The second is the Mackinac Bridge that connects Michigan's two peninsulas at the Straits of Mackinac. A structure was first proposed in 1888 by one of the directors of the Grand Hotel on Mackinac Island. Car ferry service was started in 1923 to cross the straits, and a bridge authority was first created in 1934 to investigate the possibility of building a permanent connection across the straits. This early authority started with a 1921 proposal for a series of bridges that would have connected Cheboygan to St. Ignace by way of Bois Blanc, Round, and Mackinac islands. The federal Public Works Administration rejected loan and grant requests for that project. A second, direct crossing was then proposed based on designs used for the Tacoma Narrows Bridge. The collapse of that bridge and World War II delayed any further work on a structure beyond tests of the lake bottom and the construction of the causeway on the St. Ignace side; the first bridge authority was abolished in 1947. The current agency was created on June 6, 1950.