The Alton Bridge is the third through truss bridge than CLR Inc. rehabilitated. It is a very impressive bridge, with a long through truss and three pony truss spans on one end and one other pony truss span on the the other for a total of five spans in all. It is situated high above the stream, and is almost at the mouth of the Blue River where it flows into the Ohio River.
Through truss bridge over Little Blue River on CR 1190 South in Alton
Open to one-lane traffic
Restored in 2009
Main span: Pratt through truss
Length of largest span: 138.7 ft.
Total length: 419.8 ft.
Deck width: 12.5 ft.
Vertical clearance above deck: 15.5 ft.
Eligible for the National Register of Historic Places
Crawford County Bridge #45