How to avoid dangerous areas 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 Sam Demientieff describes what to look for and how to avoid dangerous areas, and how open spots seem to change from year to year. Process Observed: Seasonal ChangeChanges in River ChannelUnsafe IceOpen Water (Lead) Date Process Observed: Wednesday, March 23, 2011 Galleries: Upper end of Yukon Slough Gallery