Cresswell Lower is a privately owned earth dam located in Mercer, Pennsylvania, within Sandy Creek Township. Built in 2002, this dam serves primarily for recreational purposes, with a storage capacity of 15 acre-feet and a surface area of 2.4 acres. Situated on TR Morrison Run, this dam stands at a height of 15 feet and is regulated by the Pennsylvania Department of Environmental Protection.

Despite being designed for recreation, Cresswell Lower poses a significant hazard potential and has not been rated for its condition assessment. The last inspection conducted in October 2017 revealed an inspection frequency of 2 and highlighted the need for ongoing monitoring and maintenance. While the dam has not been modified in recent years, its emergency action plan status, risk assessment, and risk management measures remain unknown.

As a water resource and climate enthusiast, the data on Cresswell Lower's dam structure offers insight into the complexities of managing and regulating dams for recreational use. The significant hazard potential calls for increased attention to its maintenance and emergency preparedness, emphasizing the importance of ensuring the safety and sustainability of water resources in the face of changing climate patterns.