Neustrom Subwatershed Site M-3 is a locally-owned earth dam located in Woodbury County, Iowa, near the town of Turin. Built in 1971 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a height of 25 feet and a length of 524 feet, the dam has a storage capacity of 220 acre-feet and covers a surface area of 7.5 acres. It is regulated by the Iowa Department of Natural Resources and has a low hazard potential rating.

The dam is situated on TR-Wolf Creek and falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers. While it does not have a controlled spillway, it is designed to manage flood risk and protect the surrounding area. The dam's condition is currently unrated, but it undergoes regular inspections and is equipped with emergency action plans in case of a disaster. Overall, Neustrom Subwatershed Site M-3 plays a crucial role in water resource management and climate resilience in the region, highlighting the importance of sustainable infrastructure for safeguarding communities against natural hazards.