Dave Johnston Power Plant has 24 groundwater monitoring wells, 22 of which have been polluted above federal advisory levels based on samples collected between September 25, 2015 and August 10, 2017. Groundwater at this site contains unsafe levels of sulfate, molybdenum, cobalt, boron, arsenic, lead, radium, fluoride, selenium, thallium, cadmium and lithium.Site description
PacifiCorp's Dave Johnston Power Plant opened in 1959 and is located on the banks of the North Platte River in Glenrock, Wyoming. It has three coal-fired generating units that are capable of producing 817 megawatts (MW) of electricity. The plant has two CCR units: Expansion Landfill and Ash Pond. The Expansion Landfill consists of three stages, each with a planned design life of 5 years. The total area of the landfill is approximately 122.6 acres. There is one retention basin that collects runoff from all three phases. The Ash Pond is divided to two individual ponds, 4A Pond and 4B Pond. Each pond has an approximate surface area of 19.5 acres and an approximate storage capacity of 144.6 acre-feet. You can find the industry-reported data here. For more information on the Dave Johnston Power Plant, see EIP’s 2019 National Coal Ash Report .