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1966 Map of Evergreen Ridge

Name: 1966 Topographic Map of Evergreen Ridge
Creator: U.S. Geological Survey
Published: 1968
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1968

About this map

Evergreen Ridge and the broad basalt plateaus of Grant County dominate this mid-century survey of Central Washington's arid interior. The landscape is defined by the massive engineering projects of the Columbia Basin Project, characterized by an extensive irrigation network including the Aqueduct, a large Siphon, and the Evergreen Pumping Plant. These features facilitated the movement of water from the Columbia River to the agricultural lands above the coulees.

Water management and resource extraction are the primary human imprints on this terrain. While the lower elevations feature the Frenchman Coulee and several small water bodies like Cabin Lake and Caliche Lakes, the higher ground is marked by numerous mines and borrow pits. The map also details early road developments such as H Lane and J Lane, which provided access to the storage infrastructure and pumping stations essential to the region's developing irrigation economy.