Upper Big Nemaha 14-A, located in Lancaster, Nebraska, is a local government-owned earth dam designed by USDA NRCS to primarily manage flood risk along the TR-MID BR Big Nemaha River. Completed in 1983, this dam stands at a height of 21 feet and has a hydraulic height of 20 feet, providing a storage capacity of 210 acre-feet. With a satisfactory condition assessment and low hazard potential, this structure plays a crucial role in flood risk reduction in the region.

Managed by the Nebraska Department of Natural Resources, Upper Big Nemaha 14-A is subject to state regulation, inspection, and enforcement to ensure its structural integrity and operational effectiveness. The dam's drainage area spans 0.5 square miles, with a maximum discharge capacity of 665 cubic feet per second. With a history of regular inspections and a last assessment in September 2016, this dam has shown a reliable performance in safeguarding the surrounding area from potential flooding events.

Despite its modest size and localized impact, Upper Big Nemaha 14-A serves as a vital component of the flood management infrastructure in the region. With its stone core and soil foundation, this earth dam reflects a successful collaboration between federal agencies, local government, and regulatory bodies to enhance resilience to climate-related risks and protect the community from potential water-related disasters.