| 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 | ! |
Siam Steel Bridge
|
 | Steel Bridge Road Over Watauga River | Rural: Carter County, Tennessee | Metal 8 Panel Rivet-Connected Pratt Through Truss, Fixed |
Total Length: 240 ft Main Span Length: 137 ft Roadway Width: 15.4 ft Main Spans: 2 |
1941 By: Unknown | Steel Bridge Road no longer has a steel bridge on it, since a slab of concrete has replaced it. | 
|
Wilbur Dam Road Bridge
|
 | Wilbur Dam Road Over Watauga River | Rural: Carter County, Tennessee | Metal Rivet-Connected Baltimore Deck Truss, Fixed |
Total Length: 377.8 ft Main Span Length: 75 ft Roadway Width: 20 ft Main Spans: 4 |
1942 By: Unknown | With its uncommon truss configuration and varying span sizes, this is a very unusual bridge. | 
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