Thieszen Dam, located in McCool Junction, Nebraska, is a privately owned structure designed by the USDA NRCS and regulated by the Nebraska DNR. Completed in 1969, this earth dam stands at a height of 27 feet and has a maximum storage capacity of 73 acre-feet. With a primary purpose of flood risk reduction, Thieszen Dam also serves other important functions in the region.

Despite its low hazard potential, the dam's condition assessment is rated as poor, highlighting the need for maintenance and improvements. The last inspection in June 2017 revealed areas that require attention to ensure the dam's safety and functionality. With a drainage area of 0.4 square miles and a maximum discharge of 199 cubic feet per second, Thieszen Dam plays a crucial role in managing water resources in the area.

Water resource and climate enthusiasts should take note of Thieszen Dam as a significant infrastructure for flood risk reduction and water management in Hamilton County, Nebraska. The dam's location on the TR-W FK BIG BLUE RIVER, its association with the USDA NRCS, and its importance in protecting the surrounding areas from potential flooding make it a key feature in the region's water resource management system. As efforts continue to address the dam's poor condition, stakeholders and officials must prioritize its maintenance to ensure its continued effectiveness and safety for the community.