Today in Washington State History From The International Boundary Commission first meets on June 27, 1857. Newspaper notice seeks participation in organizing local YMCA on June 27, 1876. Woodinville beginnings: Woodinville Post Office opens June 27, 1881. Mount Vernon voters approve city incorporation on June 27, 1890. Jordan Valley (Snohomish County) school is authorized on June 27, 1891. Spokane's second Monroe Street Bridge, a steel bridge, is completed on June 27, 1892. Vincent Beginnings: Vincent Post Office opens on June 27, 1894. L. Guy Mecklem makes Seattle's first airship ascent at Luna Park on June 27, 1908. Seattle's Montlake Bridge spanning Montlake Cut opens on June 27, 1925. Explosions at the J. A. Denn Powder Company, in Hawk's Prairie near Lacey, kill 10 and injure seven on June 27, 1934. Chelan County Historical Society opens a museum in Cashmere to preserve Willis Carey's artifacts on June 27, 1959. Seattle Symphony Orchestra hires Gerard Schwarz as principal conductor on June 27, 1984. Lusty Lady, irreverent Seattle landmark, closes on June 27, 2010.