Skip to main content

Sign up for our newsletter.

Quality journalism. Progressive values. Direct to your inbox.

Federal officials are investigating the 2015 spill that sent millions of gallons of toxic waste into a Colorado waterway and memorably turned it orange. (Photo: Mor/flickr/cc)

Federal Officials Investigating Massive EPA Spill That Turned River Orange

In April, the Department of the Interior found that the spill was preventable

Nadia Prupis

Federal officials are launching a criminal investigation into the 2015 Gold King Mine spill that sent millions of gallons of toxic waste into a Colorado waterway and memorably turned portions of the state's 126-mile Animas River orange.

The Environmental Protection Agency (EPA), which caused the spill, made the announcement Monday as it sent letters to members of U.S. Congress to update them about the agency's own analysis of the spill, according to the Denver Post.

EPA's Office of the Inspector General (OIG) said the probe, launched by the U.S. Attorney's Office, part of the Department of Justice, was "based on requests from several members of the House and Senate."

The Post writes that in its report to Congress, the EPA found that

as of July 15 it has dedicated $29 million to respond to the release and for continued water quality monitoring. Officials say they are also evaluation more incident-related expenses and that they are working to expedite the distribution of those funds.

[....] A year after the Gold King spill, the EPA says it is working on more permanent solutions to tackling mining drainage broadly and in the areas around the Gold King. The mine and 47 other surrounding sites are part of a proposed Superfund listing in San Juan County.

However, the National Wildlife Federation said "no meaningful effort has been made" since the disaster to address the complex dangers posed by abandoned mines throughout the country, the Post continues.

The spill occurred on August 5, 2015, after EPA workers cleaning up heavy metal waste at the abandoned Colorado mine accidentally unleashed the toxic materials into the Cement Creek, which feeds the Animas River. The plume spread swiftly, eventually contaminating rivers in Colorado, New Mexico, and Arizona, where communities were forced to declare states of emergency and the Navajo Nation vowed to take action against the EPA.

The contaminants seeping into the river—at a rate of 548 gallons per minute—included arsenic, copper, zinc, lead, aluminum, and cadmium. In April, the Department of the Interior found that the spill was preventable.


Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.

We've had enough. The 1% own and operate the corporate media. They are doing everything they can to defend the status quo, squash dissent and protect the wealthy and the powerful. The Common Dreams media model is different. We cover the news that matters to the 99%. Our mission? To inform. To inspire. To ignite change for the common good. How? Nonprofit. Independent. Reader-supported. Free to read. Free to republish. Free to share. With no advertising. No paywalls. No selling of your data. Thousands of small donations fund our newsroom and allow us to continue publishing. Can you chip in? We can't do it without you. Thank you.

Senate Dems Propose Talking Filibuster for Voting Rights

"If Senate Democrats can find the political courage this moment requires, they have the tools right now to pass voting rights legislation and save our democracy."

Jessica Corbett ·


94% of AZ Progressives Support Primary Challenge if Sinema Kills Voting Rights

"Sinema can betray Arizonans, but there aren't enough pharma lobbyists in the world to keep her in office if she does."

Brett Wilkins ·


Dems Urged to Hold Senate Floor for 'As Long As It Takes'

"Call your senators now and tell them to hold the floor, keep the debate going, and fix or ditch the filibuster to pass democracy reform," says Indivisible.

Jessica Corbett ·


Exxon Net-Zero Plan Called Greenwashing From 'Climate Liar'

"Exxon and Big Oil's whole strategy is to pretend that fossil fuels can be part of the solution so that they can delay the adoption of renewables another year and keep profiting from oil and gas."

Julia Conley ·


Rising US Renewables Expected to Spur Decline in Fracked Gas

"Renewable energy is starting to do to natural gas what natural gas did to coal."

Kenny Stancil ·

Support our work.

We are independent, non-profit, advertising-free and 100% reader supported.

Subscribe to our newsletter.

Quality journalism. Progressive values.
Direct to your inbox.

Subscribe to our Newsletter.


Common Dreams, Inc. Founded 1997. Registered 501(c3) Non-Profit | Privacy Policy
Common Dreams Logo