In the Shasta Mountain, California area, cleanup of the abandoned Altoona Mine progresses. The area’s newspaper has published an update and photograph of the work, which involves the installation of a triple bottom and cap system: clay, high-density polyethylene (HDPE) geomembrane, and geotextile. Altoona Mine was once a gold mining site, and its cinnabar vein (inorganic, mercury sulfide) led to mercury production through 1968. Now that we have geosynthetic environmental controls, its hoped that future mining sites are protected during operations rather than only in retroactive legacy corrections.

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