Qualla: Iron Mountain Mine https://qualla.com/iron-mountain-mine en-us © 2026 Bendyline Mon, 20 Jul 2026 10:21:03 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/hero-small.webp Qualla: Iron Mountain Mine https://qualla.com/iron-mountain-mine Iron Mountain Mine: Introduction https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. Deep inside a fractured mountain nine miles northwest of Redding, California, water flows that defies what most people think possible: a pH of negative 3.6, making it the most acidic water naturally occurring anywhere on Earth. Iron Mountain Mine spent a century yielding iron, gold, silver, copper, and zinc before closing in 1963, but the chemistry set loose by those operations continues its work underground. The mountain bleeds acid into creeks that feed the Sacramento River, threatening endangered Chinook salmon and the drinking water of 70,000 people. Listed as a Superfund site since 1983, this scarred peak in the Klamath Mountains stands as one of America's most toxic legacies.

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-intro.mp3 0:06 1 full Iron Mountain Mine: A Century of Extraction https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. Thomas Jefferson Harrison, Robert Lyon, and Stephan Alozo Meek discovered valuable mineral deposits at Iron Mountain in 1852, during California's gold rush fever. What they found was a massive sulfide ore deposit, a geological formation packed with iron, silver, gold, copper, zin...

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-a-century-of-extraction.mp3 0:06 2 full Iron Mountain Mine: Chemistry of Destruction https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. The abandoned mine workings, waste rock dumps, and tailings piles left behind created a slow-motion environmental catastrophe. When pyrite meets moisture and oxygen, sulfuric acid forms. That acid seeps through the fractured mountain, dissolving copper, cadmium, zinc, and other h...

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-chemistry-of-destruction.mp3 0:06 3 full Iron Mountain Mine: Life in the Extreme https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. The hostile environment inside Iron Mountain has attracted attention from scientists studying life at its limits. A pink biofilm, several millimeters thick, floats on pools of hot water with a pH of 0.8. This living mat consists of bacteria like Leptospirillum and archaea like Fe...

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-life-in-the-extreme.mp3 0:06 4 full Iron Mountain Mine: Managing the Unmanageable https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. The Environmental Protection Agency designated Iron Mountain Mine a Superfund site in 1983, recognizing the scale of contamination threatening Northern California's water supply. A treatment plant went online in 1994 to intercept acid drainage before it could reach the Sacramento...

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-managing-the-unmanageable.mp3 0:06 5 full Iron Mountain Mine: Salmon and Stalactites https://qualla.com/iron-mountain-mine/ Photo credit US Geological Survey, Public domain. The stakes of managing Iron Mountain's drainage include the survival of winter-run Chinook salmon, a federally listed endangered species that spawns in the Sacramento River downstream. Fish kills linked to the mine have been documented since 1899. The drainage poses a constant th...

Read more: Iron Mountain Mine on Qualla

Image: US Geological Survey | Public domain

]]> Fri, 23 Jan 2026 00:00:00 GMT https://qualla.com/_m/9/r/0/z/iron-mountain-mine-wp/9r0z-iron-mountain-mine-salmon-and-stalactites.mp3 0:06 6 full