U.S. Highway 101 over South Fork Eel River
FairMendocino County, California · 01-MEN-101-R99.51 · Structure no. 10 0299
- Built
- 2009
- 16 years old
- Condition
- Fair
- inspected April 2024
- Type
- Segmental Box Girder
- Prestressed Concrete Continuous
- Length
- 1,355 ft
- 3 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 segmental box girder carrying U.S. Highway 101 over South Fork Eel River in Mendocino County, California. It was built in 2009, so it is 16 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 11% of them trucks, projected to reach 9,243 by 2042. The structure is 1,355 ft (413 m) long and 43 ft wide. If it were closed, the detour would be 57.2 mi (92 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 | 9 Excellent | 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 2009, making it 16 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 11% are trucks.
How long is U.S. Highway 101 over South Fork Eel River?
The structure is 1,355 ft (413 m) long with a longest span of 571 ft (174 m) and a deck 43 ft wide.
Who owns U.S. Highway 101 over South Fork Eel River?
It is owned by the State Highway Agency.