The expansion of POET Biorefining – Big Stone from a nameplate production capacity of 40 to 75 million gallons per year is now complete, according to the company. The $42 million construction project began in April of last year and was completed at the end of May.

Located approximately 6.5 miles northeast of Milbank, S.D., POET Biorefining – Big Stone started as a 40 MGPY ethanol production facility in July, 2002. Big Stone is one of six POET ethanol production facilities in the state of South Dakota. With this expansion completed, those six plants have an annual production capacity of more than 310 million gallons. POET Biorefining – Chancellor recently started construction on an expansion that will double its production to 100 million gallons per year.