Northern Power Station is located in Port Augusta, South Australia. It is coal powered with two 260 MWsteam turbines that generate a total of 520 MW of electricity. It is operated and maintained by Flinders Power employees and was commissioned as a 544MW first order base load power station in 1985. Northern receives coal by rail from the Leigh Creek Coal Mine, 280 km to the north. Pending exhaustion of the coal deposits of Leigh Creek has led to concept level proposals emerging for the replacement of the plant with either a gas-fired, a concentrated solar thermal or a nuclear power plant. In 2013, Alinta Energy announced that it was investigating developing a new low-grade coal deposit which could extend the working lives of both Northern and adjacent Playford B power stations until the year 2030.Alinta Energy claims that the Northern Power Station is the lowest conventional marginal cost electricity generator in South Australia. As of 2013, the Northern Power Station only runs for six months of the year.
Northern Power Station draws cooling water from Upper Spencer Gulf and returns it to the sea at an elevated temperature. The water is returned 7 °C warmer than the original intake water. The flow rate is 47 m³ per second. Its outfall channel is intended to be used by Sundrop Farms to disperse desalination brine from a proposed seawater desalination plant to be constructed in 2015.