U.S. Highway 101 over Red Mountain Creek
FairMendocino County, California · 01-MEN-101-M100.46 · Structure no. 10 0035
- Built
- 1955
- 70 years old, rebuilt 1976
- Condition
- Fair
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 27 ft
- 1 main span
- Daily traffic
- 6,100
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Red Mountain Creek is a concrete arch - deck carrying U.S. Highway 101 over Red Mountain Creek in Mendocino County, California. It was built in 1955 and reconstructed in 1976, so it is 70 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 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 6,100 vehicles a day, roughly 11% of them trucks, projected to reach 9,243 by 2042. The structure is 27 ft (8.2 m) long. 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 |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Red Mountain Creek built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1976.
What condition is U.S. Highway 101 over Red Mountain 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 April 2024.
How much traffic does U.S. Highway 101 over Red Mountain Creek carry?
About 6,100 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is U.S. Highway 101 over Red Mountain Creek?
The structure is 27 ft (8.2 m) long with a longest span of 20 ft (6.1 m).
Who owns U.S. Highway 101 over Red Mountain Creek?
It is owned by the State Highway Agency.