South Dakota Highway 1806 (SD 1806) is a

state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...

in the U.S. state of

South Dakota South Dakota (; Sioux language, Sioux: , ) is a U.S. state in the West North Central states, North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Lakota people, Lakota and Dakota peo ...

. 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 Pierre is a masculine given name. It is a French form of the name Peter. Pierre originally meant "rock" or "stone" in French (derived from the Greek word πέτρος (''petros'') meaning "stone, rock", via Latin "petra"). It is a translation ...

. SD 1806 along with

SD 1804 South Dakota Highway 1804 (SD 1804) is a state highway in the U.S. state of South Dakota. It consists of four disconnected segments. The southernmost segment is in the central part of Charles Mix County. It travels from the shore of ...

are numbered from the years of the

Lewis and Clark Expedition The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase. The Corps of Discovery was a select gro ...

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 Lyman County is a county located in the U.S. state of South Dakota. As of the 2020 census, the population was 3,718. Its county seat is Kennebec. Lyman County was created by the Dakota Territorial Legislature on January 8, 1873, but was not o ...

and begins heading northwest. The route remains a two lane road and follows the Missouri River, heading towards

. As it nears Pierre, the route becomes concurrent with

US 83 U.S. Route 83 (US 83) is a major north–south United States Numbered Highway that extends in the central United States. Only four other north–south routes are longer: US 1, US 41, US 59, and US 87, while US ...

and enters Fort Pierre. At the north end of Fort Pierre, US 83 becomes concurrent with

US 14 U.S. Route 14 (abbreviated U.S. 14 or US 14), an east–west route, is one of the original United States highways of 1926. It currently has a length of 1,398 miles (2,250 km), but it had a peak length of 1,429 miles (2,300 km). For ...

heading east while SD 1806 splits from US 83 and becomes concurrent with US 14 and

SD 34 South Dakota Highway 34 (SD 34) is a state route that runs parallel to Interstate 90 across the entire state of South Dakota. It begins at the Wyoming border west of Belle Fourche, as a continuation of Wyoming Highway 24 (WYO 24). The easte ...

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 Lake Oahe () is a large reservoir behind Oahe Dam on the Missouri River; it begins in central South Dakota and continues north into North Dakota in the United States. The lake has an area of and a maximum depth of . By volume, it is the List of l ...

, intersecting the west end of SD 204 which passes over the

Oahe Dam The Oahe Dam is a large earthen dam on the Missouri River, just north of Pierre, South Dakota, United States. The dam creates Lake Oahe, the fourth-largest man-made reservoir in the United States. The reservoir stretches up the course of the Mi ...

. 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

Wakpala spur

South Dakota Highway 1806 Spur (SD 1806P) is a long spur route of SD 1806. Although unsigned, it provides access to the town of

Wakpala, South Dakota Wakpala is an unincorporated community in Corson County, South Dakota, United States, on the west side of the Missouri River, north-northwest of Mobridge. Although not tracked by the Census Bureau, Wakpala has been assigned the ZIP code of 5765 ...

, located in the

Standing Rock Indian Reservation The Standing Rock Reservation ( lkt, Íŋyaŋ Woslál Háŋ) lies across the border between North and South Dakota in the United States, and is inhabited by ethnic "Hunkpapa and Sihasapa bands of Lakota Oyate and the Ihunktuwona and Pabaksa ...

References

External links

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1806 Events January–March * January 1 ** The French Republican Calendar is abolished. ** The Kingdom of Bavaria is established by Napoleon. * January 5 – The body of Horatio Nelson, 1st Viscount Nelson, lies in state in the Painted Hall ...

Transportation in Gregory County, South Dakota Transportation in Lyman County, South Dakota Transportation in Stanley County, South Dakota Transportation in Corson County, South Dakota