4th ST over Interstate 805
FairSan Diego County, California · 11-SD-805-10.88-NATC · Structure no. 57 0645
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 310 ft
- 2 main spans
- Daily traffic
- 8,950
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
4th ST over Interstate 805 is a prestressed concrete continuous box beam or girders - multiple carrying 4th ST over Interstate 805 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 8,950 vehicles a day, roughly 3% of them trucks, projected to reach 10,270 by 2044. The structure is 310 ft (94.4 m) long and 76 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 4th ST over Interstate 805 built?
It was built in 1975, making it 50 years old in 2025.
What condition is 4th ST 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 July 2024.
How much traffic does 4th ST over Interstate 805 carry?
About 8,950 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is 4th ST over Interstate 805?
The structure is 310 ft (94.4 m) long with a longest span of 154 ft (46.9 m) and a deck 76 ft wide.
Who owns 4th ST over Interstate 805?
It is owned by the State Highway Agency.