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1955 Map of Tortuga, 1985 Print
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1955 Map of Tortuga

USGS Topo · Published 1985

About this map

The Chocolate Mountains dominate this arid landscape where the Imperial Valley desert meets military and water infrastructure. Based on 1950s fieldwork, the map documents the Coachella Canal as it skirts the East Mesa, a critical lifeline for Colorado River water distribution. The small settlement of Tortuga and the adjacent Southern Pacific Road parallel the canal, serving as a corridor through the expansive Sand Hills. To the east, the terrain rises into the Aerial Gunnery Range, marked by a hard Naval Reservation Boundary and specialized routes like the Salvation Pass Trail. Numerous dry wells, such as Barth Well and Hayden Well, reflect the challenges of the environment, while the presence of an Old Railroad Grade and a Gravel Pit suggest a history of resource extraction and transit development in this remote corner of Imperial County.

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Map Details

Date Portrayed1955
Date Published1985
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.9 inches

Editions of this 1955 Tortuga Map

Historical Maps of Imperial County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain