Miners were generally paid according to tonnage of coal produced, while so-called "dead work", such as shoring up unstable roofs, was often unpaid.[13] According to historian Thomas G. Andrews, the tonnage system drove many poor and ambitious colliers to gamble with their lives by neglecting precautions and taking on risk, with consequences that were often fatal.[14] Between 1884 and 1912, mining accidents claimed the lives of more than 1,700 in Colorado.[15] In 1913 alone, "104 men would die in Colorado's mines, and 6 in the mine workings on the surface, in accidents that widowed 51 and left 108 children fatherless."[16]
Colliers had little opportunity to air their grievances. Many colliers resided in company towns, in which all land, real estate, and amenities were owned by the mine operator, and which were expressly designed to inculcate loyalty and squelch dissent.[17] Welfare capitalists believed that anger and unrest among the workers could be placated by raising colliers' standard of living, while subsuming it under company management. Company towns indeed brought tangible improvements to the lives of many colliers and their families, including larger houses, better medical care, and broader access to education.[18] But, ownership of the towns provided companies considerable control over all aspects of workers' lives, and they did not always use this power to augment public welfare. Historian Philip S. Foner has described company towns as "feudal domain, with the company acting as lord and master. ... The 'law' consisted of the company rules. Curfews were imposed. Company guards - brutal thugs armed with machine guns and rifles loaded with soft-point bullets - would not admit any 'suspicious' stranger into the camp and would not permit any miner to leave." Miners who came into conflict with the company were liable to find themselves and their families summarily evicted from their homes.[19]
Frustrated by working conditions which they believed were unsafe and unjust, colliers increasingly turned to unionism. Nationwide, organized mines boasted 40 percent fewer fatalities than nonunion mines.[20] Colorado miners had repeatedly attempted to unionize since the state's first strike in 1883. The Western Federation of Miners organized primarily hard rock miners in the gold and silver camps during the 1890s.
Beginning in 1900, the United Mine Workers of America began organizing coal miners in the western states, including southern Colorado. The union decided to focus on the Colorado Fuel & Iron Company because of its harsh management tactics under the conservative and distant Rockefellers and other investors. To break or prevent strikes, the coal companies hired strike breakers, mainly from Mexico and southern and eastern Europe. The Colorado Fuel & Iron Company's management mixed immigrants of different nationalities in the mines, a practice which discouraged communication that might lead to organization.