County Road 99W over Willow Creek Overflow
GoodGlenn County, California · North of CO RD #48 · Structure no. 11C0187
- Built
- 1937
- 88 years old, rebuilt 1980
- Condition
- Good
- inspected February 2025
- Type
- Culvert
- Concrete Continuous
- Length
- 28 ft
- 3 main spans
- Daily traffic
- 2,678
- 2009 count
- Owner
- County
- County Highway Agency
About this bridge
County Road 99W over Willow Creek Overflow is a concrete continuous culvert carrying County Road 99W over Willow Creek Overflow in Glenn County, California. It was built in 1937 and reconstructed in 1980, so it is 88 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 2,678 vehicles a day, roughly 20% of them trucks, projected to reach 3,077 by 2047. The structure is 28 ft (8.5 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 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 Willow Creek Overflow built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1980.
What condition is County Road 99W over Willow Creek Overflow 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 February 2025.
How much traffic does County Road 99W over Willow Creek Overflow carry?
About 2,678 vehicles per day (2009 count), of which roughly 20% are trucks.
How long is County Road 99W over Willow Creek Overflow?
The structure is 28 ft (8.5 m) long with a longest span of 8 ft (2.4 m) and a deck 38 ft wide.
Who owns County Road 99W over Willow Creek Overflow?
It is owned by the County Highway Agency.