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Chanhassen’s 2006 Surface Water Management Plan

Chanhassen’s 2006 Surface Water Management Plan. Carver County WENR Meeting March 27, 2007. Lori Haak Water Resources Coordinator 952.227.1135 lhaak@ci.chanhassen.mn.us. Overview. Chanhassen at a Glance Review of Process Products Outcomes Work Plan Tools Challenges Questions.

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Chanhassen’s 2006 Surface Water Management Plan

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  1. Chanhassen’s 2006 Surface Water Management Plan Carver County WENR Meeting March 27, 2007 Lori Haak Water Resources Coordinator 952.227.1135 lhaak@ci.chanhassen.mn.us

  2. Overview • Chanhassen at a Glance • Review of Process • Products • Outcomes • Work Plan • Tools • Challenges • Questions

  3. Chanhassen at a Glance

  4. Why Update? • Compliance • Metropolitan Surface Water Management Act • National Pollutant Discharge Elimination System Program • WMO Plans • Improve accuracy & efficiency • Infrastructure • Goals & Policies • Development Standards

  5. SWMP Update Process • Update of Water Quantity Model • Lake Management Strategies • Public Input & Involvement • Public hearings • 7 Task Force meetings • Technical subcommittee • Funding Revisions • City Code Update

  6. New & Refined Tools • Goals & Policies

  7. Goals

  8. New & Refined Tools • Goals & Policies • Water Resource Classification System

  9. Water Resource Classification

  10. New & Refined Tools • Goals & Policies • Water Resource Classification System • Stormwater System Inventory

  11. Stormwater System Inventory

  12. New & Refined Tools • Goals & Policies • Water Resource Classification System • Stormwater System Inventory • Hydrologic Model Update

  13. Hydrologic Model Update

  14. New & Refined Tools • Goals & Policies • Water Resource Classification System • Stormwater System Inventory • Hydrologic Model Update • Wetland Inventory, Assessment & Plan

  15. Wetland Inventory

  16. New & Refined Tools • Goals & Policies • Water Resource Classification System • Stormwater System Inventory • Hydrologic Model Update • Wetland Inventory, Assessment & Plan • Water Body Evaluation Update • Standards (in progress)

  17. Outcomes • Work Plan Prioritization • Physical system improvement needs • NPDES Permit compliance • Ordinance updates • Budgeting/Financing the program • Efficient & Effective Delivery • Development reviews • Taking advantage of higher return opportunities

  18. Work Plan • Water Quantity • Reduce impact of high water levels on Lotus Lake • Review easements & emergency overflows • Reduce flows in Bluff Creek • Water Quality • Protect Seminary Fen; Assumption Creek • Improve Lotus & Riley Lakes; Bluff & Riley Creeks • Maintain other water bodies/steady trends • Inspections & maintenance

  19. Work Plan • Wetlands • Buffers & setbacks • Use MnRAM data to guide decisions • Erosion & Sediment Control • Development review • Construction site inspection → CSWCD • Restore & stabilize scours • Finance & Regulatory Responsibilities • Maintain adequate funding • Remain primary permitting authority

  20. Surface Water Management Plan • Available on the City’s website at www.ci.chanhassen.mn.us • Departments and Services • Natural Resources • Second Generation Surface Water Management Plan

  21. Tools • Stormwater ponds • Swales • Rain gardens & infiltration/filtration • Clustering development • Alternatives to impervious surfaces • Green roofs • Underground retention • Cooperation!

  22. General Challenges • Managing expectations • Aesthetics • Development • Retrofitting • Non-degradation • Funding • E&SC on individual home sites • Effective educational programs • Stabilizing waterways • Multiple WMOs

  23. Specific Challenges • Implementation • Capabilities • Soils • Groundwater • Inspection • Maintenance • Tracking/Enforcement

  24. What We’ve Learned… • Think ahead • Start now to identify and protect exceptional resources • Use available resources • County/State/Federal • Seasoned veterans • Establish funding sources • If possible, acquire property now that you’ll need later • Embrace creativity

  25. Seminary Fen Wetland Complex Questions? Lori Haak Water Resources Coordinator Phone: 952.227.1135 Email: lhaak@ci.chanhassen.mn.us Web Site: www.ci.chanhassen.mn.us

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