The project series documents "Tumbleweeds Catcher", an installation by Pettena and a group of his students from the University of Utah, in Salt Lake City, in 1972. The installation consisted of a tower-scaffold built on a vacant lot near the city centre and covered with mesh so it could capture the tumbleweeds blown by the wind. Through this installation Pettena's intention was to "highlight the 'work of the land', the tumbleweeds moved by the wind and intercepted by the mesh of the tower, 'naturalize' it, contaminate it, thereby embodying the revenge of nature over urbanized space."  A second edition was later presented at the Utah Museum of Contemporary Art in Salt Lake City in 2013.
The project series contains photographs of the installation in 1972 and 2013, and drawings and sketches of the tower.
 Marco Scotini, editor. Non-conscious architecture: Gianni Pettena, Sternberg Press, 2018, 235 pages. p. 162.
This project, along with "Clay House" and "Red Line" are part of a series of three projects entitled "The Salt Lake Trilogy". The projects were undertaken between April 1971 and March 1972 while Pettena was teaching as a guest professor at the University of Utah, in Salt Lake City. For material related to these projects, see also: AP207.S1.1972.PR02 Clay House (1972) and AP207.S1.1972.PR04 Red Line (1972).