Scope and Content Series I. Scanned rolls, 1891-1992, contain 3475 maps in 261 boxes, totalling approximately 135 cu. ft. Most of these rolls are mining or mine survey maps, and when possible, the maps are identified with title, company, coalbed, mine name, county, state, USGS quadrangle, dates, and notes. Related scanned rolls are identified by CON number, and some related items are unscanned and identified in Series II. The items in this series have been scanned, and their digital file ids are the CON#...