<Tr> <Th> Owner </Th> <Td> Dia Art Foundation </Td> </Tr> <P> Spiral Jetty is an earthwork sculpture constructed in April 1970 that is considered to be the central work of American sculptor Robert Smithson . Smithson documented the construction of the sculpture in a 32 - minute color film also titled Spiral Jetty . </P> <P> Built on the northeastern shore of the Great Salt Lake near Rozel Point in Utah entirely of mud, salt crystals, and basalt rocks, Spiral Jetty forms a 1,500 - foot - long (460 m), 15 - foot - wide (4.6 m) counterclockwise coil jutting from the shore of the lake . </P> <P> In 1999, the artwork was donated to Dia Art Foundation . Since its initial construction, those interested in its fate have dealt with questions of proposed changes in land use in the area surrounding the sculpture . </P>

Where was the spiral jetty created before it disappeared due to erosion