Unimin, also known as the Clear Water Dam, is a privately owned structure located in St. Peter, Minnesota along the Minnesota River. Built in 1982 by HAMEL GEOTECH, this earth dam stands at 20 feet tall and spans 205 feet in length. Its primary purpose is flood risk reduction, serving as a safeguard against potential water overflow in the region. The dam has a storage capacity of 350 acre-feet and covers a surface area of 9 acres, with a drainage area of 0.15 square miles.

Regulated by the Minnesota Department of Natural Resources, Unimin has undergone state permitting, inspection, and enforcement processes to ensure its structural integrity and compliance with safety standards. Despite being classified as having low hazard potential, the dam's condition assessment remains unrated. With its location in a picturesque setting by the Minnesota River, Unimin is a vital piece of infrastructure that plays a crucial role in managing water resources and mitigating flood risks in the Le Sueur County area. Enthusiasts of water resource management and climate resilience would find Unimin's design and operational details particularly captivating in the context of sustainable infrastructure development.