Japonica Way over Alamo Creek
FairContra Costa County, California · 1/10 MI E. of N. Monarch · Structure no. 28C0242
- Built
- 2007
- 18 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 127 ft
- 1 main span
- Daily traffic
- 1,000
- 2020 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Japonica Way over Alamo Creek is a prestressed concrete box beam or girders - multiple carrying Japonica Way over Alamo Creek in Contra Costa County, California. It was built in 2007, so it is 18 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 1,000 vehicles a day, roughly 1% of them trucks, projected to reach 3,177 by 2041. The structure is 127 ft (38.7 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Japonica Way over Alamo Creek built?
It was built in 2007, making it 18 years old in 2025.
What condition is Japonica Way over Alamo 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 March 2024.
How much traffic does Japonica Way over Alamo Creek carry?
About 1,000 vehicles per day (2020 count), of which roughly 1% are trucks.
How long is Japonica Way over Alamo Creek?
The structure is 127 ft (38.7 m) long with a longest span of 124 ft (37.8 m) and a deck 55 ft wide.
Who owns Japonica Way over Alamo Creek?
It is owned by the City or Municipal Highway Agency.