Salmon Creek Comprehensive Drainage Basin Plan, June 2004, as approved by Thurston County and the City of Tumwater.

Note: The basin plan on this Web page has been divided into several PDFs to make it easier for viewers to find information.  Although the PDFs are generally about 25-35 pages long, they still take time to load because the PDFs were created by scanning a paper-version of the document (as opposed to simply converting a Word document to a PDF).

Instead of waiting to view the files through this web site, a better choice is to right-click the underlined hyperlink and then "save target" (ie., save the file) to your own computer and open it from there. 

Use the magnifying glass in Adobe to zoom in. See the Phase I report, which contains information and modeling results from URS Corporation and Pacific Groundwater Group.  

Phase I laid the groundwork for the basin plan featured below.

Section 1 (PDF)

• Acknowledgements
• Tumwater and Thurston County resolutions adopting the plan
• Executive Summary

Section 2 (PDF)

• Chapter 1 The Planning Process
• Chapter 2 Use and Authority of This Plan
• Chapter 3 Overview of Historical Maps, Conveyances, and Studies since 1878

Section 3: Chapter 4 Basin Characterization (PDF)

Section 4: Chapter 5 Analysis of Non-conveyance Alternatives (PDF)

Section 5: Chapter 6 Analysis of Conveyance Alternatives (PDF)

Section 6 (PDF)

• Chapter 7 Recommendations
• Chapter 8 Recommended Plan Implementation

Section 7 (PDF)

• Appendix A  Model Development
• Appendix B Additional Tables from Chapter 5
• Appendix C Hazard Mitigation Grant Program and Community Development Block Grant Program
• Appendix D  Cost Estimates for Conveyance Alternatives
• Appendix E Maps related to the plan (see "Maps" below)

Section 8 (PDF)

• Appendix F, List of Exhibits
• Appendix G, Definitions, Acronyms, Abbreviations
• Appendix H, Board of County Commissioners Resolutions Pertaining to Salmon Creek Basin References

Map PDFs (Appendix E) 

Figure 3-1a Salmon Creek Basin 1883 Survey

Figure 3-1b Salmon Creek Basin 1884 Survey 

Figure 3-2 Thurston County Salmon Creek Drainage Basin

Figure 4-1 Salmon Creek Drainage Basin, Sub-Basins & 10-foot Contour Interval

Figure 4-2 Hydrogeologic Cross Section 

Figure 4-3 Estimated Depth-to-Water Winter 1999 

Figure 4-4 Spring 1999 Selected Flood Areas 

Figure 4-5 Salmon Creek Basin Wetlands with 200-foot Buffer and Streams with 100-foot Buffer 

Figure 4-6 Football Field Analogy 

Figure 4-7 Salmon Creek Basin Aerial Photos from 2002 

Figure 4-8 Salmon Creek Basin Zoning Designations & Associated Effective Impervious Area 

Figure 4-12 Potential LOTT Areas of Interest 

Figure 6-1 Rhondo Pond to Fishtrap Creek 

Figure 6-2 Rhondo Pond to Littlerock Road 1 

Figure 6-3 Rhondo Pond to Littlerock Road 2 

Figure 6-4 Rhondo Pond to Jones Road 

Figure 6-5 93rd to Jones Road 

Figure 6-6  East Basin Alternative 

Figure 6-7 Hickman Sub-Area Drainage Improvement Project, Modeled Change in Flooded Area