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1956 Map of Durmid SE

Name: 1956 Topographic Map of Durmid SE
Creator: U.S. Geological Survey
Published: 1992
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1992

About this map

Salton Sea waters dominate this mid-century topographic survey, recording the unique hydrological and military character of Imperial County. The map documents an expansive Test Base spanning the southern waters, part of a complex boundary shared with the Salton Sea National (Naval Reservation) Wildlife Refuge. These designations highlight the area's dual role as a sensitive ecological sanctuary and a controlled military zone.

Along the northeastern shoreline, the settlement of Bertram sits adjacent to the State Recreation Area, marking a point of human activity near the water's edge. A notable hydrological note from May 1976 indicates an elevation of 230 feet below sea level, emphasizing the extreme terminal lake environment of the basin. The infrastructure is sparse, defined primarily by the presence of Route 111 and the surrounding township and range lines.