Nine Mile Creek Watershed District

Water Management Plan

 

Table of Contents

1.0 Executive Summary (.PDF file, 173 kb)

1.1 Introductory Information

1.2 Watershed District Purposes

1.2.1... General Watershed District Purposes

1.2.2... Historical NMCWD Purposes and Past Successes

1.2.3... NMCWD Vision Statement

1.3 NMCWD Plan Organization and Summary

2.0 Land and Water Resource Inventory (.PDF file, 265 kb)

2.1 General Watershed Boundaries

2.2 History

2.3 Inventory of Water Resource and Physical Factors

2.4 Precipitation

2.5 General Geology and Topographic Data

2.6 Surface Water Resource Data

2.6.1... Wetlands

2.6.2... Hydrologic System Characteristics

2.6.3... Lakes and Streams

2.6.4... Shoreland Ordinances

2.6.5... Surface Water Appropriations

2.7 Groundwater Resource Data

2.8 Soil Data

2.9 Land Use and Public Utility Services

2.10  Water-Based Recreation Areas and Land Ownership

2.11  Fish and Wildlife Habitat

2.12  Unique Features and Scenic Areas

2.13  Pollutant Sources

3.0 Impact on Other Units of Government (.PDF file, 137 kb)

3.1 Background

3.2 Public Input to this Plan

4.0 General Statement of Goals and Policies (.PDF file, 211 kb)

4.1 Stormwater Management

4.1.1... Importance

4.1.2... General Issues

4.1.3... Goals

4.1.4... Policies to Achieve Goals

4.1.5... Objectives and Actions

4.2 Surface Water Quality

4.2.1... Importance

4.2.2... General Issues

4.2.3... Goals

4.2.4... Policies to Achieve Goals

4.2.5... Objectives and Actions

4.3 Open Spaces and Recreational Uses

4.3.1... Importance

4.3.2... General Issues

4.3.3... Goals

4.3.4... Policies to Achieve Goals

4.3.5... Objectives and Actions

4.4 Wetlands Management

4.4.1... Importance

4.4.2... General Issues

4.4.3... Goals

4.4.4... Policies to Achieve Goals

4.4.5... Objectives and Actions

4.5 Groundwater Protection

4.5.1... Importance

4.5.2... General Issues

4.5.3... Goals

4.5.4... Policies to Achieve Goals

4.5.5... Objectives and Actions

4.6 Land Use Management

4.6.1... Importance

4.6.2... General Issues

4.6.3... Goals

4.6.4... Policies to Achieve Goals

4.6.5... Objectives and Actions

4.7    Floodplain Management

4.7.1... Importance

4.7.2... General Issues

4.7.3... Goals

4.7.4... Policies to Achieve Goals

4.7.5... Objectives and Actions

4.8 Education and Outreach

4.8.1... Importance

4.8.2... General Issues

4.8.3... Goals

4.8.4... Policies to Achieve Goals

4.8.5... Objectives and Actions

4.9 Administration

4.9.1... Importance

4.9.2... General Issues

4.9.3... Goals

4.9.4... Policies to Achieve Goals

4.9.5... Objectives and Actions

5.0 Assessment of Problems (.PDF file, 4.5 MB)

5.1 Lake Water Quality Problems

5.2 Stream Water Quality Problems

5.2.1... Physical Classification of Nine Mile Creek

5.2.1.1 Introduction

5.2.1.1.1 Description of Nine Mile Creek

5.2.1.1.2 Utrbanization Influences on Nine Mile Creek Flood Frequency and Magnitude

5.2.1.1.3 Sediment Transport

5.2.1.2 Methods

5.2.1.2.1 Physical Classification System Description

5.2.1.2.2 Sensitivity to Disturbance by Stream Type

5.2.1.2.3 Data Collection

5.2.1.2.4 Mapping

5.2.1.3 Results

5.2.1.3.1 Physical Classification—Reference Reaches

5.2.1.3.2 Extrapolation of Physical Classification to Entire Stream

5.2.1.4 Attainable Stream Conditions—Identified Water Quality Problems

5.2.2... Ecological Use Classification of Nine Mile Creek

5.2.2.1 Introduction

5.2.2.2 Methodology

5.2.2.3 Results

5.2.2.3.1 North Fork

5.2.2.3.2 South Fork

5.2.2.3.3 Main Stem

5.2.2.4 Ecological Use Limitation Factors

5.2.3... Benthic Macroinvertebrates as Stream Quality Indicators

5.2.4... Runoff-Related Water Quality Monitoring

5.3 Condition of County Ditches

5.3.1... County Ditch 1

5.3.2... County Ditch 41

5.3.3... County Ditch 34

5.4 Flooding and Stormwater Rate Control Issues

5.5 Impacts of Water Quality and Quantity Management Practices on Recreation Opportunities

5.6 Impacts of Stormwater Discharges on Water Quality and Fish and Wildlife Resources

5.7 Impact of Soil Erosion on Water Quality and Quantity

5.8 General Impact of Land Use Practices on Water Quality and Water Quantity

5.9 Adequacy of Existing Regulatory Controls to Manage or Mitigate Adverse Impacts on Public Waters and Wetlands

5.10  Adequacy of Capital Improvement Programs

5.11  Future Potential Problems

6.0 Implementation Program (.PDF file, 197 kb)

6.1    Implementation Program Responsibilities

6.2    Regulatory Controls

6.2.1... Wetlands Conservation Act

6.2.2... Erosion and Sedimentation Controls and Programs

6.2.3... Local Erosion and Sedimentation Controls

6.2.4... Local Shoreland and Floodplain Ordinances

6.2.5... Water Quality Nuisances

6.3 Stormwater and Drainage Design Performance Standards

6.3.1... Target In Lake Nutrient Concentrations

6.3.2... Maximum Permissible Runoff Rate and Volume

6.3.3... Flooding Impact Standards

6.3.4... Design Criteria for Stormwater Outlet Structures

6.3.5... Water Quality Basin Design Methodology

6.3.6... Pollutant Loading Requirements

6.3.7... Variances

6.4 Information Program

6.5 Data Collection Programs

6.5.1... Location of Sampling Sites

6.5.2... Lake Water Quality Monitoring Protocol

6.5.3... Stream Water Quality Monitoring Protocol

6.5.4... Periodic Analysis of Data

6.6 Management Programs

6.7 Potential Structural Solutions to Problems

7.0 Impact on Local Government (.PDF file, 102 kb)

7.1 Impact on Local Governments

8.0 Implementation Priorities (.PDF file, 148 kb)

8.1 Background and Historic Projects

8.2 Pending Projects

8.3 Future Capital Improvement Projects

9.0 Implementation Components (.PDF file, 108 kb)

9.1 Regulatory Controls

9.2 Responsibilities

9.3 Capital Improvement Program

9.4 Enforcement

9.5 Administration Process

10.0  Amendments to the Plan (.PDF file, 105 kb)

10.1  General Amendment Procedure

10.2  Minor Amendments to Capital Improvements

10.3  Form of Amendments

10.4  Distribution of Amendments

List of Abbreviations and Acronyms (.PDF file, 90 kb)

Glossary (.PDF file, 109 kb)

Acknowledgement (.PDF file, 86 kb)