Dorothy McCormack 91 Rock Rapids, Iowa October 8, 2018 Dorothy McCormack, 91, of Rock Rapids, Iowa, died Monday, Oct. 8, 2018, at Lyon Specialty Care, Rock Rapids. Funeral service was Saturday, Oct. 13, at United Methodist Church, Rock Rapids, with interment in Riverview Cemetery, Rock Rapids. Dorothy Tiedeman was born Jan. 15, 1927, near Hull,…