In 2007, the Chicago Architectural Club directed an exhibition to explore strategies for the reappropriation of an underutilized freight train line on the north side of Chicago known as the Bloomingdale Line. The goal of the exhibition was to generate awareness of the future value of the freight line as a public amenity and to draw attention to the design process that would enable this to happen. This book includes a catalog and review of twenty-six design proposals for the Bloomingdale Line as well as essays from invited contributors that discuss the role of architecture in the design and execution of infrastructural work and explore the interface between architecture, landscape, engineering, and ecological practice in the design of postindustrial landscapes.