From The Farmington Daily Times (Hannah Grover):
The additional discharge from the Silver Wing Mine into the Animas River did not have a negative impact on water quality, according to the New Mexico Environment Department.
The Silver Wing Mine discharged a larger amount of water than usual last week, causing some discoloration in the Animas River near Silverton, Colorado.
However, the discoloration was not visible downstream, and NMED does not see any evidence of negative impacts to water quality…
NMED has been monitoring water quality data for both turbidity and pH in the Animas River in Colorado and New Mexico. According to the slides, the Silver Wing Mine has not, to date, caused potentially harmful changes in turbidity or pH in the Animas River as it flows from Colorado into New Mexico at Cedar Hill.