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Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States.The population was 240 at the 2020 census. [5] It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving the needs of the millions of visitors to the Mount Rushmore National Memorial, which is located just beyond the town limits.
Map of the United States with South Dakota highlighted Sioux Falls, most populous city in South Dakota Rapid City, ... Keystone: 241 240 +0.42%: Pennington:
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Pennington County, South Dakota, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map.
It splits from US 16 in the Black Hills of the southwestern part of the U.S. state of South Dakota. The highway's western terminus is an intersection with US 16, US 385, and South Dakota Highway 89 (SD 89) in Custer. The eastern terminus is at an interchange with US 16 called Keystone Wye south of Rapid City.
Pennington County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 109,222, [1] making it the second most populous county in South Dakota. Its county seat is Rapid City. [2] The county was created in 1875, and was organized in 1877. [3]
The Keystone Wye is a three-level Directional T interchange for the two divided highways, constructed in 1967–1968 as part of a project by the South Dakota Department of Transportation (SDDOT) to convert US 16 to a four-lane highway between Rapid City and Keystone. It was designed by Clyde Jundt and Kenneth C. Wilson.
Keystone or key-stone may refer to: Keystone (architecture) , a central stone or other piece at the apex of an arch or vault Keystone (cask) , a fitting used in ale casks
This map of the Falkland Islands incorporates several elements of map layout: a title, a scale bar, a legend, and an inset map. This is a compromise between the fluid and compartmentalized approaches to layout order, with the non-map elements sitting "on top" of the main map. Here, the top-heavy main map is balanced by the non-map elements below.