Lake Norfork was created by a huge concrete wall called the Norfork Dam. The construction began in 1941 and ended on June 4, 1944. Soon after, the electric power plant was built. The dam created a reservoir, which had a shoreline of 510 miles and contains almost two million acre-feet of water. Few citizens could have envisioned the degree and speed at which economic change occurred, especially in Mountain Home, which was the largest community near the dam site. Water sports such as boating, water skiing, skin diving, wind surfing, and swimming are provided by the 20 developed parks.