South Dakota Highway 73

South Dakota Highway 73 (SD 73) is a state route that runs across western South Dakota. It begins at the Nebraska border north of Merriman, Nebraska, as a continuation of Nebraska Highway 61. It runs to the North Dakota border, where it continues as North Dakota Highway 49. It is just more than 255 miles (410 km) in length.

Highway 73 marker

Highway 73

Route of SD 73 (in red)
Route information
Maintained by SDDOT
Length255.291 mi[1][2] (410.851 km)
Existed1926–present
Major junctions
South end N-61 at the Nebraska border
Major intersections
North end ND 49 at Thunder Hawk
Location
CountryUnited States
StateSouth Dakota
CountiesBennett, Jackson, Haakon, Ziebach, Meade, Perkins, Corson
Highway system
  • South Dakota State Trunk Highway System
← SD 71→ SD 75

History

When designated in the 1920s, South Dakota 73 only consisted of the segment from Faith (U.S. Route 212) to Lemmon (U.S. Route 12). The remainder of the route was unnumbered.

Around 1935, SD 73 was extended south from Faith, absorbing what had been a portion of South Dakota Highway 24 to near Plainview, then southeast via a new route to Philip. From there, it was concurrent with U.S. Highway 16 to Kadoka then southward along what had been South Dakota Highway 63. It continued south to the Nebraska border south of Martin, after sharing an alignment with U.S. Highway 18. Except for minor route straightening and a new concurrency with Interstate 90, this route has not changed since.

Around 1979, the northern terminus was extended east along U.S. 12 to Thunder Hawk, where it met up with a new road to link with ND 49.

Major intersections
CountyLocationmi[1][2]kmDestinationsNotes
Cherry​0.0000.000
 N-61 south		Continuation into Nebraska
BennettMartin12.58020.246
 US 18 west		Western end of US 18 concurrency
​24.64639.664
 US 18 east		Eastern end of US 18 concurrency
Jackson​50.33981.013 SD 44
Kadoka69.951112.575 SD 248
70.310–
70.328		113.153–
113.182
 I-90 east		Eastern end of I-90 concurrency
​76.616–
77.227		123.301–
124.285
 I-90 west		Western end of I-90 concurrency
HaakonPhilip92.047148.135 US 14
​116.740187.875
 SD 34 east		Eastern end of SD 34 concurrency
Ziebach
 No major junctions
Meade​145.523234.197
 SD 34 west		Western end of SD 34 concurrency
Faith173.638279.443
 US 212 east		Eastern end of US 212 concurrency
​176.801284.534
 US 212 west		Western end of US 212 concurrency
Perkins​206.704332.658
 SD 20 east		Southern end of SD 20 concurrency
​212.698342.304
 SD 20 west		Northern end of SD 20 concurrency
​240.858387.623
 US 12 west		Western end of US 12 concurrency
Corson​254.618409.768
 US 12 east		Eastern end of US 12 concurrency
Sioux​255.291410.851
 ND 49 north		Continuation into North Dakota
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. "State Highway Log: Pierre Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.
  2. "State Highway Log: Rapid City Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.
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