National Mining Hall Of Fame And Museum In September, 2013, work started on a 3-story addition to the Mining Heritage Center. The addition now houses exhibit area, a new wooden and steel store, and curation and restoration space for working on our collections, and much wanted storage space. Our http://2074103.blogs100.com/7758186/how-to-reduce-your-exposure-to-diesel-exhaust-pollution-and-protect-your-health