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Air Quality Control System Projects: Edgewater Generating Station

Wisconsin Power and Light Company (WPL) recently completed the installation of a Selective Catalytic Reduction (SCR) system at Edgewater Generating Station Unit 5. The SCR will further reduce nitrogen oxides (NOx) emissions from Unit 5 to comply with Wisconsin’s Reasonably Available Control Technology (RACT) requirements. Our previous projects met Phase I RACT requirements and the SCR project allows WPL to meet the Phase II RACT requirement which began May 1, 2013.

Construction on the approximately $153 million investment started in September 2010 and the SCR was operational by the end of 2012.

With the completion of the SCR, approximately 65% of NOx emissions will be removed from Unit 5 per year as a result of the Phase I and II projects.

Next Project
In May 2013, the Public Service Commission of Wisconsin (PSCW) approved WPL’s application to install a scrubber/baghouse system to reduce sulfur dioxide (SO2) emissions from Edgewater Unit 5.

Construction began in March 2014 and will be completed in 2016. Upon its completion, SO2 emissions from Unit 5 are expected to be reduced by approximately 90% per year from current levels.