Structure 242750 · Marshall County, IA
Carries Local over Linn Creek, 083190401.
Set by its lowest-rated component: Deck and Superstructure at 4 of 9.
How ratings work21 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 | Marshall |
| Location | 083190401 |
| Carries | Local |
| Crosses | Linn Creek |
| Coordinates | 42.03426, -93.07069 |
| Material | Concrete |
| Design | Slab |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 21.3 ft (6.5 m) |
| Deck Area | 41.6 sq m |
| Main Spans | 1 |
| Year Built | 1916 |
| Avg Daily Traffic | 21 (2022) |
| Lanes On Bridge | 2 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000242750 |
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.