Site-specific baseline wildlife data (Mariah Associates. 1979a) for the Seminoe II mine permit area combined with the most recent mine engineering plan for this site (Arch Mineral Corporation. 1979) form the basis for the assessment of impacts to wildlife resulting from ongoing mining operations and proposed mine expansions. Assessments address impacts to all wildlife components resulting from both surface disturbance, development and operation of ancillary facilities, haul roads, railroad rights-of-way, powerlines and increased human presence in the general vicinity of the mine site. Table 1.1(b) presents the general categories of impact to wildlife expected from surface coal mining operations at Seminoe II mine and rates the severity of each impact on the various wildlife components present in the study area. This table forms the basis for all subsequent discussions of impact to wildlife at Seminoe II mine. Map 09-2 depicts areas of past. ongoing and future surface mining activities on the Seminoe II mine site and relates these areas to the known distribution of antelope and mule deer,raptor nesting sites and important wildlife habitat on the Seminoe II permit area. A brief discussion of the present mine operation and planned mine expansion activities precedes wildlife impact discussions. Impacts on wildlife from mining activities may be classified according to their duration either short-term or long-term. Short-term impacts would be those that would result directly from and occur during mining operations, but assuming reclamation efforts are successful would terminate after reclamation long-term impacts are those that would persist even after successful reclamation efforts. long-term impacts usually result indirectly from mining activities and are much more difficult to identify and evaluate (e.g., permanent reduction in local antelope population as a result of a decreased quantity of forage affected by changes in soil nutrient cyclying). Most of the inpacts indentified for Seminoe II mine resulting from surface mining activities can be considered of a short-term nature provied reclamation is successful. Also impacts may be directed at a number of different levels of population organization from the individual to communities, herds or groups to the entire population. Since most of the anticipated impacts at Seminoe II mine site are of a short-term nature, no lasting effects are anticipated at the population level. Accordingly, the individual or groups of individuals (e.g., herds) are the primary focus of the following impact assessment ,the elimination of small mammals or mammalian predators during mining activities but the recovery to baseline population levels after successful reclamation.