National Geographic : 1946 Dec
Bonneville Dam Harnesses the Mighty Columbia to Produce 518,400 Kilowatts of Electricity inTen Generators The lock at right lifts ships 66 feet to by-pass the powerhouse. By the Bradford Island fish ladders (center) salmon pass around the obstruction ontheir way upstream to spawn. Other fishways go up the Washington side (left) and to the right of the lock on the Oregon bank. Two electric fish elevators areseldom used.