From The Associated Press (Susan Montoya Bryan) via The Colorado Sun:
Under the settlement with the Navajo Nation, Sunnyside Gold Corp. — a subsidiary of Canada’s Kinross Gold — will pay the tribe $10 million
The Navajo Nation’s Department of Justice announced Wednesday it has settled with mining companies to resolve claims stemming from a 2015 spill that resulted in rivers in three western states being fouled with a bright-yellow plume of arsenic, lead and other heavy metals.
Under the settlement with the Navajo Nation, Sunnyside Gold Corp. — a subsidiary of Canada’s Kinross Gold — will pay the tribe $10 million…
The tribe said the toxic water coursed through 200 miles (322 kilometers) of river on Navajo lands…
The tribe’s claims against the EPA and its contractors remain pending. About 300 individual tribal members also have claims pending as part of a separate lawsuit…
The state of New Mexico also confirmed Wednesday that it has reached a settlement with the mining companies. Under that agreement, $10 million will be paid to New Mexico for environmental response costs and lost tax revenue and $1 million will go to Office of the Natural Resources Trustee for injuries to New Mexico’s natural resources…
The settlement was not an admission of liability or wrongdoing, but Sunnyside agreed to it “as a matter of practicality to eliminate the costs and resources needed to continue to defend against ongoing litigation,” Myers said in an email…
In August, the U.S. government settled a lawsuit brought by the state of Utah for a fraction of what that state was initially seeking in damages.
In that case, the EPA agreed to fund $3 million in Utah clean water projects and spend $220 million of its own money to clean up abandoned mine sites in Colorado and Utah.
After the spill, the EPA designated the Gold King and 47 other mining sites in the area a Superfund cleanup district. The agency still reviewing options for a broader cleanup.
From the Land Desk newsletter (Jonathan Thompson):
Whether the company [Kinross] is at all culpable for the spill is a question the courts have yet to answer. But there is definitely a connection, both hydrological and historical.
Here’s the short(ish) bulleted explanation:
The Gold King Mine workings are on one side of Bonita Peak (in the Cement Creek drainage) and the Sunnyside Mine workings are on the other side of Bonita Peak (in the Eureka Creek drainage). If you look at the two mines in a cross-section of the peak, they sit side-by-side, separated by a lot of rock. In the early 1900s the owners of the Gold King started drilling the American Tunnel straight into Bonita Peak below the Gold King. The plan was then to link up with the Gold King in order to provide easier access. More than one mile of tunnel was dug, but the link was never completed, prior to the Gold King’s shutdown in the 1920s. Photographic and other evidence suggests that prior to the construction of the American Tunnel, water drained from the Gold King Mine. However, after the tunnel’s construction the mine was said to be dry, suggesting that the tunnel hijacked the hydrology of the Gold King. In 1959 Standard Metals continued drilling the American Tunnel through the mountain in order to provide a better access (from the Cement Creek side) to the then-defunct Sunnyside Mine. After the Sunnyside shut down, the parent company at the time (Echo Bay), reached an agreement with the state to plug the American Tunnel with huge bulkheads to stop or slow acid mine drainage. They placed three bulkheads, one at the edge of the workings of the Sunnyside Mine (1996), one just inside the opening of the American Tunnel (2003), and another in between (2001). Shortly after the bulkheads were placed, the Gold King ceased being a “dry” mine, and drainage resumed, eventually flowing at more than 250 gallons per minute. After the ceiling of the adit collapsed, water began backing up behind it until it was finally released in one catastrophic swoop in August 2015.
It seems pretty clear that one or more of the bulkheads caused water to back up inside the mountain and enter the Gold King Mine workings, eventually leading to the blowout. At this point, however, no one knows which bulkhead is the culprit, so no one knows whether the water is coming from the Sunnyside mine pool, or whether it is actually coming from the part of the American Tunnel that is still on Gold King property. Until that is determined, the root cause of the Gold King blowout will remain a mystery.
For the longer explanation of the Gold King saga, read my book, River of Lost Souls: The Science, Politics, and Greed Behind the Gold King Mine Disaster. And for more maps showing the relationship between the Sunnyside and the Gold King, check out my River of Lost Souls reading guide.