Thompson Dam 4174, located in Sarpy, Nebraska, is a privately owned earth dam that was completed in the year 2000 for the primary purpose of flood risk reduction along the TR-Platte River. With a height of 34.5 feet and a length of 635 feet, the dam has a storage capacity of 175.6 acre-feet and covers a surface area of 4.5 acres. Despite its low hazard potential, the dam's condition assessment is rated as poor, highlighting the need for maintenance and improvement to ensure its effectiveness in mitigating flood risks.

Managed by the Nebraska Department of Natural Resources, Thompson Dam 4174 is subject to state regulation, permitting, inspection, and enforcement to maintain safety standards and compliance with regulatory requirements. The dam stands in Congressional District 02, Nebraska, with Representative Don Bacon (R) serving the area. Despite its structural deficiencies, the dam has not been modified in recent years, raising concerns about its ability to withstand potential flooding events. Emergency action plans and risk assessments for the dam are currently unavailable, emphasizing the importance of proactive measures to address safety concerns and ensure proper management of the water resource.

As a significant component of flood risk management in the region, Thompson Dam 4174 plays a crucial role in protecting the surrounding area from potential inundation. However, the dam's poor condition assessment underscores the need for immediate attention to address structural vulnerabilities and enhance its capacity to withstand future flood events. Collaboration between stakeholders, regulatory agencies, and the private owner is essential to develop and implement strategies to improve the dam's safety and effectiveness in mitigating flood risks for the community and the environment.