PROPERTY, PLANT AND EQUIPMENT

Utility -

Natural Gas-Fired Generation Projects -

IPL’s Marshalltown Generating Station - IPL’s construction of Marshalltown, an approximate 660 MW natural gas-fired combined-cycle EGU, was completed and the EGU was placed into service in April 2017. As of June 30, 2017, Alliant Energy and IPL recorded total project costs of $640 million and AFUDC of $81 million for Marshalltown in “Property, plant and equipment, net” on their balance sheets.

WPL’s West Riverside Energy Center - WPL is currently constructing West Riverside, an approximate 730 MW natural gas-fired combined-cycle EGU. Construction began in 2016 and is currently expected to be completed by early 2020. As of June 30, 2017, Alliant Energy and WPL recorded capitalized expenditures for construction work in progress of $185 million and AFUDC of $5 million for West Riverside in “Property, plant and equipment, net” on their balance sheets. These capital expenditures do not yet reflect any potential impacts from the intent to exercise purchase options by certain WPL electric cooperatives for a partial ownership interest in West Riverside.

Wind Generation -

Franklin County Wind Farm Transfer - In April 2017, the Franklin County wind farm was transferred from AEF to IPL as approved by a February 2017 FERC order. IPL’s purchase price, including certain transaction-related costs, was $32 million. As of the closing date, the estimated fair values of the assets purchased and liabilities assumed by IPL were as follows (in millions):



Electric plant in service		$40
Current assets	2
Total assets acquired	42
Other liabilities	10
Net assets acquired		$32

The final amount to be recovered for IPL’s electric rate-making purposes will be determined by the IUB as part of IPL’s Iowa retail electric base rate review for the 2016 Test Year, which was filed in April 2017.

Retirement of IPL’s Sutherland Units 1 and 3 - In June 2017, IPL retired Sutherland Units 1 and 3 and reclassified the remaining net book value of these EGUs from property, plant and equipment to a regulatory asset on Alliant Energy’s and IPL’s balance sheets. Refer to Note 2 for further discussion.

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

Utility -

Natural Gas-Fired Generation Projects -

IPL’s Marshalltown Generating Station - IPL’s construction of Marshalltown, an approximate 660 MW natural gas-fired combined-cycle EGU, was completed and the EGU was placed into service in April 2017. As of June 30, 2017, Alliant Energy and IPL recorded total project costs of $640 million and AFUDC of $81 million for Marshalltown in “Property, plant and equipment, net” on their balance sheets.

WPL’s West Riverside Energy Center - WPL is currently constructing West Riverside, an approximate 730 MW natural gas-fired combined-cycle EGU. Construction began in 2016 and is currently expected to be completed by early 2020. As of June 30, 2017, Alliant Energy and WPL recorded capitalized expenditures for construction work in progress of $185 million and AFUDC of $5 million for West Riverside in “Property, plant and equipment, net” on their balance sheets. These capital expenditures do not yet reflect any potential impacts from the intent to exercise purchase options by certain WPL electric cooperatives for a partial ownership interest in West Riverside.