Nielsen Dam 429, located in Kearney, Nebraska, is a private earth dam primarily used for irrigation purposes. Constructed in 1970 by the USDA NRCS, this dam stands at a height of 15 feet with a structural height of 16 feet, providing storage for 59 acre-feet of water. With a low hazard potential and fair condition assessment, the dam spans 510 feet in length and covers a surface area of 6 acres, serving the local community's agricultural water needs.

Managed by the Nebraska Department of Natural Resources, Nielsen Dam 429 is regulated, permitted, inspected, and enforced by state agencies to ensure its safe operation. The dam's drainage area is 0.5 square miles, with a maximum discharge capacity of 185 cubic feet per second. Despite its modest size, the dam plays a vital role in water resource management in the region and contributes to the overall irrigation infrastructure.

With Adrian Smith representing the area in Congress, Nielsen Dam 429 remains an essential component of the local water supply system, serving as a key feature in the landscape of the Sand Creek watershed. As water resource and climate enthusiasts continue to monitor and assess dam safety and efficiency, Nielsen Dam 429 stands as a testament to responsible water management practices and the importance of maintaining critical infrastructure for agricultural sustainability in Nebraska.