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1914 Map of Union Island
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1914 Map of Union Island

USGS Topo · Published 1914

About this map

Union Island and the surrounding San Joaquin Delta are defined here by a complex hydraulic landscape of natural waterways and early 20th-century irrigation engineering. This 1914 survey illustrates the intricate network of the Old River and Middle River as they weave through low-lying tracts, supplemented by man-made channels like the Grant Line Canal and the Fabian and Bell Canal. These waterways were critical for transforming the delta into productive agricultural land, a process overseen by state engineers like W. F. McClure.

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Map Details

Date Portrayed1914
Date Published1914
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:31,680
Physical Dimensions16.4 x 19.8 inches

Editions of this 1914 Union Island Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain