Westgate Drive over Milliken Creek
FairNapa County, California · 0.1 MI S/O Milliken Ck DR · Structure no. 21C0148
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected May 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 80 ft
- 1 main span
- Daily traffic
- 1,000
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Westgate Drive over Milliken Creek is a prestressed concrete tee beam carrying Westgate Drive over Milliken Creek in Napa County, California. It was built in 1966, so it is 59 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 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 1,000 vehicles a day, roughly 4% of them trucks, projected to reach 1,326 by 2046. The structure is 80 ft (24.4 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| 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. |
| Channel and channel protection | 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 Westgate Drive over Milliken Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is Westgate Drive 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 Westgate Drive over Milliken Creek carry?
About 1,000 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is Westgate Drive over Milliken Creek?
The structure is 80 ft (24.4 m) long with a longest span of 78 ft (23.9 m) and a deck 44 ft wide.
Who owns Westgate Drive over Milliken Creek?
It is owned by the County Highway Agency.