Interstate 15 NB over Rock Springs Road
FairSan Diego County, California · 11-SD-015-R31.99 · Structure no. 57 0817R
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected March 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 204 ft
- 1 main span
- Daily traffic
- 62,500
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Rock Springs Road is a prestressed concrete box beam or girders - multiple carrying Interstate 15 NB over Rock Springs Road in San Diego County, California. It was built in 1977, 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 62,500 vehicles a day, roughly 10% of them trucks, projected to reach 99,500 by 2042. The structure is 204 ft (62.2 m) long and 70 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 NB over Rock Springs Road built?
It was built in 1977, making it 48 years old in 2025.
What condition is Interstate 15 NB over Rock Springs Road 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 March 2024.
How much traffic does Interstate 15 NB over Rock Springs Road carry?
About 62,500 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is Interstate 15 NB over Rock Springs Road?
The structure is 204 ft (62.2 m) long with a longest span of 203 ft (61.9 m) and a deck 70 ft wide.
Who owns Interstate 15 NB over Rock Springs Road?
It is owned by the State Highway Agency.