| Special Bridge Conditions Legend |
| ! | Confirmed demolition date within one year or an especially historic bridge that is threatened with demolition at any level. |
| X | The bridge has been confirmed demolished or collapsed. |
| S | The bridge has been dismantled or moved to an offsite location and is not currently available for public viewing. |
| L | Most or all of the original bridge material has been demolished and replaced, including historically significant elements, but some original parts of the bridge remain. |
| Note: This website cannot guarantee the current condition of any bridge on this website. Bridges lacking these icons should not necessarily be considered condition-free. |
| Bridge Name | HSR Rating | Facility Carried / Feature Intersected | Location | Structure Type | Structure Dimensions | Construction Date / Builder or Contractor | Description | Thumbnail | ! |
Milton-Madison Bridge
Madison-Milton Bridge |
 | US-421 Over Ohio River | Madison and Milton: Trimble County, Kentucky and Jefferson County, Indiana | Metal Cantilever 22 Panel Rivet-Connected Pratt Through Truss, Fixed and Approach Spans: Metal 7 Panel Rivet-Connected Pratt Deck Truss, Fixed |
Total Length: 3184 ft Main Span Length: 600 ft Roadway Width: 20 ft Main Spans: 4 |
1929 By: Mount Vernon Bridge Company of Mount Vernon, Ohio and J. G. White Engineering Company | One of the most important and unique cantilever truss bridges in the country is slated for demolition! | 
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