Wisconsin Power and Light Co. told the Public Service Commission of Wisconsin in a July 24 update that the selective catalytic reduction installation to control NOx emissions from its coal-fired Edgewater Unit 5 is about 64% complete.
The commission had in May 2010 approved unit co-owners Wisconsin Power and Light and Wisconsin Electric Power Co. for this project. The estimated cost of the approved project was $153.944m. As of the July 24 update, the utility noted, the project is forecasted to be completed within the estimated cost. As of this update, engineering progress is 98% complete and construction progress is 64% complete. The forecasted in-service date for the SCR is December 2012.
Engineering milestones recently included: receiving quality assurance observation documents and equipment supplier shop inspection reports for inclusion in quality assurance turnover books; and incorporating final comments in operation and maintenance manuals for turnover to plant staff at project completion. On the procurement front, among other things, the company has received induced draft fan motors and rotors and also received initial loads of catalyst for the SCR. On the construction front, workers have finished SCR structural steel erection and finished installation of all SCR reactor and cap sections.
Incidentally, in March 2011, WPL purchased Wisconsin Electric Power’s 25% ownership interest (about 95 MW of generating capacity) in Edgewater Unit 5 for $38m. WPL is a unit of Alliant Energy (NYSE: LNT). WPL has also said its environmental compliance plan includes an SO2 scrubber and baghouse at Edgewater Unit 5 to reduce SO2 and mercury emissions. WPL is targeting the scrubber and baghouse to be in service in 2017.