Interstate 15 over Fourth Street
GoodSan Bernardino County, California · 08-SBD-015-3.05-RCUC · Structure no. 54 0912
- Built
- 1974
- 51 years old, rebuilt 2011
- Condition
- Good
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 161 ft
- 1 main span
- Daily traffic
- 204,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 over Fourth Street is a prestressed concrete box beam or girders - multiple carrying Interstate 15 over Fourth Street in San Bernardino County, California. It was built in 1974 and reconstructed in 2011, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 204,000 vehicles a day, roughly 10% of them trucks, projected to reach 220,015 by 2042. The structure is 161 ft (49 m) long and 222 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 over Fourth Street built?
It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2011.
What condition is Interstate 15 over Fourth Street in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.
How much traffic does Interstate 15 over Fourth Street carry?
About 204,000 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is Interstate 15 over Fourth Street?
The structure is 161 ft (49 m) long with a longest span of 161 ft (49 m) and a deck 222 ft wide.
Who owns Interstate 15 over Fourth Street?
It is owned by the State Highway Agency.