There are 14 business loops and spurs from Interstate 90 in South Dakota:
Spearfish
Sturgis - profiled here
Rapid City
Wall
Kadoka
Belvidere (spur)
Murdo
Vivian
Presho
Oacoma/Chamberlain
White Lake (spur/unsigned)
Plankinton
Mitchell
Sioux Falls (spur)
The list however only includes two I-90 Business routes that are officially owned by the state of South Dakota. Those include the Interstate 90 Business Loops at Mitchell and Chamberlain. All other routes are either city-owned (Rapid City, Sioux Falls, Spearfish, Wall) or are on the state payroll as another state highway. Information on state highways turned over to cities can be found at the South Dakota Codified Law site.1
Business Loop Interstate 90 - Sturgis (Eastbound)
The Sturgis business loop begins at Exit 30, Junction Alternate U.S. 14 west, Business Loop I-90 east, South Dakota 34 east, and South Dakota 79 north. South Dakota 34 follows Interstate 90 between Exit 23 in Lawrence County and Exit 30 in Sturgis (Meade County). South Dakota 79 follows Interstate 90 between Exit 51 at Black Hawk and Exit 30 in Sturgis. The two state routes, along with the business loop, are signed as they travel east into the city of Sturgis. Photo taken 09/03/04.
Held in August of each year, the Sturgis Motorcycle Rally brings thousands of motorcyclists from around the country to Sturgis. During the motorcycle rally, the city of Sturgis swells in size. Occasionally, some participants become unruly or break laws, including indecent exposure. This sign (beneath a speed limit sign with both English and Metric speed limits) shows the list of laws that are enforced, including open alcoholic container (including bottles and cans) and public nudity laws. Photo taken 09/03/04.
Known as the "Key City to the Black Hills," Sturgis was founded in August 1876 and named after Major Samuel D. Sturgis, who was commander of nearby Fort Meade. The city is home to 6,682 people as of the 2000 Census; it is seat of Meade County, northwest of Rapid City. It lies on the eastern slope of the Black Hills along the Interstate 90 corridor. Photo taken 09/03/04.
Another shield assembly featuring Business Loop I-90, South Dakota 34, and South Dakota 79 is posted along eastbound Lazelle Street at the intersection with Eighth Street. The three routes will remain joined together on Lazelle Street until Junction Street, which is about eight blocks east of here, in downtown Sturgis. Photo taken 09/03/04.
At Junction Avenue, Business Loop I-90 turns south to pass through downtown Sturgis. South Dakota 34 and South Dakota 79 continue east along Lazelle Street to depart from Sturgis. South Dakota 34 will cross the state, connecting with U.S. 14 in western Stanley County and serving the state capital city of Pierre. Meanwhile, South Dakota 79 travels north to Vale, Newell, and Castle Rock. The highway becomes North Dakota 22 upon entering that state. Photo taken 09/03/04.
Business Loop Interstate 90 - Sturgis (Westbound)
Businesses in Downtown Sturgis line both sides of Junction Avenue (Business Loop I-90). This vantage point shows southbound Junction Avenue in downtown Sturgis; this is old U.S. 14. Continue south on Junction Avenue to return to Interstate 90 at Exit 32. Photo taken 09/03/04.
Sources:
Schwartze, Brad: email: "Some Notes on South Dakota Roads That You've Visited Last Year," July 11, 2008.
