Chanhassen’s 2006 Surface Water Management Plan Carver County WENR Meeting March 27, 2007 Lori Haak Water Resources Coordinator

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

Chanhassen at a Glance

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

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

New & Refined Tools  Goals & Policies

Goals 1 Water Quantity To provide at least 100-year flood protection for all persons & structures. 2 Water Quality To achieve water quality standards in lakes, streams, & wetlands consistent with designated use & established classifications. 3Wetlands To protect & rehabilitate wetlands to maintain or improve their function & value. 4 Erosion & Sediment Control Minimize soil erosion & sedimentation. 5Financing Establish & maintain funding sources. 6RegulatoryResponsibilities Maintain primary responsibility for managing water resources at the local level, but continue coordination & cooperation with other agencies & organizations. 7PublicEducation & Information Provide information & educational resources to improve knowledge & promote active public role in resource management.

New & Refined Tools  Goals & Policies  Water Resource Classification System

Water Resource Classification ManagementClassManagementStrategyStormwaterTreatmentWaterResourceUseDesignation Preserve Preserve & improve, impose highest standards. NURP plus EnhancedTreatment Seminary Fen Calcareous Fen Assumption Creek Trout Stream Improve - 1 Goal to improve trends, impose higher trends, impose higher standards. These waters are “ impaired. ” NURP plus EnhancedTreatment Lotus Lake Rec. Development Lake Riley Rec. Development Bluff Creek Natural Stream Riley Creek Natural Stream Improve - 2 Goal to maintain or improve. Look for opportunities to apply higher standards. NURP plus Enhanced Treatment, if Feasible Lake Ann Rec. Development Christmas Lake Rec. Development Lake Minnewashta Rec. Development Manage Goal to maintain water quality & keep long- term trends stable to ImprovingNURP Harrison Lake Natural Environment Lake Lucy Rec. Development Rice Marsh Lake Natural Environment Silver Lake Natural Environment Lake Susan Rec. Development Lake St. Joe Natural Environment UtilizeN/AN/A Storm Water Ponds Treatment System

New & Refined Tools  Goals & Policies  Water Resource Classification System  Stormwater System Inventory

Stormwater System Inventory

New & Refined Tools  Goals & Policies  Water Resource Classification System  Stormwater System Inventory  Hydrologic Model Update

Hydrologic Model Update

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

Wetland Inventory

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)

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

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

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

Surface Water Management Plan Available on the City’s website at  Departments and Services  Natural Resources  Second Generation Surface Water Management Plan

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

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

Specific Challenges  Implementation  Capabilities Soils Soils Groundwater Groundwater  Inspection  Maintenance  Tracking/Enforcement

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

Questions? Lori Haak Water Resources Coordinator Phone: Web Site: Seminary Fen Wetland Complex