#AnimasRiver: Which was worse for water quality: #GoldKingMine spill or #416Fire floods? — The Durango Herald

From The Durango Herald (Jonathan Romeo):

Study compared metal loading in both events; results surprised researchers

A new report shows that runoff from the 416 Fire burn scar this summer dumped higher concentrations of potentially toxic metals into the Animas River than the Gold King Mine spill three years ago…

It has been a rough couple of years for the Animas River.

In August 2015, the Environmental Protection Agency accidentally caused the Gold King Mine, near Silverton, to blow out, sending 3 million gallons of toxic waste down the Animas River, turning it orange.

Then, this July, heavy rain fell over the 416 Fire burn scar in the Hermosa Creek drainage, just north of Durango, and sent a torrent of black mud, rocks and other debris down the Animas River.

After both events, Mountain Studies Institute, an environmental research and education nonprofit, extensively monitored and researched the impacts on aquatic life and water quality in the Animas River.

Though only a few months removed from the July floods, the preliminary data show the impacts of the Gold King Mine spill pale in comparison to the mudslides and debris flows from the 416 Fire burn scar.

Peter Butler with the Animas River Stakeholders Group said that point was made clear when the 416 Fire runoff caused nearly all the fish in the Animas River to die.

By comparison, there has never been any evidence that the tainted Gold King Mine water caused any die-off of aquatic life.

Roberts’ study backs this with data.

The study took samples at the height of the 416 Fire debris flows on July 17 and July 24 on the Animas River, near Rotary Park, and compared it to samples taken during the mine spill as it passed through the same spot Aug. 6 to Aug. 9, 2015.

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