Illinois Waterway, La Grange Lock and Dam, 3/4 mile south of Country 795N at Illinois River, Versailles, Brown County, IL
Significance: La Grange Lock and Dam is significant as a component of the Illinois Waterway, which was developed to provide a navigable route from Lake Michigan to the Mississippi River and beyond. La Grange Dam is significant as one of the few surviving examples of a dam with Chanoine wicket gates in this country.
Survey number: HAER IL-164-A
Building/structure dates: 1936-1939 Initial Construction
Building/structure dates: after. 1970- before. 1979 Subsequent Work
Building/structure dates: 1984 Subsequent Work
Building/structure dates: 1990 Subsequent Work
National Register of Historic Places NRIS Number: 04000170