State Route 99 SB over Mud Creek
GoodButte County, California · 03-BUT-099-R37.20 · Structure no. 12 0156L
- Built
- 1966
- 59 years old
- Condition
- Good
- inspected April 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 255 ft
- 6 main spans
- Daily traffic
- 9,500
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Mud Creek is a concrete continuous tee beam carrying State Route 99 SB over Mud Creek in Butte County, California. It was built in 1966, so it is 59 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 9,500 vehicles a day, projected to reach 17,684 by 2046. The structure is 255 ft (77.8 m) long and 34 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over Mud Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is State Route 99 SB over Mud 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 SB over Mud Creek carry?
About 9,500 vehicles per day (2020 count).
How long is State Route 99 SB over Mud Creek?
The structure is 255 ft (77.8 m) long with a longest span of 46 ft (14 m) and a deck 34 ft wide.
Who owns State Route 99 SB over Mud Creek?
It is owned by the State Highway Agency.