22B0005_Plans.pdf

This document outlines a federal construction solicitation issued by the U.S. Army Corps of Engineers Walla Walla District. The solicitation, numbered W912EF22B0005, is for a navigation channel maintenance dredging project located on the Snake and Clearwater Rivers near Lewiston, Idaho and Clarkston, Washington. Additionally, some dredging will take place on the Lower Snake River downstream of Ice Harbor Dam. The Corps proposes to dredge the navigation channels to a minimum depth of 14 feet measured at minimum operating pool in 2022/2023 to safely accommodate large boats and barges. Dredging will take place at four locations and include two access channels between the Port of Clarkston docks and the federal navigation channel. The dredging is authorized under the Flood Control Act of 1952 to maintain a minimum 14 foot depth, with dredging planned to a depth of up to 16 feet to account for one foot of advanced measures and one foot of dredging inaccuracy.