DONALD DIETZ Donald C. Dietz, 81, of Waterloo died Oct. 12, 2016. Visitation from 4 to 8 p.m. Friday and from 8 to 9:30 a.m. Saturday at the funeral home. Mass at 10 a.m. Saturday at Ss. Peter & Paul Church, Waterloo. Burial in the church cemetery. Quernheim Funeral Home, Waterloo.