- Lake Washington Ship Canal (seattle.gov)
The grand opening of the Lake Washington Ship Canal was held on July 4, 1917. Designed by Seattle district engineer Hiram Chittenden of the U.S. Army Corps of Engineers, the canal’s construction was the result of more than five decades of discussion on how to connect the saltwater of Puget Sound to the freshwater of Lake Washington via Lake Union. Early planners envisioned heavy use by coal and naval vessels, but today the locks are predominantly filled with pleasure crafts. The City of Seattle’s role included engineering, legal, and public works projects as new bridges, roads, water supply infrastructure and more were required to accommodate the implications of the Ship Canal on Seattle’s shape and size. The exhibits below provide insight into how the Ship Canal shaped Seattle’s social, physical, and environmental history.
- Lake Washington Ship Canal (Seattle) (historylink.org)
The Lake Washington Ship Canal’s opening was celebrated on July 4, 1917, exactly 63 years after Seattle pioneer Thomas Mercer (1813-1898) first proposed the idea of connecting the saltwater of Puget Sound to the freshwater of Lake Washington via Lake Union. For five decades following Mercer’s suggestion, local citizens, business leaders, government officials, military officers, and entrepreneurs discussed where to build the connection and how to pay for it. Finally, after Hiram M. Chittenden (1858-1917) took charge of the Seattle District of the Army Corps of Engineers in 1906, plans were made and federal funding obtained. The ship canal Chittenden designed consisted of two cuts, the Fremont Cut between Salmon Bay and Lake Union and the Montlake Cut between Lake Union and Lake Washington, and a set of locks at the west end of Salmon Bay. The canal’s construction lowered the water level of Lake Washington by nine feet and raised that of Salmon Bay behind the locks, changing it from a tidal inlet to a freshwater reservoir.
- The Watershed | All about the Thornton Creek Watershed (thorntoncreekalliance.info)
Thornton Creek drains a 7,402-acre (11.6 sq. mile) urban watershed in northwestern King County. The Thornton Creek watershed extends roughly between Puget Sound and Lake Washington, extending from NE 190th St. in the City of Shoreline to NE 80th St in the City of Seattle. Thornton Creek enters Lake Washington at Matthews Beach Park, and Lake Washington drains by way of the Lake Washington Ship Canal to Puget Sound.
- Lake Washington Ship Canal (Wikipedia)
The Lake Washington Ship Canal, which runs through the city of Seattle, connects the fresh water body of Lake Washington with the salt water inland sea of Puget Sound. The Hiram M. Chittenden Locks accommodate the approximately 20-foot (6.1 m) difference in water level between Lake Washington and the sound. The canal runs east–west and connects Union Bay, the Montlake Cut, Portage Bay, Lake Union, the Fremont Cut, Salmon Bay, and Shilshole Bay, which is part of the sound.
