Two-day old refrozen crack near Sam Charley Island Photo Credits: Knut Kielland Knut Kielland measured the ice in this two-day old refrozen crack near Sam Charley Island to be 2 inches thick. Process Observed: Open Water (Refrozen)Ice ThicknessScientific Measurements Date Process Observed: Monday, January 9, 2006 Galleries: Main trail near Sam Charley Island Gallery