The operator of a crane that was moving a beam in a construction zone on Interstate 80 near Adair, Iowa was killed Tuesday when the crane toppled over.

The Iowa Department of Public Safety says 27-year-old Dustin Flinn of Atlantic was working for A.M. Cohron & Son, Inc. of Atlantic when the crane became top heavy and tipped over, falling through the bridge deck and onto the railroad tracks below.

The accident happened about 8 a.m. as crews were working to replace an I-80 bridge over the Iowa Interstate Railroad, about one mile west of Adair.