Isham Dam, located in Sheridan, Nebraska, is a privately owned structure designed by the USDA NRCS with a primary purpose of irrigation. Completed in 1953, this earth dam stands at 26 feet high with a hydraulic height of 24 feet and a length of 502 feet. It has a storage capacity of 619.4 acre-feet and serves an area with a drainage area of 11.17 square miles.

Despite its low hazard potential, Isham Dam's condition assessment is rated as poor as of October 2017. The dam is inspected every 5 years, with the last inspection conducted in 2017. It is regulated by the Nebraska Department of Natural Resources and has state permitting, inspection, and enforcement in place. The dam's location along TR-BEAVER CREEK makes it a crucial resource for irrigation in the region.

For water resource and climate enthusiasts, Isham Dam presents an interesting case study in the management and maintenance of vital water infrastructure. With its historical significance and ongoing challenges in maintenance, the dam serves as a reminder of the importance of sustainable water management practices in the face of changing climate conditions. Its association with the USDA NRCS and state regulatory agencies underscores the collaborative efforts required to ensure the safety and efficiency of water resources in Nebraska.