Richard Eugene Kostelac;19;of 222 Charles St.;Belle Vernon;died Wednesday;June 30;1971;at 7:50 while swimming in the Monongahela River. The youth failed to surface after plunging into the water from an 85-foot pier. His body was recovered about an hour later through the combined efforts of scuba divers and firemen from Belle Vernon;Fayette City and Greensburg. His body was found in 15 feet of water about 70 feet from shore by Darwin Bethem;scuba diver with the Belle Vernon Fire Department. State Police said Kostelac had been swimming with companions at the abandoned Colonial Docks located about 1.5 miles north of Newell in Jefferson Twp. Police said approximately 20 persons were in the swimming area when the fatal dive was made. The youth was born Feb.21;1952. He was employed as a millwright helper at the Allenport Plant of Wheeling-Pittsburgh Steel Corp. He is survived by his parents;Joseph A.and Helen Diggins Kostelac;a brother;Joseph Jr.;at home;two sisters;Mrs.Richard (Bonnie) Wilson of Monessen and Mrs.Sheri Kulik of Belle Vernon;maternal grandmother;Mrs.Violet Brouse of Altoona;and step-grandfather;Judson Brouse. Friends are being received at the Howard McCrory Funeral Home;Fayette City;where services will be at 1:30 p.m.Saturday with the Rev.Donald Dilley;of Marion Presbyterian Church of Fairhope;officiating. Burial will be in Belle Vernon Cemetery.