Acreages within various characteristic layers stratified by Inventoried Roadless Area categories within Alaska.
All arcreage figures are rounded to the nearest 1,000.
Alaska			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)				8,479			1,638			4,661			14,779
FIRE CONDITION CLASS				acres* (1,000)	%		acres* (1,000)	%		acres* (1,000)	%		acres* (1,000)
Condition Class 1
Condition Class 2
Condition Class 3
Non-Vegetation			NO FIRE CONDITION CLASS INFORMATION AVAILABLE FOR ALASKA
Agriculture
Urban/Development/Agriculture
Water
FIRE REGIMES
0-35 yrs; Low Severity
0-35 yrs; Stand Replacement
35-100 yrs; Mixed Severity
35-100 yrs; Stand Replacement			NO FIRE REGIMES INFORMATION AVAILABLE FOR ALASKA
200 + yrs; Stand Replacement
Barren
Water
MORTALITY
Risk of Mortality Not Present				8,369,000	99		1,638,000	100		4,605,000	99
Risk of Mortality Present				110,000	1		0	0		56,000	1
LAND COVER CLASS
Deciduous Forest
Evergreen Forest
Mixed Forest
Shrub-Brush Rangeland
Rangeland
Wetland			NO LAND COVER CLASS INFORMATION AVAILABLE FOR ALASKA
Tundra
Urban/Development/Agriculture
Barren Land
Water
PROTECTED AREA DATABASE
GAP Code 1				263,000	3		0	0		14,000	0
GAP Code 2				0	0		0	0		5,000	0
GAP Code 3				7,131,000	84		1,527,000	93		3,990,000	86
Outside of PAD				1,077,000	13		111,000	7		657,000	14
* 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 multiply percent-area and total acreages from the Inventoried Roadless Area coverage.  Derived acres have been rounded to the nearest 1,000 acres.