Essential Power Rock Springs is a gas turbine power plant located in Conowingo, Maryland, within the ReliabilityFirst Corporation NERC region. With an operating capacity of 666.9 MW, the facility plays a significant role in the PJM Interconnection power control area. The plant is operated by Cogentrix Energy Power Management, which is also its majority owner, under the holding company Quantum Energy Partners. As an unregulated facility, Essential Power Rock Springs utilizes gas as its primary fuel source, sourcing it through the Columbia Gas Transmission pipeline.