Old Mines Limestone Mine Hosts Second ‘Subsurface’ Art Event By Bill O'Driscoll • Dec 4, 2018 Photo by Alisa Garin / Courtesy of Carnegie Mellon University Pittsburgh is familiar with unusual venues for music and performance art. Over the years, it’s seen art rock in a junkyard, and theater both on a river barge and in an empty swimming pool. Subsurface was likely a milestone, though. The Carnegie Mellon University event last year was probably the first ever around here held in the labyrinth-like setting of a limestone mine. Abandoned Mines Across State To Get $55M In Cleanup Money By Reid Frazier | StateImpact Pennsylvania • May 9, 2018 Reid Frazier / StateImpact Pennsylvania The Pennsylvania Department of Environmental Protection will spend $55 million on abandoned mine cleanup projects around the state.