ECA Marcellus Trust I (Trust) is a trust formed by Energy Corporation of America (ECA) to own royalty interests in 14 producing horizontal natural gas wells producing from the Marcellus Shale formation and located in Greene County, Pennsylvania (the Producing Wells) and royalty interests in 52 horizontal natural gas development wells to be drilled to the Marcellus Shale formation (the PUD Wells) within the Area of Mutual Interest consisted of 9,300 net acres held by ECA in Greene County, Pennsylvania. The royalty interest in the Producing Wells (the PDP Royalty Interest) allows the Trust to receive 90% of the proceeds (after deducting post-production costs and any applicable taxes) from the sale of production of natural gas attributable to ECA�s interest in the Producing Wells. The royalty interest in the PUD Wells allows the Trust to receive 50% of the proceeds from the sale of production of natural gas attributable to ECA�s interest in the PUD Wells.