Thief Lake, located in Thief River Falls, Minnesota, is a gravity dam constructed in 1931 with a primary purpose of recreation. The dam stands at 13 feet tall, with a structural height of 19 feet and a length of 70 feet. It has a storage capacity of 63,900 acre-feet and covers a surface area of 7,430 acres, serving as a popular destination for water resource and climate enthusiasts.

The dam's drainage area spans 280 square miles, with a maximum discharge of 3,190 cubic feet per second. Despite being classified as having a low hazard potential, Thief Lake's condition assessment in 2009 was deemed fair. The dam has undergone structural modifications in 1998 and 2016, ensuring its continued functionality and safety for visitors and surrounding communities.

Thief Lake's risk assessment is very high, indicating the need for active risk management measures to mitigate potential hazards. With its controlled spillway and regulated state oversight, the dam remains a vital resource for water management and recreational activities in the region, offering a unique opportunity for enthusiasts to explore the intersection of water resources and climate dynamics.