This dataset is a polygon coverage of counties limited to the extent of the Pocahontas No. 3 coal bed resource areas. The eastern limit of the coal bed is along the Allegheny structural front, where the bed is either folded to vertical, overturned to the northwest, or covered by thrust sheets in the western part of the Valley and Ridge Province. The western limit of minable coal is in the subsurface and was selected at the 14-inch isoline. The file has been generalized from detailed geologic coverages found elsewhere in Professional Paper 1625-C.