Structure 15C0045 · Colusa County, CA
Carries Old 99w over North Branch Brush Creek, 0.2 Mi N Of Perkins RD.
21 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 tee-beam bridge.
| State | California |
| County | Colusa |
| Location | 0.2 Mi N Of Perkins RD |
| Carries | Old 99w |
| Crosses | North Branch Brush Creek |
| Coordinates | 38.98639, -122.03629 |
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Area | 50.6 sq m |
| Main Spans | 1 |
| Year Built | 1925 (reconstructed 1936) |
| Avg Daily Traffic | 1,958 (2014) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Unknown |
| Structure Number | 15C0045 |
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.