 Industrial: 1.4%
 Residential: 20.65%
 Open Space: 73.23%

1.6. TMDL Identification

2. Receiving Streams

Receiving
Stream Name
Stream
Segment
Water Quality
Classification
Use
Support
Rating
Water
Quality
Issues 303(d) List
Beaver Dam
Creek 27-29 C:NSW Not Listed
Milburnie Creek 27-31 C:NSW Not Listed
Mango Creek 27-32 C:NSW Not Listed
Poplar Creek 27-35 C:NSW Not Listed
Marks Creek
(Lake Myra)27-38 C; NSW Not Listed

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3. Existing Local Water Quality Programs
3.1 Local Programs
Please find the table below as a summary of the locally implemented water
quality initiatives in the Town of Knightdale.
TABLE 3.1
Summary of Existing Local Programs - Town of Knightdale, North Carolina
Program Summary

Open Space
Protection
UDO Chapter
7.2, 7.3, 7.5,
and 2.4
Environmental
Survey - UDO
Chapter 16.2
Allows for the usage of centrally located, unencumbered land as
neighborhood open spaces. Significant stands of trees, stream bed areas, and
other valuable topographic features will be preserved within the recreational
open space areas where practical. Areas noted on any adopted Master Plan
as open space will be preserved and dedicated where practical and feasible
and may be left unimproved.
Chapter 7.3 outlines a matrix to calculate the amount of recreational open
space that must be dedicated, which varies, with the base amount being 580
square feet per bedroom. Up to half of the recreational open space must be
for passive recreation. Open space credits are provided for streets with
development on one side and recreation on other; also provided for historic
property preservation.
The Bike Route and Greenway Plan outlines planned bike routes and future
greenways.
The Open Space Preserve District is intended to protect areas that are
permanently preserved as natural and/or environmentally significant lands.
Such areas include rural parks, wetlands, and areas placed in a conservation
easement.
The Open Space and Greenway Plan is a comprehensive approach to link
green space lands and corridors to residential, commercial, institutional and
central business areas of the community, to define a concise set of strategies
for protecting and conserving these corridors and identify parcels and
corridors in need of protection.
Knightdale’s UDO Chapter 16.2 outlines requirements for environmental
survey associated with development activity which allows for the
identification of resources for protection.
Water Allocation Policy provides incentives to exceed open space
dedication requirements.

Riparian
Buffer
Protection
UDO Chapter
Neuse Buffer Rules apply.
Built-upon area to be 50 feet from perennial and intermittent streams.
The environmental survey requires the identification of watercourses and
buffers for preservation.
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6.3 and 6.5

Floodplain
Protection
UDO Chapter
6.5
FEMA requirements apply; ordinance applies to future flood elevations.
Areas of Special Flood Hazard are those identified by FEMA in its Flood
Insurance Rate Map(s) for the Town of Knightdale dated March 3, 1992. The
FIRM maps have been updated as of May 2, 2006. Structures must be located
2 feet above base flood elevation.

Erosion and
Sediment
Control
UDO Chapter
6.2

The Town of Knightdale has a contract with Wake County under which the
County oversees, administers, implements and enforces the erosion and
sediment control program for the Town.
Mass grading in residential developments is not allowed. The initial
clearing and grading of major residential subdivisions shall be limited to
dedicated public rights-of-way and easements for the installation of streets,
utilities, and other infrastructure.
Stormwater
and
Impervious
Surface
Limitations
UDO Chapter
6.3 and 16.13
Low-density development (<24 percent impervious) must implement
stormwater measures that control and treat the difference in stormwater
volume between pre- and post- development conditions for the 1-year, 24-
hour storm. High-density projects must also remove 85 percent of total
suspended solids.
Approval of stormwater permits requires enforceable restriction on property
usage to ensure that future development/redevelopment maintains the site
consistent with the approved project plans.
Ordinance requires annual maintenance and inspection of stormwater
BMPs. Homeowners Associations must establish escrow account for repair
of BMPs.
Member of NC Clean Water Education Partnership (CWEP) providing
stormwater education. CWEP ran educational TV ads on proper use of lawn
chemicals and vehicle maintenance.

3.2 State Programs
There are currently no state administered water quality programs within the
Town of Knightdale’s MS4 service area.
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4. Permitting Information

4.1 Responsible Party Contact List

Measurable Goal Contact
Public Education & Outreach
Public Involvment & Education
Ilicit Discharge Detection and Elimination
Post Construction Stormwater
Management in New Development and
Redevelopment
Pollution Prevention/Good Housekeeping
for Municipal Operations
Construction Site Stormwater Runoff
Control
Glenn Johnson
Wake County Envrionmental
Services
Phone: [phone]
Fax: [phone]
e-mail:
[e-mail]
Robbie Worrell
Public Works Director
Phone: [phone]
Fax: [phone]
e-mail:
[e-mail]

4.2 Organizational Chart - See Enclosure (1)
4.3 Signing Official – Hal Mason, Interim Town Manager
4.4 Duly Authorized Representative - None

5. Co-Permitting Information – Not Applicable

6. Reliance on Other Government Entity

6.1 Name of Entity – Wake County Environmental Services
6.2 Measure Implemented – Construction Site Stormwater Runoff Control
6.3 Contact Information:

Glenn Johnson
Sedimentation & Erosion Control Section
Wake County Environmental Services
336 Fayetteville Street
Raleigh, NC 27602
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
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7. Stormwater Management Program

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7.1 Public Education and Outreach

A. Objectives for Public Education and Outreach

 Distribute educational materials to the community
 Conduct public outreach activities
 Raise public awareness on the causes and impacts of stormwater pollution
 Inform the public on steps they can take to reduce or prevent stormwater
pollution.

B. Target Pollutant Sources:

 Lawn & Gardening
 Vehicle Washing
 Stream Buffers
 Litter

C. Target Audiences

 Homeowners/HOAs- Account for over 78% of the developed acreage within
Town Limits.
 Developers – Construction activities and offsite sedimentation lead to stream
water degradation.
 Civic Organizations – The action component of the stormwater through
community programs for stormwater.

D. BMPs

BMP Measurable Goal
Utilize Knightdale E-Views to distribute
stormwater information
Provide Stormwater Kiosk for at leat 2 public
events per yer
Set up display at Inspections front window with
signs and pahmplets about stormwater
Run stormwater ad campaings on East Wake
TV
(b) Community
Events
Organize at least one stream or litter cleanup
per year with volunteers from local
organizations
(c) Outreach Organize and participate in four classroom
events per year for the purpose of stormwater
education
(a) Distribute
Educational
Material
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7.2 Public Involvement and Participation

A. Objectives for Public Involvement & Participation

 Provide Opportunities for the public to participate in program development
and implementation
 Comply with applicable state and local notice requirements.

B. BMPs

BMP Measurable Goal
(a) Public Meetings Hold at least one public meeting per year to
review the Town's stormwater plan
(b) Public
Involvement
Establish Stormwater Steering Committee
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7.3 Illicit Discharge Detection and Elimination

A. Objectives for Illicit Discharge Detection and Elimination

 Detect and eliminate illicit discharges, including spills and illegal dumping.
 Address significant contributors of pollutants to the MS4.
 Implement appropriate enforcement procedures and actions.
 Develop a storm sewer system map showing all outfalls and waters receiving
the discharges.
 Inform employees, businesses and the general public of hazards associated
with illegal discharges and improper disposal of waste.

B. Storm Sewer Base Map

In 2013, the Town of Knightdale contracted Withers & Ravenel to complete a
stormwater system map. This map is scalable and will be maintained by receiving
as-built drawings of all new stormwater infrastructure.

C. Regulatory Mechanism: Town of Knightdale Unified Development Ordinance
Adopted on November 16th, 2005, Chapter 6 and 18.

D. Enforcement

Any person or entity found to be responsible for an Illicit Discharge will first be
notified with a Correction Letter outlining the violation and specific time period
allowed to correct the violation. If the violation is not corrected within specified
time, the Land Use Administrator may act to impose one or more of the penalties
outlined in UDO Section 18.4

E. Detection and Elimination

The Town of Knightdale’s Illicit Discharge Detection and Elimination Program is
in its infancy, and relies heavily on input and reports from the Citizenry. In order
to proactively manage an inspection program, the storm drainage network must
first be identified. The Town currently lacks mapping necessary to develop such
a comprehensive and proactive approach to managing illicit discharges.

F. Outreach

Training on Illicit Discharges for public employees will be integrated into the
Pollution Prevention & Good Housekeeping component of the Phase II permit.
The general public will receive information though public meetings,
advertisements and the Town’s website as part of the Public Education
component of the Phase II permit.

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G. BMPs

BMP Measurable Goal
(a) Stormwater
Map
Develop a digital, GIS based stormwater map
scalable to the needs of Knightdale as it
expands
(b) Illicit Discharge
Police
Develop a written illicit discharge procedure
that amplifies the guidance in the Knightdale
UDO
(c) Implement illicit
discharge detection
procedures
Implement an inspection program to detect dry
weather flows at system outfalls.
(d) Conduct
Employee Cross
Training
Conduct training for municipal staff on
detecting and reporting illicit discharges
(e) Provide Public
Education
Inform public employees, businesses and the
general public of hazars associated with illegal
discharges and improper disposal of waste
(f) Tracking
Database
Establish database to capture the geographic
location of and the disposition of all public
complaints and/or reports of illicit discharges.
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7.4 Construction Site Stormwater Runoff Control

A. Objectives for Construction Site Runoff Controls

 Reduce pollutants in stormwater runoff from construction activities disturbing
more than one acre of land surface and those activities less than one acre that
are part of a larger development.
 Provide procedures for public input, sanctions to ensure compliance,
requirements for construction site operators to implement appropriate erosion
and sediment control practices, review site plans which incorporate
consideration of potential water quality impacts, and procedures for site
inspection and enforcement of control measures.
 Establish requirements for construction site operators to control waste such as
discarded building materials, concrete truck washouts, chemicals, litter and
sanitary waste at the construction site that may cause adverse impacts to water
quality.
 Implement appropriate enforcement procedures and actions.
 Develop a storm sewer system map showing all outfalls and waters receiving
the discharges.
 Inform employees, businesses and the general public of hazards associated
with illegal discharges and improper disposal of waste.

B. Regulatory Mechanism

Wake County performs the Town of Knightdale’s sedimentation and erosion
control permitting, inspections and site management.

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7.5 Post Construction Stormwater Management in New Development
and Redevelopment

A. Objectives for Construction Site Runoff Controls

 Manage stormwater runoff from new development / redevelopment that drains
into the MS4 and disturbs an acre or more of the land surface, including
project less than an acre that are part of a larger common plan of development
or sale.
 Provide a mechanism to require long term operation and maintenance of
BMPs.
 Ensure controls are in place to minimize water quality impacts.

B. Regulatory Mechanism

Post Construction Stormwater Management in New Development and
Redevelopment is regulated through the Town of Knightdale’s Unified
Development Ordinance adopted November 16th, 2005 and the state BMP
Manual.

C. Operation and Maintenance

Prior to Certificate of Occupancy - The Town of Knightdale ensures long term
operation and maintenance of BMPs though the requirement of executed and
recorded operation and maintenance agreements and the posting of a maintenance
surety prior to the issuance of final Certificate of Occupancy and acceptance of
the BMP into service.
Post Construction – The Town of Knightdale requires surety renewals and BMP
inspections done by certified professionals to be conducted on each anniversary of
the acceptance of the BMP for service. The Town’s Engineering Staff also
performs routine and informal inspections at least twice a year and notifies the
owner operator of items needing immediate correction.

D. Natural Resource Protection – Please see Table 3.1
E. Open Space Protection – Please see Table 3.1
F. Tree Preservation – Please see Table 3.1

G. Redevelopment

The Town of Knightdale encourages infill development through the use of our
Water Allocation Policy (WAP). The WAP grants access to water through the
awarding of points assigned to development criteria selected to be important to
the Town. Infill development and development of Brownfield sites gains the
most points in the WAP.

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H. Development in Areas with Existing Infrastructure

The Town of Knightdale requires more intense zoning districts in areas where
existing infrastructure exists to proactively give direction to new development.
The Town also uses Extraterritorial Jurisdiction expansion to proactively impose
zoning in areas within our annexation boundaries.

I. Mixed-Use Development

The Town of Knightdale’s UDO is form based code, which by definition,
encourages mixed-use development and co-location of transit services.

J. Street Design

The Town of Knightdale’s standard street sections incorporate planted median
sections with dedicated left turn lanes at designated, and high priority
intersections with appropriate tapers, rather than continuous center turn lanes.
This practice reduces impervious area, while still allowing for appropriate traffic
flow and turning movements.

K. Green Infrastructure Elements and Street Design

The Town of Knightdale encourages green infrastructure elements through our
Water Allocation Policy (WAP). The WAP grants access to water through the
awarding of points assigned to development criteria, selected to be important to
the Town. Green infrastructure elements included in the WAP include, LEED
Site Credits, Cistern use for irrigation and Grey water use for toilets and urinals.

L. Reduced Parking Requirements

The Town of Knightdale’s UDO prescribes a maximum parking requirement for
each use. In the event that the owner/developer would like to exceed the
maximum allowance for parking, the request must be approved by Town Council,
and all parking spaces in excess of the maximum must be constructed of a
pervious pavement system.

M. Transportation Demand Management Alternatives

The Town of Knightdale’s UDO encourages alternatives though requiring parking
lots of 100 spaces or more to formally dedicate a percentage of parking spaces as
park & ride as well as all parking spaces in excess of the maximum must be
constructed of a pervious pavement system.

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N. Minimizing Stormwater from Parking Lots

The Town of Knightdale’s UDO requires bays of parking be no larger than 36
spaces and separated by a planted island, each parking space within 60’ of a tree,
any parking in excess of the specified maximum must be within 30’ of a tree, and
a 10’ Type A buffer screen the parking facility.

O. BMPs

P. Fawn Ridge Stream Restoration

 The Town has executed a construction contract to restore a tributary to Mingo
Creek into its original banks. The Town’s contractor will perform the work
which will help to minimize the risk of property damage and further erosion.

 This is the first project conducted under the Town’s Stormwater Utility Fund.
The project costs are approximately $170,000.

BMP Measurable Goal
(a) Stormwater
Management
Continue to actively manage the Town's
Stormwater management plan in accordance
with the requirements of the UDO
(b) Maintenance &
Inspections
Establish town intitated post contruction
inspection program for BMPs
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7.6 Pollution Prevention/Good Housekeeping for Municipal
Operations

A. Objectives for Pollution Prevention/Good Housekeeping

 Reduce or prevent stormwater pollution from Muncipal Operations

B. BMPs

BMP Measurable Goal
(a) Develop an
Operation and
Maintenance
Program
Develop and Operation and Maintenance
Program with the ultimate goal of reducing or
preventing pollutant runoff from municipal
operations
(b) Inspection and
Evaluation of
Facilities,
Operations, and the
MS4 System and
associated
structural BMPs
Develop an inventory of all facilities and
operations owned and operated by the
permittee with the potential for generating
stormwater runoff, including the MS4 system
and associated structural BMPs.
(c) Conduct Staff
Training
Conduct Staff Training once per year on Good
Houskeeping Practices and Pollution
Prevention