The 7 Largest Man-Made Lakes in the United States - Page 5 of 9

Fort Peck Lake, Montana

With a total capacity of 19,100,000 acre-feet, Fort Peck Lake ranks as the fifth-largest man-made lake in the United States. Fort Peck is a primary reservoir in Montana, built by the Fort Peck Dam in the Missouri River. It has an extensive shoreline that measures 1,520 miles in length, even longer than the coastline of California. Fort Peck Lake covers an entire surface area of 245,000 acres, and its deepest point measures 220 feet down. Fort Peck Lake was built primarily for flood control, water quality management, and hydroelectric power. Lying inside the Charles M. Russell National Wildlife Refuge, the reservoir also hosts many fish species.