Big Fork Ranch has 7 groundwater monitoring wells, 6 of which have been polluted above federal advisory levels based on samples collected between February 28, 2016 and December 18, 2019. Groundwater at this site contains unsafe levels of sulfate, boron, cobalt, lead, molybdenum, lithium, arsenic, radium and antimony.
Site descriptionEvan and Associates Construction's Big Fork Ranch is a working and recreational ranch established in 1974 in Ponca City, Oklahoma. The facility has the capacity to store 20,000 tons of fly ash during the winter months. Its surface impoundments, CCR Cell Nos. 3 & 8 are regulated by the CCR rule. You can find the industry-reported data here. For more information on the Big Fork Ranch, see EIP’s 2019 National Coal Ash Report .