• Cache Creek Resources Management Plan (2019)
• Cache Creek Improvement Program (2019)
• Off-Channel Mining Plan (2019) [2021 Errata]

• In-Channel Mining Ordinance (2019)
• Off-Channel Surface Mining Ordinance (2019)
• Surface Mining Reclamation Ordinance (2019)
• Gravel Mining Fee Ordinance (2020)
• Flood Protection Ordinance Excerpts (2019)

• California Department of Fish and Wildlife - 1600 Streambed Alteration Agreement - Routine Maintenance
• California Department of Fish and Wildlife - 1600 Routine Maintenance Agreement - Sand & Gravel Extraction
• Central Valley Regional Water Quality Control Board - 401 Water Quality Certification

• Off-Channel Mining Plan - Environmental Impact Report (1996)
  • Click the above link to access all 1996 OCMP EIR documents
• Off-Channel Mining Plan - Notice of Determination (1996)
• Cache Creek Resources Management Plan - Environmental Impact Report (1996)
  • Click the above link to access all 1996 CCRMP EIR documents
• Cache Creek Resources Management Plan - Notice of Determination (1996)
• CCRMP and CCIP Final Supplemental Environmental Impact Report (2002)
• Cache Creek Resources Management Plan - Notice of Determination (2002)
• Board Resolution Adopting CCRMP, CCIP, Final SEIR (2002)
• CCAP General Plan Amendment, 2011-1 (Yolo County Board of Supervisors Staff Report)
• CCAP General Plan Amendment, 2011-1 (Planning Commission Staff Report)

Please note that some documents below have large file sizes and could take longer to download or open.

Off-Channel Aggregate Wet Pits - Fish Mercury Monitoring Reports

• 2024 (Report Posted 11/07/2025)
• 2023 (Report Posted 11/07/2025)
• 2022 (Report Posted 07/02/2025)
• 2021
• 2020
• 2019
• 2018
• 2017
• 2016
• 2015

Off-Channel Aggregate Wet Pits - Water Column Profiling Reports

• 2024 (Report Posted 11/07/2025)
• 2023 (Report Posted 11/07/2025)
• 2022 (Report Posted 07/02/2025)
• 2021
• 2020
• 2019
• 2018

Off-Channel Aggregate Wet Pits - Bottom Sediment Analysis Reports

• 2018

Baseline Mercury Reports

• 2022 Baseline Mercury Monitoring Report (Report Posted 11/07/2025)
• 2011-2012 Baseline Mercury Monitoring Report
• Mercury in Lower Cache Creek Biota: Baseline Assessment (Fall 1997)

Other Mercury Related Documents

• Revised Mercury Monitoring Protocols (2021)
• Cache Creek Nature Preserve Mercury Monitoring Program - 6th Report (2004)
• Cache Creek Nature Preserve Mercury Monitoring Program - 5th Report (2003)
• Cache Creek Nature Preserve Mercury Monitoring Program - 4th Report (2002)
• Cache Creek Nature Preserve Mercury Monitoring Program - 3rd Report (2002)
• Cache Creek Watershed Preliminary Mercury Assessment, Using Benthic Macro-Invertebrates (1997)
• Off-Channel Gravel Pit Lakes - Mercury Considerations - Lower Cache Creek (1996)

• Assessment of Reclamation of Mined Lands to Agriculture Under the Yolo County CCAP (2021)
• Yolo County Aggregate Mining Economic Analysis (2021)
• 2017 Technical Studies and 20-Year Retrospective for the Cache Creek Area Plan (2017)
• Lower Cache Creek Blue Elderberry Report (2017)
• Lower Cache Creek Invasive Species Mapping and Prioritization Project (2016)
• Cache Creek Ten Year Water Quality Analysis (2010)
• Cache Creek Fisheries Survey Technical Report (2008)
• UC Davis Biosentinel Report (2006)
• Preliminary Wetlands Delineation Report (2002)
• Review of Lower Cache Creek Water Quality (2002)
• Technical Report for Hydraulic Analysis Results (2002)
• Economic Analysis of the Cache Creek Off-Channel Mining Plan (1996)
• 1995 Technical Studies and Recommendations for the Lower Cache Creek Resource Management Plan

Cover and Table of Contents

1. Introduction

2. Executive Summary

3. Cache Creek Streamway Study

    3.1 Streamway Study Introduction

    3.2 Basin Geology and Geomorphology

    3.3 Hydrology, Hydraulics, and Sediment Yields

    3.4 Cache Creek History of Human Influences

    3.5 Changes in Channel Morphology

    3.6 Channel Dynamics

4. Lower Cache Creek Groundwater Study

    4.1 Groundwater Study Introduction

    4.2 Available Data

    4.3 Hydrogeologic Setting

    4.4 Historical Perspective

    4.5 Aggregate Mining and Groundwater Resources

5. Biological Resources Study

    5.1 Biological Resources Study Introduction

    5.2 Ecology of Riparian Habitat

    5.3 History of Habitat and Human Influences

    5.4 Existing Conditions

    5.5 Special-Status Species and Other Wildlife

    5.6 Weeds

    5.7 Habitat Restoration: Present Potential and Limitations

6. Recommendations

7. Report Preparation

8. References

9. Glossary

Cover and Table of Contents

1. Introduction

2. Summary of Impacts and Mitigation Measures

3. Description of Project and Alternatives

4. Environmental Analysis

    4.1 Introduction to Environmental Analysis

    4.2 Land Use and Planning

    4.3 Geology and Soils

    4.4 Hydrology and Water Quality

    4.5 Agriculture

    4.6 Biological Resources

    4.7 Air Quality

    4.8 Traffic and Circulation

    4.9 Noise

    4.10 Aesthetics

    4.11 Cultural Resources

    4.12 Hazards

    4.13 Public Services

5. CEQA Considerations

6. Report Preparation

7. Appendices

Appendix 7.4 (Bound Separately)

Response to Comments: EIR for the Off-Channel Mining Plan

Cover and Table of Contents

1. Introduction

2. Summary of Changes

3. List of Commenters

4. Response to Comments

Appendix A. Revised Summary Table

Appendix B. Mitigation Monitoring Plan

Appendix C. Off-Channel Gravel Pit Lakes - Mercury Considerations

Cover Page and Table of Contents

1. Introduction

2. Summary of Impacts and Mitigation Measures

3. Description of Project and Alternatives

4. Environmental Analysis

    4.1 Introduction to Environmental Analysis

    4.2 Land Use and Planning

    4.3 Geology and Soils

    4.4 Hydrology and Water Quality

    4.5 Agriculture

    4.6 Biological Resources

    4.7 Air Quality

    4.8 Traffic and Circulation

    4.9 Noise

    4.10 Aesthetics

    4.11 Cultural Resources

    4.12 Hazards

    4.13 Public Services

5. CEQA Considerations

6. Report Preparation

7. Appendices

    7.1 Notice Of Preparation, Written Comments, and Summary of Scoping Meeting

    7.2 Fundamental Concepts of Environmental Noise

    7.3 Cache Creek Improvement Program

CCRMP EIR Response to Comments

Cover and Table of Contents

1. Introduction

2. Summary of Changes

3. List of Commenters

4. Response to Comments

Appendix A. Revised Summary Table

Appendix B. Mitigation Monitoring Plan