Conifer East is a passive treatment system, consisting of a series of ponds, wetlands and a limestone channel at an acid mine discharge site located in Conifer, Jefferson County. The treatment system was designed to precipitate and contain iron, aluminum, and manganese solids in a manner that would allow for periodic monitoring and maintenance of the treatment system. Routine inspections and water sampling help determine if the system is functioning properly and when maintenance is necessary. Maintenance consists of reshaping the channel and replacing the limestone. The placement of fresh limestone re-establishes subsurface treatment. Subsurface treatment provides the maximum surface area of the limestone to interact with the mine discharge, which allows the system to function at its highest level.
