Interstate 505 over Cottonwood Slough
FairYolo County, California · 03-YOL-505-9.66 · Structure no. 22 0115R
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected May 2023
- Type
- Slab
- Concrete Continuous
- Length
- 73 ft
- 3 main spans
- Daily traffic
- 6,000
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 505 over Cottonwood Slough is a concrete continuous slab carrying Interstate 505 over Cottonwood Slough in Yolo County, California. It was built in 1980, so it is 45 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 6 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 6,000 vehicles a day, roughly 27% of them trucks, projected to reach 9,355 by 2041. The structure is 73 ft (22.4 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 505 over Cottonwood Slough built?
It was built in 1980, making it 45 years old in 2025.
What condition is Interstate 505 over Cottonwood 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 2023.
How much traffic does Interstate 505 over Cottonwood Slough carry?
About 6,000 vehicles per day (2010 count), of which roughly 27% are trucks.
How long is Interstate 505 over Cottonwood Slough?
The structure is 73 ft (22.4 m) long with a longest span of 24 ft (7.3 m) and a deck 42 ft wide.
Who owns Interstate 505 over Cottonwood Slough?
It is owned by the State Highway Agency.