State Route 271 over Big Dann Creek
FairMendocino County, California · 01-MEN-271-4.92 · Structure no. 10 0030
- Built
- 1933
- 92 years old
- Condition
- Fair
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 585 ft
- 1 main span
- Daily traffic
- 150
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 271 over Big Dann Creek is a concrete arch - deck carrying State Route 271 over Big Dann Creek in Mendocino County, California. It was built in 1933, so it is 92 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 150 vehicles a day, roughly 6% of them trucks, projected to reach 255 by 2041. The structure is 585 ft (178.3 m) long and 28 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 | 7 Good | Some minor problems. |
| 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 State Route 271 over Big Dann Creek built?
It was built in 1933, making it 92 years old in 2025.
What condition is State Route 271 over Big Dann 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 State Route 271 over Big Dann Creek carry?
About 150 vehicles per day (2009 count), of which roughly 6% are trucks.
How long is State Route 271 over Big Dann Creek?
The structure is 585 ft (178.3 m) long with a longest span of 320 ft (97.5 m) and a deck 28 ft wide.
Who owns State Route 271 over Big Dann Creek?
It is owned by the State Highway Agency.