"the allegheny and monongahela rivers merge to form the mighty ohio river" in German The Allegheny and Monongahela Rivers merge to form the mighty Ohio River. Der Allegheny und der Monongahela vereinigen sich zum mächtigen Ohio. Detailed translations for "the allegheny and monongahela rivers merge to form the mighty ohio river" The Allegheny and Monongahela Rivers merge to form the mighty Ohio River. The Allegheny and Monongahela Rivers merge to form the mighty Ohio River. Der Allegheny und der Monongahela vereinigen sich zum mächtigen Ohio.