Swanson Road over Yankee Slough Overflow
FairSutter County, California · 1.95 MI Ne/O SH 70 · Structure no. 18C0053
- Built
- 1934
- 91 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 76 ft
- 4 main spans
- Daily traffic
- 963
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Swanson Road over Yankee Slough Overflow is a steel continuous stringer/multi-beam or girder carrying Swanson Road over Yankee Slough Overflow in Sutter County, California. It was built in 1934, so it is 91 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 963 vehicles a day, roughly 5% of them trucks, projected to reach 1,362 by 2047. The structure is 76 ft (23.2 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 Swanson Road over Yankee Slough Overflow built?
It was built in 1934, making it 91 years old in 2025.
What condition is Swanson Road over Yankee Slough Overflow 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 February 2025.
How much traffic does Swanson Road over Yankee Slough Overflow carry?
About 963 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Swanson Road over Yankee Slough Overflow?
The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.
Who owns Swanson Road over Yankee Slough Overflow?
It is owned by the County Highway Agency.