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 marker

Highway 75

Route of SD 75 (in red)
Route information
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
CountryUnited States
StateSouth Dakota
CountiesPerkins
Highway system
  • South Dakota State Trunk Highway System
← SD 73→ SD 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 north		Continuation beyond North Dakota state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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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