Devere Const was removing transformer for Alpena Power Co on the Lafarge site. While cutting the north side a fire started. At apprx 4:55P Devere contacted Lafarge Control reporting a fire. The Alpena City Fire Dept was also dispatched. They arrived on scene at 5PM and were on site until apprx 7PM. Fire was contained w/in transformer. MSHA call center was contacted at 5:05P