State Route 37 over Napa River and Wilson Av
PoorSolano County, California · 04-SOL-037-R7.39-VAL · Structure no. 23 0064
- Built
- 1963
- 62 years old, rebuilt 1998
- Condition
- Poor
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 3,280 ft
- 33 main spans
- Daily traffic
- 33,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 37 over Napa River and Wilson Av is a prestressed concrete stringer/multi-beam or girder carrying State Route 37 over Napa River and Wilson Av in Solano County, California. It was built in 1963 and reconstructed in 1998, so it is 62 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 33,000 vehicles a day, roughly 12% of them trucks, projected to reach 48,869 by 2040. The structure is 3,280 ft (999.8 m) long and 74 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 37 over Napa River and Wilson Av built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1998.
What condition is State Route 37 over Napa River and Wilson Av 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 December 2023.
How much traffic does State Route 37 over Napa River and Wilson Av carry?
About 33,000 vehicles per day (2009 count), of which roughly 12% are trucks.
How long is State Route 37 over Napa River and Wilson Av?
The structure is 3,280 ft (999.8 m) long with a longest span of 188 ft (57.3 m) and a deck 74 ft wide.
Who owns State Route 37 over Napa River and Wilson Av?
It is owned by the State Highway Agency.