Thornton Ave over State Route 84
GoodAlameda County, California · 04-ALA-084-R3.75-NWK · Structure no. 33 0508
- Built
- 1983
- 42 years old, rebuilt 1990
- Condition
- Good
- inspected August 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 224 ft
- 2 main spans
- Daily traffic
- 54,000
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Thornton Ave over State Route 84 is a prestressed concrete continuous box beam or girders - multiple carrying Thornton Ave over State Route 84 in Alameda County, California. It was built in 1983 and reconstructed in 1990, so it is 42 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 54,000 vehicles a day, roughly 2% of them trucks, projected to reach 40,479 by 2043. The structure is 224 ft (68.3 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Thornton Ave over State Route 84 built?
It was built in 1983, making it 42 years old in 2025. It was reconstructed in 1990.
What condition is Thornton Ave over State Route 84 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does Thornton Ave over State Route 84 carry?
About 54,000 vehicles per day (2010 count), of which roughly 2% are trucks.
How long is Thornton Ave over State Route 84?
The structure is 224 ft (68.3 m) long with a longest span of 112 ft (34.1 m) and a deck 78 ft wide.
Who owns Thornton Ave over State Route 84?
It is owned by the State Highway Agency.