The Umatilla Basin

Positive actions are being undertaken and accomplished to improve water quality in the drainage areas of the Umatilla River and Willow Creek. We appreciate your interest and involvement. Together we can work towards a better river environment for everyone.

Umatilla Subbasin Willow Creek Subbasin Basin Contact Information

Umatilla Subbasin

TMDL approved by the U.S. Environmental Protection Agency (EPA) on May 9, 2001

• Coordinating the Temperature Water Quality Standard and Umatilla Subbasin TMDL PDF
• Total Maximum Daily Load (TMDL) and Water Quality Management Plan (WQMP) PDF 12.8mb
• Appendix A-1: Glossary PDF
• Appendix A-2: Abbreviations and Acronyms PDF
• Appendix A-3: Site Potential Approximation PDF
• Appendix A-4: Temperature Technical Analysis PDF 8.1mb
• Appendix A-5: Turbidity Goal PDF
• Appendix A-6: Sediment Technical Appendix PDF 1.3mb
• Appendix A-7: Water Quality Standards PDF
• Appendix A-8: Noxious Weeds PDF 1.1mb
• Appendix A-9: References PDF
• Appendix A-10: Agricultural Water Quality Management Plan PDF
   
• Response to Public Comment PDF 2.1mb

Willow Creek Subbasin

TMDL Approved by the U.S. Environmental Protection Agency (EPA) on February 19, 2007

• Fact Sheet: Willow Creek Subbasin - Water Quality Objectives for Temperature, pH and Bacteria PDF
   
• Total Maximum Daily Load (TMDL) and Water Quality Management Plan (WQMP) PDF (4.6 mb)
• Appendix D: Stream Temperature Analysis PDF (2.3 mb)
• Response to Public Comment PDF
• TMDL Order Memo PDF

Contact Information

• Umatilla Basin Coordinator: Don Butcher  e-mail  (541) 278-4603
   
• DEQ Eastern Region Office Information
• Basin Coordinator List PDF

[print version]