Source: 1893 Annual Report of the Inspector of Mines of the State of Montana, usually Library Call Number TN24.M9 A3

from page 35, 1893Arp21, Evan Pugh, Silver Bow county, Silver Bow Shaft No. 2, occupation miner, fire caught in 500 foot station while the pumpman was on surface. The discovery of the origin of the fire was never made. Five men were taken out the second day and four bodies rescued on the night day.

pages 40 through 43 have a detailed accident report about this mining disaster.

In 1998 (Reprinted 2001), the Mine Safety and Health Administration published a three volume index, Historical Summary of Mine Disasters in the United States:

Volume III - Metal and Nonmetal Mines - 1885 - 1998, 71 pages
http://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/IC7493.... “Excluding Coal Mines”
from page 11

Silver Bow No.2 Mine, Butte & Boston Mining Co., Butte, MT, April 21, 1893, 9 killed

As a result of a fire in the mine, nine men lost their lives. The fire was extinguished early on the morning of April 22, after 800 gallons of water a minute had been poured into the mine, which filled with water to the 600 foot level. The bodies of the victims were found on the 400 foot level, showing that the men had climbed to that level from the place where the fire originated and were suffocated by the smoke.

From Jerry,
http://miningaccidents.weebly.com/ “Mining Accidents United States, Canada, Australia & New Zealand”