HomeMy WebLinkAbout10B - Amendment to City Code Section 1004
MEETING DATE:
AGENDA #:
PREPARED BY:
AGENDA ITEM:
DISCUSSION:
ISSUES:
CITY COUNCIL AGENDA REPORT
AUGUST 4, 2008
10B
ROSS BINTNER, WATER RESOURCES ENGINEER
CONSIDER APPROVAL OF AN ORDINANCE AMENDING SECTION 1004,
DESIGN STANDARDS, OF THE CITY CODE
Introduction
The purpose of this report is to consider an ordinance amending Section 1004
of the City Code. The proposed ordinance would update the references to
stormwater planning documents and define an expiration period for the
stormwater management report.
Current Circumstances
The intent of this ordinance revision is twofold: 1) to update referenced
documents; and 2) defined an expiration period for the stormwater
management report for areas platted and constructed with trunk storm
collection and treatment facilities previously approved.
The update of referenced documents is fairly straightforward. The
Comprehensive Stormwater Management Plan was an outdated reference and
the Surface Water Management Plan replaced it.
Defining an expiration period for stormwater treatment designed as collection
and treatment facilities is proposed. In situations where a development plats
large areas with the intention of coming back in later years to re-plat portions
as they sell, some certainty is needed for stormwater treatment and total land
requirements. Under this proposal, when collection and treatment facilities are
planned with the greater development and constructed in advance, future re-
plats of the treated area would meet local stormwater rules at the time of the
plat for 10 years. If developers are not given certainty that the stormwater
requirements are not fulfilled with the initial development, there is no incentive
to create collection and treatment facilities. The creation of regional facilities is
a goal of the City because they are more cost effective to operate and
maintain.
Since this ordinance revision deals with delegated water quality rules it's
approval is conditioned on the approval of the Scott WMO and Prior Lake
Spring Lake Watershed District.
Section 1004.800 currently reads as follows:
1004.800
Storm Drainage. All subdivision design shall incorporate
provision for storm water runoff consistent with the Public
Works Design Manual and the Comprehensive Stormwater
Management Plan.
www.cityofpriorlake.com
Phone 952.447.9800 / Fax 952.447.4245
The intent of this change is to update the references and define the
Stormwater Management Report.
1004.800
Storm Drainage. All subdivision design shall incorporate
provision for storm water runoff consistent with the Public
Works Design Manual and the Comprehe:"'rS?:e Storm'A'nter
Management Plan. Local Surface Water Management Plan
and be presented in a Stormwater Management Report (as
required in the Public Works Design Manual).
The next two sections have been added to define an expiration period for
collection and treatment facilities and explain under what conditions they can
be used. Section 1004.801 allows a phased development to build trunk
facilities for a greater plan of development and utilize them for all phases that
are designed to be treated and are constructed within 10 years of the plat.
This section also requires staff to review the approved stormwater
management report for the trunk facility when new development proposes to
use the facility to ensure that all impervious still has available treatment in the
trunk treatment system. Section 1004.802 allows phased development to
utilize stormwater trunk facilities if storage and treatment is available and
requires all untreated impervious to meet current rules.
1004.801
1004.802
In cases where trunk facilities and regional stormwater treatment
systems were planned and constructed, a Stormwater
Management Report approved as part of a Final Plat for the
underlying development will be valid for 10 years. A review of the
Stormwater Management Report provisions will be required if any
of the following is planned:
. The area tributary to trunk and regional facilities increases.
· Impervious surfaces in excess of those foreseen in the
Stormwater Management Report are planned.
· Previous phases of development under single ownership
were, redeveloped or replatted and were approved to develop
with greater impervious or pollutant loads and compensating
facilities were not constructed.
In cases where the review shows planned development would
exceed stormwater capacity planned in the approved Stormwater
Management Report one of the following courses of action is
required:
. If available, credit from a trunk facility can be used. (This
option may limit future phased development density).
. Additional stormwater management BMPs must be planned
and constructed to treat additional impervious. (New BMPs
must meet current rules).
Section 1108.600 of the Zoning Ordinance states that final determinations of
the City Council shall be supported by findings addressing the relationship of
the proposed amendment to the following policies:
FINANCIAL
IMPACT:
ALTERNATIVES:
RECOMMENDED
MOTION:
Revie~JbY:
'\
Frank BOYle.a M
1. There is a public need for the amendment.
The proposed amendment furthers the goal of the creation of trunk
facilities and gives master planned development land-use certainly for
stormwater facilities.
2. The amendment will accomplish one or more of the purposes of this
Ordinance, the Comprehensive Plan, or other adopted plans or
policies of the City.
Goals and objectives of the 2030 Comprehensive Plan include:
. Develop regional ponds as appropriate.
. Assure that subdivision stormwater plans conform to approved rules
and the local Surface Water Management Plan.
Purposes of the Zoning Ordinance include:
. Enhance the aesthetic character and appearance of the City.
. Conserve natural resources and environmental assets of the community.
The proposed amendment strives to accomplish these goals, objectives
and policies by strengthening the existing ordinance.
3. The adoption of the amendment is consistent with State and/or
Federal requirements.
This amendment is consistent with federal and state laws.
The proposed amendment is consistent with the goals and objectives of the
2030 Comprehensive Plan, the Zoning Ordinance and the enabling legislation
set forth in Minnesota statutes. Based upon the findings set forth in this report,
staff recommends approval.
There is no financial impact to the City.
The City Council has the following alternatives:
1. Adopt an ordinance amending the text of the Zoning Ordinance as
proposed or with changes specified by the City Council and forward the
ordinance to the Scott WMO and Prior Lake Spring Lake Watershed
District for final approval.
2. Deny the amendment to the ordinance.
3. Defer consideration of this item and provide staff with specific direction.
Staff recommends alternative #1 ;
nager
AN ORDINANCE AMENDING SECTION 1004 OF THE PRIOR LAKE CITY CODE
The City Council of the City of Prior Lake does hereby ordain that:
1. Sections 1004.800 will be deleted and replaced with the following:
1004.800 Storm Drainaae: All subdivision design shall incorporate provisions for
storm water runoff consistent with the Public Works Design Manual and
Local Surface Water Management Plan and be presented in a Stormwater
Management Report (as required in the Public Works Design Manual).
2. Section 1004.801 of the Prior Lake City Code is hereby added and will read thus:
1004.801 In cases where trunk facilities and regional stormwater treatment systems
were planned and constructed, a Stormwater Management Report
approved as part of a Final Plat for the underlying development will be valid
for 10 years. A review of the Stormwater Management Report provisions
will be required if any of the following is planned:
· The area tributary to trunk and regional facilities increases.
· Impervious surfaces in excess of those foreseen in the Stormwater
Management Report are planned.
· Previous phases of development under single ownership were,
redeveloped or replatted and were approved to develop with greater
impervious or pollutant loads and compensating facilities were not
constructed.
1004.802
In cases where the review shows planned development would exceed
stormwater capacity planned in the approved Stormwater Management
Report one of the following courses of action is required:
· If available, credit from a trunk facility can be used. (This option may
limit future phased development density).
. Additional stormwater management BMPs must be planned and
constructed to treat additional impervious. (New BMPs must meet
current rules).
This ordinance shall become effective from and after its passage, approval by the Scott WMO
and Prior Lake Spring Lake Watershed District, and publication.
Passed by the City Council of the City of Prior Lake this _ day of
,2008.
ATTEST:
City Manager
Mayor
c:\documents and settings\cgreen\local settings\t.emp,or~ry in,ternet files\olk5a\080804 proposed ordinance
(storm drainage) (2).doc www.Cltyof~norlake.com
Phone 952.447.9800 / Fax 952.447.4245