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1969 Map of San Ysidro

Name: 1969 Topographic Map of San Ysidro
Creator: U.S. Geological Survey
Published: 1972
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1972

About this map

San Ysidro sits at the convergence of the Jemez River and the Rio Salado, serving as a central point in a landscape defined by ancestral lands and colonial land grants. This 1969 survey documents the intricate boundaries of the Jemez Indian Reservation, Zia Indian Reservation, and the Espiritu Santo Grant. The terrain is characterized by high plateaus and deep arroyos, including the prominent White Mesa and Mesa Redonda.

Evidence of historical transit and utility infrastructure is visible throughout the quadrangle, notably the Old Railroad Grade following the Salado valley and a major Pipeline corridor. Agricultural history is preserved through the naming of irrigation features like the Mexican Ditch and West Side Lateral. The map also records numerous archaeological sites, marked simply as Ruin or Ruins, alongside natural landmarks such as Blue Water Spring and Salt Spring.