Pole Run No 4 is a significant structure located in Mahanoy Township, Schuylkill County, Pennsylvania, managed by the local government for water supply purposes. Built in 1877, this earth dam stands at a height of 41.5 feet, with a storage capacity of 192 acre-feet. The dam overlooks the Pole Run river and has a drainage area of 0.58 square miles, serving as a vital resource for the surrounding community.

Despite its age, Pole Run No 4 has undergone modifications in 2004 and 2009 to ensure its continued functionality and safety. The dam has a high hazard potential but is currently assessed as being in satisfactory condition. Regular inspections are conducted, with the last one taking place in November 2020, to monitor its structural integrity and address any potential risks. The Pennsylvania Department of Environmental Protection oversees the regulatory aspects of the dam, including permitting, inspection, and enforcement, ensuring compliance with state guidelines.

For water resource and climate enthusiasts, Pole Run No 4 represents a historical and essential infrastructure that plays a crucial role in providing water supply to the local community. Its presence highlights the importance of proper dam management and maintenance to ensure the safety and sustainability of water resources in the region. As climate change continues to impact water availability and distribution, structures like Pole Run No 4 serve as vital assets in managing and conserving this precious resource for future generations.