NEW : Woman at University of Utah , dies of her injuries . Woman was trapped under 2 feet of snow in avalanche at ski resort . Witness contacted authorities ; woman rescued an hour later . One was trapped after second avalanche near resort , witnesses say .
NEW : Woman taken University of Utah hospital dies of her injuries . Woman was buried under 2 feet of snow in avalanche at ski resort . Witness contacted authorities ; woman rescued an hour later . One person trapped after second avalanche near resort , officials say .