Thick ice collapse in Mo's Slough No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip Knut Kielland points out how seven inch thick ice has collapsed and disappeared in Mo's Slough. Process Observed: Ice CollapseIce Thickness Date Process Observed: Friday, February 12, 2010 Galleries: Mo's Slough 1 Gallery