South Dakota Highway 42

South Dakota Highway 42 (SD 42) is a segmented state highway in southeastern South Dakota, United States. The first segment is a six-mile-long (9.7 km) highway in Aurora County. The second and longest is 60 miles (97 km) long and connects Ethan and Sioux Falls. The final segment connects Sioux Falls to Iowa Highway 9 southeast of Rowena.

Highway 42
Route of SD 42 (in red)
Route information
Defined by SDCL §31-4-162
Maintained by SDDOT
Length71.973 mi[1] (115.829 km)
Western segment
Length5.870 mi (9.447 km)
West end US 281 in Aurora County
East endAurora–Davison county line
Central segment
Length59.231 mi (95.323 km)
West end SD 37 west of Ethan
Major
junctions		 US 81 in McCook County
East endSioux Falls
Eastern segment
Length6.872 mi (11.059 km)
West end SD 11 in Sioux Falls
East end Iowa 9 west of Benclare
Location
Counties
Highway system
  • South Dakota Highways
← SD 41SD 43 →

Route description

The westernmost segment of SD 42 begins at a junction with U.S. Route 281 (US 281) and travels east through open farmland. This is the shortest of the three segments; it is only about six miles (9.7 km) long, and it ends as the roadway crosses from Aurora County into Davison County.[2]

The central segment of the highway begins at an intersection with SD 37 in rural Davison County. It heads east and crosses the BNSF Railway.[3] Just east of the railroad, the route passes through the town of Ethan, then enters Hanson County. About six miles (9.7 km) farther east, SD 42 bends slightly to the south and crosses the James River. The highway continues east through the flat prairie and enters McCook County.

SD 42 in western Sioux Falls, February 2013

About five miles (8.0 km) east of the county line, the highway enters the city of Bridgewater. Here, it curves to the northeast and crosses another branch of the BNSF Railway[3] before meeting the eastern terminus of SD 262. SD 42 then curves back to the east and leaves Bridgewater. It continues through flat farmland, intersecting US 81 and passing over the west fork of the Vermillion River. The route heads east about ten miles (16 km) before crossing the east fork of the Vermillion River, and then entering Minnehaha County.

In Minnehaha County, SD 42 intersects SD 19, and the two highways run east for about one mile (1.6 km) before SD 19 splits off to the north, and SD 42 continues east toward Sioux Falls. It intersects the northern terminus of SD 17 approximately three miles (4.8 km) west of the city. The central segment of SD 42 ends at Ellis Road near the Sioux Falls city limits.[4]

The easternmost segment of SD 42 begins at Six Mile Road east of the city of Sioux Falls. It runs southeast, concurrent with SD 11 along Arrowhead Parkway. The two highways pass by a golf course and a park before crossing the Big Sioux River. East of the river, SD 11 turns to the north toward Brandon, and SD 42 curves to the east. The highway passes through the unincorporated community of Rowena before curving due south and crossing the Iowa state line. The route continues into Iowa as Iowa Highway 9.[5]

Major intersections
CountyLocationmi[1]kmDestinationsNotes
Aurora​0.0000.000 US 281 (388th Avenue) – StickneyRoad continues as 265th Street
Aurora–Davison
county line		​5.8709.447394th AvenueEastern end of state maintenance; road continues as 265th Street
Gap in route
DavisonEthan5.8709.447 SD 37 (410th Avenue) – Parkston, MitchellWestern end of state maintenance; SDDOT signs this as western terminus; road continues as 265th Street
Hanson
 No major junctions
McCookBridgewater31.81151.195 SD 262 west – Bridgewater
​37.10059.707 US 81 (441st Avenue) – I-90, Freeman, Salem
Minnehaha​51.08982.220 SD 19 south (455th Avenue) – ParkerWestern end of SD 19 concurrency
​52.10283.850 SD 19 north (456th Avenue) – HumboldtEastern end of SD 19 concurrency
​62.10199.942 SD 17 south (466th Avenue) – Lennox
​65.101104.770 CR 139 (Ellis Road) – Ellis, TeaEastern end of state maintenance
Gap in route
​65.101104.770 CR 119 (Six Mile Road)Western end of state maintenance
​67.334108.364 SD 11 north (481st Avenue) – BrandonEastern end of SD 11 concurrency
​71.973115.829 Iowa 9 east / CR A10Iowa state line; road continues as Iowa 9
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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See also

References
  1. "State Highway Log" (PDF). Mitchell region: South Dakota Department of Transportation. January 2011. pp. 100–104. Retrieved December 21, 2011.
  2. Google (December 20, 2013). "Western segment of SD 42" (Map). Google Maps. Google. Retrieved December 20, 2013.
  3. "Official South Dakota Rail Map" (PDF). South Dakota Department of Transportation. October 2009. Retrieved December 20, 2013.
  4. Google (December 20, 2013). "Central segment of SD 42" (Map). Google Maps. Google. Retrieved December 20, 2013.
  5. Google (December 20, 2013). "Eastern segment of SD 42" (Map). Google Maps. Google. Retrieved December 20, 2013.

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