EPA moves to protect world's largest salmon fishery from Alaska mine

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WASHINGTON, DC, Feb. 28, 2014 -- Under the Clean Water Act (CWA), the Environmental Protection Agency (EPA) is initiating a process to identify appropriate options to protect the world's largest sockeye salmon fishery in Bristol Bay, Alaska, from the potentially destructive impacts of the proposed Pebble Mine.

The Pebble Mine has the potential to be one of the largest open-pit copper mines ever developed and could threaten a salmon resource rare in its quality and productivity. During this process, the U.S. Army Corps of Engineers cannot approve a permit for the mine. This action, requested by EPA Administrator Gina McCarthy, reflects the unique nature of the Bristol Bay watershed as one of the world's last prolific wild salmon resources and the threat posed by the Pebble deposit, a mine unprecedented in scope and scale.

EPA is basing its action on available information, including data collected as a part of the Agency's Bristol Bay ecological risk assessment and mine plans submitted to the Securities and Exchange Commission. Today, Dennis McLerran, EPA Regional Administrator for EPA Region 10, sent letters to the U.S. Army Corps of Engineers, the State of Alaska, and the Pebble Partnership initiating action under EPA's Clean Water Act Section 404(c) authorities.

"Bristol Bay is an extraordinary natural resource, home to some of the most abundant salmon producing rivers in the world. The area provides millions of dollars in jobs and food resources for Alaska Native Villages and commercial fishermen," McLerran said. "The science EPA reviewed paints a clear picture: Large-scale copper mining of the Pebble deposit would likely result in significant and irreversible harm to the salmon and the people and industries that rely on them."

Based on information provided by The Pebble Partnership and Northern Dynasty Minerals, mining the Pebble deposit may involve excavation of a pit up to one mile deep and over 2.5 miles wide -- the largest open pit ever constructed in North America. Disposal of mining waste may require construction of three or more massive earthen tailings dams as high as 650 feet. The Pebble deposit is located at the headwaters of Nushagak and Kvichak rivers, which produce about half of the sockeye salmon in Bristol Bay.

The CWA generally requires a permit under Section 404 from the U.S. Army Corps of Engineers before any person places dredge or fill material into wetlands, lakes and streams. Mining operations typically involve such activities and must obtain CWA Section 404 permits. Section 404 directs EPA to develop the environmental criteria the Army Corps uses to make permit decisions. It also authorizes EPA to prohibit or restrict fill activities if EPA determines such actions would have unacceptable adverse effects on fishery areas.

See also: "EPA Regional Focus: Spotlight on the Pacific Northwest"

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