Acreages within various characteristic layers stratified by Inventoried Roadless Area categories within Colorado.
All acreage figures are rounded to the nearest 1,000.
Colorado INVENTORIED ROADLESS AREA CATEGORIES SUM
  …that does not allow road construction and reconstruction   …that does not allow road construction and the Forest  Plan recommends wilderness   …that does allow road construction and reconstruction  
IRA Category acres (1,000)   925   11   3,498   4,433
       
FIRE CONDITION CLASS   acres* (1,000) %   acres* (1,000) %   acres* (1,000) %   acres* (1,000)
Condition Class 1     510 55   6 54   1,595 46   2,111
Condition Class 2     215 23   5 42   1,354 39   1,574
Condition Class 3     164 18     4   406 12   570
Non-Vegetation       0     0     0    
Agriculture     9 1     0   21 1   30
Urban/Development/Agriculture   27 3     0   122 4   149
Water         0     0     0    
 
FIRE REGIMES                      
0-35 yrs; Low Severity     270 29   2 15   1,011 29   1,283
0-35 yrs; Stand Replacement     6 1     0   77 2   83
35-100 yrs; Mixed Severity     165 18   4 36   1,042 30   1,211
35-100 yrs; Stand Replacement   18 2     0   38 1   56
200 + yrs; Stand Replacement   467 51   5 50   1,329 38   1,801
Barren       0     0     0    
Water         0     0     0    
 
MORTALITY                      
Risk of Mortality Not Present     917 99   11 100   3,400 97   4,328
Risk of Mortality Present     8 1     0   98 3   106
 
LAND COVER CLASS                      
Deciduous Forest     55 6     1   486 14   541
Evergreen Forest     676 73   9 87   2,508 72   3,193
Mixed Forest       0     0     0    
Shrub-Brush Rangeland     12 1     0   154 4   166
Rangeland       0     0   3 0   3
Wetland       0     0     0    
Tundra     145 16   1 12   199 6   345
Urban/Development/Agriculture   36 4     0   143 4   179
Barren Land       0     0     0    
Water         0     0     0    
 
PROTECTED AREA DATABASE                      
GAP Code 1     10 1   1 9   31 1   42
GAP Code 2     2 0     0   10 0   12
GAP Code 3     904 98   9 87   3,417 98   4,330
Outside of PAD       8 1     4   42 1   50
* These GIS overlays were prepared from coverages compiled at various scales and resolutions.  To account for the differences in scales and resolutions, a percent-area by attribute was calculated for each characteristic overlay layer.  The acres in each roadless category/characteristic attribute were calculated by multiplying percent-area and total acreages from the Inventoried Roadless Area coverage.  Derived acres have been rounded to the nearest 1,000 acres.