Nielson (John) is a private water supply dam located in Emery, Utah, with a significant hazard potential. Managed by the Utah Division of Water Rights, this off-channel dam stands at a hydraulic height of 32 feet and a structural height of 36 feet, with a storage capacity of 180 acre-feet. Completed a number of years ago, this earth dam spans 430 feet in length and serves as a vital resource for the surrounding area.

Despite its critical role in water supply, Nielson (John) has not been rated for its condition, and the last inspection in September 2020 revealed that it was not assessed. The dam poses a significant risk, although specific risk management measures have not been outlined. With a regulated state jurisdiction and permitting, inspection, and enforcement in place, this dam remains a focal point for water resource enthusiasts interested in the management and maintenance of essential infrastructure in the region.

As a key element of the water supply infrastructure in Emery County, Utah, Nielson (John) represents a blend of private ownership and state oversight. With a capacity to hold 180 acre-feet of water and a history of state-regulated operations, this dam underscores the importance of maintaining and managing water resources in a region susceptible to climate variability. Enthusiasts interested in the intersection of water resources and climate change will find Nielson (John) a compelling case study in the ongoing efforts to secure sustainable water supplies for the future.