Interstate 8 over Main Street
FairSan Diego County, California · 11-SD-008-14.59-ECJ · Structure no. 57 0363
- Built
- 1961
- 64 years old, rebuilt 1968
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Concrete
- Length
- 79 ft
- 1 main span
- Daily traffic
- 192,000
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 8 over Main Street is a concrete box beam or girders - multiple carrying Interstate 8 over Main Street in San Diego County, California. It was built in 1961 and reconstructed in 1968, so it is 64 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 192,000 vehicles a day, roughly 5% of them trucks, projected to reach 238,000 by 2044. The structure is 79 ft (24.1 m) long and 142 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 8 over Main Street built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1968.
What condition is Interstate 8 over Main Street 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 June 2024.
How much traffic does Interstate 8 over Main Street carry?
About 192,000 vehicles per day (2014 count), of which roughly 5% are trucks.
How long is Interstate 8 over Main Street?
The structure is 79 ft (24.1 m) long with a longest span of 79 ft (24.1 m) and a deck 142 ft wide.
Who owns Interstate 8 over Main Street?
It is owned by the State Highway Agency.