US Highway 101 NB over Russian River
FairSonoma County, California · 04-SON-101-33.78-HLBG · Structure no. 20 0273R
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 773 ft
- 4 main spans
- Daily traffic
- 22,750
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Russian River is a prestressed concrete continuous box beam or girders - multiple carrying US Highway 101 NB over Russian River in Sonoma County, California. It was built in 1999, so it is 26 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 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 22,750 vehicles a day, roughly 13% of them trucks, projected to reach 44,023 by 2045. The structure is 773 ft (235.6 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| 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 US Highway 101 NB over Russian River built?
It was built in 1999, making it 26 years old in 2025.
What condition is US Highway 101 NB 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 US Highway 101 NB over Russian River carry?
About 22,750 vehicles per day (2015 count), of which roughly 13% are trucks.
How long is US Highway 101 NB over Russian River?
The structure is 773 ft (235.6 m) long with a longest span of 218 ft (66.4 m) and a deck 42 ft wide.
Who owns US Highway 101 NB over Russian River?
It is owned by the State Highway Agency.