Total Maximum Daily Loads

Positive actions are being undertaken and accomplished to improve water quality in the Klamath River and its tributaries. We appreciate your interest and involvement. Together we can work towards a better river environment for everyone.

 

Current actions

DEQ issues revised Klamath and Lost River Total Maximum Daily Load

 
The Upper Klamath and Lost River TMDL was first issued in May 2010. At that time the U.S. Environmental Protection Agency approved all of the components of the TMDL except for temperature. During this time it was also noted that seven entities affected by the TMDL in Klamath County petitioned the DEQ director to reconsider various components of the TMDL. The director granted the reconsideration based on these petitions.
 
DEQ responded to reconsideration petitions and released a draft modified TMDL for public review and comment in April 2017. Following this public review and comment period, DEQ issued the modified nutrient TMDL and submitted to EPA for approval in December 2017.

 

Upper Klamath EPA Submittal Letter
Upper Klamath and Lost River Subbasins TMDL
Upper Klamath Order Memo
Upper Klamath Response to Comments
Upper Klamath Response to Petitions
Appendix A: Data Review and Modeling Approach
Appendix B: Klamath River Model for TMDL Development
Appendix C: Klamath River Model Scenarios Summary
Appendix D: Sediment Oxygen Demand Report
Appendix E: Aquatic Vegetation Report
Appendix F: Lost River Model for TMDL Development
Appendix G: Klamath River Model Results (Columbia Forest Company)
Appendix H: Seasonal Wasteload Allocations
Appendix I: EPA Upper Klamath Memo to File (Ammonia Toxicity)
Appendix J: Upper Klamath Ammonia Toxicity Calculations
Appendix K: Upper Klamath Updated Load Applications

 

​Butte Subbasin

TMDL Not Started (Minimal or no activity)

Upper Klamath Lake Drainage: Sprague, Upper Klamath Lake and Williamson Subbasins

TMDL approved by the U.S. Environmental Protection Agency on Aug. 7, 2002

     Supporting Documentation:

Upper Klamath and Lost River Subbasins

TMDL issued by DEQ and submitted to EPA for approval on Dec. 21, 2010.

Memorandums of Agreement

Forward looking infrared remote sensing survey reports

​Contact

Klamath Basin Coordinator:
Mike Hiatt, Klamath Falls
541-273-7002