The reclamation of vast tracts of desert into productive farmland practically overnight led to the regional moniker of "Magic Valley". Powered entirely by gravity, it was "a rare successful example" of private irrigation development under the Carey Act. The city of Twin Falls was incorporated in 1905, on lands originally platted for town development as part of the irrigation project. In 1913, Perrine built an electric streetcar system to transport tourists from Twin Falls to the Shoshone Falls. In part due to the intervention of World War I which resulted in short supply of iron, the rail line was never completed as planned. The post-war rise in automobile ownership also made the line obsolete, and it was de-commissioned in 1916.