Structure 12375 · Bonneville County, ID
Carries US 20 over Willow Creek, 3 N. Idaho Falls.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.
How ratings work22 ft end to end. 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 rigid-frame bridge.
| State | Idaho |
| County | Bonneville |
| Location | 3 N. Idaho Falls |
| Carries | US 20 |
| Crosses | Willow Creek |
| Coordinates | 43.54742, -111.99950 |
| Material | Concrete |
| Design | Frame |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 219.2 ft (66.8 m) |
| Deck Area | 447.6 sq m |
| Main Spans | 1 |
| Year Built | 1970 (reconstructed 2004) |
| Avg Daily Traffic | 27,000 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 4 |
| Last Inspection | April 2022 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000012375 |
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.