Keith Thurman Riffle, 75, of Scottville passed away on Thursday, September 14, 2017 at Spectrum Health Butterworth Hospital in Grand Rapids. Keith was born on December 28, 1941 in Sherman Township, the son of Thurman C. and Beatrice A. (Marrison) Riffle, and graduated from Mason County Eastern High School with the class of 1960. On November 9, 1963 he married the love…