Acreages within various characteristic layers stratified by Inventoried Roadless Area categories within Montana. |
All acreage figures are rounded to the nearest 1,000. | | | | | | |
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Montana | 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) | | 1,729 | | 824 | | 3,844 | | 6,397 | |
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FIRE CONDITION CLASS | | acres* (1,000) | % | | acres* (1,000) | % | | acres* (1,000) | % | | acres* (1,000) | |
Condition Class 1 | | | | 545 | 32 | | 237 | 29 | | 1,026 | 27 | | 1,808 | |
Condition Class 2 | | | | 565 | 33 | | 335 | 41 | | 1,464 | 38 | | 2,364 | |
Condition Class 3 | | | | 503 | 29 | | 227 | 28 | | 1,107 | 29 | | 1,837 | |
Non-Vegetation | | | | | 0 | | | 0 | | | 0 | | | |
Agriculture | | | | 26 | 2 | | 3 | 0 | | 35 | 1 | | 64 | |
Urban/Development/Agriculture | | 88 | 5 | | 21 | 3 | | 208 | 5 | | 317 | |
Water | | | | | 0 | | | 0 | | 4 | 0 | | 4 | |
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FIRE REGIMES | | | | | | | | | | | | |
0-35 yrs; Low Severity | | | 135 | 8 | | 48 | 6 | | 188 | 5 | | 371 | |
0-35 yrs; Stand Replacement | | | 3 | 0 | | 6 | 1 | | 31 | 1 | | 40 | |
35-100 yrs; Mixed Severity | | | 776 | 45 | | 378 | 46 | | 2,083 | 54 | | 3,237 | |
35-100 yrs; Stand Replacement | | 691 | 40 | | 271 | 33 | | 1,372 | 36 | | 2,334 | |
200 + yrs; Stand Replacement | | 121 | 7 | | 121 | 15 | | 165 | 4 | | 407 | |
Barren | | | | | 0 | | | 0 | | | 0 | | | |
Water | | | | | 0 | | | 0 | | 4 | 0 | | 4 | |
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MORTALITY | | | | | | | | | | | | |
Risk of Mortality Not Present | | | 1,158 | 67 | | 475 | 58 | | 2,521 | 66 | | 4,154 | |
Risk of Mortality Present | | | 570 | 33 | | 349 | 42 | | 1,322 | 34 | | 2,241 | |
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LAND COVER CLASS | | | | | | | | | | | | |
Deciduous Forest | | | | 22 | 1 | | 21 | 3 | | 61 | 2 | | 104 | |
Evergreen Forest | | | | 1,547 | 90 | | 765 | 93 | | 3,459 | 90 | | 5,771 | |
Mixed Forest | | | | | 0 | | | 0 | | | 0 | | | |
Shrub-Brush Rangeland | | | | 0 | | 2 | 0 | | 8 | 0 | | 10 | |
Rangeland | | | | 38 | 2 | | 8 | 1 | | 65 | 2 | | 111 | |
Wetland | | | | | 0 | | | 0 | | | 0 | | | |
Tundra | | | | 5 | 0 | | 2 | 0 | | 8 | 0 | | 15 | |
Urban/Development/Agriculture | | 114 | 7 | | 26 | 3 | | 242 | 6 | | 382 | |
Barren Land | | | | | 0 | | | 0 | | | 0 | | | |
Water | | | | | 0 | | | 0 | | 4 | 0 | | 4 | |
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PROTECTED AREA DATABASE | | | | | | | | | | | | |
GAP Code 1 | | | | 26 | 2 | | 18 | 2 | | 15 | 0 | | 59 | |
GAP Code 2 | | | | 92 | 5 | | 622 | 75 | | 31 | 1 | | 745 | |
GAP Code 3 | | | | 1,521 | 88 | | 181 | 22 | | 3,736 | 97 | | 5,438 | |
Outside of PAD | | | | 90 | 5 | | 3 | 0 | | 61 | 2 | | 154 | |
* 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. | | |
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