Gridley Colusa HWY over Lateral D Canal
GoodButte County, California · 2.8 MI E/O Colusa · Structure no. 12C0012
- Built
- 1922
- 103 years old, rebuilt 1949
- Condition
- Good
- inspected October 2024
- Type
- Tee Beam
- Concrete
- Length
- 26 ft
- 1 main span
- Daily traffic
- 524
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
Gridley Colusa HWY over Lateral D Canal is a concrete tee beam carrying Gridley Colusa HWY over Lateral D Canal in Butte County, California. It was built in 1922 and reconstructed in 1949, so it is 103 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 524 vehicles a day, roughly 19% of them trucks, projected to reach 914 by 2044. The structure is 26 ft (7.9 m) long and 29 ft wide. If it were closed, the detour would be 44.7 mi (72 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Gridley Colusa HWY over Lateral D Canal built?
It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1949.
What condition is Gridley Colusa HWY over Lateral D Canal 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 October 2024.
How much traffic does Gridley Colusa HWY over Lateral D Canal carry?
About 524 vehicles per day (2019 count), of which roughly 19% are trucks.
How long is Gridley Colusa HWY over Lateral D Canal?
The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 29 ft wide.
Who owns Gridley Colusa HWY over Lateral D Canal?
It is owned by the County Highway Agency.