Ahead of a planned application for a certificate of public convenience and necessity, Wisconsin Public Service Corp. on Nov. 24 filed with the Public Service Commission of Wisconsin the engineering plan for a 400-MW (nominal) addition to its Fox Energy Center.
The new facility will be Unit 3 at the Fox plant. The engineering plan was written by consultant Burns & McDonnell Engineering and is also being submitted to the Wisconsin Department of Natural Resources as part of the project’s permitting process at that agency. The company asked for a DNR response to the plan by Dec. 19, so it can submit formal permit applications with that agency by Dec. 29. After the DNR responds to the plan, the utility also plans to file the certificate application with the PSC.
Site work on this project is planned to begin in 2016, with the project due to be in-service in December 2018.
The study noted that the other two finalist sites for this new capacity were the existing Pulliam power plant and the greenfield Ridge Road site in Portage County. The Fox Energy Center site was picked due to factors like already-available natural gas supply and the chance to share infrastructure and personnel with the existing combined-cycle facilities at Fox. The existing Units 1 and 2 at Fox have a total of 593 MW of capacity in a two-on-one configuration.
This new unit would be a one-on-one combined-cycle facility with one F-Class combustion turbine generator, one heat recovery steam generator and one steam turbine generator. It would be fueled with mainly natural gas from the 30-inch in diameter ANR pipeline to the plant site, with ultra-low-sulfur fuel oil as a backup. Fuel oil is already used at the plant, so no additional facilities are needed to store this fuel for the new unit.
Wisconsin Public Service said in December 2013 that it had chosen the Fox Energy Center near Wrightstown, Wisc., as the preferred site for an approximately 500-MW natural gas-fired combined cycle unit.