I grew up in Mahanoy City, PA in the heart of the hard coal region of Pennsylvania. I was driving through today and saw this "holiday" image.

The Old St. Nicholas Breaker, located just outside of Mahanoy City, was constructed in 1930 and began operating in 1932
It was once the largest coal breakers in the world. Twenty miles of railroad track were laid, 3,800 tons of steel and more than 10,000 cubic yards of concrete were used.
When the breaker was constructed it was divided into two sides. Each side could be operated independently, producing 12,500 tons of coal a day.
Once the raw coal enters the production process within the breaker it took just 12 minutes to pass through the entire breaker.

For 31 years, the Old St. Nicholas Breaker prepared all sizes of Famous READING ANTHRACITE for the markets of the world.

More information at http://www.readinganthracite.com/history_old.html