Klein is a privately owned dam located in Grant, Wisconsin, along the Unnamed Tributary to Little Platte River. Built in 1972 by the USDA NRCS, Klein serves primarily for recreation purposes, with a dam height of 29 feet and a length of 370 feet. The dam has a storage capacity of 40 acre-feet and a normal storage level of 8 acre-feet, covering a surface area of 3 acres and draining a 0.5 square mile watershed.

Managed by the Wisconsin Department of Natural Resources, Klein is regulated, permitted, inspected, and enforced by the state agency. The dam's condition assessment in May 2020 rated it as fair with low hazard potential. Although it meets current guidelines, a moderate risk assessment of 3 indicates the need for ongoing risk management measures. The last inspection in July 2018 noted a 10-year inspection frequency for this earth dam with buttress core type.

Overall, Klein dam provides a valuable recreational resource in the region while maintaining a moderate risk level that requires continued monitoring and management. With its low hazard potential and fair condition, the dam's structural integrity and safety are of utmost importance to protect both the environment and surrounding communities along the Little Platte River watershed.