Structure 80792 · Porter County, IN
Carries US 30 over Greiger Ditch, 2.56 W US 421.
A culvert 23 ft across with 3 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 | Indiana |
| County | Porter |
| Location | 2.56 W US 421 |
| Carries | US 30 |
| Crosses | Greiger Ditch |
| Coordinates | 41.43634, -86.93964 |
| Material | Steel |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 6.9 ft (2.1 m) |
| Deck Width | 36.7 ft (11.2 m) |
| Deck Area | 78.4 sq m |
| Main Spans | 3 |
| Year Built | 2014 |
| Avg Daily Traffic | 17,516 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 4 |
| Last Inspection | March 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 080792 |
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.