Antelope Valley Station has 7 groundwater monitoring wells, 5 of which have been polluted above federal advisory levels based on samples collected between July 13, 2016 and October 16, 2019. Groundwater at this site contains unsafe levels of molybdenum, sulfate, arsenic, lithium, antimony, cobalt, cadmium and lead.Site description
Basin Electric Power Cooperative’s Antelope Valley Station opened in 1984 and is located eight miles northwest of Beulah, North Dakota in Mercer County. The Antelope Valley Station consists of two coal-fired units that generate approximately 900-MW. The station disposes of fly ash, bottom ash, and FGD waste at a landfill located northeast of the facility. The landfill is regulated under the CCR rule. Antelope Valley Station also has a Spray Dryer Ash Make-Up Water Pond and a Decant Pond on-site, but neither are regulated under the CCR rule because of their usage for plant process water storage and management. Antelope Valley Station is among the U.S. Environmental Protection Agency's list of potential damage cases, indicating that coal ash disposal at the site has potentially polluted groundwater or surface water at levels which threaten human health and the environment.