Leroy Holden Hamel, 91, lifelong resident of Haverhill, died March 16, at The Meadows, North Andover. He was the husband of 55 years of the late JoAnn Catherine (Mahoney) Hamel. Born Sept. 3, 1924 in Haverhill, he was one of nine children of the late Napoleon and Clarabelle (Hanks) Hamel. Hamel a