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Tanana River

Tanana River
Tanana River near Fairbanks, Alaska
Name origin: from the Koyukon (Athabaskan) tene no, tenene, meaning "trail river".
Country United States
State Alaska
District Southeast Fairbanks Census Area, Fairbanks North Star Borough, Yukon-Koyukuk Census Area
Source confluence of the Nabesna and Chisana rivers
 - location Northway Junction, Tetlin National Wildlife Refuge
 - elevation 1,672 ft (510 m) [1]
 - coordinates  [2]
Mouth Yukon River
 - location near Tanana
 - elevation 200 ft (61 m) [2]
 - coordinates  [2]
Length 584 mi (940 km)
Basin 44,000 sq mi (113,959 km2) [3]
Discharge mouth
 - average 41,800 cu ft/s (1,184 m3/s) [3]
Course of the Tanana River, formed by the shorter Nabesna River (left) and Chisana River (right), then flowing northwest to meet the Yukon River
Wikimedia Commons:

The Tanana River is a 584-mile (940 km) tributary of the Yukon River in the U.S. state of Alaska.[n 1] According to linguist and anthropologist William Bright, the name is from the Koyukon (Athabaskan) tene no, tenene, literally "trail river".[7]

The river's headwaters are located at the confluence of the Chisana and Nabesna rivers just north of Northway in eastern Alaska.[8] The Tanana flows in a northwest direction from near the border with the Yukon Territory, and laterally along the northern slope of the Alaska Range, roughly paralleled by the Alaska Highway.[8] In central Alaska, it emerges into a lowland marsh region known as the Tanana Valley and passes south of the city of Fairbanks.[8]

In the marsh regions it is joined by several large tributaries, including the Nenana (near the city of Nenana) and the Kantishna. It empties into the Yukon approximately 70 miles (110 km) downriver from the village of Manley Hot Springs, near the town of Tanana.[8]

Ice on the river accumulates each winter to an average maximum thickness of 43 inches (110 cm) at Nenana.[9] The Nenana Ice Classic, begun in 1917, is an annual guessing game about the date of the ice break-up.[9] In October or November, after the freeze has begun, a tripod is planted in ice in the middle of the river. The tripod is connected to an on-shore clock that stops when the tripod begins to move during the spring thaw. Over the years, the break-up date has varied from April 20 to May 20.[9] Betting on the exact time of the break-up takes the form of a lottery, called the Nenana Ice Classic.


  • History 1
  • Nenana Ice Classic 2
  • Major tributaries (in descending order of elevation) 3
  • See also 4
  • Notes and references 5
  • Works cited 6


Human habitation of the Yukon basin, including the Tanana watershed, began more than 12,000 years ago.[10] Several sites in the watershed have produced evidence of occupation by Paleo-Arctic people. Later residents include people of the Tanana tribe, which has had a presence in the region for 1,200 years.[10]

In the summer of 1885, Lieutenant Henry Tureman Allen of the U.S. Army undertook the first recorded exploration of the Tanana River. In 1883, Lieutenant Frederick Schwatka and his party had entered the Yukon watershed by way of Canada and floated to the mouth of the Yukon. Allen's goal was to find an all-Alaska route to the Yukon River. He and his men ascended the Copper River, crossed into Tanana River drainage, and descended the Tanana to the Yukon and down it to the mouth. During the five-month trip, the Allen party mapped the courses of the Copper, Tanana, and Koyukuk rivers.[11]

In the early 21st century, the basin is largely wilderness unchanged by human activity. Fairbanks, a metropolitan area with about 80,000 residents in 2005, is a center of placer gold mining, which has continued in the basin since the mid-19th century. Limited farming also occurs in the valley near Fairbanks.[10]

Nenana Ice Classic

Since the early 1900s, Alaskans have been gambling on the when the river would melt. Each year, thousands pay $2.50 to guess the exact date and minute the Tanana River ice will go out in Nenana. The Nenana Ice Classic is a fundraiser for local charities and has awarded some large prizes. In 2010, after the ice went out on April 29, three lottery winners split a jackpot of $279,030.[12] In 2012, the record prize was $350,000.[13]

Major tributaries (in descending order of elevation)

The Trans-Alaska Pipeline crosses beneath several rivers, but has a pipeline bridge where it crosses the Tanana just north of Delta Junction.
Tanana River in winter, 10 miles (16 km) west of Fairbanks

See also

Notes and references

  1. ^ The main-stem length is calculated by subtracting the length of the Nabesna River from the length, 659 mi (1,061 km), listed by J.C. Kammerer in "Largest Rivers in the United States".[4] The Nabesna River is roughly 75 mi (121 km) long, calculated by adding the 60 mi (97 km) from the Nabesna mouth to Camp Creek[5] to the distance, 15 mi (24 km), from Camp Creek to Nabesna Glacier,[6] Kammerer's most remote source for the Tanana.
  1. ^ Source elevation derived from Google Earth search using GNIS source coordinates.
  2. ^ a b c "Tanana River". Geographic Names Information System. United States Geological Survey. January 1, 2000. Retrieved April 28, 2011. 
  3. ^ a b Benke and Cushing, p. 797
  4. ^ Kammerer, J.C. (September 1, 2005). "Largest Rivers in the United States". United States Geological Survey. Retrieved April 28, 2011. 
  5. ^ Irwin, Thomas (October 3, 2005). "Recordable Disclaimer of Interest Application for the Nabesna River" (PDF). U.S. Bureau of Land Management. Retrieved February 19, 2011. 
  6. ^ Alaska Atlas and Gazetteer (Map) (7th ed.). DeLorme. 2010. p. 98.  
  7. ^  
  8. ^ a b c d Alaska Atlas and Gazetteer (Map) (7th ed.). DeLorme. 2010. pp. 107–09; 112–17; 122.  
  9. ^ a b c "Nenana Ice Classic: Tanana River Ice Annual Breakup Dates". National Snow and Ice Data Center. Retrieved April 28, 2011. 
  10. ^ a b c Benke and Cushing, p. 787
  11. ^ "America's Territory: Exploration and Mapping of Alaska’s Land". Alaska Humanities Forum. Retrieved April 28, 2011. 
  12. ^ "Push begins for online Ice Classic ticket sales". Fairbanks Daily News-Miner (Juneau Empire). April 3, 2011. Retrieved April 28, 2011. 
  13. ^

Works cited

  • Benke, Arthur C., ed., and Cushing, Colbert E., ed. (2005). Rivers of North America. Burlington, Massachusetts: Elsevier Academic Press. ISBN 0-12-088253-1.
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