Lake Washington Ship Canal

Chittenden Locks and Lake Washington Ship Canal
U.S. National Register of Historic Places
Location:	Salmon Bay, Seattle, Washington
Built/Founded:	1906
Architect:	Multiple
Architectural style(s):	Late 19th And 20th Century Revivals, Other
Governing body:	ARMY CORPS OF ENGINEERS
Added to NRHP:	December 14, 1978
NRHP Reference#:	78002751 [1]

The Lake Washington Ship Canal, which runs through the City of Seattle, Washington, connects the fresh water body of Lake Washington with the salt water inland sea of Puget Sound. The Ship Canal, includes a series of locks, model after the Panama Canal, to accommodate the different water levels between Lake Washington and the Sound. The Canal runs east/west, and connects Union Bay, Lake Union, the Montlake Cut, Portage Bay, the Fremont Cut, Salmon Bay, and Shilshole Bay, with the Sound, which empties into the Pacific Ocean. The project began in 1911 and was officially completed in 1934.

As early as 1854, there was discussion of building a navigable connection between the Lake Washington and Puget Sound for the purpose of transporting logs, milled lumber, and fishing vessels. Thirteen years later, the United States Navy endorsed a canal project, which included a plan for building a naval shipyard on Lake Washington. In 1891 the U.S. Army Corps of Engineers started planning the project. Some preliminary work was begun in 1906, and work began in earnest five years later. The delays in canal planning and construction resulted in the U.S. Navy building the Puget Sound Naval Shipyard in Bremerton, Washington, which located across the Sound from Seattle on the pennisula of Washington State.

The Canal's crossings, from east to west, are:

• the Montlake Bridge carrying Montlake Boulevard over the Montlake Cut,
• the University Bridge carrying Eastlake Avenue over Portage Bay,
• the Ship Canal Bridge carrying Interstate 5 over Portage Bay,
• the George Washington Memorial Bridge (commonly called the Aurora Bridge) carrying Aurora Avenue N. (State Route 99) over the west end of Lake Union,
• the Fremont Bridge connecting 4th Avenue N. to Fremont Avenue N. over the Fremont Cut,
• the Ballard Bridge carrying 15th Avenue over Salmon Bay,
• the BNSF Railway's Salmon Bay Bridge over Salmon Bay.

The Lake Washington Ship Canal and the Hiram M. Chittenden Locks are listed on the National Register of Historic Places. The Montlake Cut, along with the Montlake Bridge are City of Seattle Designated Landmarks (ID #107995).^[2]

Seattle's waterways in 1902, before the canal was built.	Seattle's waterways in the 1990s, showing the effect of the canal (and of other projects, such as the undergrounding of many streams and the re-routing, dredging, and industrialization of the Duwamish River). (The map remains essentially accurate as of 2009.)

Notes

v • d • e U.S. National Register of Historic Places Keeper of the Register · History of the National Register of Historic Places · Property types · Historic district · Contributing property List of entries National Park Service · National Historic Landmarks · National Battlefields · National Historic Sites · National Historical Parks · National Memorials · National Monuments

Coordinates: 47°38′35″N 122°20′05″W / 47.64319°N 122.33482°W / 47.64319; -122.33482