Some of the recent avalanches were really big, some reaching historic levels. Tuesday, both natural and explosive triggered avalanches reached D3 to D4 in size. The Disney slide path above Highway 40, as just one example, hasn’t run this big since 1957. The D4 avalanche out of Bethel on the east side of the Eisenhower Tunnel crossed all 4 lanes of I-70 with debris 6 to 15 feet deep for a 300 foot long stretch of road.
