Dec. 2, 2019 - Fall 2021
Science Advisory Group meetings
The purpose of the science advisory group is to discuss the scientific literature on the impacts of intragravel dissolved oxygen and fine sediment on salmonid spawning. This group also discussed the different measures that can be used to determine if excess fine sediment is contributing to poor habitat quality.
Ecology hosted five online advisory group meetings between Oct. 29, 2020, and July 27, 2021. Participants include Ecology staff and external stakeholders with expertise in habitat protection and implementation of related criteria.
Read a summary of the Science Advisory Group, including participant information and notes from each meeting.
Sept. 21, 2021: Webinar on Preliminary Rule Proposal
View Sept. 21, 2021 presentation slides (pdf)
We held an informational webinar to preview what we are considering for the upcoming rule proposal.
During this webinar, we presented:
- Reasons for revising the freshwater dissolved oxygen criteria and adding a new fine sediment criterion
- Preliminary draft rule changes
- The science behind the preliminary decisions for this rule
- A review of the rulemaking timeline and next steps
October 8, 2020: Webinar on the Salmon Spawning Habitat Protection Rule
View presentation slides (pdf)
The purpose of this webinar is to provide background information on the rule and discuss our process for rule development.
We covered the following topics during this webinar:
- Overview of Washington's surface water quality standards
- The science behind this rulemaking
- The current freshwater dissolved oxygen and narrative criteria
- Reasons for revising the water quality standards
- Preliminary options and considerations for criteria development
- Formation of a science advisory group
- Considerations for implementing the rule
- Tentative rulemaking timeline