Unioned layer of coal resource calculation in the southern Piceance Basin, Colorado (ps*fing)

These are shapefiles and coverages of final unioned polygon
coverages used to calculate coal resources of the
Cameo/Fairfield coal group east of 107 deg 15' longitude,
and the Cameo/Wheeler, South Canyon, and Coal Ridge coal
zones west of 107 deg 15' longitude in the southern Piceance
Basin, northwestern Colorado. Pscbfing was used for the area
east of 107 deg 15' longitude; pscwfing was used for the
Cameo/Wheeler coal zone; psscfing was used for the South
Canyon coal zone; pscrfing was used for the Coal Ridge coal
zone. Polygons that make up the final unioned polygons
include counties, 7.5' quadrangles, townships, surface and
coal ownership, reliability, and, overburden.
The final unioned coverage for each coal zone, was clipped
by the resource boundary polygon of each coal zone.