U.S. Highway 101 over Prairie Creek
FairHumboldt County, California · 01-HUM-101-122.86 · Structure no. 04 0029
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected July 2024
- Type
- Slab
- Prestressed Concrete Continuous
- Length
- 121 ft
- 2 main spans
- Daily traffic
- 3,700
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Prairie Creek is a prestressed concrete continuous slab carrying U.S. Highway 101 over Prairie Creek in Humboldt County, California. It was built in 1989, so it is 36 years old, younger 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 5 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 3,700 vehicles a day, roughly 12% of them trucks, projected to reach 5,032 by 2042. The structure is 121 ft (37 m) long and 50 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Prairie Creek built?
It was built in 1989, making it 36 years old in 2025.
What condition is U.S. Highway 101 over Prairie 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 July 2024.
How much traffic does U.S. Highway 101 over Prairie Creek carry?
About 3,700 vehicles per day (2009 count), of which roughly 12% are trucks.
How long is U.S. Highway 101 over Prairie Creek?
The structure is 121 ft (37 m) long with a longest span of 60 ft (18.4 m) and a deck 50 ft wide.
Who owns U.S. Highway 101 over Prairie Creek?
It is owned by the State Highway Agency.