Alliant Energy begins work on 650 MW combined-cycle power plant

Published on: 

Alliant Energy's Iowa utility recently received all of the necessary regulatory approvals and permits to issue a Full Notice to Proceed (FNTP) for construction of the Marshalltown Generating Station (MGS). The company's approximate 650 MW, combined-cycle natural gas-fueled station is underway and the MGS, located in Marshalltown, is expected to power more than 500,000 homes when commercially operable. 

In addition to issuing the FNTP, the company also announced that KBR has been selected as the project's engineering, procurement and construction contractor. Alliant Energy's Iowa utility expects the MGS to begin commercial operation in the second quarter of 2017.

John Larsen, Alliant Energy's Senior Vice President of Generation said the construction of MGS is “a key part of our company's long-term energy resource plan that further balances our energy supply while reducing emissions." Larsen said as a partner in this project, KBR will construct a facility that will provide safe, efficient and reliable energy to customers.


In August 2012, Alliant Energy's Iowa utility announced a multi-billion dollar long-term energy resources plan to meet its customers’ future energy needs while further balancing its energy supply and reducing emissions. The plan included:

·       Investments to reduce emissions and increase efficiency of IPL's existing coal-fired generating units

·       Execution of a new long-term nuclear power purchase agreement to buy 431 MW of capacity and energy from Duane Arnold Energy Center

·       Construction of MGS

·       Retirement of older and less efficient coal-fired generating stations

·       Continued commitment to renewable resources and energy efficiency