White salt deposits have since covered the dark basalt rocks. However, Smithson later wanted to make certain alterations and recalled the construction crew for an additional 3 days. Work on the sculpture began in April 1970, and lasted a period of 6 days. Smithson hired Bob Phillips, an experienced contractor in Utah, to haul 6,650 tons of hard rock into the lake using a large tractor and two trucks. The jetty is made out of basalt rocks, salt crystals, and mud, and stretches over 1,500 feet into the lake. The water's red hue is caused by the presence of algae and bacteria that are tolerant to the high salinity of the water. Smithson selected the northeastern shore of the Great Salt Lake, near Rozel Point, as the location for his sculpture due to the reddish color of the water.
Spiral Jetty becomes visible whenever the lake's water level is below 4,197 ft. As a result of receding water levels since then, the prominence of Spiral Jetty has risen, increasing both the visitorship to the site and the public’s interest in the artwork. Smithson created the sculpture during a period of drought, but soon after its completion the water level rose and submerged it for three decades until it re-emerged again during a drought in 2002 and has stayed visible since then. Built in April 1970 by American sculptor Robert Smithson, the earthwork sculpture, which is also referred to as earth art or environmental art, is a counterclockwise coil constructed of mud, salt crystals and basalt rocks that is 1,500 ft long and 15 ft wide. Spiral Jetty is an earthwork sculpture on the northeastern shores of the Great Salt Lake, Utah, United States.
Spiral Jetty, Utah Spiral Jetty is a giant earthwork sculpture by Robert Smithson in the Great Salt Lake of northern Utah, United States.
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