High Quality Content by WIKIPEDIA articles! The Valley City Wetland Management District is located in the U.S. state of North Dakota and consists of 76,000 acres (307 km2). The wetland district is a substation of the Arrowwood National Wildlife Refuge Complex, overseen by the U.S. Fish and Wildlife Service. 82 waterfowl production areas and four separate national wildlife refuges which are privately owned are in turn managed by the wetland district as easement refuges. The wetland district is in portions of 5 counties in the Prairie Pothole Region that was created by the retreat of glaciers 12,000 years ago, during the last glacial maximum. One third of the protected lands are wetlands with the balance consisting of prairie.