Neche–Gretna Border Crossing  The Neche–Gretna Border Crossing connects the cities of Neche, North Dakota and Gretna, Manitoba on the Canada–United States border. It is connected by North Dakota Highway 18 in Pembina County on the American side and Manitoba Highway 30 in the Municipality of Rhineland on the Canadian side. Canada first established Gretna as a Port of Entry in 1883. This crossing is frequently closed due to flooding of the Pembina River, most recently in 2009, 2011, 2013 and 2017. The US border station of Neche, which was built in 1965, was replaced in 2011. The Gretna border station was built in 1981. It was slated to be replaced in 2017.