Structure 17247 · Shoshone County, ID
Carries I 90 over I 90b;canyon CR, In Wallace.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work4,478 ft end to end, longest span 150 ft: about 12 football fields. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.
| State | Idaho |
| County | Shoshone |
| Location | In Wallace |
| Carries | I 90 |
| Crosses | I 90b;canyon CR |
| Coordinates | 47.47561, -115.92869 |
| Material | Prestressed Concrete Continuous |
| Design | Box Beam - Single/Spread |
| Total Length | 4478.0 ft (1364.9 m) |
| Max Span | 149.9 ft (45.7 m) |
| Deck Width | 83.7 ft (25.5 m) |
| Deck Area | 34804.9 sq m |
| Main Spans | 34 |
| Year Built | 1991 |
| Avg Daily Traffic | 11,000 (2023) |
| Truck Traffic | 31% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 2 |
| Last Inspection | November 2023 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 9 — Foundation above flood level |
| Structure Number | 000000000017247 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.