Zellmer Subwtrshd #B 22+50 is a vital water resource located in Woodbury County, Iowa, specifically in the city of Rolly Springs. This earth dam structure, completed in 1964, serves multiple purposes, including fire protection, stock watering, small fish pond maintenance, and flood risk reduction. With a dam height of 27 feet and a storage capacity of 52 acre-feet, this reservoir covers a surface area of 3.1 acres and has a drainage area of 0.28 square miles.

Managed by the USDA NRCS and regulated by the Iowa DNR, Zellmer Subwtrshd #B 22+50 is classified as a low hazard potential structure with a moderate risk assessment score of 3. While the condition is currently not rated, the dam is inspected, permitted, and enforced by state agencies to ensure its safety and functionality. With a primary purpose of safeguarding the surrounding area from potential flooding and providing essential water resources, this structure plays a crucial role in water management and climate resilience efforts in the region.

Despite its relatively modest size and capacity, Zellmer Subwtrshd #B 22+50 contributes significantly to the local ecosystem and community resilience. As water resource and climate enthusiasts, understanding and monitoring the condition and management of structures like this one is essential for sustainable water use and environmental conservation. The collaborative efforts of federal and state agencies, along with ongoing risk assessments and management measures, are crucial in ensuring the continued effectiveness and safety of this important water resource infrastructure.