INFO file:  COCODE.DAT

Source:  U.S. Census 

Items:

FIPS       County FIPS code

CO_CODE    Designates SAA subregions, 
           where the values are:

1 = Northern Blue Ridge           (or Northern Ridge and Valley)
2 = Southern Blue Ridge           (or Blue Ridge)
3 = Ridge & Valley                (or Southern Ridge and Valley)
4 = Southern Mountains and Piedmont  

Contact:  Clair Redmond
          US Forest Service
          1720 Peachtree Road, NW
          Atlanta, GA   30367
          (404)-347-5264