Comp Plan 2020 Public Input Summary
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Transcript of Comp Plan 2020 Public Input Summary
Water Resources Assessment & Issues
September 16, 2010
Coon Creek Watershed District
Purpose Tonight
1. Bring you up to date2. Brief you on what we’ve learned3. Seek input
Agenda1. Intro to CCWD
2. Water Resource Assessment
3. Issues
4. Needs
Coon Creek Watershed 92 sq mi. (58,880 acres)270 miles of open channel363 miles of pipe16,800 acres of lake & wetland
Mission StatementTo manage groundwater and surface water
systems to:
Prevent property damage
Maintain hydrologic balance
Protect water quality for the safety and enjoyment of citizens & the preservation and enhancement of wildlife habitat. 1990
Planning mandates
Comprehensive Management Plan
Watershed DistrictWatershed Act
(M.S. 103D)
WMOMetropolitan Water
Management Act(M.S. 103B)
MS4Clean Water ActNPDES-SWPPP
(40 CFR 112)
Water ResourcesChanges in ConditionsAvailable online: www.cooncreekwd.org
ReviewsCurrent Plan2000-2009 Changes & TrendsImplications of Changes & Trends2020 Management Expectations
Issues
Physical
ManagementSocial
Physical Issues: Supply & Capacity Concerns
Hydrology BiologyGeologyChemistry
Word of the Day: Biogeochemisis
Supply Issue
Less annual precipitationGreater occurrence of larger precipitation events over smaller areas
Annual Precipitation (Last Decade)
y = -0.4053x + 33.5350.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Pre
cip
(in
.)
Annual (Last decade) Linear (Annual (Last decade))
Supply Issue
Surficial Groundwater Scarcity
800
810
820
830
840
850
860
870
880
890
900
910
920
Round
Lk Bld
Hanso
n
Univer
sity
Centra
l
Lexin
gton
Sand
Clay
Supply Issue
Surface Water
Social Issues
Issues of Direct & Indirect Demand
Demand Issues
Direct
Drainage
Water Source
Recreation
Indirect
Flood Control
Groundwater Recharge
Water Quality
Drainage: Decrease in Acres, Increase in Need
Direct Demand Issues
Direct-Demand
Water Source
Increase in Demand
Indirect Demand Issues
Flood ControlMore “localized” Regional flood events
(Andover x Ham Lake)
Groundwater RechargeNeed approximately 10 to 15,000 AFPY for
10 years to return to 1988 elevations
Indirect Demand Issues
TMDLDevelopBiota
MaintainVolume
MaintainDissolved Oxygen
2.5ReducePhosphorus
8ReduceTSS
3ReduceTurbidity
FactorNeedWater Quality
Management Issues
Technology & Know-HowFundingRegulationPublic RelationsAllocation & Decision Making
Management IssuesTechnology & Know-how
Groundwater x Surface water modeling
Large-scale infiltration
Infiltration/Groundwater recharge for target water body
Management IssuesFunding
Equitable & sufficient financing approaches
thatreflect full economic value of water resource
Management IssuesPublic Relations
Informing the public about ways to reduce stormwater pollution
Involving the public in stormwater management
Management IssuesRegulation
Facilitating required changesInfiltration/water conservationMinimum Impact Development Standards
(MIDS)Impaired water goalsAnti-Degradation GoalsCoordinated water planning
Management IssuesGovernment Relations
Increased Coordination & Collaboration inProjectsProgramsFunding
Sustainable Issues
Control post development peak to predevelopment rate
Evaluate 100 yr event
FloodplainOverbank Flood Protection
Extreme Storm
Reduce erosive velocities & unstable conditions
Ditches & DrainageChannel Protection
NeedIssue
Deteriorating Issues
Retain some of the load by retaining volume
Erosion & Sed. Control
NeedIssue
Serious Issues
Infiltrate to predevelopment Soil Hydro group or greater
Retain some of the load by retaining volume
Groundwater
Wetlands & Lakes
Water Quality
NeedIssue
Types of IssuesTypes of Issues
Existing conditions require immediate attention because
2. They are a serious threat
And/or
6. There is no known technology or management strategy for dealing with them
1. Management and technology are not expected to keep pace with demands for resource uses,
and/or
5. Resource conditions will deteriorate in the future
Management can sustain existing conditions and/or projected levels of use
SeriousDeterioratingSustainable
Serious ConditionSerious ConditionGroundwater
SustainableSustainableFloodplain
DeterioratingSustainableErosion & Sed. Control
SustainableSustainableWildlife
Serious ConditionDeterioratingWetlands & Lakes
Serious ConditionSustainableWater Quality
SustainableSustainableDitches & Drainage
20102000Resource
Types of IssuesTypes of Issues
Require immediate attention
• They present serious problems
• There is no known management strategy or technology for dealing with them
1. Future management and technology are not expected to keep pace with demands for resource uses,
and/or
5. Resource conditions will deteriorate in the future
Existing conditions and projected levels of use can be sustained with current and expected future levels of management.
SeriousDeterioratingSustainable