IRR BIA RTE 541a over Supply Creek
Fair Condition60 years old1,500 vehicles/day
Location
| State | California |
| County | Humboldt |
| Location | N Side Of Hoopa Loop Road |
| Carries | IRR BIA RTE 541a |
| Crosses | Supply Creek |
| Coordinates | 41.05144, -123.68097 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 108.3 ft (33 m) |
| Max Span | 80.1 ft (24.4 m) |
| Deck Width | 35.4 ft (10.8 m) |
| Deck Area | 356.4 sq m |
| Main Spans | 3 |
| Year Built | 1966 |
Traffic
| Avg Daily Traffic | 1,500 (2021) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 00000000000J015 |