Jefferson ST over Napa Drain
GoodNapa County, California · Just North of Trower Ave · Structure no. 21C0128
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected August 2021
- Type
- Culvert
- Concrete Continuous
- Length
- 55 ft
- 3 main spans
- Daily traffic
- 5,439
- 2017 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Jefferson ST over Napa Drain is a concrete continuous culvert carrying Jefferson ST over Napa Drain in Napa County, California. It was built in 1991, so it is 34 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 5,439 vehicles a day, roughly 1% of them trucks, projected to reach 16,770 by 2043. The structure is 55 ft (16.7 m) long and 79 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Jefferson ST over Napa Drain built?
It was built in 1991, making it 34 years old in 2025.
What condition is Jefferson ST over Napa Drain 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 2021.
How much traffic does Jefferson ST over Napa Drain carry?
About 5,439 vehicles per day (2017 count), of which roughly 1% are trucks.
How long is Jefferson ST over Napa Drain?
The structure is 55 ft (16.7 m) long with a longest span of 17 ft (5.2 m) and a deck 79 ft wide.
Who owns Jefferson ST over Napa Drain?
It is owned by the City or Municipal Highway Agency.