Structure 6800000000000 · Bureau County, IL
Carries Jefferson Street over Rocky Run Creek, W Center Of Tiskilwa.
A culvert 23 ft across. 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 | Bureau |
| Location | W Center Of Tiskilwa |
| Carries | Jefferson Street |
| Crosses | Rocky Run Creek |
| Coordinates | 41.29422, -89.51417 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 68.6 sq m |
| Main Spans | 1 |
| Year Built | 2021 |
| Avg Daily Traffic | 125 (2020) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2023 |
| Inspection Frequency | Every 48 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 006800000000000 |
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.