Winnemucca Lagoon Dam #5, located in Lovelock, Nevada, is a vital water resource structure managed by the local government. Completed in 1970, this earth dam stands at a height of 7 feet and serves multiple purposes, with a primary focus on water management. The dam has a storage capacity of 70 acre-feet, with a normal storage level of 51 acre-feet, and covers a surface area of 6.4 acres.

Despite being categorized as having a low hazard potential, the dam's condition assessment in 2021 was deemed fair. With a risk assessment rating of 2 (high), the structure has undergone modifications in 1990 to enhance its hydraulic and structural capabilities. The dam is inspected every 5 years to ensure its safety and functionality, with the most recent inspection conducted in September 2021. With no spillway and a maximum discharge of 0, Winnemucca Lagoon Dam #5 remains a crucial component of the Humboldt River-OS system in Humboldt County, Nevada, serving as a key water resource for the region.