Upper Clear Creek 1-C is a privately owned earth dam located in Polk, Nebraska, designed by the USDA NRCS in 1963 for irrigation purposes. The dam stands at 26 feet high with a storage capacity of 308 acre-feet and serves a drainage area of 2.4 square miles. Despite its low hazard potential, the dam's condition is assessed as poor, indicating a need for maintenance and repair.

Managed by the Nebraska Department of Natural Resources, Upper Clear Creek 1-C is subject to state regulations, inspections, and enforcement. The dam's last inspection in May 2018 revealed its poor condition, highlighting the importance of regular maintenance to ensure its structural integrity and safety. With a hydraulic height of 21 feet and a maximum discharge capacity of 1,175 cubic feet per second, the dam plays a crucial role in supporting agricultural irrigation in the region.

Located in the vicinity of TR-Clear Creek, Upper Clear Creek 1-C is a vital water resource infrastructure in the area. As water resource and climate enthusiasts, it is essential to monitor and support the maintenance and upkeep of dams like Upper Clear Creek 1-C to safeguard water supply and mitigate potential risks associated with aging infrastructure.