HomeMy Public PortalAboutExhibit MSD 37E-6 - Raleigh Stormwater Utililty Credit and Adjustment ManualManual
City of Raleigh,
North Carolina
Stormwater Utility
Credit and Adjustment Manual
February 2004
Revised October 2008
Table of Contents
City of Raleigh-Stormwater Utility Fee Credit and Adjustment Manual
Contents
Section 1 - Introduction.............................................................................................................. 1
1.1 Definitions ....................................................................................................... 1
1.2 Responsibility ................................................................................................. 5
1.3 Stormwater Management ............................................................................. 5
1.4 Stormwater Utility ......................................................................................... 6
1.5 Credits and Adjustments .............................................................................. 6
Section 2 – Appeals for Adjustment........................................................................................ 7
2.1 Impervious Area Measurement Adjustment ............................................. 7
2.2 Less than 400 Square Feet of Impervious Area Land Adjustment ......... 7
2.3 Partial Discharge Adjustment ...................................................................... 7
2.4 Process of Appealing for an Adjustment.................................................... 8
2.4.1 Eligibility of Adjustment................................................................ 8
Section 3 – Stormwater Fee Credit Opportunities................................................................ 8
3.1 Stormwater Facility Credit ........................................................................... 9
3.2 NPDES Credit ............................................................................................... 10
3.3 Eligibility for Credits ................................................................................... 11
3.3.1 Customers ...................................................................................... 11
3.3.2 Maintenance Agreement.............................................................. 11
3.3.3 Right of Entry ................................................................................ 11
3.3.4 Existing Stormwater Facilities..................................................... 12
3.3.5 Upgrades ........................................................................................ 12
3.4 Stormwater Facility Maintenance.............................................................. 12
3.4.1 Required Stormwater Pond Maintenance ................................. 12
3.5 Enforcement .................................................................................................. 14
3.5.1 Annual Documentation................................................................ 14
3.5.2 Facility Inspections ....................................................................... 14
3.6 Applying for a Stormwater Facility Credit .............................................. 15
3.6.1 Preliminary Interaction with the City ........................................ 15
3.6.2 Perform Hydrologic Analysis and Design Facility .................. 15
3.6.3 Complete Application .................................................................. 15
3.6.4 Construction of a New Stormwater Facility ............................. 16
3.6.5 Inspection of a New or Existing Stormwater Facility .............. 16
3.7 Applying for Credits for Existing Facilities ............................................. 16
3.8 Credit Renewal ............................................................................................. 16
3.8.1 Implementation of the Credit ........................................................... 16
3.8.2 Credit Applications for New Stormwater Facilities ................ 17
3.8.3 Credit Applications for Existing Stormwater Facilities........... 17
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Table of Contents
City of Raleigh-Stormwater Utility Fee Credit and Adjustment Manual
Appendices
Appendix A Forms, Instructions and Checklists for Adjustments........................ 18
Appendix B Forms, Instructions and Checklists for Credits.................................. 26
Appendix C Example Credit Calculations ................................................................ 39
Appendix D Example Design Calculations............................................................... 43
Appendix E Utility and Stormwater Ordinances..................................................... 49
Appendix F Utility Rate Resolution........................................................................... 67
Appendix G Council Approved Stormwater Credit and Adjustment Manual
Revisions………………………………………………………………….…………..70
ii
Section 1
Introduction
Section 1
Introduction
The purpose of this manual is to describe policies set forth by the City of Raleigh
concerning stormwater management service charge credits (Credits) and stormwater
management service charge adjustments (Adjustments). The City of Raleigh
Ordinance established a Stormwater Utility on November 5, 2003 with the passage of
Ordinance No. (2003)-537 (Stormwater Utility Ordinance) and Resolution No. (2003)-
888, revised by Resolution No. (2008) - 540. The Utility provides the City with the
authorization to establish and collect rates, fees, and charges for the services and
facilities provided by the City. Opportunities for Credits and Adjustments were also
created in the Utility Ordinance and this manual provides technical and
administrative assistance in applying for them.
The remainder of this section defines terms used throughout the manual and provides
background on stormwater management. Section 2 details the process for Stormwater
Fee Adjustments, while Section 3 describes the details of the Stormwater Fee Credit
Policy. Appendices A though F contain applications, instructions, checklists, and
relevant City Ordinances to assist Customers with Credits and Adjustments.
1.1 Definitions
All definitions as used in the credit manual, unless the context clearly indicates
otherwise, shall have the meanings assigned in the following sections. Words not
defined in this section will have the meaning given by common and ordinary use as
defined in the latest edition of Webster’s Dictionary.
Adjustment - An Adjustment is a change made to a Fee to correct an overcharge or an
undercharge of a customer’s stormwater management service charge.
City Standards – City Standards includes those standards for design, construction
and maintenance of stormwater facilities. These standards include the City’s
Stormwater Management Design Manual (http://www.raleigh-
nc.org/portal/server.pt?space=Dir&spaceID=1&parentname=CommunityPage&pare
ntid=0&in_hi_userid=2&control=OpenSubFolder&subfolderID=1788&DirMode=1 ),
the City Code,
http://www.municode.com/resources/gateway.asp?pid=10312&sid=33,
and all applicable City Ordinances.
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Section 1
Introduction
Credit - A Credit is a Fee reduction a customer receives for implementing practices
that mitigates the peak discharge or runoff pollution or decreases the City’s cost of
maintaining the system beyond City Code requirements.
Credit Application - Credit Applications are those applications for New or Existing
Stormwater Facilities.
Customer - Customer is the person or entity to which a Fee is sent. Customers may
include the owner, occupant, or tenant of property, a homeowner's association with
responsibility for property or for common areas associated with property, or a person
or entity who has requested in writing to be the recipient of the Fee for a property.
Developed Land - Developed Land is real property that contains impervious surfaces
including improved land without structures and land on which improvements are
under construction.
Existing Stormwater Facility - Existing Stormwater Facilities are Stormwater
Facilities that were fully constructed and approved by the City before the inception of
the fee (i.e. March 1, 2004).
Fee – Fee is the Stormwater Management Service Charge applied to developed
property. The charge is based upon the single-family equivalent unit (SFEU) as
calculated for the property.
Impervious Area - Any surface which because of its material composition or
compacted nature impedes or prevents natural infiltration of stormwater into the soil.
Impervious surfaces include, but are not limited to, roofs, roof extensions, patios,
balconies, decks, streets, parking areas, driveways, sidewalks, and any concrete, stone,
brick, asphalt, or compacted gravel surfaces. For the purposes of this Manual, the
effective impervious covers for certain surfaces are listed below as follows:
(1) Asphalt, concrete, crusher-run gravel, masonry, marl, wood, and other
impermeable surfaces which prevent land area from infiltrating stormwater
are one hundred (100) per cent impervious.
(2) Porous surfaces which permit direct infiltration of unconcentrated
stormwater into ground areas which are prepared in accordance with plans
approved by the Stormwater Management Division of the City so that the first
one-half (1/2) inch of stormwater infiltrates into the ground are seventy (70)
per cent through ten (10) per cent impervious, depending on the following
variables, each of which is considered to provide a maximum reduction of ten
(10) percent for the contributing porous surface:
a. Compaction;
b. Condition of sub grade;
c. Extent of land disturbance;
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Section 1
Introduction
d. Extent of porous openings;
e. Protection from siltation and clogging;
f. Slope of ground area;
g. Volume of stormwater stored.
(3) Slatted wood decks that allow the drainage of water through the slats to an
unpaved surface below are fifty (50) per cent impervious. If the area covered
by the deck is washed gravel, the deck is thirty (30) per cent impervious.
(4) Ungraveled natural footpaths, water surfaces of lakes, streams, swimming
pools and drain fields are zero (0) percent impervious.
(5) All other determinations concerning impervious surfaces will be required to
be based on hydrological tests of the existing sub grade soils and
appropriate analyses of the slope, rainfall intensity, and rainfall duration.
A report for such determinations is required to be submitted to the
Stormwater Management Division for review and approval as to the per
cent imperviousness of the porous surface.
Maintain or Maintenance - This means any action necessary to keep stormwater
control measures and devices in proper working condition, so that such facilities will
continue to comply with State law and City Standards to prevent safety hazards, to
prevent public nuisances, and to prevent the failure of stormwater control measures
and devices and to function as credited. Maintenance includes activities identified on
approved stormwater control plans , any applicable stormwater operations and
maintenance manual, any applicable agreements or certifications to the City, and
those activities outlined in the City’s Stormwater Management Design Handbook or
City approved pond operations and maintenance manuals located at:
http://www.raleighnc.gov/portal/server.pt?space=Dir&spaceID=1&parentname=C
ommunityPage&parentid=0&in_hi_userid=2&control=OpenSubFolder&subfolderID
=3511&DirMode=1.
New Stormwater Facility - New Stormwater Facilities are Stormwater Facilities that
were fully constructed and approved by the City after the inception of the fee (i.e.
March 1, 2004).
Other Residential and Nonresidential Developed Land - This means any individual
lot or parcel of developed land that is not single-family developed land. It includes,
but is not limited to, land upon which there are residential structures that contain
more than one dwelling unit, such as multi-family dwellings (duplexes and greater),
manufactured home parks, condominiums, apartments, boarding houses, rooming
houses, fraternity houses, sorority houses, dormitories, churches; institutional
buildings, whether public or private; hospitals, rest homes, public and private
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Section 1
Introduction
schools, colleges, and universities, commercial, office, hotels and motels, industrial
buildings, storage areas, parking lots and land containing improvements under
construction or impervious surfaces.
Pre-Developed Conditions – The condition of a property before development on the
parcel occurs (i.e. forested or open space).
Post-Developed Conditions – The condition of a property following any development
activity on the parcel. For upstream areas, this refers to complete build-out
conditions, as determined from current zoning and the City’s Comprehensive Plan.
Property Owner (Owner) - Owner means the owner of a property as shown on the
Wake County or Durham County tax records.
Single-Family Equivalent Unit (SFEU) - An SFEU is the median amount of
Impervious Area on a single-family (detached home) developed land in the City as
established by City Council resolution.
Stormwater Facility (Facility) - A stormwater facility is any mechanism constructed
to manage stormwater quantity and/or quality. Another term used for a Facility is
Best Management Practice (BMP).
Stormwater Management Design Manual - The Design Handbook is a manual
provided by the City, which gives guidance in designing stormwater management
facilities and may be downloaded from the City of Raleigh at the following web
address:
http://www.raleigh-
nc.org/portal/server.pt?space=Dir&spaceID=1&parentname=CommunityPage&paren
tid=0&in_hi_userid=2&control=OpenSubFolder&subfolderID=1788&DirMode=1
Stormwater Management Service Charge (Fee) – The fee charged to provide
stormwater services to developed land. The fee is based upon the Single-Family
Equivalent Unit (SFEU) as calculated for that property.
Stormwater Management System (System) - System means the system of natural and
constructed devices for collecting, storing, transporting and/or treating stormwater.
It includes, but is not limited to, structural drainage systems such as catch basins,
pipes, inlets, storm sewers, drains, culverts, junction boxes, open swales and ditches,
and other stormwater management facilities that affect the quality and quantity of
stormwater located within dedicated open public street rights-of-way and City of
Raleigh permanent or public drainage easements accepted by the City.
Stormwater Management Utility Fund – Stormwater Management Utility Fund
means the Stormwater Management Service Charge and the interest generated by
those charges.
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Section 1
Introduction
Stormwater Ordinance - Stormwater Ordinance means Part 10, Chapter 9 of the
Raleigh City Code which details the City’s stormwater runoff and nitrogen policies.
This ordinance is also known as the Stormwater Control and Watercourse Buffer
Regulations.
Stormwater Services - Stormwater Services are City stormwater management
programs designed to control hydrology and protect water quality by controlling the
level of pollutants in, and the quantity and flow of, stormwater and City service of
structural and natural stormwater and management systems of all types. Stormwater
services include any cost necessary to assure that all aspects of stormwater quality
and quantity are managed in accordance with federal and State laws, regulations and
rules, and costs related to the construction, operation, maintenance, inspection,
management and regulation of the stormwater management system.
Stormwater Utility Ordinance – Stormwater Utility Ordinance means the City of
Raleigh Ordinance No. (2003)- 537, which establishes the stormwater management
utility.
1.2 Responsibility
The Stormwater Management Division is a division of the City’s Public Works
Department. The Stormwater Program Manager has responsibility for the operation
and maintenance of the Stormwater Utility. The Stormwater Program Manager also is
responsible for the organization and operation and maintenance staff, the planning
and assessment of the stormwater management system, enforcement of soil erosion
and sedimentation control regulations, flood prone area regulations, the Stormwater
Ordinance, and the management of capital improvement drainage programs. The
responsibility for billing of stormwater management service charges will be that of
Utility Billing, a division of the City’s Public Utilities Department. The amount of the
stormwater utility fee will be billed as determined by the Stormwater Program
Manager or his designee.
1.3 Stormwater Management
Development covers land with impervious cover, allowing less stormwater to
infiltrate than could under pre-development (natural) conditions. Increased
impervious cover leads to larger volumes and higher rates of stormwater runoff,
which pose a threat to the public health, safety, and welfare because, if unmanaged,
the increased runoff may flood emergency vehicle routes and properties, erode
watercourses and channels, and pollute streams and rivers.
Stormwater Management is the practice of managing stormwater runoff in order to
avoid water quantity and water quality problems. By mapping, planning,
constructing, operating, cleaning, regulating and maintaining natural and constructed
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Section 1
Introduction
stormwater management facilities, the City reduces the adverse effects of stormwater
and improves the quality of groundwater, streams, rivers, and lakes in and around
the City.
1.4 Stormwater Utility
In order to provide a stable source of funding for the City to provide Stormwater
Services, which benefit owners and occupants of developed land in the City and other
Raleigh citizens, the City has established a stormwater utility. It is administered
similar to a water or wastewater utility. As a water utility fee is proportional to the
demand for water by a Customer, the Stormwater Management Service Charge (Fee)
is proportional to the demand for Stormwater Services as measured by the amount of
Impervious Area on a property. Impervious Area is the single most important factor
affecting the peak rate of runoff, the total volume discharged, and pollutant loadings
of stormwater that flows from a property. The Stormwater Utility Ordinance, which
establishes the stormwater utility, is attached as Appendix E.
1.5 Credits and Adjustments
The City has established opportunities for Customers to receive Credits and
Adjustments in the Stormwater Utility Ordinance. Credits are associated with the
construction, operation, and maintenance of privately owned Stormwater Facilities
beyond the City Code required standards and which benefit the City. Adjustments
are Fee changes meant to correct discrepancies between the Fee paid by a Customer
and the stormwater runoff generated by the property.
Customers may qualify for Credit when they can demonstrate that their Existing or
New Stormwater Facility provides cost savings the City would otherwise incur as
part of City stormwater management efforts. Credits may only be applied to the
property where the Stormwater Facility is located. The Facility must comply with
Section 3 et seq. of this manual and exceed the minimum City requirements for
stormwater runoff control, which may be found in Section 10-9023 of the Stormwater
Ordinance (a.k.a. Part 10, Chapter 9 of the City Code Development Regulations,
Stormwater Control and Watercourse Buffer Regulations) and the Stormwater Design
Manual. In lieu of a credit, the City may also, at its discretion, negotiate a separate
contract with the Customer that would replace the “credit” for the facility.
The City has also established an appeals process that allows Customers to appeal for
Adjustment if they determine their Fee is applied in error as discussed in Section 6-
4008 of the Stormwater Utility Ordinance. Section 2 details the policy for Appeals for
Adjustment while Section 3 details the Credit opportunities available to Customers.
6
Section 2
Appeals for Adjustment
7
Section 2
Appeals for Adjustment
Adjustments may be available to a Customer through the appeals process specified in
the Stormwater Utility Ordinance (Section 6 – 4008 Appeal). An Adjustment is a
change made to a fee to correct an overcharge or an undercharge of a customer’s
Stormwater Management Service Charge. Adjustments are not to be confused with
Credits, which are intended reduce a fee by a percentage reflecting the System benefit
from Customer implemented stormwater management practices. Adjustment
opportunities are detailed below. The reader should not view this document as a sole
source but as a guide to assist in interpreting policies set forth in the Stormwater
Utility Ordinance and the Stormwater Ordinance. Customers must receive a Fee for
Stormwater Services provided by the City to be eligible for an Adjustment.
2.1 Impervious Area Measurement Adjustment
The City has applied County Tax Records and GIS technology to determine the
Impervious Area for all properties within the City Limits, using both direct
measurement for non-single family residential properties and statistical analysis for
single-family residential properties. If a Customer has reason to believe that the
Impervious Area for a property as reported by the City is incorrect, the Customer may
appeal to the City using the form in Appendix A of this manual.
2.2 Less than 400 Square Feet of Impervious Area Land
Adjustment
A Fee will not be charged to Customers with less than 400 square feet of Impervious
Area. A Customer receiving a Fee for property with less than 400 square feet of
Impervious Area will be eligible for an Adjustment through the appeals process.
2.3 Partial Discharge Adjustment
Properties which partially or completely drain outside of the City limits will be
eligible for an Adjustment through the appeals process. In order to qualify for this
adjustment, runoff draining from the property outside the City limits must remain
completely outside the City limits and not return at any point downstream. If the
Impervious Area on the entire property drains outside the City limits, a Fee will not
be assessed. If a portion of the Impervious Area on the property drains outside the
City limits, a Fee will be assessed in proportion to the amount of Impervious Area
draining within the City limits. This adjustment is subject to future annexations and
future City limit boundary changes.
Section 2
Appeals for Adjustment
8
2.4 Process of Appealing for an Adjustment
Adjustments are obtained by participating in the appeals process described above and
in Section 6- 4008 of the Stormwater Utility Ordinance. Any Customer determining
their Fee is not in proportion to the amount of impervious surface on their property
may apply for Adjustment by submitting the appeals form in Appendix A to the
Stormwater Program Manager. As part of the submission, the Customer must
provide the City with evidence or justification for the correction of the fee in question.
In some cases, the Customer may also be required to submit, at his or her expense, a
survey prepared by a registered land surveyor or other information as discussed in
Section 6- 4008 (1) of the Stormwater Utility Ordinance. The Stormwater Program
Manager will issue a written determination on a particular matter. Once the
Stormwater Program Manager has made a determination on the matter, the Customer
is allowed 30 days (after service of the written decision) to file an appeal with the
Public Works Director and City Manager. The ruling of the City Manager may be
appealed to the City Council.
2.4.1 Eligibility of Adjustment
Customers awarded an Adjustment by the City may be eligible to receive the
Adjustment retroactive to Fee inception but in no case longer than 3 past years.
Adjustments will not be awarded for any period preceding Fee inception or preceding
the date at which the City judges the stormwater runoff generated from the property
is inconsistent with the Fee paid. The three-year retroactive payment policy also
applies to cases where the City determines that the Fee for a property is less than it
should be based on the amount of impervious surface on the property.
Section 3
Stormwater Fee Credit Opportunities
Section 3
Stormwater Fee Credit Opportunities
As discussed in Section 1.5, the City Council approved a Stormwater Utility
Ordinance and this ordinance establishes opportunities for Customers to receive
Credits on their Fee for installing Stormwater Facilities to specified standards.
Currently, single-family residential lots are not eligible for the Stormwater Fee Credits
since Raleigh City Code prohibits detention on single-family lots. The only exception
to this rule is where a facility was installed for use by multiple lots on commonly-
owned or common area of a homeowner’s association like a townhouse, cluster unit
or condominium development. In such instances, each dwelling unit may be eligible
for its equal pro-rata share of the credit unless other arrangements for billing the
Stormwater Management Service Charge to the homeowner’s association was made
pursuant to 6-4006(e) of the Stormwater Utility Ordinance.
The reader should not view this document as a sole source but as a guide to assist in
interpreting policies set forth in the Stormwater Utility Ordinance, the Stormwater
Ordinance, and the Design Manual.
3.1 Stormwater Facility Credit
For installing Stormwater Facilities exceeding City requirements specified in the
Stormwater Ordinance, Customers may be eligible for a Credit of up to 50%. To
qualify, Customers must demonstrate that their Existing Stormwater or New
Stormwater Facility manages stormwater generated from their immediate property
and/or upstream tributary areas. In addition, the Facility must exceed design criteria
outlined in the Stormwater Design Manual and Stormwater Ordinance, effectively
reducing City stormwater management costs by lowering capital costs. The
Stormwater Facility must also meet all North Carolina State Dam Safety standards.
For each of the design storms discussed in the following sections, the stormwater
facility must be designed to control the storm event from the Post-Developed
conditions back to the Pre-Developed conditions, as defined in Section 1 of this
manual. The structure of the Stormwater Facility Credit is explained below.
Table 1 shows the Credit opportunities for Customers with a Stormwater Facility that
controls on-site stormwater runoff. A Customer that installs a Stormwater Facility to
control on-site stormwater runoff may be eligible for a maximum credit of 20 percent.
Credit may only be granted for facilities that exceed the existing City standard for
controlling the runoff from the 2-year and 10-year, 24-hour design storm events.
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Section 3
Stormwater Fee Credit Opportunities
Table 1 - Stormwater Facility Credit Opportunities (Onsite Controls)
Storm Event for which Onsite Stormwater is
Controlled by Stormwater Facilities Credit Opportunity
2- year and 10-year Storm Event (Required) 0%
2- and 10- and 25-year or Larger Storm Events 20%
Table 2 shows the Credit opportunities for Customers with a Stormwater Facility that
controls runoff from an upstream tributary area, which means a customer is
controlling runoff from offsite. A Customer controlling runoff from an upstream area
is eligible for a maximum credit of 30 percent. Since the credits are additive, a
Customer controlling both their onsite drainage area and an upstream tributary area
greater than 100 acres for the 25-year, 24-hour or larger design storm event would be
eligible for a maximum stormwater Fee credit of 50 percent. In the case of a facility
controlling upstream drainage area, the Post-Developed Condition must be calculated
based on complete build-out of the upstream drainage area as determined from
current zoning and the City’s Comprehensive Plan.
Table 2 - Stormwater Facility Credit Structure (Upstream Controls)
Upstream Tributary Area for which
Stormwater is Controlled by
Stormwater Facilities
Controlling
2-yr Storm
Controlling
2-yr & 10-yr
Storm
Controlling
2-yr, 10-yr, &
25-yr Storm
Less than 10 acres 0% 0% 0%
Between 10 and 100 acres 5% 10% 15%
Greater than 100 acres 10% 20% 30%
Note: Stormwater Facilities controlling stormwater runoff greater than the design storm event
receive the same credit as the specified year storm event in the table. For example, a
Stormwater Facility controlling greater than the 25-year design storm receives the same credit
as the 25-year storm event.
3.2 NPDES Credit
Customers holding National Pollution Discharge Elimination System (NPDES) MS4
permits will be eligible for a Credit of an amount to be determined by the City on a
case-by-case basis and not to exceed 35%. The Credit will be determined based on a
comparison between the City’s NPDES program and the Customer’s NPDES
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Section 3
Stormwater Fee Credit Opportunities
program. Credit will be given for elements of the programs that are similar to those
offered by the City.
3.3 Eligibility for Credits
Customers must receive a bill for Stormwater Services provided by the City and must
meet requirements detailed in Section 3, et seq., and must apply the credit to
Developed Lands containing the credited Stormwater Facility to be eligible for a
Credit. For developments with credited stormwater facilities in common areas such
as a townhouse development, cluster unit developments, or condominiums, each
dwelling unit or condominium unit shall be eligible for its equal pro-rata share of the
credit unless other arrangements for billing the Fee are made pursuant to Section 6-
4006(e) of the Stormwater Utility Ordinance.
3.3.1 Customers
Section 6-4006 of the Stormwater Utility Ordinance details the manner in which
Customers will be billed. As defined in Section 1.1, a Customer is the person or entity
receiving a bill for Stormwater Services. Customers may include the owner, occupant,
or tenant of property, or a person or entity who has requested in writing to receive a
bill for Stormwater Services for a property. Any Customer receiving a bill for
Stormwater Services is eligible to receive a Credit if they meet requirements for a
particular Credit specified in Section 3, et seq.
3.3.2 Maintenance Agreement
An Owner of Stormwater Facilities must agree in writing to maintain the credited
Stormwater Facility to City Standards and all other applicable standards (ex. North
Carolina State Dam Safety standards) in order to be eligible for Credit. Maintenance
activities to be performed are detailed in Section 3.4 et seq. Failure to maintain a
Facility in strict compliance to City Standards will result in the loss of the Credit and
possible surcharge to recapture improper credits. The owner of a credited
Stormwater Facility is responsible for notifying the City if the facility is compromised
or damaged in any way or is no longer complying with State law or City Standards.
The owner of a credited Stormwater Facility must also notify the City if any repair
work is performed that may alter the operation of the Facility.
3.3.3 Right of Entry
In order to be eligible for a Stormwater Facility Credit, an owner of a credited
Stormwater Facility must first agree in writing that appropriate City staff have
permission to inspect Stormwater Facilities on the owner’s property at any time.
Inspection procedures are detailed in Section 3.5.2. Failure to permit City inspection
shall terminate the Credit.
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Section 3
Stormwater Fee Credit Opportunities
3.3.4 Existing Stormwater Facilities
Existing Stormwater Facilities may be eligible for Credit if they meet requirements
detailed in Sections 3 et seq. for a particular Credit. Similar to new facilities, Existing
Stormwater Facilities must exceed City stormwater runoff control requirements and
must be maintained to be eligible for a Credit.
3.3.5 Upgrades
Recognizing that the City’s stormwater requirements have evolved over the past three
decades, the City will not require current recipients of a Credit to upgrade their
facilities immediately to conform to future changes in City stormwater requirements.
However, once a City standard is changed, the City will only guarantee existing
credits for a period of five years provided the Customer Maintains the Facility to City
Standards and the Facility otherwise complies with State law. In the event that a
Facility has not been upgraded to the new standard at the end of the five-year period,
the Credit will be terminated.
3.4 Stormwater Facility Maintenance
In order to receive a Credit, a Stormwater Facility must be privately maintained in
strict compliance to City Standards and North Carolina Dam safety standards where
applicable to ensure that the Facility functions as credited at all times. Furthermore,
Customers must document all operation and maintenance activities and provide the
City with a report annually. Required maintenance activities are described in the
following sections. More information concerning maintenance may be found in
Sections 1.3.3 and 1.7 in the City’s Stormwater Design Manual or in the maintenance
manuals.
3.4.1 Required Stormwater Pond Maintenance
The following stormwater facility maintenance activities are required for a Customer
to be eligible for a Stormwater Facility Credit. These activities are required to ensure
that the Facility performs as credited, complies with City Standards and State law,
meets safety standards, and is not a public nuisance. Maintenance activities are
required on all drainage structures related to the facility, including the dam, inlets,
headwalls, velocity dissipaters, spillways, pipes, feeder channels, discharge channels,
etc. The owner of a credited Stormwater Facility must comply with all applicable
maintenance practices below that are relevant to the credited facility.
Debris and Litter Removal – This activity must be performed after storm events
totaling approximately two inches over a 24-hour period or as needed in order to
prevent the structure from clogging and failing and to prevent a public nuisance.
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Section 3
Stormwater Fee Credit Opportunities
Erosion and Structural Repair – Side slopes, emergency spillways, and
embankments all may periodically suffer from slumping and erosion. Regrading,
revegetating, compacting and/or installing or replenishing rip-rap may be required
to correct erosion problems that develop.
Mowing – Side slopes, embankments, emergency spillways, and other grassed
areas of stormwater facilities should be periodically mowed to prohibit woody
growth and to prevent grass from growing over eight inches in height (which is a
public nuisance as set forth in the Raleigh City Code). More frequent mowing may
be required in residential areas by adjacent homeowners or to meet State Dam
Safety standards. Native grasses, which are water-tolerant, pest-tolerant, and slow
growing, are recommended.
No Blockages - Remove sediment or any blockage from pipes, channels, spillways,
inlets and outlets as needed to keep the facility in proper working condition.
Nuisance Control – Standing water or soggy conditions within a “dry” stormwater
facility can create nuisance conditions for nearby residents. A public nuisance is
defined in the Raleigh City Code. Common nuisance conditions may include
odors, mosquitoes, litter and weeds. Regular maintenance to remove debris and
ensure control structure functionality is required to control these potential
problems. In addition, well-maintained and established wetland plants in wet
detention ponds or bird nesting boxes around the pond can provide a habitat for
birds and predacious insects and fish that can actively serve as a natural check on
nuisance insects such as mosquitoes. Cyclical alteration of the water level in the
pond or installation of aeration/agitation features will also disrupt most unwanted
larval growth.
Outlet Control – Maintain outlet control devices to ensure proper functioning in
the control of stormwater velocities at the outlet of the stormwater facility. Re-
vegetating and/or replenishing or installing rip-rap may be required to correct
erosion problems at the outlet of stormwater facility pipes.
Removal of Log Jams and Debris - All stream and ditches within the stormwater
system should be inspected periodically for blockages. If identified, the blockages
and debris should be removed as quickly as practicable.
Sediment Removal – This activity is to be performed as needed or as required by
the City to ensure proper working order of the facility and its related stormwater
facility features (channels, pipes, etc.). Sediment removal is also required to
maintain the required storage volume per the North Carolina design guidelines.
Structural Repairs and Replacement – Eventually, stormwater control structures
will deteriorate and must be replaced. Major structural damage to outlet structures
(i.e. cracks, leaks, or failure) must be repaired as soon as possible.
13
Section 3
Stormwater Fee Credit Opportunities
3.5 Enforcement
Inspections and annual documentation are the primary methods employed to monitor
Credits. Failure to Maintain and operate the Stormwater Facility in strict compliance
with City Standards will result in the loss of the credit and possible surcharge to
recapture improper credits. All credited Stormwater Facilities are subject to nuisance
ordinances of the City as well.
3.5.1 Annual Documentation
Annual documentation (as measured from the date the Credit application was
approved by the City) must be submitted to the City to continue receiving a Credit.
The required documentation consists of the following:
Annual certification report by the Property Owner or Chief Executive Officer that
the Stormwater Facility is in place and in proper working order.
Every three years, an inspection and certification report from an independent,
professional engineer that conforms to Section 10-9028 of the Stormwater
Ordinance.
Recently dated photographs showing the condition (including any known damage
or disrepair) of a Stormwater Facility. For stormwater ponds, these photos should
include views of the outlet structure, all side slopes, vegetated littoral zones, a view
from the downstream channel looking upstream at the dam and emergency
spillway, a view from the dam showing the condition of the downstream channel,
and a view of areas designed to catch sediment (if possible).
Records demonstrating that required maintenance activities have been completed
3.5.2 Facility Inspections
Each Customer that has applied for and received a Credit for a Stormwater Facility
has the private responsibility to inspect and repair their Facility to ensure that it is
functioning as credited. In addition, the City reserves the right to inspect Stormwater
Facilities receiving a Credit at any time. If the field inspection proves that any of the
annual documentation submitted for continuation of the Credit is not accurate, or the
Facility is not Maintained, or if the Facility is not operating as credited, the Credit will
be forfeited, and the Customer must repay the City in the form of a surcharge the
amount of Credit received during the period for which the City determines the
Stormwater Facility was out of compliance.
Inspections will be performed at the discretion of the City to assure that a Facility is
operating as credited (no blockage due to excessive silt, logs, or debris). Annual
inspection is possible with additional inspections of problematic areas following large
storm events (two inches of rainfall or more over a 24-hour period). Further
14
Section 3
Stormwater Fee Credit Opportunities
information concerning City inspections may be found in Section 10-9028 of the
Stormwater Ordinance.
3.6 Applying for a Stormwater Facility Credit
The following sections present the typical Credit application process for New and
Existing Stormwater Facilities. The steps described in Section 3.6.1 are recommended
to expedite the application process. Steps described in Sections 3.6.2 through 3.6.4 are
required to be eligible for any Credit.
3.6.1 Preliminary Interaction with the City
Since the calculations and hydrologic analyses involved in the design of a Stormwater
Facility are complex, a professional engineer registered in the State of North Carolina
must seal the design of a new Stormwater Facility, or must seal the review of any
Existing Facilities or proposed Facility upgrades. Therefore, it is highly
recommended that the applicant interact with City stormwater engineers first before
an applicant hires an engineer to perform these services.
City stormwater engineers will evaluate how a property will fit into the drainage
scheme of the City, allowing them to provide valuable insight to one designing a
Facility or to one owning an Existing Facility to determine what Credit is available.
For example, the City stormwater engineer might be able to tell a Customer what
upstream drainage area a Stormwater Facility might control. This knowledge and the
guidelines in Sections 3.1 through 3.3 allow one to determine the level of Credit for
which they may be eligible. The City determines the final amount of Credit based on
the policies of this manual.
3.6.2 Perform Hydrologic Analysis and Design Facility
If a Customer decides to install a Stormwater Facility, a professional engineer licensed
in the State of North Carolina must be hired to perform a hydrologic/hydraulic
analysis and design a Stormwater Facility that will achieve the level of Credit desired
by the Customer. Customers seeking Credit for an Existing Facility should refer to
Section 3.7.
3.6.3 Complete Application
Once an engineering analysis has been completed, the Customer should follow the
instructions to fill out the application in Appendix B.1. This application along with an
engineering report will be submitted to the City for final Credit determination. A
checklist for submitting a complete application to the City is included in the
application form. If approved by the City, any Credit awarded will appear on the
15
Section 3
Stormwater Fee Credit Opportunities
billing cycle following 90 days or less from when the Stormwater Facility was fully
constructed and approved by the City.
3.6.4 Construction of a New Stormwater Facility
If an application is successful, the Customer must construct the new Stormwater
Facility before the Credit takes effect. The Customer must also provide an “as-built”
certification to the City which must be sealed by an engineer for all new structures.
3.6.5 Inspection of a New or Existing Stormwater Facility
The completed new Facility or an existing Facility may be subject to inspection by the
City to ensure that it will perform as credited.
3.7 Applying for Credits for Existing Facilities
Credit application procedures for Existing Stormwater Facilities are similar to those
detailed in Section 3.6 for New Stormwater Facilities. The recommendation described
in Section 3.6.1 to consult with a City stormwater engineer may still be useful for the
owner of an Existing Stormwater Facility that is determining what Credit may be
available to them. An engineering analysis as detailed in Section 3.6.2 must be
performed for an Existing Stormwater Facility to prove that it exceeds current City
runoff control standards and qualifies for Credit. The application in Appendix B.1
must be submitted along with an engineering report as discussed in Section 3.6.3 and
the Facility may be subject to inspection as detailed in Section 3.5.2 and Section 3.6.5.
3.8 Credit Renewal
Credits granted to a Customer for and Existing or New Stormwater Facility is in effect
for one-year. In order to continue receiving Credit in future years, a Customer must
renew their application annually. Documentation as discussed in Section 3.5.1 must
be submitted along with the renewal application in Appendix B.3. In addition, an
inspection of the Stormwater Facility by a licensed engineer must be performed in
accordance with Section 10-9028 of the Stormwater Ordinance prior to renewing a
Credit. If the annual documentation or inspection proves a Stormwater Facility is not
in compliance with City requirements, Credit will be subject to termination and
Credit received during any period of non-compliance must be repaid to the City.
Appendix B.4 contains detailed instructions for completing the renewal application.
A checklist is also included with the form to assist the Customer.
3.8.1 Implementation of the Credit
Depending on when an application for a Credit is submitted, whether a Stormwater
Facility is new or existing and/or when a new Stormwater Facility is fully constructed
16
Section 3
Stormwater Fee Credit Opportunities
and approved by the City, implementation may be handled differently as described in
the following sections. Generally, it is estimated that applications will take three
months to process. Successful applications will receive Credits as detailed below.
3.8.2 Credit Applications for New Stormwater Facilities
Customers submitting a Credit Application for a New Stormwater Facility will be
eligible to receive the Credit upon approval of the application by the City. However,
no Credit will be awarded until the Stormwater Facility is fully constructed and
approved by the City.
3.8.3 Credit Applications for Existing Stormwater Facilities
Customers submitting Credit Applications for an Existing Stormwater Facility may be
eligible to receive Credit retroactive to Fee inception or up to three years prior to
approval of the application, whichever is shorter. Credit will not be awarded for
applications for an Existing Stormwater Facility for any time period preceding Fee
inception or for any time period proceeding the date at which the Stormwater Facility
was fully constructed and approved by the City. However, Customers must be able
to prove the Existing Stormwater Facility complies with North Carolina dam safety
standards and other applicable State laws and has satisfied relevant Credit
requirements detailed in Sections 3 et seq. for the time period(s) in question and has
been maintained throughout that time period in order to receive the retroactive
Credit.
17
Appendix A
Forms, Instructions and Checklists for Adjustments
Appendix A
Forms, Instructions and Checklists For
Adjustments
18
Appendix A
Forms, Instructions and Checklists for Adjustments
19
A.1 Appeal for Adjustment Form
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Stormwater Management
P.O. Box 590 Raleigh, NC 27602-0590
Telephone: (919) 890-3931 Fax: (919) 890-3179
Stormwater Fee Appeal for Adjustment Application
Section A.
APPLICANT INFORMATION
Property Owner:
Primary Location/Street Address:
Telephone: Fax:
Email Address:
Section B.
APPLICANT’S ENGINEER or SURVEYOR (if applicable)
Name:
Address:
Telephone: Fax:
Email Address:
Section C.
PROPERTY INFORMATION (attach a copy of your latest utility bill)
Name of Property (e.g. Complex or Development):
City of Raleigh Water Billing Number:
Parcel Identification Number (PIN):
Property Address:
Section D.
DETAILS OF THE APPEAL FOR ADJUSTMENT
Type of Property (check one): Single-Family Townhouse Multi-Family Other Residential Non-residential
PLEASE CHECK THE BOX NEXT TO THE TYPE OF ADJUSTMENT:
Impervious Area Measurement Adjustment
Less than 400 Square Feet of Impervious Area Land Adjustment
Partial Discharge Adjustment
Currently Billed Impervious Area: Square Feet
Proposed Impervious Area: Square Feet
Please include a detailed description of the reason for the adjustment as an attachment to this application. Also, please provide the
City with any property maps or measurements that may be needed to determine your adjustment. A detailed topographic survey may
be required in some cases at the expense of the Owner.
21
Section E.
APPLICANT CHECKLIST
PLEASE INCLUDE ALL OF THE FOLLOWING (CHECK OFF): If any information is missing from the request package, you will be
asked to complete the request and re-submit. Please note that the City reserves the right to request additional information if necessary.
A copy of your most recent City of Raleigh Utility Bill.
Complete application form requesting an Appeal for Adjustment.
Evidence supporting the basis for the adjustments including the opinion of a certified professional engineer or
surveyor where applicable.
Current City of Raleigh topographic map outlining the property and disputed impervious areas, where applicable.
Correct parcel identification number (PIN) – See Section F for instructions on obtaining the PIN for your property.
Section F.
iMAPS INSTRUCTIONS
IMAPS is the City of Raleigh and Wake County on-line property information and mapping system. You can access
iMAPS from both the City and County GIS websites, the direct link is http://maps.raleighnc.gov.
Once you are at the iMAPS home page, click on the “Start IMAPS” button. This will bring up the map display.
You can search for property by owner, address, intersection, or parcel id number. These buttons are on the left side of
the screen. Select the search method you would like to use. Empty search criteria boxes will display. For example, if
“Address” is selected, several empty boxes are available. You can enter just the street name and click on “Search” or you
can fill in the street number and name and select “Search.”
A list of parcels matching the criteria chosen will be displayed on the right side of the screen. Click the parcel number of
the property you are interested in. A map of the property will be displayed with the property highlighted. The correct
parcel identification number (PIN) can be located here.
Section G.
CERTIFICATION STATEMENTS
PLEASE INITIAL THE FOLLOWING STATEMENTS CERTIFYING THAT YOU HAVE READ AND UNDERSTAND EACH ONE:
I hereby certify that the information in this packet is truthful and accurate.
I hereby grant the City of Raleigh access to the property referenced in this document to confirm any of the
information stated in this application to determine my adjustment.
22
Section H.
SIGNATURE(S)
Signed this _____ day of _____________________, 20____by the owners of the property.
OWNER’S SIGNATURE(S) – If multiple owners, all must sign.
PRINT OWNER NAME(S), ADDRESSES, PHONE NUMBER(S):
Section I.
OFFICE USE ONLY
Received by the City of Raleigh, North Carolina, this ______ day of ____________________________, 20______.
Application reviewed on this ______ day of ____________________________, 20______.
Application reviewed by: _______________________________________________________________________
Determination of Adjustment: Currently Billed Impervious Area: Square Feet
Revised Impervious Area: Square Feet
Retroactive Adjustment Required (YES or NO) If yes, then record Retroactive Date:
23
Appendix A
Forms, Instructions and Checklists for Adjustments
A.2 Appeal for Adjustment Form Instructions
Applicants must fill out the Appeal for Adjustment Form contained in Appendix A.1
and submit the items listed in the Checklist. Please note that the City reserves the right
to request additional information if necessary to determine the adjustment.
Applicants should fill out the entire form as completely as possible. The following
directions apply to each section of the form.
Section A
Please submit the information requested by the Application including Property Owner,
Physical Address, Contact Information and a copy of the most recent Utility Bill from
the City of Raleigh.
Section B
Please submit the information requested concerning the Applicant’s Engineer or
Surveyor (if applicable) including the Name, Physical Address, and Contact
Information.
Section C
Please submit the information requested concerning the Applicant’s Property. The City
of Raleigh Water Billing Account Number may be found on the latest statement of the
Applicant’s bi-monthly utility bill from the City. The Parcel Identification Number
(PIN) may be found using the City of Raleigh & Wake County iMAPS system.
Instructions for the iMAPS system are contained in Section F of the application. If the
property address is different from the Owner address in Section A, please include in
Section C.
Section D
Please check the box next to the type of adjustment for which you are applying and list
your requested change of impervious area in the appropriate spaces. In addition, please
attach all documentation needed to justify your claim for an adjustment. Additional
information may include:
a map of the property
property measurements
City of Raleigh topographic data
a complete site survey by a registered surveyor or engineer
Section E
A checklist for completion of the application is included in Section E. Please check the
boxes next to each item to signify that you have completed the entire form. If the form is
`
24
Appendix A
Forms, Instructions and Checklists for Adjustments
not complete, the City may request that you re-submit the form before making a
determination on the adjustment.
Section F
Section F includes instructions for the City of Raleigh & Wake County iMAPS system.
The system can be used to obtain the property’s parcel identification number (PIN).
This number is VERY important for the City to track the adjustment of your fee. Please
make sure to record your PIN accurately.
Section G
Please place your initials in the appropriate spaces to signify that you will comply with
the statements in this section. This section must be complete in order for your
application to be processed.
Section H
Please sign and date that you have completed the application for an adjustment. If
multiple owners exist for the property, all owners must sign this form in order to grant
the adjustment.
Section I
Section I is for office use only by City of Raleigh staff.
`
25
Appendix B
Forms, Instructions and Checklists for Credits
Appendix B
Forms, Instructions and Checklists
For Credits
26
Appendix B
Forms, Instructions and Checklists for Credits
B.1 Initial Credit Application
27
Appendix B
Forms, Instructions and Checklists for Credits
Stormwater Fee Initial Credit Application
Section A.
APPLICANT INFORMATION
Customer:
Primary Location/Street Address:
Telephone: Fax:
Email Address:
Section B.
APPLICANT’S ENGINEER
Name:
Address:
Telephone: Fax:
Email Address:
Section C.
PROPERTY INFORMATION TO WHICH CREDIT WILL BE APPLIED (attach a copy of your latest utility bill)
Name of Property (e.g. Complex or Development):
City of Raleigh Water Billing Number:
Parcel Identification Number (PIN):
Property Address:
Section D.
STORMWATER FACILITY CREDIT INFORMATION AND ELIGIBILITY
Drainage Area Controlled (acres) Design Storms Controlled for Drainage Area Indicated to the Left (YES or NO)
2-, 10-, and 25-Year Storm Onsite Drainage Area 2-Year Storm
2- and 10-Year Storm Upstream Tributary Area 2-, 10-, and 25-Year Storm
Section E.
STORMWATER FACILITY CREDIT INFORMATION AND ELIGIBILITY
Do you have a NPDES MS4 Stormwater Discharge Permit? (YES or NO)
If YES, please include a copy of your NPDES MS4 permit and application with this Credit Application.
If you answered YES to the previous question, please list briefly the activities performed by your program. Also, please
include with your application any information the City would need to evaluate your program, including a copy of the
NPDES permit and the latest annual report.
28
29
Section F.
APPLICANT CHECKLIST
PLEASE INCLUDE ALL OF THE FOLLOWING (CHECK OFF): If any information is missing from the request package, you will be asked
to complete the request and re-submit. Please note that the City reserves the right to request additional information if necessary.
A copy of your most recent City of Raleigh Utility Bill.
Site Plan as-built construction drawings (signed and sealed by a licensed surveyor or engineer) at an appropriate
scale, showing the site, topographic details, overland flow paths, all stormwater facilities, and surrounding area.
Detailed hydrologic and hydraulic calculations using the most current available information and methodology
approved by the City that accurately describes the runoff through the site. For facilities located in the City drainage
basin study areas, the hydrologic and hydraulic models (i.e. HEC-1 and HEC-RAS) used in the City’s drainage
basin studies should be used.
Current City of Raleigh topographic map outlining the on-site drainage area, the drainage area upstream and the
location of the credited Stormwater Facility.
A detailed report that clearly describes how the stormwater facility functions for storm events the facility is
designed to control for Credit.
A proposed maintenance schedule submitted by the owner of the Stormwater Facility that describes in detail the
maintenance activities for the Stormwater Facility.
Correct parcel identification number (PIN) from the City of Raleigh & Wake County internet mapping system,
iMAPS. See Section G for iMAPS instructions.
Section G.
iMAPS INSTRUCTIONS
iMAPS is the City of Raleigh and Wake County on-line property information and mapping system. You can access
iMAPS from both the City and County GIS websites, the direct link is http://maps.raleighnc.gov.
Once you are at the iMAPS home page, click on the “Start IMAPS” button. This will bring up the map display.
You can search for property by owner, address, intersection, or parcel id number. These buttons are on the left side of the
screen. Select the search method you would like to use. Empty search criteria boxes will display. For example, if
“Address” is selected, several empty boxes are available. You can enter just the street name and click on “Search” or you
can fill in the street number and name and select “Search.”
A list of parcels matching the criteria chosen will be displayed on the right side of the screen. Click the parcel number of the
property you are interested in. A map of the property will be displayed with the property highlighted. The correct parcel
identification number (PIN) can be located here.
Section H.
CERTIFICATION STATEMENTS
PLEASE INITIAL THE FOLLOWING STATEMENTS CERTIFYING THAT YOU HAVE READ AND UNDERSTAND EACH ONE:
I hereby certify that the information in this packet is truthful and accurate.
I hereby certify that I will maintain the Stormwater Facility referenced in this application and I will adhere to the
approved maintenance schedule attached to this application.
I hereby certify that the credited Stormwater Facility will continuously meet all City standards.
I hereby grant the City of Raleigh access to the property referenced in this document to inspect the facility or
facilities proposed for a stormwater fee credit.
I hereby certify that I will notify the City of Raleigh should any destruction or damage occur to the facility
referenced in this credit application that prevents it from performing as credited.
30
Section I.
SIGNATURE(S)
NOTE: For development with common area Stormwater Facilities like condominiums, townhomes, and cluster unit developments, where
fees are pro-rated to the lot owners, the Association may sign and complete the application on behalf of its members.
Signed this _____ day of _____________________, 20____by the owners of the property.
OWNER’S SIGNATURE(S) – If multiple owners, all must sign.
CUSTOMER’S SIGNATURE(S) – If not owner. If multiple customers, all must sign.
PRINT OWNER NAME(S), ADDRESSES, PHONE NUMBER(S):
PRINT CUSTOMER NAME(S), ADDRESSES, PHONE NUMBER(S) – If not owner:
Section J.
OFFICE USE ONLY
Received by the City of Raleigh, North Carolina, this ______ day of ____________________________, 20______.
Application reviewed on this ______ day of ____________________________, 20______.
Application reviewed by: _______________________________________________________________________
Credit amount awarded to customer: Onsite Drainage Area Credit (%):
Upstream Tributary Area Credit (%):
NPDES MS4 Credit (%):
TOTAL STORMWATER FEE CREDIT:
Appendix B
Forms, Instructions and Checklists for Credits
31
B.2 Initial Credit Application Instructions
Applicants applying for a Stormwater Facility Credit for the first time must fill out the
Credit Application contained in Appendix B.1 and submit the items listed in the Credit
Application Checklist. Please note also that the City reserves the right to request
additional information if necessary to determine the Credit. Applicants or a professional
Engineer hired by the Applicant should fill out the entire form as completely as possible.
The following directions apply to each section of the form.
Section A
Please submit the information requested by the Application including Customer Name,
Physical Address, Contact Information and a copy of the most recent Utility Bill from
the City of Raleigh.
Section B
Please submit the information requested concerning the Applicant’s Engineer including
the Name, Physical Address, and Contact Information.
Section C
Please submit the information requested concerning the Applicant’s Property for which
Credit will be applied. The City of Raleigh Water Billing Account Number may be
found on the latest statement of the Applicant’s bi-monthly utility bill from the City.
The Parcel Identification Number (PIN) may be found using the City of Raleigh & Wake
County iMAPS system. Instructions for the iMAPS system are contained in Section G of
the application. If the property address is different from the Customer’s address in
Section A, please include in Section C.
Section D
Please indicate the number of acres of onsite and upstream tributary drainage area (if
applicable) controlled by the Applicant’s Stormwater Facility by entering the correct
amount in the boxes provided. The Applicant shall receive this information from the
professional engineer that was hired to design the new facility or who has performed the
study of an existing facility. The applicant shall submit to the City a detailed
topographic map outlining the drainage areas. In addition, the engineer should signify
the appropriate design storm events controlled by the Stormwater Facility.
Section E
Please signify with a YES or NO in the appropriate box whether a NPDES MS4
stormwater discharge permit has been obtained for this property. If so, please describe
the elements of the program in the given box and include a copy of your NPDES Permit
and Application with your request for Credit to the City. In addition, please supply the
City with any additional information needed to evaluate your program. This
information may include documentation of the activities that you perform to stay in
compliance with the permit, such as maintenance logs, monitoring information, etc.
Appendix B
Forms, Instructions and Checklists for Credits
32
Section F
A checklist for completion of the application is included in Section F. Please check the
boxes next to each item to signify that you have completed the entire form. If the form is
not complete, the City may request that you re-submit the form before making a
determination on the adjustment.
Section G
Section G includes instructions for the City of Raleigh & Wake County iMAPS system.
The system can be used to obtain the property’s parcel identification number (PIN).
This number is VERY important for the City to track the adjustment of your fee. Please
make sure to record your PIN accurately.
Section H
Please place your initials in the appropriate spaces to signify that you will comply with
the statements in this section. This section must be complete in order for your
application to be processed.
Section I
Please sign and date that you have completed the application for an adjustment. If
multiple customers exist for the property, all customers must sign this form in order to
grant the adjustment. For development with common area Stormwater Facilities such as
condominiums, townhomes or cluster unit developments, where fees are pro-rated to
the lot owners, the Association may sign and complete the application on behalf of its
members.
Section J
Section J is for office use only by City of Raleigh staff.
Appendix B
Forms, Instructions and Checklists for Credits
33
B.3 Credit Renewal Application
34
Stormwater Fee Credit Renewal Application
Section A.
APPLICANT INFORMATION
Customer:
Primary Location/Street Address:
Telephone: Fax:
Email Address:
Section B.
APPLICANT’S ENGINEER
Name:
Address:
Telephone: Fax:
Email Address:
Section C.
PROPERTY INFORMATION TO WHICH CREDIT WILL BE APPLIED (attach a copy of your latest utility bill)
Name of Property (e.g. Complex or Development):
City of Raleigh Water Billing Number:
Parcel Identification Number (PIN):
Property Address:
Section D.
STORMWATER FACILITY CREDIT INFORMATION AND ELIGIBILITY
Drainage Area Controlled (acres) Design Storms Controlled for Drainage Area Indicated to the Left (YES or NO)
2-, 10-, and 25-Year Storm Onsite Drainage Area 2-Year Storm
2- and 10-Year Storm Upstream Tributary Area 2-, 10-, and 25-Year Storm
Section E.
STORMWATER FACILITY CREDIT INFORMATION AND ELIGIBILITY
Are you receiving credit for an existing NPDES MS4 Stormwater Discharge Permit? (YES or NO)
If your permit has expired since your last credit renewal, please submit your new permit.
If any of your permit requirements have changed from your previous submission for a credit, please explain these changes
below.
Section F.
APPLICANT CHECKLIST
PLEASE INCLUDE ALL OF THE FOLLOWING (CHECK OFF): If any information is missing from the request package, you will be asked
to complete the request and re-submit. Please note that the City reserves the right to request additional information if necessary.
35
A copy of your most recent City of Raleigh Utility Bill.
Records demonstrating that required maintenance activities have been completed.
Certified inspection report complying with Section 10-9028 of the Stormwater Ordinance.
Recently dated photographs showing the condition (including any known damage or disrepair) of a stormwater
facility. For stormwater ponds, these photos should include views of the outlet structure, all side slopes,
vegetated littoral zones, a view from the downstream channel looking upstream at the dam and emergency
spillway, a view from the dam showing the condition of the downstream channel, and a view of areas designed to
catch sediment (if possible).
Section G.
iMAPS INSTRUCTIONS
iMAPS is the City of Raleigh and Wake County on-line property information and mapping system. You can access
iMAPS from both the City and County GIS websites, the direct link is http://maps.raleighnc.gov.
Once you are at the iMAPS home page, click on the “Start IMAPS” button. This will bring up the map display.
You can search for property by owner, address, intersection, or parcel id number. These buttons are on the left side of the
screen. Select the search method you would like to use. Empty search criteria boxes will display. For example, if
“Address” is selected, several empty boxes are available. You can enter just the street name and click on “Search” or you
can fill in the street number and name and select “Search.”
A list of parcels matching the criteria chosen will be displayed on the right side of the screen. Click the parcel number of
the property you are interested in. A map of the property will be displayed with the property highlighted. The correct
parcel identification number (PIN) can be located here.
Section H.
CERTIFICATION STATEMENTS
PLEASE INITIAL THE FOLLOWING STATEMENTS CERTIFYING THAT YOU HAVE READ AND UNDERSTAND EACH ONE:
I hereby certify that the information in this packet is truthful and accurate.
I hereby certify that the Stormwater Facilities and the conditions of the facilities have not been altered since the
submittal of the initial application for credit.
I hereby certify that the credited Stormwater Facility or Facilities will continuously meet all City standards.
I hereby certify that I will notify the City of Raleigh should any destruction or damage occur to the facility
referenced in this credit application that prevents it from performing as credited.
I hereby certify that I have maintained the Stormwater Facility referenced in this application and have adhered to
the approved maintenance schedule contained in the initial credit application.
I hear by certify that I will continue to maintain the Stormwater Facility referenced in this application and will
adhere to the approved maintenance schedule contained in the initial credit application.
I hereby certify the credited Stormwater Facility or Facilities meet all City Standards.
I hereby grand the City of Raleigh access to the property referenced in this document to inspect the credited
Stormwater Facility or Facilities proposed for a stormwater fee credit.
Section I.
SIGNATURE(S)
NOTE: For development with common area Stormwater Facilities like condominiums, townhomes, and cluster unit developments, where
fees are pro-rated to the lot owners, the Association may sign and complete the application on behalf of its members.
Signed this _____ day of _____________________, 20____by the owners of the property.
OWNER’S SIGNATURE(S) – If multiple owners, all must sign.
CUSTOMER’S SIGNATURE(S) – If not owner. If multiple customers, all must sign.
PRINT OWNER NAME(S), ADDRESSES, PHONE NUMBER(S):
PRINT CUSTOMER NAME(S), ADDRESSES, PHONE NUMBER(S) – If not owner:
Section J.
OFFICE USE ONLY
Received by the City of Raleigh, North Carolina, this ______ day of ____________________________, 20______.
Application reviewed on this ______ day of ____________________________, 20______.
Application reviewed by: _______________________________________________________________________
Credit amount awarded to customer: Onsite Drainage Area Credit (%):
Upstream Tributary Area Credit (%):
NPDES MS4 Credit (%):
TOTAL STORMWATER FEE CREDIT:
36
Appendix B
Forms, Instructions and Checklists for Credits
37
B.4 Credit Renewal Application Instructions
Applicants applying for a Renewal of an existing credit must complete the Stormwater
Fee Credit Renewal Application in Section B.3 and submit the items listed in the Credit
Renewal Checklist on the application form. Applicants do not need a professional
engineer to complete the application form if no changes or upgrades have been made to
the facility within the past year. However, a professional engineer does have to
complete the certified inspection report which complies with Section 10-9028 of the
Stormwater Ordinance. The following sections provide instructions for completing the
Credit Renewal form. Most of this information can be copied by the applicant directly
from the Initial Credit Application Form.
Section A
Please submit the information requested by the Application including Customer Name,
Physical Address, Contact Information and a copy of the most recent Utility Bill from
the City of Raleigh.
Section B
Please submit the information requested concerning the Applicant’s Engineer including
the Name, Physical Address, and Contact Information.
Section C
Please submit the information requested concerning the Applicant’s Property. The City
of Raleigh Water Billing Account Number may be found on the latest statement of the
Applicant’s bi-monthly utility bill from the City. The Parcel Identification Number
(PIN) may be found using the City of Raleigh & Wake County iMAPS system.
Instructions for the iMAPS system are contained in Section G of the application. If the
property address is different from the Customer’s address in Section A, please include in
Section C.
Section D
Please indicate the number of acres of onsite and upstream tributary drainage area (if
applicable) controlled by the Applicant’s Stormwater Facility by entering the correct
amount in the boxes provided. The Applicant shall receive this information from the
professional engineer that was hired to design the new facility or who has performed the
study of an existing facility. The applicant shall submit to the City a detailed
topographic map outlining the drainage areas. In addition, the engineer should signify
the appropriate design storm events controlled by the Stormwater Facility.
Section E
Please signify with a YES or NO in the appropriate box whether a NPDES MS4
stormwater discharge permit has been obtained for this property. If so, please describe
the elements of the program in the given box and include a copy of your NPDES Permit
and Application with your request for Credit to the City. In addition, please supply the
Appendix B
Forms, Instructions and Checklists for Credits
City with any additional information needed to evaluate your program. This
information may include documentation of the activities that you perform to stay in
compliance with the permit, such as maintenance logs, monitoring information, etc.
Section F
A checklist for completion of the application is included in Section F. Please check the
boxes next to each item to signify that you have completed the entire form. If the form is
not complete, the City may request that you re-submit the form before making a
determination on the adjustment. The items in the Renewal Application Form are
intended to certify that the facility has been maintained properly throughout the past
year and that that facility continues to operate as designed for the Credit.
Section G
Section G includes instructions for the City of Raleigh & Wake County iMAPS system.
The system can be used to obtain the property’s parcel identification number (PIN).
This number is VERY important for the City to track the adjustment of your fee. Please
make sure to record your PIN accurately.
Section H
Please place your initials in the appropriate spaces to signify that you will comply with
the statements in this section. This section must be complete in order for your
application to be processed.
Section I
Please sign and date that you have completed the application for an adjustment. If
multiple customers exist for the property, all customers must sign this form in order to
grant the adjustment. For development with common area Stormwater Facilities such as
condominiums, townhomes or cluster unit developments, where fees are pro-rated to
the lot owners, the Association may sign and complete the application on behalf of its
members.
Section J
Section J is for office use only by City of Raleigh staff.
38
Appendix C
Example Credit Calculations
Appendix C
Example Credit Calculations
P:\Raleigh\Stormwater Utility\Credit Manual\ AppendixB.doc
39
Appendix C
Example Credit Calculations
Example Credit Calculations
The method for calculating a Credit will depend on many factors, such as upstream
drainage area, the existence of a primary drainage system component on a property, and
the extent to which a Facility provides runoff control during storm events. Examples
contained in this section are intended to familiarize Customers with concepts governing
the Credits and the manner in which they are calculated so that they might be able to
determine the approximate amount of Credit that may be available to them. This
particular example applies to Other Residential and Nonresidential Developed Land as
defined in Section 1.1.
C.1 Relevant Equations
Equation 1 MRSFEU
IAFee *⎟⎠
⎞⎜⎝
⎛=
Fee = Monthly Stormwater Management Service Charge
IA = Impervious Area
SFEU = Single Family Equivalent Unit (2,260 ft2)
MR = Monthly Billing Rate for an SFEU ($4.00)
Equation 2 ⎟⎠
⎞⎜⎝
⎛−=%1001*CFeeAF
AF = Adjusted Fee
Fee = Monthly Stormwater Management Service Charge
C = Credit (%)
C.2 Example 1
As detailed in the City Stormwater Ordinance, all new development is required to
control onsite stormwater resulting from a 2-year and 10-year, 24-hour design storms to
pre-developed conditions. If a property owner affected by this requirement chooses to
implement a Facility that controls more than is required, they may be eligible for Credit
as discussed in Section 3.1.
For example, assume that a property containing a shopping mall is to be built and has a
total area of 6 acres, 5 of which are impervious cover. The property accepts stormwater
40
Appendix C
Example Credit Calculations
from an upstream drainage area of 12 acres. Using Equation 1, the Fee is computed as
follows:
4$*260,2
560,43*5
2
2
⎟⎟⎟⎟
⎠
⎞
⎜⎜⎜⎜
⎝
⎛
=ft
acre
ftacres
Fee
Fee = $385.50 per month
This amount is the Fee paid by an Owner that meets minimum requirements detailed in
the Stormwater Ordinance. Currently, the City requires Owners to implement a
Stormwater Facility that controls onsite stormwater runoff resulting from a 2-year and
10-year, 24-hour design storm events. A Facility designed to control onsite runoff for the
2-year, 24-hour design storm and the 10-year, 24-hour design storm is not eligible for
Credit since it does not exceed City requirements. However, if the Owner decided to
implement a pond that controls onsite stormwater runoff resulting for the 2-, 10-, and
25-year, 24-hour design storms, the Owner would be eligible to apply for a 20%
Stormwater Facility Credit as detailed in Section 3.1. Assuming the Credit is approved
by the City, Equation 2 yields the following adjusted fee:
⎟⎠
⎞⎜⎝
⎛−=%100
%201*50.385$AF
monthperAF40.308$=
In this case, installing a pond that exceeds City requirements provides a savings of $77
per month off the Owner’s original Fee. Over a period of time, this savings would offset
the difference in capital cost for installing the larger pond needed to control the
additional stormwater.
C.3 Example 2
Consider the pond from the previous example, which qualifies for a 20% Credit for
controlling onsite stormwater runoff resulting from the 2-, 10-, and 25-year, 24-hour
design storms. Now consider sizing the stormwater pond to control runoff resulting
from 12 acres of upstream drainage area in addition to existing onsite stormwater
runoff. According to Table 1 and Table 2 in Section 3.1, a property with a Stormwater
Facility that controls more than 10 acres of upstream drainage area is eligible for an
additional 5% Credit. Furthermore, the 5% Credit triples if the stormwater pond
controls the 2, 10, and 25–year, 24-hour design storms. Since these Credits are additive,
the total Credit (C) used in Equation 1.0 would be computed as follows:
C = 20% + (3*5%)
41
Appendix C
Example Credit Calculations
%35=C
Thus the owner would be eligible to apply for a 35% Credit off the Fee assigned to the
property. This Credit results in a Fee of $250.60, a savings of $135 per month from the
Fee required to satisfy minimum requirements. Again, over time this savings will off-set
the cost of installing the larger pond needed to control the increased volume of
stormwater.
42
Appendix D
Example Design Calculations
Appendix D
Example Design Calculations
43
Appendix D
Example Design Calculations
Example Design Calculations
44
Stormwater Facility design calculations can be complex and are always site-specific.
These calculations must be performed and certified by an engineer registered in the
State of North Carolina. Guidance concerning equations and concepts has been
provided in the Design Manual. This section provides an example of how these
concepts are applied when designing a stormwater pond and of the types of calculations
that might be submitted with an application for the Stormwater Facility Credit.
D.1 Design Example
A property owner has decided that the additional cost of installing a stormwater pond
that controls the 25-year design storm (in addition to the required two and ten-year
design storms) is financially beneficial due to savings received from the Stormwater
Facility Credit detailed in Section 3.1 of this manual. The property has a total area of 3.6
acres and contains a shopping mall. The following calculation is a simplified example of
how an engineer might design the Facility.
The Design Manual specifies that Equation 2.12 (reproduced below) may be used to
estimate the required storage volume of a stormwater pond. It also specifies that this
volume should be verified by routing the design storm through the proposed Facility.
Routing concepts and methods are discussed in Section 2.5.5 of the Design Manual.
S = (Qp – MPRR) * Tp (2.12)
Where:
S = Estimated Storage Volume (cf)
Qp = Peak Inflow (cfs)
MPRR = Maximum Permissible Release Rate (cfs)
Tp = Time to Peak (seconds)
D.1.1 Determining Peak Inflow
The Design Manual specifies that the Rational Method may be used to compute peak
inflow for properties less than 100 acres in area. Thus, the Rational Method was chosen
to estimate the peak flow resulting from the 10- and 25-year design storms for Post-
Developed and Pre-Developed conditions. As described in Section 2.2 of the Design
Manual, Equation 2.1 (reproduced below) is the relevant equation for the Rational
Method.
Q = CIA (2.1)
Appendix D
Example Design Calculations
Where:
Q = Peak flow from the drainage area (cfs)
C = Coefficient of runoff (dimensionless)
I = Rainfall intensity for a given time to peak (in/hr)
A = Drainage Area (acres)
In order to determine peak flow, one must obtain values for C, I, and A. The total area is
known to be 3.6 acres and the values for C and I are computed with help from the
Design Manual.
The Design Manual gives values for C in Table 2.2. In this case, the pre-development
condition of the property most closely corresponds to woodland, which is assigned a
runoff coefficient in the range of 0.025 to 0.2. For this study, 0.2 was selected. Post-
development conditions are best described as shopping center, which is assigned a
runoff coefficient in the range of 0.85 to 0.95. For this study, 0.90 was chosen.
Rainfall intensity values may be obtained by consulting Table 2.3 in the Design Manual
if one knows the storm duration and design storm frequency. When using the rational
method, it is commonly assumed that storm duration is equal to time of concentration
(Tc), which is discussed in Section 2.2.4 of the Design Manual. Time of concentration
may be computed with the Kirpich Equation discussed in Section 2.2.5 and reproduced
below.
()
128
385.03HLTc=
Where:
Tc = Time of Concentration (min)
H = Height of the most remote point on the
watershed above the outlet (ft)
L = Length of flow from the most remote point
on the watershed to the outlet (ft)
The parameters L (300 ft) and H (20 ft) can be measured using GIS technology or from
topographic maps that are to scale and include elevation data. Using these parameters,
the time of concentration was computed to be 1.8 minutes for this particular watershed
as shown below. Though the time of concentration was computed to be 1.8 minutes, 5
45
Appendix D
Example Design Calculations
minutes is the minimum time of concentration that is used in practice. Therefore, 5
minutes was chosen as the time of concentration.
()
128
20300 385.03=Tc
8.1=Tc minutes
With the time of concentration known, rainfall intensities are taken from Table 2.3 of the
Design Manual for the appropriate design storm frequency. For 10- and 25-year storms,
the values for rainfall intensity are 7.22 (in/hr) and 8.19 (in/hr) respectively.
Once C, I, and A are known, Equation 2.1 may be applied to compute peak flows for
each design storm frequency for pre- and post-development conditions. These values
are summarized in Table 1 below.
Table 1 - Peak Flow Computation
Pre-Development Post-Development
C I A Q C I A Q
Design
Storm
Frequency
-- in/hr acres cfs -- in/hr acres cfs
10 Years 0.25 7.22 3.6 6.5 0.9 7.22 3.6 23.4
25 Years 0.25 8.19 3.6 7.4 0.9 8.19 3.6 26.5
D.1.2 Determining Required Storage Volume
The pre-development flows are important because, according to the Design Manual,
stormwater facilities must reduce post-development flows to pre-development levels in
order to receive any Credit. Therefore, the MPRR term in Equation 2.12 is the pre-
development flow given in Table 1 for the given design frequencies.
The last term needed in Equation 2.12 to estimate the required storage volume is Tp, or
time to peak. As stated on Page 48 of the Design Manual, “For most applications using
the rational method, the time of concentration (Tc) is equal to the time to peak (Tp).”
Therefore, Tc = Tp = 5 minutes (300 seconds) and the required storage volumes are
computed with Equation 2.12 as summarized in Table 2 below.
46
Appendix D
Example Design Calculations
Table 2 - Required Storage Volumes
Design Storm
Frequency Qp MPRR Tp S
yrs cfs cfs seconds ft3
10 23.4 6.5 300 5,070
25 26.5 7.4 300 5,730
Once the required storage volume estimate is computed, the engineer must verify the
result by routing an inflow hydrograph through the reservoir. These calculations are
long and complex and are not included here. Section 2.5.5 of the Design Manual
discusses these methods in more detail and provides examples. For this discussion, it is
assumed that the result has been verified.
D.1.3 Designing the Pond
From this point an engineer may progress in any number of ways to complete the design
of the pond. General design guidelines are provided in the Design Manual for
stormwater ponds including requirements for side slopes, emergency spillways, and
length to width ratios. Once the pond is designed, the engineer must submit results
from any of the accepted hydrologic and hydraulic methods specified in the Design
Manual that demonstrate the pond has been designed to meet control requirements.
Figure 1 shows the type of result that might be submitted to demonstrate acceptable
Facility design.
Figure 1 - Demonstration of Peak Flow Control
47
Appendix D
Example Design Calculations
These curves, called hydrographs, are a plot of flow versus time. Hydrograph 1 is a
hydrograph representing post development runoff inflow to a Stormwater Facility.
Hydrograph 2 represents the pre-development runoff hydrograph, or what Hydrograph
1 would be if no development had occurred. Hydrograph 3 represents Hydrograph 1
after being routed through the Stormwater Facility. Notice that the peak of Hydrograph
3 is now the same as Hydrograph 2, suggesting this Facility has been properly designed
to control the design storm that produced Hydrograph 1. The shape of the hydrograph
will change with the volume of the pond and with changes to the outlet structure. An
engineer will work with these variables until desired hydraulic results are achieved.
Figure 1 is an example of the type of evidence that must be provided (for each design
storm the Facility is designed to control) in support of a Credit Application.
48
Appendix E
Utility and Stormwater Ordinances
Appendix E
Utility and Stormwater Ordinances
49
Appendix E
Utility and Stormwater Ordinances
E.1 Stormwater Ordinance
http://www.raleighnc.gov/portal/server.pt/gateway/PTARGS_0_2_93851_0_0_18/St
ormwater_Utility_Ordinance.pdf
E.2 Stormwater Ordinance Amendment
ORDINANCE (2004) 571 TC 243A
TC-2-04
AN ORDINANCE TO AMEND THE STORMWATER CONTROL
REGULATIONS BY LIMITING THE PEAK STORMWATER RUNOFF OF
THE TEN-YEAR STORM TO BE NO GREATER FOR POST-
DEVELOPMENT CONDITIONS THAN PRE-DEVELOPMENT CONDITIONS.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF RALEIGH,
NORTH CAROLINA that:
Section 1. Amend Section 10-2072(b), for the conditional use Office,
agency, or studio of a professional, business, agent, or political, labor,
or service association in the Office and Institutional -1 and -2 Districts –
additional floor area ratio (F.A.R.) allowance, subsection (2)a., by deleting
from the beginning of the first sentence the following language:
“Stormwater runoff from a two-year and ten-year frequency storm is retained
or detained that the off-site peak rates of discharge for the project do not
exceed the predevelopment calculated rate of discharge (ten (10) points); or”;
Section 2. Amend Section 10-2072(b), for the conditional use Residential
institution in a residential zoning district, the first sentence of the lead-in
paragraph for subsection (2), by deleting the words “two-year storm” and
substituting in lieu thereof “two-year and ten-year storms”.
Section 3. Amend Section 10-2072(b), Residential institution in a
residential zoning district, subsection (2)a., by deleting the words “two-year
storm” and substituting in lieu thereof “two-year and ten-year storms”.
50
Appendix E
Utility and Stormwater Ordinances
Furthermore, delete the Editor’s Note at the end of this conditional use listing
in its entirety and substitute in lieu thereof the following:
“*Editor’s Note: This regulation, including application of stormwater controls
for the two-year storm, first became applicable on September 1, 1997.
Ordinance .No. (1997)-137-TC-18. This regulation for the ten-year storm first
became applicable on 2/29/04, Ordinance No. (2004)-571 TC 243A”.
Section 4. Amend Section 10-9023(a), first sentence, by deleting the words
“two-year storm” and substituting in lieu thereof “two-year and ten-year
storms”.
Section 5. Amend Section 10-9023(b) (1) by deleting the words “two-year
storm” and substituting in lieu thereof “two-year and ten-year storms”.
Section 6. Amend Section 10-9023(b) by adding a new subsection (4) to
read as follows:
“(4) Compliance with the ten-year storm runoff limitations in subsection
(a) above results in no benefit to current and future downstream development,
as determined by City-approved engineering studies.”
Section 7. Amend Section 10-9023 by deleting the Editor’s Note located at
the end of this Section and substituting in lieu thereof the following:
“*Editor’s Note: This regulation for the two-year storm first became
applicable on May 1, 2001, Ordinance No. (2001) -991TC-206. This
regulation for the ten-year storm first became applicable on 2/29/04,
Ordinance No. (2004)-571 TC 243A”.
Section 8. All laws and clauses of laws in conflict herewith are hereby
repealed to the extent of said conflict.
Section 9. If this ordinance or application thereof to any person or
circumstance is held invalid, such invalidity shall not affect other provisions or
applications of the ordinance which can be given separate effect and to the
end the provisions of this ordinance are declared to be severable.
Section 10. This ordinance has been adopted following a duly advertised
joint public hearing of the Raleigh City Council and the City Planning
Commission following a recommendation of the Planning Commission.
Section 11. This ordinance has been provided to the North Carolina Capital
Commission as required by law.
51
Appendix E
Utility and Stormwater Ordinances
Section 12. This ordinance shall be enforced by law as provided in G.S.N.C.
160A-75 or as provided in the Raleigh City Code. All criminal sanctions shall
be the maximum allowed by law notwithstanding the fifty dollar limit in G.S.
14-4(a) or similar limitations.
Section 13. This ordinance shall become effective on February 29, 2004, but
it shall not apply to any site plan, subdivision plan, plot plan, or building permit
application submitted prior to that date.
Adopted: 2/17/04
Effective: 2/29/04
Distribution: All Dept. Heads
Bowden, Teachey, Taylor
52
Appendix E
Utility and Stormwater Ordinances
E.3 Utility Ordinance
ORDINANCE NO. (2003) - 537
AN ORDINANCE TO CREATE A STORMWATER SERVICES ADVISORY
COMMISSION AND TO ESTABLISH A STORMWATER MANAGEMENT
UTILITY.
Whereas, Chapter 160A, Article 16 of the General Statues authorizes the
City of Raleigh to establish a stormwater management enterprise program,
and
Whereas, State and Federal laws, regulations, and rules require the City of
Raleigh to limit pollutants in stormwater discharged into receiving waterways
through various controls and management practices of stormwater quality,
flow, and quantity, and
Whereas, The North Carolina Department of Environment and Natural
Resources has adopted, in NCAC title 15A Subchapter 2B, surface water
and wetland standards for the Neuse River which requires the City of Raleigh
to regulate stormwater runoff and reduce nitrogen loads from stormwater
runoff, and
Whereas, The City of Raleigh has certain obligations and responsibilities for
the planning, designing, construction, operation and maintenance of the
stormwater management system within its municipal borders, and
Whereas, The Stormwater Utility Stakeholders Group established by the City
Council recommended to the Council that annual funding for stormwater
management programs be increased from 6 million dollars to 11.8 million
dollars per year, and
Whereas, Based on various completed drainage basin studies conducted on
behalf of the City of Raleigh, it is estimated that the City of Raleigh has a
backlog of approximately 100 million dollars of stormwater capital
improvements required to meet basic flood control, stream stabilization and
water quality objectives.
NOW THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE
CITY OF RALEIGH, NORTH CAROLINA that:
Section 1. Section 6-1002(b) of the Raleigh City Code is amended to
replace the words “storm drainage system and structures” in subsection (5)
53
Appendix E
Utility and Stormwater Ordinances
with the words “stormwater management system” and to delete subsection
(6) in its entirety, and in lieu thereof insert the following:
“(6) Manage the stormwater services of the City.”
Said section is further amended to insert at the end of subsection (8) the
following language: “, and the construction, reconstruction, extending and
otherwise building or improving storm sewer and drainage systems.”
Section 6-1002(b) is amended yet further to delete subsection (11) in its
entirety and in lieu thereof insert the following:
“(11) Enforce the following: soil erosion and sedimentation control (Part
10 Chapter 5), flood prone area regulations (Part 10 Chapter 4), sidewalks,
and driveways (Part 10 Chapter 7) and stormwater control and watercourse
buffer regulations (Part 10 Chapter 9). “.
Section 2. Chapter one of Part 6 of the Raleigh City Code is to create
two articles. Article A shall appear before section 6-1001 and it shall read”
“ARTICLE A.
DEPARTMENT OF CENTRAL ENGINEERING”
Article B shall follow section 6-1002 and it shall read:
Secs. 6-1003 – 6010.
RESERVED.
ARTICLE B.
STORMWATER MANAGEMENT ADVISORY COMMISSION
Sec. 6-6011.
Establishment, Composition, Duties and Procedures.
(a) Establishment and Composition:
The Raleigh Stormwater Management Advisory Commission shall be
composed of ten (10) members who shall reside within the City limits.
The membership of the Commission shall be appointed by the
Council. Each member shall be appointed for a period of two years
except that the Council in appointing the original membership of the
54
Appendix E
Utility and Stormwater Ordinances
Commission may prescribe terms of fewer years to the end that the
terms of the various members of Stormwater Management Advisory
Commission shall be staggered.
(b) Duties:
The Stormwater Management Advisory Commission shall have the following
charge and duties:
(1) The Commission shall review and recommend to the Council
stormwater management policies, policy changes, long range plans
and their budgetary and rate impacts.
(2) The Commission shall review and comment to the Council on the annual
stormwater management capital improvements program.
(3) The Commission shall respond to the City Council and city staff requests
for advice on matters related to stormwater services and the stormwater
management utility.
(4) The Commission shall present the Council with an annual report of
key actions and issues and its annual work program.
(c) Procedure:
The Stormwater Management Advisory Commission is directed to
adopt rules of procedure necessary to the conduct of its affairs and in
keeping with the provision of this Code, all policies of the City Council, and
applicable State laws. Such rules of procedure, and any modifications to
same, shall be submitted to the City Council for review and approval. Except
as provided in this Code, the rules of procedure adopted by the Commission
shall at least provide for: selection of the officers of the Commission; the
time and place of its regular meetings, which shall at least be held bi-
annually, and the calling of special meetings; the procedures of the conduct
of public hearings and voting. The Commission shall elect from its
membership at least a chairperson and vice chairperson, who shall serve for
terms of one (1) year, who shall be eligible for reelection, and who shall have
the right to vote. The chairperson shall preside over the Stormwater
Management Advisory Commission. In the absence or disability of the
chairperson, the vice-chairperson shall perform the duties of the chairperson.
All meetings of the Stormwater Management Advisory Commission shall be
open to the public, in accordance with the North Carolina Open Meetings
Law, G.S. 143-318.10 et seq., and a public record shall be kept of the
Commission’s resolutions, proceedings, and actions. The rules of procedure
55
Appendix E
Utility and Stormwater Ordinances
and minutes of the Commission are maintained as separate documents in
the nature of a public record at the City Clerk’s Office. The Central
Engineering Department shall provide such technical, administrative, and
clerical assistance as required by the Commission.
Section 3. Part 6 of the Raleigh City Code is amended to add a new chapter
related to stormwater water services, including provisions for a stormwater
management utility, and the new chapter shall read as follows:
“ CHAPTER 4.
STORMWATER SERVICES
Sec. 6-4001 Findings.
Sec. 6-4002 Definitions.
Sec. 6-4003 Creation of stormwater management account.
Sec. 6-4004 Stormwater management service charges.
Sec. 6-4005 Credits applicable to stormwater management service
charges.
Sec. 6-4006 Billing method, responsible parties.
Sec. 6-4007 Payment provisions; utility termination.
Sec. 6-4008 Appeal.
Sec. 6-4009 Limitation of responsibility.
_______________________________________________________________
Sec. 6-4001.
Findings.
(a) Stormwater poses a threat to the public health, safety, and welfare
because if unmanaged it floods properties, erodes watercourses and
channels, and pollutes streams and rivers.
(b) By mapping, planning, constructing, operating, cleaning, regulating
and maintaining the natural and constructed stormwater management
system, the City reduces the adverse effects of stormwater and
improves the quality of groundwater, streams, rivers, and lakes in and
around the City.
(c) Providing a stable source of funding for stormwater services, as
hereafter defined, can best be accomplished through stormwater
management utility funds. Such a utility will benefit owners and
occupants of developed land in the City and other Raleigh citizens.
56
Appendix E
Utility and Stormwater Ordinances
(d) The amount of impervious surface on a property is the single most
important factor affecting the peak rate of runoff, the total volume
discharged, and pollutant loadings of stormwater that flows from
property.
State law reference: Authority to adopt a stormwater management utility,
Chapter 160A, Article 16
Sec. 6-4002.
Definitions.
All definitions as used in this Chapter, unless the context clearly indicates
otherwise, shall have the meaning given herein:
Customer or consumer means the person or entity to which a bill for
stormwater service charges is sent. This may include the owner,
occupant, or tenant of property, a homeowner's association with
responsibility for property or for common areas associated with property, or
a person or entity who has requested in writing to be billed for stormwater
management service charges for a property.
Developed land means real property that contains impervious surfaces, and
includes improved land without structures and land on which improvements
are under construction.
Dwelling unit means one or more rooms physically arranged to create a
housekeeping establishment with separate facilities for cooking, sleeping
and toilet for occupancy by one or more persons.
Impervious surface means any surface which because of its material
composition or compacted nature impedes or prevents natural infiltration of
stormwater into the soil. Impervious surfaces include, but are not limited to,
roofs, roof extensions, patios, balconies, decks, including wooden slatted
decks, athletic courts, swimming pools, excluding the water area of
swimming pools, streets, parking areas, driveways, sidewalks, and any
concrete, stone, brick, asphalt, or compacted gravel surfaces. Ungraveled
natural footpaths, water surfaces of lakes streams and swimming pools and
drain fields are not impervious surfaces.
57
Appendix E
Utility and Stormwater Ordinances
Other residential and nonresidential developed land means any
individual lot or parcel of developed land that is not single-family
developed land. It includes, but is not limited to, land upon which there are
residential structures that contain more than one dwelling unit, such as
multi-family dwellings (duplexes and greater), manufactured home park, as
defined in Part 10, §10-2002, condominiums, apartments, boarding houses,
rooming houses, fraternity houses, sorority houses, dormitories, churches;
institutional buildings, whether public or private; hospitals, rest homes, public
and private schools, colleges, and universities, commercial, office, hotels
and motels, industrial buildings, storage areas, parking lots and land
containing improvements under construction or impervious surfaces.
Property owner or owner means the owner of a real property as shown
on the tax records of Wake or Durham County.
Single-family Equivalent Unit (SFEU) is the median amount of impervious
surface on a single-family (detached home) developed land in the City as
established by City Council resolution.
Single-family developed land means an individual lot or parcel of
developed land with only one single-family (attached [townhome] or
detached) dwelling unit, one manufactured home, or one mobile home, and
the ownership interest of the land and of the dwelling unit are united and
identical. Single-family developed land shall not include structures used
primarily for nonresidential purposes or other residential and nonresidential
developed property.
Stormwater management service charge is the charge to provide
stormwater services to developed land. The charge is based upon the
Single-family Equivalent Unit (SFEU) as calculated for that property.
Stormwater management system or system means the system of natural
and constructed devices for collecting and transporting or treating
stormwater. It includes, but is not limited to, structural drainage systems
such as open swales and ditches, catch basins, pipes, inlets, storm sewers,
drains, culverts, junction boxes, and other stormwater management facilities
that affect the quality and quantity of stormwater located within dedicated
open public street rights-of-way and City of Raleigh permanent drainage
easements accepted by the City and all natural stormwater drainage
systems.
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Utility and Stormwater Ordinances
Stormwater management utility funds mean the stormwater
management
service charges and the interest generated by those charges.
Stormwater services means City stormwater management programs
designed to protect water quality by controlling the level of pollutants in,
and the quantity and flow of, stormwater and City service of structural and
natural stormwater and drainage systems of all types. Stormwater
services include any cost necessary to assure that all aspects of
stormwater quality and quantity are managed in accordance with federal
and State laws, regulations and rules, and costs related to the
construction, operation, maintenance, inspection, management and
regulation of the stormwater management system.
Sec. 6-4003.
Creation of stormwater management account.
All stormwater management service charges and interest generated by such
charges, the stormwater management utility funds, shall be placed in a
separate City account and shall be used by the City of Raleigh solely for the
operational costs, maintenance costs, and management costs, indirect costs,
capital improvements, debt principal and debt service, and establishment of
a reserve fund for stormwater services. The City may use funds that are not
stormwater management utility funds to provide stormwater services.
Sec. 6-4004.
Stormwater management service charges.
(a) All developed land in the City, whether public or private, shall be subject
to a stormwater management service charge. Exemptions shall not be allowed
based on age, tax exemption, or other status of an individual or organization.
Stormwater management service charges may be subject to a credit system as
further provided herein.
(b) Stormwater management service charges on developed land shall be based
on a schedule of rates, charges, tiers, and late fees fixed and established from
time to time by the City Council and maintained on file in the offices of the Finance
Director and Chief Engineer. Stormwater management service charges will be
determined and modified from time to time by the City Council, so that the total
revenues generated by said charges will be used to pay the principal and the
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Utility and Stormwater Ordinances
interest on the debt incurred for stormwater purposes, and such expenses as are
reasonably necessary for providing stormwater services within the City of
Raleigh.
Cross reference: Cross reference: The amount of impervious surface
area for single-family equivalent units, the base rate, the tier structure for single-
family developed land and late charges are set forth in Resolution No. (2003) -
888.
(c) Computation of stormwater management service charges.
For Other residential and nonresidential land, the monthly stormwater
management service charges on developed land is calculated by dividing the
total impervious surface area of the property divided by one single-family
equivalent unit , rounded to the nearest tenth, multiplied by the established
monthly single-family equivalent unit rate as fixed by City Council Resolution.
For developments with common property containing impervious surfaces,
such as townhouse developments, cluster unit developments, or condominiums,
each dwelling unit shall be responsible for its equal pro rata share of the total
impervious surfaces area of the common areas of the development unless other
arrangements are made pursuant to section 6-4006(e).
(d) The following exemptions from stormwater management service charges
are allowed:
(1) Undeveloped land.
(2) Improved public streets, not including internal roads within public
facilities which have been conveyed to the North Carolina Department of
Transportation or City of Raleigh and which are used by the general public for
motor vehicle transportation, and private streets constructed in accordance with
the Raleigh City Code and City of Raleigh Streets Sidewalks and Driveway
Access Handbook.
(3) Developed land with less than four-hundred (400) square feet of
impervious surface area.
(4) Railroad tracks. However, railroad stations, maintenance buildings or
other developed land shall not be exempted from stormwater management
service charges.
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Utility and Stormwater Ordinances
(5) Portions of developed land that directly drain outside the city limits
No exemption authorized under subsections (3) through (5) shall be made until a
written request to the Chief Engineer of the City documenting the application of
the exemption is approved. The Chief Engineer may approve or reject the
request in whole or in part.
Sec. 6-4005.
Credits applicable to stormwater management service charges.
(a) The City may provide a system of credits to reduce stormwater
management service charges for properties on which stormwater control
measures substantially mitigates the peak discharge or runoff pollution flowing
from such properties or substantially decreases the City's cost of maintaining the
stormwater management system. The Central Engineering Department will
develop written policies to implement the credit system. No credit will be
authorized until the City Council approves written policies to implement the
system of credits; a copy of the approved policies shall be on file with the City
Clerk. The City's policies may make credits retroactive to the date stormwater
management service charges were initiated. Any bill charges requiring
adjustments must be applied through the utility billing system. But no credit will
be granted for more than three past years. Nothing shall prevent the City
Council from modifying the adopted system of credits, and such modifications
may apply to holders of existing credits.
(b) Each credit allowed against the stormwater management service charge is
conditioned on the continuing operation and functioning of the stormwater
control measure as designed; credited stormwater control measures must
comply with all applicable laws, ordinances and regulations, and credits may
be rescinded for noncompliance with these standards.
(c) Each credit for which a customer applies shall be subject to review and
approval by the Chief Engineer or his designee. The Chief Engineer may
approve or reject any application for a credit in whole or in part.
(d) Credits shall only be applied to developed lands containing the credited
stormwater control measure. For developments with common property containing
credited stormwater control measures such as townhouse developments, cluster
unit developments, or condominiums, each dwelling unit shall be eligible for its
equal pro rata share of the credit unless other arrangements for billing the
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Utility and Stormwater Ordinances
stormwater management service charge are made pursuant to section 6-
4006(e).
Sec. 6-4006.
Billing method, responsible parties.
(a) Bills for stormwater service shall be sent at regular periodic intervals.
Stormwater management service charges may be billed on a combined utility bill
that also contains charges for sewer service or combined sewer and water
service and/or solid/waste management service. Stormwater management
service charges that are shown on a combined utility bill may be for a different
service period than that used for sewer service or combined sewer and water
service.
(b) Stormwater management service charges for a property that receives
sewer service or combined sewer and water service will be sent to the
customer receiving such service. However, where multiple water and sewer
accounts exist for a single parcel, the bill for stormwater management service
charges may for good cause shown at the discretion of the City be sent
to the property owner. Additional policies concerning billing will be developed
by the City.
(c) The property owner is ultimately responsible for payment of the
stormwater management service charge for property for which the party billed
has not paid the stormwater management service charge.
(d) Owners of property may, with the consent of the City, designate each
occupant of the property as the party to receive the bill for stormwater
management service charge by completing and properly executing a form
provided by the City. Such designation shall fairly allocate the impervious
surfaces actually used by the billed party, and it shall be binding for the period
of time specified by the City. No occupant may be designated as the party to
receive the bill for stormwater management service charge unless the
occupant is also receiving a City sewer service or combined sewer and water
service bill. Such transfer does not relieve either the owner or occupant from
liability for stormwater management service charges if they are not paid by the
party billed.
(e) The residents of townhouse, cluster unit, and condominium developments
and other similar properties containing impervious surface in common areas
may in accordance with this subsection charge the total impervious surface
of all commonly-owned or common areas to the homeowners association.
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Utility and Stormwater Ordinances
The bill for stormwater management service charge will be sent to the
homeowners' association upon official request of a majority of all lot or unit
owners of the association; provided that (1) the current adopted budget of
the association includes this additional charge to the homeowners
association, (2) the association is receiving a City sewer service bill or
combined sewer and water service bill and (3) a payment bond in the
amount of six months estimated bill in favor of the City. Stormwater
management service charges applied to all individually-owned property within
the development may likewise be billed to the homeowners association Any
request for homeowner association billing must contain all information required
by the City and shall be binding for the period of time specified by the City.
Sec. 6-4007.
Payment provisions; utility termination.
(a) Where stormwater management service charges appear on a combined
utility bill or a master summary bill, and a customer does not pay the service
charges for all the utilities on the bill, the partial payment will be applied to the
respective service charges in the following order: delinquent stormwater
management service charges, delinquent recycling and/or solid waste
management service charges, delinquent sewer service or combined sewer and
water charges, current stormwater charges, current recycling and/or solid
waste management service charges and current sewer service or combined
sewer and water charges.
(b) Stormwater management service charges are due at the collection office in
City hall within the time period stated on the bill. Bills not paid within this time
shall be charged a late fee as set forth in the City Council adopted schedule of
charges.
(c) Where a property receives sewer service or combined sewer and water
service, if stormwater management service charges for that property are not
paid, sewer service or combined sewer and water service to that property may
be terminated, whether or not the stormwater management service charges were
included on a combined utility bill. Termination will be handled in
accordance with standard operation provisions of the City. At least twenty-
one days prior to termination of service, the City will post a sign or signs
either upon the subject property or at convenient locations as it deems
appropriate. Such posting shall advise that City sewer service or combined
sewer and water service may be terminated and direct further inquiry to a
listed telephone number. All postings are for the convenience of the public
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Utility and Stormwater Ordinances
and any defective posting shall not invalidate the termination of City utility
services.
(d) No property for which stormwater management service charges are
outstanding is entitled to receive sewer service or combined sewer and water
service until the outstanding stormwater management service charge on that
property is paid. No customer with a delinquent stormwater management service
account is entitled to open a sewer service or a combined sewer and water
account at the same or different location until the delinquency has been satisfied.
(e) If property is under billed, or not billed, or a bill is sent to the wrong party, the
City may back bill up to a three-year period.
(f) Customers with complaints about the accuracy of stormwater management
service charges are entitled to a review as provided in section 6-4008. No
charge will be retroactively adjusted to resolve customer complaints for a
period of more than three-year prior to the date the City received the
complaint. Any bill charges requiring adjustment must be applied through
the utility billing system.
Sec. 6-4008.
Appeal.
Any customer who believes the provisions of this chapter have been applied in
error may appeal in the following manner:
(1) An appeal must be filed in writing with the Chief Engineer. At the
discretion of the Chief Engineer, the appeal may be required to include a
survey prepared by a registered land surveyor and such other information
that show the total property area, the impervious surface area, and any
other features or conditions which influence the hydrologic response of the
property to the stormwater events.
(2) Using the information provided, the Chief Engineer shall conduct a
technical review pursuant to good engineering practices. The Chief
Engineer may adjust the stormwater service management charge so long
as the adjustment is in conformance with the general purpose and intent
of this chapter. At the conclusion of the review, the Chief Engineer shall
issue a written determination stating whether an adjustment to the
stormwater service management charge is appropriate, and if so, the
percentage of such adjustment. Any approved adjustments must be
communicated in writing to the appropriate utility billing staff.
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(3) An appeal may be taken from any decision of the Chief Engineer
which is adverse to the customer by giving notice of appeal to the City
Manager within thirty (30) days after service of the Chief Engineer’s
written decision on the customer. Notice of appeal shall be given by the
customer by delivery of a written statement to the City Manager stating the
grounds for the appeal and providing the City Manager with a copy of the
written decision of the Chief Engineer. The Chief Engineer shall transmit
to the City Manager and the customer all documents constituting the
record upon which the Chief Engineer’s decision was made.
(4) All decisions of the Chief Engineer and City Manager shall be served on
the customer personally or by registered or certified mail. Mailing shall be
based upon the billing address of the customer.
(5) Following the decision of the City Manager, the customer may make an
appeal to the City Council. The City Council shall fix a reasonable time for
the hearing of an appeal, shall give due notice of such hearing to the
customer and the manager, and shall render its decision within a
reasonable time.
(6) When an appeal is from a decision authorizing an adjustment to the
customer’s bill, the Chief Engineer’s decision shall remain in effect until
and unless reversed or otherwise modified.
(7) No adjustment to a customer’s bill shall be made which is for more than
the three-year period immediately preceding the date that the customer’s
request is first received by the City.
Sec. 6-4009.
Limitations of responsibility.
(a) The City shall be responsible only for the portions of the drainage system
which are in City maintained street rights-of-way and permanent storm drainage
easements conveyed to and accepted by the City. Repairs and improvements to
the drainage system shall be in accordance with established standards, policies,
and schedules.
(b) The City’s acquisition of permanent storm drainage easements and/or the
construction or repair by the City of stormwater control measures and drainage
facilities does not constitute a warranty against stormwater hazards, including,
but not limited to, flooding, erosion, or standing water.”.
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Section 4. All laws and clauses of laws in conflict herewith are hereby
repealed to the extent of said conflict.
Section 5. If this ordinance or application thereof to any person or
circumstance is held invalid, such invalidity shall not affect other provisions or
applications of the ordinance which can be given separate effect and to this end
the provisions of this ordinance are declared to be severable.
Section 6. This ordinance shall become effective five days following its
adoption.
ADOPTED: November 5, 2003
EFFECTIVE: See Section 6
DISTRIBUTION:
This ordinance prepared by the Raleigh City Attorney’s Office
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Appendix F
Utility Rate Resolution
Appendix F
Utility Rate Resolution
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Appendix F
Utility Rate Resolution
RESOLUTION NO. (2008) - 540
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF RALEIGH,
NORTH CAROLINA, REVISING THE SCHEDULE OF RATE, CHARGES,
TIERS AND CREDITS FOR CITY OF RALEIGH STORM WATER UTILITY BY
REVISING RESOLUTION NO. (2003) - 888
WHEREAS, the City Council of the City of Raleigh enacted Part 6, Chapter 3 of the
City Code which places upon the City Council the obligation to establish by resolution
the Single-family Equivalent Unit (SFEU), which means the median impervious surface
area of single-family (detached home) on developed land located within the City, the
SFEU Rate (base rate), which means the stormwater management service charge applied
to other residential and nonresidential development land per SFEU, the Single-Family
Tiers, which means the variable assignment of SFEUs for customers of single-family
developed property, and late fees; and
WHEREAS, the City Manager has recommended rates as set forth herein based upon a
study being the final report of stormwater management funding study, City of Raleigh,
North Carolina, prepared by Camp Dresser & McKee, with additional input by city staff;
and
WHEREAS, the City Council has evaluated the study and recommendations and has
determined that the standards fees and charges set forth herein below are reasonably
necessary and are in accordance with the provisions of Part 6 Chapter 3 of the City Code.
WHEREAS, the City Council has determined it to be appropriate to implement the rates
set forth herein as of the effective date of this resolution,.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE
CITY OF RALEIGH, NORTH CAROLINA that:
Section 1. SFEU Established. The single-family equivalent unit (SFEU) is
hereby established to be 2,260 square feet of impervious surface area.
Section 2. SFEU Rate Established. The single-family equivalent unit rate for
stormwater management service charges applied to other residential and nonresidential
development land is hereby established to be $4.00 per month for each single-family
equivalent unit (SFEU) or portion of a single-family equivalent unit on the parcel
Section 3. SFEU Calculation Established. The single-family equivalent unit for
each customer is established for other residential and nonresidential development land by
dividing the total impervious surface area of the property by the single-family equivalent
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Appendix F
Utility Rate Resolution
unit (SFEU) rounded to the nearest tenth. But the minimum value shall not be less than
the percentage of single-family equivalent unit applied to the lowest tier established for
single-family developed land.
Section 3. Single-family (SFU) Tiers Established. The tier structure rate
established for single-family developed land is as follows:
Impervious Area
On Property
(Square Feet) Percentage of SFEUs
1,000 or less 40%
1,001 to 3,870 100%
3871 to 6620 170%
6621 to 9500 290%
9501 or more Billed at the rates established in Section
2
above for each SFEU
Section 4. Late Fee. Stormwater management service charges are due at the
collection office within the time period stated on the bill. Bills not paid within this time
period shall be charged a late fee of $5.00.
Section 5. This Resolution shall apply to all stormwater management service
charges beginning July 1, 2008.
ADOPTED: May 6, 2008
EFFECTIVE: July 1, 2008
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Appendix F
Utility Rate Resolution
Council Approved Stormwater Credit and Adjustment Manual
Revisions:
1- Changed detention credit requirement to the 25 year design storm as a result of
City Code change requiring 10 year design storm as a standard, in addition to the
2 year design storm. TC-2-04 was approved by City Council on February
17, 2004. (Pages 9-10)
2- Council approved change to the impervious surface definition at their November
2, 2004 meeting to be consistent with the definition used in the City Code for
porous surfaces and slatted decks. (Pages 2-3)
3- Council approved increasing the maximum NPDES MS4 permit fee credit from
15 to 35 percent. (Page 10) Also, approved at the April 18, 2006 Council meeting
were changes to the inspection requirement for facilities that qualify for a
detention credit from an annual inspection certified by a professional engineer to
an annual certification by the owner or Chief Executive Officer that the detention
facility is in place and in proper working order and that an inspection and
certification by a professional engineer will be required every 3 years. (Page 14)
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