U.S. Highway 101 over Mcnab Creek
FairMendocino County, California · 01-MEN-101-15.94 · Structure no. 10 0004
- Built
- 1942
- 83 years old, rebuilt 1970
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 88 ft
- 5 main spans
- Daily traffic
- 13,800
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Mcnab Creek is a concrete continuous slab carrying U.S. Highway 101 over Mcnab Creek in Mendocino County, California. It was built in 1942 and reconstructed in 1970, so it is 83 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 13,800 vehicles a day, roughly 11% of them trucks, projected to reach 23,951 by 2043. The structure is 88 ft (26.8 m) long and 44 ft wide. If it were closed, the detour would be 54.1 mi (87 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Mcnab Creek built?
It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1970.
What condition is U.S. Highway 101 over Mcnab 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 2023.
How much traffic does U.S. Highway 101 over Mcnab Creek carry?
About 13,800 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is U.S. Highway 101 over Mcnab Creek?
The structure is 88 ft (26.8 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.
Who owns U.S. Highway 101 over Mcnab Creek?
It is owned by the State Highway Agency.