Complex sentence: East Branch Clarion River Lake in Elk County, Pennsylvania, in the United States was constructed by the U.S. Army Corps of Engineers by damming the East Branch of the Clarion River.
Split into simpler sentences: East Branch Clarion River Lake, or East Branch Lake is a man made lake in Elk County, Pennsylvania, in the United States. It was constructed by the U.S. Army Corps of Engineers by damming the East Branch of the Clarion River.