US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-500 — WATER RESOURCES MANAGEMENT PROGRAM ESTABLISHED PURSUANT TO THE WATER RESOURCES ACT OF 1971173-500-030WAC 173-500-030WAC 173-500-030. AuthorityLast amended: 1988Year: 2026Length: 16 wordsOfficial source This regulation is promulgated by the department of ecology under the authority of chapter 90.54 RCW.PreviousWAC 173-500-020NextWAC 173-500-040