Structure 77880 · Boone County, IA
Carries 160th ST over Beaver Creek, 084280401.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 4 of 9.
How ratings work24 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 slab bridge.
| State | Iowa |
| County | Boone |
| Location | 084280401 |
| Carries | 160th ST |
| Crosses | Beaver Creek |
| Coordinates | 42.12284, -94.12526 |
| Material | Concrete |
| Design | Slab |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 50.5 ft (15.4 m) |
| Deck Area | 112.4 sq m |
| Main Spans | 1 |
| Year Built | 1915 |
| Avg Daily Traffic | 5 (2022) |
| Lanes On Bridge | 2 |
| Last Inspection | May 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | Unknown |
| Structure Number | 000000000077880 |
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.