1894 referendum on consolidation. The eastern of Queens that became Nassau County was partitioned on January 1, 1899. Queens Borough was established on January 1, 1898. "The city of Long Island City, the towns of Newtown, Flushing and Jamaica, and that part of the town of Hempstead, in the county of Queens, which is westerly of a straight line drawn through the middle of the channel between Rockaway Beach and Shelter Island, in the county of Queens, to the Atlantic Ocean" was annexed to New York City, dissolving all former municipal governments (Long Island City, the county government, all towns, and all villages) within the new borough. The areas of Queens County that were not part of the consolidation plan, consisting of the towns of North Hempstead and Oyster Bay, and the major remaining portion of the Town of Hempstead, remained part of Queens County until they seceded to form the new Nassau County on January 1, 1899. At this point, the boundaries of Queens County and the Borough of Queens became coterminous. With consolidation, Jamaica once again became the county seat, though county offices now extend to nearby Kew Gardens also. In 1899, New York City conducted a land survey to determine the exact border of Queens between the Rockaways and Lawrence. This proved difficult because the border was defined as "middle of the channel between Rockaway Beach and Shelter Island" (now called Long Beach Island), and that particular channel had closed up by 1899. The surveyors had to determine where the channel had been when the consolidation law was written in 1894. The surveyors did so in part by speaking with local fishermen and oystermen who knew the area well. From 1905 to 1908 the Long Island Rail Road in Queens became electrified. Transportation to and from Manhattan, previously by ferry or via bridges in Brooklyn, opened up with the Queensboro Bridge finished in 1909, and with railway tunnels under the East River in 1910. From 1915 onward, much of Queens was connected to the New York City Subway system. With the 1915 construction of the Steinway Tunnel carrying the IRT Flushing Line between Queens and Manhattan, and the robust expansion of the use of the automobile, the population of Queens more than doubled in the 1920s, from 469,042 in 1920 to 1,079,129 in 1930. In later years, Queens was the site of the 1939 New York World's