Soscol Ave over Napa River Bypass
FairNapa County, California · Btwn First and Pearl Str · Structure no. 21C0126
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected August 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 335 ft
- 3 main spans
- Daily traffic
- 18,241
- 2011 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Soscol Ave over Napa River Bypass is a prestressed concrete continuous box beam or girders - multiple carrying Soscol Ave over Napa River Bypass in Napa County, California. It was built in 2004, so it is 21 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 18,241 vehicles a day, roughly 8% of them trucks, projected to reach 30,496 by 2041. The structure is 335 ft (102.1 m) long and 104 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Soscol Ave over Napa River Bypass built?
It was built in 2004, making it 21 years old in 2025.
What condition is Soscol Ave over Napa River Bypass 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 August 2023.
How much traffic does Soscol Ave over Napa River Bypass carry?
About 18,241 vehicles per day (2011 count), of which roughly 8% are trucks.
How long is Soscol Ave over Napa River Bypass?
The structure is 335 ft (102.1 m) long with a longest span of 139 ft (42.4 m) and a deck 104 ft wide.
Who owns Soscol Ave over Napa River Bypass?
It is owned by the City or Municipal Highway Agency.