Energy policy — nuclear: Colorado and Cotter, Corp don’t agree on cleanup at the Schwartzwalder Mine in the Ralston Creek watershed

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From The Denver Post (Bruce Finley):

Cotter has filed a lawsuit challenging the state order…

State mining regulators “continue to coordinate closely with CDPHE in reviewing and monitoring on-site activities, as well as ensuring environmental protections are in place to protect drinking water supplies,” Pineda said. “Cotter has submitted a proposal to install a bypass that would divert ground and surface water around the mine, and the company is continuing to provide DRMS with information needed to fully review this proposal.”

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Meanwhile, Cotter has received permission to use an impoundment pond that the state of Colorado claims leaks, according to a report from Bruce Finley writing for The Denver Post. Here’s an excerpt:

The tailings impoundment at Cotter is about 157 acres and includes two retention areas. One is closed and contains about 2 million cubic yards of material. The second area is open and receiving materials related to the mill demolition, including the 90,000 gallons of sludge. It contains about 2 million cubic yards of material and is about half full, according to the health department. Cotter’s vice president for milling operations, John Hamrick, said the sludge is about 95 percent kerosene, used to process uranium. Before the sludge is moved to the impoundment, it will be mixed with another material. “It’s like kitty litter,” Hamrick said Monday. “It becomes a solid.”

Eventually, new sludge and solvents dumped into the leaky impoundment will be neutralized, health department spokeswoman Jeannine Natterman said. “More contamination is not going into that (Cañon City) area.” Hamrick said Cotter disputes the health department’s assessment of the impoundment. “We disagree with the state, that the impoundments are leaking,” he said…

Toxic plumes have been detected moving underground toward Cañon City and the Arkansas River. Most recently, officials disclosed that the cancer-causing chemical trichloroethylene has been detected in groundwater at concentrations up to 360 times federal health limits.
“It has been confirmed that no trichlroethylene has gotten into Lincoln Park (neighborhood in Cañon City),” Natterman said. Cotter officials “are still poking holes, taking samples” to characterize that plume, she said. “Cotter is responsible for all the sampling and analysis. All data have to be quality-controlled by us.”

More Schwartzwalder mine coverage here. More nuclear coverage here and here.

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