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1955 Map of Poston

Name: 1955 Topographic Map of Poston
Creator: U.S. Geological Survey
Published: 1971
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1971

About this map

The Colorado River serves as the dominant boundary on this mid-century survey, defining the border between California and Arizona and the split between Riverside and Yuma counties. The landscape is characterized by the organized infrastructure of the Indian Reservation, where a geometric grid of roads and canals supports local settlements. The town of Poston and the secondary site of Poston 2 are the primary hubs, with social and logistical life anchored at the Poston School.

Evidence of local industry and water management is seen in the presence of Oil Tanks, multiple Sewage Disposal facilities, and a protective Levee system along the river's eastern bank. To the southeast, the terrain shifts abruptly from the irrigated valley floor toward the high Mesa, where a Jeep Trail provides access to more remote areas. This map documents a transitional era of agrarian and civic development within the Colorado River Valley just before the 1970s revisions.