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.