A worker of a private firm entrusted with the task of overburden removal in Open Cast II mining project was crushed to death by a tipper in Manuguru on Saturday. The deceased was identified as Sumanth, 25, of Vizianagaram district. According to police sources, Sumanth came under the wheels of a tipper while carrying out some repairs at an automobile garage near the OC II in Manuguru late in the afternoon. He had come to Manuguru along with a team of workers of a private firm which is tasked with the removal of overburden from the mining project, sources said.