Located in Cherokee, Iowa, the Simonsen Subwatershed Lat B Sta 64+20 dam was completed in 1952 by the USDA NRCS for fire protection, stock, and small fish pond purposes. This earth dam stands at a height of 28 feet and spans 300 feet, providing a storage capacity of 57 acre-feet with a surface area of 1.6 acres. With a low hazard potential and moderate risk assessment, this dam on Rock Creek is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement to ensure its safety and functionality.

Owned by the local government, this dam plays a crucial role in flood risk reduction for the surrounding area. With a drainage area of 0.86 square miles, the Simonsen Subwatershed Lat B Sta 64+20 dam is designed to manage water flow and protect downstream communities. Despite being uncontrolled, the dam's spillway width and discharge capabilities are not specified, highlighting the need for further assessment and potential modifications to enhance its efficiency and safety measures. As a key structure in the region, this dam serves as a vital resource for water management and climate resilience efforts.

As a significant component of the water infrastructure in Cherokee, Iowa, the Simonsen Subwatershed Lat B Sta 64+20 dam requires ongoing monitoring and maintenance to ensure its continued functionality and safety. With its primary purpose of fire protection and stock pond management, this earth dam provides essential storage capacity and flood risk reduction benefits for the local community. By adhering to state regulations and inspection protocols, the dam exemplifies responsible water resource management practices in the region, contributing to overall environmental sustainability and resilience in the face of changing climate conditions.