2021 Map of Oldham NW

About this map

The glacial highlands of the Coteau des Prairies define this landscape in eastern South Dakota, where the headwaters of the E Fork Vermillion River begin their southward trek. This survey captures the transition between the expansive marshy waters of Lake Thompson Vermillion Flats in the north and the high prairie plateau that separates the Big Sioux and James River basins. The rugged agricultural grid is well-established, following section lines with a network of numbered avenues and streets that connect isolated farmsteads. For genealogists and local historians, the Berton Cem serves as a significant landmark in the southwestern portion of the quadrangle, marking the site of an early community presence near the border of Kingsbury and Miner counties.