The proposed changes to Interstate Power and Light Company’s (IPL’s) generating fleet will be filed with the Iowa Utilities Board (IUB) as part of IPL’s application for ratemaking principles for the proposed Sutherland Generating Station Unit 4 and are subject to the approval of the IUB and the Minnesota Public Utility Commission. IPL expects to make the filing in the later part of the first quarter of 2008.

As part of its greenhouse gas emissions reduction proposal, IPL will retire Lansing Generating Station’s coal-fired Units 2 and 3. In addition, the company will permanently switch the fuel source of its Dubuque Generating Station Units from coal to natural gas. This will reduce these units’ maximum potential to emit carbon dioxide by more than 800,000 tons per year, the company said.

Tom Aller, president of IPL, said: We, alone, have an obligation to serve our customers and this plan fulfills that obligation by providing our customers with safe, reliable and environmentally responsible energy. Our proposal improves Iowa’s air quality and environment while providing a reliable energy supply to support the growth of Iowa’s economy.