South Dakota Highway 15
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 Route of SD 15 (in red) |
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| Route information | ||||
| Defined by SDCL §31-4-137 | ||||
| Maintained by SDDOT | ||||
| Length: | 79.430 mi[1] (127.830 km) | |||
| Existed: | 1926 (approx.) – present | |||
| Major junctions | ||||
| South end: |  I-29 West of Toronto |
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| North end: | I-29 west of Wilmot |
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| Location | ||||
| Counties: | Grant, Deuel | |||
| Highway system | ||||
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→South Dakota Highway 15 is a state route that largely runs north to south across northeastern South Dakota. The northern terminus is at the junction with Interstate 29 west of Wilmot (exit 213) and the southern terminus is at I-29 west of Toronto (exit 150). It is 78 miles (129 kilometers) in length.
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[edit] Route description
The route of SD 15 is defined in South Dakota Codified Laws § 31-4-137.[1]
[edit] History
South Dakota 15, when designated in the mid 1920's, ran north to south across the entire state, on the road known as the King of Trails. The extension of U.S. Highway 77 in 1930 largely replaced the numbering of SD 15, from Milbank to Sioux City. The northern portion of the route, from U.S. Highway 12 to the North Dakota border north of Claire City, remained in place.
In the early 1950s, changes were made to the southern end. SD 15 was rerouted so the south end was at Milbank; it then went north to Hartford Beach, then west through Wilmot to U.S. Highway 81, before heading north again. The old alignment from Wilmot to U.S. 12 was designated at South Dakota Highway 15A.
In 1976, the segment of SD 15 from the North Dakota border to Claire City was made part of a realigned South Dakota Highway 25, and the segment from Claire City to U.S. 81 near Claire City was designated as South Dakota Highway 106. At that point, the northern terminus was located at U.S. 81 west of Wilmot.
After U.S. 77 was deleted in the early 1980s, SD 15 was extended south along the former's alignment from Milbank, to the present end at I-29 west of Toronto. One little known fact is that highway 77 starts in Milbank, South Dakota and ends in downtown Dallas, Texas. It ends at the railroad overpass where President John F. Kennedy was assassinated.
[edit] Junction list
| County | Location | Mile[1] | Destinations | Notes |
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| Deuel |
0.000 |  SD 28 |
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| Clear Lake | 12.036 |  SD 22 |
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| 22.179 |  US 212 west |
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| 26.978 | US 212 east |
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| Grant |
32.542 |  SD 20 east |
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| 39.564 |  SD 20 west / SD 158 east |
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| Milbank | 46.727 |  US 12 |
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| Roberts |
60.033 |  SD 109 |
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| Wilmot | 71.529 |  SD 123 |
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| 78.364 | I-29 |
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| 79.430 | County Road 6127 | |||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus • Closed/former • Incomplete access • Unopened |
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[edit] Related routes
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| Location: | Wilmot |
| Existed: | 1950s–1976 |
South Dakota Highway 15A was a short state route in northeastern South Dakota. This route was originally part of SD 15. In the early 1950s, the alignment of SD 15 was adjusted to add a segment between Wilmot and Milbank. The old alignment, between Wilmot and U.S. Highway 12, was designated as SD 15A. In 1976, when many of the suffixed state routes were eliminated, this route was redesignated as South Dakota Highway 123.
[edit] References
- ^ a b "Transportation Inventory Management". South Dakota Department of Transportation. http://www.sddot.com/pe/data/pave.asp. Retrieved 2011-09-09.
