Summerhome Park RD over Hillside
FairSonoma County, California · 0.85 MI SW River RD · Structure no. 20C0377
- Built
- 1930
- 95 years old, rebuilt 2009
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 340 ft
- 18 main spans
- Daily traffic
- 101
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Summerhome Park RD over Hillside is a steel stringer/multi-beam or girder carrying Summerhome Park RD over Hillside in Sonoma County, California. It was built in 1930 and reconstructed in 2009, so it is 95 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 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 101 vehicles a day, roughly 1% of them trucks, projected to reach 109 by 2042. The structure is 340 ft (103.6 m) long and 10 ft wide. If it were closed, the detour would be 123.7 mi (199 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 Summerhome Park RD over Hillside built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2009.
What condition is Summerhome Park 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 March 2024.
How much traffic does Summerhome Park RD over Hillside carry?
About 101 vehicles per day (2011 count), of which roughly 1% are trucks.
How long is Summerhome Park RD over Hillside?
The structure is 340 ft (103.6 m) long with a longest span of 19 ft (5.8 m) and a deck 10 ft wide.
Who owns Summerhome Park RD over Hillside?
It is owned by the County Highway Agency.