Thin ice at lower end of Hotcake Slough Knut Kielland's axe easily breaks through the thin ice layer showing that this would not hold the weight of a snowmachine and is a dangerous area for travelers. Process Observed: Open Water (Hidden)Thin IceIce Strength Date Process Observed: Saturday, March 31, 2012 Galleries: Main part of the Tanana River at lower end of Hotcake Slough Gallery