Old Highway 99 over Hay Creek
FairSiskiyou County, California · 0.1 MI S Truitman Lane · Structure no. 02C0204
- Built
- 1923
- 102 years old
- Condition
- Fair
- inspected June 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 3 main spans
- Daily traffic
- 1,005
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Old Highway 99 over Hay Creek is a concrete continuous culvert carrying Old Highway 99 over Hay Creek in Siskiyou County, California. It was built in 1923, so it is 102 years old, older 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 1,005 vehicles a day, roughly 10% of them trucks, projected to reach 1,412 by 2042. The structure is 26 ft (7.9 m) long and 32 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Highway 99 over Hay Creek built?
It was built in 1923, making it 102 years old in 2025.
What condition is Old Highway 99 over Hay 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 June 2024.
How much traffic does Old Highway 99 over Hay Creek carry?
About 1,005 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is Old Highway 99 over Hay Creek?
The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m) and a deck 32 ft wide.
Who owns Old Highway 99 over Hay Creek?
It is owned by the County Highway Agency.