Complex sentence: The river above the 56th Street bridge passes through the City of Temple Terrace and it is one of the many scenic portions of the river, the City has a river cleanup of its river portion twice a year.
Split into simpler sentences: The river above the 56th Street bridge passes through the City of Temple Terrace and it is one of the many scenic portions of the river. The City has a river cleanup of its river portion twice a year.