Associate professor Margaret Darrow, inspects a spruce tree which has split into several pieces. The tree is one one of several frozen debris lobes which have appeared along the Dietrich River valley in the southern Brooks Range which could threaten the highway and the nearby trans-Alaska pipeline.

ArcticDalton HighwayResearchdebris lobeengineeringgeologyfacultyfemaleoutsidesummerhorizontalDietrich River valleyBrooks Range