Springdale Twp 20 is a private dam located in Redwood County, Minnesota, specifically in the city of Lamberton. This rockfill dam, with a height of 22.9 feet and a length of 440 feet, serves the primary purpose of flood risk reduction along Plum Creek-TR. The dam has a storage capacity of 51.3 acre-feet, with a normal storage level of 24.1 acre-feet and a surface area of 3.8 acres.

Managed by the Minnesota Department of Natural Resources, Springdale Twp 20 is regulated, permitted, inspected, and enforced by the state authorities. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The last inspection was conducted in April 2019, with a frequency of every 8 years. Although the emergency action plan status and risk assessment details are not provided, the dam's operations seem to align with safety guidelines.

Located in a picturesque setting, Springdale Twp 20 plays a crucial role in mitigating flood risks in the area while also providing valuable water resource management benefits. With its solid construction and state oversight, this dam remains a key infrastructure element for the community, ensuring the safety and well-being of residents in the event of potential flooding events.