Lake Sawyer Management Plan

The Lake Sawyer Management Plan reports on the condition of Lake Sawyer, located near Black Diamond, and the mechanisms affecting the lake’s water quality, such as excessive nutrient loading.

The document lays out long-term management goals for the lake and describes the plan to meet those goals, including actions to reduce nutrient pollutants flushed into the lake by stormwater, and near-term treatment of the lake for nutrients already concentrated in lake sediments.

The Lake Sawyer Management Plan was published in 2000 by King County Surface Water Management (SWM) with assistance from consultants Entranco, Inc. Funding for this work was provided by the Washington State Department of Ecology, U.S. Environmental Protection Agency, and King County SWM – the precursor to King County Water and Land Resources Division.

The Lake Sawyer Management Plan  is offered in Adobe Acrobat format. For help using Acrobat, please visit our Acrobat help page.

Download document here:

• Lake Sawyer Management Plan main document (8.7 Mb)

Technical appendices

• Appendix A: SEPA Checklist (952 Kb)
• Appendix B: Lake Sawyer Data, 1994-1995  (5.2 Mb)
• Appendices C through J  (5.6 Mb)
• Appendix C: Modeling and Water/Nutrient Budget Methods and Assumptions
• Appendix D: Aquatic Plant Management Plan
• Appendix E: Public Access Inventory
• Appendix F: Total Maximum Daily Load (TMDL)
• Appendix G: Lake Sawyer Watershed Bioassessment Case Study: 1995
• Appendix H: Timing of Juvenile Coho Salmon Emigration from  the Lake Sawyer Drainage Basin
• Appendix I: Contingency In-Lake Measures for Phosphorus Control in Lake Sawyer
• Appendix J: QA/QC Plan
• Appendices K through N (6.1 Mb)
• Appendix K: Watershed Sampling
• Appendix L: Land Use Parameters for Modeling
• Appendix M: Ecology Equivalency Review Matrix
• Appendix N: Conceptual Stormwater Plan for Rock/Ginder Creek Drainage Area
• Appendix O: Response to Comments on the Lake Sawyer Draft Management Plan (3.7 Mb)

For questions about the Lake Sawyer Management Plan , please contact Sally Abella, senior engineer, Lake Stewardship Program.