Over time, the museum diversified to include diesel and steam-powered trains, buses, steamboats and associated buildings, papers and photographs.

The Museum of Lake Minnetonka was also created as a result of the split and assumed ownership and operating responsibilities of the restored Steamboat Minnehaha, which was built by TCRT in 1906.

Three restored streetcars formerly used by TCRT are used and the museum has built a replica 1900 station at the intersection of Queen Ave and 42nd Street.

The Line is operated on the former Minneapolis and Saint Louis Railway right-of-way now used by the Hennepin County Regional Railroad Authority as a bicycle trail.

78 is the oldest streetcar in the museum, having been built by LaClede Car Company of Saint Louis, Missouri in 1893.

The interior had been removed, so important pieces like the railroad trucks, the electric wiring and other parts had to be scavenged from other old streetcars or built from scratch.