The Portneuf River, seen from U.S. Highway 30 west of Soda Springs
The Portneuf River is a tributary of the Snake River, approximately 96 mi (156 km) long, in southeastern Idaho in the United States. It drains a ranching and farmer valley in the mountains southwest of the Snake River Plain near the Utah border. The city of Pocatello sits along the river near its emergence from the mountains onto the Snake River Plain.
It rises in western Caribou County, approximately 25 mi (40 km) east of Pocatello, along the eastern side of the Portneuf Range. It flows initially south, passing westward around the southern end of the range, and then turning north to flow between the Portneuf Range to the east and the Bannock Range. It flows northwest through downtown Pocatello and enters the Snake at the northeast corner of American Falls Reservoir, approximately 10 mi (16 km) northwest of Pocatello.
The valley of the Portneuf provided the route of the Oregon Trail and California Trail in the middle 19th century. After the discovery of gold in Idaho, it became a significant stage route for the transportation of people and goods. In 1877 the valley was used as the route of the Utah and Northern Railway, the first railroad in Idaho.
External link
Idaho State University: Portneuf River (http://www.isu.edu/bios/prep/river.htm)
It was authorized in accordance with House Document 531, which specifically listed the project, "PortneufRiver and Marsh Creek, Idaho," as cleared for authorization without objection.
The project provides for flood control at Pocatello, Blackrock, and Inkom (on the PortneufRiver), as well as along most of the length of its main tributary, Marsh Creek.
The three reaches of the PortneufRiver, totaling about 16 miles, require channel straitening and improvement, the removal of obstructions and, in some places, levees or improvements to existing levees.
Idaho is one of the Pacific Slope States, lying like a roughly shaped rudder, and stretching 485 miles south from the boundary separating the United States from Canada, with its base extending east from Oregon to Wyoming.
Idaho was admitted as the forty-fourth state of the Union on 3 July, 1890, having previously adopted its constitution in November, 1889.
The main event in the political history of Idaho was the disenfranchisement of the Mormons in 1883, but their disclaimer of polygamy in 1897 led to the restoration of citizenship to a large number of their body.
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