Highway 1806 marker

Highway 1806

SD 1806 highlighted in red
Route information
Maintained by SDDOT
Existed1975[1]–present
Southern Gregory County segment
South end US 18 near Bonesteel
North endMule Head Road
Northern Gregory County segment
South endOld 1806 Road south / Lakeview Drive
North end SD 44 west of Platte
Lyman–Stanley Counties segment
Length122.603 mi (197.310 km)
South end SD 273 north of Kennebec
Major intersections US 14 / US 83 / SD 34 in Fort Pierre
North endMinneconjou Road near Mission Ridge
Corson County segment
South end280 Avenue southwest of Mobridge
Major intersections US 12 / SD 20 northeast of Mobridge
North endBIA Rd. 3 to ND 1806 in Kenel
Location
CountryUnited States
StateSouth Dakota
CountiesGregory, Lyman, Stanley, Corson
Highway system
  • South Dakota State Trunk Highway System
← SD 1804→ SD 8

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.[2]

Route description

Gregory County

Southern segment

Northern segment

Lyman and Stanley Counties

SD 1806 begins at the northern terminus of SD 273 in Lyman County and begins heading northwest. The route remains a two lane road and follows the Missouri River, heading towards Pierre. As it nears Pierre, the route becomes concurrent with US 83 and enters Fort Pierre. At the north end of Fort Pierre, US 83 becomes concurrent with US 14 heading east while SD 1806 splits from US 83 and becomes concurrent with US 14 and SD 34 for nearly a mile, heading west from the Deadwood Street and Yellowstone Street intersection. After one mile of concurrency, SD 1806 splits from US 14/SD 34 and heads north, passing by the Fort Pierre Chouteau National Historic Landmark and remaining parallel with the Missouri River. It then passes by Lake Oahe, intersecting the west end of SD 204 which passes over the Oahe Dam. SD 1806 continues west and remains parallel with the Missouri River until reaching Sansarc Road. The route continues northwest and ends at an intersection with Minneconjou Road south of Mission Ridge.

Corson County

History

A portion of SD 1806 near Lake Oahe was numbered as SD 514. It was later redesignated into parts of SD 1804, SD 204, and part of today's portion of SD 1806.

Major intersections

CountyLocationmi[3][4]kmDestinationsNotes
Gregory​15.6825.23 US 18Southern terminus; road continues unpaved as 361 Avenue
​23.8638.40Old 1806 Road northTo SD 1806 (Northern Gregory County segment)
​25.7541.44Mule Head RoadContinuation beyond northern terminus of southern segment
Gap in route
​37.8860.96Old 1806 Road south / Lakeview DriveSouthern terminus of northern segment; road continues east as Lakeview Dr.; Old 1806 Rd. provides access to SD 1806 (Southern Gregory County segment)
​48.5578.13 SD 44Northern terminus
Gap in route
LymanLower Brule Indian Reservation138.45222.81
 SD 273 south / Lewis and Clark Trail		Southern terminus; northern terminus of SD 273; road continues east as Medicine Bull Memorial Highway (Iron Nation Road)
StanleyFort Pierre180.05
116.94		289.76
188.20
 US 83 south		Southern end of US 83 concurrency; mileposts change to reflect US 83 mileage
138.73
227.73		223.26
366.50

 US 14 / SD 34 east / US 83 north / Lewis and Clark Trail – Pierre		Northern end of US 83 concurrency; southern end of US 14/SD 34 concurrency; mileposts change to reflect US 14 mileage
226.86
186.46		365.10
300.08
 US 14 / SD 34 west – Philip		Northern end of US 14/SD 34 concurrency; mileposts change to reflect SD 1806 mileage
​191.60308.35

 SD 204 east to SD 1804		Western terminus of SD 204
​221.05355.75Minneconjou RoadContinuation beyond northern terminus
Gap in route
Corson​359.75578.96280 AvenueContinuation beyond southern terminus
​363.43584.88
 US 12 / SD 20 west / Lewis and Clark Trail		Southern end of US 12/SD 20 concurrency
​364.61586.78
 US 12 / SD 20 east – Mobridge		Northern end of US 12/SD 20 concurrency
​370.13595.67SD 1806 Spur north – WakpalaSouthern terminus of unsigned SD 1806 Spur
Kenel386.83622.54 BIA Rd. 3 / Lewis and Clark TrailContinuation beyond northern terminus; to ND 1806
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Wakpala spur

Spur plate South Dakota.svg

Highway 1806 Spur marker

Highway 1806 Spur

LocationWakpala
Length1.8 mi (2.9 km)

South Dakota Highway 1806 Spur (SD 1806P) is a 1.8-mile (2.9 km) long spur route of SD 1806. Although unsigned, it provides access to the town of Wakpala, South Dakota, located in the Standing Rock Indian Reservation.

See also

References

  1. ↑ "Highway Division Makes Road Numbering Changes". The Sioux Falls Argus-Leader. March 20, 1975. p. 2. Retrieved November 15, 2021 – via Newspapers.com. Open access icon
  2. ↑ Hunhoff, Bernie (June 14, 2016). "A River Road Called 1806". South Dakota Magazine. Retrieved November 15, 2021.
  3. ↑
  4. ↑
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