Durnel RD over North Fork Hamlin Slough
FairButte County, California · 1.75 MI N of Nelson RD · Structure no. 12C0177
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected November 2024
- Type
- Slab
- Concrete Continuous
- Length
- 80 ft
- 3 main spans
- Daily traffic
- 48
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Durnel RD over North Fork Hamlin Slough is a concrete continuous slab carrying Durnel RD over North Fork Hamlin Slough in Butte County, California. It was built in 1968, so it is 57 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 48 vehicles a day, roughly 30% of them trucks, projected to reach 105 by 2042. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Durnel RD over North Fork Hamlin Slough built?
It was built in 1968, making it 57 years old in 2025.
What condition is Durnel RD over North Fork Hamlin Slough 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 November 2024.
How much traffic does Durnel RD over North Fork Hamlin Slough carry?
About 48 vehicles per day (2019 count), of which roughly 30% are trucks.
How long is Durnel RD over North Fork Hamlin Slough?
The structure is 80 ft (24.4 m) long with a longest span of 26 ft (7.9 m) and a deck 27 ft wide.
Who owns Durnel RD over North Fork Hamlin Slough?
It is owned by the County Highway Agency.