The Fargo 4th St South Dam, also known as Midtown Dam, is a vital structure owned by the local government in Fargo, North Dakota. Completed in 1929, this masonry dam serves the primary purpose of water supply, with a height of 9.7 feet and a length of 200 feet. Situated on the Red River, the dam has a storage capacity of 627 acre-feet and covers a surface area of 194 acres, contributing to the management of water resources in the region.

Managed by the US Army Corps of Engineers, the Fargo 4th St South Dam has undergone structural modifications in 1961 and 1998 to enhance its functionality. The dam features an uncontrolled spillway with a width of 120 feet and is regulated by the North Dakota State Water Commission. While the dam has a low hazard potential and a moderate risk assessment rating, it has not been formally assessed for its condition, highlighting the ongoing need for inspection and maintenance to ensure its continued effectiveness in water management for the community.

Located in Cass County, North Dakota, the Fargo 4th St South Dam plays a crucial role in the water infrastructure of the region, providing a reliable source of water supply and flood control along the Red River. With its historical significance and ongoing regulatory oversight, this dam serves as a key asset in safeguarding water resources and addressing the impacts of climate change on the local environment.