MERRILLVILLE â Northern Indiana Public Service Company LLC (NIPSCO), a subsidiary of NiSource Inc. (NYSE: NI), announced recently plans to retire two coal-fired units representing half of its R.M. Schahfer Generating Station capacity in Wheatfield, by the end of 2021. The retirements are part of NIPSCOâs broader, long-term electric generation strategy and customer-centric plan referred to as âYour Energy, Your Future.â The strategy outlines the companyâs plans to become 100% coal-free by 2028, while transitioning to reliable, lower-cost and more sustainable energy options. NIPSCO projects the transition will result in an estimated $4 billion in cost savings over the long term. The Schahfer Generating Station coal-fired units 14 and 15, designated for retirement this year, are among the oldest in NIPSCOâs fleet, having been in service since 1976 and 1979 respectively.