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Show 1. West Hellgate, Superior, and Little Superior ( Figure 2) Following a major storm cycle, a period of warming can cause a wet- slide cycle in the Mount Superior area, most common after mid- March. Close observations must be taken, particularly in the spring, of the temperature and wind during a warm day following a storm. The most dangerous time, of course, is in the middle of the day. The south- facing cliffs and the West Hellgate slide path are good indicators of wet slide hazard. West Hellgate often runs with any significant warming. 2. East and West Hellgate ( Figure 2) The two slide paths shown on the next page, East and West Hellgate, also can pose a threat to the road. East Hellgate has about the same orientation as Superior, and a storm causing hazard buildup on Superior will also cause a buildup on the Hellgates. East Hellgate will cross the highway frequently but not quite as often as Superior. West Hellgate is also a frequent slider but it is much less likely to cross the highway than Mount Superior or East Hellgate. |