Old Monte Rio RD over Hillside
FairSonoma County, California · 0.1 MI NE Santa Rosa Ave · Structure no. 20C0455
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 51 ft
- 3 main spans
- Daily traffic
- 100
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Old Monte Rio RD over Hillside is a steel stringer/multi-beam or girder carrying Old Monte Rio RD over Hillside in Sonoma County, California. It was built in 1980, so it is 45 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 109 by 2042. The structure is 51 ft (15.6 m) long and 7 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Monte Rio RD over Hillside built?
It was built in 1980, making it 45 years old in 2025.
What condition is Old Monte Rio RD over Hillside 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 November 2024.
How much traffic does Old Monte Rio RD over Hillside carry?
About 100 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is Old Monte Rio RD over Hillside?
The structure is 51 ft (15.6 m) long with a longest span of 20 ft (6.1 m) and a deck 7 ft wide.
Who owns Old Monte Rio RD over Hillside?
It is owned by the County Highway Agency.