Sticks marking travel hazard on trail between mouth of Chena River and Byers Island Sticks are used to warn travelers that there is a dangerous ice shelf ridge along the trail between the mouth of the Chena River and Byers Island. Process Observed: Ice CollapseTrail MarkersTravel Hazard Date Process Observed: Saturday, March 31, 2012 Galleries: Between mouth of Chena River and Byers Island Gallery