CCR Rule Compliance Data and Information

On December 19, 2014, the U.S. Environmental Protection Agency (EPA) issued a final ruling for the regulation and management of coal combustion residuals (CCR or coal ash) under the Resource Conservation and Recovery Act. The rule, which was published to the federal register on April 17, 2015, establishes requirements for both existing and new CCR landfills and surface impoundments. The rules include:

  • Structural integrity requirements
  • Groundwater monitoring and corrective action
  • Location restrictions
  • Liner design criteria
  • Operating criteria
  • Record keeping, notification and internet posting

This internet site contains the information required by the CCR rule for each of Montana-Dakota Utilities’ coal-fired power plants.


Big Stone is a coal-fired generating unit located near Big Stone City, SD, and is owned by three companies. Montana-Dakota Utilities owns 22.7 percent of the plant. The plant generates about 475 megawatts. Otter Tail Power Company is the plant’s operator. Compliance data and information can be found on Otter Tail Power's website.


Coyote Station is a coal-fired generating unit located near Beulah, ND, and is owned by four companies. Montana-Dakota owns 25 percent of the plant. The plant generates about 425 megawatts. Otter Tail Power Company is the plant’s operator. Compliance data and information can be found on Otter Tail Power’s website.

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