Thorson Group North, located in Houston, Minnesota, is a state-regulated earth dam designed by the USDA NRCS with a primary purpose of flood risk reduction. Completed in 1963, this dam stands at 30 feet high and spans 440 feet in length, with a storage capacity of 45 acre-feet. The structure is situated along the Root River South Fork-TR and falls under the jurisdiction of the MNDNR EWR for permitting, inspection, and enforcement.

With a significant hazard potential and a satisfactory condition assessment as of 2015, the Thorson Group North dam plays a crucial role in mitigating flood risks in the area. The spillway, with a width of 125 feet, is uncontrolled, and the structure has uncontrolled outlet gates. The dam's risk assessment is moderate, with a notable discharge capacity of 800 cubic feet per second. Regular inspections are conducted every 4 years, with the most recent inspection carried out in May 2019.

Overall, Thorson Group North serves as a vital infrastructure for flood protection in Minnesota, showcasing the collaborative efforts between state agencies and the USDA NRCS in managing water resources and climate challenges. As a key component in the region's flood risk reduction strategy, this earth dam underscores the importance of proactive maintenance and regulatory oversight to ensure the safety and resilience of water infrastructure systems.