ECA Marcellus Trust I owns royalty interests in producing wells and horizontal natural gas development wells for Energy Corporation of America (ECA). The company owns royalty interests in 14 producing wells and 40 development wells located in the Greene County, Pennsylvania. Its royalty interests in the producing wells allow the company to receive 90% of the proceeds from the sale of production of natural gas attributable to ECA's interest in the producing wells; and 50% of the proceeds from the sale of production of natural gas attributable to ECA's interest in the development wells. The company was incorporated in 2010 and is based in Houston, Texas.