Mission Creek 3-A is a vital water resource infrastructure located in Gage, Nebraska, designed by USDA NRCS to address flood risk reduction along the TR-Mission Creek. Completed in 1977, this earth dam stands at a height of 38 feet, with a hydraulic height of 37 feet and a structural height of 40 feet. With a storage capacity of 991 acre-feet, it serves the primary purpose of flood risk reduction, providing protection to the surrounding area against potential inundation.

Managed by the local government and regulated by the Nebraska Department of Natural Resources, Mission Creek 3-A has a low hazard potential with a satisfactory condition assessment as of May 2016. It covers a drainage area of 2.6 square miles and has a normal storage capacity of 152 acre-feet, contributing to the overall water management strategy in the region. Despite the absence of spillways or outlet gates, the dam's design and construction ensure its functionality in mitigating flood risks and maintaining water supply stability in the area.

With its strategic location and operational effectiveness, Mission Creek 3-A remains a crucial component of the water resource infrastructure in Nebraska. Supported by the Natural Resources Conservation Service, this earth dam continues to play a significant role in safeguarding the community and enhancing water management practices along the Mission Creek. Its historical significance and ongoing maintenance highlight the importance of sustainable water resource management in the face of evolving climate challenges.