Interstate 90 in South Dakota
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Purple Heart Memorial Highway | ||||
I-90 highlighted in red | ||||
Route information | ||||
Maintained by SDDOT | ||||
Length | 412.76 mi[1] (664.27 km) | |||
Major junctions | ||||
West end | ![]() ![]() | |||
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East end | ![]() | |||
Location | ||||
Counties | Lawrence, Meade, Pennington, Jackson, Jones, Lyman, Brule, Aurora, Davison, Hanson, McCook, Minnehaha | |||
Highway system | ||||
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In the U.S. state of South Dakota, Interstate 90 (I-90) traverses east–west through the southern half of the state.
Route description[]
Interstate 90 enters South Dakota in Lawrence County as a four-lane divided highway. It enters concurrently with U.S. Route 14, and passes through the town of Spearfish, where it shares another concurrency with U.S. Route 85 from exit 10 to exit 17. From there it passes several miles north and east of the tourist town of Deadwood before entering Meade County, going just to the west of Sturgis. Another concurrency is with South Dakota Highway 34 from exit 23 at Whitewood to exit 30, the west exit of Sturgis, where there starts a concurrency with SD 79. The freeway generally passes along the north and east edges of the Black Hills.
The route then enters Pennington County, where it passes through the northern edge of Rapid City, gateway to the Black Hills and the nearest passing to Mount Rushmore National Memorial, as well as other scenic attractions including Custer State Park and the Needles Highway. Rapid City is also where the interstate has its westernmost auxiliary route, Interstate 190, which links the interstate to the western edge of the downtown area. SD 79's concurrency ends at exit 61 on the east side of the city. From Rapid City, the route heads east, passing between Box Elder to the south and Ellsworth Air Force Base to the north before heading towards Wall on to Jackson County. Exits 110 and 131 for Badlands National Park to the south (SD 240) are within 15 miles (24 km) either way of the county line. The concurrency for US-14 ends at exit 112 just east of Wall; here US-14 runs due east and will connect to the city of Philip and the capital city of Pierre.
From there, the route passes mostly east–west through Jackson and Jones counties. There are short concurrencies with SD 73 (from the west entering Kadoka) and SD 63 in Jackson County. Interstate 90 crosses the Central Time/Mountain Time Zone boundary on the west edge of Jones County. Then at Murdo, a concurrency begins with U.S. Route 83 at exit 192 and continues to exit 212. It is in Lyman County, at exit 212 in Vivian, that the highway provides its closest link to the capital of Pierre, along US-83, some 35 miles (56 km) north. The road crosses the Missouri River at Lake Francis Case, between the towns of Oacoma and Chamberlain, also crossing into Brule County. I-90 Business Loop runs from exit 260 at Oacoma to downtown Chamberlain across the Missouri River on the nearby Chamberlain Bridge, and returns to I-90 at exit 265. Beginning there is a short concurrency with SD 50 heading to Pukwana, and also in Brule County is another short concurrency with SD 45 starting at Kimball.
I-90 then continues through Aurora County (connecting to White Lake and Plankinton), Davison County (where Mt. Vernon, Mitchell and the Corn Palace are located), Hanson County (Alexandria), and McCook County (Salem). Then comes the state's most populous county, Minnehaha. After passing the communities of Humboldt and Hartford, the interstate intersects the only other major interstate in the state, Interstate 29, at Sioux Falls, the largest city. Just east of Interstate 29 is where Interstate 90 meets the northern terminus of Interstate 229. East of Brandon and northeast of Valley Springs, it then ends its trip through South Dakota of 412 miles (663 km) before entering Minnesota and Rock County, just west of the towns of Beaver Creek and Manley.
Since April 2015 the speed limit is 80 miles per hour (130 km/h), except it is 65 miles per hour (105 km/h) between I-229 and Marion Road in Sioux Falls; and through Rapid City. The speed limit remains 75 miles per hour (121 km/h) between Rapid City and the Wyoming state line.
Codified law[]
The South Dakota section of I-90 is defined at South Dakota Codified Laws § 31-4-184.[2]
History[]
I-90 was constructed in the 1970s. The four-lane interstate replaced old highway 16 as the main road connecting Rapid City and Sioux Falls. Much of Old 16 remains intact, however I-90 has absorbed sections and likewise has reshaped the economies of many southern South Dakota towns.[3] The final section of I-90 in the state opened in November 1976 between the Wyoming state line and Spearfish.[4]
On May 24, 2012, the South Dakota Transportation Commission declared the entire length of I-90 as part of the National Purple Heart Trail, naming it the Purple Heart Memorial Highway.[5]
Removal of exit 66[]
In the city of Box Elder, exit 66, which crossed South Dakota Highway 435, was closed on October 1, 2003, after a 10-month delay.[6] The exit was closed and removed as a result of the department of transportation's efforts to move traffic away from a potential crash site at the end of the Ellsworth AFB runway. The partial cloverleaf interchange of exit 66 was also demolished shortly thereafter. Exit 67, which was constructed not too long before the closure of exit 66, is now used as the main entrance and exit feeder to the base, and it is less likely to be impacted by a potential crash.[7] Local citizens and officials feared the lack of entrances which access the Ellsworth Air Force Base would cause traffic issues, and moving businesses from near the old exit would cause some to close and affect tax revenue. Land near exit 66 began to be purchased in 2004, including the former McDonald's property.[8]
Exit list[]
County | Location | mi[9] | km | Exit | Destinations | Notes |
---|---|---|---|---|---|---|
Lawrence | | 0.00 | 0.00 | ![]() ![]() | Continuation into Wyoming | |
| 2.25 | 3.62 | 2 | McNenny State Fish Hatchery | ||
Spearfish | 8.96 | 14.42 | 8 | McGuigan Road – Spearfish, Black Hills National Forest | ||
10.26 | 16.51 | 10 | ![]() ![]() | Western end of US 85 concurrency | ||
12.32 | 19.83 | 12 | Jackson Boulevard – Spearfish, Black Hills State University | |||
14.42 | 23.21 | 14 | ![]() ![]() | |||
| 18.16 | 29.23 | 17 | ![]() | Eastern end of US 85 concurrency | |
Whitewood | 23.73 | 38.19 | 23 | ![]() | Western end of SD 34 concurrency | |
Meade | Sturgis | 30.28 | 48.73 | 30 | ![]() ![]() ![]() ![]() | Eastern end of SD 34 concurrency; western end of SD 79 concurrency |
32.41 | 52.16 | 32 | ![]() ![]() | Serves Sturgis Regional Hospital | ||
| 34.81 | 56.02 | 34 | Black Hills National Cemetery | ||
| 37.01 | 59.56 | 37 | Pleasant Valley Road | ||
Tilford | 40.20 | 64.70 | 40 | Tilford Road, Bethlehem Road – Tilford | ||
Piedmont | 44.66 | 71.87 | 44 | Bethlehem Road – Piedmont | ||
46.14 | 74.26 | 46 | Elk Creek Road – Piedmont, Summerset | |||
Summerset | 48.43 | 77.94 | 48 | Stagebarn Canyon Road – Summerset | ||
Black Hawk | 52.38 | 84.30 | 52 | ![]() | ||
Pennington | Rapid City | 55.66 | 89.58 | 55 | Deadwood Avenue – Rapid City | |
57.76 | 92.96 | 57 | ![]() ![]() | Trumpet interchange; I-190 exits 1A–B | ||
58.31 | 93.84 | 58 | Haines Avenue – Rapid City | Single-point urban interchange (SPUI) | ||
59.19 | 95.26 | 59 | La Crosse Street – Rapid City | Planned future diverging diamond interchange (DDI) | ||
60.48 | 97.33 | 60 | ![]() | SPUI | ||
61.84 | 99.52 | 61 | ![]() ![]() ![]() | Eastern end of SD 79 concurrency; SPUI | ||
Box Elder | 63.42 | 102.06 | 63 | Box Elder, Ellsworth AFB Commercial Gate | Eastbound exit and westbound entrance | |
66.17 | 106.49 | 66 | ![]() | Closed October 1, 2003[7] | ||
67.15 | 108.07 | 67 | Liberty Boulevard – Box Elder, Ellsworth AFB Main Gate | Signed as exits 67A (south) and 67B (north) eastbound, Partial cloverleaf interchange | ||
New Underwood | 78.29 | 126.00 | 78 | 161st Avenue – New Underwood | ||
| 84.24 | 135.57 | 84 | 167th Avenue | ||
| 88.23 | 141.99 | 88 | 171st Avenue | Eastbound exit and westbound entrance | |
| 90.25 | 145.24 | 90 | 173rd Avenue | ||
Wasta | 98.14 | 157.94 | 98 | Base Line Road – Wasta | Partial cloverleaf interchange | |
| 101.23 | 162.91 | 101 | Jensen Road | Partial cloverleaf interchange | |
| 107.85 | 173.57 | 107 | Cedar Butte Road | ||
Wall | 109.82 | 176.74 | 109 | ![]() | ||
110.98 | 178.60 | 110 | ![]() ![]() | |||
| 112.01 | 180.26 | 112 | ![]() | Eastern end of US 14 concurrency, trumpet interchange | |
| 116.94 | 188.20 | 116 | 239th Street | ||
| 121.98 | 196.31 | 121 | Big Foot Road | ||
Jackson | | 127.75 | 205.59 | 127 | 206th Avenue | Exit not signed for this road |
| 131.26 | 211.24 | 131 | ![]() | ||
| 143.29 | 230.60 | 143 | ![]() | Western end of SD 73 concurrency | |
Kadoka | 150.20 | 241.72 | 150 | ![]() ![]() | Eastern end of SD 73 concurrency | |
152.42 | 245.30 | 152 | ![]() | |||
Belvidere | 163.03 | 262.37 | 163 | ![]() | Western end of SD 63 concurrency | |
| 170.31 | 274.09 | 170 | ![]() | Eastern end of SD 63 concurrency | |
| 172.50 | 277.61 | 172 | Stamford Road | Exit not signed for this road | |
Jones | Okaton | 177.48 | 285.63 | 177 | Farm exit | Exit not signed |
183.48 | 295.28 | 183 | Okaton | |||
Murdo | 191.14 | 307.61 | 191 | ![]() | ||
192.64 | 310.02 | 192 | ![]() ![]() | Western end of US 83 concurrency | ||
Draper | 201.13 | 323.69 | 201 | Draper | ||
| 208.11 | 334.92 | 208 | CR S10 | Exit not signed for this road | |
Lyman | | 212.80 | 342.47 | 212 | ![]() ![]() | Eastern end of US 83 concurrency |
Vivian | 214.25 | 344.80 | 214 | Vivian | ||
| 220.31 | 354.55 | 220 | 300th Avenue | Exit not signed for this road | |
Presho | 225.38 | 362.71 | 225 | ![]() | ||
226.39 | 364.34 | 226 | ![]() ![]() | |||
Kennebec | 235.42 | 378.87 | 235 | ![]() | ||
Lyman | 241.90 | 389.30 | 241 | 321st Avenue | Exit not signed for this road | |
Reliance | 248.77 | 400.36 | 248 | ![]() ![]() | Actual SD 47 route runs parallel to the north along I-90 between exits 248 and 251 and does not connect to this interchange | |
| 251.08 | 404.07 | 251 | ![]() | Actual SD 47 route intersects I-90 at this interchange | |
Oacoma | 260.47 | 419.19 | 260 | ![]() | ||
Missouri River | 262.22 | 422.00 | Lewis and Clark Memorial Bridge over Lake Francis Case | |||
Brule | Chamberlain | 263.53 | 424.11 | 263 | S. Main Street – Chamberlain | Partial cloverleaf interchange |
265.85 | 427.84 | 265 | ![]() ![]() | Western end of SD 50 concurrency | ||
Pukwana | 272.63 | 438.76 | 272 | ![]() | Eastern end of SD 50 concurrency | |
Kimball | 284.05 | 457.13 | 284 | ![]() | Western end of SD 45 concurrency | |
| 289.22 | 465.45 | 289 | ![]() | Eastern end of SD 45 concurrency | |
Aurora | White Lake | 296.68 | 477.46 | 296 | White Lake | |
Plankinton | 308.25 | 496.08 | 308 | Plankinton | ||
| 310.48 | 499.67 | 310 | ![]() | ||
Davison | Mount Vernon | 319.43 | 514.07 | 319 | Mount Vernon | |
| 325.42 | 523.71 | 325 | Betts Road | ||
Mitchell | 330.41 | 531.74 | 330 | ![]() ![]() | Western end of SD 37 concurrency | |
332.17 | 534.58 | 332 | ![]() ![]() | Eastern end of SD 37 concurrency | ||
Hanson | | 335.42 | 539.81 | 335 | Riverside Road | |
Alexandria | 344.01 | 553.63 | 344 | ![]() | ||
| 350.05 | 563.35 | 350 | ![]() | ||
McCook | | 353.98 | 569.68 | 353 | Spencer, Emery | |
| 357.99 | 576.13 | 357 | Bridgewater, Canova | ||
Salem | 364.01 | 585.82 | 364 | ![]() | ||
| 368.05 | 592.32 | 368 | Canistota | ||
| 374.02 | 601.93 | 374 | Montrose | ||
Minnehaha | Humboldt | 379.63 | 610.96 | 379 | ![]() | |
Hartford | 387.46 | 623.56 | 387 | Hartford | ||
390.21 | 627.98 | 390 | ![]() | Partial cloverleaf interchange | ||
Sioux Falls | 395.46 | 636.43 | 395 | Marion Road | Partial cloverleaf interchange | |
396.52 | 638.14 | 396 | ![]() | Signed as exits 396A (southbound) and 396B (northbound); cloverleaf interchange; I-29 exits 84A-B | ||
399.54 | 643.00 | 399 | ![]() ![]() | Former I-90 Business Spur; SPUI | ||
400.58 | 644.67 | 400 | ![]() | Half-clover interchange, I-229 exits 10A–B northbound; no access to or from CR 125 (476th Street) | ||
| 402.55 | 647.84 | 402 | ![]() | Future northern terminus of SD 100 | |
Brandon | 406.54 | 654.26 | 406 | ![]() | ||
Valley Springs | 410.57 | 660.75 | 410 | Valley Springs, Garretson | ||
| 412.76 | 664.27 | ![]() | Continuation into Minnesota | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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References[]
- ^ "Route Log- Main Routes of the Eisenhower National System of Interstate and Defense Highways - Table 1". Federal Highway Administration. Retrieved 4 October 2014.
- ^ "South Dakota Codified Laws - § 31-4-184". South Dakota Legislature. Retrieved 2008-06-25.
- ^ Hunhoff, Bernie (July 2015). "Old Highway 16". South Dakota Magazine. South Dakota Magazine. Retrieved February 10, 2020.
- ^ "Interstate history recorded". The Rapid City Journal. November 24, 1976. p. 2. Retrieved December 3, 2021 – via Newspapers.com.
- ^ Jacobs, Travis (August 12, 2017). "Purple Heart Memorial Highway". KIKN. Retrieved June 18, 2018.
- ^ Rietman, Diane (December 5, 2002). "Agreement leaves Exit 66 open until next fall". The Rapid City Journal. Retrieved June 8, 2017.
- ^ a b Daly, Dan (October 1, 2003). "Exit 66 now road to nowhere". The Rapid City Journal. Retrieved June 8, 2017.
- ^ Aust, Scott (September 3, 2004). "Box Elder Officials: Exit 66 land sale pending". The Rapid City Journal. Retrieved June 8, 2017.
- ^ "Pavement Condition Monitoring". South Dakota Department of Transportation. Retrieved July 11, 2015.
External links[]
Route map:
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Media related to Interstate 90 in South Dakota at Wikimedia Commons
- Interstate Highways in South Dakota
- Interstate 90
- Transportation in Sioux Falls, South Dakota
- Transportation in Lawrence County, South Dakota
- Transportation in Meade County, South Dakota
- Transportation in Pennington County, South Dakota
- Transportation in Rapid City, South Dakota
- Transportation in Jackson County, South Dakota
- Transportation in Jones County, South Dakota
- Transportation in Lyman County, South Dakota
- Transportation in Brule County, South Dakota
- Transportation in Aurora County, South Dakota
- Transportation in Davison County, South Dakota
- Transportation in Hanson County, South Dakota
- Transportation in McCook County, South Dakota
- Transportation in Minnehaha County, South Dakota