WA State Pages:
The WA state government page dedicated to COVID-19 with news and guidance is found at: https://coronavirus.wa.gov/. There is a page specifically for Business & Workers: https://coronavirus.wa.gov/business-workers.
The Governor also has a page showing coronavirus resources: https://www.governor.wa.gov/issues/issues/covid-19-resources. (The Latest News section shows any action related to the issue, including the recent Phase Appropach reopening plan.)