1918 - 1918: Hanna No. 5: The Union Pacific Coal Company's No. 5 Mine at Hanna, Wyoming
Notes from Bob Leathers
The Union Pacific Coal Company's Hanna No. 5 underground mine was developed in 1918, but the quality of the coal turned out to be poor. The No. 5 mine closed within a year and never reopened. There were no miners killed in the No. 5 mine.