Hyampom Road over Hayfork Creek
GoodTrinity County, California · 23.2 MI West of SR 3 · Structure no. 05C0118
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 244 ft
- 2 main spans
- Daily traffic
- 330
- 2000 count
- Owner
- County
- County Highway Agency
About this bridge
Hyampom Road over Hayfork Creek is a prestressed concrete continuous box beam or girders - multiple carrying Hyampom Road over Hayfork Creek in Trinity County, California. It was built in 1978, so it is 47 years old, younger 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 330 vehicles a day, roughly 5% of them trucks, projected to reach 426 by 2042. The structure is 244 ft (74.4 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Hyampom Road over Hayfork Creek built?
It was built in 1978, making it 47 years old in 2025.
What condition is Hyampom Road over Hayfork Creek 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 May 2024.
How much traffic does Hyampom Road over Hayfork Creek carry?
About 330 vehicles per day (2000 count), of which roughly 5% are trucks.
How long is Hyampom Road over Hayfork Creek?
The structure is 244 ft (74.4 m) long with a longest span of 121 ft (37 m) and a deck 33 ft wide.
Who owns Hyampom Road over Hayfork Creek?
It is owned by the County Highway Agency.