State Route 29 over Napa River
GoodNapa County, California · 04-NAP-029-37.03-CSTG · Structure no. 21 0114
- Built
- 2019
- 6 years old
- Condition
- Good
- inspected April 2021
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 81 ft
- 1 main span
- Daily traffic
- 14,000
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 29 over Napa River is a prestressed concrete box beam or girders - multiple carrying State Route 29 over Napa River in Napa County, California. It was built in 2019, so it is 6 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 14,000 vehicles a day, roughly 3% of them trucks, projected to reach 18,200 by 2040. The structure is 81 ft (24.7 m) long and 73 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 29 over Napa River built?
It was built in 2019, making it 6 years old in 2025.
What condition is State Route 29 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 April 2021.
How much traffic does State Route 29 over Napa River carry?
About 14,000 vehicles per day (2017 count), of which roughly 3% are trucks.
How long is State Route 29 over Napa River?
The structure is 81 ft (24.7 m) long with a longest span of 77 ft (23.6 m) and a deck 73 ft wide.
Who owns State Route 29 over Napa River?
It is owned by the State Highway Agency.