Nesquehoning 4th Hollow Reservoir, located in Nesquehoning Borough, Pennsylvania, is a crucial water supply reservoir owned by the local government. Completed in 1975, this Earth-type dam stands at a height of 51 feet and has a storage capacity of 148 acre-feet, with a normal storage of 80 acre-feet. The reservoir covers a surface area of 6 acres and serves the primary purpose of water supply for the surrounding area.

Managed by the Pennsylvania Department of Environmental Protection, the Nesquehoning 4th Hollow Reservoir has a fair condition assessment and a high hazard potential, indicating the importance of regular inspections and maintenance. The dam underwent structural modifications in 2007 to ensure its safety and stability. With a drainage area of 1.7 square miles and its location on Broad Run, the reservoir plays a vital role in managing water resources in Carbon County, Pennsylvania.

With its strategic location and significant storage capacity, the Nesquehoning 4th Hollow Reservoir is a key component of the water supply infrastructure in the region. Water resource and climate enthusiasts can appreciate the engineering feat of this dam, which not only provides essential water supply but also requires careful monitoring and management to ensure the safety of nearby communities. As climate change impacts water availability, reservoirs like Nesquehoning 4th Hollow play a critical role in sustaining water resources for the future.