The town was familiar with deep rock mining and eager for more secure Government jobs.

However, as easy-to-reach surface deposits played out, miners increasingly turned to hard rock mining.

One of the most important aspects of underground hard rock mining is ventilation.

What is going on with all the rock mining and crushing and sorting?

Hard rock mining continued for decades more in the mountains.

As with other types of hard rock mining there are several methods of extraction.

For hard rock mining, other methods are usually used.

By the time hard rock mining was done, the five mines had producing a total of over $20 million in gold.

Hard rock mining continued at the Gold Mountain Mine until 1919.

George Neuerburg was an expert in hard rock mining.