State Route 29 NB over Napa Creek
GoodNapa County, California · 04-NAP-029-11.65-NAP · Structure no. 21 0022R
- Built
- 1949
- 76 years old, rebuilt 1970
- Condition
- Good
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 108 ft
- 3 main spans
- Daily traffic
- 33,500
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 29 NB over Napa Creek is a concrete continuous slab carrying State Route 29 NB over Napa Creek in Napa County, California. It was built in 1949 and reconstructed in 1970, so it is 76 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 33,500 vehicles a day, roughly 6% of them trucks, projected to reach 43,550 by 2040. The structure is 108 ft (32.9 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 29 NB over Napa Creek built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1970.
What condition is State Route 29 NB over Napa 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 April 2023.
How much traffic does State Route 29 NB over Napa Creek carry?
About 33,500 vehicles per day (2017 count), of which roughly 6% are trucks.
How long is State Route 29 NB over Napa Creek?
The structure is 108 ft (32.9 m) long with a longest span of 45 ft (13.7 m) and a deck 64 ft wide.
Who owns State Route 29 NB over Napa Creek?
It is owned by the State Highway Agency.