US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-563 — INSTREAM RESOURCES PROTECTION PROGRAM FOR THE MAIN STEM COLUMBIA RIVER IN WASHINGTON STATE173-563-030WAC 173-563-030WAC 173-563-030. AuthorityLast amended: 1980Year: 2026Length: 22 wordsOfficial source These rules are adopted under the authority of chapters 90.54 , 90.22, and 90.03 RCW, and in relation to chapter 173-500 WAC.PreviousWAC 173-563-020NextWAC 173-563-040