| 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 |
Black Hawk Bridge
Lansing Bridge |
 | IA-9 and WI-82 Over Mississippi River | Lansing and Rural: Allamakee County, Iowa and Crawford County, Wisconsin | Metal Cantilever 22 Panel Multiple-Type-Connected Pennsylvania Through Truss, Fixed and Approach Spans: Metal 6 Panel Rivet-Connected Pratt Deck Truss, Fixed |
Total Length: 1630.7 ft Main Span Length: 652.3 ft Roadway Width: 21 ft Main Spans: 3 |
1931 By: McClintic-Marshall Company of Pittsburgh, Pennsylvania and Melvin B. Stone of Minneapolis, Minnesota | One of the most unusual, beautiful, and significant bridges on the Mississippi River. | 
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South Road Bridge
Iowa Bridge Number 63170 |
 | South Road Drive Over Clear Creek | Rural: Allamakee County, Iowa | Metal 8 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 72.2 ft Main Span Length: 70 ft Roadway Width: 18 ft Main Spans: 1 |
1915 By: Unknown | A small, but attractive riveted pony truss just off the main road. | 
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