page_title: Interstate 29 in South Dakota
section_title: Sioux Falls to North Dakota
hierarchical_section_title: Interstate 29 in South Dakota / Route description / Sioux Falls to North Dakota
caption_attribution_description: English: Interstate 29 northbound from the 49th Street overpass in Sioux Falls, South Dakota
context_page_description: Interstate 29 is a north–south Interstate Highway in the midwestern United States. In the state of South Dakota, I-29 traverses on the eastern side of the state from the Iowa border near Sioux City to the North Dakota border near New Effington. On its route, I-29 passes through western portions of Sioux Falls, the state's largest city. It travels 252.5 miles in the state, the longest stretch of any of the four states through which it passes. Interstate 229, the highway's lone auxiliary route in South Dakota, serves as a bypass around southern and eastern Sioux Falls.
context_section_description: After leaving the Sioux Falls area, Interstate 29 continues north toward Brookings. The highway serves the EROS Data Center and United States Geological Survey near Baltic. The highway then continues north and intersects the northern terminus of SD 115 west of Dell Rapids. This is I-29's last exit before leaving Minnehaha County and entering Moody County. The highway continues due north to an interchange with SD 34 near Madison. Just five miles (8.0 km) north of here, the route shares an interchange with SD 32, a highway that serves nearby Flandreau, South Dakota. The highway has a rest stop north of the Flandreau exit before entering Brookings County. The highway's first exit in Brookings County, serves SD 324. After this interchange, Interstate 29 enters Brookings and has two exits in the city. The first is an interchange with US 14 at exit 132. This exit is also a signed business spur of I-29. Exit 133 serves the bypass route of US 14. This exit is signed on the northbound route as "US 14B." After these exits, the highway continues north toward Watertown.
  Before leaving Brookings County and entering Deuel County, Interstate 29 intersects the western terminus of SD 30. About ten miles (16 km) north of here, the highway serves SD 28. After this interchange, the highway turns northwest en route to Watertown. Early planning of this segment of I-29 had the route passing just east of Kranzburg, or about 9 miles east of Watertown. A past president of the Watertown Chamber of Commerce contacted C.L. Chase, a member of the Democratic National Committee, in an effort to get I-29 routed closer to Watertown. The effort was successful; the westward alignment became known locally as the Chase Bend. East of Castlewood, I-29 intersects SD 22 before entering Hamlin County. The highway has no exits in Hamlin County, as it travels for only five miles (8.0 km) in the county, merely passing through the northeast corner of it before entering Codington County. The highway curves to the north one mile before its first exit in Codington County, which is exit 177, serving US 212 in the southeastern portion of Watertown.
  Interstate 29 intersects US 81 at exit 180, just northeast of Watertown, and the two routes become concurrent all the way to Manvel, North Dakota. Near the Codington-Grant county line, I-29 intersects SD 20. The highway has one exit in Grant County for Twin Brooks, though this road is not a signed highway. Entering Roberts County, I-29 has an interchange at Summit with US 12, for access to Aberdeen, and Milbank. The highway heads northeast after this interchange. West of Wilmot, the highway intersects SD 15. Shortly after this exit, the highway turns to the north again. Just east of Sisseton, I-29 has an interchange with SD 10, then curves northeast. Near the small town of New Effington, the highway curves north and has its last exit in South Dakota at exit 246. This exit serves SD 127. North of this final exit, Interstate 29 turns northeast and enters Richland County, North Dakota next to the Dakota Magic Casino and Hotel resort.  At the state border is a parclo interchange entirely on the North Dakota side serving the casino/hotel.
caption: I-29 northbound in Sioux Falls
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