Simonsen Dam, located in Nuckolls, Nebraska, is a privately owned structure primarily used for irrigation purposes. Built in 1963 by the USDA NRCS, this earth dam stands at a height of 19 feet and has a total length of 425 feet. With a maximum storage capacity of 147 acre-feet and a normal storage of 51 acre-feet, Simonsen Dam plays a crucial role in providing water resources for agricultural activities in the area.

Managed by the Nebraska Department of Natural Resources, Simonsen Dam is subject to state regulation, inspection, and enforcement to ensure its safety and functionality. Despite being classified as having a low hazard potential, the dam is rated as being in fair condition as of the last assessment in April 2020. Its proximity to TR-SPRING CREEK and its location within the Omaha District of the US Army Corps of Engineers further highlight the importance of Simonsen Dam in the region's water resource management and climate resilience efforts.

With a drainage area of 0.5 square miles and a maximum discharge capacity of 440 cubic feet per second, Simonsen Dam serves as a critical infrastructure for water control and management in the region. As climate change continues to impact water resources, the proper maintenance and regulation of dams like Simonsen Dam are essential to ensure the sustainable use of water for irrigation and other purposes in Nebraska.