From post #279:
Rudoy postulates that, during the Ice Ages, a huge ice dam upstream held back a lake 3,000 feet deep, containing 200 cubic miles of water. When the ice dam suddenly ruptured, all life and land downstream was devastated.
*************************************EXCERPT from the document at link at post #270:
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Scientists have invented an ad hoc process, for the creation of a lake, which contradicts climatic and geophysical thermal conditions. However, Warren C. Hunt exposed another problem related to such an ice dam. He claimed that it would be impossible for an ice dam to hold back a lake of water 2,100 feet deep.23
According to Hunt, since modern engineering employs bedrock grouting for securing the footings of 500-foot...dams, it must strike any reader as...frivolous to suggest that chance emplacement of glacial ice might have dammed Clark Fork across a 7-mile...span lacking in intermediate abutments and then retained water at four times the pressure of modern, engineered, concrete dams!24
In fact, Hunt proved the dam was emplaced elsewhere and "would have had an unsupported length of approximately 50 [miles]...."25
He said that "[i]ce has no effective tinsel strength"26 and would break under the stresses created by the pressure on an ice wall over seven miles in length. Consider picking up a block of ice measuring 100 feet long x 20 feet thick x 40 feet wide at its ends. The weight of the ice block will cause it to snap and break. The longer the length of the dam, the easier it is to break.