IRR BIA RTE 541A over Supply Creek
FairHumboldt County, California · N Side of Hoopa Loop Road · Structure no. 00000000000J015
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete Continuous
- Length
- 108 ft
- 3 main spans
- Daily traffic
- 1,500
- 2021 count
- Owner
- Federal
- Bureau of Indian Affairs
About this bridge
IRR BIA RTE 541A over Supply Creek is a concrete continuous stringer/multi-beam or girder carrying IRR BIA RTE 541A over Supply Creek in Humboldt County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 1,500 vehicles a day, roughly 15% of them trucks, projected to reach 1,755 by 2043. The structure is 108 ft (33 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR BIA RTE 541A over Supply Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is IRR BIA RTE 541A over Supply Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does IRR BIA RTE 541A over Supply Creek carry?
About 1,500 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is IRR BIA RTE 541A over Supply Creek?
The structure is 108 ft (33 m) long with a longest span of 80 ft (24.4 m) and a deck 35 ft wide.
Who owns IRR BIA RTE 541A over Supply Creek?
It is owned by the Bureau of Indian Affairs.