U.S. Highway 101 over South Fork Eel River
FairMendocino County, California · 01-MEN-101-R102.68 · Structure no. 10 0093
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 1,576 ft
- 8 main spans
- Daily traffic
- 6,100
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over South Fork Eel River is a prestressed concrete continuous box beam or girders - multiple carrying U.S. Highway 101 over South Fork Eel River in Mendocino County, California. It was built in 1974, so it is 51 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 6,100 vehicles a day, roughly 14% of them trucks, projected to reach 6,835 by 2041. The structure is 1,576 ft (480.4 m) long and 62 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 South Fork Eel River built?
It was built in 1974, making it 51 years old in 2025.
What condition is U.S. Highway 101 over South Fork Eel River 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 South Fork Eel River carry?
About 6,100 vehicles per day (2009 count), of which roughly 14% are trucks.
How long is U.S. Highway 101 over South Fork Eel River?
The structure is 1,576 ft (480.4 m) long with a longest span of 202 ft (61.6 m) and a deck 62 ft wide.
Who owns U.S. Highway 101 over South Fork Eel River?
It is owned by the State Highway Agency.