Annapolis Lead Mine, Annapolis, Iron County, Missouri : EPA facility id: Mo0000958611
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Annapolis Lead Mine, Annapolis, Iron County, Missouri : EPA facility id: Mo0000958611

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    Final Release

    The U.S. Environmental Protection Agency (EPA) proposed the Annapolis Lead Mine (ALM) Site for the National Priorities List (NPL) on March 8, 2004. The final rule to add the ALM site to the NPL was published in the July 22, 2004 Federal Register, with an effective date of August 23, 2004. It was listed primarily because of elevated levels of heavy metals, particularly lead, which were present throughout the site. In addition, surface water bodies located downstream from the site contained elevated concentrations of site-related hazardous substances that could pose a threat to recreational fisheries and wetlands in the area.

    The Annapolis Lead Mine (ALM) site is an inactive lead mine located in Iron County, Missouri, approximately one mile east of the town of Annapolis. Galena (lead-bearing ore) mining began at the site in the 1920s and continued sporadically until 1940.

    Mining activities that took place at the site included excavation of ore bodies, crushing and concentrating of ore, and storage of concentrated metals prior to shipment offsite for smelting. The crushing and concentrating wastes (tailings) were disposed of on the property in a ravine that is a tributary of Sutton Branch Creek. The resulting pile of waste was highly erodible, having steep sides and an outwash area that fanned westward towards Sutton Branch Creek.

    Sutton Branch joins Big Creek, which flows approximately 15 miles downstream from the ALM site into Sam A. Baker State Park near Patterson, in Wayne County, Missouri. Within the park, Big Creek joins the St. Francois River and empties into Wappapello Lake. Appendix A, Figure 1 provides a map of the area.

    In 1997, elevated levels of arsenic, cadmium, copper, lead, nickel, and zinc were present in on-site soil and groundwater. Surface wipe samples taken from various floor locations in an on-site residence (former mine building) contained lead at levels that exceeded EPA standards for interior lead. These results, along with the results from blood-lead samples taken from the children living on-site, were used in determining that the individuals were being adversely affected by living on-site. In May 997, EPA completed a Removal Action, which included the relocation of the family from their residence on the site.

    As a result of the elevated levels of contaminants detected in the samples, the Expanded Site Inspection/Removal Assessment recommended that a second removal action be completed on-site to eliminate the threat of exposure to hazardous substances that were present at the site. In September 2003, EPA proposed a time-critical removal action for the ALM. The goal of the removal action was to identify, consolidate, and stabilize the lead contaminated mine tailings on-site. The time-critical removal action plan was finalized, with work beginning at the site in February 2004. Settling basins were constructed immediately to manage storm water runoff. The tailings and contaminated soil have been formed into a mound in the middle of the ravine where the pile was originally deposited. The new pile was capped with clean soil that should allow vegetation to grow. EPA completed the time-critical removal action in late 2004.

    Prepared by: Missouri Department of Health and Senior Services Division of Environmental Health and Communicable Disease Prevention Section for Environmental Public Health under a cooperative agreement with the Agency for Toxic Substances and Disease Registry.


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