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reclaimed site will be deemed successful for the parameter in question. This complies with the <br />provisions of DRMS Regulation 4.15.11(2)(a). <br />2) If sample adequacy exists at the reclaimed site and the reference area, and the mean value at <br />the reclaimed site is less than Q, a "standard null" one-sided t-test with alpha error probability of <br />0.10 will be used, in conformance with DRMS Regulation 4.15.11(2)(b). <br />3) If sample adequacy is not achieved at the reclaimed site, but is achieved at the reference <br />area, and the following 2 conditions are met: 1) a minimum of 30 samples were taken at the <br />reclaimed site, and 2) mean production at the reclaimed site is greater than Q, a "reverse null" <br />hypothesis will be tested using a one -sample one-sided t-test with alpha error probability of <br />0.20, in conformance with DRMS Regulation 4.15.11(2)(c). <br />The success standards for species diversity, shrub density and seasonal variety are not <br />appropriate for the dryland pasture. The postmining land use for the New Horizon 2 area is <br />pastureland, which is consistent with the pre -mining land use. This type will occur within the <br />Irrigated Pasture type. In addition, ranchers within the New Horizon 2 study area indicated a <br />desire to replace the present areas containing sagebrush with a more productive community <br />oriented towards livestock. The present sagebrush type (formerly sagebrush and pinyon juniper <br />dominated vegetation; see Attachment 2.04.10-7,(Peabody Addendum 10-3) is not being <br />reclaimed because it is only a minor type reflecting a vegetative composition that has resulted in <br />a stand dominated by increased and undesirable species. The present stands are not critical or <br />unique habitat for wildlife, nor do they constitute any real wildlife value when one considers the <br />extensive native vegetation in the immediate Nucla area and the habitat resulting from irrigation <br />along with the large trees and shrubs in farmsteads in the area. <br />7.3 Dryland Pasture Management <br />Management and maintenance activities will include any necessary repair of rills or gullies <br />(detailed in Section 2.05.3(3)), reseeding, or grazing minimization. Grazing minimization will <br />be centered on the prevention of domestic livestock grazing on dryland pasture areas. <br />The practice will be used for the purpose of improving stand composition. Interseeding is not a <br />substitute for full reseeding of failed stands that are deficient in perennial cover, but would be <br />used to increase individual life form components that are lacking. <br />Grazing Plan <br />The dryland pasture areas consist of species that can withstand natural grazing pressure of <br />wildlife and continue to protect the resource. Seed Mix #8 has been designed to achieve this. The <br />species present will supply forage during green -up periods early in the spring and later in the fall, <br />Page 47 May 2016 (TR -75) <br />