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141 results
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Willamette River flood of 1996
In 1996, as part of a larger pattern of winter flooding in the Pacific Northwest, the Willamette River experienced a major flooding, threatening the City …
Oregon Encyclopedia
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Willamette River flood of 1964
The Willamette River, in its natural state, was subject to annual flooding. Draining an area of over 11,200 square miles, the river supplied water …
Oregon Encyclopedia
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Willamette River flood of 1894
The Willamette River, in its natural state, has been subject to annual flooding, at times severe. Draining an area of over 11,200 square miles, …
Oregon Encyclopedia
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Heppner flood of 1903
In the rolling wheat fields of north-central Oregon's Morrow County lies the city of Heppner. Willow Creek meanders through the center of town, a …
Oregon Encyclopedia
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Willamette Valley
The Willamette Valley, bounded on the west by the Coast Range and on the east by the Cascades, is the largest river valley in …
Oregon Encyclopedia
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Columbia River Treaty (1964)
The high-voltage power lines that march across central Oregon, linking Columbia River dams to Los Angeles, California, are “proof of the power of cooperation and …
Oregon Encyclopedia
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U.S. Army Corps of Engineers
The U.S. Army Corps of Engineers, a hybrid military and civilian federal agency, developed Oregon's water transportation infrastructure and played a major role in the …
Oregon Encyclopedia
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Columbia River
The River
For more than ten millennia, the Columbia River has been the most important and intensively used part of Oregon’s natural landscape. The river’s main …
Oregon Encyclopedia
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Champoeg
The town of Champoeg had a brief but memorable life. Instigated by geographic advantage in the 1830s, Champoeg was swept away by devastating Willamette River …
Oregon Encyclopedia
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Willamette River
The Willamette River and its extensive drainage basin lie in the greater Cascades geological province, extending from British Columbia to northern California. The river and …
Oregon Encyclopedia
