Haroldsen Dam, located in Linn Grove, Buena Vista County, Iowa, was completed in 1974 by the USDA NRCS and serves multiple purposes including fire protection, stock watering, and providing a small fish pond. This private dam stands at 35 feet high and spans 350 feet across TR-Brooke Creek with a storage capacity of 130 acre-feet.

Managed by the Iowa DNR, Haroldsen Dam is categorized as having a low hazard potential and a moderate risk assessment. Despite not being rated for its condition, the dam is regularly inspected, permitted, and enforced by state agencies to ensure its safety and compliance with regulations. With a surface area of 6.1 acres and a drainage area of 0.42 square miles, the dam plays a crucial role in managing water resources in the region.

Water resource and climate enthusiasts will appreciate the strategic location of Haroldsen Dam, its contribution to local water management, and its low hazard potential. With a focus on fire protection and supporting local wildlife, this earth dam demonstrates the importance of private ownership in maintaining sustainable water infrastructure. As a key feature in the Omaha District, this dam showcases the collaborative efforts between federal and state agencies in safeguarding water resources for the community.