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1940 Map of Iris Pass, 1956 Print
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1940 Map of Iris Pass

USGS Topo · Published 1956

About this map

The Chocolate Mountain Aerial Gunnery Range dominates this landscape, establishing a significant military presence across the desert terrain of the Chocolate Mountains. Published for civil use during the mid-1950s but based on 1940 aerial photography, the map illustrates a pivotal era for water management in the California desert. The Coachella Canal and East Highline Canal represent major infrastructure projects intended to transform arid stretches into arable land. Historic routes like the Ehrenberg Road and Approximate Augustine Road cut through the passes of the Chuckwalla Mts, tracing paths used by early travelers. Natural water sources like Salvation Spring appear near Salvation Pass, serving as critical landmarks in an otherwise unforgiving environment marked by peaks such as Lion Head Mtn and the drainage of Arroyo Seco.

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Map Details

Date Portrayed1940
Date Published1956
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions17.2 x 20.9 inches

Editions of this 1940 Iris Pass Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain