A bill to modify the navigation project on the Cowlitz River, Washington, to authorize the Secretary of the Army to implement interim measures to control floods in the lower Cowlitz River area and improve navigation on the Columbia River.

Modifies Federal law to authorize the Secretary of the Army, acting through the Chief of Engineers, to implement and maintain flood control measures on the Cowlitz and Toutle Rivers by dredging or other necessary means.

Authorizes the Chief of Engineers to reduce sedimentation flow and the chance of blockage on the Columbia River, Washington.

Declares that such authorization shall remain in effect until certain permanent measures are fully implemented.