At the time of its completion, it had the longest cantilever span in the United States.

It was designed by Joseph Strauss, the engineer of the Golden Gate Bridge.

[4] A feasibility study commissioned by the Washington State Legislature in 1990 recommended the construction of a second bridge to handle future traffic volume.

[5] The Lewis and Clark Bridge was closed for four days in July 2023 to replace a floor beam and install new finger joints; during the closure, which was originally scheduled for eight days, the Wahkiakum County Ferry was used as a detour route for prioritized traffic.

[6] Media related to Lewis and Clark Bridge at Wikimedia Commons