About Rockford Bridge
The Rockford Bridge is a Parker through truss structure spanning the East Fork White River along State Route 11 in Jackson County, Indiana.
History
In 1939, the Indiana Department of Highways introduced a new 200-foot Parker through truss design to accommodate wider decks without altering the standard 198-foot model. [1] The updated design featured nine panels instead of eleven, increasing individual panel width from 18 to over 22 feet and using heavier structural members. It also incorporated a standardized concrete substructure.
Completed in 1940, the bridge underwent several modifications: its portal was replaced in 1947, the concrete deck in 1969, and sections of the stringers and deck again in 1971. [1]
Structure
Dimensions & Classification
| Structural Form | Through Truss — Parker |
|---|---|
| Primary Material | Steel |
| Total Length | 400' |
| Main Span | 175' |
| Number of Spans | 2 |
| Deck Width | 30' |
| Roadway Width | 26' |
| Vertical Clearance | 15' |
Photographs
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Sources & Citations
References for this location, in MLA format.
- Cooper, James L. Indiana State Highway Bridge Number (11)31A-36-1677C. National Register of Historic Places, National Park Service, 1990.
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