*** Welcome to piglix ***

Spanish Fork (Utah)

Spanish Fork
Thistlelandslideusgs.jpg
The river dammed by the 1983 Thistle landslide
Country United States
State Utah
Tributaries
 - left Thistle Creek
 - right Soldier Creek, Diamond Fork
Source Confluence of Soldier and Thistle Creeks
 - location Wasatch Range
 - coordinates 39°59′41″N 111°29′55″W / 39.99472°N 111.49861°W / 39.99472; -111.49861 
Mouth Utah Lake
 - location Provo Bay
 - elevation 4,495 ft (1,370 m)
 - coordinates 40°10′03″N 111°44′42″W / 40.16750°N 111.74500°W / 40.16750; -111.74500Coordinates: 40°10′03″N 111°44′42″W / 40.16750°N 111.74500°W / 40.16750; -111.74500 
Length 20 mi (32 km)
Basin 675 sq mi (1,748 km2)
Discharge for Castilla, Utah
 - average 237 cu ft/s (7 m3/s)
 - max 5,000 cu ft/s (142 m3/s)
 - min 20 cu ft/s (1 m3/s)
Jordan River Basin.png
Map of the Jordan River watershed including the Spanish Fork

The Spanish Fork River or Spanish Fork is a river in the U.S. state of Utah. Formed by the confluence of Soldier Creek and Thistle Creek in the Wasatch Range, the river flows about 20 miles (32 km) northwest into Utah Lake, passing the towns of Spanish Fork and Palmyra.

Located entirely in Utah County (though a small portion of its drainage basin extends into Carbon County), the Spanish Fork is heavily used for irrigation. The Spanish Fork valley has been intensively farmed since Mormons first settled the region in the 1860s, but as the amount of agricultural land grew the river was no longer able to provide sufficient water except in years of heavy runoff. In 1909, the U.S. Bureau of Reclamation completed a tunnel to supplement the Spanish Fork's flow using water from the Strawberry River through the Strawberry Valley Project, part of the Central Utah Project.

In 1983, the river was catastrophically dammed by a landslide to a height of 220 feet (67 m). An 8-mile (13 km)-long lake formed behind the barrier, drowning the town of Thistle and a section of U.S. Route 89. The lake lasted for five months before a bypass project was completed to drain the water through a tunnel. This landslide is considered one of the most costly ever to have occurred in the United States.



...
Wikipedia

...