Various proposals for a rapid transit system in Seattle, to replace the streetcar—and later bus—networks, were presented in the 20th century and rejected by city officials or voters due to their cost or other factors. In 1911, urban planner Virgil Bogue proposed a system of subway tunnels and elevated railways as the centerpiece to a comprehensive plan for the city, which was rejected by voters. The Seattle Center Monorail, originally built for the 1962 World's Fair, has been the subject of several unsuccessful expansion proposals backed by Governor Albert Rosellini in the 1960s and Seattle voters in the early 2000s. The Forward Thrust Committee of the late 1960s proposed a rapid transit system, to connect Downtown Seattle to Ballard, the University District, Lake City, Capitol Hill, Bellevue, and Renton. The federal government offered to fund two-thirds of the rail system's capital costs, approximately $770 million (equivalent to $ in dollars), if $385 million (equivalent to $ in dollars) in local property taxes were approved by voters. The rapid transit initiative was placed on the ballot in February 1968, but failed to receive the necessary supermajority to pass. A second attempt in May 1970, with $440 million (equivalent to $ in dollars) in local funding and $870 million (equivalent to $ in dollars) in federal funding, failed amid a local economic downturn caused by layoffs at Boeing. The federal funding earmarked towards the rapid transit system was granted to Atlanta, Georgia, forming the initial funding for the Metropolitan Atlanta Rapid Transit Authority's rail system.