Patricia J. (Flaherty) Stevenson, 77, of the North Side, passed away on Tuesday, November 13, 2012. She was the wife of the late Carl G. Stevenson. Beloved mother of Alice Vance, Laura Wilson, Jacqueline Ussack, Billie Kissel and the late Helen McKay. Sister of Judy Simmons, Robert Flaherty, Geraldine and the late Georgie and Jimmy Flaherty. Also survived by ten grandchildren and sixteen great-grandchildren. Visitation was private. A memorial service for Patricia and her daughter Helen will be held on Saturday, December 1, 2012 at 1 p.m. in the Tarentum American Legion, 57 Superior Road, Tarentum, PA 15084. Funeral arrangements have been personalized by the Heard Funeral Home, Inc., 4047 Perrysville Avenue, Observatory Hill.