South Dakota Highway 73
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Route of SD 73 (in red) | ||||
| Route information | ||||
| Defined by SDCL §31-4-176 | ||||
| Maintained by SDDOT | ||||
| Length: | 255.291 mi[1][2] (410.851 km) | |||
| Existed: | 1926 – present | |||
| Major junctions | ||||
| South end: |
 N-61 at the Nebraska border | |||
| North end: |
 ND 49 at Thunder Hawk | |||
| Location | ||||
| Counties: | Bennett, Jackson, Haakon, Ziebach, Meade, Perkins, Corson | |||
| Highway system | ||||
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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.
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
| County | Location | mi[1][2] | km | Destinations | Notes | |||
|---|---|---|---|---|---|---|---|---|
| Cherry | 0.000 | 0.000 | N-61 south | Continuation into Nebraska | ||||
| Bennett | Martin | 12.580 | 20.246 |  US 18 west | Western end of US 18 concurrency | |||
| 24.646 | 39.664 | US 18 east | Eastern end of US 18 concurrency | |||||
| Jackson | 50.339 | 81.013 |  SD 44 | |||||
| Kadoka | 69.951 | 112.575 |  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 | |||||
| Haakon | Philip | 92.047 | 148.135 |  US 14 | ||||
| 116.740 | 187.875 |  SD 34 east | Eastern end of SD 34 concurrency | |||||
| Ziebach |
No major junctions | |||||||
| Meade | 145.523 | 234.197 | SD 34 west | Western end of SD 34 concurrency | ||||
| Faith | 173.638 | 279.443 |  US 212 east | Eastern end of US 212 concurrency | ||||
| 176.801 | 284.534 | US 212 west | Western end of US 212 concurrency | |||||
| Perkins | 206.704 | 332.658 |  SD 20 east | Southern end of SD 20 concurrency | ||||
| 212.698 | 342.304 | SD 20 west | Northern end of SD 20 concurrency | |||||
| 240.858 | 387.623 |  US 12 west | Western end of US 12 concurrency | |||||
| Corson | 254.618 | 409.768 | Eastern end of US 12 concurrency | |||||
| Sioux | 255.291 | 410.851 | ND 49 north | Continuation into North Dakota | ||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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References
- 1 2 "State Highway Log: Pierre Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.
- 1 2 "State Highway Log: Rapid City Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.