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Project Overview

Cliffside Steam Station located on the Rutherford/Cleveland County line in North Carolina.

On March 13, 2009, Duke Energy received a final revised air permit for the new, state-of-the-art Cliffside Unit 6 from the North Carolina Department of Environment and Natural Resources, Division of Air Quality. The permit designates that the unit is a minor source of hazardous air pollutants.

This designation confirms Cliffside Unit 6 will have among the strictest, most effective air emission controls available to protect public health and the environment. The Cliffside Steam Station is located on the Rutherford/Cleveland County line in North Carolina.

Construction began on Jan. 30, 2008, and the project began commercial operation on Dec. 30, 2012. This project ensures Duke Energy will continue to meet our customers’ need for clean, affordable and reliable electricity in the future.

Cliffside Unit 6

  • 825-megawatt advanced clean-coal unit
  • 4-year construction period (January 2008 to December 2012) 
  • $1.8 billion estimated cost for construction
  • 2,200 new construction jobs
  • $100 million annual construction payroll
  • 20-30 permanent jobs
  • $125 million in federal clean-coal tax credits to benefit customers

Cleaner Air

  • This state-of-the-art coal unit employs an innovative combination of air quality controls to remove 99 percent of sulfur dioxide, 90 percent of nitrogen oxides and 90 percent of mercury. Its high efficiency also means it burns less coal per megawatt-hour than most other coal units in the nation.
  • Duke Energy retired Cliffside units 1-4 (198 megawatts) on Oct. 1, 2011. 
  • Retirement of additional 800 megawatts of older, less efficient coal-fired generation will make Cliffside Unit 6 carbon neutral by 2018.

Environmental Benefits

  • Cooling towers on Cliffside Unit 6 require less withdrawal from Broad River and will significantly minimize thermal impacts to the river.
  • The wet scrubber will generate, as a by-product, wall board quality gypsum for the building industry.