Lower Granite Dam Snake River

Since 1975 adult salmon primarily chinook and steelhead have been trapped and sampled at lower granite dam on the snake river located in southeast washington.

Lower granite dam snake river.

Lower granite lock and dam is a concrete gravity run of the river dam in the northwest united states. Lower granite dam was the final dam in the project. 746 5 feet powerhouse capacity. 6 135 mw 810 mw total overload capacity.

Lower granite dam is 3 200 feet long making it the second longest dam of the four dams completed along the lower snake river between 1961 and 1975. Transport began in the late 1960 s as a research program on how to. That will happen again this year. Directly below the confluence the river flows into lower granite lake formed by lower granite dam the uppermost dam of the lower snake river project.

Construction began in 1965 and three. The lower granite dam which bridges garfield and whitman county was named for granite point located about six miles upstream toward clarkston from the dam. Army corps of engineers walla walla district normal operating pool 1. On the lower snake river in southeastern washington it bridges whitman and garfield counties.

As the first collector dam on the snake river lower granite is a primary component of the juvenile fish transportation program. Preliminary construction started on the dam in july 1965 and proceeded smoothly in the early years. Opened 45 years ago in 1975 the dam is located 22 miles 35 km south of colfax and 35 miles 56 km north of pomeroy. 733 0 738 0 feet maximum pool 1.

River mile 107 5 constructed. 2020 steelhead count from july 1 to december 31 2020 to view winter passage at bonneville dam go to. 6 155 3 mw 932 mw total. Paradoxically the combination of these factors gives the young salmon further time to grow and to feed in lower granite lake so when they begin the migration to the pacific ocean they often have a higher chance at survival compared to those salmon who migrate to the ocean earlier.