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I I I I I At the base of the Triangle Peak lift, the Leq 5~ dB (Al contour would extend 350 feet beyond the permit boundary. I At the base of the 10-4 Peak lift, the Leq 55 dB(Al contours w~u1d extend 650 feet beyond the permit boundary. At the northwe~tern-m:>st lift locations the Leq 55 dB (A) noise contour would ~xtem 750 feet west of U.S. HigtMay 160. At each of the bases of the remaining lifts along U . s. HigtMay 160, the Leg 55 dB (All contour \~ou1d extend 600 feet west of the higtMay. I I If the snCMnaking machines are silTP..lltaneous1yl operating at adjacent lifts, the Leg 55 dB(Al contours win increase as follows. At a point midway between the bases ofl the back bowl lifts up to Triangle Peak and the 10-4 Peak, tlje Leq 55 dB(Al contour would extem700 feet beyond the eastern permit boundary. At the four lifts surrounding the Base Lodge, the! canbined noise of adjacent snCMnaking equipnent would extend tlje Leq 55 dB(Al contour 1700 feet to the west of U.S. HigtMay 1~0. At a point midway between the two southern-most lifts, th~ Leq 55 dB (A) contour would extend lOOO feet to the west of U'S'I HigtMay 160. Although the above analysis considers that the ba~es of lift lines constitute worst case locations, snCMmaking machines are, in reality not restricted to these locations. I . I OI7er-the-snow vehicles (snowcats and snowmobil~sl can generate noise levels of 55 dB(Al at distances in excess ofl 1000 feet under full load conditions. 'l'hese vehicles may be he!ard up to l,050 feet west of U.S. HigtMay 160 and upto 800 feet e~t of the permit boundary. OI7er-the-snow vehicles are not statiorul-ry noise sources and will exist at single locations for relative1Yi short periods of t~. I Studies (Freddy, 1980, Lyon, 1979, & Ward, 1984l ~ndicate that big game (deer and elk) are susceptible (alertness, displacanent, increased heart rate, etc.' to hlmlan disturtlances (on foot, snowmobile, logging actiVities, roads, public firewood gathering, etc.l. I I Ski run construction (clearing, road constructi~n am lift tCMer constructionl would take place over a short I time period and animals could be expected to be displaced, I etc. during the activity and return when the construction activity was over. However, as a result of maintenance activities a~ increased other human disturbances (more recreationists and I increasing and continual activities on the adjacent private l~nd deve10pedl, it is likely that the numbers of deer and elk or) the permit area would decrease. Due to the continual disturbanC\l (either by noise and/or the presence of peoplel on the private lard some elk may be displaced or lost. 192