Salmon Bay is a portion of the

Lake Washington Ship Canal 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 difference in ...

, which passes through the city of

Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region o ...

, linking

Lake Washington Lake Washington is a large freshwater lake adjacent to the city of Seattle. It is the largest lake in King County and the second largest natural lake in the state of Washington, after Lake Chelan. It borders the cities of Seattle on the west, ...

Puget Sound Puget Sound ( ) is a sound of the Pacific Northwest, an inlet of the Pacific Ocean, and part of the Salish Sea. It is located along the northwestern coast of the U.S. state of Washington. It is a complex estuarine system of interconnected m ...

, lying west of the Fremont Cut. It is the westernmost section of the canal and empties into Puget Sound's Shilshole Bay. Because of the Hiram M. Chittenden Locks, the smaller, western half of the bay is salt water, and the eastern half is fresh water (though not without saline contamination: see

Lake Union Lake Union is a freshwater lake located entirely within the city limits of Seattle, Washington, United States. It is a major part of the Lake Washington Ship Canal, which carries fresh water from the much larger Lake Washington on the east to P ...

). Before the construction of the Ship Canal, Salmon Bay was entirely

salt water Saline water (more commonly known as salt water) is water that contains a high concentration of dissolved salts (mainly sodium chloride). On the United States Geological Survey (USGS) salinity scale, saline water is saltier than brackish w ...

. East of the locks, Salmon Bay is spanned by the

Ballard Bridge The Ballard Bridge, also known as the 15th Avenue Bridge, is a double-leaf bascule bridge in Seattle, Washington. It carries 15th Avenue NW over Seattle's Salmon Bay between Ballard to the north and Interbay to the south. The Ballard Bridge foll ...

, a

bascule bridge A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- o ...

that carries 15th Avenue traffic between Ballard and Interbay. West of the locks, it is spanned by the

Salmon Bay Bridge The Salmon Bay Bridge, also known as Bridge No. 4, is a Strauss Heel-trunnion single-leaf bascule bridge spanning across Salmon Bay and connecting Magnolia/ Interbay to Ballard in Seattle, Washington. The bridge is located just west of Commodo ...

that carries the

BNSF Railway BNSF Railway is one of the largest freight railroads in North America. One of seven North American Class I railroads, BNSF has 35,000 employees, of track in 28 states, and nearly 8,000 locomotives. It has three transcontinental routes that ...

railroad tracks between Ballard and

Magnolia ''Magnolia'' is a large genus of about 210 to 340The number of species in the genus ''Magnolia'' depends on the taxonomic view that one takes up. Recent molecular and morphological research shows that former genera ''Talauma'', ''Dugandiodendr ...

Seattle - Chittenden locks and Salmon Bay Terminal circa 1919

References

Landforms of Seattle Bays of Washington (state) Bays of King County, Washington {{KingCountyWA-geo-stub