Cox Dam 1-A (Modified) is a private earth dam located in Cherry County, Nebraska, near the city of Brewster. Built in 1955 by the USDA NRCS, this dam serves the primary purpose of irrigation along the Calf Creek. With a height of 10 feet and a storage capacity of 119.6 acre-feet, the dam plays a crucial role in managing water resources in the region.

Despite its importance, Cox Dam 1-A (Modified) is currently assessed as being in poor condition, with a low hazard potential. The last inspection in May 2012 revealed the need for significant maintenance and improvements. The Nebraska Department of Natural Resources regulates and inspects the dam, ensuring its compliance with state requirements for safety and operation.

As water resource enthusiasts, it is crucial to monitor and advocate for the maintenance and rehabilitation of infrastructure like Cox Dam 1-A (Modified) to ensure the sustainable management of water resources in the area. By working with regulatory agencies and stakeholders, efforts can be made to address the dam's poor condition and improve its functionality for irrigation and flood control along the Calf Creek watershed.