01483oam 2200397 a 450 991069884620332120110523115741.0(CKB)5470000002397404(OCoLC)325208008(EXLCZ)99547000000239740420090518d2009 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierStatus and trends of resources below Glen Canyon Dam update, 2009[electronic resource] /John F. Hamill[Reston, Va.] :U.S. Dept. of the Interior, U.S. Geological Survey,2009.1 online resource (4 unnumbered pages) color illustrationsUSGS fact sheet ;2009-3033Title from title screen (viewed on May 23, 2011).Includes bibliographical references (page [3]).DamsEnvironmental aspectsColorado River (Colo.-Mexico)DamsEnvironmental aspectsArizonaGrand CanyonGlen Canyon Dam (Ariz.)Environmental aspectsDamsEnvironmental aspectsDamsEnvironmental aspectsHamill John F(John Francis),1950-1419649Geological Survey (U.S.)GPOGPOGPOBOOK9910698846203321Status and trends of resources below Glen Canyon Dam update, 20093534836UNINA