State Route 99 over Vallombrosa Big Chico
GoodButte County, California · 03-BUT-099-R32.61-CHC · Structure no. 12 0151
- Built
- 1963
- 62 years old, rebuilt 2014
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 762 ft
- 14 main spans
- Daily traffic
- 24,750
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Vallombrosa Big Chico is a concrete continuous box beam or girders - multiple carrying State Route 99 over Vallombrosa Big Chico in Butte County, California. It was built in 1963 and reconstructed in 2014, so it is 62 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 24,750 vehicles a day, roughly 7% of them trucks, projected to reach 46,000 by 2041. The structure is 762 ft (232.3 m) long and 118 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 State Route 99 over Vallombrosa Big Chico built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2014.
What condition is State Route 99 over Vallombrosa Big Chico 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 2023.
How much traffic does State Route 99 over Vallombrosa Big Chico carry?
About 24,750 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is State Route 99 over Vallombrosa Big Chico?
The structure is 762 ft (232.3 m) long with a longest span of 62 ft (18.9 m) and a deck 118 ft wide.
Who owns State Route 99 over Vallombrosa Big Chico?
It is owned by the State Highway Agency.