Structure 81312800000000 · Rock Island County, IL
Carries Tr 236 over Unnamed Creek, 3 Mi NW Hilsdale.
A culvert 24 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 | Illinois |
| County | Rock Island |
| Location | 3 Mi NW Hilsdale |
| Carries | Tr 236 |
| Crosses | Unnamed Creek |
| Coordinates | 41.63463, -90.19994 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.6 ft (7.2 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 43.9 sq m |
| Main Spans | 2 |
| Year Built | 2012 |
| Avg Daily Traffic | 75 (2020) |
| Truck Traffic | 40% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2022 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 081312800000000 |
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.