Butler Valley RD over Mad River
FairHumboldt County, California · 0.1 MI E/O Black Crk LN · Structure no. 04C0052
- Built
- 1937
- 88 years old, rebuilt 1965
- Condition
- Fair
- inspected June 2023
- Type
- Arch - Deck
- Concrete
- Length
- 204 ft
- 1 main span
- Daily traffic
- 105
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Butler Valley RD over Mad River is a concrete arch - deck carrying Butler Valley RD over Mad River in Humboldt County, California. It was built in 1937 and reconstructed in 1965, so it is 88 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 105 vehicles a day, roughly 10% of them trucks, projected to reach 217 by 2045. The structure is 204 ft (62.2 m) long and 22 ft wide. If it were closed, the detour would be 67.1 mi (108 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Butler Valley RD over Mad River built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1965.
What condition is Butler Valley RD 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 June 2023.
How much traffic does Butler Valley RD over Mad River carry?
About 105 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is Butler Valley RD over Mad River?
The structure is 204 ft (62.2 m) long with a longest span of 133 ft (40.5 m) and a deck 22 ft wide.
Who owns Butler Valley RD over Mad River?
It is owned by the County Highway Agency.