Sierra HWY over Oban Wash
GoodLos Angeles County, California · 2.2MI S/O Kern CO Line · Structure no. 53C0388
- Built
- 1921
- 104 years old, rebuilt 1931
- Condition
- Good
- inspected June 2024
- Type
- Culvert
- Concrete
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 3,838
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Sierra HWY over Oban Wash is a concrete culvert carrying Sierra HWY over Oban Wash in Los Angeles County, California. It was built in 1921 and reconstructed in 1931, so it is 104 years old, older 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 3,838 vehicles a day, roughly 2% of them trucks, projected to reach 4,222 by 2041. The structure is 21 ft (6.4 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 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 |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sierra HWY over Oban Wash built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1931.
What condition is Sierra HWY over Oban Wash 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 June 2024.
How much traffic does Sierra HWY over Oban Wash carry?
About 3,838 vehicles per day (2017 count), of which roughly 2% are trucks.
How long is Sierra HWY over Oban Wash?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 48 ft wide.
Who owns Sierra HWY over Oban Wash?
It is owned by the County Highway Agency.