Ott Dam 1165, located in Harlan County, Nebraska, was completed in 1972 by the USDA NRCS and serves as a crucial water resource for fire protection, stock, and small fish pond purposes. The earth dam stands at 16 feet high and stretches 329 feet in length, with a storage capacity of 62 acre-feet. Despite being classified as low hazard potential, the dam's condition assessment was deemed unsatisfactory during its last inspection in June 2019.

Managed by a private owner, Ott Dam 1165 is regulated by the Nebraska Department of Natural Resources and undergoes regular state inspections, enforcement, and permitting. The dam's primary designer, the USDA NRCS, used buttress and stone core types on a soil foundation to create the structure. The dam is situated on TR-EUREKA CREEK, within the jurisdiction of the state and city of Republican City, offering essential water resources for the surrounding area.

While Ott Dam 1165 plays a vital role in water management and conservation efforts in the region, its unsatisfactory condition assessment highlights the importance of ongoing maintenance and monitoring to ensure the safety and reliability of this essential water resource infrastructure for fire protection, stock, and small fish pond purposes in Nebraska.