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1955 Map of Big Maria Mts SE

Name: 1955 Topographic Map of Big Maria Mts SE
Creator: U.S. Geological Survey
Published: 1956
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1956

About this map

The Colorado River serves as the primary boundary between Riverside County, California and Yuma County, Arizona in this mid-century topographic record. While much of the landscape is dominated by the steep rises of the Big Maria Mountains, human activity is concentrated along the riverbank and within the Parker Indian Reservation. Notable cultural features include the Giant Indian Intaglios, a set of massive earth figures located near the river's edge.

Early recreational and agricultural development is evident through sites like River Bend Lodge, Haakers Camp, and the Blythe Boat Club. The map also captures the alluvial character of the Colorado River Valley, including Horse Island and Hall Island, before modern river management significantly altered the flow patterns. A few scattered industrial sites, such as a Quarry near Black Point and a Gravel Pit near the river, indicate localized resource extraction.