This is the fourth in a five-part series, “Fed up in Alaska,” exploring local issues that voters will take to the polls this November.

DILLINGHAM, Alaska — The company that aims to open a gold and copper mine, dubbed the Pebble Mine, in the Bristol Bay area in southwestern Alaska has high hopes for what the project would bring to the state and America as a whole.

“Right now, it’s an idea. An idea that could help power our nation’s green energy initiatives,” the Pebble Partnership states on its website.

Quite a few Alaskans, however, think it’s a bad idea — including the six Native Alaskan tribes that live downstream from the proposed mine. In 2010 the tribes went to the Environmental Protection Agency (EPA) to ask it to use a section of the Clean Water Act to stop the mine from being built.

The battle over the Pebble Mine is raging before the developers have even applied for a license, and now it is one Alaskan voters will take to the polls in November. If approved, Ballot Measure No. 4 will allow the state legislature to prohibit mining in Bristol Bay if it determines that mining would harm wild salmon in the fishery reserve.

Proponents say there could be $500 billion worth of minerals in the ground, arguing that it is possible to protect the environment while tapping into the ground for jobs and prosperity. Those on the other side of the debate worry runoff from the mine would cause permanent damage to Bristol Bay, home to one of the richest and most productive salmon fisheries in the world, and destroy an industry that thousands of Alaskans depend on for their livelihood.

The debate offers a snapshot of the dual character of Alaska and Alaskans. When he was governor, Jay Hammond famously spoke of Alaska as a rich supplier of energy and resources and as the country’s national park, its pristine landscapes and ecosystems in need of preservation.

The ballot measure is just the latest turn in a long saga of lawsuits, complaints and other initiatives for and against the mine.

Exploration on the state-owned strip of land has taken place since the late 1980s. The debate over the mine began in earnest, however, when the new owner of mining rights, Northern Dynasty Minerals, discovered a rich concentration of minerals in an area called Pebble East in 2005.

Supporters of the ballot measure, who have organized as the group Bristol Bay Forever, argue that the proposed mine would endanger 10,000 jobs and the spawning grounds for a third of the world’s supply of sockeye salmon.

If built, the mine would cover an area as large as Manhattan and as deep as the Grand Canyon, according to the Environmental Protection Agency’s website.