Upper Big Nemaha 13-C is a local government-owned earth dam located in Lancaster, Nebraska, along the TR-MID BR Big Nemaha River. Constructed in 1994 by the USDA NRCS, this dam stands at a height of 30 feet with a hydraulic height of 28 feet and a structural height of 35 feet. With a storage capacity of 594 acre-feet and a drainage area of 1.7 square miles, the dam serves multiple purposes including flood risk reduction. The dam's condition was last assessed in June 2016 and was found to be in satisfactory condition with a low hazard potential.

Managed by the NE DNR, Upper Big Nemaha 13-C undergoes regular inspections every 5 years to ensure its structural integrity and functionality. Despite being classified as low risk, the dam has a maximum discharge capacity of 577 cubic feet per second and a normal storage capacity of 114 acre-feet. The dam's location in Firth, Nebraska, makes it a critical infrastructure for water resource management in the area. With a stone core and soil foundation, Upper Big Nemaha 13-C plays a crucial role in regulating water flow and mitigating potential flood risks.

As part of the Natural Resources Conservation Service's network of dams, Upper Big Nemaha 13-C contributes to the overall water management strategy in the region. With its earth construction and satisfactory condition, the dam provides valuable insights into sustainable water resource management practices. Climate and water resource enthusiasts can appreciate the importance of structures like Upper Big Nemaha 13-C in maintaining the ecological balance and ensuring water security in the face of changing climate patterns.