Alliant Energy closes on the sale of RMT

                   Alliant Energy closes on the sale of RMT

Renewable energy services company now owned by Infrastructure and Energy
Alternatives, LLC

PR Newswire

MADISON, Wis., Feb. 1, 2013

MADISON, Wis., Feb. 1, 2013 /PRNewswire/ --Alliant Energy Corporation (NYSE:
LNT) announced today that it has closed on the sale of RMT, Inc. (RMT), a
former renewable energy services subsidiary, to Infrastructure and Energy
Alternatives, LLC (IEA). Alliant Energy announced in December 2012 that it had
entered into a definitive agreement to sell RMT to IEA. Terms and conditions
of the sale are not being disclosed.


IEA is a leading provider of engineering, procurement and construction
services to a variety of markets including renewable energy and fossil
generation across North America. RMT will become a subsidiary of IEA working
in their renewable energy group along with existing IEA subsidiary White
Construction, Inc. RMT's headquarters will remain in Madison, Wis.

RMT is a leading engineering, procurement and construction contractor
specializing in the design and construction of wind and solar electric energy
generating facilities and high-voltage transmission lines.

Alliant Energy Corporation (NYSE: LNT), headquartered in Madison, Wis.,
provides regulated electric and natural gas service to approximately one
million electric and 414,000 natural gas customers in more than 1,300
communities across Iowa, Wisconsin and Minnesota. Alliant Energy's mission is
to deliver the reliable energy and exceptional service customers and
communities count on – safely, efficiently, and responsibly. Interstate Power
and Light Company and Wisconsin Power and Light Company are Alliant Energy's
two public utility subsidiaries. For more information, visit

SOURCE Alliant Energy Corporation

Contact: Media, Scott Reigstad, +1-608-458-3145, or Investor Relations, Susan
Gille, +1-608-458-3956
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