Stage of Clean-up: Study Underway
Conditions at Proposal (February 7, 1992): The Big River Mine Tailings/St. Joe Minerals Corp. site in Desloge, St. Francois County, Missouri, was used for disposal of LEAD mine tailings during 1929-58. The site is in a former mining region about 70 miles south of St. Louis often referred to as the "Old LEAD Belt." The region (approximately 110 square miles) contains numerous tailings ponds and piles. St. Joe Minerals Corp. operated the site, disposing LEAD-, CADMIUM-, and zinc-rich mine tailings over approximately 600 acres in a rural area bordered on three sides by Big River. In 1972, the company donated 502 acres of the land to St. Francois County, which then leased the land to St. Francois County Environmental Corp. (SFCEC). Since 1973, SFCEC has operated a sanitary landfill on approximately 60 acres of the southern section of the tailings pile. EPA learned of the site in 1977, when an estimated 50,000 cubic yards of tailings slumped into the Big River during a heavy rain. More...
Sources of Contamination: