Hiram M. Chittenden (Ballard) Locks - U.S. Army Corps of Engineers

The Hiram M. Chittenden Locks, operated by the U.S. Army Corps of Engineers, regulate vessel passage between Puget Sound and the Lake Washington Ship Canal and manage water levels. The site includes lock machinery, control rooms, and maintenance areas that are federal infrastructure and have restricted access for operational and safety reasons. The Corps also operates fish ladder monitoring and related facilities adjacent to the public viewing areas.