According to the article, the factory will process 3 million tons of coal each year.
During the 1920s the line carried 750,000 tons of coal a year.
Nearly 133 feet long, it carried 28 tons of coal and could run at more than 80 miles an hour.
By February 1905, just 12 tons of coal had been brought to the surface.
It produced about 3.1 million tons of coal in 1986, down slightly from 1985.
In 1905 over half a million tons of coal a year was carried.
Until the early 1990s, the mine produced around 100 tons of coal per day.
In other words, there are 74 million tons of coal per km3.
The plant uses more than 4 million tons of coal each year.
In its first year the mine produced 328 tons of coal.