Dam 87-Main, located in Burlington, North Dakota, is a vital part of the Upper Souris National Wildlife Refuge. Built in 1936 by the USFWS, this federal-owned earth dam serves as a Fish and Wildlife Pond, providing essential habitat for various species in the area. With a height of 16.2 feet and a length of 1800 feet, the dam has a storage capacity of 1214 acre-feet and covers a surface area of 288 acres.

The dam, situated on the Souris River, is regulated by the state of North Dakota and has a spillway width of 700 feet. It is classified as having a low hazard potential and a moderate risk level. The structure features Tainter radial gates and is inspected regularly to ensure its integrity and safety. While the dam's condition is currently not rated, it plays a crucial role in managing water resources and maintaining the ecological balance of the region.

Dam 87-Main is a significant asset in the conservation efforts of the area, providing essential support for wildlife and contributing to the overall health of the ecosystem. Its presence not only helps in managing water levels and drainage but also serves as a crucial habitat for various species. With its strategic location and design, the dam continues to be a key element in maintaining the ecological balance of the Upper Souris NWR and the surrounding areas.