 A major tragedy marred the end of the 19th century, when a streetcar accident resulted in significant loss of life on July 4, 1900.From May to August 1907, the city was the site of a smelter workers' strike organized by Local 545 of the Industrial Workers of the World (IWW), with the goal of a fifty-cent per day pay raise.The strike was strongly opposed by the local business community, and the smelter owners threatened to blacklist organizers and union officials.