CITY OF SHAWNEE
POLICY STATEMENT
SUBJECT
Stormwater Management Program: Drainage
System Improvements and Maintenance
POLICY
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BACKGROUND
One goal of the City’s Stormwater Management Program is to provide a public drainage system that will
collect and convey stormwater runoff from properties within the City limits. The City’s publicly maintained
drainage system includes enclosed systems which utilize inlets and pipes or other underground conduits,
and may also include open swales, ditches, and channels. Stormwater drainage has historically been
routed through open ditches and drainage ways to larger creeks. Drainage facilities to better handle
stormwater runoff have been constructed as development occurred in the City. These drainage facilities
require routine maintenance to keep the system operating as originally designed. In some cases, the
stormwater drainage facilities constructed in the past are not adequately sized to comply with current
stormwater management regulations, which typically require a higher level-of-service. Also, many
drainage facilities are nearing the end of their design life and require replacement, or need significant
renovations or repairs to restore their original stormwater collection/conveyance capacity. As a result of
these deficiencies and other localized situations, some landowners in the City have experienced
stormwater drainage problems such as street, building, and yard flooding; pipe and inlet failures; or
excessive soil erosion.
The City has a diverse network of different types of publicly maintained roadways to facilitate vehicular
traffic and travel throughout the City. In some areas, ditch section streets continue to be utilized, typically
with a road ditch running parallel to the roadway along both sides of the pavement to convey stormwater.
Residential and other development has occurred and continues to occur along these roadways, requiring
installation and maintenance of culverts to allow vehicular traffic to cross these ditches while allowing
stormwater to flow in the ditches. The criteria used to determine culvert location and maintenance has
been interpreted in different ways over time by the City and other stakeholders. This policy establishes
procedures for the City, builders, developers, and landowners in determining where culverts are needed,
who is to construct and also who shall maintain the culverts.
PURPOSE
Recognizing that stormwater drainage problems can create safety hazards, health hazards, and devalue
property, the purpose of this policy is to establish guidelines and specific criteria to identify the public
drainage system and to prioritize maintenance activities and capital improvement projects, which will
properly maintain or correct stormwater drainage problems on the publicly maintained stormwater
drainage system within the City. It also provides guidance for instances when the City may address
private drainage system issues.
POLICY
It is the policy of the City of Shawnee that all stormwater drainage problems related to the publicly
maintained drainage system, which can be corrected through maintenance activities or through a capital
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
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improvement project, will be evaluated and prioritized as described herein. Where a City stormwater
improvement or maintenance project is recommended under this policy, a public drainage easement,
temporary construction easement, or right-of-entry will be obtained from the appropriate landowner(s) in
accordance with Policy Statement PS-33, Acquisition of Right-of-Way and Easement for City
Improvement Projects, before proceeding with the improvement project. In addition, Policy Statement
PS-51, Sump Pump Discharge Facilities within the Right-of-Way, addresses surface water issues not
covered in this policy.
City Maintenance
The City has the primary responsibility for repairs, upgrades, and maintenance of all elements of the
public stormwater drainage system. The City requires that private stormwater drainage systems and
other stormwater management facilities, not part of the public system, be maintained by the respective
landowners.
The City provides maintenance on publicly maintained stormwater drainage facilities to ensure the
facilities retain their original design capacity to handle stormwater runoff. Over the years, the City has
allowed landowners to develop their property and leave the drainage channels in the City in a natural,
unaltered state to provide green space and natural environments throughout our community. In most
cases, the only maintenance activity provided by the City on natural channels is removal of large items
causing a substantial blockage of stormwater flow that may cause flooding, or imminent flooding, of
habitable structures or roadways. The majority of the City’s stormwater drainage maintenance activities
occur on piped systems, improved channels, and road ditches.
Landscaping and Fencing
The City will reinstall or repair fencing damaged or removed during City maintenance activities. Fences
in drainage easements that block flow of runoff will be re-installed outside the limits of the drainage
easement or to a location that will not cross the flow of runoff or impede access for maintenance activities.
The City may allow fences to be placed within drainage easements when it does not obstruct the flow of
stormwater runoff. Where specially allowed by a formal letter from the City, the fence shall have a
minimum gap of four (4) inches above the ground and/or sufficient gaps between vertical portions of the
fence to allow the passage of stormwater runoff. Properly locating and maintaining a fence is the
responsibility of the landowner. Landscaping rocks, timbers, borders, trees or small plantings and bushes
located within drainage easements or rights-of-way will not be replaced by the City if disturbed during a
City maintenance project. Whenever possible, the City will provide time for the landowner to relocate
existing vegetation or other materials. The City will make reasonable attempt to salvage and stockpile
landscape timbers, borders, and other materials affected by the stormwater repairs for the landowner.
The City will restore areas disturbed by City maintenance activities with grass seed covered by temporary
erosion control mat.
Roadside Ditches; Driveway and Pedestrian Access Culverts; Other Ditches
Roadside ditches and driveway and pedestrian access culverts in the right of way are part of the public
storm drainage system. The function of culverts and ditches installed or constructed as required when a
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
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property was developed, must be preserved to help prevent street and property flooding and deterioration
of the roadway. Ditches may become silted in over time due to natural accumulation of sediment. This
policy provides for the clearing of sediment from ditches to restore drainage function. Cleaning and even
replacement of such culverts when required is also provided for in this policy.
Filling in of ditches with or without a culvert, for purposes other than what is required for an approved
driveway or pedestrian access, is prohibited. Drainage ditches or swales not in the right-of-way, but in
drainage easements, may be cleared by the City if conditions warrant such work. Landowners may not
alter engineered swales without obtaining approval by the Director.
Private System Maintenance
Most routine maintenance activities such as mowing of grass, weed spraying, tree trimming, overseeding, re-seeding, removing of leaves and other yard debris, repairing minor erosion, creek bank
stabilization to prevent loss of land due to erosion, etc., are the responsibility of the landowner. The
landowner must maintain, keep clear, and remove or replace as necessary any privately maintained ditch
culverts. Stormwater drainage problems caused by improper grading of yards are the responsibility of
the landowner(s) to correct. If a utility facility is the cause for a drainage problem, the utility company
shall be responsible to move or modify the facility to correct the problem.
The City does not proactively inspect or provide maintenance on private stormwater management
systems as this responsibility belongs to the landowner, and is part of the City’s property maintenance
code requirements. However, in some cases, the City Manager, or his/her designee, may determine it
is in the public interest to provide temporary or emergency maintenance or improvements on a private
system to protect life or property. In other cases, the City may have specialized skills or equipment that
can be utilized, as authorized by this policy, to aid landowners with maintenance of a private stormwater
system (such as a vacuum truck and crews trained in clearing sediment filled stormwater pipes). In such
instances, the City may provide limited maintenance on a stormwater system that is not publicly
maintained. The landowner responsible for the maintenance of a private drainage system shall provide
a “right-of-entry, release of liability, or other document(s)” as may be required by the Director before any
work by the City can begin.
Driveway Culverts
Driveway culverts are required for all new construction on ditch section streets unless the requirement is
waived by the City Engineer. The driveway culvert shall be designed in accordance with this policy and
the Shawnee Design and Construction Manual.
Construction of Driveway Culverts:


The installation of culverts in ditches for reasons other than to accommodate a driveway or
pedestrian access is prohibited.
The cost and construction of driveway culverts, located in the right-of-way, for new or
redevelopment construction, including installation, shall be the responsibility of the builder,
developer, or landowner.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance

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Construction in the right-of-way may require a Public Improvement Permit and will require a Work
in the Right-of-Way permit, and all work shall be completed before the final inspection is made by
the building inspector.
Maintenance of Driveway Culverts:


Existing driveway culverts, located in the right-of-way, which are in need of replacement due to
deterioration or insufficient capacity shall be replaced by the City. The Director will make the
determination as to whether a culvert has deteriorated or has insufficient capacity to a degree that
it should be replaced.
Existing driveway culverts, which become damaged by the landowner or others, are considered
as any other type of property damage, and shall be repaired or replaced by the landowner.
Use of Stormwater Maintenance Funds
Funding for stormwater drainage maintenance and Capital Improvement Projects may not be adequate
to complete every project identified. Funding for stormwater drainage maintenance and capital
improvement Projects will be prioritized and appropriated according to the established prioritization
procedures below. The City Council has placed high priority on projects eligible for Johnson County
Stormwater Management Program (JCSMP) funding or other funding from other outside sources. City
staff shall continue to conduct preliminary engineering studies to investigate stormwater drainage
problems in order to maintain a list of projects with JCSMP that qualify for funding through JCSMP.
DEFINITIONS
Capital Improvement
Project:
Any stormwater infrastructure improvement project that costs more than
$150,000.
Director:
The Director of Public Works and/or the Director of Development Services
or their designees, depending on the work area being addressed.
Private Drainage System
All stormwater drainage collection or conveyance facilities that are not
considered part of the Public Drainage System as defined herein. The
private drainage system includes connections from a private system to a
public system, even if the private connection and associated piping is
located in the right-of-way or drainage easement.
Public Drainage System:
Any stormwater infrastructure that meets any of the following criteria:
a)
Infrastructure designed to collect or convey stormwater located in the
public right-of-way, with the following exceptions:
1) A separate agreement or document establishes private ownership
or private maintenance responsibilities.
2) Extensions of a private system to connect to a public system.
Private connections and associated piping/structures are not part
of the public drainage system.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
b)
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Enclosed conveyance facilities (such as pipes, concrete stormwater
boxes, etc.) that receive stormwater from an enclosed conveyance
facility on a neighboring property and have a dedicated easement for
the stormwater conveyance facility with the following exceptions:
1) A separate agreement or document establishes private ownership
or private maintenance responsibilities (for example: private
detention facilities in-line with an otherwise public system).
2) Extensions of a private system to connect to a public system.
Private connections and associated piping/structures are not part
of the public drainage system.
c)
Stormwater Maintenance
Activity:
Open channel conveyance elements, natural or improved, which have
a dedicated drainage easement.
Stormwater infrastructure cleaning, repairs, or other improvement projects.
These are typically completed by City staff with City equipment, but in some
cases they may require engineering plans and are completed by contract.
PROCEDURE
I.
Standard Procedure After a Stormwater Drainage Concern is Reported
A.
City staff will visit the site of the concern and/or assess the site on City mapping resources.
Decisions regarding the resolution of the drainage concern will be communicated to the
person reporting the concern as needed.
B.
City staff will determine the likely cause of an identified drainage problem and determine if it
is appropriate for the City to expend time, materials, labor, and/or City funds for a repair. In
general, staff will follow the principles set forth in this policy to determine if the City will be able
to provide assistance.
C.
In some cases, the City may determine that the solution to the drainage problem is the
responsibility of the property owner. City staff may provide potential options for the landowner
to pursue, where possible, and will provide information from this policy. Depending on the
options pursued, the landowner may need the services of a qualified professional.
D.
Staff may recommend one or more of the following maintenance activities be provided by the
City to correct stormwater drainage problems:
1.
Re-grade street ditches on unimproved streets to remove silt and re-establish the bottom
of the ditch to meet the flow line of the culverts along the ditch.
2.
Restore original ditch capacity on ditch section streets. This may include removal of
ditch culverts and road-side parking areas or yard modifications on ditch section streets.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
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3.
Re-grade side yard and backyard swales that are part of the publicly maintained
drainage system to re-establish the proper flow line and proper width of a drainage
swale.
4.
Remove silt deposits or re-grade ditches from roadways and driveway culverts and from
the ditch or channels immediately upstream and downstream of the culvert to restore
original functionality.
5.
Place rip-rap material at the downstream end of a publicly maintained pipe to prevent
erosion of the bottom of the open channel that might threaten the pipe, end section, or
other improvements.
6.
Remove silt deposits and other obstructions to normal flow from piped systems.
7.
Repair damaged or deteriorated pipe, inlets, and junction boxes as necessary.
8.
Replace settled curbs or raise the grade of the adjoining right-of-way to prevent
stormwater runoff from a 10-year storm from flowing off of the street and onto private
property.
9.
Remove fallen trees or other large obstructions located below the top of bank of natural
streams, when this blockage may cause flood damage to buildings or other structures
or as determined by the Director.
10.
Repair or replace fences along improved channels or at culvert headwalls only if the
fence was constructed by the City for safety reasons. Maintenance of fences
constructed to define property lines or enclose landowner’s yards is the responsibility of
the landowner.
11.
Repair severe erosion threatening public improvements or other property as provided
for in this policy.
12.
Repair sinkholes or ground settlement associated with failure of the public storm
drainage system.
If a maintenance activity listed above is identified to mitigate a stormwater drainage problem,
it will be prioritized in accordance with Section II below.
E.
The City may consider actions to mitigate problems caused by other surface water problems
resulting from groundwater springs or flows from other sources when they affect the right-ofway. These actions may be pursued where viable solutions are identified and when funding
is available.
F.
If a stormwater drainage project has a total estimated cost of less than $150,000, then it will
be prioritized with the maintenance activities as indicated in Section II below. If a stormwater
drainage improvement project is budgeted to cost at least $150,000, then it will be prioritized
as a capital improvement project in accordance with Section III below.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
G.
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City staff may decide that, based on the circumstances of the stormwater drainage problem,
a Work Order will be placed on the Problem Action List (PAL). The PAL includes stormwater
drainage problems that:

Require further study to determine the most appropriate solution; or,

May be addressed by the City as part of a future capital improvement project; or,

Have solutions that will cost more than $150,000.
Stormwater drainage problems on the PAL may be scheduled for further study and developed
into projects as City resources and funding become available. Selected projects may be
prioritized with other capital improvement projects as indicated in Section II below.
H.
II.
All reported stormwater drainage problems are tracked on City mapping software for future
reference by City personnel when needed.
Prioritization of Maintenance Work Orders
A.
Stormwater system maintenance work orders will be written when problems are determined
to be the responsibility of the City to resolve. Such work orders will be prioritized according
to the criteria set forth in Table 1 below. Those work orders within the same priority category
shall be completed in chronological order although the Director may identify work orders that
require expedited completion to facilitate progress of a public project or meet other time
sensitive requirements.
B.
The criteria for establishing priorities for stormwater maintenance work orders is based on
assessment of factors concerning public safety, protection of public infrastructure, and
protection of private property.
1.
Stormwater system maintenance needs that are urgent for the sake of public safety are
categorized as either an emergency or high priority depending on the severity and
location of the problems.
2.
Stormwater system maintenance needs that are anticipated to compromise public
safety, public infrastructure, or private property in the near future are categorized as
medium priority.
3.
Stormwater system maintenance concerns that are not anticipated to compromise public
safety, public infrastructure, or private property are categorized as low priority. Low
priority maintenance concerns may not be assigned a work order depending on the
availability of resources in the department. These low priority items will be tracked and
periodically reviewed by the Director for any needed change in priority category.
Landowners will be asked to notify the City if conditions change and the location needs
to be re-evaluated.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
C.
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Landowners are responsible for performing routine maintenance to the public drainage
system, such as mowing vegetation, clearing leaves, and removing other debris from road
ditches and driveway culverts. Prior to commencing any digging, the landowner is responsible
for contact Kansas One-Call to identify the location of possible utilities and for obtaining a
Right-of-Way Work Permit from the City.
TABLE 1 – MAINTENANCE AND REPAIR ACTIVITY WORK ORDER PRIORITY
(PRIORITIZED BY THE STORMWATER DRAINAGE PROBLEM TO BE ADDRESSED)
Work Order Priority: EMERGENCY
Immediate Action Required

Sinkhole or void under roadway, bridge, driveway approach, or sidewalk

Drainage system cleaning needed to alleviate active flooding of a roadway or
habitable building caused by a failed or blocked pipe, or drainage structure

Storm cleanup – necessary to re-establish functionality of storm drainage system
(emergency operations decision/process)
Work Order Priority: HIGH
Timely Action Required

Sinkhole adjacent to a roadway, bridge, driveway approach, or sidewalk

Sinkhole on private property related to publicly maintained storm drainage
infrastructure

Maintain existing system capacity – remove significant debris clogging a cross road
culvert or inlet on Minor Arterial or Major Collector

Maintenance actions to minimize potential for flooding of a habitable building

Repair major erosion – less than ten (10) feet from a habitable building or public
improvement, which threatens the subject building or improvement

Remove debris clogging improved or unimproved drainage way – when flooding of
habitable building or roadway has occurred or appears likely

Replace or repair a failing stormwater drainage pipe or structure – where an adverse
effect (sinkhole, etc.) to private property or public infrastructure appears likely

Any work order that should be done sooner than when Medium priority category has
indicated (as determined by the Director)
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
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Work Order Priority: MEDIUM
Priority Maintenance

Repair a pipe or other drainage structure failure – occurring under or near a public
roadway and which may cause roadway settlement or stormwater structure failure,
but such settlement or failure does not appear to be imminent

Maintain existing system capacity – remove significant debris clogging a culvert,
inlet, or ditch on Minor Collector or Local Street

Follow up work to a Community Service Request Work Order or a public drainage
project

Repair major erosion – less than thirty (30) feet from a habitable building or public
improvement, which, if left uncorrected, will threaten the subject building or
improvement

Replace or repair deteriorated driveway culverts

Replace or repair damaged or deteriorated drainage pipes and structures causing
settlement, public infrastructure failure, or blockage

Repair or replace failing improved channels

Remove significant obstructions in improved or unimproved drainage way when
flooding of habitable building or roadway may be possible, but does not appear likely

Any work order that should be done sooner than when Low priority category has
indicated (as determined by the Director)
Maintenance Concerns: LOW Priority
Acknowledged maintenance concerns (to be tracked and re-evaluated as necessary)

Remove partial obstructions within improved or unimproved channels up to top of
bank elevation

Repair minor erosion of natural channel – more than thirty (30) feet from habitable
building or public improvement, which, if left uncorrected, will threaten the nearby
improvements

Replace driveway culvert due to insufficient capacity

Repair a failing stormwater drainage pipe or structure where an adverse effect
(sinkhole, etc.) to private property or public infrastructure does not appear to be likely

Routine driveway culvert clearing

Prevent stormwater runoff from 10-year storm from flowing off the street and onto
private property
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
III.
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
Debris removal

Ditch maintenance

Remove or trim trees that threaten the integrity of an improved channel

Mitigate drainage issues in the right of way caused by flow from natural springs or
other sources depending on severity
Prioritization of Stormwater Drainage Capital Improvement Projects
Stormwater drainage projects to correct deficiencies shall be added to Shawnee’s Capital
Improvement Program (CIP) based on the estimated project cost being over $150,000, availability
of funding, staff workload, and the following prioritization guidelines:
A.
Priority Criteria:
Priority 1 – Stormwater drainage projects receiving funding through the Johnson County
Stormwater Management Program (JCSMP). These locations will be added to the CIP for the
year funding is awarded by JCSMP. The availability of the City’s matching funds and the
workload limits for City staff to manage the capital projects will be considered before adding
projects with JCSMP funding to the CIP.
Priority 2 – Stormwater drainage projects to alleviate drainage problems which cause flooding
of a habitable structure but do not qualify for JCSMP funding may be added to the CIP.
Priority 3 – Stormwater drainage projects that will alleviate erosion which, if uncorrected, will
threaten the structural integrity of a residential structure.
(The policy of the City is to stabilize the existing channel bank when erosion of a natural channel comes within thirty
(30) feet of a habitable structure as measured from the top of the channel bank. These types of problems may be
handled by either a City crew or an outside contractor.)
Priority 4 – Stormwater drainage projects that will improve conditions, which constitute a
nuisance (i.e., waterborne trash, debris, minor erosion, pooling of water, etc.) to adjoining
landowners or which detract from the appearance of an area.
B.
IV.
Other Priority Weighting Factors Which May be Considered:
1.
The number of properties impacted by the stormwater drainage problem.
2.
The length of time the stormwater drainage problem has existed.
3.
The percentage of the improvement cost the landowner(s) will contribute toward the
project.
4.
The additional cost to be incurred as a result of delaying the project, other than
inflationary cost increases.
Easements
Easements will be acquired in accordance with current City policy as outlined in Policy Statement
PS-33, Acquisition of Right-of-Way and Easement for City Improvement Projects.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
V.
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Installation of New or Replacement Culverts
A.
A Right-of-Way Work Permit must be obtained by the landowner, or his/her contractor, prior
to installing a new or replacement driveway approach with a culvert on a non-curb street. The
following stipulations apply:
1.
For new installations or installations associated with new construction, the City may
require plans, details, and calculations sealed by a Kansas licensed Professional
Engineer demonstrating to the satisfaction of the City Engineer that the culvert complies
with all requirements of the Shawnee Design and Construction Manual and includes all
details necessary to properly install the culvert as designed.
2.
For replacement of an existing driveway culvert with a culvert of the same or larger
capacity, the City may require plans and details demonstrating to the satisfaction of the
City Engineer that the culvert meets or exceeds the capacity of the existing pipe and
ditch system and conforms to all other applicable requirements of this section.
3.
Documentation that the design and installation meet the following guidelines:
a)
When installing a new culvert under a driveway approach, or when replacing an
existing driveway culvert where the flow line elevations of the new culvert are to
be different from the original elevations, the landowner, or his/her contractor, is
responsible to grade a new road ditch, as necessary, to provide positive drainage.
The road ditch along the entire lot frontage shall be re-graded as necessary to
provide proper width and side slopes to accommodate the design flows for the
ditch. The re-graded ditch shall provide a smooth transition to existing ditches and
shall not adversely affect drainage characteristics of adjacent properties. Once
graded, the ditch shall have a minimum longitudinal slope as close to two percent
(2%) as possible. Rock rip-rap may be required at transitions or if design velocities
exceed allowable velocities for turf.
b)
The culvert shall have a minimum height of fifteen (15) Inches and be installed with
flared end sections.
c)
A concrete driveway approach must include a minimum of two (2) feet of asphalt
pavement adjacent to the existing roadway pavement, and there shall be a smooth
transition from the existing roadway to the new pavement.
d)
An existing gravel drive approach must be replaced with an asphalt or concrete
driveway approach to the right-of-way limit.
e)
The ground slope from edge of driveway pavement to edge of culvert shall be no
steeper than a ratio of four (4) units horizontal to one (1) unit vertical. If the road
ditch is not located within the existing street right-of-way, the landowner is
responsible for dedicating a drainage easement at least fifteen (15) feet in width
adjoining the right-of-way for a road ditch.
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
f)
VI.
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In case of a conflict with other design standards, the more stringent standard shall
apply.
B.
The landowner, or his/her contractor, must obtain a Right-of-Way Work Permit for all grading
and construction activities within the street right-of-way necessary for the installation of a
driveway approach. The landowner, or his/her contractor, is responsible for contacting
Kansas One-Call to identify the location of possible utilities prior to submitting an application
for the Right-of-Way Work Permit.
C.
In addition to the above, the following apply to projects completed by the City on driveway
culverts:
1.
Street and driveway pavement within the right-of-way will be repaired using either
asphalt or concrete to match the existing paving material. Gravel driveways disturbed
by construction will be restored with asphalt up to the edge of right-of-way.
2.
Requirements for plans, details, engineering, and certification/design by a Kansas
licensed Professional Engineer are waived for maintenance activities performed by City
personnel.
Private System Special Assistance
If the City determines that the solution to a reported stormwater drainage problem is the
responsibility of the landowner, the landowner may request special assistance from the City
Manager, as described above, in instances where:

Temporary or emergency maintenance or improvements on a private system are necessary
to protect against loss of life or significant property damage; or,

The City may have the specialized skills or equipment necessary to correct the problem.
The proposed maintenance item will be prioritized and completed in accordance with Section II of
this policy. Prior to beginning the maintenance activity for all but emergency services, the
landowner(s) shall provide such documentation as required by the City, which will include a “hold
harmless” agreement, right-of-entry, or other documentation indicating that the City is under no
obligation or requirement to provide additional maintenance activities in the future.
VII. Private System Transferred to the City
If a landowner or group of landowners desire the City to assume responsibility for a private storm
sewer or engineered channel as part of the publicly maintained stormwater drainage system, they
shall satisfy the following requirements:
A.
Demonstrate that stormwater collected or conveyed by a public drainage system from an
adjoining property or a public street right-of-way is discharged into and conveyed by either a
private storm sewer or engineered channel.
B.
Demonstrate that it is in the general public interest for the City to maintain the system and not
the private landowner(s).
POLICY STATEMENT
Stormwater Management Program: Drainage
System Improvements and Maintenance
POLICY
NO.
EFFECTIVE
DATE
REVISION
DATE
PS-08
05/27/1980
09/14/2015 13 of 13
PAGE
C.
Demonstrate through an engineering analysis that the private system complies with current
capacity standards for both the required in-system design flows and 100-year overflows.
D.
Demonstrate through video or other inspection evidence that the existing stormwater
collection and conveyance elements of the private system are in sound condition and have
an anticipated remaining design life of at least fifty (50) years. Typically, this will require that
the existing private system is constructed of concrete pipes and reinforced concrete inlets and
junction boxes.
E.
Dedicate public drainage easements to the City in accordance with current City policies and
standards.
IMPLEMENTATION
This policy shall remain in force until officially changed by the majority of the Council Members present
and voting; where the number of the favorable votes is one (1) less than required passage, the Mayor
shall have the power to cast the deciding vote in favor of the action.
CITY COUNCIL APPROVAL AND REVISION DATES
May 27, 1980; September 25, 2000; May 27, 2003; August 8, 2011; September 14, 2015
OTHER REFERENCE (COMMITTEE MEETINGS)
July 19, 2011
Public Works and Safety Committee, Agenda Number 1b
Michelle Distler, Mayor
Stephen Powell, City Clerk