Leadville Mine Tour of a Bygone Era
Leadville Mine Tour of a Bygone Era

According to Wikipedia, cumulative production in the Leadville mining district through 1963 was 240 million troy ounces (16 million pounds; 7.5 million kilograms) of silver, three million troy ounces (210 thousand pounds; 93 thousand kilograms) of gold, 987 million tons (2.2 trillion pounds; 987 billion kilograms) of lead, 712 million tons (1.6 trillion pounds; 712 billion kilograms) of zinc, and 48 million tons (110 billion pounds; 48 billion kilograms) of copper.
