South Dakota Highway 109

South Dakota Highway 109 (SD 109) is a 12.167-mile (19.581 km) state highway in Grant and Roberts counties in South Dakota, United States, runs along the south side of Big Stone Lake and the Minnesota border from U.S. Route 12 in Big Stone City to South Dakota Highway 15.

Highway 109 marker

Highway 109

Route of SD 109 (in red)
Route information
Maintained by SDDOT
Length12.167 mi[1] (19.581 km)
Existed1975[2]–present
HistorySD 15Y: 1962–1975[2]
Major junctions
South end US 12 in Big Stone City
North end SD 15 in Geneseo Township
Location
CountryUnited States
StateSouth Dakota
CountiesGrant, Roberts
Highway system
  • South Dakota State Trunk Highway System
← SD 106→ SD 115

Route description

SD 109 begins at an intersection with US 12 in Big Stone City. It immediately crosses a bridge spanning railroad tracks and it heads northwest out of town. The highway follows the curvature of Big Stone Lake on the Minnesota River to the northwest and west for 12 miles (19 km). It ends at a 90-degree bend in SD 15 east of Hartford Beach State Park.[3]

History

SD 109 was originally designated Highway 15Y. It was renumbered to 109 in 1975.[2]

Major intersections
CountyLocationmi[1]kmDestinationsNotes
GrantBig Stone City0.0000.000 US 12 – Milbank, Big Stone City
RobertsGeneseo Township12.16719.581 SD 15 – Milbank, Hartford Beach, Wilmot
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References
  1. "Transportation Inventory Management". South Dakota Department of Transportation. Retrieved September 9, 2011.
  2. "Highway Division Makes Road Numbering Changes". The Sioux Falls Argus-Leader. March 20, 1975. p. 2 (32). Retrieved March 18, 2020 – via Newspapers.com. open access
  3. Google (September 9, 2011). "South Dakota Highway 109" (Map). Google Maps. Google. Retrieved September 9, 2011.
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