Item 2. PROPERTIES

Alliant Energy - As a holding company, Alliant Energy doesn’t directly own any significant properties other than the stock of its subsidiaries. The principal properties of those subsidiaries are as follows:

IPL and WPL

Electric - At December 31, 2018, IPL’s and WPL’s EGUs by primary fuel type were as follows:

At December 31, 2018, IPL owned approximately 17,200 miles of overhead electric distribution line and approximately 3,500 miles of underground electric distribution cable, as well as approximately 560 substation distribution transformers, substantially all of which are located in Iowa. At December 31, 2018, WPL owned approximately 16,000 miles of overhead electric distribution line and approximately 5,900 miles of underground electric distribution cable, as well as approximately 310 substation distribution transformers, substantially all of which are located in Wisconsin.

Gas - IPL’s and WPL’s gas properties consist primarily of mains and services, meters, regulating and gate stations and other related transmission and distribution equipment. At December 31, 2018, IPL’s gas distribution facilities included approximately 5,100 miles of gas mains located in Iowa and WPL’s included approximately 4,600 miles of gas mains located in Wisconsin.

Other - IPL’s and WPL’s other property consists primarily of operating and storeroom facilities, vehicles, computer hardware and software, communication equipment and other miscellaneous tools and equipment. IPL’s other property also includes steam service assets. Refer to Note 10(b) for information regarding WPL’s lease of the Sheboygan Falls Energy Facility from AEF’s Non-utility Generation business.

AEF - AEF’s principal properties included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2018 were as follows:

Non-utility Generation - Includes the Sheboygan Falls Energy Facility, a 347 MW, simple-cycle, natural gas-fired facility near Sheboygan Falls, Wisconsin that was placed in service in 2005 and is leased to WPL. The Sheboygan Falls Energy Facility was accredited with 291 MW of generating capacity for MISO’s resource adequacy process for the planning period from June 2018 through May 2019.

Transportation - Includes a short-line railway in Iowa with 116 miles of railroad track and 10 active locomotives; and a barge terminal on the Mississippi River.

Corporate Services - Corporate Services’ property included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2018 consisted primarily of a customer billing and information system for IPL and WPL and other computer software, and the corporate headquarters building located in Madison, Wisconsin.