Interstate 15 NB over Route 8
FairSan Diego County, California · 11-SD-015-R6.10-SD · Structure no. 57 0373R
- Built
- 1960
- 65 years old, rebuilt 1996
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 311 ft
- 4 main spans
- Daily traffic
- 113,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Route 8 is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 15 NB over Route 8 in San Diego County, California. It was built in 1960 and reconstructed in 1996, so it is 65 years old, older 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 113,000 vehicles a day, roughly 2% of them trucks, projected to reach 155,000 by 2041. The structure is 311 ft (94.8 m) long and 84 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 Route 8 built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1996.
What condition is Interstate 15 NB over Route 8 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 July 2023.
How much traffic does Interstate 15 NB over Route 8 carry?
About 113,000 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is Interstate 15 NB over Route 8?
The structure is 311 ft (94.8 m) long with a longest span of 83 ft (25.3 m) and a deck 84 ft wide.
Who owns Interstate 15 NB over Route 8?
It is owned by the State Highway Agency.