Structure 51156000001026 · Plumas County, CA
Carries Road 24n28 over Rock Creek, Rock Creek.
Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.
How ratings work28 ft end to end. Lengths and the car on the deck are drawn to the same scale. 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 | California |
| County | Plumas |
| Location | Rock Creek |
| Carries | Road 24n28 |
| Crosses | Rock Creek |
| Coordinates | 39.90261, -121.02483 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 27.9 ft (8.5 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 15.1 ft (4.6 m) |
| Deck Area | 39.1 sq m |
| Main Spans | 1 |
| Year Built | 1956 (reconstructed 1979) |
| Avg Daily Traffic | 50 |
| Lanes On Bridge | 1 |
| Last Inspection | September 2023 |
| Inspection Frequency | Every 24 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 051156000001026 |
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.