LEADER 02053oam 2200457Ia 450 001 9910695912203321 005 20070821124612.0 035 $a(CKB)5470000002374683 035 $a(OCoLC)163575313 035 $a(EXLCZ)995470000002374683 100 $a20070809d2007 ua 0 101 0 $aeng 135 $aurmn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aAssessment of hydrology, water quality, and trace elements in selected placer-mined creeks in the Birch Creek watershed near Central, Alaska, 2001-05$b[electronic resource] /$fby Ben W. Kennedy and Dustin E. Langley ; prepared in cooperation with the Bureau of Land Management 210 1$aReston, Va. :$cU.S. Geological Survey,$d2007. 215 $aviii, 50 pages $cdigital, PDF file 225 1 $aScientific investigations report ;$v2007-5124 300 $aTitle from PDF title screen (viewed on Aug. 7, 2007). 320 $aIncludes bibliographical references (pages 38-40). 606 $aPlacer mining$xEnvironmental aspects$zAlaska$zBirch Creek Watershed (Yukon-Koyukuk Census Area) 606 $aHydrology$zAlaska$zBirch Creek Watershed (Yukon-Koyukuk Census Area) 606 $aWater quality$zAlaska$zBirch Creek Watershed (Yukon-Koyukuk Census Area) 606 $aTrace elements$xEnvironmental aspects$zAlaska$zBirch Creek Watershed (Yukon-Koyukuk Census Area) 615 0$aPlacer mining$xEnvironmental aspects 615 0$aHydrology 615 0$aWater quality 615 0$aTrace elements$xEnvironmental aspects 700 $aKennedy$b Ben W$01382493 701 $aLangley$b Dustin E$01381043 712 02$aUnited States.$bBureau of Land Management. 712 02$aGeological Survey (U.S.) 801 0$bGIS 801 1$bGIS 801 2$bGPO 906 $aBOOK 912 $a9910695912203321 996 $aAssessment of hydrology, water quality, and trace elements in selected placer-mined creeks in the Birch Creek watershed near Central, Alaska, 2001-05$93543103 997 $aUNINA