1943 Map of Calexico

About this map

The border city of Calexico serves as the focal point of this wartime survey, situated directly on the international boundary between the United States and Mexico. The landscape is defined by the massive hydraulic engineering of the Imperial Valley, where the All American Canal and the Alamo River support a dense network of irrigation features such as the Highline Canal and Holtville Main Drain. This intricate system of canals—including the Alamitos Canal, Ash Canal, and Hemlock Canal—illustrates the intensive agricultural development that transformed the desert into productive farmland by the 1940s.