 Highway 1806 | ||||
|---|---|---|---|---|
 SD 1806 highlighted in red | ||||
| Route information | ||||
| Maintained by SDDOT | ||||
| Existed | 1975[3]–present | |||
| Southern Gregory County segment | ||||
| South end |  US 18 near Bonesteel | |||
| North end | Mule Head Road | |||
| Northern Gregory County segment | ||||
| South end | Old 1806 Road south / Lakeview Drive | |||
| North end |  SD 44 west of Platte | |||
| Lyman–Stanley Counties segment | ||||
| Length | 122.603 mi (197.310 km) | |||
| South end |  SD 273 north of Kennebec | |||
| Major intersections |    US 14 / US 83 / SD 34 in Fort Pierre | |||
| North end | Minneconjou Road near Mission Ridge | |||
| Corson County segment | ||||
| South end | 280 Avenue southwest of Mobridge | |||
| Major intersections |   US 12 / SD 20 northeast of Mobridge | |||
| North end | BIA Rd. 3 to  ND 1806 in Kenel | |||
| Location | ||||
| Country | United States | |||
| State | South Dakota | |||
| Counties | Gregory, Lyman, Stanley, Corson | |||
| Highway system | ||||
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South Dakota Highway 1806 (SD 1806) is a state highway in the U.S. state of South Dakota. It exists in four distinct sections. Its longest section begins at SD 273 and runs along the Missouri River nearly its whole length, serving Pierre. SD 1806 along with SD 1804 are numbered from the years of the Lewis and Clark Expedition.[4]
- ^ "State Highway Log: Mitchell Region" (PDF). South Dakota Department of Transportation. January 2017. p. 161. Retrieved November 15, 2021.
- ^ "State Highway Log: – Pierre Region" (PDF). South Dakota Department of Transportation. January 2019. pp. 18, 70–71, 97–99. Retrieved January 18, 2022.
- ^ "Highway Division Makes Road Numbering Changes". The Sioux Falls Argus-Leader. March 20, 1975. p. 2. Retrieved November 15, 2021 – via Newspapers.com.
- ^ Hunhoff, Bernie (June 14, 2016). "A River Road Called 1806". South Dakota Magazine. Retrieved November 15, 2021.
