In a utilitarian structure of reinforced concrete, a bastion of pragmatism near the Trinity River, there worked a group of government employees, cartographers not of lands, but of interventions. They are assets of the United States Army Corps of Engineers, Fort Worth District, and their charge is a solemn one: to translate USACE’s immense, earth-altering projects from the sterile domain of engineering schematics and hydrological models into the authoritative and comprehensible form of the map. Theirs is not an art of mere illustrations, but of sober visualization, a critical bridge between the raw power of engineering and the human landscapes it was designed to protect or create.