OSHA Accident Investigation · Summary #14550677
UTAH POWER & LIGHT CO
PRESTON, ID—
Event description
Employees Washed into River by High Pressure Water
Investigation abstract
A penstock at a hydroelectric plant ruptured at a welded area. The rupture resul ted from a water hammer caused by a malfunctioning Johnson valve. Water, escapin g at approximately 3,000 cubic feet per second, washed seven vehicles, a 70- by 40-foot building, and the parking lot into the river. Employees #1 through 4, wh o were in vehicles, drowned, and Employee #5 was injured when he was swept ashor e. Employee #5 was hospitalized for his injuries.
Victims (5)
-
#1 Fatality Age 46 M
- Nature of injury
- 21
- Part of body
- 28
- Event type
- 14
- Source
- 41
- Occupation code
- 999
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
-
#2 Fatality Age 47 M
- Nature of injury
- 21
- Part of body
- 28
- Event type
- 14
- Source
- 41
- Occupation code
- 999
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
-
#3 Fatality Age 31 M
- Nature of injury
- 21
- Part of body
- 28
- Event type
- 14
- Source
- 41
- Occupation code
- 999
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
-
#4 Fatality Age 32 M
- Nature of injury
- 21
- Part of body
- 28
- Event type
- 14
- Source
- 41
- Occupation code
- 999
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
-
#5 Hospitalized Age 25 M
- Nature of injury
- 20
- Part of body
- 16
- Event type
- 6
- Source
- 41
- Occupation code
- 999
- Human factor
- 17
- Environmental factor
- 18
- Task assigned
- 1
Codes shown verbatim from OSHA's accident-investigation database. A human-readable decoder is coming in a future release once the accident_lookup2 dictionary is loaded.