South Dakota Highway 37

Highway 37
Highway 37
	Route of SD 37 (in red)
Route information
	Maintained by SDDOT
Length	242 mi (389 km)
Existed	1926–present
Major junctions
South end	N-14 at the Nebraska border
North end	ND 1 at the North Dakota border
Location
Country	United States
State	South Dakota
Counties	Bon Homme, Hutchinson, Davison, Sanborn, Beadle, Spink, Brown
Highway system
	South Dakota State Trunk Highway System; Interstate; US; State;

South Dakota Highway 37 (SD 37) is a state route that runs across eastern South Dakota. It begins at the Nebraska border northeast of Niobrara, Nebraska, as a continuation of Nebraska Highway 14. It runs to the North Dakota border north of Hecla, where it continues as North Dakota Highway 1. It is 242 miles (389 km) in length.

History

South Dakota 37 was in place by 1926, and largely has used the same alignment since. The only significant exception was in northeast South Dakota, where SD 37 originally went westward from Groton to Bath, then north via Columbia to Houghton, where it continued to Hecla. This segment was rerouted to the current alignment by 1929.

On the south end, the road ended at the Missouri River at Running Water. A seasonal ferry was in place to carry traffic across the river. A direct connection via bridge did not open until 1998 when the Chief Standing Bear Memorial Bridge was completed.

In the early and mid-1930s, the segment between Huron and Tripp was co-numbered as U.S. Route 281. This concurrency was dropped by 1936, when US 281 was realigned further west.

The segment between Huron and Mitchell was upgraded to a 4-lane expressway, and was largely completed by 2004. A minor rerouting around the west end of Mitchell occurred, resulting in a 2-mile (3.2 km) concurrency with Interstate 90.

Legal definition

The route of SD 37 is defined in South Dakota Codified Laws § 31-4-158.^[1]

Major intersections

County	Location	Destinations	Notes
Bon Homme		SD 52 east – Yankton	Western terminus of SD 52
		SD 50 east – Tyndall	East end of SD 50 concurrency
		SD 50 west – Avon	West end of SD 50 concurrency
		SD 46 – Wagner
Hutchinson		SD 37A – Tripp
		US 18 – Canton
	Parkston	SD 44 – Platte
Davison		SD 42 – Ethan
	Mitchell	I-90 east / I-90 BL – Sioux Falls	East end of I-90 concurrency, exit 332; I-90 Bus. is a continuation north of the I-90 interchange.
		I-90 west / I-90 BL – Rapid City	West end of I-90 concurrency, exit 330; south end of I-90 Bus. concurrency.
		I-90 BL	North end of I-90 Bus. concurrency
Sanborn		SD 34 east – Artesian	East end of SD 34 concurrency
		SD 34 west – Woonsocket	West end of SD 34 concurrency
		SD 224 west – Alpena	Western terminus of SD 224
Beadle	Huron	US 14 – Pierre, DeSmet
Beadle–Spink county line		SD 28 – Hitchcock
Spink		US 212 west – Redfield	West end of US 212 concurrency
	Doland	US 212 east – Clark	East end of US 212 concurrency
		SD 20 east – Watertown	South end of SD 20 concurrency
	Conde	SD 20 west – Brentford	North end of SD 20 concurrency
Brown	Groton	US 12 – Aberdeen, Webster
		SD 10 east – Britton	East end of SD 10 concurrency
		SD 10 west – Leola	West end of SD 10 concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus