Interstate 15 NB over Mesa Rock RD
GoodSan Diego County, California · 11-SD-015-R34.89 · Structure no. 57 0893R
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 148 ft
- 1 main span
- Daily traffic
- 70,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Mesa Rock RD is a prestressed concrete box beam or girders - multiple carrying Interstate 15 NB over Mesa Rock RD in San Diego County, California. It was built in 1978, so it is 47 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 70,000 vehicles a day, roughly 10% of them trucks, projected to reach 99,500 by 2045. The structure is 148 ft (45.1 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 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 Interstate 15 NB over Mesa Rock RD built?
It was built in 1978, making it 47 years old in 2025.
What condition is Interstate 15 NB over Mesa Rock RD 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 June 2024.
How much traffic does Interstate 15 NB over Mesa Rock RD carry?
About 70,000 vehicles per day (2020 count), of which roughly 10% are trucks.
How long is Interstate 15 NB over Mesa Rock RD?
The structure is 148 ft (45.1 m) long with a longest span of 147 ft (44.8 m) and a deck 69 ft wide.
Who owns Interstate 15 NB over Mesa Rock RD?
It is owned by the State Highway Agency.