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1974 Map of Black Star Canyon, 1977 Print
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1974 Map of Black Star Canyon

USGS Topo · Published 1977

About this map

The Santa Ana Mountains dominate this 1974 orthophotoquad, showing the intricate network of ridges and canyons before significant modern development reached this part of the range. This aerial perspective, captured by the Geological Survey in cooperation with the Orange County Board of Supervisors, reveals the raw geography of the Santiago Reservoir and the winding course of the Santa Ana River along the northern edge. The orthophoto format provides a unique visual record of the land surface, illustrating the contrast between the steep, brush-covered slopes and the relatively undeveloped alluvial flats of the day. It captures a moment in the mid-1970s when much of this rugged landscape remained in its natural state, providing an essential reference for understanding the historical topography of the canyon country before urban expansion altered the surrounding valleys.

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Map Details

Date Portrayed1974
Date Published1977
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions22 x 26.8 inches

Editions of this 1974 Black Star Canyon 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