State Historical Society of North Dakota State Historical Society of North Dakota The State Historical Society of North Dakota is an agency that preserves and presents history through museums and historic sites in the state of North Dakota. The agency operates the North Dakota Heritage Center in Bismarck, which serves as a history museum for the state, oversees the preservation of the state's historic places, and presents the history of the state to the public in exhibits and branch museums. The Society also operates the Former North Dakota Executive Mansion in Bismarck. Headquartered in Bismarck, the State Historical Society consists of one governing board of appointees
U.S. Route 81 in North Dakota of Grafton before joining North Dakota Highway 5 (ND 5) near Cavalier. It rejoins I-29 and continues to the US–Canada border at Pembina. The original route of US 81 survives as ND 127 and 'County Road 81' in Richland, Cass, Traill, and Grand Forks counties. Exit numbers are I-29 exit numbers. U.S. Route 81 in North Dakota U.S. Route 81 (US 81) is a part of the U.S. Highway System that travels from Fort Worth, Texas, to the Pembina–Emerson Border Crossing near Pembina. In the state of North Dakota, US 81 extends from the South Dakota border north to the