{"name":"Lake Washington Ship Canal","city":"Seattle, Washington","canonical_url":"https://gydeinfo.com/seattle/places/lake-washington-ship-canal/","markdown_url":"https://gydeinfo.com/seattle/places/lake-washington-ship-canal.md","updated_at":"2026-06-20T18:58:45.573457+00:00","facts":[{"claim":"Early planners expected heavy use by coal and naval vessels, but today the locks are mainly used by pleasure craft.","citation":"https://www.seattle.gov/city-archives/exhibits-and-education/online-exhibits/lake-washington-ship-canal","source_title":"Lake Washington Ship Canal - City Archives","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T17:43:47.546868+00:00","fact_type":"anecdote","as_of":"2024","confidence":0.88},{"claim":"The ship canal influenced Seattle's social, physical, and environmental history.","citation":"https://www.seattle.gov/city-archives/exhibits-and-education/online-exhibits/lake-washington-ship-canal","source_title":"Lake Washington Ship Canal - City Archives","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T17:43:47.546868+00:00","fact_type":"significance","as_of":"2024","confidence":0.93},{"claim":"The locks and canal contribute to industrial, municipal, commercial, environmental, and recreational development in the area.","citation":"https://www.nws.usace.army.mil/Media/Fact-Sheets/Fact-Sheet-Article-View/Article/1493303/fact-sheet-lake-washington-ship-canal/","source_title":"FACT SHEET: Lake Washington Ship Canal","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T17:43:46.669089+00:00","fact_type":"significance","as_of":"2024","confidence":0.96},{"claim":"The locks receive more than 1 million visitors per year.","citation":"https://www.nws.usace.army.mil/Media/Fact-Sheets/Fact-Sheet-Article-View/Article/1493303/fact-sheet-lake-washington-ship-canal/","source_title":"FACT SHEET: Lake Washington Ship Canal","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T17:43:46.669089+00:00","fact_type":"capacity","as_of":"2024","confidence":0.93},{"claim":"The complex is located 1.5 miles east of the Puget Sound entrance and includes a dam, spillway, fish ladder, gardens, visitors’ center, and two navigation locks.","citation":"https://www.nws.usace.army.mil/Media/Fact-Sheets/Fact-Sheet-Article-View/Article/1493303/fact-sheet-lake-washington-ship-canal/","source_title":"FACT SHEET: Lake Washington Ship Canal","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T17:43:46.669089+00:00","fact_type":"location","as_of":"2024","confidence":0.94},{"claim":"Construction began in 1911 on an eight-mile channel connecting Puget Sound to Lake Washington and Lake Union.","citation":"https://www.asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/lake-washington-ship-canal-and-hiram-m-chittenden-locks","source_title":"Lake Washington Ship Canal & Hiram M. 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Chittenden Locks are described by ASCE as the largest and most heavily used locks on the West Coast, with dual-sized chambers designed to conserve water and reduce saltwater intrusion.","citation":"https://www.asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/lake-washington-ship-canal-and-hiram-m-chittenden-locks","source_title":"Lake Washington Ship Canal & Hiram M. Chittenden Locks","source_type":"manual","allowed_use":"facts_with_citation","retrieved_at":"2026-06-20T17:43:45.757107+00:00","fact_type":"significance","as_of":"2024","confidence":0.9},{"claim":"ASCE says the project transformed Seattle into a major metropolitan port city.","citation":"https://www.asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/lake-washington-ship-canal-and-hiram-m-chittenden-locks","source_title":"Lake Washington Ship Canal & Hiram M. 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