State Route 99 over Rock Creek
GoodButte County, California · 03-BUT-099-40.65 · Structure no. 12 0027
- Built
- 1950
- 75 years old, rebuilt 2017
- Condition
- Good
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 145 ft
- 6 main spans
- Daily traffic
- 11,600
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Rock Creek is a concrete continuous slab carrying State Route 99 over Rock Creek in Butte County, California. It was built in 1950 and reconstructed in 2017, so it is 75 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 11,600 vehicles a day, roughly 9% of them trucks, projected to reach 21,838 by 2046. The structure is 145 ft (44.3 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over Rock Creek built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2017.
What condition is State Route 99 over Rock Creek 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 April 2024.
How much traffic does State Route 99 over Rock Creek carry?
About 11,600 vehicles per day (2020 count), of which roughly 9% are trucks.
How long is State Route 99 over Rock Creek?
The structure is 145 ft (44.3 m) long with a longest span of 26 ft (7.9 m) and a deck 43 ft wide.
Who owns State Route 99 over Rock Creek?
It is owned by the State Highway Agency.