Old Colorado mine leaks 4,500 gallons of orange water

Melanie Bergolc
FILE - In this Aug. 10, 2015, file photo, Silverton, Colo., resident Melanie Bergolc walks along the banks of Cement Creek in Silverton, polluted by mine waste runoff. The focus on a toxic mine spill that fouled rivers in three states shifts to Congress the week of Sept. 7 as lawmakers kick off a series of hearings into how the U.S. Environmental Protection Agency accidentally unleashed the deluge of poisoned water. (Jon Austria/The Daily Times via AP, File) MANDATORY CREDIT

ELDORA, Colo. (AP) — Officials say a leak from an old Colorado mine sent 4,500 gallons of orange water into a creek.

They don’t believe the spill in Eldora, which was spotted Monday, is toxic, but the Environmental Protection Agency says it’s still waiting for results of tests for heavy metals.

EPA spokeswoman Lisa McClain-Vanderpool tells the Boulder Daily Camera newspaper that tests done Monday showed the pH balance of the water, which heavy metals would affect, appeared to be within normal ranges.

The spill, blamed on a leaky plug at the Swathmore Mine, temporarily shut down water-intake systems for Nederland, a foothills town close to the mine, and the downstream city of Boulder.

It comes a month after 3 million gallons of contaminated wastewater spilled from another Colorado mine, fouling rivers in three states.

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