State Route 242 over Clayton ROAD-S242 on Rmp
FairContra Costa County, California · 04-CC-242-R0.78-CND · Structure no. 28 0289
- Built
- 1986
- 39 years old, rebuilt 2000
- Condition
- Fair
- inspected January 2022
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 166 ft
- 2 main spans
- Daily traffic
- 80,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 242 over Clayton ROAD-S242 on Rmp is a prestressed concrete continuous box beam or girders - multiple carrying State Route 242 over Clayton ROAD-S242 on Rmp in Contra Costa County, California. It was built in 1986 and reconstructed in 2000, so it is 39 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 80,000 vehicles a day, roughly 5% of them trucks, projected to reach 230,609 by 2044. The structure is 166 ft (50.6 m) long and 114 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 242 over Clayton ROAD-S242 on Rmp built?
It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2000.
What condition is State Route 242 over Clayton ROAD-S242 on Rmp 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 January 2022.
How much traffic does State Route 242 over Clayton ROAD-S242 on Rmp carry?
About 80,000 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is State Route 242 over Clayton ROAD-S242 on Rmp?
The structure is 166 ft (50.6 m) long with a longest span of 97 ft (29.6 m) and a deck 114 ft wide.
Who owns State Route 242 over Clayton ROAD-S242 on Rmp?
It is owned by the State Highway Agency.