NORTH CAROLINA DEPARTMENT of ENVIRONMENT and NATURAL RESOURCES Division of Water Quality Environmental Sciences Section
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NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Division of Water Quality Environmental Sciences Section April 2005 This page was intentionally left blank NCDENR, Division of Water Quality Basinwide Assessment Report – Little Tennessee River Basin – April 2005 1 TABLE OF CONTENTS Page LIST OF APPENDICIES ........................................................................................................................3 LIST OF TABLES...................................................................................................................................4 LIST OF FIGURES ................................................................................................................................4 OVERVIEW............................................................................................................................................5 LITTLE TENNESSEE RIVER SUBBASIN 01........................................................................................6 Description......................................................................................................................................6 Overview of Water Quality..............................................................................................................7 River and Stream Assessment.......................................................................................................8 LITTLE TENNESSEE RIVER SUBBASIN 02......................................................................................24 Description....................................................................................................................................24 Overview of Water Quality............................................................................................................25 River and Stream Assessment.....................................................................................................27 LITTLE TENNESSEE RIVER SUBBASIN 03......................................................................................40 Description....................................................................................................................................40 Overview of Water Quality............................................................................................................41 River and Stream Assessment.....................................................................................................42 LITTLE TENNESSEE RIVER SUBBASIN 04......................................................................................45 Description....................................................................................................................................45 Overview of Water Quality............................................................................................................46 River and Stream Assessment.....................................................................................................46 REFERENCES ....................................................................................................................................50 GLOSSARY .........................................................................................................................................51 NCDENR, Division of Water Quality Basinwide Assessment Report – Little Tennessee River Basin – April 2005 2 LIST OF APPENDICIES Appendix Page B-1 Benthic macroinvertebrate data, sampling methods, and criteria..................................................54 F-1 A summary of fish community assessment data ...........................................................................58 F-2 Habitat evaluations and stream and riparian habitats at 22 fish community monitoring sites In the Little Tennessee River basin................................................................................................60 F-3 Fish community sampling methods and criteria.............................................................................64 F-4 Fish community data collected from the Little Tennessee River basin, 1993 – 2004 ...................70 F-5 Fish community metric values from 22 wadeable streams in the Little Tennessee River Basinwide monitoring program, 2004 ............................................................................................71 F-6 Fish distributional records for the Little Tennessee River basin ....................................................72 F-7 Water quality at fish community sites in the Little Tennessee River basin, 2004..........................73 F-8 Web links........................................................................................................................................77 NCDENR, Division of Water Quality Basinwide Assessment Report – Little Tennessee River Basin – April 2005 3 LIST OF TABLES Table Page 1 Land use in Subbasin 01.................................................................................................................. 7 2 Waterbodies monitored in Subbasin 01 in the Little Tennessee River basin for basinwide assessment, 1999 and 2004............................................................................................................ 8 3 Land use in Subbasin 02................................................................................................................ 24 4 Waterbodies monitored in Subbasin 02 in the Little Tennessee River basin for basinwide assessment, 1999 and 2004.......................................................................................................... 26 5 Land use in Subbasin 03................................................................................................................ 41 6 Waterbodies monitored in Subbasin 03 in the Little Tennessee River basin for basinwide assessment, 1999 and 2004.......................................................................................................... 41 7 Land use in Subbasin 04................................................................................................................ 46 8 Waterbodies monitored in Subbasin 04 in the Little Tennessee River basin for basinwide assessment, 1999 and 2004.......................................................................................................... 46 LIST OF FIGURES Figure Page 1 Sampling sites in Subbasin 01 in the Little Tennessee River basin ................................................6 2 Sampling sites in Subbasin 02 in the Little Tennessee River basin ..............................................24 3 Little Tennessee River at SR 1113, number of EPT taxa collected and the North Carolina Biotic Index.....................................................................................................................................28 4 Sampling sites in Subbasin 03 in the Little Tennessee River basin ..............................................40 5 Sampling sites in Subbasin 04 in the Little Tennessee River basin ..............................................45 NCDENR, Division of Water Quality Basinwide Assessment Report – Little Tennessee River Basin – April 2005 4 OVERVIEW The Little Tennessee River basin is located within the Blue Ridge Province of the Appalachian Mountains of western North Carolina. It encompasses about 1,800 mi2 in Swain, Macon, Clay, Graham, Cherokee, and Jackson counties (Figure 1). Much of the land within the basin is federally owned (49%) and in the U.S. Forest Service’s Nantahala National Forest (including the Joyce Kilmer/Slick Rock Wilderness Area) or the Great Smoky Mountains National Park (GSMNP). The basin also includes the Cherokee Indian Reservation. Subbasins within the Little Tennessee River basin are described by a six digit code (040401 - 040404), but are often referred to by their last two digits (e.g. Subbasin 01). The North Carolina section of the Little Tennessee River is typical of many other mountain rivers. The gradient is relatively steep in most reaches of the river and the substrate is dominated by riffle habitats. The headwater reaches of the Little Tennessee River are located in Georgia. Most tributaries are high gradient streams capable of supporting trout populations in the upper reaches. Most of the basin is forested. However, lower reaches of many tributary catchments are farmed or developed resulting in the increased potential for nonpoint source problems. The Little Tennessee River is one of three major tributaries of Fontana Lake. The other two are the Nantahala River and the Tuckasegee River. The Cheoah River, the fourth major tributary of the Little Tennessee River in North Carolina, has its confluence with the river below Fontana Lake. In the upper section of the Little Tennessee River watershed, twenty of the 27 sites monitored for benthic macroinvertebrates or fish were rated Good or Excellent; no sites were rated Poor. The two sites rated Fair were the Little Tennessee River near the NC-GA state line and the upper reaches of the Cullasaja River near the Town of Highlands. Streams that have consistently been rated Excellent were Coweeta, Turtle Pond, Burningtown, and Tellico Creeks. This area is within the Nantahala National Forest and most tributaries are high gradient streams capable of supporting trout populations in the upper reaches. The water quality of rivers and streams in this area is generally high. Principal tributaries to the Little Tennessee River in the middle watershed area are the Oconaluftee River, the Tuckasegee River,