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1968 Map of Calderwood Reservoir

Name: 1968 Topographic Map of Calderwood Reservoir
Creator: U.S. Geological Survey
Published: 1972
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1972

About this map

Warner Valley dominates this high-desert landscape in Lake County, where complex hydrological systems define the land's utility and character. The 1968 field-check captures a series of managed water bodies, including Crump Lake and the engineered Calderwood Reservoir, which sits at an elevation of 4,733 feet. These features, alongside Greaser Reservoir and its associated spillway, reveal the efforts to control and redirect water across the arid basin.

Evidence of early human presence and industrial activity is found near the steep escarpments, notably a petroglyph located near the edge of the valley floor and several Gravel Pits along the base of the hills. A network of Jeep Trails provides the primary access through the sagebrush and across Alkali Flat, connecting remote points like Soda Lake and the winding Twentymile Slough. The map also indicates extensive fence lines, marking the intersection of public land management and private ranching interests in this corner of Oregon.