Interstate 15 NB over Baseline Road
FairSan Bernardino County, California · 08-SBD-015-6.71-RCUC · Structure no. 54 0974R
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 568 ft
- 5 main spans
- Daily traffic
- 78,500
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Baseline Road is a prestressed concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Baseline Road in San Bernardino County, California. It was built in 1976, so it is 49 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 78,500 vehicles a day, roughly 8% of them trucks, projected to reach 100,000 by 2040. The structure is 568 ft (173.1 m) long and 69 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 15 NB over Baseline Road built?
It was built in 1976, making it 49 years old in 2025.
What condition is Interstate 15 NB over Baseline Road 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 March 2023.
How much traffic does Interstate 15 NB over Baseline Road carry?
About 78,500 vehicles per day (2017 count), of which roughly 8% are trucks.
How long is Interstate 15 NB over Baseline Road?
The structure is 568 ft (173.1 m) long with a longest span of 129 ft (39.3 m) and a deck 69 ft wide.
Who owns Interstate 15 NB over Baseline Road?
It is owned by the State Highway Agency.