This surface mine seems to be a free-for-all, started by someone who got lucky.

Additionally, the surface mines were safer than the mines deep underground.

This series of images shows the growth of surface mines around the Athabasca River from 1984 to the present.

Eight of the project's 23 wind turbines sit atop a rehabilitated surface mine.

When laying surface mines the speed range is from 6 to 20 km/h.

A representative example of the period are Puzzlewood's surface mines.

The spiral linear mine is an upper surface mine.

Below the gorges is a large surface mine producing cement.

But nearly 80 percent of the island's interior consists of abandoned surface mines and is uninhabitable.

By this time, mining was in a slump due to the playing out of surface mines.