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25-839: Formed by the confluence of Antelope Creek and Dry Fork Creek in Wyoming, it rises in northeastern Wyoming in the Thunder Basin National Grassland in Converse County . It flows east into South Dakota, passes Edgemont , and skirts the southern end of the Black Hills , passing through Angostura Reservoir . On the east side of the Black Hills, it flows northeast, past Oral , the Buffalo Gap National Grassland , and along

50-467: A household in the county was $ 32,348, and the median income for a family was $ 40,472. Males had a median income of $ 34,321 versus $ 18,640 for females. The per capita income for the county was $ 17,366. About 6.30% of families and 9.90% of the population were below the poverty line , including 11.30% of those under age 18 and 13.60% of those age 65 or over. As of the 2010 United States Census , there were 7,208 people, 3,021 households, and 1,957 families in

75-555: A major threat due to water quality regulations. The Cheyenne River is still higher in dissolved mineral content than any other South Dakota major river. The Cheyenne watershed is part of the Missouri River watershed and spans the Mountain West and Great Plains states of northeastern Wyoming, southwestern and south central South Dakota, as well as small areas of northwestern Nebraska, and southeastern Montana. As of 2001,

100-450: A range of ecological disturbances to support diverse wildlife species. Management for biodiversity in this complex ecosystem depends on managing for a shifting mosaic of different disturbances to meet the needs of multiple species. Researchers surveyed birds on active black-tailed prairie dog colonies and previously burned areas, as well as on paired undisturbed sites, and found that only prairie dog colonies supported breeding habitat for

125-495: Is home to over 100 species of birds; large herbivores such as pronghorn and mule deer; small mammals like black-tailed prairie dogs, white-tailed jackrabbits, cotton tails, kangaroo rats, thirteen lined-ground squirrels, and bats; and predators such as swift fox, badgers, coyote and red fox. Domestic livestock grazing (sheep and cattle) is practiced by ranching families throughout the grassland. The area includes both sagebrush and grassland plant communities, which interact with

150-662: Is managed together with Medicine Bow - Routt National Forest from Forest Service offices in Laramie, Wyoming ; its local ranger district office is in Douglas . Thunder Basin National Grassland is found along the ecotone , or transition zone, between the Great Plains to the east and the sagebrush steppe to the west, and occurs across a gradient of temperature, precipitation, and elevation. As with grasslands in

175-652: The Cheyenne watershed was primarily grassland (62.8%), followed by shrubland (16.3%) and forest cover (11.9%). The primary population centers include Rapid City, South Dakota and Gillette, Wyoming . With a population of nearly 4.5 million in these states, water use was an average of 5,254 million US gallons per day (19,890 million litres per day) in 2010. This amounts to approximately 1,170 US gallons (4,400 L) per person per day. A total of 1,855 thousand acre-feet (604 billion US gallons; 2,288 billion litres) are stored in 9 lakes and reservoirs in

200-740: The Cheyenne watershed. Sedimentation is a major water quality concern for the Cheyenne watershed, potentially resulting in reduced storage capacity for reservoirs. Major water issues in the Cheyenne, reflect those of the larger Missouri River basin and stem from anticipated effects from a warming climate. Demand for water from agriculture for irrigation, greater threats to viable habitat for endangered species and wildlife are large concerns directly related to increasing temperatures and evapotranspiration. Water companies are also concerned about "water delivery" in response to shifting runoff periods. Similarly, power companies are concerned about climate effects on hydropower generation. As of November 2019, TC Energy

225-499: The Great Plains, the Thunder Basin evolved with disturbance from drought, grazing, fire and burrowing mammals. Burrowing mammals play a functional role in the grasslands. Prairie dogs increase habitat heterogeneity and biodiversity at multiple scales across the landscape by creating burrows and areas of open grassland habitat that differ from the surrounding areas and serve as habitat for other species. Thunder Basin grassland

250-471: The High Plains, and almost all of Wyoming, Weston County is overwhelmingly Republican. Since Wyoming statehood in 1890, it has been carried by a Democrat just three times. Woodrow Wilson carried the county in 1912 as a result of a split between the conservative incumbent William Howard Taft and Progressive ex-President Theodore Roosevelt , whilst in his two 1930s landslides Franklin D. Roosevelt became

275-424: The climate is semi-arid. The Grassland provides opportunities for recreation, including hiking, sightseeing, hunting, and fishing. There are no developed campgrounds; however, camping is allowed. Land patterns are very complex because of the intermingled federal, state, and private lands. In descending order of land area, it is located in parts of Weston , Converse , Campbell , Niobrara , and Crook counties. It

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300-417: The county. The population density was 3.0 people per square mile (1.2 people/km ). There were 3,533 housing units at an average density of 1.5 units per square mile (0.58 units/km ). The racial makeup of the county was 95.5% white, 1.3% American Indian, 0.3% black or African American, 0.3% Asian, 0.9% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 3.0% of

325-417: The county. The population density was 3 people per square mile (1.2 people/km ). There were 3,231 housing units at an average density of 1.3 units per square mile (0.50 units/km ). The racial makeup of the county was 95.94% White , 0.12% Black or African American , 1.26% Native American , 0.20% Asian , 0.02% Pacific Islander , 0.93% from other races , and 1.54% from two or more races. 2.06% of

350-473: The imperiled mountain plover ( Charadrius montanus ). Large, contiguous areas of sagebrush cover are required to support sage-grouse conservation. An area with prairie dog colonies of nearly 25,000 acres (10,000 ha) was reduced to about 125 acres (51 ha) after an outbreak of sylvatic plague in 2017. A 2002 grassland plan proposed providing 50,000 acres (20,000 ha) of prairie dog habitat. In Thunder Basin, historical wildfires do not promote

375-469: The invasion of cheatgrass ( Bromus tectorum) as they do in the Great Basin , where a fire-invasion feedback loop leads to plant community conversion in sagebrush ecosystems. Weston County, Wyoming Weston County is a county in the U.S. state of Wyoming . As of the 2020 United States Census , the population was 6,838. Its county seat is Newcastle . Its east boundary line abuts

400-584: The lower 35 mi (56 km) of the river forming an arm of Lake Oahe. The Belle Fourche River is the largest tributary of the Cheyenne. Rapid, Sulphur , Plum, Cherry, and Owl Creeks are important other tributaries of the Belle Fourche-Cheyenne. Snowmelt from the Black Hills provides the major source of river water. Because of the proximity to the Black Hills and its mining industry, the Cheyenne historically picked up large quantities of zinc, arsenic, and cyanide. Those pollutants are no longer

425-726: The northwestern boundary of the Pine Ridge Indian Reservation and Badlands National Park . It is joined by Rapid Creek , passes Wasta and is joined by the Belle Fourche River in eastern Meade County , after which it flows ENE along the southern boundary of the Cheyenne River Indian Reservation . Near the town of Cherry Creek , it is joined by Cherry Creek and flows into Missouri at Lake Oahe , approximately 32 mi (50 km) NNW of Pierre, South Dakota , with

450-510: The other Democrat to win Weston County, although he defeated Republican Alf Landon in 1936 by just 109 votes. Subsequent to Lyndon Johnson losing the county to Barry Goldwater by just fifty-four votes in 1964, no Democrat has passed 35 percent of Weston County's vote. Indeed, Bill Clinton in 1996 was the last Democratic to pass twenty percent. The Wyoming Department of Corrections Wyoming Honor Conservation Camp & Boot Camp

475-468: The population were Hispanic or Latino of any race. 33.0% were of German , 13.0% English , 8.9% Irish and 7.2% American ancestry. There were 2,624 households, out of which 31.10% had children under the age of 18 living with them, 60.40% were married couples living together, 7.30% had a female householder with no husband present, and 28.80% were non-families. 25.00% of all households were made up of individuals, and 11.50% had someone living alone who

500-469: The population. In terms of ancestry, 31.7% were German , 19.3% were Irish , 18.5% were English , 6.6% were Norwegian , 6.1% were Swedish , and 5.6% were American . Of the 3,021 households, 26.1% had children under the age of 18 living with them, 53.2% were married couples living together, 6.9% had a female householder with no husband present, 35.2% were non-families, and 29.9% of all households were made up of individuals. The average household size

525-489: The west line of the state of South Dakota . Weston County was created by the legislature of the Wyoming Territory on March 12, 1890, of land partitioned from Crook County . Weston County was named for John Weston, a geologist and surveyor. In 1887, Jefferson Weston and Frank Mondell found rich coal deposits north of Newcastle which caused a railroad to be built through the area. In 1911, Campbell County

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550-472: Was 2.28 and the average family size was 2.81. The median age was 42.3 years. The median income for a household in the county was $ 53,853 and the median income for a family was $ 63,438. Males had a median income of $ 53,095 versus $ 28,724 for females. The per capita income for the county was $ 28,463. About 5.8% of families and 7.9% of the population were below the poverty line , including 10.1% of those under age 18 and 10.1% of those age 65 or over. Like all of

575-440: Was 65 years of age or older. The average household size was 2.42 and the average family size was 2.88. The county population contained 24.10% under the age of 18, 7.40% from 18 to 24, 26.30% from 25 to 44, 26.70% from 45 to 64, and 15.60% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 103.10 males. For every 100 females age 18 and over, there were 103.80 males. The median income for

600-875: Was applying for permits in the state to tap the Cheyenne River to use water for the construction of Phase 4 of the Keystone pipeline , including camp construction to house transient construction workers. Thunder Basin National Grassland The Thunder Basin National Grassland is located in northeastern Wyoming in the Powder River Basin between the Big Horn Mountains and the Black Hills . The Grassland ranges in elevation from 3,600 to 5,200 feet (1,100 to 1,600 m), and

625-511: Was formed from portions of Weston County and Crook County . Since then, the boundaries of Weston County have been stable. According to the US Census Bureau , the county has a total area of 2,400 square miles (6,200 km ), of which 2,398 square miles (6,210 km ) is land and 1.9 square miles (4.9 km ) (0.08%) is water. As of the 2000 United States Census , there were 6,644 people, 2,624 households, and 1,868 families in

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