South Dakota Highway 50 (SD 50) is a state route serving south central and southeast
South Dakota
South Dakota (; Sioux language, Sioux: , ) is a U.S. state in the West North Central states, North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Lakota people, Lakota and Dakota peo ...
. The current alignment begins at the junction of
South Dakota Highway 34
South Dakota Highway 34 (SD 34) is a state route that runs parallel to Interstate 90 across the entire state of South Dakota. It begins at the Wyoming border west of Belle Fourche, as a continuation of Wyoming Highway 24 (WYO 24). The easte ...
at "Lee's Corner" east of
Fort Thompson, and ends at the
Iowa
Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...
border near
Richland, where it continues as
Iowa Highway 3
Iowa Highway 3 (Iowa 3) is a state highway that runs from east to west across the state of Iowa. It is the longest state highway in Iowa, at long. Iowa 3 begins at the South Dakota state line where it continues as South Dakota Highwa ...
. It is about in length.
History
SD 50 was designated on the route known as the Sunshine Highway. When it was formed in the 1920s, it traveled the entire length of southern South Dakota, from the
Wyoming
Wyoming () is a U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the south ...
state line west of
Edgemont, to the Iowa state line at
Sioux City
Sioux City () is a city in Woodbury and Plymouth counties in the northwestern part of the U.S. state of Iowa. The population was 85,797 in the 2020 census, making it the fourth-largest city in Iowa. The bulk of the city is in Woodbury County, ...
.
When
U.S. Route 18 (US 18) was designated in the late 1920s, it replaced the SD 50 designation from the Wyoming state line at Ravinia (east of
Lake Andes). SD 50 continued in southeast South Dakota.
Around 1940, SD 50 was extended northwest of its former terminus. It assumed a portion of alignment of
SD 45 through
Geddes, and
SD 47 through Academy; the northern terminus became
US 16 near
Pukwana.
Around 1950, the eastern terminus was rerouted. At
US 77 (with which it had previously shared a concurrency to Sioux City), SD 50 was extended east to the Iowa state line.
In 1975, the northwestern terminus was again extended. It was routed west to
Chamberlain
Chamberlain may refer to:
Profession
*Chamberlain (office), the officer in charge of managing the household of a sovereign or other noble figure
People
*Chamberlain (surname)
**Houston Stewart Chamberlain (1855–1927), German-British philosop ...
, then assumed a segment of SD 47 (which had been realigned west) to its new northern terminus at SD 34 east of Fort Thompson.
[ ]
Major intersections
References
External links
{{Attached KML, display=title,inline
South Dakota Highways Page: Highways 31-60
050
Transportation in Buffalo County, South Dakota
Transportation in Brule County, South Dakota
Transportation in Charles Mix County, South Dakota
Transportation in Bon Homme County, South Dakota
Transportation in Yankton County, South Dakota
Transportation in Clay County, South Dakota
Transportation in Union County, South Dakota
U.S. Route 18
U.S. Route 16