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LOS Emissions Control

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Leland Olds Station

Leland Olds Station near Stanton, ND,
is being fitted with a wet limestone scrubber.

The Leland Olds Station is the first power plant constructed by Basin Electric. Unit 1 began operating in 1966; Unit 2 in 1975. The new addition - a $410 million investment in sulfur dioxide scrubbers for each of the plant’s two units - is almost complete. The scrubber for Unit 1 was originally scheduled to be tied-in spring 2011, but may be delayed until 2012.

Project planning began in 2006 for a new scrubber to remove sulfur dioxide (SO2) emissions from the plant’s flue gas . The Basin Electric board of directors approved the use of wet limestone scrubber technology for both units in January 2007. The last piece of structural steel that supports the ductwork for flue gas as it moves into the scrubber was set July 14, 2009.

The Environmental Protection Agency’s Regional Haze Rule, which provides for improvements in visibility at our national parks and wilderness areas, requires greater emission control through the installation of best available retrofit technology (BART). The Leland Olds Station has always been in full compliance with all its federal and state environmental permits. By adding the scrubbers, Leland Olds will be in a better position to operate for an additional 20 to 30 years providing jobs and economic benefits to the area long into the future.

Limestone for the scrubbers is supplied by Montana Limestone Company’s facilities near Warren, MT. Montana Limestone is a subsidiary of Dakota Coal Company, a subsidiary of Basin Electric.

Project facts

Construction begins

Summer 2007

Projected completion

Unit 1 - 2011
Unit 2 - 2012

Project manager

Les Larson

Construction supervisor

Perry Kress

Technology selection

Wet limestone scrubber 

Projected capital cost

$410 million

Estimated peak construction workforce

300 to 400

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