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2018-01-03_PERMIT FILE - C1981010A (12)
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2018-01-03_PERMIT FILE - C1981010A (12)
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Last modified
1/4/2023 2:28:36 PM
Creation date
3/9/2018 6:59:29 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981010A
IBM Index Class Name
Permit File
Doc Date
1/3/2018
Doc Name
pages 2-58 to 2-169
Section_Exhibit Name
2.3 Vegetation & 2.4 Fish and Wildlife
Media Type
D
Archive
Yes
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• 7200 feet (range site A) the condition rating was poor. On the south and west aspects (range <br />site B) a fair condition was noted. Map M17 gives an historical Utah International available <br />domestic grazing visual. <br />The big sagebrush -grass vegetation type has a total of 1,296 animal unit months (AUM) available <br />for grazing over 2,964 acres. This value is one-half of the total CAG available and represents the <br />current practice in use by the Bureau of Land Management (BLM) of "take half -leave half" (Table <br />2.3-23). <br />From this data, based on an intensive six month, season long grazing program, 928 sheep could <br />be grazed in the big sagebrush -grass association without overuse (4.3 ewes, each with one Iamb, <br />will consume 804 pounds of forage per month (Cook, 1970)). Generally, this area will receive <br />only spring and fall grazing. <br />With minor exceptions, most of the big sagebrush -grass type available for grazing lies to the <br />north and to the west of the proposed permit area. As a result, this type will only be moderately <br />impacted from mining and reclamation operations from 1980 on. The biggest impact will be to <br />• the mountain shrub type. Mining and reclamation operations will principally occur in the mountain <br />shrub type beginning in 1980. The greatest temporary losses to grazing by domestic livestock <br />will be within this type. <br />Within the total mountain shrub vegetation type, Trapper Mine presently has 3,209 acres <br />available for domestic grazing. Based on 1980 data, a total of 1,469 animal unit months (AUM's) <br />are available for domestic grazing use. The available acreage within the mountain shrub type will <br />increase to include the remainder of the mine plan area in 1983. In 1983, the present purchase <br />agreements for lands owned by Trapper Mine on the eastern one-third of the mine plan area will <br />expire. At that time, Trapper will then have full control of domestic grazing for all lands within and <br />adjacent to the mine plan area (see Surface Ownership Map M1. AUM's are based on one-half <br />of the total CAG available as estimated from 1980 data (Table 2.3-23). <br />In the mountain shrub type, the range site with the most area available for domestic grazing is <br />range site A. This range site has a total of 2,255 acres under <br />2-120 <br />
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