Structure 35071 · Mahaska County, IA
Carries US 63 over Nenebec Creek, 0.2 Mi. N Of Jct. SR G71.
A culvert 20 ft across with 2 openings. 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, so those are drawn as typical for a culvert.
| State | Iowa |
| County | Mahaska |
| Location | 0.2 Mi. N Of Jct. SR G71 |
| Carries | US 63 |
| Crosses | Nenebec Creek |
| Coordinates | 41.20821, -92.63994 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Area | 156.2 sq m |
| Main Spans | 2 |
| Year Built | 1998 |
| Avg Daily Traffic | 12,500 (2022) |
| Truck Traffic | 19% |
| Lanes On Bridge | 4 |
| Last Inspection | September 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000035071 |
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.