South Dakota Highway 45

Highway 45
Highway 45
	Map SD 45
Route information
	Defined by SDCL §31-4-165
	Maintained by SDDOT
Length	198 mi (319 km)
Existed	1927–present
Major junctions
South end	SD 44 / SD 50 in Platte
	I-90 in Kimball; US 14 in Miller; US 212 near Faulkton; US 12 in Ipswich;
North end	ND 3 near Ashley
Location
Country	United States
State	South Dakota
Counties	Charles Mix; Brule; Buffalo; Hand; Faulk; Edmunds; McPherson;
Highway system
	South Dakota State Trunk Highway System; Interstate; US; State;

South Dakota Highway 45 is a state highway that runs north to south across much of central South Dakota, United States. The northern terminus is at the North Dakota border as a continuation of North Dakota Highway 3, and runs south to South Dakota Highway 44 at Platte. It is 198 miles (319 km) in length.

History

SD 45 was established around 1927. The southern terminus was at the intersection of present-day SD 50 and County Road 49 (CR 49) and the northern terminus was at the intersection of SD 10 in Leola.

By 1932, it was extended south along what was part of SD 47 to Wheeler. By 1936, SD 45 was truncated at Kimball, at US 16, as US 281 supplanted the SD 45 designation to the south. In the early 1950s, when US 281 was relocated several miles to the east, SD 45 was extended back south to SD 50.

Around 1970, SD 50 had been realigned to intersect SD 44 west of Platte, and SD 45 was extended south along the old alignment to Platte, where it remains today.

The north end of the route has remained in its current configuration since 1936.

Major intersections

County	Location	Destinations	Notes
Charles Mix	Platte	SD 44 / SD 50 – Winner	Southern terminus
Brule		I-90 east – Mitchell	Eastern end of I-90 concurrency, Exit 289.
Brule	Kimball	I-90 west – Rapid City	Western end of I-90 concurrency, Exit 284.
Buffalo		SD 34 – Wessington Springs
Hand	Miller	US 14 east – St. Lawrence	Southern end of US 14 concurrency
	Miller	US 14 west – Pierre	Northern end of US 14 concurrency
		SD 26 east	Southern end of SD 26 concurrency
		SD 26 west	Northern end of SD 26 concurrency
Hand–Faulk county line		US 212 east – Redfield	Southern end of US 212 concurrency
Faulk		US 212 west – Faulkton	Northern end of US 212 concurrency
		SD 20 east – Northville	Southern end of SD 20 concurrency
		SD 20 west – Onaka	Northern end of SD 20 concurrency
Edmunds	Ipswich	US 12 west – Roscoe	Western end of US 12 concurrency
Edmunds		US 12 east – Aberdeen	Eastern end of US 12 concurrency
McPherson	Leola	SD 10 east – Britton	Eastern end of SD 10 concurrency
		SD 239 north – Long Lake
		SD 10 west / SD 247 south	Northern terminus; western end of SD 10 concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus