US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-545 — INSTREAM RESOURCES PROTECTION PROGRAM—WENATCHEE RIVER BASIN, WATER RESOURCE INVENTORY AREA (WRIA) 45173-545-160WAC 173-545-160WAC 173-545-160. MapLast amended: 2008Year: 2026Length: 27 wordsOfficial source For the purposes of administering this chapter, the boundaries of the Wenatchee River basin identified in the figure below are presumed to accurately reflect the basin hydrology.PreviousWAC 173-545-150