HomeMy WebLinkAbout10 Storm Water Management Ordinance 93-04
AGENDA:
PREPARED BY:
SUBJECT:
DATE:
10
JOEL RUTHERFORD, WATER RESOURCES COORDINATOR
DISCUSS IMPLEMENTATION OF STORM WATER
MANAGEMENT ORDINANCES 93-05, 93-06, AND 93-07.
FEBRUARY 16, 1993
INTRODUCTION:
The purpose of this Agenda item is to discuss
changes in the City Code that deal with storm
water management. These changes are required
by the Metropolitan Council, as part of their
strategy to reduce nonpoint source pollution
to all metropolitan water bodies.
BACKGROUND:
The Metropolitan Council's strategy to reduce
nonpoint source pollution to all metropolitan
water bodies, includes three requirements for
local governments. These requirements are as
follows:
(1) Adopt design standards for new storm
water ponds that will reduce the
contaminant loadings from surface
water runoff, such as those from the
National Urban Runoff Program
(NURP) ;
(2) Local governments in the
metropolitan area must follow the
"best manageme~t practices" (BMP'S)
as outlined 1n Protecting Water
Quality in Urban Areas, published by
the M1nnesota Pollution Control
Agency, or an equivalent set of
standards. The "best management
practices" manual, which is about
300 pages, is available for review
at City Hall; and
(3) Adopt the Minnesota Department of
Natural Resources current shore 1 and
regulations.
Local governments will be required to adopt
these elements before the Metropolitan Council
will approve Comprehensive Plan Amendments.
At their meeting on
Council passed a
Comprehensive Plan.
October
motion
Part of
12,
to
this
1992, City
amend the
amendment
4629 Dakota St. S.E., Prior Lake, Minnesota 55372 / Ph. (612) 4474230 / Fax (612) 447-4245
AN EQUAL OPPORTUNITY EMPLOYER
DISCUSSION:
ACTION REQUIRED:
included the adoJ;>tion of "Best Management
Practices", Wh1Ch falls under the
Metropolitan Council's requirement (2).
Although these standards have been adopted as
part of the comprehensive plan, the enclosed
ordinance is required to incorporate these
standards into the city Code.
Attached to the agenda is a listing of
additions and amendments that will incorporate
requirements (1) and (2) into the City Code.
Requirement (3), dealing with new shoreland
regulations, is a separate agenda item (#8).
To help understand each addition or
amendment, a narrative is included, describing
the intent or reason for each change.
Because the proposed changes affect both the
Subdivision and Zoning Ordinances, the
Planning Commission will be required to hold a
Public Hearing for the Subdivision and Zoning
Code amendments. This item will be on their
agenda for March 4, 1993. At the City Council
meeting on March IS, 1993, Council will hold a
Public Hearin9 for changes that are not part
of the Subdiv1sion and Zoning Code. At that
meeting, staff will recommend adoption of
Ordinance 93-05, amending the Subdivision
Code, Ordinance 93-06, amendin9 the Zoning
Code, and Ordinance 93-07, amend1ng the Code
in areas not included in Ordinances 93-05 and
93-06.
The purpose of this item on the agenda is to
advise City Council of changes in the City
Code and to receive feedback on these changes.
Prior to adoption, staff will discuss these
changes with the City Attorney and have the
appropriate ordinance written before the final
drafts are presented to the Planning
commission and City council.
The standards proposed to be implemented into
the Cit~ Code, though required by the
Metropol1tan Council, will benefit Prior
Lake residents by ensuring sound storm water
management practices to all land disturbing
activities. The methods and procedures, when
applied, will reduce the contaminant loadings
from surface water runoff, thus improving
water quality in the lakes, wetlands, streams,
and waterways of Prior Lake.
No action required, other than a review and
discussion of Council's comments and
modifications.
IThe following addition, as part of the Excavations During
Building Construction section of the Code, will require an
applicant of new building permits to submit an erosion control
plan for any activity that may disturb the land on or adjacent
to the property that the building permit is being aJ;>plied for.
[Included in Ord1nance 93-07]
Add:
4-6-3
(L) Submit a erosion control plan to the Building
Inspection Department, using methods as outlined
in the 1989 edition of Protectin9 Water Quality in
Urban Areas, published by the M1nnesota Pollution
Control Agency, or an equivalent set of standards.
No permit shall be issued until the erosion control
plan is approved by the City Engineer. The erosion
control plan requirement does not apply to:
1. Any J;>art of a subdivision if a plat for the
subd1vision has been approved by the City
Council on or before March 1, 1993.
2. Any land disturbing activity for which plans
have been approved by the watershed management
organization on or before March 1, 1993.
3. A lot for which a building permit has been
approved on or before March 1, 1993.
4. Installation of fence, sign, telephone, and
electric poles and other kinds of posts or
poles.
5. Emergency work to protect life, limb, or
property.
The following amendment applies to section 5-5-11 of the Code,
which lists the requirements for P.U.D. applications (part of the
Zoning Code.) This amendment requires that a storm water
management plan for the development be included with the
appl1cation for a preliminary P.U.D. This amendment also
describes what should be included in the storm water management
plan.
[Included in Ordinance 93-06]
Amend:
5-5-11 (D,5,c)
(3) A storm water management plan, which shall contain
the following information:
(a) Existing site Map showing the site and
immediately adjacent areas, including:
(1) The name and address of the applicant,
the section, township and range, north
point, date and scale of drawing.
(2) Location of the tract by an insert map at
a scale sufficient to clearly identify
the location of the property.
A delineation of all streams, rivers,
J?ublic waters and wetlands located on and
1mmediately adjacent to the site,
including depth of water, a statement of
general water quality and any
classification given to the water body or
wetland by the Minnesota Department of
Natural Resources, the Minnesota
Pollution Control Agency, and/or the
united states Army Corps of Engineers.
Location and dimensions of existing storm
water drainage systems and natural
drainage patterns on and immediately
adjacent to the site delineating in which
direction and at what rate storm water is
conveyed from the site, identifying the
receiving stream, river, public water, or
wetland and setting forth those areas of
the unaltered site where storm water
collects.
A description of the soils of the site,
including a map indicating soil types of
areas to be disturbed as well as a soil
reJ?ort containing information on the
sUltability of the soils for the type of
development proposed and for the type of
sewage disposal proposed and describing
any remedial steps to be taken by the
developer to render the soils suitable.
Vegetative cover and clear delineations
of any vegetation proposed for removal.
(8) 100 year floodplains, flood fringes and
floodways.
(3)
(4)
(5)
(6)
(7)
Existing
interval
the land
interval
topography with a contour
appropriate to the topography of
but in no case having a contour
greater than 2 feet.
(1)
(b) A site construction plan including:
(2)
Locations and dimensions of all
land disturbing activities
phasing of those activities.
Locations and dimensions of all temporary
soil and dirt stockpiles.
proposed
and any
(c)
(3)
(4)
(5)
Locations and dimensions of all
construction site erosion control
measures necessary to meet the standards
as outlined in the 1989 edition of
Protecting Water Quality in Urban Areas,
published by the Minnesota Pollution
Control Agency, or an equivalent set of
standards.
Schedule of anticipated starting and
comJ;>letion date of each land disturbing
act1vity, including the installation of
construction site erosion control
measures.
provisions for maintenance
construction site erosion
measures during construction.
of the
control
A plan of final site conditions
scale as the existing site map
site changes including:
(1)
(2)
(3 )
(4)
(5)
(6)
on the
showing
same
the
Finished grading shown at contours at the
same interval as provided above or as
required to clearly indicate the
relationship of proposed changes to
existing topography and remaining
features.
A landscape plan, drawn to an appropriate
scale, including dimensions and distances
and the location, type, size and
description of all proposed landscape
materials which will be added to the site
as part of the development.
A drainage plan of the developed site
delineating in which direction and at
what rate storm water will be conveyed
from the site and setting forth the areas
of the site where storm water will be
allowed to collect.
The proposed size, alignment, profiles
and intended use of any structures to be
erected on the site.
A clear delineation and tabulation of all
areas which shall be paved or surfaced,
including a description of the surfacing
material to be used; and
Any other information pertinent
particular project which in the
of the applicant is necessary
review of the project.
to the
opinion
for the
IThe following addition relates to
Subdivision Code. It adds
wetlands.
the definition section of thel
the "accepted" definition of
[Included in Ordinance 93-05]
Add:
6-2-1
Wetlands
Lands transitional between terrestrial
aquatic systems where the water table
usually at or near the surface or the land
covered b~ shallow water. For purposes
this def1nition, wetlands must have
following three attributes:
(a) Have a predominance of hydric soils.
(b) Are inundated or saturated by surface or
ground water at a frequency and duration
sufficient to support a prevalence of
hydrophytic vegetation t~picall~ adapted
for life in saturated s01l cond1tions.
and
is
is
of
the
(c) Under normal circumstances support a
prevalence of such vegetation.
IThe following amendment to the prelimina~ plat application,
which is part of the Subdivision Code, requ1res the applicant to
submit a better description of the proJ;>osed development's
existing conditions. This information 1S needed to better
assess how the development will impact the site.
[Included in Ordinance 93-05]
Amend:
6-4-2
(J) Physical features which shall include:
1. A delineation of all streams, rivers,
J;>ublic waters and wetlands located on and
1mmediately adjacent to the site,
including depth of water, a description
of all vegetation which may be found in
the water, a statement of general water
quality and any classificat10n given to
the water body or wetland by the
Minnesota Department of Natural
Resources, the Minnesota Pollution
Control Agency, and/or the United states
Army Corps of Engineers.
2. Location and dimensions of existing storm
water drainage systems and natural
drainage patterns on and immediately
adjacent to the site delineating in which
direction and at what rate storm water is
conveyed from the site, identifying the
receiving stream, river, public water, or
wetland and setting forth those areas of
the unaltered site where storm water
collects.
3. A description of the soils of the site,
including a map indicating soil types of
areas to be disturbed as well as a soil
reJ;>ort containing information on the
sU1tability of the soils for the type of
development proposed and for the type of
sewage disposal proposed and describing
any remedial steps to be taken by the
developer to render the soils suitable.
4. Vegetative cover and clear delineations
of any vegetation proposed for removal.
5. 100 year floodplains, flood fringes and
floodways.
\Addition of 6-4-3 requires all preliminary plat applicants to
include, with their proposals, a site construction plan. 6-4-3
also describes what should be included in the site construction
plan. This sub-section as added to the Subdivision Code.
[Included in Ordinance 93-05]
Add:
6-4-3
(M) A site construction plan including:
(1)
Locations and dimensions
disturbing activities and
activities.
(2) Locations and dimensions of all temporary soil and
dirt stockpiles.
of
any
all J;>roposed land
phas1ng of those
(3 )
Locations and dimensions of all construction site
erosion control measures necessary to meet the
standards as outlined in Protecting Water Quality
in Urban Areas, published by the Minnesota
Pollution Control Agency, or an equivalent set of
standards.
(4)
Schedule of anticipated starting and completion
date of each land disturbing activitf, including
the installation of construction s1te erosion
control measures.
(5)
Provisions for maintenance of the construction site
erosion control measures during construction.
(N) A plan of final site conditions on the same scale as the
J;>hysical features map showing the site changes
1ncluding:
1. Finished grading shown at contours at the same
interval as provided for the existing contours, or
as required to clearly indicate the relationship of
proposed changes to existing topography and
remaining features.
2. A drainage plan of the developed site delineating
in which direction and at what rate storm water
will be conveyed from the site and setting forth
the areas of the site where storm water will be
allowed to collect.
3. The proposed size, alignment, profiles and intended
use of any structures to be erected on the site.
IAmendment of 6-6-6 (A) and (B),
the subdivision code, restricts
disturbances that are permitted
the Wetland Conservation Act.
which details Design Standards in
wetland disturbance to only those
within the rules established by
[Included in Ordinance 93-05]
Amend:
6-6-6
(A)
Amend:
6-6-6
( B)
Wild Life Habitat and Water Recharge Areas: Marsh areas
which are part of the proposed development shall be
analyzed for purposes of preservation as potential wild
life habitat for birds and animals as well as to
continue providing water purification and recharge areas
for the lake of Prior Lake. If the City Council
determines that marsh areas serve the public in one or
more of these functions then they may require
preservation in whole or in part. Any alterations or
disturbance shall comply with the requirements of the
Wetland Conservation Act, and other legislation that may
limit disturbance to wild life habitat and water
recharge areas.
be drained or
replaced by
least equal
Conservation
Filling or Draining: Wetlands must not
filled, wholly or partially, unless
restoring or creating wetland areas of at
public value, as permitted by the Wetland
Act.
IThe amendment of 6-6-7, also part of the Design Standards \
sub-section of the Subdivision Code, describes the standards for
storm sewer systems in new developments.
[Included in Ordinance 93-05]
Amend:
6-6-7:
STORM WATER MANAGEMENT:
(A)
Storm water
facilities:
1. The sub-divider shall use the standards and
guidelines presented in the 1989 edition of
Protectinq Water Quality in Urban Areas, published
by the Minnesota Pollut1on Control Agency, or an
equivalent set of standards.
management
criteria
for
permanent
2. The sub-divider shall install or construct, on or
for the proposed land disturbing or develo~ment
activity, all storm water management faci11ties
necessary to manage increased runoff so that the
two-year, ten-year, and 100-year storm peak
discharge rates existin9 before the proposed
development shall not be 1ncreased and accelerated
channel erosion will not occur as a result of the
proposed land disturbing or development activity.
The sub-divider may also make an in-kind or
monetary contribution to the development and
maintenance of community storm water management
facilities designed to serve multiple land
disturbing and develoJ;>ment activities undertaken by
one or more persons, 1ncluding the sub-divider.
16-7-10, which describes drainage
Code, is amended to add the
management practices" and the
National Urban Runoff Program.
improvements in the Subdivision I
standards of the MPCA's "best
standards developed from the
[Included in Ordinance 93-05]
Amend:
6-7-10
Drainage:
( B)
A drainage system as approved by the City Engineer
shall be provided.
Storm water detention facilities constructed in the
City of Prior Lake shall be designed according to
the standards reflected in the 1989 edition of the
MPCA publication "Protecting Water Quality in Urban
Areas", and the design criteria from the National
Urban Runoff Program.
(A)
lAmendment of 9-6-4, which is the Excavating and Filling sectionl
of the Code, requires the applicant to include an erosion control
plan with their aPJ?lication. This amendment also describes what
should be included 1n this plan.
[Included in Ordinance 93-07]
Amend:
9-6-4
An erosion control plan, which shall contain the
following information:
(a) Existing site Map showing the site and
immediately adjacent areas, including:
(A) 9.
(1)
(2)
(3)
A delineation of all streams, rivers,
J?ublic waters and wetlands located on and
1mmediately adjacent to the site,
including depth of water, a statement of
general water quality and any
classification given to the water body or
wetland by the Minnesota Department of
Natural Resources, the Minnesota
Pollution Control Agency, and/or the
united states Army Corps of Engineers.
Location and dimensions of existing storm
water drainage systems and natural
drainage patterns on and immediately
adjacent to the site delineating in which
direction and at what rate storm water is
conveyed from the site, identifying the
receiving stream, river, public water, or
wetland and setting forth those areas of
the unaltered site where storm water
collects.
A description of the soils of the site,
including a map indicating soil types of
areas to be disturbed as well as a soil
reJ?ort containing information on the
sU1tability of the soils for the type of
development proposed and for the type of
sewage disposal proposed and describing
any remedial steps to be taken by the
developer to render the soils suitable.
Vegetative cover and clear delineations
of any vegetation proposed for removal.
(5) 100 year floodplains, flood fringes and
floodways.
(4)
(b) A site construction plan including:
(1)
Locations and dimensions of all
land disturbing activities
phasing of those activities.
proposed
and any
(c)
(2) Locations and dimensions of all temporary
soil and dirt stockpiles.
(3) Locations and dimensions of all
construction site erosion control
measures necessary to meet the standards
as outlined in Protectinq Water Quality
in Urban Areas, published by the
Minnesota Pollution Control Agency, or an
equivalent set of standards.
(4) Schedule of anticipated startin9 and
completion date for each installat10n of
erosion control measures.
(5) provisions for maintenance
construction site erosion
measures during construction.
of the
control
A plan of final site conditions
scale as the existing site map
site changes including:
(1) Finished grading shown at contours at the
same interval as provided above or as
required to clearly indicate the
relationship of proposed changes to
existing topography and remaining
features.
on the
showing
same
the
(2) A landscape plan, drawn to an appropriate
scale, including dimensions and distances
and the location, type, size and
description of all proposed landscape
materials which will be added to the
site.
(3) A drainage plan of the developed site
delineating in which direction and at
what rate storm water will be conveyed
from the site and setting forth the areas
of the site where storm water will be
allowed to collect.
(4) The proposed size, alignment, profiles
and intended use of any structures to be
erected on the site.
(5)
Any other information pertinent
particular project which in the
of the applicant is necessary
review of the project.
to the
opinion
for the
PROJECT FINANCING SUMMARY
Financing of this project cost is as follows:
1.) Assessments ............ $1,008,000.00
2.) Tax Levy ............... $1,935,000.00
3.) B.O.P. Land Sale ....... $ 188,000.00
4.) Trunk Reserve .......... $ 214,700.00
5.) Enterprise Fund ........ $ 142,000.00
6.) Storm Water Fee ........ $ 23,300.00
Project Cost Total..... $3,511,000.00
FEASIBILITY STUDY PROJECT LIST AND COST
AREA 1 - BUSINESS OFFICE PARK -
AREA 2 - LIME ROAD AND CENTER ROAD -
AREA 3 - FOREST OAKS SEWER, WATER, AND PAVING -
AREA 4 - CSAH 21 IMPROVEMENTS -
AREA 5 - EXISTING INDUSTRIAL PARK STORM SEWER -
AREA 6 - CSAH 42 FROM FERNDALE AVE TO BOONE AVE
AREA 7 - FISH POINT RD IN GREENBRIAR PARCEL -
AREA 8 - CARRIAGE HILL ROAD -
AREA 9 - LEMLEY CIRCLE STORM SEWER -
AREA 10 - TRAFFIC CONTROL SIGNAL AT T.H. 13-
& FIVE HAWKS AVENUE
AREA 11 - BITUMINOUS SEAL COAT OF CITY STREETS -
AREA 12 - THE POND ATHLETIC COMPLEX PARKING -
LOTS AND ROAD PAVING
AREA 13 - CIVIL DEFENSE SIRENS -
TOTAL PROJECT COST - AREAS 1-13
$1,334,000
$132,000
$110,000
$405,000
$100,000
- $735,000
$ 35,000
$ 60,000
$125,000 c '"
$100,000 I
~
$ 60, 000 i(
$3,511,000
PROJECT ASSESSMENT SUMMARY
AREA 1 - BUSINESS OFFICE PARK
ASSESSMENT AMOUNT - $791,000.00, Rate - $35,954/acre
AREA 2 - LIME ROAD AND CENTER ROAD
ASSESSMENT AMOUNT - $132,000.00, Rate - $48/front foot
AREA 3 - FOREST OAKS SEWER, WATER, AND PAVING
PROJECT COST - $110,000
ASSESSMENT AMOUNT - Sanitary sewer, water - $42,000
ASSESSMENT RATE - $6,000 per assessable lot, (7 lots)
ASSESSMENT AMOUNT - Street - $43,000
ASSESSMENT RATE - $4,300 per assessable lot, (10 lots)
ASSESSMENT AMOUNT - Storm sewer
TRUNK RESERVE - Storm sewer
- $23,300
- $ 1,700
1-/
IV. PROJECT COSTS
A. Tax levy amount of $1,935,000.00 would have the
following effect on the market value homesteads
for a ten year bond issue
MARKET VALUE $85,000 $100,000 $125,000 $150,000 $175,000
AVG. ANNUAL $30.79 $40.21 $55.92 $71.63 $87.35
INCREASE