Cook Dam, located in Niobrara, Nebraska, is a privately owned structure primarily used for irrigation purposes. Built in 1951 by USDA NRCS, this earth dam stands at a height of 30 feet with a length of 525 feet, offering a storage capacity of 22 acre-feet. Despite its importance for water resource management, the dam's condition has been assessed as poor, indicating a need for maintenance and potential upgrades to ensure its long-term functionality.

Managed by the Nebraska Department of Natural Resources, Cook Dam is regulated, permitted, inspected, and enforced by state authorities to maintain safety standards. The dam poses a low hazard potential, but its poor condition raises concerns and highlights the importance of regular inspections and potential risk management measures. With a drainage area of 0.5 square miles and a maximum discharge capacity of 620 cubic feet per second, Cook Dam plays a crucial role in water management for the surrounding area.

In recent years, Cook Dam has undergone inspections every five years, with the last assessment conducted in April 2016. While the dam meets state regulatory requirements, its poor condition warrants attention to prevent potential safety hazards and ensure its continued functionality for irrigation purposes. As a key structure along the Niobrara River, Cook Dam serves as a vital water resource for the region, highlighting the importance of maintaining and monitoring such infrastructure in the face of changing climate conditions.