River RD over Grassy Banks Slough
FairButte County, California · 2.03 MI N of Ord Ferry RD · Structure no. 12C0317
- Built
- 1930
- 95 years old, rebuilt 1982
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 24 ft
- 1 main span
- Daily traffic
- 1,256
- 2006 count
- Owner
- County
- County Highway Agency
About this bridge
River RD over Grassy Banks Slough is a steel stringer/multi-beam or girder carrying River RD over Grassy Banks Slough in Butte County, California. It was built in 1930 and reconstructed in 1982, so it is 95 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 1,256 vehicles a day, roughly 8% of them trucks, projected to reach 820 by 2046. The structure is 24 ft (7.4 m) long and 26 ft wide. If it were closed, the detour would be 18 mi (29 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was River RD over Grassy Banks Slough built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1982.
What condition is River RD over Grassy Banks 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 May 2024.
How much traffic does River RD over Grassy Banks Slough carry?
About 1,256 vehicles per day (2006 count), of which roughly 8% are trucks.
How long is River RD over Grassy Banks Slough?
The structure is 24 ft (7.4 m) long with a longest span of 12 ft (3.6 m) and a deck 26 ft wide.
Who owns River RD over Grassy Banks Slough?
It is owned by the County Highway Agency.