Migration is blocked. Historic habitat is flooded. Flow is reduced.
Water is warmer .
The Bull Run River is a drinking water resource used by 25 percent of all Oregonians. Learning to share the Bull Run River with these fish is an important priority for the City of Portland. The Bull Run River is a major tributary of the Sandy River. The Bull Run River Basin makes up about 25 percent of the 500 square mile Sandy River Basin. Wild populations of steelhead and Chinook have declined 75-90 percent in the Sandy River Basin.