Market Wire reports that Green Plains Renewable Energy, Inc. recently completed production of the first million gallons of ethanol at its new Superior, Iowa facility. The plant''s anticipated operational capacity is 55 million gallons of ethanol per year. Additionally, the plant is expected to produce 175,000 tons of distiller grains per year. Superior operations were initiated on July 7, 2008. The Superior site was selected because of the abundance of corn in the region. Green Plains owns and operates grain elevators at seven locations in the immediate vicinity.