South Dakota Highway 48

South Dakota Highway 48 (SD 48) is a 12.462-mile (20.056 km) state highway in Union County, South Dakota, United States, that begins at Interstate 29, about 2.5 miles (4.0 km) west of Spink, and becomes Big Sioux River Road,[2] formerly Iowa Highway 403, northwest of Akron, Iowa.

Highway 48 marker

Highway 48

Route of SD 48 (in red)
Route information
Maintained by SDDOT
Length12.462 mi[1] (20.056 km)
ExistedCirca 1950–present
Major junctions
West end I-29 east of Spink
East endIowa state line west of Akron, Ia.
Location
CountryUnited States
StateSouth Dakota
Highway system
  • South Dakota State Trunk Highway System
← SD 47W→ SD 49

Route description

SD 48 begins at a diamond interchange on I‑29 Exit 31, approximately 44 miles (71 km) south of Sioux Falls.[3] From its western terminus,[4] SD 48 travels due east. It nearly immediately meets County Road 1C (CR 1C), an old alignment of US 77. Two miles (3.2 km) east of the CR 1C intersection, SD 48 passes through the town of Spink.[4]

East of Spink, SD 48 gently curves to the north as it descends a rolling hill towards Brule Creek. After crossing the stream, the highway ascends, bending back to the south to resume its due east course. Over the next several miles, the road remains arrow-straight while traversing gently rolling farmland. Just under 10 miles (16 km) east of I‑29, SD 48 serves as the southern terminus of Highway 11 (SD 11). About 1⁄3 mile (0.54 km) from the SD 11 junction, SD 48 crosses a bridge over West Union Creek;[5] one mile (1.6 km) later, it crosses East Union Creek.[6][1] For the remainder of the route, the road gradually S-curves southwest into the Big Sioux River valley. At the Big Sioux River, the road crosses the Iowa state line and ends.

History

South Dakota 48 was established on a previously unnumbered highway between 1948 and 1953.[7] It began at U.S. Highway 77 (current Union County Road 1C). No significant changes have been made, except for a slight extension to meet Interstate 29 to the west, and a slight realignment at the Iowa border.

Major intersections

The entire route is in Union County.

Locationmi[1]kmDestinationsNotes
​0.0000.000 I-29I-29 exit 31
​9.89115.918 SD 11
Big Sioux River12.46220.056South Dakota–Iowa state line

 Big Sioux River Road to Iowa 12		Continuation into Iowa
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References
  1. South Dakota Department of Transportation (January 2009). "State Highway Log, Mitchell Region" (PDF). Retrieved 2009-12-03.
  2. Highway and Street Map of Akron Iowa Archived 2006-05-05 at the Wayback Machine
  3. South Dakota Department of Transportation. "Transportation Inventory Management". Retrieved 2009-12-03.
  4. Google (2009-12-03). "South Dakota Highway 48" (Map). Google Maps. Google. Retrieved 2009-12-03.
  5. U.S. Geological Survey Geographic Names Information System: West Union Creek
  6. U.S. Geological Survey Geographic Names Information System: East Union Creek
  7. "South Dakota Highways Page: Highways 31-60".
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