Complex sentence: The Dardanelle Lock & Dam, constructed in the 1960s as a part of the McClellan-Kerr Navigation System, led to the formation of Lake Dardanelle, is a source of hydropower, and helps regulate river traffic on the Arkansas River.
Split into simpler sentences: The Dardanelle Lock & Dam, constructed in the 1960s as a part of the McClellan-Kerr Navigation System, led to the formation of Lake Dardanelle. It is a source of hydropower, and helps regulate river traffic on the Arkansas River.