North Oak Creek 6-C is a flood risk reduction structure located in Valparaiso, Nebraska, designed by the USDA NRCS and completed in 1977. This earth dam stands 47 feet high, with a hydraulic height of 45 feet and a length of 793 feet. It serves the primary purpose of flood risk reduction for the North Oak Creek, offering a storage capacity of 867 acre-feet and a normal storage of 276 acre-feet over a drainage area of 3.1 square miles. The dam has a low hazard potential and is in satisfactory condition as of the last assessment in September 2019.

Managed by the Nebraska Department of Natural Resources, North Oak Creek 6-C is subject to state regulation, permitting, inspection, and enforcement. Perched in Butler County, the structure plays a crucial role in mitigating flood risks and protecting the surrounding area. With a maximum discharge capacity of 724 cubic feet per second, this dam contributes to the overall water resource management in the region. Despite its low hazard potential, the dam is regularly monitored and inspected to ensure its continued effectiveness in flood control.

The location of North Oak Creek 6-C, along with its design and construction by the Natural Resources Conservation Service, highlights the collaborative efforts to manage water resources and address climate-related challenges in Nebraska. As a key component in the flood risk reduction infrastructure, this earth dam serves as a vital resource for the community and underscores the importance of proactive measures in safeguarding against potential water-related disasters. The structure's history, specifications, and operational details underscore its significance in water resource management and climate resilience efforts in the region.