Map: Courtesy of Bonneville Power Administration
Map: Courtesy of Bonneville Power Administration. Drainage Area: 660,480 km 2 Estuary Area: 412 km 2. Habitat Changes in the Columbia River estuary. Total area loss = 24%. 50,000. - 65 %. + 10 %. 1870. 1980. 40,000. - 7 %. - 25 %. 30,000. Acres. 20,000. + 293 %. 10,000. 0.
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