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Implementation of Cool Water Species Criterion for Klamath River Sucker, March 2017
Temperature Water Quality Standard Implementation IMD - April 2008
Memo from DEQ to EPA clarifying Oregon's water temperature standards, Feb. 4, 2004
Memo from DEQ to EPA clarifying Oregon's water temperature standards, June 22, 1998
Memo from DEQ to EPA clarifying Oregon's water temperature standards, Dec. 19, 2003
Summary of EPA's Temperature Guidance
EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards, April 2003
EPA Region 10's Water Temperature Standard Guidance Supporting Documents
On Aug. 8, 2013, EPA disapproved the natural conditions criterion contained in Oregon’s water quality standard for temperature. EPA also disapproved the general natural conditions criterion contained in Oregon’s statewide narrative criteria, which applied to other naturally occurring substances and conditions of water. See the “Questions and Answers” and the EPA action letter below for additional information.
Disapproved rule provisions shown in blackout. These provisions are no longer effective for federal Clean Water Act purposes.
EPA letter of action on Oregon Water Quality Standards Actions
Questions and Answers on EPA Water Quality Standard Actions
Stipulated Order on Narrative Criteria and Antidegradation - April 10, 2013
Stipulated Order on Nonpoint Source and ESA Remedies - Jan. 7, 2013
Court Opinion, Feb. 28, 2012
DEQ completed a study of the availability and sufficiency of cold-water refuge to support salmon and steelhead migration in the lower 50 miles of the Willamette River. The Lower Willamette CWR study assesses Oregon’s cold-water refuge narrative criteria to address the jeopardy decision and reasonable and prudent alternatives from the 2015 National Marine Fisheries Service Biological Opinion on the EPA approval of Oregon’s 2003 water temperature standards, with an emphasis on CWR to support migration of threatened and endangered salmon and steelhead populations.
DEQ’s study identifies the location, source, and levels of use of CWR habitat available to adult and juvenile Upper Willamette River spring chinook, Upper Willamette River winter steelhead, Lower Columbia River Chinook, and Lower Columbia River winter steelhead populations that migrate through the designated migration corridor.
DEQ submitted the study to NMFS on March 18, 2020.
NOAA Letter Confirming Satisfaction of Cold Water Refuge RPA Requirements, Dec. 7, 2020
EPA Submission Letter for Lower Willamette and Columbia River CWR Studies to NOAA , Dec. 18, 2020
Lower Willamette Cold Water Refuge Interpretation Study, March 18, 2020
Presentation slides from the draft study stakeholder preview, Jan. 31, 2020
GIS Shapefile of Cold-Water Refuge Locations
Debra SturdevantWater Quality Standards Coordinator503-229-6691
James McConaghieWater Quality Standards Program503-229-5619
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