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1948 Map of Llano Seco

Name: 1948 Topographic Map of Llano Seco
Creator: U.S. Geological Survey
Published: 1971
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1971

About this map

Sacramento River floodplains and sprawling land grants define this portion of the Sacramento Valley, where the intricate hydrology of sloughs and lakes reveals a landscape managed for agriculture and flood control. The map captures the interface between historical land grants like Rancho De Farwell and Larkins Children Rancho, and the industrial water infrastructure of the Western Canal and Odell Canal. Riverside activity is evidenced by river landings such as Parrott Landing and Hites Landing, which historically served as vital shipping points for local produce.

Inland, the dominance of large-scale ranching is anchored by the Rancho Llano Seco headquarters. The 1969 photorevisions highlight the expansion of irrigation and the placement of Grain Elevators along the Mt Diablo Meridian, reflecting the mid-century intensification of the regional grain and cattle economy. Natural features like Perkins Lake and Hartley Island sit alongside man-made improvements including an extensive Levee system and a Siphon, illustrating the continuous modification of the Butte and Glenn county line terrain.