Indianapolis, In. – On Wednesday the Indiana Utility Regulatory Commission approved Duke Energy’s plan to convert their coal-powered units at the west-central Cayuga Generating Station with natural gas versions. The Commission included an agreement with coal producers to study third-party operation of the retired coal units. The cost of Dukes conversion will be $3,3 Billion and add more than 470 megawatts to the aging facility’s current 1005 megawatt capacity. The Cayuga plant is the oldest coal-fired facility left in Duke’s Hoosier portfolio.