SH 21 over Cape Horn Creek
Fair Condition62 years old620 vehicles/day
Location
| State | Idaho |
| County | Custer |
| Location | 17.8 W. Stanley |
| Carries | SH 21 |
| Crosses | Cape Horn Creek |
| Coordinates | 44.39397, -115.17047 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 109.9 ft (33.5 m) |
| Max Span | 29.9 ft (9.1 m) |
| Deck Width | 31.2 ft (9.5 m) |
| Deck Area | 318.2 sq m |
| Main Spans | 4 |
| Year Built | 1964 |
Traffic
| Avg Daily Traffic | 620 (2023) |
| Truck Traffic | 22% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 000000000012955 |