Valmont Station has 11 groundwater monitoring wells, 10 of which have been polluted above federal advisory levels based on samples collected between December 08, 2015 and September 14, 2017. Groundwater at this site contains unsafe levels of sulfate, lithium, boron, cobalt, molybdenum, arsenic, selenium, antimony and lead.Site description
Valmont Station is a 192 MW facility owned and operated by Xcel Energy. The station is located in Boulder, Colorado. Xcel Energy reported the station stopped burning coal on March 3, 2017 and was gas-fired until it was fully retired on September 30, 2017. Valmont Station's two bottom ash impoundments, 3A and 3B, will be closed in 2018. The waste from this closure will be moved to the landfill, which will then be closed. The landfill is unlined and occupies approximately 60 acres of land. The impoundments are each approximately 680 feet long by 65 feet wide and 20 feet deep.
For more information on Valmont Station, see EIP's report, America's Top Fifty Power Plant Mercury Polluters.