Kennecott Mill Zone IV Retention is a private water retention structure located in South Jordan, Utah, along the South Fork Barneys Canyon river. Regulated by the Utah Division of Water Rights, this retention pond serves the primary purpose of flood risk reduction. With a hydraulic height of 25 feet and a storage capacity of 100 acre-feet, this Earth-type dam plays a crucial role in mitigating potential flooding in the area.

Despite being classified as having a low hazard potential, Kennecott Mill Zone IV Retention is subject to regular inspections by the Mine Safety and Health Administration. The last inspection took place in October 2020, with a scheduled inspection frequency of every 5 years. The structure's condition is currently not rated, highlighting the need for ongoing monitoring and maintenance to ensure its effectiveness in flood risk reduction.

While lacking certain details such as the year of completion and dam volume, Kennecott Mill Zone IV Retention remains a vital infrastructure for managing water resources in the Salt Lake County area. As climate change continues to impact precipitation patterns and increase the frequency of extreme weather events, structures like this play a critical role in safeguarding communities from potential flood risks.