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Six Dead in Confined-Space Incident at Colorado Dairy Farm

Officials are investigating possible toxic-gas exposure at Prospect Valley Dairy.

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A dairy cow grazes in a pasture at Pineland Farms, Wednesday, May 28, 2025, in New Gloucester, Maine.
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An aerial view of Prospect Ranch Dairy in Weld County, east of Keenesburg, Colo., on Aug. 21, 2025.

Overview

  • Fire crews dispatched around 6 p.m. on Aug. 20 to Prospect Valley Dairy near Keenesburg recovered six deceased individuals from a confined space.
  • The Weld County Coroner says all victims were male and Hispanic, most were adults with one possibly 17, and identities will be released after next-of-kin notifications.
  • Investigators are treating the case as a potential toxic-gas exposure, with autopsies and toxicology testing underway to determine cause and manner of death.
  • The Weld County Sheriff's Office reported no evidence of criminal activity at the site.
  • OSHA has opened an inspection, three other people treated at a Greeley hospital have been released, and a local district confirmed one victim was a Highland High School student.