Audubon Nwr-Impoundment#1, located in McLean, North Dakota, is a Federal-owned fish and wildlife pond designed by USFWS. This Earth dam, completed in 1979, stands at a height of 13 feet and spans a length of 700 feet. With a storage capacity of 120 acre-feet and a surface area of 30 acres, this impoundment serves as a critical habitat for various aquatic species in the region.

Managed by the US Army Corps of Engineers' St. Paul District, Audubon Nwr-Impoundment#1 is regulated by the North Dakota State Water Commission. Despite its low hazard potential and current "Not Rated" condition assessment, the impoundment poses a high risk due to its proximity to Lake Audubon and the potential for inundation. While no emergency action plan is currently in place, the impoundment meets state permitting and inspection requirements, ensuring its continued operation for fish and wildlife conservation.

As climate change continues to impact water resources and habitats, Audubon Nwr-Impoundment#1 serves as a vital refuge for the region's biodiversity. With its strategic location and purposeful design, this impoundment plays a crucial role in maintaining healthy ecosystems and supporting the conservation efforts of the US Fish and Wildlife Service.