Dorothy Dudick Feehan;78;of Monessen;died Thursday;May 18;2000;in Mon Valley Hospital.  She was born on Aug. 28;1921;in Belle Vernon;a daughter of the late David and Anna (Gall) Dudick.  Mrs.Feehan was a resident of the Belle Vernon and Monessen area all of her life;and was a 1940 graduate of North Belle Vernon High School.  She was a member of the Holy Resurrection Orthodox Church in Belle Vernon.  Survivors include her husband of 35 years;Joseph W.Feehan;two stepsons;Joseph P.and his wife Gloria Feehan of Woodsboro;Md.and Jack Feehan of Monessen; a stepdaughter;Marianne and her husband Jim Flickinger of Greensburg;a brother;Paul Dudick of Belle Vernon;a sister;Jean Maury of Charleston;S.C.; four grandchildren;Patrick;Sarah;Jake and Marc and three great-grandchildren;Justin;Connor and Brendan.  In addition to her parents;she was preceded in death by three brothers;Victor;Nick and Walter Dudick;and by two sisters;Helen Dudick and Ann Leque.  Friends will be received on Sunday from 2 to 4 and 7 to 9 p.m.in the DALFONSO-BILLICK FUNERAL HOME INC.;441 Reed Ave.;Monessen.  Family and friends will gather at the Holy Resurrection Orthodox Church;Mary Street;Belle Vernon;on Monday at 9:30 a.m.for funeral services;with Fr.John Kluchko officiating.  Parastas service will be held Sunday at 8 p.m.in the funeral home.  Interment will follow in Belle Vernon Cemetery.