Structure 15C0181 · Colusa County, CA
Carries La Grande RD over Glenn-colusa Canal, 0.3 Mi West Danley RD.
23 ft end to end, longest span 10 ft. 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 slab bridge.
| State | California |
| County | Colusa |
| Location | 0.3 Mi West Danley RD |
| Carries | La Grande RD |
| Crosses | Glenn-colusa Canal |
| Coordinates | 39.19358, -122.25161 |
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 20.7 ft (6.3 m) |
| Deck Area | 44.1 sq m |
| Main Spans | 2 |
| Year Built | 1940 |
| Avg Daily Traffic | 42 (2015) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 15C0181 |
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.