Structure 12965 · Custer County, ID
Carries SH 21 over Crooked Creek, 3.1 W. Stanley.
A culvert 21 ft across with 2 openings. 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, so those are drawn as typical for a culvert.
| State | Idaho |
| County | Custer |
| Location | 3.1 W. Stanley |
| Carries | SH 21 |
| Crosses | Crooked Creek |
| Coordinates | 44.23658, -114.99733 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 11.2 ft (3.4 m) |
| Deck Width | 40.0 ft (12.2 m) |
| Deck Area | 78.1 sq m |
| Main Spans | 2 |
| Year Built | 1968 |
| Avg Daily Traffic | 2,200 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 000000000012965 |
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.