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1985 Map of San Ygnacio

Name: 1985 Topographic Map of San Ygnacio
Creator: U.S. Geological Survey
Published: 1985
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1985

About this map

The Rio Grande carves the international boundary between Texas and Mexico in this mid-1980s survey, marking the western edge of Zapata and Webb counties. The riverfront is characterized by a dense network of intermittent arroyos, such as Arroyo Dolores and Arroyo San Francisco, which drain the dry ranchlands toward the river valley. In the north, the urban reach of Laredo contrasts with the small, historic settlements of San Ygnacio and Ramireño downstream.

Energy extraction and transportation networks define the interior landscape, notably at the Jennings West Oil and Gas Field and the surrounding Gravel Pits. The era's infrastructure is visible in the paths of Texas 359 and the Mexican National Railroad, which connect the border region to the inland towns of Aguilares and Mirando City. This map documents a transitional period for these South Texas communities, balanced between traditional river-oriented settlements and the expanding industrial footprint of the oil fields.