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The 2011 flooding on the 
On May 24 at Shawmut, near Harlowton, a record pace was set, with a flow rate of . The average flow is at that spot for May 24. The prior record at Shawmut was set in 2005 with a rate of . Several roads in the Musselshell watershed were already closed by this date.
The town of 
By June 23, the Musselshell had receded back below its banks, FEMA had assessed damage to public lands and was back in Roundup to assess damage to private lands and properties.
Flooding on the unconnected Yellowstone River to the south prompted the closing of a portion of
Current and historic crest levels of the Musselshell MT USGS station
Timeline of Musselshell history
{{DEFAULTSORT:Musselshell River flood Musselshell Natural disasters in Montana Musselshell River flood Musselshell River flood
Musselshell River
The Musselshell River is a tributary of the Missouri River, long from its origins at the confluence of its North and South Forks near Martinsdale, Montana to its mouth on the Missouri River. It is located east of the Continental divide entire ...
in Montana began about May 21, affecting large parts of central Montana. At Mosby, Montana
Mosby (also Half-Breed Crossing) is a tiny unincorporated community in southwestern Garfield County, Montana, United States. It lies along Highway 200 southwest of the town of Sand Springs, its nearest neighboring settlement. Its elevation is a ...
, the river crested at on Monday, May 23. The flood level at Mosby is and the record crest at that point along the Musselshell is , set in 1993. The flooding was caused by up to of rain combined with snowmelt.
On May 24 at Shawmut, near Harlowton, a record pace was set, with a flow rate of . The average flow is at that spot for May 24. The prior record at Shawmut was set in 2005 with a rate of . Several roads in the Musselshell watershed were already closed by this date.
The town of Roundup
A roundup is a systematic gathering together of people or things.
Roundup, Round Up or Round-up may also refer to:
Agriculture
* A muster (livestock) (AU/NZ) or a roundup (US/CA) is the process of gathering livestock.
* Roundup (herbicide), a M ...
suffered the most damage of any community along the Musselshell. Potable water, food, and medicine were major concerns. Flood waters along the Musselshell near Roundup were as much as deep, cresting over the weekend. Flooding near Roundup was at least above record flood level and forced the evacuation of dozens of homes. On Thursday, May 26 the flooding inundated portions of Roundup, At Highway 87 the floodwaters were flowing at over , more than 10 times the normal rate. On May 26 the Musselshell crested near Roundup at . Its flood stage there is . The previous record for that location was set in 1975 at . In Petroleum County alone damage costs were estimated at US$1.5 million.
By June 23, the Musselshell had receded back below its banks, FEMA had assessed damage to public lands and was back in Roundup to assess damage to private lands and properties.
Flooding on the unconnected Yellowstone River to the south prompted the closing of a portion of Interstate 90
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and ...
from Livingston
Livingston may refer to:
Businesses
* Livingston Energy Flight, an Italian airline (2003–2010)
* Livingston Compagnia Aerea, an Italian airline (2011–2014), also known as Livingston Airline
* Livingston International, a North American custom ...
to Springdale. Floodwaters from the tributary Pryor creek led to closing of Pompeys Pillar National Monument
Pompeys Pillar National Monument is a rock formation located in south central Montana, United States. Designated a National Monument on January 17, 2001, and managed by the U.S. Bureau of Land Management in conjunction with The Friends of Pom ...
. The Little Bighorn River and related tributaries flooded the area around Crow Agency and shut down Interstate 90 from Hardin to the Wyoming line for several days. Montana counties that were affected by the state-wide flooding in Spring 2011 include: Big Horn, Carbon, Garfield, Granite, Jefferson Jefferson may refer to:
Names
* Jefferson (surname)
* Jefferson (given name)
People
* Thomas Jefferson (1743–1826), third president of the United States
* Jefferson (footballer, born 1970), full name Jefferson Tomaz de Souza, Brazilian foo ...
, Judith Basin, Missoula, Musselshell, Petroleum, Sanders
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Surname
* Sanders (surname)
* Bernie Sanders, US presidential candidate and senator
* Sarah Huckabee Sanders, former White House press secretary and daughter of Mike Huckabee
* Colonel Sanders, founder of KFC (Kentuc ...
, Wheatland, and Yellowstone. A state of emergency was declared in 51 Montana counties, cities, and Indian reservations. Flood waters from the Musselshell, Yellowstone, and several other Montana rivers flow into the Missouri River and Mississippi River, exacerbating the 2011 flooding in states such as North Dakota and South Dakota.
See also
*2011 Mississippi River floods
Major floods along the Mississippi River in April and May 2011 were among the largest and most damaging recorded along the U.S. waterway in the past century, comparable in extent to the Great Mississippi Flood of 1927 and Great Flood of 1993. In ...
* 2011 Missouri River Flood
The 2011 Missouri River floods was a flooding event on the Missouri River in the United States.The flooding was triggered by record snowfall in Rocky Mountains of Montana and Wyoming along with near-record spring rainfall in central and easter ...
References
External links
Current and historic crest levels of the Musselshell MT USGS station
Timeline of Musselshell history
{{DEFAULTSORT:Musselshell River flood Musselshell Natural disasters in Montana Musselshell River flood Musselshell River flood