Willow Lake, located in Sanpete County, Utah, is a privately owned water supply reservoir completed in 1978 by the USDA NRCS. With a storage capacity of 226 acre-feet, the dam stands at a height of 12 feet and has a hydraulic height of 8 feet. The primary purpose of the dam is for water supply, serving the local community in FERRON and surrounding areas.

Managed by the Utah Division of Water Rights, Willow Lake is regulated and inspected regularly to ensure its safety and compliance with state regulations. The dam has been classified as having a significant hazard potential, requiring inspections every two years. Despite not having a current condition assessment rating, the reservoir plays a crucial role in water resource management in the region and provides a reliable water source for agricultural and domestic use.

As a key structure in the Sacramento District, Willow Lake contributes to the overall water management efforts in Utah. With its strategic location and essential role in water supply, the reservoir serves as a vital resource for local communities and underscores the importance of sustainable water practices in the face of climate change and increasing water demand.