La Grange Lock and Dam, Navigation lock and embankment dam on Illinois River, Brown County, United States.
The La Grange Lock and Dam spans 1,066 feet across the Illinois River, featuring a lock chamber measuring 110 by 600 feet to regulate water levels.
The U.S. Army Corps of Engineers completed the construction of this navigation infrastructure between 1936 and 1939 to accommodate nine-foot channel depths.
The National Register of Historic Places recognized this engineering structure in 2004 for its role in the Illinois Waterway Navigation System.
The lock chambers fill and empty with water to raise or lower vessels between different river elevations, enabling continuous navigation throughout the year.
The facility incorporates Chanoine wicket gates for navigation control, distinguishing it from other river facilities that use Tainter gate systems.
Location: Brown County
Elevation above the sea: 134 m
GPS coordinates: 39.94080,-90.53390
Latest update: March 13, 2025 11:36
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