Washington ST over Petaluma River
PoorSonoma County, California · Near Downtown Petaluma · Structure no. 20C0045
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 105 ft
- 2 main spans
- Daily traffic
- 21,900
- 2013 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Washington ST over Petaluma River is a prestressed concrete stringer/multi-beam or girder carrying Washington ST over Petaluma River in Sonoma County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 21,900 vehicles a day, roughly 10% of them trucks, projected to reach 21,858 by 2045. The structure is 105 ft (32 m) long and 89 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Washington ST over Petaluma River built?
It was built in 1970, making it 55 years old in 2025.
What condition is Washington ST over Petaluma River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does Washington ST over Petaluma River carry?
About 21,900 vehicles per day (2013 count), of which roughly 10% are trucks.
How long is Washington ST over Petaluma River?
The structure is 105 ft (32 m) long with a longest span of 51 ft (15.5 m) and a deck 89 ft wide.
Who owns Washington ST over Petaluma River?
It is owned by the City or Municipal Highway Agency.