Welcome to Pennsylvania Department of Environmental Protection's PHUMMIS (Pennsylvania Historic Underground Mine Map Inventory System) web site.





Legal Disclaimer

This database contains information relevant to past and present underground mining within the Commonwealth of Pennsylvania, including, but not limited to, maps, indices, locations of mines, and other pertinent data contained in various collections held or obtained by the Pennsylvania Department of Environmental Protection’s (Department) Office of Active and Abandoned Mine Operations. The information contained in this database has been compiled from various sources, and as a result, the Department cannot guarantee the accuracy, completeness, or veracity of the information in the database or the information that is generated by a search of the database by a user. The Department assumes no responsibility for the accuracy, completeness, or veracity of information contained in the database. The Department disclaims any responsibility for any actions, or the lack thereof, taken in reliance on the information contained in the database. The user agrees that the Department, its employees, officers, agents, or contractors will not be liable for any damages or losses of any kind resulting directly or indirectly from the use of, or reliance on, the information contained in the database.