WPPI Energy on June 6 told the Wisconsin Public Service Commission that new air controls, including an SO2 scrubber system, are over 11% complete at the coal-fired Boswell Energy Center Unit 4 and due for completion by the end of 2015.
The Wisconsin commission approved the project in February 2013.
Under the Minnesota Mercury Emission Reduction Act (MERA), plant co-owner Minnesota Power (MP) is required to file a mercury emission reduction plan with the Minnesota Pollution Control Agency (MPCA) and Minnesota Public Utilities Commission (MPUC). In November 2013, the MPUC issued an order approving the plan.
The Minnesota Center for Environmental Advocacy (MCEA) filed a petition for reconsideration of the MPUC order. On Jan. 17, the MPUC denied that petition. On Feb. 14, MCEA petitioned the Minnesota Court of Appeals to review the MPUC decision approving MP’s emission reduction plan. Briefing is in progress and the court is expected to hear oral arguments in late summer or early fall 2014, WPPI Energy told the Wisconsin commission.
In the meantime, Alstom was selected to supply its NID dry flue gas desulphurization system and Mercure activated carbon injection system for the Boswell Unit 4 project. Construction of the project commenced in July 2013. The foundations for the NID electrical building and waste ash silos were completed in November 2013. Erection of the NID electrical building is in progress.
The project will bring the 585-MW Boswell Unit 4 into compliance with state and federal regulations. WPPI Energy owns 20% of Boswell 4 and will pay a share of the upgrade cost.