Black Hills Mining Museum Architectural styleIndustrialNRHP referenceNo. It was the last working underground mine in New Jersey when it closed in 1986. Along with the nearby Franklin Mine, it's known for its variety of minerals, especially the fluorescent varieties. It was added to the National Register of Historic Places http://ricardoepv2b.blog5star.com/7608702/definition-of-musculoskeletal-disorder