This copper mine does open pit mining and currently runs on an around-the-clock schedule.

And there was open pit mining, which depended on blasting away entire cliffs of virgin rock.

From 1955 to 1962, open pit mining began on the site.

Almost all the gold in Nevada comes from large open pit mining and cyanide heap leaching recovery.

The district has rich lignite (brown coal) deposits, which is used in open pit mining.

The Burbanks deposit historically produced over 400,000 ounces of gold from both underground and open pit mining.

They recommended open pit mining, using steam shovels to load railroad cars, a novel idea at the time.

Deep pit mining would be necessary, and we will need metals when the freighter's cargo is used up.

The open pit mining and tailings re-treatment are the largest of the four operations.

After a period of open pit mining, lasting for three to five years, the second stage will also include an underground operation.