Complex sentence: The Head of the Schuylkill, founded in 1971 by three members of the University Barge Club, was intended to open up the head-racing season to Club rowers in an era when most headraces were held for Junior, University, and Elite rowers.
Split into simpler sentences: The Head of the Schuylkill was founded in 1971 by three members of the University Barge Club. The race was intended to open up the head-racing season to Club rowers as most headraces were held for Junior, University, and Elite rowers.