According to the Florida Industrial and Phosphate Research Institute, draglines, the current mining tool, came into use in the 1930s and significantly changed the mining operation. In 1900, it took a year to mine a 15-acre mine site with picks and shovels. Today one dragline mines 15 acres in a month.

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Tags: environment
Photo by: Mosaic Fertilizer LLC |  VIRIN: 130501-A-CE999-051.JPG