- Christmas flood of 1964
Christmas flood of 1964 Duration: 20 days Areas affected: Oregon, California, and Washington states
The Christmas flood of 1964 was a major flood that took place in the Pacific Northwest of the United States between December 18, 1964 and January 7, 1965, spanning the Christmas holiday. Considered a 100-year flood, it was one of the worst floods to affect the Willamette River in Oregon, but it also had an impact on parts of southwest Washington, Idaho, Nevada, and especially Northern California. In Oregon seventeen people died as a result of the disaster, and it caused hundreds of millions of dollars in damage. The flooding covered 152,789 acres (61,831.5 ha). The National Weather Service rated the flood as the fifth most destructive weather event in Oregon in the 20th century.
An atypical cold spell began in Oregon about December 13, 1964, that froze the ground, and was followed by unusually heavy snow. Next came a Pineapple Express storm bringing large amounts of warm rain. The temperature was raised by 30 to 40 °F (-1 to 4 °C), thawing the snow, but the ground remained frozen. Some places received the equivalent of a year's rain in just a few days. Albany received 13 inches (330 mm) of rain in December, almost double its average rainfall of 7 inches (200 mm). Detroit recorded an extra 18 inches (460 mm) of rain, and at Crater Lake, where the average normal December rainfall is 12 inches (300 mm), there was over 38 inches (970 mm) of rain. As rivers and streams began to overflow and the still-frozen ground became saturated, reports began coming in from all over the state of mudslides, closed roads and reservoirs filled far over capacity. Many small towns became isolated. By the end of the flood, every river in Oregon was above flood stage and more than thirty major bridges were impassable.
Heavy warm rain and melting snow caused more flooding in late January 1965, after the waters had begun to recede from the December flood. More mudslides occurred in places that had withstood the December flooding, and there were more deaths. Many streams in the northern San Joaquin Valley reached higher flows than they had in December.
Impact and aftermath
The Christmas flood of 1964 was "the most severe rainstorm to ever occur over central Oregon, and among the most severe over western Oregon since the late 1870s", according to the National Weather Service office in Portland.
Some of the worst mudslides occurred in the Mount Hood Corridor, and one man died in a mud and debris avalanche near Rhododendron that destroyed 15 houses. Other deaths occurred from drowning and electrocution, and one man died when the new John Day bridge collapsed.
On the Oregon Coast, downtown Reedsport was flooded with 8 feet (2 m) of water, and in Coos Bay, a massive logjam contributed to severe flooding. The ports at Gold Beach and Brookings were destroyed.
At Oregon City, Willamette Falls was unrecognizable as a waterfall, and the city was flooded by several feet of water. In Portland, the lower deck of the Steel Bridge was underwater and had also been hit by a log raft consisting of 1,000 logs. The impact of the raft severely damaged the Hawthorne Bridge, closing it for a year. At 12 feet (3.7 m) above flood stage, the flooding of the Willamette River at Portland in 1964 was second only to the 1948 flood that wiped out Vanport City. At its peak, the water was at the top of Downtown Portland's seawall.
Starting December 21, intense downpours all across Northern California caused numerous streams to flood, many to record breaking levels. California governor Edmund G. Brown declared 34 counties in the region disaster areas. Together, Del Norte, Humboldt, Mendocino, Siskiyou, Trinity, and Sonoma counties sustained more damage than the other 28 counties combined.
Governor Brown was quoted as saying that a flood like this could "happen only once in 1,000 years," and it was later often referred to as the Thousand Year Flood. The flood killed 19 people, 4,000 head of livestock, and caused $100 million in damage in Humboldt County alone. Twenty-six U.S. Geological Survey (USGS) stream gages were destroyed.
The Eel, Smith, Klamath, and Salmon rivers reached flood stage simultaneously, breaking all previous records. Sixteen state highway bridges were destroyed in California's 1st congressional district, most of them on Highway 101, and another ten county bridges were destroyed in Humboldt County. The flood also took out the region's major railroads, and many Del Norte and Humboldt county communities were left isolated. Klamath, Orleans, Myers Flat, Weott, South Fork, Shively, Pepperwood, Stafford, and Ti-Bar were all completely demolished. Metropolitan, Rio Dell, and Scotia were significantly damaged. Crescent City, still recovering from the tsunami created by the 1964 Alaska earthquake only nine months earlier, also suffered from the floods.
Over 22 inches (550 mm) of rain fell on the Eel River basin in a span of two days. By December 23, 752,000 cubic feet per second (21,300 m3/s) of water rushed down the Eel River at Scotia (still upstream from the confluence of the Van Duzen River), 200,000 cubic feet per second (5,660 m3/s) more than the 1955 Flood, and more than the average discharge of the entire Mississippi River basin. Just under 200,000 cubic feet per second (5,660 m3/s) of water flowed down the South Fork Eel River alone, causing severe damage along its entire length. Every single stream gage on the Eel River was destroyed.
The Smith River, located in Del Norte County near the Oregon border, reached flows of 228,000 cubic feet per second (6,460 m3/s) at Hiouchi, easily surpassing the 1955 flood's previous record of 165,000 cubic feet per second (4,670 m3/s). The town of Gasquet received 26.6 inches (676 mm) of rain over an eight-day period, and Crescent City, California received 9.2 inches (230 mm).
The Klamath River, which flows 263 miles (423 km) from Klamath Falls, Oregon to Klamath, reached flows of 557,000 cubic feet per second (15,800 m3/s). The town of Klamath was submerged by 15 feet (4.6 m) of water.
One of the Klamath's largest tributaries, the Trinity River, also flooded and wrought destruction along its length. The Trinity, however, did not break the 1955 Flood's records because of the newly constructed Trinity Dam, which stored 372,200 acre feet (459,100,000 m3) of runoff from the storm. Nonetheless, an impressive 231,000 cubic feet per second (6,540 m3/s) of water rushed down the river at Hoopa.
Between December 20 and December 26, a staggering 10,390,000 acre feet (12.82 km3) of water flowed into the Pacific Ocean from various streams on the North Coast.
In the Central Valley, the Yosemite Valley was flooded, and people in Yuba City evacuated. Many streams reached record flood stages, including the Feather River, Yuba River, American River, Cottonwood Creek, and Butte Creek. The flood caused the uncompleted Hell Hole Dam on the Rubicon River to fail, sending even more water downstream. In total, 375,000 acres (152,000 ha) of the Central Valley was flooded.
In southwest Washington, rising rivers threatened Centralia and Longview–Kelso and closed Interstate 5 and all railways at flooded Kalama for over a week. In Nevada, the Truckee River threatened Reno.
- Great Flood of 1862
- Willamette Valley Flood of 1996
- ^ a b c d e f g h i j k l Lucia, Ellis (1965). Wild Water: The Story of the Far West's Great Christmas Week Floods. Portland, Oregon: Overland West Press. OCLC 2475714.
- ^ "Lower Columbia River Basin" (PDF). United States Army Corps of Engineers. http://www.nwp.usace.army.mil/pa/docs/wrdb/2000/lowercolumbia.pdf. Retrieved December 31, 2010.
- ^ a b c d e f g h i j k l m n o p q r s Dresbeck, Rachel (2006). "The Willamette River Flood". Oregon Disasters: True Stories of Tragedy and Survival. Guilford, Connecticut: Insiders' Guide. pp. 89–96. ISBN 9780762739936. OCLC 69680034.
- ^ Gregory, Stan; Ashkenas, L.; Jett, S.; Wildman, R. (2002). "Flood Inundations/FEMA Floodplains" (PDF). Willamette River Basin Planning Atlas. Corvallis, Oregon: Oregon State University Press. p. 28. ISBN 9780870715426. OCLC 50591046. http://www.fsl.orst.edu/pnwerc/wrb/Atlas_web_compressed/3.Water_Resources/3e.flood&fema_web.pdf. Retrieved December 31, 2010.
- ^ a b "Oregon's Top 10 Weather Events of 1900s: Floods of December 1964 to January 1965". Portland, Oregon: National Weather Service Forecast Office. http://www.wrh.noaa.gov/pqr/paststorms/index.php#top5. Retrieved December 31, 2010. Note: Surpassed only by the Heppner Flood of 1903, the Vanport Flood of 1948, the Columbus Day Storm of 1962, and the Tillamook Burn of 1933, 1939, 1945, and 1951.
- ^ a b c "1964 Christmas Flood". Oregon Department of Transportation. http://www.oregon.gov/ODOT/CS/BSS/historycenter.shtml#1964_Christmas_Flood. Retrieved December 31, 2010.
- ^ a b c d e f g h i j k l m n o p California Department of Water Resources (January 1965). Flood!. Sacramento, California: California Department of Water Resources. OCLC 8135568. http://www.archive.org/stream/x5flooddecember196161calirich#page/n3/mode/2up. Retrieved July 26, 2011.
- ^ a b c "11477000 Eel River at Scotia, California" (PDF). United States Geological Survey. pp. 11-1–11-2. http://pubs.usgs.gov/sir/2008/5164/pdf/sir20085164_EelRiver.pdf. Retrieved July 18, 2011.
- ^ Kammerer, J.C. (May 1990). "Largest Rivers in the United States". United States Geological Survey. http://pubs.usgs.gov/of/1987/ofr87-242/. Retrieved July 18, 2011.
- ^ "11532500 Smith River Near Crescent City, CA" (PDF). United States Geological Survey. 2005. http://wdr.water.usgs.gov/wy2005/pdfs/11532500.2005.pdf. Retrieved July 27, 2011.
- ^ "11530500 Klamath River Near Klamath, CA" (PDF). United States Geological Survey. 2005. http://wdr.water.usgs.gov/wy2005/pdfs/11530500.2005.pdf. Retrieved July 27, 2011.
- ^ "11530000 Trinity River At Hoopa, CA" (PDF). United States Geological Survey. 2005. http://wdr.water.usgs.gov/wy2005/pdfs/11530000.2005.pdf. Retrieved July 27, 2011.
- History of the Christmas week flood from Salem Public Library
- The '64 flood story from Mail Tribune
- Images of the 1964 flood from Salem Public Library
- Images of the 1964 flood in Corvallis from the University of Oregon Library digital archives
- Images of the 1964 Eel River Flood near Van Arsdale Reservoir from the Potter Valley Irrigation District
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