Helmink Dam, located in Firth, Nebraska, is a privately owned structure that serves multiple purposes, including flood risk reduction. Completed in 2000, this earth dam stands at a height of 21 feet and has a hydraulic height of 20 feet, providing a maximum storage capacity of 186 acre-feet. With a satisfactory condition assessment as of April 2018, Helmink Dam plays a crucial role in managing water resources in the area.

Situated on the TR-MID BR BIG NEMAHA RIVER, Helmink Dam is regulated by the Nebraska Department of Natural Resources, with state enforcement, permitting, and inspection processes in place to ensure its safe operation. Its significant hazard potential underscores the importance of proper maintenance and monitoring to mitigate risks. With a drainage area of 0.4 square miles and a maximum discharge of 485 cubic feet per second, Helmink Dam contributes to the overall water management strategy for Lancaster County and the surrounding areas.

As an essential component of the water infrastructure, Helmink Dam plays a vital role in protecting the local community from flood events and ensuring a reliable water supply. With its stone core and soil foundation, this earth dam is designed to withstand the pressures of water flow while maintaining its structural integrity. Regular inspections and a satisfactory condition assessment demonstrate the commitment to safety and effective management of this critical water resource asset in Nebraska.