East-West RD over Lost River
FairSiskiyou County, California · 1.8 MI W SR 139 · Structure no. 02C0105
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected June 2023
- Type
- Slab
- Concrete Continuous
- Length
- 391 ft
- 14 main spans
- Daily traffic
- 827
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
East-West RD over Lost River is a concrete continuous slab carrying East-West RD over Lost River in Siskiyou County, California. It was built in 1984, so it is 41 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 827 vehicles a day, roughly 10% of them trucks, projected to reach 1,308 by 2041. The structure is 391 ft (119.1 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was East-West RD over Lost River built?
It was built in 1984, making it 41 years old in 2025.
What condition is East-West RD over Lost River 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 June 2023.
How much traffic does East-West RD over Lost River carry?
About 827 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is East-West RD over Lost River?
The structure is 391 ft (119.1 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.
Who owns East-West RD over Lost River?
It is owned by the County Highway Agency.