A look at the trends for water resources in teh Coon Creek watershed in Anoka County, MN. This is part of our 10-year planning process.

1. Coon Creek Watershed District Water Resource Assessment & Issues July 14, 2010

3. 3/30 Meeting Review Approach & Process * Agency Review * Implementation: Goals & Measures * Issues & Concerns * - Resource Trends & Implications * Review Requirements & Issues Q1 Q4 Q3 Q2 Q1 2011 2010

4. Local Agency Attendance * * CLAA * * * * * 3/30 * Coon Rapids * Ham Lake Columbus * Blaine * Andover * Anoka County * ACD 7/14 Invites

5. State Agency Attendance * * * * 7/14 DA-agriculture DH -health - DOT * PCA * Met Council * DNR * BWSR 3/30 Invites

6. March Meetings 3. Review of Stated Issues & Concerns

7. CCWD Board Issues & Concerns 3/8/10 Working through with State Agencies Water quantity vs. quality conflicts Many physical resource needs may be beyond our control Groundwater-Surface Water Connection Getting ahead of increasing water quality concerns Effective and quick enforcement Enforcement Concern Issue

8. Planning Advisory Group Issues & Concerns 3/30/10 6. Credit for ponds that infiltrate 5. Infiltration - groundwater effect 4. Buffer Strips 3. Earth Friendly Ditch Management – Multiple Use 2. Lake Management Plans for other lakes 1. Water Quality- TMDLs: City Involvement 12. Groundwater Modeling standards 11. Effect of Mining/dewatering on wetlands – subwatershed 10. Document District Retrofit efforts 9. Document collaboration with I&E efforts 8. Wetland Functions & Values assessment 7. Coordination of monitoring for state/other permit reports

9. BWSR Initial Issues & Concerns Include budget; key water bodies, party collecting data; type of data collected; Trends Detailed Water Monitoring Program For use in grant applications O&M & Capital Prioritization General Schedule Reasonable & Measurable Goals & Objectives City environmental committees, Neighborhood Assoc. Public Involvement Process Status of Progress – What has been completed? Notes Issue/Concern

10. MPCA Initial Issues & Concerns 4. Implementation schedule & responsibilities 3. Stormwater runoff goals and standards 5. Wetland Functions & Values 7. Monitoring Program 2. Impaired waters goals 6. Wetland Regs. consistent w/ MR 7050 1. LID/MID Principles

12. Physical Resource Issues Comprehensive Plans Lakes Functional Assessment Wetlands General Water Quality Quality vs Quantity tradeoffs Water Quality Effect of infiltration on GW Quality Effects of dewatering Groundwater x Surface water Groundwater

13. Managerial Issues Naturalized Ditch Design Policy & Planning Benefits & Priorities Values Credits Principles (LID/MID &7050) Coordination Enforcement & Regulation Standard approach Modeling Comp Plan, TMDL Involvement/Coordination Schedule Goals & Objectives Measures Performance & Document

14. Online: www.cooncreekwd.org Reviews Current Plan 2000-2009 Changes & Trends Implications of Changes & Trends 2020 Management Expectations 4. Changes in Resource Conditions

16. Precipitation Frequency of occurrence remains the same CCWD 2010

18. Surficial Groundwater Landscapes River Terrace Lake Deposits

19. Generalized Profile (Upper 120 ft) MPCA 1997 River Terrace Lake Deposits Water Table Sand Clay Direction of Flow

20. Surficial Groundwater Used Elevation change 1978 to 2008 CCWD 2010

28. Population Trends 1.3% average annual growth 13% 139,307 16,686 44,005 623 50,987 27,006 2020 12% 123,649 Total 13% 22% Change 11% 15,017 Ham Lake -1% 44,479 Coon Rapids 23% 508 Columbus 29% 39,597 Blaine 12% 24,048 Andover Change 2010

36. Flood Control Groundwater Recharge Water Quality 5b. Indirect Demands

39. Water Quality & Stormwater TMDL Develop Biota Maintain Volume Maintain Dissolved Oxygen 2.5 Reduce Phosphorus 8 Reduce TSS 3 Reduce Turbidity Factor Action Parameter

40. 7. Water Management Issues

41. Temporal Issues Thinking about the next 10 years Precipitation 30” per yr + 2” Continue to Decline < 28” per yr (40%) Return to Normal 30” + 2 (40%) Increase >33” per yr (20%) Get Drier Stays Dry Gets Wet

43. Key Issues Evaluate 100 yr event Extreme Storm Control post development peak to predevelopment rate Overbank Flood Protection Reduce erosive velocities & unstable conditions Channel Protection Infiltrate to predevelopment Soil Hydro group Groundwater Recharge Retain some of the load by capturing amount or volume Water Quality Volume Need Issue

46. Obvious Issues & Concerns From Resource Assessment

52. Issue Chain Decline in Precipitation Decrease in Groundwater Recharge Decline in Surficial Groundwater Levels Decline in Lake levels, Wetlands Increased Need to Irrigate Decreased Need To Drain Further Decline in Groundwater Levels Increased Stress on Fishery & Wildlife Decrease in Recreational Use Increase in “dry” Marginal Land Higher Intensity Rainfall Events Increased Volume & Rate of Runoff Increased Potential For Local Flooding Increased Erosion TSS & Turbidity Increased Stress on Fishery & Biota More Involved Site Assessments Increased Water Harvesting Increased Potential For Local Flooding Increase in Dewatering Increased Evaporative Loss thru Lakes