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1948 Map of Llano Seco

Name: 1948 Topographic Map of Llano Seco
Creator: U.S. Geological Survey
Published: 1977
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1977

About this map

Rancho Llano Seco sits at the heart of this landscape, reflecting the enduring influence of the Mexican land grant system on the Central Valley's geography. The Sacramento River forms the western boundary, characterized by complex hydrology including Hartley Island and numerous oxbow features like The Lagoon and Perkins Lake. These remnants of former river channels are interspersed with sloughs and lakes, such as Angel Slough and Eddy Lake, illustrating the natural flood patterns of the region before modern extensive water management.

Evidence of early river commerce and transit remains through Parrott Landing and Hites Landing, which once served as vital points for agricultural transport. Irrigation infrastructure is visible through the Western Canal and Odell Canal, signaling the shift toward the intensive farming that defines the Aguas Frias Grant area. The presence of Grain Elevators and a Gravel Pit further mark the local industrial and agricultural economy of the late 1940s.