Donald Clark Cass, age 70, of Gillette, WY died at Campbell County Memorial Hospital on Tuesday, March 25, 2008 of an aneurism. A private cremation service has taken place, and in accordance with his wishes, no funeral service will be held.Donald Cass was born March 9, 1938, the son of Clark and Margaret (Cavanaugh) Cass in Harlowton, MT. In September of 1980, he married Irene Davidson. Donald has worked as a conductor for the Burlington Northern Railroad for over 30 years. Donald is survived by his loving wife, children and grandchildren.A memorial has been established in Donald's name and can be sent to the Walker Funeral Home, 410 Medical Arts Court, Gillette, WY 82716. Condolences may be sent via the internet at www.walkerfuneralgillette.com