Description: Polygons representing buffered areas above, adjacent to, or affected by old underground mine facilities that have a potential for subsidence in unincorporated Pierce County. Please read metadata for additional information (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbplan_potential_mine_hazard_areas.html). Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf).