Christo filled the Gasometer Oberhausen from March 16 until December 30, 2013 with the installation Big Air Package. After The Wall (1999) as the final installation of the Emscher Park International Building Exhibition, Big Air Package was his second work of art in the Gasometer. The "Big Air Package – Project for Gasometer Oberhausen, Germany" was conceived by Christo in 2010 (for the first time without his wife Jeanne-Claude). The sculpture was set up in the interior of the industrial monument and was made of 20,350 m (719,000 cu ft) of translucent fabric and 4,500 m (14,800 ft) of rope. In the inflated state, the envelope, with a weight of 5.3 tonnes (5.8 short tons), reached a height of more than 90 m (300 ft), a diameter of 50 m (160 ft) and a volume of 177,000 m (6,300,000 cu ft). The monumental work of art was, temporarily, the largest self-supporting sculpture in the world. In the accessible interior of Big Air Package, the artist generated a unique experience of space, proportions, and light.
Christo and Jeanne-Claude spent more than $6 million on environmental studies, design engineering, and wind tunnel testing of fabrics. As with past projects, Over The River would be financed entirely by Christo and Jeanne-Claude, through the sale of Christo's preparatory drawings, collages, scale models, and early works of the 1950s/1960s. On July 16, 2010, the U.S. Bureau of Land Management released its four-volume Draft Environmental Impact Statement, which reported many potentially serious types of adverse impact but also many proposed "mitigation" options.