1947 Map of Rio Grande

About this map

The coastal lowlands and river deltas of northeastern Puerto Rico are meticulously detailed in this survey from the 1940s. The inland town of Rio Grande serves as a central hub, surrounded by a network of sugar-producing agricultural settlements known as colonias. These include Colonia Miñi, Colonia Dolores, and Colonia Blasina, which signify the region's historical economic reliance on the sugar industry and labor communities. The landscape is defined by the winding paths of the Río Grande de Loíza and the Río Espíritu Santo, which empty into the Océano Atlántico. Along the shoreline, prominent landmarks like Pta Miquillo and Pta Picúa frame the Ensenada Comezón. The map also captures local infrastructure such as State Route 3 and State Route 187, connecting coastal hamlets like Poblado Honduras to the interior.