Today in Washington State History From Spokane's Division Street Bridge collapses on December 18, 1915. <i>East Side Journal</i> prints high school student Alice Grubner's essay on freedom on December 18, 1941. College Place votes for incorporation on December 18, 1945. The Dalles Bridge spanning the Columbia River is completed on December 18, 1953. Staff Sergeant John M. Horan, U.S. Army, is lost in the Cascade Mountains on December 18, 1955. Officer Nicholas N. Davis is murdered by a mentally disturbed drifter on December 18, 1984. Amgen agrees to buy Immunex, Seattle's largest biotech firm, on December 18, 2001.