The two parties have agreed on the geology and now believe they can pump enough water to lower the levels of water in the main shaft 150 feet below the Ralston Creek alluvium. The same approach being used at California Gulch; the perpetual pumping and treating of groundwater. Proof that the energy costs for uranium extraction sometimes never end. Here’s a report from Bruce Finley writing for The Denver Post. Here’s an excerpt:
The latest test data show that highly toxic water in the Schwartzwalder mine’s main shaft seeps underground into Ralston Creek, which flows to Ralston Reservoir.
A settlement deal requires Cotter to pump and treat millions of gallons of water and lower the level to 150 feet below the top of that 2,000-foot-deep shaft. This is intended to prevent uranium — in concentrations up to 1,000 times the health standard — from contaminating water supplies.
Cotter also must provide $3.5 million in financial assurance money to ensure cleanup of the mine west of Denver is done and pay a civil penalty of $55,000. Another $39,000 in penalties is to be waived.
The deal, approved by state regulators, ends Cotter’s lawsuits challenging state orders to clean up the mine and the creek. A state judge ruled in favor of regulators and Cotter appealed the decision.