It's called American Flats.

"An historic mill that has become a magnet for graffiti artists, paintballers and area teen-age partiers, will be demolished rather than saved.

"The Bureau of Land Management, Carson City District said in a press release last week that the United Comstock Merger Mill decided to demolish
the 91-year-old mill due to physical safety hazards at the property.

"The hazards identified falling concrete, underground mill sumps filled with water, and holes in the concrete flooring. The press release stated that a 2008 audit
of the site by the Department of Interior, Office of the Inspector General,found the mill site to be a high risk-liability to the federal government.

"The mill was built in 1922 to process local gold and silver ore utilizing cyanide vat leaching in what was then described as the largest concrete mill in the United States,
processing about $7.5 million in gold and silver. Since abandonment in 1924, due to plummeting silver prices, the site has been used
as a place to hold parties, post graffiti, and conduct paintball wars."

From: http://virginiacitynews.com/death-to-mill-site-mill-at-american-flat-to-be-demolished-p5219-1.htm

I did a day's shooting here, and will be showing additional images in the days ahead. It is a fascinating place.