First Street over Napa River
GoodNapa County, California · 0.1 MI W of SR 121 · Structure no. 21C0130
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected August 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 167 ft
- 3 main spans
- Daily traffic
- 23,200
- 2009 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
First Street over Napa River is a concrete continuous tee beam carrying First Street over Napa River in Napa County, California. It was built in 2009, so it is 16 years old, younger 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 23,200 vehicles a day, roughly 10% of them trucks, projected to reach 36,216 by 2045. The structure is 167 ft (50.9 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 First Street over Napa River built?
It was built in 2009, making it 16 years old in 2025.
What condition is First Street over Napa River 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 August 2023.
How much traffic does First Street over Napa River carry?
About 23,200 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is First Street over Napa River?
The structure is 167 ft (50.9 m) long with a longest span of 70 ft (21.3 m) and a deck 64 ft wide.
Who owns First Street over Napa River?
It is owned by the City or Municipal Highway Agency.