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| Table 6-3 | |
| U.S. Forest Service National Wilderness Preservation System Acreage, in Idaho, the Region, and the U.S., Selected Years, 1975-1991 (in 1,000 Acres) | |
| Idaho | Alaska | Montana | Nevada | Oregon | Utah | Washington | Wyoming | U.S. | |
| 1975 | 1,205 | - | 1,796 | 65 | 842 | - | 1,085 | 1,987 | 11,514 |
| 1977 | 1,285 | - | 1,792 | 65 | 951 | - | 1,390 | 1,178 | 12,595 |
| 1979 | 1,490 | - | 3,088 | 65 | 1,212 | 30 | 1,501 | 2,193 | 15,300 |
| 1980 | 3,825 | 5,362 | 3,107 | 65 | 1,223 | 30 | 1,501 | 2,194 | 25,133 |
| 1983 | 3,825 | 5,453 | 3,107 | 65 | 1,214 | 30 | 1,501 | 2,193 | 25,228 |
| 1984 | 3,827 | 5,453 | 3,366 | 65 | 2,077 | 780 | 2,521 | 3,086 | [1]32,089 |
| 1985 | 3,827 | 5,453 | 3,366 | 65 | 2,077 | 780 | 2,521 | 3,086 | 32,102 |
| 1986[2] | 3,957 | 5,453 | 3,371 | 65 | 2,078 | 780 | 2,573 | 3,081 | 32,369 |
| 1987[2] | 3,960 | 5,453 | 3,372 | 65 | 2,078 | 775 | 2,571 | 3,081 | 32,457 |
| 1988[2] | 3,960 | 5,453 | 3,372 | 65 | 2,078 | 775 | 2,571 | 3,081 | 32,534 |
| 1989[2] | 3,960 | 5,453 | 3,372 | 65 | 2,079 | 774 | 2,571 | 3,080 | 32,540 |
| 1990[2] | 3,960 | 5,453 | 3,372 | 788 | 2,080 | 774 | 2,571 | 3,080 | 33,255 |
| 1991[2] | 3,960 | 5,753 | 3,372 | 788 | 2,080 | 774 | 2,571 | 3,080 | 33,579 |
| Source: | U.S. Forest Service, Report of the Forest Service, various years. |
| Note: | Acreages are estimated pending final map compilation; minor changes may occur from year to year. Years in which no changes have occurred have been omitted to avoid redundancy. |
| [1] | Includes all acres added to the Wilderness Preservation System through the end of the 98th Congress. |
| [2] | Includes all changes to the Wilderness Preservation System through the 100th Congress. |
Compiled by: Richard C. Davis, data input assisted
by: Robert Anton-Erik
Contact: Lily Wai
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