1918: Hanna No. 5: The Union Pacific Coal Company's No. 5 Mine at Hanna, Wyoming
Exhibit by Bob Leathers
The Hanna No. 5 underground mine was opened in 1918, but the coal was poor quality resulting in no coal production. The No. 5 mine was closed within a year and never reopened. There were no miners killed in the No. 5 mine.