U.S. Highway 101 over Russian River
FairMendocino County, California · 01-MEN-101-9.24 · Structure no. 10 0082
- Built
- 1934
- 91 years old
- Condition
- Fair
- inspected April 2023
- Type
- Truss - Thru
- Steel
- Length
- 1,137 ft
- 1 main span
- Daily traffic
- 13,800
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Russian River is a steel truss - thru carrying U.S. Highway 101 over Russian River in Mendocino County, California. It was built in 1934, so it is 91 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 13,800 vehicles a day, roughly 11% of them trucks, projected to reach 22,546 by 2043. The structure is 1,137 ft (346.6 m) long and 37 ft wide.
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 | 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 Russian River built?
It was built in 1934, making it 91 years old in 2025.
What condition is U.S. Highway 101 over Russian 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 2023.
How much traffic does U.S. Highway 101 over Russian River carry?
About 13,800 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is U.S. Highway 101 over Russian River?
The structure is 1,137 ft (346.6 m) long with a longest span of 245 ft (74.8 m) and a deck 37 ft wide.
Who owns U.S. Highway 101 over Russian River?
It is owned by the State Highway Agency.