N680-OLYMPIC Off over Las Trampas Creek
FairContra Costa County, California · 04-CC-680-13.72-WLC · Structure no. 28 0162S
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 168 ft
- 1 main span
- Daily traffic
- 25,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
N680-OLYMPIC Off over Las Trampas Creek is a prestressed concrete box beam or girders - multiple carrying N680-OLYMPIC Off over Las Trampas 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 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 25,000 vehicles a day, roughly 6% of them trucks, projected to reach 32,712 by 2044. The structure is 168 ft (51.2 m) long and 28 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 N680-OLYMPIC Off over Las Trampas Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is N680-OLYMPIC Off over Las Trampas 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 July 2024.
How much traffic does N680-OLYMPIC Off over Las Trampas Creek carry?
About 25,000 vehicles per day (2009 count), of which roughly 6% are trucks.
How long is N680-OLYMPIC Off over Las Trampas Creek?
The structure is 168 ft (51.2 m) long with a longest span of 165 ft (50.3 m) and a deck 28 ft wide.
Who owns N680-OLYMPIC Off over Las Trampas Creek?
It is owned by the State Highway Agency.