South Dakota Highway 20

Highway 20 marker

Highway 20

Route of SD 20 (in red)
Route information
Defined by SDCL §31-4-145
Maintained by SDDOT
Length: 428.852 mi[1][2][3] (690.170 km)
Existed: 1929 – present
Western section
Length: 389.828 mi[1][2][3] (627.367 km)
West end: Montana state line near Camp Crook
Major
junctions:
US 85 in Buffalo
US 12 in Mobridge
US 83 in Selby
US 281 west of Mellette
East end: US 212 in Watertown
Eastern section
Length: 39.024 mi[3] (62.803 km)
West end: I-29 / US 81 west of South Shore
East end: MN 40 at the Minnesota state line east of Revillo
Location
Counties: Harding, Perkins, Ziebach, Dewey, Corson, Walworth, Potter, Faulk, Spink, Clark, Codington, Grant
Highway system

South Dakota Highways

SD 19ASD 20A

South Dakota Highway 20 (SD 20) is a state route that largely runs from border to border across the northern part of the U.S. state of South Dakota that consists of two segments. The longer segment begins at the Montana border west of Camp Crook, and terminates at the junction of U.S. Route 212 (US 212) in Watertown. This segment is just less than 390 miles (630 km) in length. A second segment begins just west of an interchange with Interstate 29 (I-29) and US 81. It continues eastward to the Minnesota border east of Revillo, then becomes Minnesota State Highway 40 (MN 40). This second segment is just over 39 miles (63 km) in length, and the total length of the route is about 429 miles (690 km).

History

South Dakota 20 was implemented in 1929, but it was much shorter. The western terminus was at South Dakota Highway 45 northeast of Faulkton, and terminated in Watertown. Around 1944, the western terminus was moved further west, to U.S. Highway 83.

In the early 1950s, a short extension west was made again, to the town of Akaska. The eastern terminus was moved as well, to U.S. Highway 77 south of Milbank; the extension to the Minnesota border occurred in 1954.

In the late 1960s, the short stub between Akaska and U.S. 83 was redesignated as South Dakota Highway 20 Spur. SD 20 was extended northward along U.S. 83 to U.S. Highway 12, then through Mobridge and across north central and northwest South Dakota, absorbing the alignment of what had been South Dakota Highway 8.

Major intersections

CountyLocationmi[1][2][3]kmDestinationsNotes
Carter 0.0000.000Tie Creek RoadContinuation into Montana
HardingBuffalo26.13042.052 US 85 north BowmanNorthern end of US 85 concurrency
 27.65544.506 US 85 south Belle FourcheSouthern end of US 85 concurrency
 50.03080.515 SD 79 south NewellWestern end of SD 79 concurrency
 54.48387.682 SD 79 north ReederEastern end of SD 79 concurrency
Perkins 72.193116.183 SD 75 north Hettinger
 95.210153.226 SD 73 north LemmonNorthern end of SD 73 concurrency
 101.187162.845 SD 73 south FaithSouthern end of SD 73 concurrency
Ziebach 127.223204.746 SD 65 south DupreeWestern end of SD 65 concurrency
DeweyIsabel130.881210.633 SD 65 north McIntoshEastern end of SD 65 concurrency
 142.647229.568 SD 63 south Eagle ButteWestern end of SD 63 concurrency
 164.952265.465 SD 63 north McLaughlinEastern end of SD 63 concurrency
Corson 182.033292.954 US 12 west McLaughlinWestern end of US 12 concurrency
 185.095297.882 SD 1806 southWestern end of SD 1806 concurrency
 186.267299.768 SD 1806 north Fort Yates, NDEastern end of SD 1806 concurrency
WalworthMobridge190.508306.593 SD 1804 north PollockWestern end of SD 1804 concurrency
 194.386312.834 SD 1804 south AkaskaEastern end of SD 1804 concurrency
 208.759335.965 US 83 north Mound CityNorthern end of US 83 concurrency
Selby211.623340.574 SD 130 east Java
 215.876347.419 US 12 east Bowdle, AberdeenEastern end of US 12 concurrency
 224.663361.560 SD 144 west Akaska
 230.710371.292 US 83 south Agar, PierreSouthern end of US 83 concurrency
 243.723392.234 SD 47 northNorthern end of SD 47 concurrency
Potter 247.403398.157 SD 47 south LebanonSouthern end of SD 47 concurrency
Faulk 284.415457.722 SD 45 north IpswichNorthern end of SD 45 concurrency
 286.422460.952 SD 45 south MillerSouthern end of SD 45 concurrency
Spink 314.227505.699 US 281 Aberdeen, Redfield
Conde334.227537.886 SD 37 north Verdon, GrotonNorthern end of SD 37 concurrency
 334.236537.901 SD 37 south Turton, DolandSouthern end of SD 37 concurrency
Clark 362.337583.125 SD 25 Webster, DeSmet
CodingtonWatertown389.828627.367 US 212 Henry, Kranzburg
Gap in route
Codington 389.828627.367157th StreetBegin state maintenance
 392.017–
392.217
630.890–
631.212
I-29 / US 81 Fargo, BrookingsI-29 exit 193.
Grant 412.690664.160 SD 15 north / SD 158 east MilbankNorthern end of SD 15 concurrency
 419.712675.461 SD 15 south Clear LakeSouthern end of SD 15 concurrency
Lac qui Parle 428.852690.170 MN 40 east MariettaContinuation into Minnesota
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References

  1. 1 2 3 "State Highway Log: Rapid City Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 26, 2013.
  2. 1 2 3 "State Highway Log: Pierre Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 26, 2013.
  3. 1 2 3 4 "State Highway Log: Aberdeen Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 26, 2013.

External links

Route map: Bing / Google

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