| OCR Text |
Show 11 densities are calculated from samples taken with individual beer cans, with cut out tops. ( Plastic lids for these are available at any supermarket). Color tread profiles have not been successful to date, due to the shallowness of layers. These simple profiles have been very helpful in determining proximity of slide surfaces, or structural weakness in new layers. However, since metamorphism is very active in our warm climate, profiles have to be taken every 2k hours, especially during or after storms, to detect and identify problems in time. As indicated by our avalanche patterns, these observations and analysis are most critical during and after storms. AVALANCHE CONTROL Control measures are also most critical during and after storms. The most practical of these has been ski stabilization during storms, followed by closure of the area if snow fall intensities and volume prove this to be ineffective. The use of explosives is a very touchy situation. First, the deposition zone of most slide paths is the lift line of # 1 lift itself. Al-though threatened towers have slide diversion mounds, even relatively small slides can inactivate the lift, which represents the only access from the parking lot of the ski area and back. Consequently its function is necessary as long as any part of the ski area is in use. In addition, the lift line itself finally channels into the parking lot. There is also the possibility of sympathetic slides in the snow play area below. Thus the only safe time to use explosives is at night when the entire area is empty. |
