Structure 223160 · Linn County, IA
Carries Linn Buchanan over Dead Dog Run, 086070303.
Set by its lowest-rated component: Deck and Superstructure at 5 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 | Linn |
| Location | 086070303 |
| Carries | Linn Buchanan |
| Crosses | Dead Dog Run |
| Coordinates | 42.29650, -91.64169 |
| Material | Wood or Timber |
| Design | Slab |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 19.0 ft (5.8 m) |
| Deck Width | 20.7 ft (6.3 m) |
| Deck Area | 40.3 sq m |
| Main Spans | 1 |
| Year Built | 1949 (reconstructed 1953) |
| Avg Daily Traffic | 44 (2022) |
| Lanes On Bridge | 2 |
| Last Inspection | September 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 7 — Countermeasures installed |
| Structure Number | 000000000223160 |
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.