State Route 37 over Tolay Creek
GoodSonoma County, California · 04-SON-037-4.04 · Structure no. 20 0090
- Built
- 1931
- 94 years old, rebuilt 1972
- Condition
- Good
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 32,000
- 2012 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 37 over Tolay Creek is a prestressed concrete box beam or girders - multiple carrying State Route 37 over Tolay Creek in Sonoma County, California. It was built in 1931 and reconstructed in 1972, so it is 94 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 32,000 vehicles a day, roughly 6% of them trucks, projected to reach 49,356 by 2046. The structure is 61 ft (18.6 m) long and 42 ft wide. If it were closed, the detour would be 39.8 mi (64 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 37 over Tolay Creek built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1972.
What condition is State Route 37 over Tolay Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.
How much traffic does State Route 37 over Tolay Creek carry?
About 32,000 vehicles per day (2012 count), of which roughly 6% are trucks.
How long is State Route 37 over Tolay Creek?
The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 42 ft wide.
Who owns State Route 37 over Tolay Creek?
It is owned by the State Highway Agency.