Long Lake in Cottonwood, Minnesota is a state-regulated body of water with a dam constructed in 2017 for flood control purposes. The dam, standing at 10 feet in height, has a storage capacity of 585 acre-feet and serves as a crucial component in managing the surrounding drainage area of 0.24 square miles. The dam is of Buttress core type and is owned and regulated by the Minnesota Department of Natural Resources (MNDNR EWR), with inspection and enforcement measures in place to ensure its safety and functionality.

Despite its low hazard potential, Long Lake plays a vital role in the local water resource management system and provides a reliable source of water for the area. The dam's construction and operation are subject to state permitting and inspection, highlighting the commitment to maintaining its integrity. Located within the St. Paul District of the US Army Corps of Engineers jurisdiction, Long Lake is a testament to responsible water infrastructure development in the face of climate change challenges.

Water resource and climate enthusiasts can appreciate Long Lake as a case study in sustainable dam construction and management practices. As part of the state's regulatory framework, the dam represents a proactive approach to addressing water-related hazards and ensuring the safety of communities in the region. With its storage capacity and low hazard potential, Long Lake serves as a model for effective water resource management in Minnesota, demonstrating the importance of collaboration between state agencies and local stakeholders in safeguarding valuable water resources for future generations.