Temperature TMDL Replacement Project

DEQ has begun a project to revise multiple temperature TMDLs that were issued by DEQ and approved by EPA between 2004 and 2010. DEQ is under a court order to update and replace these temperature TMDLs to make them consistent with the current temperature standards. These TMDLs must be updated because they were based, in part on the Natural Conditions Criterion, a section of the temperature standard that was subject to litigation and has since been disapproved by EPA.

The following temperature TMDLs are being replaced:

• Applegate Subbasin TMDL and Water Quality Management Plan (2004)
• Snake River-Hells Canyon TMDL (2004)
• Sandy River Basin TMDL (2005)
• Walla Walla Subbasin Stream Temperature TMDL and WQMP (2005)
• Umpqua Basin TMDL and WQMP (2006)
• Willamette Basin TMDL and WQMP (2006)
• Bear Creek Watershed TMDL (2007)
• Willow Creek Subbasin Temperature TMDL and WQMP (2007)
• Middle Columbia-Hood (Miles Creeks) Subbasin TMDL and WQMP (2008)
• Molalla-Pudding Subbasin TMDL and WQMP (2008)
• Rogue River Basin TMDL (2008)
• John Day River Basin TMDL and WQMP (2010)
• Lower Grande Ronde Subbasins TMDLs (2010)
• Malheur River Basin TMDL and WQMP (2010)

Additionally, DEQ is updating the following TMDLs for temperature for the Rogue River Basin:

• Upper Sucker Creek TMDL (1999)
• Lower Sucker Creek TMDL (2002)
• Lobster Creek Watershed TMDL (2002)
  

Visit DEQ's TMDL page for more information on what TMDLs are and what they include.