Waste House No 1 is a historic earth dam located in Mahanoy Township, Pennsylvania, that was completed in 1884 for water supply purposes. This dam, standing at a height of 57 feet and spanning a length of 410 feet, holds a normal storage capacity of 176.4 acre-feet in the Wastehouse Run. Operated by the Pennsylvania Department of Environmental Protection and regulated by the state, Waste House No 1 is crucial for maintaining water resources in Schuylkill County.

Despite its age, Waste House No 1 is in satisfactory condition according to the last inspection in November 2020, with a high hazard potential due to its location. The dam has a spillway width and outlet gate information that is unlisted, and its associated structures are currently not applicable. With a drainage area of 0.95 square miles, Waste House No 1 serves as a vital component of the water supply infrastructure in the region, highlighting the importance of maintaining and monitoring its integrity for water resource and climate enthusiasts.

Overall, Waste House No 1 stands as a testament to the historical significance of water resource management in Pennsylvania, with its enduring presence serving as a reminder of the essential role dams play in ensuring water supply for communities. As climate change continues to impact water resources, the proper regulation and maintenance of structures like Waste House No 1 are crucial to safeguarding the environment and meeting the water needs of the future.