The United States mandated the medical inspection of all arriving immigrants in 1891. The Columbia River Quarantine Station in Knappton Cove, Washington, established 1899, was one of four points of entry on the west coast for immigrants coming to America. Thousands of European and Asian immigrants underwent health inspections at the station

Biographies, Columbia River Quarantine Station (Knappton, Wash.), Emigration and immigration, Historic sites, Historic sites Washington (State), History, Immigrants, Immigrants Washington (State) Knappton History, Knappton (Wash.) Biography, Knappton (Wash.) History, Quarantine, Quarantine Washington (State) Knappton, Washington (État) Émigration

Nancy Bell Anderson published the article "The Bells at Knappton Cove : 1950-1967" in The Sou'wester, Spring 2001 which is a brief history of her family and Knappton Cove and includes some of the information found in The Columbia River's "Ellis Island." The article is available online

Nancy Bell Anderson published the article "The Bells at Knappton Cove : 1950-1967" in The Sou'wester, Spring 2001 which is a brief history of her family and Knappton Cove and includes some of the information found in The Columbia River's "Ellis Island." The article is available online