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The Columbia River in North America

Map of dams

Caption: The Columbia River carved the Interior Columbia River Basin from the landscape of seven Western states and two Canadian provinces. The river itself flows from its headwaters in British Columbia, Canada through only two states, forming part of the Washington-Oregon border, the vast Interior Columbia River Basin is defined by the area drained by the river and its many tributaries. This 58-million-hectare area (about the size of France) extends roughly from the crest of the Cascade Mountains of Oregon and Washington east through Idaho to the Continental Divide in the Rocky Mountains of Montana and Wyoming, and from the headwaters of the Columbia River in Canada to the high desert of northern Nevada and northwestern Utah.

Primary Source: U.S. Army Corps of Engineers, North Pacific Region (

Secondary source:

Public domain This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.

Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision.

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The following pages on the English Wikipedia link to this file (pages on other projects are not listed):
  • Columbia River
  • Snake River
  • Rocky Reach Dam
  • Rock Island Dam
  • Wanapum Dam
  • Priest Rapids Dam
  • Bonneville Dam
  • Salmon River (Idaho)
  • Columbia Basin
  • Hydroelectric dams on the Columbia River
  • Chief Joseph Dam
  • Mica Dam
  • Revelstoke Dam
  • McNary Dam
  • The Dalles Dam
  • John Day Dam
  • Keenleyside Dam
  • Little Goose Lock and Dam
  • Lower Granite Lock and Dam
  • Lower Monumental Lock and Dam
  • Ice Harbour Lock and Dam
  • Dworshak Dam
  • Albeni Falls Dam
  • Hungry Horse Dam