From The Durango Herald (Mark Esper):
Sunnyside Gold Corp. last October offered to contribute up to $6.5 million to address water-quality issues in Cement Creek and the Animas River, including up to $5 million to operate “a cost-effective” treatment plant to process tainted water spewing from the mine portals above Silverton. But that $5 million for operations would keep the plant running only for about five years, according to the report by MWH Global, of Boise, Idaho.
However, Larry Perino, reclamation manager for Sunnyside Gold Corp., said the report “does not suggest that other less-expensive methodologies may not be feasible.” Perino said the purpose of the MWH Global report was not to suggest the ultimate determination of what may be the best alternative. “Rather, it is the goal of the report to set forth feasible alternatives against which other methodologies or alternatives may be measured.”[...]
The MWH Global report looked at five alternatives, with construction costs estimated at between $4.5 million and $6.5 million, and operating costs pegged at between $876,000 and $1.4 million.
MWH Global said that two of the alternatives stood out as “superior to the others” on a “nonfinancial screening criteria.” But it said one of those two alternatives has lower operating costs and thus “is financially superior.” The project is seen as a possible solution to heavy metals loading in Cement Creek from acidic mine drainage.
The problem is considered so serious that the Environmental Protection Agency found the site eligible for Superfund listing last year. But lacking community support, the EPA backed off its proposed listing in April and agreed to proceed with a collaborative process with the Animas River Stakeholders Group.
The four mine portals that are the focus of attention are the Mogul, Red & Bonita, Gold King No. 7 and the American Tunnel.
More water pollution coverage here.