Interstate 805 over 47th Street
FairSan Diego County, California · 11-SD-805-11.36-SD · Structure no. 57 0647
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 199 ft
- 2 main spans
- Daily traffic
- 223,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 805 over 47th Street is a concrete continuous box beam or girders - multiple carrying Interstate 805 over 47th Street in San Diego County, California. It was built in 1975, so it is 50 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 6 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 223,000 vehicles a day, roughly 6% of them trucks, projected to reach 320,000 by 2046. The structure is 199 ft (60.7 m) long and 148 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 805 over 47th Street built?
It was built in 1975, making it 50 years old in 2025.
What condition is Interstate 805 over 47th 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 July 2024.
How much traffic does Interstate 805 over 47th Street carry?
About 223,000 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is Interstate 805 over 47th Street?
The structure is 199 ft (60.7 m) long with a longest span of 103 ft (31.4 m) and a deck 148 ft wide.
Who owns Interstate 805 over 47th Street?
It is owned by the State Highway Agency.