Lock 20, Hennepin Canal

A colorful autumn day at lock 20 of the Hennepin Canal. This canal connected the Illinois River to the Mississippi River, and was the first major construction project in the United States to be entirely made out of concrete - not cut stone.

The canal was used from 1904 until 1951. There are plans to make 50 miles of the canal navigable again - including three or four locks.