It was made a Superfund site by the US Environmental Protection Agency in 1983, plaintiffs filed a lawsuit, the mill closed in 1990 and in 2001 HMC merged with Barrick Gold. In 2019 because the Trump Organization despises Native Americans uranium mining was fast-tracked in and around Indian Country where tribes already suffer from diseases and birth defects wrought by radioactive contamination.
The leftover slurry was piped into two unlined earthen pits, the largest the size of 50 football fields and filled with over 21 million tons of uranium mill tailings. Over time, the uranium tailings decayed into radon gas; meanwhile, radioactive contaminants seeped into four of the region’s aquifers. Residents compiled a list of neighbors who died of cancer — they called it the Death Map. In fact, the conditions necessary for contaminants to infiltrate a fifth aquifer in a single generation — not a thousand years — could already be in the making. The future of the site seems all but predetermined: a wasteland in the truest sense, and a national sacrifice zone. Adding to the uncertainty is a recent announcement that the Trump administration intends to cut personnel at the EPA by up to 65 percent. “We’ve been poisoned to the gills,” says Christine Lowery, the Cibola county commissioner. [Poisoning the well]Nearly a century of residue from Homestake and the Black Hills Mining District affects millions of cubic yards of riparian habitat all the way to the Gulf of Mexico. Although the Oahe Dam was completed in 1962 sequestering most of the silt the soils of the Belle Fourche and Cheyenne Rivers are inculcated with arsenic at levels that have killed cattle. Endangered pallid sturgeon, paddlefish, catfish and most other organisms cope with lethal levels of mercury throughout the South Dakota portion of the Missouri River.
Tailings from uranium mining have been detected in Angostura Reservoir in the southern Black Hills and in northwestern South Dakota cleanup in the Cave Hills area went for decades without remediation.
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