Federal workplace safety regulators fined three businesses Tuesday over their failure to protect six Colorado dairy workers who were killed by exposure to highly toxic hydrogen sulfide gas after a manure pipe disconnected in an enclosed space.
The U.S. Occupational Safety and Health Administration announced proposed fines totaling $246,609 against the dairy owner and two contractors working on a manure management system. The deaths of five men and a teenager on Aug. 20, 2025, shocked the rural communities in and around Keenesburg, 35 miles (55 kilometers) northeast of Denver.
