Chapter 173-201A WAC (Chelan UAA)
We adopted amendments to chapter 173-201A WAC - Water Quality Standards for Surface Waters of the State of Washington.
We adopted changes to the the following sections:
- WAC 173-201A-020 (Definitions)
- WAC 173-201A-440 (Use attainability analysis)
- WAC 173-201A-602 (Table 602—Use designations for fresh waters by water resource inventory area (WRIA)) to change the designated use and requirements for temperature and dissolved oxygen levels in the water for the Chelan River
We made changes to the aquatic life designated use of salmonid spawning, rearing, and migration on the Chelan River using a use attainability analysis (UAA). A UAA is an approved water quality tool in Washington’s surface water quality standards (WAC 173-201A-440) and is used for removing or revising a designated use for a water body only if that use is not existing or attainable. A UAA is a scientific assessment of the physical, chemical, biological, and economic factors that may affect the attainment of the use.
Rulemaking timeline
Announcement phase (CR-101)
Filing date:
Oct. 27, 2020
Announcement documents
- Announcement Notice – CR-101 form
- Chelan PUD Use Attainability Analysis cover letter, Dec. 20, 2019
- Chelan River Use Attainability Analysis report
- Ecology letter to Chelan Public Utility District, Feb. 18, 2020
Rule development phase
Oct. 27, 2020 - Spring 2021Rule proposal phase (CR-102)
March 24, 2021
- Proposal notice - CR-102 form
- Proposed rule language
- Overview of proposed rule changes
- Preliminary Regulatory Analyses
- SEPA - Determination of Nonsignificance
- Draft Technical Support Document
- Draft Implementation Plan
Comment period
We held a public comment period from March 24 to May 21, 2021.
Public Hearings
We held public hearings via webinar on May 11 and May 15, 2021. During the public hearings, we presented our proposed changes, answered any questions, then held the formal hearing to receive oral comments. See above for documents related to the Proposal Phase of the rulemaking.
Rule adoption phase (CR-103)
Sept. 17, 2021
Oct. 18, 2021
Related links
Contact information
Marla Koberstein
Rulemaking Lead
swqs@ecy.wa.gov
360-407-6413
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Accessibility
To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831. People with impaired hearing may call Washington Relay Service at 711. People with speech disability may call TTY at 877-833-6341.