Afterlives of an American Waterscape: The Urban Ditch in the Long Twentieth Century

Abstract This article describes the nineteenth-century landscape of surface water distribution in cities of the U.S. West, focusing on its persistence after the advent of modern water mains, based on studies of San Antonio, Texas; Los Angeles, California; Salt Lake City, Utah; and Phoenix, Arizona. These systems of ditches, acequias , zanjas , and canals began as the primary urban water supply, then later comprised a secondary system complementing the mains. Ditch networks shrank in the twentieth century, but this ostensibly obsolete waterscape survived for decades and in many places to the present. Ditches persisted because they continued to serve the purposes of their users, because sanitary reforms abated their former pollution, and because new categories of utility emerged in amenity, heritage, and ecosystem services. The study takes the perspective of users as well as providers and finds, in contrast to conventional stories of hydraulic modernity, a continuing example of “water plurality.”