State Route 99 over 21st Ave
GoodSacramento County, California · 03-SAC-099-22.59-SAC · Structure no. 24 0154
- Built
- 1959
- 66 years old, rebuilt 1974
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 193,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over 21st Ave is a concrete box beam or girders - multiple carrying State Route 99 over 21st Ave in Sacramento County, California. It was built in 1959 and reconstructed in 1974, so it is 66 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 193,000 vehicles a day, roughly 5% of them trucks, projected to reach 324,816 by 2042. The structure is 51 ft (15.5 m) long and 140 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over 21st Ave built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1974.
What condition is State Route 99 over 21st Ave 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 February 2024.
How much traffic does State Route 99 over 21st Ave carry?
About 193,000 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is State Route 99 over 21st Ave?
The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 140 ft wide.
Who owns State Route 99 over 21st Ave?
It is owned by the State Highway Agency.