Wyoming's first new coal mine in 50 years is said to be operating soon but it won't rely on the fossil fuel to make money.

The expansion permits Signal Peak Energy to extract nearly 60 million tons of coal from the Bull Mountains mine north of Billings.

At the bottom of Resolution Copper mine’s shaft No. 10, pumps push water to a treatment plant on the surface. Water at the bottom is 175 degrees.

The high price of the metal is giving Australian miners a boost. Yet one top copper asset remains undervalued, according to investors and analysts.