2018-03-20_PERMIT FILE - C1981019A (2)

Home Browse Search

RJUX ova 9NNUT It since 1979 at 60% of carrying capacity. This rate would allow for an increased sagegrouse brood population over that which the area supported in an overgrazed condition. 4. Since 1976, numerous areas of thick, decadent stands of the mountain shrub vegetation within and adjacent to the lease area have been cleared of brush as part of the big game mitigation program. As a result of the brushing, the production of succulent herbaceous vegetation has increased, offering more forage for the sage grouse brood population. The above changes in Management practices of the rangeland around the Colowyo mining area contribute to the increased capability of supporting any displaced sage grouse nesting and brooding population. No additional treatments to mitigate for a displaced sage grouse population are in effect, nor would other methods likely be as effective. II. Post - mining Mitigation for Sage rg ouse As stated in the Permit Application, sage grouse use of the area to be mined is for nesting and brood rearing purposes. According to information contained within the Bureau of Land Management Technical Note #330, "Habitat Requirements and Management Recommendations for Sage Grouse," the most important factor for nesting habitat in the sagebrush vegetation type is sagebrush. Within this vegetative community, the majority of sage grouse nests occur under sagebrush. It is assumed that within the mountain shrub vegetative community, sage grouse nest would be found under the mountain shrub components as well as sagebrush. The most important factor for brooding habitat is the availability of the appropriate foods for the chicks. Also, during the later summer months of brood rearing, the availability of water becomes important. Within the pre -mine vegetative community, the nesting cover component is assumed to be sagebrush as well as other elements of the mountain shrub community. Within the post- mining vegetative community, seeded shrubs will supply the necessary requirements for nesting cover. Within the literature no specific location of nests seem to be indicated other than a preference for less dense and shorter shrubs which seem to indicate a need for quick escape should the hen be flushed unexpectedly. The density and structures of the shrub component within the post -mine community should provide the diversity of cover and density suited to sagegrouse nesting. Within the pre -mine vegetative community, insects and succulent vegetation provide the majority of the food for the developing chicks. As these food sources mature and dry, the grouse will move to areas still supporting succulent vegetation. These sites include springs, seeps, drainage bottoms and water impoundments. During the late summer and fall months, the important food plants dry up on the upland slopes and the grouse will tend to remain Rule 2 Permits 2.05 -45 Revision Date: 10/23/12 Revision No.: RN -06