State Route 29 NB over Napa Valley Corporate DR
FairNapa County, California · 04-NAP-029-R6.64 · Structure no. 21 0094R
- Built
- 1981
- 44 years old
- Condition
- Fair
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 138 ft
- 1 main span
- Daily traffic
- 22,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 29 NB over Napa Valley Corporate DR is a prestressed concrete box beam or girders - multiple carrying State Route 29 NB over Napa Valley Corporate DR in Napa County, California. It was built in 1981, so it is 44 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 22,500 vehicles a day, roughly 7% of them trucks, projected to reach 34,135 by 2045. The structure is 138 ft (42.2 m) long and 42 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 29 NB over Napa Valley Corporate DR built?
It was built in 1981, making it 44 years old in 2025.
What condition is State Route 29 NB over Napa Valley Corporate DR 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 April 2023.
How much traffic does State Route 29 NB over Napa Valley Corporate DR carry?
About 22,500 vehicles per day (2009 count), of which roughly 7% are trucks.
How long is State Route 29 NB over Napa Valley Corporate DR?
The structure is 138 ft (42.2 m) long with a longest span of 136 ft (41.5 m) and a deck 42 ft wide.
Who owns State Route 29 NB over Napa Valley Corporate DR?
It is owned by the State Highway Agency.