DEQ's mission is to be a leader in restoring, maintaining and enhancing the quality of Oregon's air, land and water.

Lower Grande Ronde Basin

TMDL title: Lower Grande Ronde Subbasins TMDL and WQMP
Water quality limited parameters: ammonia toxicity, aquatic weeds or algae, E. coli, fecal coliform, nitrate, pH, sedimentation, temperature, turbidity
Pollutants: ammonia nitrogen, heat, E. coli, nitrate, total suspended solids, turbidity
Status: EPA approved on Dec. 17, 2010

Final TMDL documents

TMDL Order Memo
Environmental Protection Agency Approval Letter
Fact Sheet: Reducing Water Pollution in the Lower Grande Ronde, Wallowa, and Imnaha Subbasins
Executive Summary
Chapter 1: Overview and Background
Chapter 2: Stream Temperature TMDL
Chapter 3: Bacteria TMDL
Chapter 4: Water Quality Management Plan
Appendix A: Temperature Analysis
Appendix B: Abbreviations
Appendix C: Selected Terms
Download the entire document: Lower Grande Ronde Total Maximum Daily Load
Response to Public Comment

Forward looking infrared remote sensing survey reports

2000 Remote Sensing Survey of the Grande Ronde River Basin
Appendix A - Longitudinal Profiles
Appendix B - Selected Images

Contact

Trea Nance
Basin Coordinator
971-263-0841

Basin Coordinator List

Steve Mrazik
Watershed Management Manager
503-229-5379

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