The incident happened at 800 West 1200 North in Saratoga Springs.
Officials say 31-year-old Nicholaus Blatnick of Salt Lake City was killed by an asphalt grinding machine at around 1:30 p.m.
Police say Blatnick's co-workers tried to revive him before emergency personnel arrived.
Saratoga Springs officials said Blatnick was a contractor working for Questar Gas.
The incident will be investigated by occupational safety officials.
Stay tuned to ABC 4 News and ABC4.com for more on this story.