Ledge of dropped ice at upper end of Wenrich Slough Ledge of ice that has dropped down from the river bank in the upper end of Wenrich Slough below Wenrich Island and has created a hard to see edge that could pose a travel hazard. Process Observed: Ice CollapseWater Level DropTravel Hazard Date Process Observed: Monday, December 17, 2007 Galleries: Upper end of Wenrich Slough below Wenrich Island Gallery