State Route 99 SB over Cosumnes River Overflow
GoodSacramento County, California · 03-SAC-099-7.45 · Structure no. 24 0022L
- Built
- 1958
- 67 years old, rebuilt 1989
- Condition
- Good
- inspected January 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 157 ft
- 4 main spans
- Daily traffic
- 31,500
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Cosumnes River Overflow is a concrete continuous tee beam carrying State Route 99 SB over Cosumnes River Overflow in Sacramento County, California. It was built in 1958 and reconstructed in 1989, so it is 67 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 31,500 vehicles a day, roughly 18% of them trucks, projected to reach 56,992 by 2046. The structure is 157 ft (47.9 m) long and 41 ft wide. If it were closed, the detour would be 19.9 mi (32 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 SB over Cosumnes River Overflow built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1989.
What condition is State Route 99 SB over Cosumnes River Overflow 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 January 2024.
How much traffic does State Route 99 SB over Cosumnes River Overflow carry?
About 31,500 vehicles per day (2019 count), of which roughly 18% are trucks.
How long is State Route 99 SB over Cosumnes River Overflow?
The structure is 157 ft (47.9 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.
Who owns State Route 99 SB over Cosumnes River Overflow?
It is owned by the State Highway Agency.