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98 discharges 98 downstream Alberts Run ALBT Hdw aluminum AMD precipitate aquatic average loading values beaver dams blacknose dace brook trout caddisfly CCCD Chironomidae Clarion clay and coal Clearfield County Conservation coal mining concentrations conducted County Conservation District Crooked Sewer Run D2 and D3 decreased deep mining Department of Environmental Discharge located enters Morgan Run Environmental Protection Ephemeroptera fish population flow Game Lands habitat was rated headwaters of Alberts highest number increasing stress instream sites James Run Jeff Zimmerman Jeffries lbs/yr levels of concern low pH Lower Kittanning coal macroinvertebrate community macroinvertebrate population magnesium mainstem manganese Mercer Clay mg/l moderately impaired Morgan Run downstream Morgan Run Watershed Newtown number of macroinvertebrates number of parameters Pennsylvania Department percentage pH and alkalinity Pools rated excellent reclamation Sanbourn Road severely impaired spottail shiners SRBC stonefly stream strip mining sulfate surface mines Susquehanna River Table total number tributary sites umhos/cm water quality white suckers