Bristol Bay is home to the largest sockeye salmon fishery in the world, according to pamphlets from the organization Save Bristol Bay. The Kvichak and Nushagak rivers, connecting to the bay, are two of the largest remaining sockeye runs in the world. The sustainable harvest from these runs reportedly provide over half of the sockeye salmon available in the global market. Bristol Bay's fishery supports over 14,000 jobs, the pamphlet says, and drives a $1.5 billion economy.

However, some Alaskan conservation groups fear that Bristol Bay is in danger from the proposed Pebble Mine, which would...