They ran a mining operation that continued to keep the family going.

That, he said, has forced many mining operations out of the country.

There is also a third company that has a small share in the mining operation.

After 1868 he helped in the development of Japan's mining operations.

These days with the current mining operation, the population has grown from 200 to nearly 500.

He was in the middle of a giant mining operation.

Several small mining operations were being done near the town site since that time.

At one time the mining operations there were among the largest in the world.

Despite all of these measures, there was never enough water available for the mining operation to reach its full potential.

The last formal mining operations here came in the 1940's.