Lewis Yost 1954-2019 Lewis Yost, 65 of Martinsburg, died Tuesday, October 29, 2019 at Berkeley Medical Center. Born September 22, 1954 in Berkeley Springs, he was the son of the late Glenn S. Yost and Pauline (Walls) Yost. He was employed by U.S. Silica in Berkeley Springs for 45 years. He is survived by his . . .