Rohnert Park Expwy over U.S. Highway 101 & Ramps
FairSonoma County, California · 04-SON-101-13.88-RNPK · Structure no. 20 0235
- Built
- 1973
- 52 years old, rebuilt 1999
- Condition
- Fair
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 282 ft
- 2 main spans
- Daily traffic
- 20,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
Rohnert Park Expwy over U.S. Highway 101 & Ramps is a prestressed concrete continuous box beam or girders - multiple carrying Rohnert Park Expwy over U.S. Highway 101 & Ramps in Sonoma County, California. It was built in 1973 and reconstructed in 1999, so it is 52 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 20,000 vehicles a day, roughly 5% of them trucks, projected to reach 37,533 by 2046. The structure is 282 ft (86 m) long and 111 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rohnert Park Expwy over U.S. Highway 101 & Ramps built?
It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1999.
What condition is Rohnert Park Expwy over U.S. Highway 101 & Ramps 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 Rohnert Park Expwy over U.S. Highway 101 & Ramps carry?
About 20,000 vehicles per day (2014 count), of which roughly 5% are trucks.
How long is Rohnert Park Expwy over U.S. Highway 101 & Ramps?
The structure is 282 ft (86 m) long with a longest span of 140 ft (42.7 m) and a deck 111 ft wide.
Who owns Rohnert Park Expwy over U.S. Highway 101 & Ramps?
It is owned by the State Highway Agency.