Petersburg Generating Station is a major coal-fired power plant in Indiana, rated at 2.146-GW nameplate capacity. It is located on the White River near Petersburg in Pike County, Indiana, just 1 mi upstream from a much smaller coal-fired Frank E. Ratts Generating Station. Petersburg G.S. is owned and operated by AES Indiana (formerly known as Indianapolis Power & Light). Units 1, 2, and 3, rated at 281.6, 523.3, and 670.9 MWe, were launched into operation in 1967, 1969, and 1977 respectively. Unit 4, rated at 670.9 MWe, was launched in 1986. There are also three minor oil-burning internal combustion units, rated at 2.7 MWe each, all launched in 1967.