Hatchery Road over Mad River
FairHumboldt County, California · Just S/O Blue Lake · Structure no. 04C0060
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 270 ft
- 2 main spans
- Daily traffic
- 1,016
- 2009 count
- Owner
- County
- County Highway Agency
About this bridge
Hatchery Road over Mad River is a prestressed concrete continuous box beam or girders - multiple carrying Hatchery Road over Mad River in Humboldt County, California. It was built in 1983, so it is 42 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 1,016 vehicles a day, roughly 3% of them trucks, projected to reach 655 by 2041. The structure is 270 ft (82.3 m) long and 31 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Hatchery Road over Mad River built?
It was built in 1983, making it 42 years old in 2025.
What condition is Hatchery Road over Mad 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 October 2023.
How much traffic does Hatchery Road over Mad River carry?
About 1,016 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is Hatchery Road over Mad River?
The structure is 270 ft (82.3 m) long with a longest span of 133 ft (40.5 m) and a deck 31 ft wide.
Who owns Hatchery Road over Mad River?
It is owned by the County Highway Agency.