| 1989 San Bernardino train wreck and pipeline rupture | |
|---|---|
 A destroyed locomotive and hopper cars following the derailment.
    | |
| Details | |
| Date | May 12, 1989 7:36 a.m. PDT |
| Location | San Bernardino, California, United States |
| Coordinates | 34°08′15″N 117°20′39″W / 34.13750°N 117.34417°W |
| Country | United States |
| Line | Cajon Pass |
| Operator | Southern Pacific |
| Incident type | Runaway train, derailment, and subsequent pipeline explosion |
| Cause | Train derailment: Train weight miscalculated and several locomotives with inoperative dynamic brakes. Pipeline rupture: undetected damage to pipeline during cleanup |
| Statistics | |
| Trains | 1 (SP 7551 East) |
| Crew | 5 |
| Deaths | 6 (4 by derailment, 2 by pipeline) |
| Injured | 4 |
The San Bernardino train disaster (sometimes known as the Duffy Street incident), was a combination of two separate but related incidents that occurred in San Bernardino, California, United States: a runaway train derailment on May 12, 1989; and the subsequent failure on May 25, 1989, of the Calnev Pipeline, a petroleum pipeline adjacent to the tracks which was damaged by earth-moving equipment during the crash cleanup.