Possum Point Power Station is a 650-acre site located approximately 30 miles south of Washington, D.C that overlooks the Potomac River and the Quantico Creek.
There are four generating units; two of which are natural gas fired, one is oil fired, and the other is a dual fired combined-cycle unit. Both Units 3 & 4 are fired using natural gas but were converted from coal in May of 2003. Unit 3 generates 96 MW and Unit 4 generates 220 MW.
Unit 5 is a 786 MW oil-fired unit (#6 low sulfur oil), and Unit 6 is the most recent unit to Possum Point fired by both natural gas and no. 2 oil. Dominion has retired Possum Point's two oldest units, Units 1 and 2.
Unit 6 is a 559 MW combined-cycle unit that went commercial in July of 2003. It is reliable, efficient and environmentally friendly.
The combined-cycle unit at Possum Point consists of two combustion turbines and a steam generator. The combustion turbines are basically large jet engines. Forced air, superheated by natural gas, turns a turbine to generate electricity. Exhaust from the combustion turbines is captured and used to produce steam to power another turbine. By recapturing the waste heat, combined-cycle units burn less fuel and produce fewer emissions than comparably sized conventional units.
A new 14-mile pipeline was provided due to the natural gas requirements for the Station. Approximately 85 percent of the pipeline is located within existing Dominion Virginia Power overhead electric transmission rights-of-way or on other Dominion Virginia Power property.