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1958 Map of Logan Ridge

Name: 1958 Topographic Map of Logan Ridge
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

Logan Ridge dominates the central landscape of this 1958 survey, marking the topographical boundary between the higher elevations of the Coast Ranges and the agricultural sprawl of the Sacramento Valley. The mapping reveals a complex network of seasonal drainages, including North Fork Logan Creek, Hunters Creek, and Slough Creek, which cut through the undulating hills. To the south, Grapevine Valley provides a sheltered corridor between the ridges, where Antelope Creek and Grapevine Creek converge.

In the eastern flatlands, the influence of large-scale water management is evident along the Glenn and Colusa County line. The presence of a Canal and Levee system, associated with the Glenn-Colusa irrigation infrastructure, highlights the transition from natural creek systems like Funks Creek to man-made agricultural waterways. Survey markers such as VABM Windgage 779 indicate the remote nature of the western ridges, which are accessed primarily by private roads.