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deer and 3.0 meters minimum for elk and moose. The Deserado Mine conveyor was elevated to a maximum of 0.9 meters clearance. Photograph 3 shows mule deer passage beneath the conveyor system. Mule deer observed during this event, would drop forward while lowering their neck and head and pass under the belt line in a forward plunging motion. This passage was usually very quickly executed without reducing the animals gait from the initial approach of the structure. Little evidence of mule deer or antelope drag marks were present during the study. Elk cows, calves, and immature spike bulls would follow a similar method of passage under the belt Drag marks were more frequently observed on elk passage under the belt. The underside of the conveyor belt also could be raised approximately 5 cm when the animals back would brush underneath the belt, thereby allowing some additional clearance. Elk, antelope, and mule deer were all viewed passing under the conveyor while the belt was active. In one case, a small tuft of dorsal hair was brushed from the animal's back while crossing beneath the moving conveyor belt. The mule deer appeared unharmed and continued through the structure. Photograph 3 shows a adult female mule deer crossing beneath the conveyor structure. No beltline mortalities of any big game animals or other wildlife species have ever been found since the beginning of operations at the mine. Hig game animal passage data can be found in Table 5. This table includes direction of travel per species counted. 68 percent of all elk tracks counted were heading in an easterly direction of travel. Elk migration patterns may be reflected in the preference for easterly travel verses passage in a westerly direction. Mule deer were for the most part evenly distributed in direction of travel with a total of 41.9 percent easterly verses a 58.1 percent westerly passage. Pronghorn antelope travel were recorded as follows - 35.3 percent towards the east verses 64.7 percent moving towards the west. This data may reflect migration events between winter and summer ranges which showed a preference of passage toward the west for pronghorn. Predator direction of travel data had sample sizes that were too small to determine any preference in travel direction. Data presented indicates that big games animals migrate across the conveyor structure in both directions, as anticipated. Figure 3 illustrates the distribution of animal passage over the study period. This data shows good distribution of animal passage with the exception of two areas where Beltline Transfer Buildings (TS-1 and TS-2) are located. The highest number of track count passage occurred in an area between the refuse haul road and railroad loadout building, where the least amount of disturbance occurs from mine workers and machinery. Topography of this site