trending Market Intelligence /marketintelligence/en/news-insights/trending/allYOkbCEetNylwxwTkLhw2 content
Log in to other products

Login to Market Intelligence Platform

 /


Looking for more?

Contact Us

Request a Demo

You're one step closer to unlocking our suite of comprehensive and robust tools.

Fill out the form so we can connect you to the right person.

If your company has a current subscription with S&P Global Market Intelligence, you can register as a new user for access to the platform(s) covered by your license at Market Intelligence platform or S&P Capital IQ.

  • First Name*
  • Last Name*
  • Business Email *
  • Phone *
  • Company Name *
  • City *
  • We generated a verification code for you

  • Enter verification Code here*

* Required

Thank you for your interest in S&P Global Market Intelligence! We noticed you've identified yourself as a student. Through existing partnerships with academic institutions around the globe, it's likely you already have access to our resources. Please contact your professors, library, or administrative staff to receive your student login.

At this time we are unable to offer free trials or product demonstrations directly to students. If you discover that our solutions are not available to you, we encourage you to advocate at your university for a best-in-class learning experience that will help you long after you've completed your degree. We apologize for any inconvenience this may cause.

In This List

Alliant closes 127-year-old Iowa coal plant 6 years after switching to gas

Essential Energy Insights - September, 2020

Rate case activity slips, COVID-19 proceedings remain at the forefront in August

Bull market leaves US utilities behind in August

Utilities, midstream reckon with energy transformation on the horizon


Alliant closes 127-year-old Iowa coal plant 6 years after switching to gas

A fossil fuel-fired power plant in eastern Iowa has ceased operations after roughly 127 years of generating electricity. Alliant Energy Corp. shuttered its 70-MW gas-fired Dubuque facility in Dubuque County on May 28.

Company spokesman Mike Wagner said the plant was built as a coal-fired generator around 1890 and had an original capacity of 9.5 MW before it was acquired by Alliant in 1925. Operated by Alliant's Iowa subsidiary, Interstate Power & Light Co., the plant continued to run on coal until 2011, when stringent federal emissions regulations forced a switch to cleaner natural gas.

Since its gas conversion, the plant has been used as a 'peaker' plant in periods of high energy demand. However, Dubuque had not been used to meet peak demand since March as a result of declining energy use and energy demand, Wagner said. As the plant undergoes decommissioning and eventual demolition, Alliant will be upgrading a 161-kV substation that services the nearby town of Dubuque and was associated with the plant.

Alliant originally sought to retire the Dubuque plant by the end of 2014 but postponed the shutdown at the request of the Midcontinent ISO. At the time, the regional grid operator determined the plant could not be retired so soon without impairing the grid's reliability.