12-17-07 (Joint Meeting)�r
Y
Date: December 12, 2007
Planning
763-593-8095 / 763-593-8109 (fax)
To: Planning Commissioners
Open Space and Recreation Commissioners
Environmental Commissioners
From: Joe Hogeboom, Planning Intern
Subject: Comprehensive Plan Update: Surface Water Chapter
This month's Joint Commission Meeting (Monday, December 17) will focus on the Surface
Water Chapter of the Comprehensive Plan. Enclosed you will find an overview report of the
Surface Water Chapter, which summarizes the element. You will also find copies of four (4)
separate maps that are included in the Surface Water Chapter. The Surface Water Chapter in
its entirety is a lengthy document, and will be available to view at a later time.
Please be aware that we will return to our ordinary timeframe for Monday's meeting, starting
with dinner at 5:45 and finishing at 7:30. Consultants from Barr Engineering Company will be
present to lead the discussion.
We ask that you review the enclosed documents prior to Monday's meeting. If you have
questions or concerns, please contact me at 763-593-8099 or through email at
jhogeboom@ci.golden-valley.mn.us. I look forward to our meeting.
Attachments:
- Surface Water Management Plan Update: An Overview Report (13 pages)
- Figure 3-7 (Map): National Wetlands Inventory (1 page)
- Figure 3-8 (Map): Public Ditches and Altered Natural Watercourses (1 page)
- Figure 3-15 (Map): Impaired Waters (1 page)
- Figure 3-16 (Map) Flood Inundation Areas (1 page)
cc: Jeannine Clancy Rick Jacobson Sheila Van Sloun
Eric Eckman Al Lundstrom Lisa Wittman
Mark Grimes Lisa Nesbitt
F
City of Golden Valley
Surface Water Management Plan Update:
An Overview Report
Prepared by Barr Engineering Company
December 127 2007
The City of Golden Valley is updating its Comprehensive Plan. Part of this
update includes the city's Surface Water Management Plan. The following
report provides an overview of the proposed updated plan as of December
2oo7. This overview summarizes highlights and important aspects of the
proposed update and does not include the entire text. The full plan is available
upon request from Al Lundstrom, Environmental Coordinator, for the City of
Golden Valley.
Golden Valley Surface Water Management Plan Overview
December 2007
The City of Golden Valley's Surface Water Management Plan (SWMP) is a local water management plan
prepared in accordance with Minnesota Statute 103B.285 and Minnesota Rules 841o. The purpose of this
SWMP includes those purposes given in Minnesota Statute 103B.201 for metropolitan water management
programs. According to statute, the purposes of these water management programs are to:
• Protect, preserve, and use natural surface and groundwater storage and retention systems;
• Minimize public capital expenditures needed to correct flooding and water quality problems;
Identify and plan for means to effectively protect and improve surface and groundwater quality;
• Establish more uniform local policies and official controls for surface and groundwater
management;
• Prevent erosion of soil into surface water systems;
• Promote groundwater recharge;
• Protect and enhance fish and wildlife habitat and water recreational facilities; and
• Secure the other benefits associated with proper management of surface and ground water.
In short, the purpose of this Plan is to provide a complete and intensive guide and reference for managing
water resources within the City of Golden Valley. The plan will assist the City with policy decisions, water
resource management, implementation priorities, regulatory program references, and capital
improvement budgeting for water resource issues. This plan will replace the 1999 "City of Golden Valley
Surface Water Management Plan" prepared by HR Green & Associates.
This plan will meet the requirements of Minnesota Statutes 103B.235, Minnesota Rules Chapter 8410,
and the watershed organizations with jurisdiction in the City including the Bassett Creek Watershed
Management Commission and Minnehaha Creek Watershed District.
Regulatory History and Background
Besides the purposes and requirements outlined in state statutes and rules, this SWMP reflects numerous
other water resource -related state and federal mandates that the City must meet. As state and federal
laws have changed over the years, the role of the City in water resource management has also changed.
The following paragraphs provide the background and history of some of these mandates (references:
"Minnesota Environment," Minnesota Pollution Control Agency (MPCA), Volume 7, Number 1—Summer
2007, the MPCA's website www Rca.state.mn.us, and the City of Plymouth's July/August 2007 edition of
"Environmental Extra").
In 1945, the Minnesota state legislature authorized a new state Water Pollution Control Commission,
because too many communities were dumping raw sewage into lakes and rivers. One of the Commission's
jobs was to encourage communities to build wastewater treatment plants to stop the flow of raw sewage
into rivers and lakes.
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Three years later, in 1948, the United States (U:S.) Congress enacted the Federal Water Pollution Control
Act (FWPCA), in response to the threat that polluted water posed to the public health and welfare.
In 1967, the Minnesota Legislature created the Minnesota Pollution Control Agency, in response to oil
spills and other major environmental incidents. Its mission was to protect the air, land and waters of the
state.
Five years later, in 1972, the U.S. Congress enacted amendments to the FWPCA to address the growing
public awareness and concern for controlling water pollution. This act became known as the Clean Water
Act (CWA).
Amendments to the CWA in 1977 addressed "point source" facilities, such as municipal sewage plants and
industrial facilities. The National Pollutant Discharge Elimination System (NPDES) became the program
for regulation of point source pollution. As a "delegated permitting authority," the MPCA issues combined
State Disposal System (SDS) and NPDES stormwater permits.
In 1987, the Minnesota legislature enacted laws to control polluted runoff, broadening attention from
"point" source to "nonpoint" source pollution, which is the movement of pollutants from land to water,
typically in stormwater or snowmelt runoff from streets, lawns, construction sites, farms, etc. Also in
1987, state regulatory authority for this program was delegated from the U.S. Environmental Protection
Agency (EPA) to the MPCA.
In 1987, an amendment to the federal Clean Water Act required implementation of a two-phase
comprehensive national program to address stormwater runoff.
In 199o, the EPA promulgated regulations establishing the Phase I Stormwater Program. The Phase I
federal regulations required two general categories of stormwater discharges to be covered under a
NPDES stormwater permit: 11 regulated categories of industrial activity including construction activity
that disturbs five or more acres of land, and municipal separate storm sewer systems (MS4s) serving
populations of 100,000 or more (including Minneapolis and St. Paul).
In 1994 and 1995, the MPCA promulgated rules to establish the Phase I Stormwater Program at the
state level. Under Phase I, Minneapolis and St. Paul obtained individual permits and designed and
implemented stormwater programs.
In 1999, the Phase II federal regulations were promulgated, which expanded the scope of the NPDES
Stormwater Program to include smaller MS4s in urbanized areas, construction activities that disturb
between one and five acres of land, and smaller municipally owned industrial activities. The MPCA then
promulgated rules related to the Phase II federal regulations to fulfill federal NPDES delegation
responsibilities. The rules establish the NPDES stormwater permit requirements for regulated MS4s,
construction, and industrial activities.
In 2003, Phase II of the NPDES program began, Phase II is a broader program that includes smaller
construction sites, municipally owned or operated industrial activity, and many more municipalities
(MS4s). Regulated parties under the Phase II program must develop stormwater pollution prevention
plans to address their stormwater discharges, and determine the appropriate pollution prevention
practices or "best management practices" to minimize pollution for their specific site. Each of the three
permit types—construction, industrial, MS4—has distinct requirements and some regulated parties may
require more than one permit.
In 2003, the MPCA issued a General Permit for municipalities with populations over 1o,000 (MS4
permit), including Golden Valley. The permit requires cities to comply with six "minimum control
measures," which include public education, public outreach, illicit discharge detection and elimination,
Golden Valley SWMP Overview Page 2
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construction site stormwater runoff control, post -construction stormwater management, and pollution
prevention/good housekeeping measures.
Approximately 200 MS4s in Minnesota were mandated by the Phase II federal regulations as requiring
NPDES permit coverage; these include municipalities located within the boundaries of an urbanized area.
In 20o6, the MPCA issued a new MS4 General Permit. The new permit identifies a group of 30 selected
MS4s that must complete a Loading Assessment and a Nondegradation Report as part of their MS4 Storm
Water Permits. These MS4s must assess the volume of total suspended solids (soil, sand and silt),
phosphorus and water in storm water runoff and establish a non -degradation plan to keep pollutant
loadings at 1988 levels. The City of Golden Valley is not part of this "group of 30," although many of the
neighboring cities are part of this group.
The Clean Water Act (CWA) also requires states to adopt water quality standards to protect the nation's
waters. Water quality standards designate beneficial uses for each waterbody and establish criteria that
must be met within the waterbody to maintain the water quality necessary to support its designated
use(s). Section 303(d) of the CWA requires each state to identify and establish priority rankings for
waters that do not meet the water quality standards. The list of impaired waters, sometimes called the
303(d) list, is updated by the states every two years.
In 2002, the MPCA began identifying surface water resources that are impaired for their identified uses
(swimming, aquatic habitat, etc.). As required by the Clean Water Act, if a water body is included on the
impaired waters list, it triggers an analysis called a total maximum daily load (TMDL) study. The TMDL
analysis determines the impaired water body's capacity to assimilate specific pollutants and still meet
water quality standards. A TMDL also develops an allocation scheme amongst the various contributors—
point sources, nonpoint sources and natural background—as well as a margin of safety.
The above regulations and requirements have led to following specific requirements for the City of Golden
Valley and other similar cities:
Preparation of the MS4 General Storm Water Permit Application and Storm Water Pollution
Prevention Program
• Preparation of this Surface Water Management Plan (SWMP)
• Preparation of future updates to the NPDES-MS4 permit and SWMP to address the
requirements of future Total Maximum Daily Loading analyses.
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Summary of Stormwater Issues for the City of Golden Valley
CATEGORY ISSUE
NPDES • Public education & outreach
Stormwater • Public participation
Pollution ♦ Illicit discharge detection and elimination
Prevention • Construction site runoff control
Plan (SWPPP) • Post construction stormwater management
• Pollution prevention/housekeeping
Impaired Waters •
Bassett Creek
•
Sweeney Lake
♦
Wirth Lake
•
Medicine Lake
•
Lake Hiawatha
•
Lake Pepin
•
Other future listed waters
Watershed Minnehaha Creek Watershed District
Organizations ♦
phosphorus removal requirement
•
Wetland protection
•
Identify landlocked basins
Bassett Creek Watershed Management Commission
•
Flood control
•
Lake water quality
•
Stream channel stabilization
•
Wetland protection
•
Erosion control
•
Groundwater protection
•
Water resources education
Metropolitan ♦
Reduction of stormwater volume
Council •
Increase stormwater quality
•
Maximize infiltration
Thermal pollution
•
Wetland management
•
Nondegradation goals
♦
Water quality goals
,ty Issues ♦
Update of city-wide hydrologic modeling
•
Re -development
Interagency cooperation
•
Stormwater system maintenance programming
Wetland inventory and buffers
•
Develop stormwater ordinance
•
Stormwater pond upgrades and sediment removal
•
Private stormwater facility maintenance
•
Bassett Creek stream bank erosion
•
Public ditch maintenance/disposition
Flood protection of homes/land acquisition in flood prone areas
Public education
•
Decola Ponds flooding
•
Inter -community drainage
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CATEGORY
• I-394 Corridor Study
ISSUE
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Plan Organization
The Golden Valley Surface Water Management Plan (SWMP) sets the course for the City's management of
the water resources and stormwater within the City and provides data and other background information,
outlines the applicable regulations, assesses city-wide and specific issues, sets goals and policies for the
City and its resources, and lists implementation tasks to achieve the goals. The SWMP is organized into
six major sections, summarized as follows.
SWMP Section 1.0 Executive Summary
Section i provides information about the City's location and history, and summarizes the highlights of the
SWMP, including the SWMP purpose and scope, goals, policies and implementation tasks.
SWMP Section 2.0 Goals and Policies
Section 2 presents the City's surface water related goals and policies, the regulatory framework, and other
agencies' responsibilities. The goals and policies are presented in their entirety below.
SWMP Section 3.0 Land and Water Resource Inventory
Section 3 provides technical information, maps and tables that describe the surface and subsurface
conditions of the city including land use, public utilities, climate and precipitation, topography, soils,
geology, groundwater, MDNR public waters, wetlands, surface water resource monitoring information,
water body classification, floodplain information, unique features and scenic areas, pollutant sources, and
major basins and overall drainage patterns. The second part of Section 3 presents an inventory of the
major drainage basins in the city, including information about watersheds, watershed area, land use, and
other notable information.
SWMP Section 4.0 Assessment of Problems and Issues
Section 4 assesses city-wide and specific issues and problems, under the following broad topic areas.
Water quality. Under this topic, the SWMP discusses general stormwater runoff quality issues including
nonpoint source runoff and phosphorus loadings, impaired waters and TMDL issues, and many specific
water quality issues.
Flood control. Under this topic, the SWMP discusses general issues and specific flooding and rate issues.
Erosion and sediment control. Under this topic, the SWMP discusses the general causes and impacts of
erosion and sedimentation, specific examples of erosion and sedimentation problems in the City, the
City's implementation and enforcement of its ordinances and approval processes.
Adequacy of existing programs. This section discusses the adequacy of the City's ordinances and official
controls, the BCWMC and MCWD classification systems, the City's education and public involvement
program, maintenance of the City's stormwater system, groundwater protection, and the City's capital
improvement and implementation programs.
SWMP Section 5.0 Implementation Program
Section 5 describes the significant components of the City's SWMP implementation program, including its
NPDES Phase II MS4 permit, operation and maintenance of its stormwater system, education and public
involvement, funding, ordinance implementation and official controls, implementation priorities, and
SWMP update and amendment procedures. The implementation program is presented at the end of
Section 5 in a series of tables. These tables are included in this overview beginning on page 17.
SWMP Section 6.0 References
This section lists the documents and other references used in the preparation of the SWMP.
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Goals and Policies
This section of the Plan describes the objectives and policies for water resource management within the
City of Golden Valley. The City of Golden Valley is proactive in the area of water resource management
reflecting the value the community places on natural resources. The policies described here are designed
to continue to improve the quality and effectiveness of water resource planning and management in the
City of Golden Valley.
Water Quality of Lakes and Streams
Goals:
1. Manage the water resources within the City of Golden Valley, with input
from the public, so that the beneficial uses of wetlands, lakes and streams
remain available to the community. Such uses may include aesthetic
appreciation, wildlife observation, swimming, boating or others.
2. Improve the quality of Bassett Creek and City lakes to enhance the
aesthetic viewing and recreational opportunities in Golden Valley.
3. Protect and enhance fish and wildlife habitat and maintain shoreland
integrity.
4. Meet the current and future phosphorous and other pollutant load
reductions required by the state or watershed management organizations
for the City of Golden Valley (e.g. TMDLs)
5. Manage City lakes such that the more stringent of the following BCWMC
goals or the MPCA impaired waters criteria are met or exceeded:
Water
BCWMC
MPCA
Total Phosphorus
Ch1 -a
Secchi Depth
Body
Quality
Class
(ug/L)
(ug/L)
(m)
BCWMCJ
MPCA
BCWMCJ
MPCA
BCWMCJ
MPCA
Category
Goal
criteria'
Goal
criteria'
Goal
criteria'
Medicine
Level
Deep
38
<40
10
<14
2.2
>1.4
Lake2
Wirth Lake
Level I
Deep
30
<40
10
<14
2.2
>1.4
Twin Lake
Level I
Deep
30
<40
io
<14
2.2
>1.4
Sweeney
Level
Deep
30
<40
10
<14
2.2
>1.4
Lake
Westwood
Level II
Shallow
45
<60
20
<20
1.4
>1.0
Lake
Bassett
Level III
Stream
75
N/A
40
N/A
0.9
N/A
Creek
W. Ring
Level III
N/A
75
N/A
40
N/A
0.9
N/A
Pond
E. Ring
Level III
N/A
75
N/A
40
N/A
0.9
N/A
Pond
Courtlawn
Level III
N/A
75
N/A
40
N/A
0.9
N/A
Pond
South Rice
Level III
N/A
75
N/A
40
N/A
0.9
N/A
Pond
i —From the Minnesota Proposed Rules Chapter 7o5o (MPCA, July 16, 2007)
2 - Medicine Lake is located outside of the Golden Valley but a portion of the City is tributary to Medicine Lake.
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Policies:
(a) The City of Golden Valley will develop objectives and guidelines to evaluate and protect
the natural aesthetics and attractiveness of lakes, ponds and adjacent uplands.
(b) The City of Golden Valley will manage lakes and streams to meet or exceed the BCWMC
water quality goals and to exceed MPCA impaired waters criteria.
(c) The City of Golden Valley will work with the BCWMC to implement the improvement
options listed in the BCWMC's capital improvement program based on feasibility,
prioritization, and available funding.
(d) The City of Golden Valley will give higher priority to water quality improvement
projects, including nonstructural measures and education, which are the most effective
at achieving water quality goals.
(e) The City of Golden Valley will cooperate with the BCWMC, MCWD, the MPCA and
other stakeholders in the preparation and implementation of TMDL studies for water
bodies in the city, or water bodies that receive water from the city, that are on the
MPCA's current or future impaired waters (303(d)) list.
(f) The City of Golden Valley will continue to identify opportunities to maintain or improve
the excellent water quality in Twin Lake.
(g) The City will develop a water quality model toward quantifying and implementing
BMPs that will reduce phosphorus loading to receiving waters within the MCWD by
two pounds per year.
(h) The city will develop a program to deal with tracking, inspecting and monitoring private
stormwater facilities.
(i) The City of Golden Valley will continue to work with the League of Minnesota Cities
Stormwater Coalition toward identifying and addressing issues.
(j) The City of Golden Valley will continue to support the water quality monitoring efforts
in the City undertaken by other agencies and organizations.
Water Quality of Stormwater Runoff
Goals:
1. Improve the quality of stormwater runoff by reducing non -point source
pollution including nutrients and sediment carried as stormwater runoff.
2. Maintain the nutrient and sediment removal efficiency of several key
stormwater ponds throughout the City thereby, improving the water
quality of the receiving waters.
3. To meet or exceed all applicable water related regulations as promulgated
by the Federal Government, the State of Minnesota, Hennepin County, the
Bassett Creek Watershed Management Commission (BCWMC), the
Minnehaha Creek Watershed District (MCWD) and the Metropolitan
Council.
Policies:
(a) The City will implement all aspects of the Golden Valley NPDES Phase II MS4
permit SWPPP.
(b) The City will require all regulated stormwater from new development projects to be
treated to the BCWMC's Level I standards. For projects that fall within the city
designated redevelopment areas, and that result in increased impervious surface, the
City will require all regulated stormwater to be treated to meet the BCWMC's non -
degradation standard (no increase in phosphorus load). See the BCWMC Watershed
Management Plan, Section 4.2.2.4 "Policies Relating to Administration of BCWMC
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Water Quality Management Standards, Policy A." Exemptions to the nondegradation
policy as approved by the BCWMC at their January 18, 2007 meeting include:
• Single family home sites
• Project sites less than 0.5 ac
• Third exemption that varies by project size, as shown in table below:
Project Site Size
(acres)
Exemption Applies if Added
Impervious Area is no more than:
0.5-1.0
1,000 square feet
1.0-5.0
2,000 square feet
Over 5.0
io,000 square feet
(c) The City will continue forwarding proposed projects to the BCWMC for review. The
types of projects that must be submitted to the BCWMC for review, the BCWMC's
review procedure, submittal requirements, guidelines, design criteria, etc. are provided
in the BCWMC's document Requirements for Improvements and Development
Proposals (BCWMC, November 1998, as revised).
(d) The City shall require developers to meet all BCWMC requirements, where applicable,
and to consider/evaluate the use of BMPs in the Requirements for Improvements and
Development Proposals (1998 as updated, Appendix F).
(e) The City shall require developers to meet all MCWD requirements, where applicable.
(f) As part of the City's development review and approval process, the City will continue to
ensure that storm water discharges will not adversely affect endangered species,
threatened species, historic places, and archaeological sites.
(g) The City will continue its sediment removal program for treatment and key ponding
locations.
(h) The City will continue its program for removing sediment from the existing storm sewer
system.
(i) The City will continue to explore implementation of emerging technologies, BMPs, and
methods as research develops.
(j) The City will conduct a city-wide review of opportunities for BMP implementation and
develop a program for construction of BMPs as funds become available.
(k) The City will continue to require maintenance agreements for private water quality .
facilities and develop procedures and resources to enforce these agreements.
(1) The City will coordinate with other cities and agencies to encourage ongoing
maintenance of water quality facilities.
(m) The City will continue implementation of its pond bank stabilization program.
(n) The City will construct regional detention/nutrient removal basins as opportunities
arise.
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(o) The City will increase public awareness of individual property owner's impacts on water
quality.
(p) The City will develop and implement a stormwater management ordinance.
(q) The City will encourage using vegetation to assimilate nutrients for stormwater runoff.
(r) The City will install sediment catching/environmental manholes where appropriate and
feasible.
(s) The City will implement Guiding Principle 8 of the I-394 Corridor Study encouraging
the application of green building and infrastructure techniques such as Low Impact
Development practices including green roofs, rain gardens, bioswales, and pervious
pavement for the I-394 Corridor.
(t) The City will continue a targeted street sweeping and catch basin cleaning program.
(u) The City will request MnDOT involvement in pond sediment removal within MnDOT
right-of-way.
(v) The City will continue to participate in and support the League of Minnesota Cities
Stormwater Coalition.
Goal:
Improve the pollutant removal effectiveness of stormwater ponds within the
city.
Policies:
(a) The City will continue implementation of its stormwater pond functional improvement
program including sediment removal and BMP identification to enhance the pollutant
removal effectiveness of existing stormwater ponds.
(b) The City will fund this program systematically to complete the individual projects.
Illicit Discharge, Detection and Elimination
Goal:
Eliminate illicit discharge to the City's storm sewers and receiving waters.
Policies:
(a) The City will continue to update a storm sewer system map that shows the location of
significant storm sewer system components and receiving water bodies. The storm sewer
map will help facilitate management of illicit discharge detection and elimination.
(b) The City will continue to update its Creek Inventory, which identifies outfalls, culverts,
significant erosion sites and potential obstructions in the three branches of Bassett Creek
within city limits.
(c) The City will develop an ordinance or other regulatory mechanism prohibiting illicit
discharges to the city's storm sewer system and implement appropriate enforcement
procedures and actions.
(d) The City will develop a program to detect and address illicit connections to its storm
drainage systems and receiving waters.
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(e) The City will submit an annual stormwater system inspection report and retain all
required records for at least three (3) years beyond the term of the NPDES MS4 permit,
including dates of inspection and responses to the inspections, and the date of completion
of repairs and major additional protection measures.
(f) The City will develop a program to prohibit illegal dumping and the disposal of waste in
prohibited areas, such as backyards, stream banks, or other areas.
(g) The City will develop a plan to inform public employees, businesses, and the general
public of water quality hazards associated with illicit discharges and improper disposal of
waste.
Streams
Goals:
1. Maintain or enhance the natural beauty and wildlife habitat value of Bassett
Creek through the City of Golden Valley.
2. Implement stream restoration measures whenever necessary to maintain
health, safety, and welfare.
3. Minimize the volume of stormwater runoff entering Bassett Creek.
4. Increase the groundwater base flow of Bassett Creek.
5. Reduce the frequency of bank full runoff events in Bassett Creek.
6. Maintain the nutrient and sediment removal efficiency of key stormwater
ponds throughout the City.
Policies:
(a) The City of Golden Valley will support opportunities to enhance recreational
opportunities on Bassett Creek.
(b) The City will reduce areas of impervious surface through the consideration of changes to
the City ordinances and policies and encourage the use of innovative materials to reduce
impervious surface and enhance infiltration.
(c) The City will encourage restoration of stream and streambank areas where the natural
beauty of the creek has been compromised.
(d) The City will implement a streambank stabilization program using bioengineering and
natural products, whenever possible.
(e) The City of Golden Valley will work to support legislation that eliminates the currently
required cumbersome public ditch proce§s to maintain and abandon public ditches.
Flood Control
Goals:
i. Reduce flooding along Bassett Creek.
2. Protect the public from flooding through measures that ensure public safety
and prevent inundation of occupied structures.
3. Regulate stormwater runoff discharges and volumes to minimize flood
problems, flood damages and the future costs of stormwater management
systems.
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Policies:
(a) The City will continue to implement its Flood Plain Management Zoning Regulations
(City Code Section ii.6o) and keep it current with BCWMC and MCWD Policies.
(b) The City will continue its maintenance and sediment removal program to provide
clean sewers with maximum capacity for storm flow conveyance.
(c) The City will permanently protect stormwater ponds and drainage systems by
obtaining property land dedication and easements with new development.
(d) The City will design its municipal stormwater system to convey no less than the io%
probability/io-year flood event.
(e) The City will maintain and inspect emergency stormwater pond overflow routes and
identify critical maintenance areas.
(f) The City will continue to update the City's storm sewer map.
(g) The City will implement the BCWMC's development policies.
(h) The City will continue forwarding proposed projects to the BCWMC for review. The
types of projects that must be submitted to the BCWMC for review, the BCWMC's
review procedure, submittal requirements, guidelines, design criteria, etc. are
provided in the BCWMC's document Requirements for Improvements and
Development Proposals (BCWMC, November 1998, as revised).
(i) The City will require project proposers to apply best management practices to reduce
the volume of stormwater runoff, to the maximum practical extent. Examples of
stormwater runoff volume reduction methods include:
♦ Minimizing the amount of planned impervious surface as areas develop.
Minimizing the amount of impervious surface during redevelopment.
• Promoting infiltration.
(j) The City will require that post -development peak discharge rates shall not exceed
existing discharge rates for the 2 -year (5o% probability), 10 -year (1o% probability),
and loo -year (1% probability) critical duration storm events. The City will also
require rate control in conformance with the BCWMC flood control project system
design.
(k) The City will enforce all aspects of the City of Golden Valley Flood Plain Management
Zoning Overlay District Ordinance (City Code Section 11.6o).
(1) The City will allow only those land uses in the BCWMC-established floodplain that
will not be damaged by floodwaters and will not increase flooding. Allowable types of
land use that are consistent with the floodplain include:
♦ Recreation or open space areas such as golf courses, tennis courts, driving
ranges, archery ranges, picnic grounds, boat launching ramps, swimming
areas, parks, wildlife habitat, trails, nature preserves and fishing areas.
Parking areas and heliports.
Public utility lines.
♦ Agriculture and other open spaces.
Residential lawns, gardens, parking areas, and play areas.
Signs and signals delineating or accessory to parks, trails and other permitted
uses as described in City Code Section 11.6o.
(m) The City will not allow permanent bridges, docks, storage piles, fences and other
obstructions in the floodplain that would collect debris or restrict flood flows. Any
artificial obstruction of the beds, banks, waters or channels of Bassett Creek or the
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Floodplain made subsequent to February 3, 1981 and without first obtaining a special
permit or variance therefore shall be removed by the owner of the adjoining land
within 10 days after mailing to such owner of a demand to do so by the
Administrator. If the owner shall fail or refuse to remove the obstruction, within said
time, or if the owner cannot be found or determined, the City may remove such
obstruction and the cost thereof shall be paid by the owner on demand, or may be
assessed against the land, and collected in the same manner as prescribed by law for
levying and collecting special assessments for municipal improvements.
(n) The City will generally not allow filling within the BCWMC-established floodplain.
Proposals to fill within the BCWMC-established floodplain must obtain BCWMC
approval and must provide compensating storage and/or channel modification so
that the flood level shall not be increased at any point along the trunk system due to
the fill.
(o) The City will prohibit expansion of existing non -conforming land uses within the
floodplain unless they are fully flood -proofed in accordance with existing codes and
regulations.
(p) As opportunities arise, the City will consider dedicating funds to the purchase of
homes that have less than 1 foot of freeboard from their lowest opening to the
established loo year flood level, or that have an access that has a portion below the
loo year flood level.
(q) The City will require that lowest floors of new permanent structures be at least 2 feet
above the established loo -year flood plain elevation.
(r) The City will not build, or allow to be built, streets within the established loo -year
flood plain.
Erosion and Sediment Control
Goals:
i. Prevent erosion and sedimentation to the greatest extent possible to protect
the City's water resources from increased sediment loading and associated
water quality problems.
2. Implement soil protection and sedimentation controls whenever necessary
to maintain health, safety, and welfare.
3. Reduce erosion from single family home construction and landscaping sites.
Policies:
(a) The City will encourage land use planning and development that minimizes sediment
yield, through compliance with established City, BCWMC and MCWD policies.
(b) The City will review projects and developments for compliance with the City, MPCA,
BCWMC, and MCWD erosion and sediment control standards.
(c) The City will require development to comply with and follow appropriate best
management practices for erosion and sediment control as specified in the Minnesota
Stormwater Manual (2005), as may be amended.
(d) The City will continue to require permits and the preparation of erosion control plans for
construction projects as per Golden Valley City Code Section 4.31. Erosion control plans
shall show proposed methods of retaining waterborne sediments onsite during the
construction period, and shall specify methods and schedules for restoring, covering, or
re -vegetation of the site after construction.
(e) The City will review its existing Grading, Drainage, and Erosion Control Ordinance for
content and examine the effectiveness of enforcement efforts.
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(f) The City will implement a program to control construction site debris storage and waste
disposal. The city will analyze how to inspect and enforce proper construction site waste
management.
(g) The City will continue to perform regular erosion and sediment control inspections with
coordination/cooperation with the BCWMC as appropriate.
(h) The City will maintain a process for handling public complaints regarding non-
compliance issues.
(i) The City will maintain a record-keeping process to store information regarding site
inspection.
(j) The City will continue its existing inspection programs and maintain an inspection log,
elements to consider, follow-up procedures, and schedule guidelines for staff.
Goal:
Remove sediment from catch basins before the sediment travels to water
resources within the City.
Policies:
(k) The City will continue to clean sump and problem catch basins in the spring and fall, and
more frequently where needed.
(1) The City will continue to perform targeted street sweeping.
(m) The City will continue to explore implementation of emerging technologies, BMPs, and
methods as research develops.
Goal:
Improve erosion and sediment control through aesthetically pleasing and
environmentally friendly means.
Policies:
(n) The City will continue to develop buffers of native and naturally existing shoreline
vegetation on City property.
(o) The City will encourage and support the development of buffers of native and naturally
existing shoreline vegetation on non -City property.
(p) The City will continue to implement its tree preservation ordinance (City Code
Section 4.3.2)•
(q) The City will consider the development of aesthetically pleasing new ponds in locations
where feasible and appropriate.
Wetlands and Natural Resources
Goals:
1. Protect and restore wetlands to improve or maintain their functions and
values in accordance with the Minnesota Wetland Conservation Act.
2. Protect and restore natural areas.
Policies:
(a) The City will continue its role as the local governmental unit (LGU) for the Minnesota
Wetland Conservation Act (WCA).
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(b) The City will develop a wetland management plan that consolidates and updates existing
inventories, classifications, and wetland assessments. This plan will outline strategies
(including buffers) to improve and protect wetlands.
(c) The City will develop an ordinance to implement the above wetland management plan
that is also consistent with the requirements of the WCA, and BCWMC and MCWD
Policies.
(d) While the wetland management plan is under development, the City will continue to
require wetland delineation with development proposals, as needed, and maximize buffer
zones around wetlands where possible.
(e) The City will continue to develop wetland banking credits within its wetland bank as
opportunities arise.
(f) All developed wetland credits will be used for City of Golden Valley projects.
(g) The City will continue to coordinate with other agencies that are also involved in the
protection of wetlands.
(h) The City will continue to use its Natural Resource Inventory as a planning resource and
update it on a regular basis.
Recreation, Habitat, and Shoreland Management
Goal:
Improve the quality of Bassett Creek and City lakes to enhance the aesthetics
and recreation opportunities in Golden Valley.
Policies:
(a) The City will support opportunities to enhance recreational opportunities on Bassett
Creek.
(b) The City will develop objectives and guidelines to evaluate and protect the natural
aesthetics and attractiveness of lakes, ponds and adjacent uplands.
(c) The City will maintain control and responsibility for shoreland regulation by continuing
implementation of its shoreland ordinance (City Zoning Code Section 11.65).
(d) The City will promote and encourage protection of non -disturbed shoreland areas and
restoration of disturbed shorelines and streambanks to their natural state where feasible.
(e) The City will encourage preservation of streambank and lakeshore vegetation during and
after construction projects.
(f) The City will create a comprehensive city-wide set of buffer standards for all city water
bodies and adopt an ordinance implementing the standards.
Groundwater
Goal:
Protect the quantity and quality of groundwater resources.
Policies:
(a) The City will cooperate with St. Louis Park, Robbinsdale, Plymouth, and Minnetonka
regarding wellhead protection activities and these adjacent cities' wellhead protection
programs.
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(b) The City will coordinate with the Minnesota Department of Health to determine if the
City has areas within a source water protection area for surface water intakes and assist in
addressing impacts if needed.
(c) The City will encourage groundwater recharge and protect recharge areas from potential
sources of contamination. The City will promote groundwater recharge through
infiltration of stormwater runoff. The City will use available information and guidance
(e.g., Minnesota Department of Health guidance) to evaluate the potential impacts of
stormwater infiltration BMPs on groundwater.
(d) The City will cooperate with efforts to educate the general public concerning the
importance of and the use of BMPs to prevent contamination of groundwater supplies.
Funding
Goal:
Provide sufficient funding to implement measures and policies contained in this
plan.
Policy:
(a) The City of Golden Valley will continue to use the Storm Water Utility Fee program to
fund stormwater related activities. The Storm Water Utility Fee is the primary funding
source for all stormwater improvements related to the City's Surface Water Management
Plan, Pavement Management Program and NPDES Phase II MS4 requirements.
(b) The City will continue to seek funding for stormwater related programs and projects from
other sources including but not limited to: the Bassett Creek Watershed Management
Commission, the Minnesota Department of Natural Resources, the Minnesota
Department of Transportation, and the Minnesota Board of Water and Soil Resources.
(c) The City will consider dedicating funds to the purchase of homes that have 1 foot or less
freeboard to their lowest opening above the loo year flood, or that have access that has a
portion below the ioo year flood level, as they become available.
Education and Public Involvement
Goal:
Involve and educate the residents of the City in water resource related issues.
Policies:
(a) The City will maintain a public education program to distribute educational materials to
the community or conduct equivalent outreach activities about the impacts of stormwater
discharges on water bodies and the steps that the public can take to reduce pollutants in
stormwater runoff.
(b) The City will maintain the Golden Valley Environmental Commission to educate
residents, raise awareness about environmental responsibility, and create a sense of
collaboration in the spirit of making and keeping Golden Valley an environmentally
healthy city.
(c) The City of Golden Valley will continue to conduct an annual public meeting (with notice)
to discuss its Storm Water Pollution Prevention Plan (SWPPP) and inform the public
about stormwater impacts. City staff will analyze comments and written materials
gathered at the public meeting and adjust the SWPPP where appropriate.
(d) The City of Golden Valley will continue to provide support where appropriate, for the
development and distribution of educational materials and assist other agencies efforts.
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(e) The City will continue to utilize volunteer groups to the greatest extent possible for public
service projects such as catch basin stenciling, debris clean up, stream bank erosion
protection, buckthorn removal, and vegetative buffer strips.
(f) The City will continue to inform public employees, businesses, and the general public of
the water quality hazards associated with illicit discharges and improper disposal of
waste.
(g) The City will continue the use of demonstration projects as a means of educating the
public on issues such as stream bank stabilization and aesthetically pleasing stormwater
ponds.
(h) The City will continue to work with other agencies to develop an education program for
schools in the City.
(i) The City will continue to provide educational and informational materials regarding
stormwater issues on the City's website (www.ci.golden-valley.mn.us) and cable TV
station.
(j) The City will continue to provide informational packets to new residents containing
stormwater related information.
(k) The City will continue to provide a bi-monthly newsletter to its residents with at least one
page dedicated to water and environmental issues.
(1) The City will establish programs to monitor storm drains for illicit discharge and stencil
markings on storm inlets with assistance from public interest groups.
Implementation
Section 5 describes the significant components of the City's SWMP implementation program, including its
NPDES Phase II MS4 permit, operation and maintenance of its stormwater system, capital improvement
projects, studies, education and public involvement, funding, ordinance implementation and official
controls, implementation priorities, and SWMP update and amendment procedures.
The City's current ordinances, official controls and future needs are described in Section 4.6.1 of the
SWMP. Some of the City's ordinances and official controls are tied with the City's implementation of its
NPDES Phase II MS4 permit. The City's ordinance implementation is incorporated into Part C (official
controls) of the implementation program tables below.
In order to improve the City's efficacy regarding stormwater management the City will pursue three new
additional controls upon the adoption of this plan as follows:
1. Stormwater management ordinance. This new stormwater ordinance will deal with design
requirements relating to the water quality aspects of ponding and other treatment devices and
methods, along with water quantity requirements such as rate and volume controls. This
ordinance will codify the stormwater design requirements of the BCWMC, Met Council, the City's
NPDES permit, and the City's own policies. The stormwater ordinance will also outline process
and the roles of other agencies. This ordinance will also address illicit discharges and new
connections.
2. Wetland management plan and wetland management ordinance. To fill in gaps in the City's
wetland management program, the City will develop a wetland management plan that
consolidates and updates existing inventories, classifications, and wetland assessments. This plan
will also outline strategies (including buffers) to improve/protect those wetlands. Recognizing
the mostly developed character of the city, the wetland management plan would provide a ready
basis for the City to take advantage of future opportunities arising from re -development, grant
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funding, public involvement, or other circumstances. It would also provide the basis for
development of buffer standards.
Buffer Ordinance to cover wetlands, lakes and streams. A buffer ordinance based on the wetland
plan and on analysis of buffer utility for lakes and streams would then follow the development of
the wetland plan and ordinance.
The implementation program is summarized in a series of tables on the following pages of this overview,
and at the end of Section 5 of the SWMP. Table 5-1 presents the details of the implementation program,
including a project description, cost estimate, potential funding sources, and proposed years of
implementation. Table 5-2 summarizes the implementation program year -by -year, listing the project
number and estimated costs for every year from 2007-2016.
Table 5-1 and Table 5-2 are each split into five parts:
Part A—Capital improvement projects
Part B— Studies
Part C— Official Controls
Part D— Operation and maintenance programs
Part E—Public education, outreach, participation, and involvement
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Table 5-1. Water Resources Implementation Program—City of Golden Valley
Part A. Canital Imorovement Proiects
Project
Cost
Potential Funding
Proposed Year(s)
Number
Project Description
Estimate*
Sources
of Implementation
SS -1
Residential Storm Sewer
$4,800,000
Storm Sewer Utility
2008-2012
SS -C
Improvements
$20,000
Fund
2012
SS -18
Storm Water Ponds
$500,000
Storm Sewer Utility
2009
SS -D
Wetland inventory and assessment
$70,000
Fund
2008-2009
SS -A
Golden Valley Drive Storm Sewer
$75,000
Storm Sewer Utility
2008
SS -E
Update/revise Citywide Hydrologic
$85,000
Fund
2008-2009
SS -13
Streambank Stabilization
$1,595,000
Storm Sewer Utility
2008-2012
SS -F
Buffer study
$15,000
Fund (95,000)
2009
BCWMC (1,500,000)
..Cost estimates are based on 2007 dollars, do not account for inflation, and are for planning purposes only.
Table 5-1. Water Resources Implementation Program—City of Golden Valley
Part B. Studies
Cost estimates are based on 2007 dollars, do not account for inflation, and are for planning purposes only.
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Potential
Proposed Year(s)
Project
Cost
Funding
of
Number
Project Description
Estimate
Sources
Implementation
SS -C
General Mills JFB Storm/Wetland
$20,000
Storm Sewer
2012
Feasibility
Utility Fund
SS -D
Wetland inventory and assessment
$70,000
Storm Sewer
2008-2009
Utility Fund
SS -E
Update/revise Citywide Hydrologic
$85,000
Storm Sewer
2008-2009
Model
Utility Fund
SS -F
Buffer study
$15,000
Storm Sewer
2009
Utility Fund
SS -G
Decola Ponds study
$25,000
Storm Sewer
2010
Utility Fund
SS -L
Loading Model for MCWD portion of
$2,000
Storm Sewer
2008
City
Utility Fund
SS -M
City-wide Water Quality BMP
$5,600
Storm Sewer
2008
Implementation Study
Utility Fund
SS -N
Develop Load Reduction from BMP
$30,000
Storm Sewer
2010
Implementation Model
Utility Fund-.-
und.SS-O
SS-0
Annual update of Load Reduction
$10,000
Storm Sewer
2011-2017
from BMP Implementation Model
Utility Fund
Cost estimates are based on 2007 dollars, do not account for inflation, and are for planning purposes only.
Golden Valley SWMP Overview Page 19
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DRAFT
FIGURE 3-7
I r«sw ` ` "" PUBLIC WATERS
P _ INVENTORY (PWI) AND
��_ 2T630P NATIONAL WETLANDS
,sa 1 INVENTORY (NWI)
�° 1-
ULUTH ST GOLD Fl 4LLE't
! n n NWI
27-761w`� P Wetlands/Lakes
F7WI MDNR PWI ID #: 27-X)OCP/W
Lake (P)
27.766.r6 -� Wetland (W)
6
27706w'1`1} I ,#27-711.P, neieP �� ' Stream
�� Drainage District
Bassett Creek
I 27-1149 w
5527-36 v i
Medicine Lake
55 y. i
zasTv� i Minnehaha Creek
i
Sweeney Lake
Municipal Boundary
27-709 w I
169 'o 1 i Roads
L, Railroad
100
_ i.-
-.aX� � 27-T1,P Date:November 29, 2007
r r^i Sources:
{ 27;632 P ( l g - Bert Engineering Company for PWI - streams (based on
_ _ I (`• 5 , _ MN -DNR PWI hardcopy maps) and watershed boundaries.
MN -DNR for PWI lakes and wetlands, railroad, and lakes
Y v of Dins roue --3 _ outside of Golden Valley.
MN -DOT for roads outside of Golden Valley.
27.711 P {/ I ;' - City of Golden Valley for all other layers.
0.5 0.25 0 0.
City of Golden Valley ]t! !fN
Wes
7600 Golden Valley Road �'
2779P A
Golden Valley, MN 55427-4588 27-710 F .R �„^���•�'„�.k. r+---+—'''" -
www.c1.9olden-valley.mn.us
27a9'P,
n
i I
I I
1 oie 11e
I
I 100 County Ditch 18 I k
- - ' DRAFT
FIGURE 3-8
PUBLIC DITCHES &
ALTERED NATURAL
WATERCOURSES
169 C, r j I I
I L r coLo t•muer PUbIIC Ditches
ULUTH ST
Altered Natural Watercourse
J j Drainage District
-
I°moi D _ Bassett Creek
Medicine Lake
p. County Ditch 23, I v f' ;`r ° T
County Ditch 25, Minnehaha Creek
° 1 County Ditch 30
l Sweeney Lake
Municipal Boundary
Roads
55
Railroad
wren
Lak, Lakes &Ponds
r) Stream
6 l
� -� � � Ditch/Drainage Way
100
o -- - -
Date: November 29, 2007
Sources:
Judicial Ditch E i I -Bam Engineering Company for watershed boundaries.
BC wMC for Public Oifches-
a
- MN -DOT for roads outside of Golden Valley.
west—o<l_
•� - -- _-_ • MN -DNR for railroad and lakes outside of Golden Valley.
Lake ` .i,v . �, J
` — •� '� � _--��--- - City of Golden Valley for ell other layers.
t
City of Golden Valley �• 0.5 0.25 0 0 Miles N
7800 Golden Valley Road r -- 1 A
Golden Valley, MN 55427-4588 ! - •• _
www.ci.golden-valley.mn.us s'- ---
E
Q
r-�
jroe
I 100 4
i
' l ; DRAFT
FIGURE 3-15
_ W
� � IMPAIRED WATERS
108 5 - ', Impaired Streams
n� �, �,�a
ULUTH .^iT Bassett Creek GOLn n VALLEY Impaired Water Body
� Impairments: Lull, i � �><.
�I
—I - Fish IBI • • I cuf
- Fecal Colfform l II��t,}Drainage DISfC/Cf
V �aSweeney Lake ;
J- impairments:_ Bassett Creek
r Excess Nutrients
rL y t,
w � I Medicine Lake
CG��� e-� 1��
- I / DD Minnehaha Creek
Sweeney Lake
.i 000
---
-.= Municipal Boundary
Roads
— ) --^ Railroad
55 55 '
lL I
I tel,
Lakes &Ponds
` Wirth Lake I
Impairments: Stream
Excess Nutrients I i
(r Mercury FCA
i Ditch/Drainage Way
LJ
1 Irl p ----
- - `1 100 n _
C Date: November 29, 2007
- � Sources:
Ben Engineering Company for watershed boundanes.
T - MPCA for Impaired Water Bodies (2008(draR)).
:Vnstwcnn .` _ `_ — _ — �j _� - MN -DOT for roads outside o1 Golden Valley.
.. .. Lake f0i
MN -DNR (or railroad end lekes outside a1 Golden Valley
City of Golden Valley for all other layers.
♦ 1jt'"1/ 0.5 0.25 0 0.5 N
City of Golden Valley - Miles
7800 Golden Valley Road
Golden Valley, NIN 55427-4588
—A.goklen-valley.mn.us -
1614 121AA =41
lil
Lake
City of Golden Valley
7800 Golden Volley Road
Golden Valley, MN 55427-4588
v .d.golden-valley.mn.us
i.
9ee,
I
55
L ~ I
10011
1 r a Date: November 29, 2007
` Sources:
_ - Ben Engineering Company for Brack LOMR Final Mapping (2007).
- Hennepin County for Preliminary FIS Mapping (2006).
- BC WMC for Flood Storage Areas.
-City of Golden Valley for all other layers.
0.25 0 0.5 N
Nil-
?O'WMIICY
DRAFT
FIGURE 3-16
FLOOD INUNDATION
AREAS
FIS Preliminary 100 -Yr Floodplain
Drainage District
Bassett Creek
Medicine Lake
Minnehaha Creek
Sweeney Lake
--- —i Municipal Boundary
Roads
--� Railroad
Lakes & Ponds
Stream
Ditch/Drainage Way