Structure 10F0053 · Mendocino County, CA
Carries Forest Road 900 over North Fork Big River, 0.16 Mi S Jct SR 20.
Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.
How ratings work29 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 deck arch.
| State | California |
| County | Mendocino |
| Location | 0.16 Mi S Jct SR 20 |
| Carries | Forest Road 900 |
| Crosses | North Fork Big River |
| Coordinates | 39.34603, -123.51011 |
| Material | Aluminum/Wrought Iron/Cast Iron |
| Design | Arch - Deck |
| Total Length | 28.9 ft (8.8 m) |
| Max Span | 28.9 ft (8.8 m) |
| Deck Area | 46.6 sq m |
| Main Spans | 1 |
| Year Built | 1982 |
| Avg Daily Traffic | 25 (2009) |
| Lanes On Bridge | 1 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Park/Forest Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 10F0053 |
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.