Atlas Peak Road over Milliken Creek
FairNapa County, California · 0.35 MI NW of SR 121 · Structure no. 21C0032
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 82 ft
- 3 main spans
- Daily traffic
- 3,745
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Atlas Peak Road over Milliken Creek is a concrete continuous slab carrying Atlas Peak Road over Milliken Creek in Napa County, California. It was built in 1969, so it is 56 years old, older 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 6 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 3,745 vehicles a day, roughly 10% of them trucks, projected to reach 6,195 by 2042. The structure is 82 ft (25 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Atlas Peak Road over Milliken Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is Atlas Peak Road over Milliken Creek 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 Atlas Peak Road over Milliken Creek carry?
About 3,745 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Atlas Peak Road over Milliken Creek?
The structure is 82 ft (25 m) long with a longest span of 32 ft (9.8 m) and a deck 33 ft wide.
Who owns Atlas Peak Road over Milliken Creek?
It is owned by the County Highway Agency.