On the shore of Falcón International Reservoir, the new town of Nueva Ciudad Guerrero was built in 1950-54 to replace Guerrero’s 18th-century townsite, inundated by impoundment of river water in the reservoir. Nueva Ciudad Guerrero represented the PRI’s mid-century vision of Mexico’s future. It is a car-oriented, suburbanized city. Architect and historian Carlos Rugerio Cázares believes that the Mexico City architect Carlos Lazo, secretary of Comunicaciones y Obras Públicas during the Ruíz Cortines administration, was involved in Guerrero’s planning.