First Street over Napa CR & River Overflow
FairNapa County, California · Just East of West Street · Structure no. 21C0127
- Built
- 2005
- 20 years old
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 344 ft
- 3 main spans
- Daily traffic
- 5,235
- 2011 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
First Street over Napa CR & River Overflow is a prestressed concrete continuous box beam or girders - multiple carrying First Street over Napa CR & River Overflow in Napa County, California. It was built in 2005, so it is 20 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 5,235 vehicles a day, roughly 2% of them trucks, projected to reach 19,845 by 2042. The structure is 344 ft (105 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 First Street over Napa CR & River Overflow built?
It was built in 2005, making it 20 years old in 2025.
What condition is First Street over Napa CR & River Overflow in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.
How much traffic does First Street over Napa CR & River Overflow carry?
About 5,235 vehicles per day (2011 count), of which roughly 2% are trucks.
How long is First Street over Napa CR & River Overflow?
The structure is 344 ft (105 m) long with a longest span of 115 ft (35 m) and a deck 66 ft wide.
Who owns First Street over Napa CR & River Overflow?
It is owned by the City or Municipal Highway Agency.