Hyperion opponents plan event at Spink Residents and friends of Union County are invited to come spend Saturday at Spink on May 31, beginning at 2:30 p.m. at the Spink Caf�?©. A variety of speakers will present information and answer questions about the proposed Hyperion oil refinery. Union County residents will vote June 3 to decide whether the proposed site for the oil refinery can be rezoned from agricultural to industrial to allow construction of the refinery. Four different musical groups will perform between the information sessions throughout the afternoon and evening, with music ranging from classic folk and bluegrass to classic rock and classic country. Speakers will include: Mary Jo Stueve of Clean Water Action; Rich Smith, Adjunct Professor, Ecological Anthropology, University of Minnesota; Jim Heisinger, Professor Emeritus Biology, University of South Dakota (USD); and Dr. James Hoefelmeyer, Assistant Professor of Chemistry, USD. The musicians will include: acoustic duo Ed Johnson and Michelle Martin; Fiddler Nelson, an old time string band that plays in the Missouri Valley tradition; T. Wilson King, known as South Dakotaâ�?�?s King of Guitar; and the country and rock band Slingshot. Tours of the proposed oil refinery site will be available at no cost. Free horse drawn wagon rides also will be given. Food and drinks will be available. Everyone should bring lawn chairs. Spink is located on Highway 48, three miles east of exit 31 on Interstate 29. Saturday at Spink is sponsored by the Save Union County Ballot Question Committee.