Confluence of Bumping and Deadman Creeks.  Photo courtesy of Spokane County Conservation District.

Technical Information

Unless otherwise specified, the following reports are Ecology publications.

Little Spokane River Watershed Fecal Coliform Bacteria, Temperature, and Turbidity Total Maximum Daily Load: Water Quality Improvement Report
This total maximum daily load (TMDL) evaluates and identifies sources of fecal coliform bacteria, temperature, and turbility pollution problems in the Little Spokane River watershed and recommends ways to reduce or remove them. This assessment coincides with the recently completed Spokane River/Lake Spokane dissolved oxygen TMDL and the Hangman Creek fecal coliform, temperature, and turbidity TMDLs. Completing this first set of LSR watershed TMDLs provides an area-wide approach to pollutant reduction needed for water quality concerns identified in the Spokane River basin.

WSU Sampling Progress for Ecology Presentation (PDF)

Water quality sampling is an essential part of a TMDL. This presentation provides  information about methods and results of the current water quality sampling project for the Little Spokane River TMDL.

Quality Assurance Project Plan: Little Spokane River Watershed Total Maximum Daily Load Study
In 2005, the Washington Water Research Center (WWRC) and Washington State University (WSU) contracted with the Washington State Department of Ecology (Ecology) Environmental Assessment Program to conduct a set of water quality surveys and analytical assessments of the Little Spokane River. Data from the surveys would be used for temperature, fecal coliform, turbidity, and phosphorus Total Maximum Daily Load evaluations.

Quality Assurance Project Plan: Little Spokane River Watershed Dissolved Oxygen and pH Total Maximum Daily Load Study: Water Quality Study Design
Several areas of the Little Spokane River are on Washington State’s list of polluted waters (303(d) list) and require a cleanup plan, or total maximum daily load (TMDL). The Washington Water Research Center and Washington State University identified several key factors contributing to dissolved oxygen and pH criteria violations in the watershed, based on data collected from 2004 to 2006. Additional data are needed to address dissolved oxygen and pH 303(d) listings in the Little Spokane River watershed. The Washington State Department of Ecology (Ecology) will conduct two intensive synoptic surveys in the summer of 2010 to address the potential sources of nutrients and other factors affecting dissolved oxygen and pH in the Little Spokane River watershed. Each study conducted by Ecology must have an approved Quality Assurance Project Plan.

Data Summary Report: Little Spokane River Dissolved Oxygen and pH Total Maximum Daily Load Study and Little Spokane River Fish Hatchery Water Quality Monitoring for Nutrients
Summary of field and laboratory water quality data and flow data collected by the Department of Ecology and the Spokane County Conservation District during 2010 for the Little Spokane River Dissolved Oxygen/pH TMDL study.

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Last updated July 2013