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Water Quality Improvement Projects (TMDLs)

WRIA 35: Middle Snake

The following table lists overview information for water quality improvement projects (including total maximum daily loads, or TMDLs) for this water resource inventory area (WRIA). Please use links (where available) for more information on a project.



Waterbody Name Pollutant(s) Status** TMDL Lead
Pataha Creek Ammonia-N
BOD (5-day)
EPA approved David T. Knight
Snake River, Middle
  • Clearwater River to Palouse River
Total Dissolved Gas EPA approved

Implementation in progress

Chad Brown
Tucannon-Pataha Creeks Fecal Coliform   David T. Knight
Temperature Streamlined TMDL

EPA approved


** Status will be listed as one of the following: Approved by EPA, Under Development or Implementation

For more information about WRIA 35:

* The Department of Ecology and other state resource agencies frequently use a system of 62 "Water Resource Inventory Areas" or "WRIAs" to refer to the state's major watershed basins.

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Last updated March 2016