Seminole Electric may need as much as 1,400 MW of new capacity by 2024

Seminole Electric Cooperative’s forecasts of capacity and demand for the projected summer and winter peaks include the addition of approximately 1,400 MW of capacity by 2024, with that capacity needed to replace expiring purchased power contracts and to serve increased member load requirements while maintaining Seminole’s reliability criteria.

Seminole said in an April 1 annual Ten Year Site Plan filed with the Florida Public Service Commission that this capacity expansion plan includes the need for three 224-MW combustion turbine units and one 741-MW combined cycle plant, none of which are currently sited. The three combustion turbine units are scheduled to enter service in December 2022, December 2023, and December 2024. In addition, by May 2021, Seminole also has a need for 741 MW of combined cycle capacity.

A final decision as to whether Seminole will construct and own these additional facilities will be based upon future economic studies, the cooperative added. The inclusion of these units in Seminole’s capacity expansion plan does not represent at this time a commitment for construction by Seminole.

The ten-year plan named three potential sites for new capacity:

  • Gilchrist Site – Seminole has purchased land in Gilchrist County as a potential site but has not made a final determination if or when the site will be used for any of Seminole’s future resource requirements. The Gilchrist site is approximately 530 acres in size. It is located in the central portion of Gilchrist County, approximately eight miles north of the City of Trenton and may be suitable for installation of generation or transmission resources. Much of the site has been used for silviculture (pine plantation) and consists of large tracts of planted longleaf and slash pine communities.
  • Seminole Generating Station (SGS) – The existing SGS plant is located in a rural unincorporated area of Putnam County approximately five miles north of the City of Palatka. The site is 1,978 acres in size, bordered by U.S. 17 on the west, and is primarily undeveloped land on the other sides. The site was certified in 1979 for its two existing coal-fired electric generating units, SGS Units 1 and 2.
  • Midulla Generating Station (MGS) – MGS is located in Hardee and Polk counties about nine miles northwest of Wauchula. The site is bordered by County Road 663 on the east, CF Industries on the south, and Mosaic Inc. on the north and west. Payne Creek flows along the site’s south and southwestern borders. The site was originally strip-mined for phosphate and was reclaimed as pine flatwoods, improved pasture, and a cooling reservoir with a marsh littoral zone.

As of the end of 2014, Seminole had total summer capacity resources of approximately 4,000 MW consisting of owned, installed net capacity of 2,060 MW and the remaining capacity in firm purchased power. Seminole’s existing generating facilities include:

  • Seminole Generating Station (SGS) Units 1 and 2 comprise a 1,472 MW nameplate coal-fired plant located in Putnam County;
  • Midulla Generating Station (MGS) Units 1–3 comprise a 587-MW nameplate gas-fired combined cycle plant located in Hardee County; and
  • MGS Units 4–8 comprise a 312-MW nameplate peaking plant.
About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.