Myrtledale RD over Napa River
FairNapa County, California · 0.2 MI SE Tubbs Lane · Structure no. 21C0066
- Built
- 1930
- 95 years old, rebuilt 1950
- Condition
- Fair
- inspected May 2024
- Type
- Arch - Deck
- Concrete
- Length
- 24 ft
- 1 main span
- Daily traffic
- 671
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Myrtledale RD over Napa River is a concrete arch - deck carrying Myrtledale RD over Napa River in Napa County, California. It was built in 1930 and reconstructed in 1950, so it is 95 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 671 vehicles a day, roughly 10% of them trucks, projected to reach 1,095 by 2046. The structure is 24 ft (7.3 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Myrtledale RD over Napa River built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1950.
What condition is Myrtledale RD over Napa River 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 Myrtledale RD over Napa River carry?
About 671 vehicles per day (2012 count), of which roughly 10% are trucks.
How long is Myrtledale RD over Napa River?
The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 44 ft wide.
Who owns Myrtledale RD over Napa River?
It is owned by the County Highway Agency.