State Route 99 over Butler Slough
GoodTehama County, California · 02-TEH-099-19.54 · Structure no. 08 0013
- Built
- 1924
- 101 years old, rebuilt 2000
- Condition
- Good
- inspected May 2024
- Type
- Tee Beam
- Concrete
- Length
- 120 ft
- 4 main spans
- Daily traffic
- 9,300
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Butler Slough is a concrete tee beam carrying State Route 99 over Butler Slough in Tehama County, California. It was built in 1924 and reconstructed in 2000, so it is 101 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 9,300 vehicles a day, roughly 14% of them trucks, projected to reach 8,981 by 2046. The structure is 120 ft (36.6 m) long and 55 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over Butler Slough built?
It was built in 1924, making it 101 years old in 2025. It was reconstructed in 2000.
What condition is State Route 99 over Butler 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 May 2024.
How much traffic does State Route 99 over Butler Slough carry?
About 9,300 vehicles per day (2015 count), of which roughly 14% are trucks.
How long is State Route 99 over Butler Slough?
The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 55 ft wide.
Who owns State Route 99 over Butler Slough?
It is owned by the State Highway Agency.