Spokane River TMDL- Technical Information

Washington State Department of Ecology

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Technical Information

The Department of Ecology contracted with the Army Corps of Engineers to develop a water quality computer model for the Spokane River and Lake Spokane. The model used data obtained from recent and past studies. Ecology used this model to predict water quality changes in response to various modeling scenarios. The model and its predictions were used to establish a total maximum daily load (TMDL) for pollutants that affect dissolved oxygen in the Spokane River and Lake Spokane.

The modeling results and the Foundational Concepts for the Spokane River TMDL Managed Implementation Plan have been incorporated into a revised Spokane River DO TMDL in 2007.

2007 Draft Dissolved Oxygen TMDL Report Development:

Study and Modeling Links:

Spokane River and Lake Spokane (Long Lake) Pollutant Loading Assessment for Protecting Dissolved Oxygen (Cusimano, 2004)
www.ecy.wa.gov/biblio/0403006.html
- Spokane River and Lake Spokane Total Maximum Daily Load Study, Data Summary Report, Ecology (Ecology Publication)
  www.ecy.wa.gov/biblio/0303023.html
- Spokane River and Lake Spokane Total Maximum Daily Load Study, Data Summary Report - data appendix (zipped files) (Ecology Publication)
  www.ecy.wa.gov/pubs/0303023.zip
- Response to comments on Pollutant Loading Assessment report (Cusimano, 2004)
Spokane River - Lake Spokane CE-QUAL-W2 Modeling
- Portland State University Spokane Modeling Website (external)
- Portland State University May 2007 Technical Memo (PDF)
- Portland State University August 2007 Technical Memo (PDF)

2004 Draft Dissolved Oxygen TMDL Report Development:

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Last updated May 2008