Interstate 29 in South Dakota

(Redirected from I-29 (SD))

Interstate 29 (I-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 (406.4 km) in the state, the longest stretch of any of the four states through which it passes.[1] I-229, the highway's lone auxiliary route in South Dakota, serves as a bypass around southern and eastern Sioux Falls.

Interstate 29 marker
Interstate 29
Map
I-29 highlighted in red
Route information
Maintained by SDDOT
Length252.50 mi[1] (406.36 km)
NHSEntire route
Major junctions
South end I-29 at Iowa state line
Major intersections
North end I-29 / US 81 at North Dakota state line
Location
CountryUnited States
StateSouth Dakota
CountiesUnion, Lincoln, Minnehaha, Moody, Brookings, Deuel, Hamlin, Codington, Grant, Roberts
Highway system
  • South Dakota State Trunk Highway System
SD 28 SD 30

Route description

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The South Dakota section of I-29 is defined in South Dakota Consolidated Laws § 31-4-152.[2] All of I-29 in South Dakota is included in the National Highway System,[3] a system of highways important to the nation's defense, economy, and mobility.[4] Average daily traffic volume on I-29 in South Dakota is relatively low by Interstate Highway standards. Most segments of I-29 outside of Sioux Falls receive between 5,000 and 20,000 vehicles per day, with numbers as high as 50,000 being reported in Sioux Falls.[5]

The speed limit on I-29 in South Dakota is 80 mph (130 km/h) on most segments, but 65 mph (105 km/h) in Dakota Dunes and North Sioux City from the Iowa state line to exit 4, in Tea from exit 73 to exit 75, and in Sioux Falls from exit 75 to exit 84.

Sioux City to Sioux Falls

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An older version of the I-29 shield as used in South Dakota, still commonly seen along the route

I-29 crosses from Iowa into South Dakota at the Big Sioux River and enters the state in Union County. Exit 1, the highway's first exit in South Dakota, serves unincorporated Dakota Dunes. North Sioux City, the first city the highway enters in the state, can be accessed from exits 2 and 4. At exit 9 is the next community, Jefferson. Highway 105 (SD 105) formerly ran parallel to I-29, with southern terminus at exit 2 and northern terminus at exit 9. North of Jefferson, I-29 has a business loop in Elk Point. This business loop also serves the southern terminus of SD 11, a state route that runs parallel to I-29 through much of southern South Dakota. Farther north of Elk Point, the route runs northwest until its interchange with SD 50 at exit 26. This exit serves the cities of Vermillion and Yankton. After this exit, the highway curves north and heads for Beresford. Five miles (8.0 km) north at exit 31, the highway intersects SD 48. I-29 has one exit in Beresford, exit 47 serving SD 46, just after leaving Union County and entering Lincoln County. Beginning at exit 59, the highway runs concurrent with U.S. Route 18 (US 18). At exit 62, the concurrency with US 18 ends as US 18 branches to the east to serve Canton.[6]

North of Canton, I-29 begins to serve suburbs of Sioux Falls. Exit 71 serves Harrisburg and exit 73 serves Tea. Two miles (3.2 km) north of the Tea interchange, the Interstate enters Sioux Falls, the largest city in South Dakota. The highway has eight exits in Sioux Falls. The first exit in the city serves I-229, a short auxiliary route that circles through the southern and eastern portions of the city. Just north of this interchange, I-29 enters Minnehaha County, the most populous county in South Dakota. At exit 77, I-29 shares an interchange with 41st Street. A diverging-diamond interchange is to be constructed at this interchange, and will be completed in the summer of 2024.[7] At exit 79, the highway shares an interchange with SD 42, known as 12th Street. This exit, a single-point urban interchange, serves downtown Sioux Falls. Exit 81 serves Russell Street, which leads to the new Denny Sanford PREMIER Center and the Sioux Falls Arena. At exit 83, I-29 intersects SD 38, also known as 60th Street North, which serves the Sioux Falls Regional Airport. Just north of the Sioux Falls city limits at exits 84A and 84B, a cloverleaf interchange, I-29 reaches I-90, the only other two-digit Interstate in South Dakota. Exit 84A to I-90 east leads to the suburb of Brandon. Two miles (3.2 km) north of the interchange with I-90, the highway reaches exit 86, which serves Renner and Crooks, the two northernmost suburbs of Sioux Falls.[6]

Sioux Falls to North Dakota

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I-29 northbound in Sioux Falls

After leaving the Sioux Falls area, I-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, I-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, signed as "US 14B". After these exits, the highway continues north toward Watertown.[6]

Before leaving Brookings County and entering Deuel County, I-29 intersects SD 30. About 10 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 nine miles (14 km) east of Watertown. A past president of the Watertown Chamber of Commerce contacted Francis Case, a South Dakota Senator, in an effort to get I-29 routed closer to Watertown. The effort was successful; the westward alignment became known locally as the Case 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 (1.6 km) before its first exit in Codington County, which is exit 177, serving US 212 in the southeastern portion of Watertown.[6]

I-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 CodingtonGrant 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, I-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.[6]

Transit

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Jefferson Lines provides intercity bus service along the length of I-29 in South Dakota serving five communities along the route with a major transfer point at the Sioux Falls Bus Station.[8]

History

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No freeway was originally designated between Sioux Falls and Fargo, North Dakota. In 1957, the segment of I-29 from Fargo to the Canadian border was considered for designation as Interstate 31 (I-31).[9] However, in 1958, it was decided to connect the two Interstates between Sioux Falls and Fargo. The entire freeway from Kansas City, Missouri, to the Canadian border was then built and signed as I-29.[10]

A 19.5-mile (31.4 km) section between Worthing and SD 38 west of Sioux Falls was opened in October 1960.[11] In September 1961, I-29 was extended across the Big Sioux River from Iowa to South Dakota. On April 1, 1962, some of the northbound directional spans collapsed into the Big Sioux River at the Iowa state line as a result of flooding and bridge scour.[12][13][14] On September 30, 1962, an 84-mile (135 km) section of I-29 between Sioux City and Sioux Falls was dedicated and opened to traffic.[15]

By 1967, I-29 had been constructed from the Iowa border to the exit for SD 34.[16] I-229, an auxiliary route for the highway bypassing Sioux Falls, was completed in 1962.[17]

An additional interchange in Brookings was opened on August 24, 2023.[18]

Future

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By 2033, the South Dakota Department of Transportation (SDDOT) is planning to upgrade the interchange with I-229. SDDOT also plans to install an interchange with 85th Street in Sioux Falls, as well as a 69th Street overpass, turning a trumpet interchange into a redesigned tri-stack interchange.[19]

Exit list

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CountyLocationmi[20][21]kmExitDestinationsNotes
UnionBig Sioux Township0.000.00 
 
I-29 south – Sioux City
Continuation into Iowa
Dakota Dunes0.981.581Dakota DunesParclo interchange
North Sioux City2.483.992North Sioux CityFormerly SD 105
4.357.004North Sioux City, McCook Lake
Jefferson Township9.5015.299JeffersonFormerly SD 105
Elk Point Township15.7825.4015 
 
I-29 BL north – Elk Point
I-29 BL only marked northbound
18.3029.4518 
 
I-29 BL south – Elk Point, Burbank
Parclo interchange, I-29 BL only marked southbound
Brule Township26.7042.9726  SD 50 – Vermillion, YanktonAlso access to University of South Dakota
Spink Township31.2750.3231 
 
SD 48 east – Spink, Akron IA
Also access to Union Grove State Park
Emmet Township38.3261.6738Volin
Prairie Township42.3168.0942Alcester, Wakonda
LincolnBeresford47.3076.1247  SD 46 – Beresford, Irene
Pleasant Township50.3180.9750Centerville, Hudson
PleasantLincoln
township line
53.3285.8153Viborg
Lincoln Township56.3390.6556FairviewAlso access to Newton Hills State Park
LincolnLynn
township line
59.3395.4859 
 
US 18 west – Davis, Hurley
Southern end of US 18 concurrency
Lynn Township62.35100.3462 
 
US 18 east – Canton
Northern end of US 18 concurrency
64.33103.5364  SD 44 – Worthing, Lennox
La Valley Township68.35110.0068Lennox, Parker
Tea71.36114.8471Harrisburg, Tea
73.38118.0973  CR 106 – TeaSingle-point urban interchange (SPUI)
Sioux Falls74.38119.707485th StreetFuture diverging diamond interchange; to begin construction in 2025
75.19121.0175 
 
I-229 north – Sioux Falls
Trumpet interchange; I-229 exits 1A-B southbound.
Minnehaha77.26124.347741st StreetDiverging diamond interchange; Also access to Augustana University, University of Sioux Falls
78.12125.727826th Street / Louise Avenue
79.26127.5679 
 
   I-29 Dwtn. east / SD 42 (12th Street) – Downtown
SPUI; Also access to Great Plains Zoo, USS South Dakota Battleship Memorial, Washington Pavilion of Arts and Science
80.29129.2180Madison Street – Sioux Empire FairgroundsSPUI
81.32130.8781Russell Street / Maple Street – Denny Sanford PREMIER Center, Sioux Falls Arena and Convention CenterParclo interchange having three northbound entrances: two from Russell St., one from Maple St; Also access to Sioux Falls Bus Station
82.41132.6382Benson Road – Sioux Falls, Sanford Pentagon/Sports ComplexSPUI
83.38134.1983 
 
  SD 38 west (60th Street North) – Sioux Falls Regional Airport
Parclo interchange
Mapleton Township84.15135.4384  I-90 – Albert Lea, Rapid CitySigned as exits 84A (east, Albert Lea) and 84B (west, Rapid City); cloverleaf interchange; I-90 exits 396A-B
86.40139.0586Renner, Crooks
LyonsBurk
township line
94.49152.0794Baltic, Colton, Lyons, US Geological Survey/EROSColton only signed northbound
Burk Township98.47158.4798 
 
SD 115 south – Dell Rapids, Chester, Colton
SD 115 and Colton only signed southbound, Chester only signed northbound
MoodyEnterprise Township104.81168.68104Trent, ChesterChester only signed southbound
Egan Township109.83176.75109  SD 34 – Madison, ColmanAlso access to Dakota State University, Lake Herman State Park
Clare Township114.82184.78114 
 
SD 32 east – Flandreau
Riverview Township121.83196.07121Nunda, Ward
BrookingsTrenton Township127.80205.67127 
 
SD 324 east – Elkton, Sinai
Western terminus of SD 324
Brookings130.79210.4913020th Street South, BrookingsOpened August 24, 2023;[22][18] Brookings only signed northbound
132.79213.70132 
 
   I-29 BS west / US 14 (6th Street) – Brookings, Huron
Eastern terminus of I-29 Business Spur; Also access to South Dakota State University, Municipal Airport; 6th Street only signed southbound
133.78215.30133 
 
US 14 Byp. (18th Street) – Volga, Arlington
Also access to South Dakota State University, De Smet-Home of Laura Ingalls Wilder; 18th Street only signed northbound
Afton Township140.77226.55140  SD 30 – White, BruceAlso access to Oakwood Lakes State Park
DeuelBlom Township150.87242.80150 
 
  SD 15 north / SD 28 – Toronto, Estelline
SD 15 only signed northbound
Hidewood Township157.63253.68157Brandt
Havana Township164.53264.79164   SD 22 – Castlewood, Clear Lake
Hamlin
No major junctions
CodingtonWatertown177.93286.35177   US 212 – Watertown, KranzburgAlso access to Redlin Art Center, Lake Area Technical Institute, Mount Marty University-Watertown Campus, Sandy Shore Recreation Area, Pelican Lake Recreation Area
Elmira Township180.94291.19180 
 
  US 81 south – Watertown
Southern end of US 81 concurrency; Also access to Bramble Park Zoo, Municipal Airport, US 81 only signed southbound
Rauville Township185.95299.26185Waverly
Germantown Township193.02310.64193  SD 20 – South Shore, Stockholm
GrantFarmington Township201.05323.56201Twin Brooks
RobertsSummit Township207.29333.60207  US 12 – Aberdeen, MilbankAlso access to Northern State University, Summit, Webster, Blue Dog State Fish Hatchery, Waubay National Wildlife Refuge
Spring Grove Township213.87344.19213  SD 15 – WilmotAlso access to Hartford Beach State Park
Agency Township224.02360.53224PeeverAlso access to Sisseton-Wahpeton Oyate Tribal Headquarters and Community College, Pickerel Lake Recreation Area
Grant Township232.07373.48232   SD 10 – Sisseton, Browns ValleyAlso access to Roy Lake State Park, Fort Sisseton State Park
Hart Township242.02389.49242No name exit
Lien Township246.42396.57246  SD 127 – New Effington, RosholtAlso access to Sica Hollow State Park
Victor Township252.50406.36 
 
 
 
I-29 north / US 81 north – Fargo
Continuation into North Dakota
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

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  1. ^ a b "Main Routes of the Eisenhower National System of Interstate and Defense Highways". Federal Highway Administration. Retrieved October 28, 2012.
  2. ^ "South Dakota Codified Laws - § 31-4-152". South Dakota Legislature. Retrieved June 25, 2008.
  3. ^ "National Highway System Map: South Dakota" (PDF). Federal Highway Administration. Retrieved October 28, 2012.
  4. ^ "The National Highway System". Federal Highway Administration. Retrieved October 28, 2012.
  5. ^ "2011 Traffic Map" (PDF). South Dakota Department of Transportation. Retrieved October 28, 2012.
  6. ^ a b c d e "Google Maps Overview of Interstate 29". Retrieved October 28, 2012.
  7. ^ "41st Street Diverging Diamond Interchange". siouxfalls.org. Retrieved May 24, 2022.
  8. ^ "South Dakota Route Map" (PDF). Retrieved September 29, 2023.
  9. ^ Public Roads Administration; American Association of State Highway Officials (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways, As Adopted by the American Association of State Highway Officials (Map). Scale not given. Washington, DC: Public Roads Administration – via Wikimedia Commons.
  10. ^ Public Roads Administration; American Association of State Highway Officials (June 27, 1958). Official Route Numbering for the National System of Interstate and Defense Highways, As Adopted by the American Association of State Highway Officials (Map). Scale not given. Washington, DC: Public Roads Administration – via Wikimedia Commons.
  11. ^ "$8½ Million Highway to Open in S.F. Area". Sioux Falls Argus-Leader. October 11, 1960. p. 1. Retrieved December 21, 2021 – via Newspapers.com.
  12. ^ "Rain, storms follow weekend of storms; stir fears of floods". Lodi News-Sentinel. United Press International. April 2, 1962. p. 5. Retrieved January 29, 2015.
  13. ^ "I-29 bridge collapse". Sioux City Journal. April 22, 2012. Retrieved January 29, 2015.
  14. ^ Richardson, E. V.; Lagasse, P. F. (1999). Stream Stability and Scour at Highway Bridges. American Society of Civil Engineers. p. 57. ISBN 9780784474655. Retrieved January 29, 2015.
  15. ^ Gilbride, F. J. (October 1, 1962). "Event Marks Completion Of Interstate Highway". Argus Leader. Sioux Falls, South Dakota. p. 5. Retrieved January 20, 2018 – via Newspapers.com.
  16. ^ "North Central 1967". Gousha. Retrieved November 4, 2012.
  17. ^ "S.F. Interstate Bypass Completed". Argus Leader. October 30, 1962. p. 1. Retrieved September 13, 2021 – via Newspapers.com.
  18. ^ a b Kubal, Jones (August 24, 2023). "New interchange on Interstate 29 opens third route into Brookings". Brookings Register. Retrieved August 30, 2023.
  19. ^ "I-29 Corridor Study" (PDF). South Dakota Department of Transportation. Exit 73 through Exit 77. Retrieved October 29, 2012.
  20. ^ State Highway Log: Mitchell Region (PDF). South Dakota Department of Transportation. Retrieved October 28, 2012.
  21. ^ State Highway Log: Aberdeen Region (PDF). South Dakota Department of Transportation. Retrieved October 28, 2012.
  22. ^ Newton, Jacob (March 28, 2022). "New Brookings I-29 interchange construction begins". Sioux Falls, South Dakota: KELO-TV. Retrieved April 7, 2022.
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  Interstate 29
Previous state:
Iowa
South Dakota Next state:
North Dakota