Avenue 21 1/2 over SR 99
GoodMadera County, California · 06-MAD-099-20.90 · Structure no. 41 0071
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected November 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 297 ft
- 2 main spans
- Daily traffic
- 500
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
Avenue 21 1/2 over SR 99 is a prestressed concrete continuous box beam or girders - multiple carrying Avenue 21 1/2 over SR 99 in Madera County, California. It was built in 2009, so it is 16 years old, younger 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 500 vehicles a day, roughly 10% of them trucks, projected to reach 1,048 by 2044. The structure is 297 ft (90.4 m) long and 59 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Avenue 21 1/2 over SR 99 built?
It was built in 2009, making it 16 years old in 2025.
What condition is Avenue 21 1/2 over SR 99 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 November 2024.
How much traffic does Avenue 21 1/2 over SR 99 carry?
About 500 vehicles per day (2010 count), of which roughly 10% are trucks.
How long is Avenue 21 1/2 over SR 99?
The structure is 297 ft (90.4 m) long with a longest span of 146 ft (44.4 m) and a deck 59 ft wide.
Who owns Avenue 21 1/2 over SR 99?
It is owned by the State Highway Agency.