sentences:  The railroad track, the old Prescott & Eastern line which long before had been taken over by the Santa Fe, was removed in 1971.Today in Humboldt, a lone smelter smokestack, a significant reminder of the region's mining history and pioneers' legacy, remains overlooking the historic buildings on Main Street.Farming continued in a small portion of the area until 2006 when the last working farm was sold to developers.