Interstate 90 in South Dakota

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 east and north of the tourist town of Deadwood before entering Meade County, going just to the west of Sturgis and picking up a concurrency with South Dakota Highway 79.

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 the Mount Rushmore National Memorial. 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, also bringing SD 79 into 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 through to Jackson County. The exits for Badlands National Park to the south are within fifteen miles either way of this county line. The concurrency for US-14 also ends just east of Wall.

From there, the route passes mostly east-west through Jackson, Jones and Lyman counties. It is in Lyman County, at Exit 212 in Vivian, that the highway provides its closest link to the capital city of Pierre, along U.S. Route 83, some thirty-five miles north. The road crosses the Missouri River at Lake Francis Case, between the towns of Oacoma and Chamberlain, also crossing into Brule County.

It then continues through Aurora County, Davison County (where Mitchell and the Corn Palace are located), Hanson County, McCook County and Minnehaha County. In Minnehaha County, the interstate intersects the only other major interstate in the state, Interstate 29, at Sioux Falls. Just east of Interstate 29 is where Interstate 90 meets the northern terminus of Interstate 229. It then ends its 412-mile trek through South Dakota northeast of Valley Springs before entering Minnesota and Rock County, just west of the towns of Beaver Creek and Manley.

Codified law

The South Dakota section of I-90 is defined at South Dakota Codified Laws § 31-4-184.^[2]

History

Removal of exit 66

In the city of Box Elder, exit 66, which crossed South Dakota Highway 435, was closed on October 1, 2003. The partial cloverleaf interchange of exit 66 was also demolished. Since the closure, local citizens and officials feared the lack of entrances which access the Ellsworth Air Force Base. However, the move was made to emphasize their concerns regarding to commercial development and its concisions with the Ellsworth forces. 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.^[3]

Exit list

County	Location	Mile^[4]	#	Destinations	Notes
Lawrence		2.25	2	McNenny State Fish Hatchery
		8.96	8	McGuigan Road – Black Hills National Forest
		10.26	10	I-90 Bus. east (North Avenue) / US 85 north – Spearfish, Belle Fourche	West end of US 85 overlap
	Spearfish	12.32	12	Jackson Boulevard – Black Hills State University
	Spearfish	14.42	14	I-90 Bus. west / US 14A east (Scenic Byway) – Spearfish Canyon, Spearfish, Black Hills National Forest
		18.16	17	US 85 south – Deadwood, Lead	East end of US 85 overlap
		23.73	23	SD 34 west – Whitewood, Belle Fourche	West end of SD 34 overlap
Meade	Sturgis	30.28	30	I-90 Bus. east / SD 34 east / SD 79 north (Lazelle Street) / US 14A west – Sturgis, Deadwood, Lead	East end of SD 34 overlap; west end of SD 79 overlap
	Sturgis	32.41	32	I-90 Bus. west (Junction Avenue)
		34.81	34	Black Hills National Cemetery
		37.01	37	Pleasant Valley Road
		40.20	40	Tilford Road, Bethlehem Road
		44.66	44	Bethlehem Road
		46.14	46	Elk Creek Road
		48.43	48	Stagebarn Canyon Road
		52.38	52	Peaceful Pines Road – Black Hawk
Pennington	Rapid City	55.66	55	Deadwood Avenue
		57.76	57	I-190 / US 16 west – Mount Rushmore, Black Hills National Forest
		58.31	58	Haines Avenue
		59.19	59	La Crosse Street
		60.48	60	I-90 Bus. west (East North Street)
		61.84	61	US 16 Truck / SD 79 south – Crazy Horse, Mount Rushmore	East end of SD 79 overlap
	Box Elder	63.42	63	Box Elder, Ellsworth AFB Commercial Gate	Eastbound exit and westbound entrance
		66.17	66	SD 435 – Ellsworth AFB	Closed October 1, 2003^[3]
		67.15	67	Liberty Boulevard – Box Elder, Ellsworth AFB Main Gate	Signed as exits 67A (south) and 67B (north) eastbound
		78.29	78	161st Avenue – New Underwood
		84.24	84	167th Avenue, County Road 497
		88.23	88	171st Avenue	Eastbound exit and westbound entrance
		90.25	90	173rd Avenue
	Wasta	98.14	99	Base Line Road – Wasta
		101.23	101	Jensen Road, County Road T-504
		107.85	107	Cedar Butte Road
	Wall	109.82	109	I-90 Bus. east – Wall
	Wall	110.98	110	I-90 Bus. west / SD 240 (Badlands Loop) – Wall, Badlands
		112.01	112	US 14 east – Philip, Pierre	East end of US 14 overlap
		116.94	116	239th Street
		121.98	121	Big Foot Road
Jackson		127.75	127	(no name)
		131.26	131	SD 240 (Badlands Loop) – Interior, Badlands
		143.29	143	SD 73 north – Philip	West end of SD 73 overlap
	Kadoka	150.20	150	I-90 Bus. east / SD 73 south – Kadoka	East end of SD 73 overlap
		152.42	152	I-90 Bus. west / South Creek Road – Kadoka
		163.03	163	SD 63 south – Belvidere	West end of SD 63 overlap
		170.31	170	SD 63 north – Midland	East end of SD 63 overlap
		172.50	172	(no name)	Stamford is about one mile east/southest of the exit
Jones		177.48	177	(no name)
		183.48	183	Okaton
		191.14	191	I-90 Bus. east – Murdo
	Murdo	192.64	192	I-90 Bus. west / US 83 south – Murdo, White River	West end of US 83 overlap
		201.13	201	Draper
		208.11	208	(no name)
Lyman		212.80	212	US 83 north / SD 53 – Pierre, Fort Pierre	East end of US 83 overlap
		214.15	214	Vivian
		220.31	220	(no name)
		225.38	225	I-90 Bus. east – Presho
		226.39	226	I-90 Bus. west / US 183 – Winner, Presho
	Kennebec	235.42	235	SD 273 – Kennebec
		241.90	241	(no name)
		248.77	248	SD 47 north – Reliance	West end of SD 47 overlap
		251.08	251	SD 47 south – Gregory, Winner	East end of SD 47 overlap
	Oacoma	260.47	260	I-90 Bus. east – Oacoma, Chamberlain
Brule	Chamberlain	263.53	263	Chamberlain
	Chamberlain	265.85	265	I-90 Bus. west / SD 50 north – Chamberlain	West end of SD 50 overlap
		272.63	272	SD 50 south – Pukwana	East end of SD 50 overlap
	Kimball	284.05	284	SD 45 north – Kimball	West end of SD 45 overlap
		289.22	289	SD 45 south – Platte	East end of SD 45 overlap
Aurora		296.68	296	White Lake
		308.25	308	Plankinton
		310.48	310	US 281 – Aberdeen, Stickney
Davison		319.43	319	Mount Vernon
		325.42	325	Betts Road
	Mitchell	330.41	330	I-90 Bus. east / SD 37 north – Mitchell, Huron	West end of SD 37 overlap
	Mitchell	332.17	332	I-90 Bus. west / SD 37 south – Mitchell, Parkston	East end of SD 37 overlap
Hanson		335.42	335	Riverside Road
		344.01	344	SD 262 east – Fulton, Alexandria
		350.05	350	SD 25 – Emery, Farmer
McCook		353.98	353	Spencer, Emery
		357.99	357	Bridgewater, Canova
		364.01	364	US 81 – Salem, Yankton
		368.05	368	Canistota
		374.02	374	Montrose
Minnehaha		379.63	379	SD 19 – Humboldt, Madison
		387.46	387	Hartford
		390.21	390	SD 38 – Buffalo Ridge, Hartford
		396.52	396	I-29 – Fargo, Sioux City	Signed as exits 396A (south) and 396B (north)
	Sioux Falls	399.54	399	I-90 Bus. (Cliff Avenue) / SD 115 – Sioux Falls Airport, Renner
		400.58	400	I-229
		402.55	402	U.S. Geological Survey, EROS Data Center
	Brandon	406.54	406	SD 11 – Brandon, Corson
		410.57	410	Valley Springs, Garretson, Booge

References

^ Route Log- Main Routes of the Eisenhower National System of Interstate and Defense Highways - Table 1
^ "South Dakota Codified Laws - § 31-4-184". South Dakota Legislature. http://legis.state.sd.us/statutes/DisplayStatute.aspx?Type=Statute&Statute=31-4-184. Retrieved 2008-06-25.
^ ^a ^b http://www.interstate-guide.com,Interstate 90 - What happened to South Dakota's Exit 66?
^ "Transportation Inventory Management". South Dakota Department of Transportation. http://www.sddot.com/pe/data/pave.asp. Retrieved 2008-06-25.

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