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1940 Map of Pacheco Pass
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1940 Map of Pacheco Pass

USGS Topo · Published 1940

About this map

The San Luis Gonzaga land grant area defines this 1940 tactical map, where the Diablo Range transitions into the Central Valley. Centered on the crucial crossing at Pacheco Pass, the map details a landscape of cattle ranches and early industrial infrastructure. Major utilities like the Pacific Gas and Electric Co 154 KV and San Joaquin Light and Power Corp 110 KV lines traverse the foothills, marking the expansion of the California power grid.

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Map Details

Date Portrayed1940
Date Published1940
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions17.2 x 21.8 inches

Editions of this 1940 Pacheco Pass Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain