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Total Maximum Daily Loads (TMDLs) Program
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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.
TMDL approved by the US 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
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Appendix A-10: Agricultural Water Quality Management Plan PDF
- Response to Public Comment PDF 2.1mb
TMDL approved by the US Environmental Protection Agency (EPA) on September 29, 2005
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Fact Sheet - Walla Walla Basin in Oregon: Temperature TMDL PDF
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TMDL
Order Memorandum - September 13, 2005 PDF
- Total Maximum Daily Load (TMDL) and Water Quality Management Plan (WQMP) PDF 2.6mb
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Appendix
A: Temperature Analysis PDF 13.3mb
- Response to Comments PDF
TMDL Approved by EPA on February 19, 2007
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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
- Umatilla Basin Coordinator: Don Butcher
e-mail 541-278-4603 Pendleton
- DEQ Eastern Region Office Information
- Basin Coordinator List PDF
For more information about DEQ's Total Maximum Daily Loads (TMDLs) Progam contact Gene Foster by phone at (503) 229-5325 or by e-mail, or contact the appropriate Basin Coordinator.
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