His coworkers described him as very intelligent, dedicated and a hard worker.
Tragedy struck Saturday when Robert Lee Irwin, 53, of Glasgow, was killed while doing maintenance on a Fossum Ready Mix truck at the Fossum gravel pit north of the city, investigators said.
He was found dead at the scene.
Valley County Sheriff Glen Meier described it a job-related accident.
Irwin had worked for Fossum for 34 years. The accident is still under investigation.
His obituary is on Page 6A.