County Road 99W over Slough S7
GoodYolo County, California · 0.37 MI SE of CR 96 · Structure no. 22C0062
- Built
- 1921
- 104 years old, rebuilt 1950
- Condition
- Good
- inspected January 2025
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 3 main spans
- Daily traffic
- 1,500
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
County Road 99W over Slough S7 is a concrete continuous culvert carrying County Road 99W over Slough S7 in Yolo County, California. It was built in 1921 and reconstructed in 1950, so it is 104 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,500 vehicles a day, roughly 40% of them trucks, projected to reach 2,188 by 2047. The structure is 27 ft (8.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Road 99W over Slough S7 built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1950.
What condition is County Road 99W over Slough S7 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.
How much traffic does County Road 99W over Slough S7 carry?
About 1,500 vehicles per day (2015 count), of which roughly 40% are trucks.
How long is County Road 99W over Slough S7?
The structure is 27 ft (8.2 m) long with a longest span of 9 ft (2.7 m) and a deck 43 ft wide.
Who owns County Road 99W over Slough S7?
It is owned by the County Highway Agency.