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1956 Map of Toulon

Name: 1956 Topographic Map of Toulon
Creator: U.S. Geological Survey
Published: 1965
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1965

About this map

The Humboldt Lake basin and the Toulon Lake bed define the hydrology of this arid corridor, where the Southern Pacific railroad follows the edge of the Trinity Mountains. Industrial activity is concentrated around the settlement of Toulon, which features several millponds and tailings piles, signaling the processing of ore from regional operations like the Coon Can Mines to the southwest. The presence of Derby Field and an Airway Beacon near the Humboldt River marks the importance of this valley for mid-century transportation and aviation navigation.

Agricultural development is clustered in the Upper Valley, where irrigation infrastructure including the Johnson Drain and Graveyard Drain supports the Big Meadow Ranch and Arobio Ranch. Movement through this landscape remains tied to historical routes, evidenced by the Old California Trail Road tracing the valley floor and the Old Toll Road cutting through the northern mountain passes. Remnants of earlier prospecting are scattered throughout the peaks, from Toulon Peak to the various unnamed prospects along the Seven Troughs range.