NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Division of Water Quality Water Quality Section Environmental Sciences Branch May 2000 TABLE OF CONTENTS Page List of Tables .......................................................................................................................................... 3 List of Figures ......................................................................................................................................... 6 EXECUTIVE SUMMARY...................................................................................................................... 10 EXECUTIVE SUMMARIES BY PROGRAM AREA ................................................................. 18 Benthic Macroinvertebrates........................................................................................ 18 Bioclassifications and water quality changes ................................................ 18 New species and distributional records for the benthic invertebrate fauna.............................................................................................................. 19 Fisheries ..................................................................................................................... 20 Fish Community Structure............................................................................. 20 Fish Kills ........................................................................................................ 20 Fish Tissue .................................................................................................... 21 Lake Assessment ....................................................................................................... 22 Ambient Monitoring System........................................................................................ 23 Aquatic Toxicity Monitoring......................................................................................... 24 INTRODUCTIONS TO PROGRAM METHODS................................................................................... 25 Benthic Macroinvertebrates..................................................................................................... 25 Fisheries .................................................................................................................................. 25 Fish Tissue ................................................................................................................. 25 Fish Kills ..................................................................................................................... 25 Lake Assessment .................................................................................................................... 26 Ambient Monitoring System..................................................................................................... 26 Aquatic Toxicity Monitoring...................................................................................................... 27 ROANOKE RIVER SUBBASIN 01........................................................................................................ 28 Description............................................................................................................................... 28 Overview of Water Quality.......................................................................................................29 River and Stream Assessment................................................................................................ 30 Lake Assessment .................................................................................................................... 32 ROANOKE RIVER SUBBASIN 02........................................................................................................ 36 Description............................................................................................................................... 36 Overview of Water Quality.......................................................................................................37 River and Stream Assessment................................................................................................ 37 ROANOKE RIVER SUBBASIN 03........................................................................................................ 39 Description............................................................................................................................... 39 Overview of Water Quality.......................................................................................................40 River and Stream Assessment................................................................................................ 40 Fish Tissue .............................................................................................................................. 41 ROANOKE RIVER SUBBASIN 04........................................................................................................ 42 Description............................................................................................................................... 42 Overview of Water Quality.......................................................................................................43 River and Stream Assessment................................................................................................ 43 Lake Assessment .................................................................................................................... 44 ROANOKE RIVER SUBBASIN 05........................................................................................................ 46 Description............................................................................................................................... 46 Overview of Water Quality.......................................................................................................47 River and Stream Assessment................................................................................................ 48 Lake Assessment .................................................................................................................... 48 ROANOKE RIVER SUBBASIN 06........................................................................................................ 55 Description............................................................................................................................... 55 Overview of Water Quality.......................................................................................................56 River and Stream Assessment................................................................................................ 57 Fish Tissue .............................................................................................................................. 57 Lake Assessment .................................................................................................................... 58 ROANOKE RIVER SUBBASIN 07........................................................................................................ 60 Description............................................................................................................................... 60 Overview of Water Quality.......................................................................................................60 NCDENR, Division of Water Quality BASINWIDE ASSESSMENT REPORT - ROANOKE RIVER BASIN – MAY 2000 1 TABLE OF CONTENTS (continued) Page River and Stream Assessment............................................................................................................. 61 Fish Tissue .............................................................................................................................. 61 Lake Assessment .................................................................................................................... 62 ROANOKE RIVER SUBBASIN 08........................................................................................................ 66 Description............................................................................................................................... 66 Overview of Water Quality.......................................................................................................67 River and Stream Assessment................................................................................................ 68 Fish Tissue .............................................................................................................................. 69 Lake Assessment .................................................................................................................... 69 ROANOKE RIVER SUBBASIN 09........................................................................................................ 71 Description............................................................................................................................... 71 Overview of Water Quality.......................................................................................................72 River and Stream Assessment................................................................................................ 73 Fish Tissue .............................................................................................................................. 75 ROANOKE RIVER SUBBASIN 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