OAR 635-500-1610. Tualatin Subbasin Fish Management — Habitat

It is the objective of the Department to: (1) Maintain and improve upstream and downstream passage for anadromous fish at dams, water diversions, other manmade obstacles, existing fishways and, where appropriate, at natural barriers. (2) Protect existing streamflows and water quality from degradation associated with operation of dams, water diversions, effluents, mining, recreation and other in-stream activities. (3) Inventory stream and watershed characteristics that affect fish production.