Skip to content

Bonneville Dam Fish Ladder Project 2008


When Manson Construction of Seattle was awarded the water portion of the Oregon Bonneville Dam Fish Ladder project they called on Northwest for equipment and expertise. Northwest engineered and had a special bracket manufactured  to hold the 32 meter placing boom atop of the anchors. The anchors consisted of a 26 prefabricated concrete vaults, which were then filled with 980 yards of concrete per vault. The vault then acted as the foundation footing for the twenty-seven foot high walls which formed the passage past the fish ladder.

Northwest provided a 32 meter Putzmeister placing boom, 1400 feet of pipeline, a 1409 trailer pump, and a 16 cell boom pump for the project.