Duke Energy Indiana seeks approval of new round of coal projects

Duke Energy Indiana applied Nov. 7 at the Indiana Utility Regulatory Commission for approval of a Phase 3 environmental compliance plan that includes new air projects for coal-fired capacity.

The commission on April 3 approved Duke Energy Indiana’s Phase 2 plan. The utility, a unit of Duke Energy (NYSE: DUK), offered this bare-bones description of its Phase 3 plan:

  • Refurbishment of the electrostatic precipitators at Gibson Units 3, 4, and 5 in order to ensure future compliance with the Mercury and Air Toxics Standards (MATS) filterable particulate matter limits;
  • Installation of calcium bromide systems at Gibson Units 1-5 and Cayuga Units 1-2 for purposes of mercury trim control;
  • Installation of particulate matter continuous emission monitoring systems at Gibson Units 1-5 and Cayuga Units 1-2 to demonstrate compliance with MATS limits;
  • Installation of mercury sorbent traps at the Edwardsport plant and ongoing maintenance of other company-owned and operated sorbent traps in order to demonstrate compliance with MATS limits;
  • Improvements to the stacks at Gibson Units 4 and 5 to ensure safe and reliable access for certain stack testing and monitoring in order to demonstrate compliance with MATS;
  • Installation of relief duct dampers on Gibson Unit 5 flue gas desulfurization equipment to help ensure compliance with acid gas limits under MATS;
  • Operating and maintenance expenses associated with quarterly stack testing and Organics Work Practice Standards testing required by MATS.

The approved Phase 2 compliance plan was a much bigger one than the Phase 3 plan, since it included both coal unit retrofits and retirements. The Phase 2 plan covered:

  • Cayuga Unit 1 – Selective catalytic reduction (SCR), dry sorbent injection (DSI), ACI, arsenic mitigation system, mercury re-emission chemical injection system, in-service by December 2014;
  • Cayuga Unit 2 – SCR, DSI, ACI, arsenic mitigation system, mercury re-emission chemical injection system, in-service by June 2015;
  • Gibson Station Unit 1 – mercury re-emission chemical injection system, in-service by November 2014;
  • Gibson Station Unit 2 – mercury re-emission chemical injection system, in-service by December 2014;
  • Gibson Unit 3 – mercury re-emission chemical injection system, in-service by December 2014;
  • Gibson Unit 5 – ACI, mercury re-emission chemical injection system, in-service by May 2015;
  • Wabash River Units 2, 3, 4 and 5 – retirement by April 2015.

The Duke Energy Indiana coal plants are:

  • Gibson, 3,132 MW;
  • Cayuga (coal/oil), 1,005 MW;
  • Wabash River (coal/oil), 676 MW;
  • Gallagher, 280 MW; and
  • Edwardsport IGCC618 MW.
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.