Boulder Canyon (Colorado River)
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From 1879 to 1887, the Southwestern Mining Company mined large quantities of salt in the mountains along the Virgin River. The company leased steamboats from the Colorado Steam Navigation Company to ship the salt to the mill at Eldorado Canyon. In April 1883, Captain John Alexander Mellon took a small boat upriver to Devil's Gate Canyon to install six ring bolts; each of which are eight inches in diameter, four feet long, and made of 1.75-inch-diameter iron. These ring bolts were used to secure lines from the steamboats as they navigated the dangerous rapids of Devil's Gate Canyon during high water runs to the mouth of the Virgin River at Rioville, Nevada.
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PortMaritime facility where ships may dock to load and discharge passengers and cargoLumberWood that has been processed into beams and planksReservoirStorage space for waterLeveeRidge or wall to hold back waterCementHydraulic binder used in the composition of mortar and concreteBitumenForm of petroleum primarily used in road construction

