Interstate 15 over Mira Mesa Blvd
FairSan Diego County, California · 11-SD-015-M15.92-SD · Structure no. 57 0597
- Built
- 1977
- 48 years old, rebuilt 2011
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 174 ft
- 2 main spans
- Daily traffic
- 283,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 over Mira Mesa Blvd is a concrete continuous box beam or girders - multiple carrying Interstate 15 over Mira Mesa Blvd in San Diego County, California. It was built in 1977 and reconstructed in 2011, 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 283,000 vehicles a day, roughly 6% of them trucks, projected to reach 313,830 by 2040. The structure is 174 ft (53 m) long and 304 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Mira Mesa Blvd built?
It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2011.
What condition is Interstate 15 over Mira Mesa Blvd in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does Interstate 15 over Mira Mesa Blvd carry?
About 283,000 vehicles per day (2019 count), of which roughly 6% are trucks.
How long is Interstate 15 over Mira Mesa Blvd?
The structure is 174 ft (53 m) long with a longest span of 87 ft (26.5 m) and a deck 304 ft wide.
Who owns Interstate 15 over Mira Mesa Blvd?
It is owned by the State Highway Agency.