Net coal thickness in the Hanna 77, 78, 79 and 81 coal zones of Hanna Basin, Wyoming (ha*catg)
These ArcView shapefiles contain representations of the net coal thickness in the Hanna 77, 78, 79 and 81 coal zones, Hanna coalfield, Hanna Basin, Wyoming.  These datasets were created specifically for the National Coal Resource Assessment in the Northern Rocky Mountains and Great Plains Region.