Structure 57160000000000 · Johnston County, OK
Carries N3448 over Mill Creek, 1.4n & 2.2w Of Mill Creek.
Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.
How ratings work23 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 multi-beam bridge.
| State | Oklahoma |
| County | Johnston |
| Location | 1.4n & 2.2w Of Mill Creek |
| Carries | N3448 |
| Crosses | Mill Creek |
| Coordinates | 34.42450, -96.86618 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 16.4 ft (5 m) |
| Deck Area | 35 sq m |
| Main Spans | 1 |
| Year Built | 1938 (reconstructed 1986) |
| Avg Daily Traffic | 24 (2022) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | May 2023 |
| 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 | 057160000000000 |
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.