Question: The Hagen Site is an archaeological site in this place with a population of 8,966.

full_context: Document 1: Dawson County, Montana: Dawson County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 8,966. Its county seat is Glendive.
Document 2: Savenac Nursery Historic District: Savenac Nursery Historic District is located near Haugan in Mineral County, Montana. It is 15 miles from St. Regis, Montana. Savenac was once one of the largest and oldest USDA Forest Service tree nurseries in the western United States, operating from 1907 until 1969. The nursery was created by Elers Koch, of the Forest Service, who also helped fight the Great Fire of 1910 that destroyed much of the Rocky Mountains in the northern part of USA, including the nursery. Savenac once produced over 12 million seedlings annually for use in reforestation of national forests throughout the United States. Its former operations have been moved to the Coeur d'Alene Nursery in Idaho.
Document 3: Bannack, Montana: Bannack is a ghost town in Beaverhead County, Montana, United States, located on Grasshopper Creek, approximately 11 mi upstream from where Grasshopper Creek joins with the Beaverhead River south of Dillon. Founded in 1862, the town contemporarily operates as a National Historic Landmark and is managed by the state of Montana as Bannack State Park.
Document 4: Bozeman, Montana: Bozeman is a city in and the county seat of Gallatin County, Montana, United States, in the southwestern part of the state. The 2010 census put Bozeman's population at 37,280 and by 2016 the population rose to 45,250, making it the fourth largest city in the state. It is the principal city of the Bozeman, MT Micropolitan Statistical Area, consisting of all of Gallatin County with a population of 97,304. It is the largest Micropolitan Statistical Area in Montana and is the third largest of all of Montana’s statistical areas.
Document 5: Big Sky, Montana: Big Sky is a census-designated place (CDP) in Gallatin and Madison counties in southwestern Montana. As of the 2010 census it had a population of 2,308. It is 45 mi southwest of Bozeman. This unincorporated community straddles the two counties, is not considered a town, and has no town government. The primary industry of the area is tourism.
Document 6: Flathead County, Montana: Flathead County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 90,928, making it the fourth-most populous county in Montana. Its county seat is Kalispell. The numerical designation for Flathead County (used in the issuance of license plates) is 7. It is south from the Canada–US border of British Columbia.
Document 7: Osage Village State Historic Site: The Osage Village State Historic Site is publicly owned property in Vernon County, Missouri, maintained by the Missouri Department of Natural Resources. The historic site preserves the archaeological site of a major Native American village, that once boasted some 200 lodges housing to 2,000 to 3,000 people. The site, designated by the Smithsonian trinomial 23VE01, was also known for many years as the Carrington Osage Village Site, under which name it was designated a National Historic Landmark in 1964.
Document 8: Dutton, Montana: Dutton is a town in Teton County, Montana, United States. The population was 316 at the 2010 census. Dutton lost population from the 2010 census by 73 people of 18% of its population. It is also considered the Wheat Capital of Montana and is located in the Golden Triangle region.
Document 9: Dryhead Country: Dryhead Country is a region in Carbon County and Big Horn County in southern Montana between Bighorn Canyon and the Pryor Mountains. The locale was named after the piles of dry bison skulls that accumulated at the base of a local buffalo jump. The Dryhead region starts near the Wyoming border in Bighorn Canyon National Recreation Area and extends northward into the Crow Indian Reservation. Dryhead Creek drains a portion of the area, falling eastwards into Bighorn Canyon. The semi-arid basin is one of the most remote areas in Montana. The area is sparsely populated with isolated ranches.
Document 10: Fergus County, Montana: Fergus County is a county in the U.S. state of Montana. As of the 2010 census, the population was 11,586. Its county seat is Lewistown. The county was founded in 1885 and named for James Fergus, a Montana politician who was instrumental in creating the county (or, according to another source, John Fergus).
Document 11: Hagen Site: The Hagen Site, also designated by the Smithsonian trinomial 24DW1, is an archaeological site near Glendive in Dawson County, Montana. The site, excavated in the 1930s, is theorized to represent a rare instance of a settlement from early in the period in which the Crow and Hidatsa Native American tribes separated from one another. It was declared a National Historic Landmark in 1964.
Document 12: Cut Bank, Montana: Cut Bank is a city in and the county seat of Glacier County, Montana, United States, located just east of the "cut bank" (gorge) along Cut Bank Creek. The population was 2,869 at the 2010 census, and the estimated population in 2015 was 3,002.
Document 13: Smithsonian trinomial: Smithsonian trinomials are unique identifiers assigned to archaeological sites in many states in the United States. They are composed of one or two digits coding for the state, typically two letters coding for the county or county-equivalent within the state, and one or more sequential digits representing the order in which the site was listed in that county. The Smithsonian Institution developed the site number system in the 1930s and 1940s. (Trinomials are now assigned by the individual states.) The 48 states then in the union were assigned numbers in alphabetical order. Alaska was assigned number 49 and Hawaii was assigned number 50 after those states were admitted to the union. There are no Smithsonian trinomial numbers assigned for the District of Columbia or any United States territories.
Document 14: Blackfoot Crossing: Blackfoot Crossing Historical Park is a complex of historic sites on the Siksika 146 Indian reserve in Alberta, Canada. This crossing of the Bow River was traditionally a bison-hunting and gathering place for the Siksika people and their allies in the Blackfoot Confederacy. Nearby are the remains of an ancient earthlodge village, believed to have been built by people from the Upper Mississippi valley in what is now the United States. It is unique in being an example of a permanent village on the plains: an area associated with nomadic hunting. The crossing became an important place in Canadian history when Treaty 7 was signed here between the native nations of what is now southern Alberta and the Canadian government on behalf of the Crown in 1877. It was also here that Crowfoot, chief of the Siksika, is believed to have died and been buried. As well, Poundmaker, a chief of the Cree who had been ceremonially adopted by Crowfoot in order to create peace between the Blackfoot and the Cree, was also buried here until being moved in 1967. In 1925 the traditional gathering site and the treaty signing site were declared National Historic Sites of Canada by the federal government's Historic Sites and Monuments Board of Canada. In 1972, the earthlodge village was also declared a national historic site.
Document 15: Bighorn Canyon National Recreation Area: Bighorn Canyon National Recreation Area is a national park unit established by an act of Congress on October 15, 1966, following the construction of the Yellowtail Dam by the Bureau of Reclamation. It straddles the border between Wyoming and Montana. The dam, named after the famous Crow leader Robert Yellowtail, harnesses the waters of the Bighorn River by turning that variable watercourse into Bighorn Lake. The lake extends 71 mi through Wyoming and Montana, 55 mi of which lie within the national recreation area. About one third of the park unit is located on the Crow Indian Reservation. Nearly one-quarter of the Pryor Mountains Wild Horse Range lies within the Bighorn Canyon National Recreation Area.
ground_truth: Dawson County, Montana