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2017 Map of Rock Island Dam

Name: 2017 Topographic Map of Rock Island Dam
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Rock Island Dam anchors this landscape where the Columbia River separates Chelan and Douglas counties. The settlement of Voltage sits just north of the dam, overlooking the Rock Island Pool and the complex hydro-infrastructure that has defined this stretch of the river for decades. The terrain is marked by significant elevation changes, from the riverbank up to Jumpoff Ridge and Badger Mtn.

Deep canyons and coulees, including the notable Moses Coulee and Francis Canyon, cut through the basalt plateaus. Local landmarks like Lone Rock and Rocky Point provide reference points for land managers and geologists. The map also traces a network of access roads such as Colockum Rd and Palisades Rd SW, which navigate the steep side-canyons like Scroggie Canyon and Whitson Canyon branching off the main river valley.