Major Anthropogenic Physical Disturbance

Splash dams are considered “a menace” to salmon. State Fish Commissioner asks for a legal provision to control introductions of nonnative fish (Little 1901).

23
APR

0

1898

MAJOR ANTHROPOGENIC PHYSICAL DISTURBANCE

Washington Commissioner A.C. Little notes that extensive logging and splash dams are destroying salmon runs and stream beds.

23
APR

0

Major Anthropogenic Physical Disturbance

1896

Major anthropogenic physical disturbance

Columbia River: Cascades canal opened

25
JUN

0

Major Anthropogenic Physical Disturbance

1895

Major anthropogenic physical disturbance

Columbia River: South Jetty completed to a length of 7.25 kilometers (Hickson and Rodolf, 1950)

25
JUN

0

Major Anthropogenic Physical Disturbance

1892

Major anthropogenic physical disturbance

Columbia River: dredging 2-meeter deep channel from Portland to Lewiston completed

25
JUN

0

Major Anthropogenic Physical Disturbance

1885

Major anthropogenic physical disturbance

Columbia River: First pile dikes installed on lower Columbia River

25
JUN

0

Major Anthropogenic Physical Disturbance

1875

Major anthropogenic physical disturbance

Columbia River: dredging of 5-meter deep channel to Portland completed, deepening to 7-meters commences

25
JUN

0

Major Anthropogenic Physical Disturbance