Stockton Lake is a reservoir located in southeastern Cedar County, northeastern Dade County, and southwestern Polk County, Missouri. The lake is 'V' shaped, and covers , with of shoreline. It has three marinas, and 10 public-use areas. It has a "non-development policy," and is surrounded by unspoiled, tree-covered hills. Its banks are owned and operated by the Army Corps of Engineers. Stockton Lake is one of Missouri's seven major lakes, all man-made. It was formed by damming the Sac River near the city of Stockton in 1969. The lake is crossed by three state highways over a network of six bridges. A pipeline carries water from Stockton Lake to Fellows Lake in northern Greene County to help supplement water for the city of Springfield. Stockton lake has numerous coves protected from the wind making it a great lake to wakeboard, water ski or other water sports. Stockton Dam and hydroelectric power plant After the USACE construction was complete on the dam, the lake began filling in 1969. The dam rises above the Sac River streambed. The lake is about with of shoreline. Normal pool is at 867 feet above mean sea level (msl) with storage of . The flood storage capacity of the lake is of water at an elevation of 892 ft msl, during which the surface area of the reservoir grows to . Stockton Lake is operated primarily for flood control and hydroelectric generation and originally had an installed capacity of 45.2 MW in a single electric generator. The original powerhouse of the dam had a single six-bladed Kaplan turbine designed by Newport News Shipbuilding and Dry Dock Company and a General Electric generator rated at 45.2 MW. The original turbine was placed in service in 1973. After years of heavy vibration and a poorly matched turbine design, one of the blades catastrophically failed in February 2009, causing an immediate shutdown of the plant. The sheared off blade, weighing , was later recovered from the river. The turbine runner was repaired in 2010 by welding the old blade back in place. Other cracks were also discovered and repaired at this time. While the repaired turbine was operating, the Corps of Engineers and contractors tried to determine how to correct the issues at Stockton Dam. Analysis concluded that the original turbine was likely rated for a much different site due to its ability to spin at nearly full power