Dave Johnston Power Plant

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Snapshot

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 .

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
22 / 24
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One or more exeedances
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Well "halo" size corresponds to mean concentration. Please note that some wells may not be visible on the map due to overlapping locations.
Pollutants monitored and above guidelines
Tip: Click on a contaminant to view wells that have recorded exceedances. Click again to remove the filter. arsenic boron cadmium cobalt fluoride lead lithium molybdenum radium selenium sulfate thallium
Pollutants monitored and below guidelines
antimony barium beryllium chromium mercury
Pollutants not monitored
ammonia, copper, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, manganese, nickel, nitrate, nitrite, silver, strontium, tritium, uranium

Facility last updated on Friday, July 19, 2019 01:21:39 PM EDT