In a beautiful scratch-free plexibox. Hand signed lower right. In 1996, Christo and Jeanne-Claude selected the Arkansas River in Colorado for their ambitious project "Over The River". Although the project was ultimately never realized, it remains one of their most talked about designs. The Concept The plan was to stretch shiny, silver-colored sheets of woven polypropylene over the water over a stretch of 5.9 miles (almost 10 kilometers).