EPA keeps Obama's restrictions on big Alaskan mine proposal

An employee of Northen Dynasty Mines Inc. mans a drilling rig in the Pebble Mine East site near the village of Iliamna, Alaska. Photo: Luis Sinco / Getty Images

EPA is maintaining (at least for now) Obama-era protections that have thwarted development of a large gold and copper mine in Alaska's Bristol Bay watershed.

Why it matters: The proposed Pebble Mine has been controversial for years amid concerns that it would damage the ecologically sensitive region that's home to the world's largest sockeye salmon run.