River RD over Hobson Creek
FairSonoma County, California · 5.19 MI Intx With SR 116 · Structure no. 20C0036
- Built
- 1950
- 75 years old
- Condition
- Fair
- inspected October 2023
- Type
- Slab
- Concrete Continuous
- Length
- 226 ft
- 8 main spans
- Daily traffic
- 10,000
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
River RD over Hobson Creek is a concrete continuous slab carrying River RD over Hobson Creek in Sonoma County, California. It was built in 1950, so it is 75 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 13,000 by 2040. The structure is 226 ft (68.9 m) long and 36 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was River RD over Hobson Creek built?
It was built in 1950, making it 75 years old in 2025.
What condition is River RD over Hobson Creek 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 October 2023.
How much traffic does River RD over Hobson Creek carry?
About 10,000 vehicles per day (2015 count), of which roughly 3% are trucks.
How long is River RD over Hobson Creek?
The structure is 226 ft (68.9 m) long with a longest span of 28 ft (8.5 m) and a deck 36 ft wide.
Who owns River RD over Hobson Creek?
It is owned by the County Highway Agency.