South Dakota Highway 75

South Dakota Highway 75 (SD 75) is a state route located in northwest South Dakota. The southern terminus is at South Dakota Highway 20 west of Bison, and the route runs northerly to the North Dakota border, becoming North Dakota Highway 8. It is 28 miles (45 kilometers) in length.

Highway 75
Route of SD 75 (in red)
Route information
Defined by SDCL §31-4-177
Maintained by SDDOT
Length29.352 mi[1] (47.237 km)
Existed1976–present
Major junctions
South end SD 20 west of Bison
North end ND 8 south of Hettinger, N.D.
Location
CountiesPerkins
Highway system
  • South Dakota Highways
← SD 73SD 79 →

History

This is the third use of the South Dakota 75 designation.

The first South Dakota 75 was designated around 1934, in southeast Shannon County. It was originally 10 miles (16 km) long, with its northern terminus at U.S. Highway 18. When that route was realigned southward, SD 75 was shortened to 3 miles (4.8 km). This configuration remained in place until 1976, when it was redesignated as South Dakota Highway 391.

The second use of SD 75 was implemented around 1949, in northwest South Dakota. It was located in northeast Harding County, beginning at South Dakota Highway 8 (current SD 20) and extending northward to the North Dakota border. In 1976, the SD 75 designation was moved approximately 18 miles (29 km) east onto its current alignment, where it remains today; the old segment became part of South Dakota Highway 79.

Major intersections

The entire route is in Perkins County.

Locationmi[1]kmDestinationsNotes
Scotch Cap Township0.0000.000 SD 20
Grand River Township29.35247.237 ND 8 northContinuation beyond North Dakota state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
gollark: Apiowhat?
gollark: A square wave is apparently in some confusing way equivalent to the sum of an infinite number of sine waves, so you get horrible interference, and it's low-power so the range is terrible.
gollark: It can generate ~100MHz square waves and you can connect up an antenna, which is *basically* what a radio transmitter would do but stupider and worse.
gollark: Yes, a clock or something.
gollark: A quirk of the raspberry pi means it can transmit FM radio with horrible interference because it can only broadcast square waves or something, because of happening to have a somewhat adjustable ~100MHz clock exposed on external pins or something.

References
  1. "State Highway Log" (PDF). Rapid City region: South Dakota Department of Transportation. January 2011. p. 94. Retrieved December 22, 2011.

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