Long Tom Lake, located in Big Stone, Minnesota, is a privately-owned reservoir with a low hazard potential and satisfactory condition assessment. Built in 1967 by the USDA NRCS, this gravity dam stands at a height of 15 feet and has a maximum storage capacity of 4266 acre-feet. The lake covers a surface area of 147 acres and serves as a vital water resource in the region for various purposes, including irrigation and recreation.

Managed by the Minnesota Department of Natural Resources, Long Tom Lake is regulated, inspected, and enforced by state authorities to ensure its safety and functionality. The dam's spillway type is uncontrolled, and it has an uncontrolled outlet gates system. The risk assessment for the dam is moderate, with a DSAC assigned date pending. With its scenic location along the Stony Run river, Long Tom Lake provides a picturesque setting for water resource and climate enthusiasts to appreciate the importance of sustainable water management practices in the region.