LA Grande RD over Glenn Valley Slough
GoodColusa County, California · 1.0 MI W of Danley RD · Structure no. 15C0169
- Built
- 1971
- 54 years old
- Condition
- Good
- inspected December 2024
- Type
- Slab
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 35
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
LA Grande RD over Glenn Valley Slough is a concrete slab carrying LA Grande RD over Glenn Valley Slough in Colusa County, California. It was built in 1971, so it is 54 years old, younger 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 35 vehicles a day, roughly 1% of them trucks, projected to reach 111 by 2046. The structure is 30 ft (9 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| 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 LA Grande RD over Glenn Valley Slough built?
It was built in 1971, making it 54 years old in 2025.
What condition is LA Grande RD over Glenn Valley Slough 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 December 2024.
How much traffic does LA Grande RD over Glenn Valley Slough carry?
About 35 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is LA Grande RD over Glenn Valley Slough?
The structure is 30 ft (9 m) long with a longest span of 28 ft (8.5 m) and a deck 27 ft wide.
Who owns LA Grande RD over Glenn Valley Slough?
It is owned by the County Highway Agency.