6. Surface Water 6 Surface Water
Local Water Management Plan
EXECUTIVE SUMMARY,WATER RESOURCE MANAGEMENT RELATED
AGREEMENTS, AND AMENDMENT PROCESS
Local water management plans are required to include an executive summary that summarizes
the highlights of the local water management plan, a summary of the water resource management
related agreements that have been entered into by the local community, and a section must define
the process by which amendments may be made.
GMinimum Requirements:
• Provide an executive summary that includes the highlights of the local water management
plan.
• Describe the water resource management related agreements that have been entered into
by your community. This includes joint powers agreements related to water management
that the community may be a party to between itself and watershed management
organization(s), adjoining communities, or private parties.
• Include a section on amendment procedures that defines the process by which
amendments may be made. The amendment procedure must be consistent with the
amendment procedures in the watershed organization(s)plans that affect your
community.
PHYSICAL ENVIRONMENT AND LAND USE
Local water management plans are required to include a description of the existing and proposed
physical environment and land use. Knowing the existing conditions in your community helps to
better address the issues that need to be addressed.
G✓ Minimum Requirements:
• Describe the existing physical environment and existing land use. You may be able to
incorporate data by reference if allowed by the appropriate watershed organization(s)
plan. You should be aware that not all watershed plans contain the level of detail needed
and in those cases, you will be required to provide this information directly in your local
water management plan.
• Describe the proposed physical environment and future land use.
• Include a map and/or description of drainage areas that includes path and flow directions
of the stormwater runoff in your community.
• Describe the volumes and rates of flow for those defined drainage areas.
EXISTING AND POTENTIAL WATER RESOURCE-RELATED PROBLEMS
Page 2 of Section 6
Part of planning for appropriate local water management is to assess the water resource-related
issues in your community,both those that already exist and those that are likely to occur given
changes in development or other foreseeable changes. Assessing these issues helps your
community to better understand how to prevent or address those issues. Your local water
management plan needs to include an assessment of both existing and potential water resource-
related problems in your community
Elf Minimum Requirements:
• Include an assessment of the existing water resource related problems in your
community.
• Include an assessment of the potential water resource related problems in your
community.
• Include a list or map of impaired waters within your community as shown on the most
current 303d impaired waters list
LOCAL IMPLEMENTATION PLAN/PROGRAM
Your local implementation program or plan must detail the nonstructural,programmatic and
structural solutions to the problems identified in the assessment of existing or potential water
resource related problems section, and prioritize those solutions. Your implementation program
must be consistent with and not jeopardize achievements of any of the goals of the watershed
organization(s)within which your community lies. In addition, all local official controls
identified in this implementation program must be enacted within six months of approval of the
local water plan by the appropriate watershed organization(s).
GMinimum Requirements:
• Include prioritized nonstructural,programmatic, and structural solutions to identified
problems.
• Describe the areas and elevations for stormwater storage adequate to meet performance
standards or official controls in watershed organization(s)plan.
• Define the water quality protection methods that would be adequate to meet performance
standards or official controls.
• Clearly define the roles and responsibilities of the community from that of the WMO(s)
for carrying out implementation components.
• Describe the official controls and any changes needed to official controls.
• Include a table briefly describing each component of the implementation program that
clearly details the schedule, estimated cost, and funding sources for each component,
including annual budget totals.
• Include a table describing the capital improvement program that sets forth by year, details
of each contemplated capital improvement that includes the schedule, estimated cost, and
funding source.
EXECUTIVE SUMMARY
• We have an agreement with the Carver County WMO to provide education and outreach
materials and programming.
• We have an agreement with Carver County SWCD to provide construction site
inspections for erosion prevention and sediment control
PHYSICAL LAND USE
• This will need to be updated to reflect land development over the last decade.
• The hydroCAD model was updated in 2015 but will require continuous updating.
• The storm sewer system is mapped. There are some gaps that need to be addressed and
this also requires continuous updating as land develops or old systems are replaced.
EXISTING AND POTENTIAL WATER RESOURCE-RELATED PROBLEMS
• The city has worked with the RPBCWD to develop numerous studies that can be used to
assess issues such as nutrient and sediment loading to lakes and streams
o Bluff Creek Total Maximum Daily Load Implementation Plan—Identified land
development and the addition of hardcover as the primary contributor to near and
in stream scour which is the source of sediment.
o Lake Lucy and Lake Aim Use Attainability Assessment(UAA)—looked at
contributing watersheds and identified those most likely to contribute nutrient
loading into the two lakes. The UAA also looked at internal loading.
o Lake Susan Use Attainability Assessment(UAA)—looked at looked at
contributing watersheds and identified those most likely to contribute nutrient
loading into the two lakes. The UAA also looked at internal loading.
o Draft Lotus Lake UAA - looked at looked at contributing watersheds and
identified those most likely to contribute nutrient loading into the two lakes. The
UAA also looked at internal loading.
o Susan, Ann, Lucy Subwatershed Assessments (SALSA)—also looked at pollutant
loading from the contributing subwatersheds.
o There are several TMDL studies currently underway. The Riley Creek Chain of
Lakes study and the Purgatory Creek Chain of Lakes study.
o We have compiled a list of deficient infrastructure as noted in several flood events
—ex. Fall of 2006, August of 2014, et al
o Will need to update the Federal Clean Water Act, section 303d list of impaired
waters. This will need to be regularly reviewed and updated.
o Riley Purgatory Bluff Creek Watershed District worked jointly with the Cities of
Chanhassen, Eden Prairie, Bloomington and Minnetonka to update the 100 year
flood elevations and the annual flood occurrence probability map based upon
Atlas 14 climate data.
LOCAL IMPLEMENTATION PLAN/PROGRAM
• This will need to be developed based upon the above mentioned studies, the
implementation programs for the various watershed districts, and the city's capital plan
for road improvements.
• A ten year CIP will need to be developed.
• The city will continue to work with Ehlers or another similar entity to determine the
SWMP fund revenues and tolerable expenditures.
• The city will need to complete the amendment of the following code sections:
o Storm water management
o Wetland protection
o Shoreland protection
• The city will need to identify in code what responsibilities they will assume and which
they will defer to the various watershed organizations.
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