Located in Gage County, Nebraska, the Upper Big Nemaha G-20 dam stands as a testament to effective flood risk reduction measures put in place by the USDA NRCS in 1978. With a dam height of 27 feet and a length of 437 feet, this earth dam serves a vital purpose in protecting the surrounding area from potential flooding events. The dam has a normal storage capacity of 17 acre-feet, with a maximum discharge of 623 cubic feet per second, ensuring efficient water management within the region.

Managed by the local government and regulated by the Nebraska Department of Natural Resources, the Upper Big Nemaha G-20 dam undergoes regular inspections to maintain its fair condition and low hazard potential. The dam's primary purpose extends beyond flood risk reduction, with a focus on other water resource management objectives. Despite its modest surface area of 3 acres and drainage area of 0.2 square miles, the dam plays a crucial role in safeguarding the community's water resources and enhancing resilience against climate variability.

As water resource and climate enthusiasts, the significance of the Upper Big Nemaha G-20 dam lies in its contribution to sustainable water management practices and climate resilience efforts. With a strong foundation of soil and core made of stone, this dam exemplifies the collaborative efforts between government agencies and local communities in addressing water-related challenges. By adhering to state regulations and undergoing regular inspections, the dam not only ensures public safety but also underscores the importance of proactive risk management in the face of changing climatic conditions.