Interstate 15 NB over Cajon Creek / Cajon Blvd
FairSan Bernardino County, California · 08-SBD-015-16.07 · Structure no. 54 0781R
- Built
- 1969
- 56 years old, rebuilt 2016
- Condition
- Fair
- inspected January 2025
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 553 ft
- 6 main spans
- Daily traffic
- 69,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Cajon Creek / Cajon Blvd is a concrete continuous box beam or girders - multiple carrying Interstate 15 NB over Cajon Creek / Cajon Blvd in San Bernardino County, California. It was built in 1969 and reconstructed in 2016, so it is 56 years old, older 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 69,500 vehicles a day, roughly 11% of them trucks, projected to reach 93,000 by 2042. The structure is 553 ft (168.6 m) long and 102 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 15 NB over Cajon Creek / Cajon Blvd built?
It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2016.
What condition is Interstate 15 NB over Cajon Creek / Cajon Blvd 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 January 2025.
How much traffic does Interstate 15 NB over Cajon Creek / Cajon Blvd carry?
About 69,500 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is Interstate 15 NB over Cajon Creek / Cajon Blvd?
The structure is 553 ft (168.6 m) long with a longest span of 100 ft (30.5 m) and a deck 102 ft wide.
Who owns Interstate 15 NB over Cajon Creek / Cajon Blvd?
It is owned by the State Highway Agency.