VIDEO: Huge Avalanche Dams River, Creates Lake, Blocks Only Road to Valdez, AK This clip shows a flyover of Keystone Canyon and the Lowe River, 1/26/2014. A glacier sized avalanche has blocked the river. An ice lake has formed, currently at an estimated depth of 60 feet and growing. The Richardson Highway is flooded […] Avalanche SnowBrains | January 28, 2014 5 Comments