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1958 Map of Manor Slough

Name: 1958 Topographic Map of Manor Slough
Creator: U.S. Geological Survey
Published: 1985
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1985

About this map

Antelope Valley dominates the western half of this 1958 survey, where the Coast Range foothills meet the flat agricultural floor of the Sacramento Valley. This landscape is defined by the stark transition from the steep ridges above Sulphur Gap Spring to the complex irrigation and drainage network of the eastern lowlands. The presence of Mountain House at the junction of Leesville Road and Wilbur Road highlights a historical waypoint for travelers crossing the foothills towards the coast.

Water management is the central theme of the eastern portion of the map, featuring the massive Glenn-Colusa Canal and a series of natural and modified drainage features like Freshwater Slough and Glenn Valley Slough. Numerous siphons and pumps scattered along Harlan Road and Bagley Road illustrate the region's intensive reliance on engineered irrigation to support the orchard and field operations visible near Mills Orchards Road.