Interstate 15 over Ninth Avenue
GoodSan Diego County, California · 11-SD-015-R30.09-ESD · Structure no. 57 0808
- Built
- 1977
- 48 years old, rebuilt 2012
- Condition
- Good
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 197 ft
- 1 main span
- Daily traffic
- 99,500
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 over Ninth Avenue is a prestressed concrete box beam or girders - multiple carrying Interstate 15 over Ninth Avenue in San Diego County, California. It was built in 1977 and reconstructed in 2012, so it is 48 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 99,500 vehicles a day, roughly 7% of them trucks, projected to reach 168,000 by 2042. The structure is 197 ft (60 m) long and 206 ft wide.
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 Interstate 15 over Ninth Avenue built?
It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2012.
What condition is Interstate 15 over Ninth Avenue 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 March 2024.
How much traffic does Interstate 15 over Ninth Avenue carry?
About 99,500 vehicles per day (2018 count), of which roughly 7% are trucks.
How long is Interstate 15 over Ninth Avenue?
The structure is 197 ft (60 m) long with a longest span of 196 ft (59.7 m) and a deck 206 ft wide.
Who owns Interstate 15 over Ninth Avenue?
It is owned by the State Highway Agency.