Madrone RD over Sonoma Creek
FairSonoma County, California · 0.3 MI E of Arnold DR · Structure no. 20C0011
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected October 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 161 ft
- 3 main spans
- Daily traffic
- 5,000
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Madrone RD over Sonoma Creek is a concrete continuous tee beam carrying Madrone RD over Sonoma Creek in Sonoma County, California. It was built in 1956, so it is 69 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 6,121 by 2042. The structure is 161 ft (49.1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Madrone RD over Sonoma Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is Madrone RD over Sonoma 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 2024.
How much traffic does Madrone RD over Sonoma Creek carry?
About 5,000 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Madrone RD over Sonoma Creek?
The structure is 161 ft (49.1 m) long with a longest span of 52 ft (15.8 m) and a deck 36 ft wide.
Who owns Madrone RD over Sonoma Creek?
It is owned by the County Highway Agency.