1929 - 1933: Hanna No. 6: Union Pacific Coal Company's No. 6 Mine in Hanna, Wyoming
Notes from Bob Leathers
The Union Pacific Coal Company's No. 6 underground mine in Hanna was developed in 1929 and started production of coal in 1930. It operated for a little over three years and was closed in 1933. The mine produced 38,914 tons of coal with a peak of 10 workers over the life of the mine. There were no fatalities at the No. 6 mine.