Prospect Avenue over Interstate 805
FairSan Diego County, California · 11-SD-805-9.48-NATC · Structure no. 57 0751
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 301 ft
- 2 main spans
- Daily traffic
- 3,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Prospect Avenue over Interstate 805 is a prestressed concrete continuous box beam or girders - multiple carrying Prospect Avenue over Interstate 805 in San Diego County, California. It was built in 1974, so it is 51 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 3,500 vehicles a day, roughly 1% of them trucks, projected to reach 6,161 by 2044. The structure is 301 ft (91.7 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 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 Prospect Avenue over Interstate 805 built?
It was built in 1974, making it 51 years old in 2025.
What condition is Prospect Avenue over Interstate 805 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 Prospect Avenue over Interstate 805 carry?
About 3,500 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is Prospect Avenue over Interstate 805?
The structure is 301 ft (91.7 m) long with a longest span of 171 ft (52.1 m) and a deck 47 ft wide.
Who owns Prospect Avenue over Interstate 805?
It is owned by the State Highway Agency.