Department of
Environmental Quality

Subbasin Assessments and Total Maximum Daily Loads

Listed below are subbasins in which subbasin assessments (SBAs) and/or total maximum daily loads (TMDLs) have been completed for water bodies in DEQ's Lewiston Region. Click on the subbasin name to link to an overview of water quality in the subbasin, a list of streams and pollutants for which TMDLs were developed, and related documents, including subbasin assessments and TMDLs, addenda, implementation plans, and five-year reviews. (Access the statewide list of SBAs/TMDLs here.)

• Clearwater River, North Fork (Upper) Subbasin
• Clearwater River, North Fork (Lower) Subbasin
• Clearwater River, South Fork Subbasin
• Cottonwood Creek Subbasin
• Cow Creek Subbasin
• Hatwai Creek Subbasin
• Jim Ford Creek Subbasin
• Lindsay Creek Subbasin
• Lochsa River Subbasin
• Lolo Creek Tributaries Subbasin
• Palouse River Tributaries Subbasin
• Palouse River, South Fork Subbasin
• Paradise Creek Subbasin
• Potlatch River Subbasin
• Salmon River (Lower) and Hells Canyon Subbasins
• Selway River (Lower) Subbasin
• Tammany Creek Subbasin
• Winchester Lake - Lapwai Creek (Upper) Subbasin

Ground Water Studies and Reports

• A Reconnaissance of Nitrite/Nitrate in Camas Prairie Groundwater, Vol. 1, Lewis and Idaho County, Idaho (Technical Report 12. September 1998)
• Camas Prairie Nitrate Priority Area: Groundwater Monitoring Results (Technical Report 29. January 2008)
• Clearwater Plateau Nitrate Groundwater Data Analysis (Technical Report 20. 2003)
• A Reconnaissance of Ground Water Nitrite/Nitrate in the Cow Creek Watershed, Volume I of II (Technical Report 18. August 2001)
• A Reconnaissance of Subsurface Tile Drain Ground Water in the Cow Creek Watershed, Latah and Nez Perce County, Idaho (Technical Report 22. April 2003)
• Ground Water Quality Evaluation, Craigmont, Idaho (February 2001)
• Well CM-1 Evaluation, Craigmont, Idaho (Technical Report 30. December 2007)
• Ground Water Quality Investigation and Wellhead Protection Study, Ferdinand, Idaho (Technical Report 15. July 2000)
• Isotopic Age Dating of Municipal Water Wells in the Lewiston Basin, Idaho (Technical Report 24. August 2005)
• Moscow Basin Ground Water Quality Study (Technical Report 7. October 1995)
• Russell Sole Source Aquifer Ground Water Monitoring (Technical Report 9. March 1997)

Surface Water Studies and Reports

• Chiwawa River Case Study: Application of New Approaches to Water Quality Temperature Criteria | Appendices (March 2002)
• Clearwater River, South Fork, A Recreational Suction Dredge Mining Water Quality Study on (January 2003)
  
• Jordan Creek and Non-Jordan Creek Sites: Analysis of Total Mercury Concentrations in Fish Samples (November 2009)
• Water Temperature of the Lochsa River and Selected Tributaries (July 2002)
• Lochsa River Basin Temperature Guidance Pilot Project Clearwater Subbasin (August 2005)
• Lucas Lake Beneficial Use Assessment and Reconnaissance Metals Monitoring (August 2002)
• Supplemental Watershed Protection Plan - Environmental Assessment Supplement No. 2 Mission-Lapwai Creek Watershed Lewis and Nez Perce Counties, Idaho (December 2000)
• Effects of the 1995/96 Floods on Streams in North Central Idaho (1998)
• Paradise Creek Use Attainability Assessment (January 1994)
• Threemile Creek Beneficial Use Assessment, Idaho County, Idaho (August 2008)