Lock and Dam No. 21

USA / Illinois / Quincy /
 dam, lock (water navigation), NRHP - National Register of Historic Places, 1938_construction

Lock and Dam No. 21 is a lock and dam located at Quincy, Illinois on the Upper Mississippi River around river mile 324.9.
Nearby cities:
Coordinates:   39°54'20"N   91°25'52"W
This article was last modified 8 years ago