Highland Road over Tassajara Creek
FairContra Costa County, California · At Camino Tassajara · Structure no. 28C0401
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 91 ft
- 1 main span
- Daily traffic
- 3,968
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Highland Road over Tassajara Creek is a prestressed concrete box beam or girders - multiple carrying Highland Road over Tassajara Creek in Contra Costa County, California. It was built in 1996, so it is 29 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 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 3,968 vehicles a day, roughly 2% of them trucks, projected to reach 8,327 by 2046. The structure is 91 ft (27.6 m) long and 36 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Highland Road over Tassajara Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is Highland Road over Tassajara 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 November 2024.
How much traffic does Highland Road over Tassajara Creek carry?
About 3,968 vehicles per day (2013 count), of which roughly 2% are trucks.
How long is Highland Road over Tassajara Creek?
The structure is 91 ft (27.6 m) long with a longest span of 88 ft (26.7 m) and a deck 36 ft wide.
Who owns Highland Road over Tassajara Creek?
It is owned by the County Highway Agency.