Neptune Regional Transmission System, LLC (Neptune RTS) developed, permitted, financed, built, and now owns and operates the Neptune Project, a 65 mile undersea and underground high voltage direct current (HVDC) transmission line that extends under water and underground from Sayreville, New Jersey to Nassau County on Long Island. Neptune provides up to 660 MW of power to Long Island electricity consumers'enough for 600,000 homes'and supplies more than 20 percent of Long Island's typical electricity demand. Neptune began construction in June 2005 and was completed in June 2007, on budget and ahead of schedule.