CLEVELAND - Cliffs Natural Resources announced Friday that a distinguished figure in the mining industry, James Trethewey, passed away in Chautauqua, N.Y.
A long-time resident of the Cleveland area, he graduated from Michigan Tech University in Houghton with a degree in business administration and accounting.
Trethwey began his mining career at White Pine Copper Co. as a general auditor. In 1972, he joined Cleveland-Cliffs as a cost analyst in its Ishpeming office, taking on various roles over the years with increasing responsibility, most of which were senior leadership roles, including mine controller at Cliffs' former Sherman Mine in Temagami, Ontario; group controller of Cliffs' North American Iron Ore Mines; controller in the mid-1980s; vice president and controller in the late 1980s; senior vice president of operations in the late-1990s; and eventually retiring as Cliffs' senior vice president of business development with 35 years of service and 40 years overall in the mining industry.
Along the way, he earned his master's of business administration from Baldwin-Wallace College and was active in the American Mining Association, the Society of Mining Engineers, as well as other industry-related associations.
After his retirement in 2007, Trethewey remained active in social, business and industry activities through participation on boards in the steel industry, charitable organizations and business partnerships.
He was named to the board of directors of Steel Dynamics in 2012, was a member of the MTU Advisory Board for the School of Business and Economics and served as a trustee of the Michigan Tech Fund. Earlier this year, he was named a distinguished alumnus by the MTU Alumni Association.