4.5.18 Watauga River Basin 4.5.18.1 River Basin Description The Watauga River watershed drains northwest into Tennessee where it flows into Watauga Reservoir. The Watauga River is a tributary of the Holston River, which is a major tributary of the Tennessee River. The basin is one of the smallest in North Carolina, encompassing only 205 square miles and approximately 270 stream miles, and is entirely within the Mountain ecoregion. The Elk River is a major tributary. Based on 2011 National Land Cover Dataset information (MRLC 2011; Jin et al. 2013), land use in the basin is 79% forested, 10% agricultural, 10% developed or urban, 1% grassland, and less than 1% wetland (MRLC 2011; Jin et al. 2013). Most land ownership is private, with less than 10% public lands (which includes portions of the Pisgah National Forest, Blue Ridge Parkway, Elk Knob Game Land, and Grandfather Mountain State Park). The basin encompasses parts of two counties (Avery and Watauga) and has six municipalities, including Banner Elk, Beech Mountain, Seven Devils, and Sugar Mountain. Figure 4.5.18.1 depicts the location of the basin. Figure 4.5.18.1 Location of the Watauga River Basin. DRAFT, 4-137 4.5.18.2 Aquatic Resource Conditions Water quality is generally good for areas where data are available; however, there are problems in parts of the basin (described below) and the lack of data for nearly half the basin provides an unclear assessment of overall water quality. There are more than 300 miles of freshwater streams in the basin that have been classified by NCDWR for best uses (NCDWR 2015d). Table 4.5.18.1 provides information on water quality classifications and use-support ratings in the basin. Table 4.5.18.1 Water quality classifications and use ratings in the Watauga River Basin. Classifications Total Basin Waters Classified Waters HQW ORW Use Ratings Total Monitored Supporting Impaired Not Rated No Data Freshwater Miles Percent (Basin Waters) 650 309 51 21 48 8 3 Freshwater Miles Percent (Monitored Waters) 279 95 6 36 143 34 2 13 51 Freshwater Acres 54 54 0 0 Freshwater Acres 0 0 0 0 0 Percent (Basin Waters) 100 0 0 Percent (Monitored Waters) 0 0 0 0 There are 171 miles of NCDWR-designated trout waters (Tr) in the basin. The mainstem Watauga River is designated High-Quality Waters (HQW) and the Boone Fork and headwaters are designated Outstanding Resource Waters (ORW)(NCDWR 2015d).There is one HQW Special Management Strategy Area (SMSA) for the Watauga River (28,790 acres) and one ORW SMSA for the Boone Fork Area (6,302 acres) in the basin (NCDWR 2015c). These areas require site-specific provisions to protect resource values (no new discharges or expansion of existing discharges) (NCAC). 4.5.18.3 Aquatic Species There are five SGCN in the basin: one crayfish species, three freshwater fish species, and one freshwater mussel species. Appendix G provides a list of SGCN and other priority species for which there are knowledge gaps or management concerns. Appendix H identifies SGCN associated with aquatic communities found in this river basin. Table 4.5.18.2 identifies the priority species found in the Watauga River Basin. DRAFT, 4-138 Table 4.5.18.2 SGCN in the Watauga River Basin. Taxa Group CRAYFISH FISH MUSSEL Scientific Name Cambarus eeseeohensis Ameiurus platycephalus Cottus carolinae Salvelinus fontinalis Lasmigona subviridis Common Name Grandfather Mountain Crayfish Flat Bullhead Banded Sculpin Brook Trout (Native) Green Floater Federal/State Listing Status* - /T - /E *See Section 4.5.3. 4.5.18.4 Threats Affecting Aquatic Species While water quality conditions are generally very good at present, past pollution events may have had a profound effect on the extant aquatic fauna in the Watauga River Basin. A tannery near Valle Crucis caused severe pollution in the early 20th century and may have led to the extirpation of many native species. Apparently, no extensive surveys for aquatic species were made prior to this period of degradation and the extent of species loss is unknown. Presently, excessive erosion and sedimentation from nonpoint sources are the primary problems affecting species and habitats. Most development and agricultural activities are located in the valleys due to abundance of steep slopes within the watershed. Narrow riparian corridors or total lack of riparian vegetation along portions of the Watauga River and many tributaries have led to excessive stream bank erosion and loss of habitat due to sediment deposition and over-widening of channels. Impacts from row-crop agriculture and poorly managed livestock pasture (causing sedimentation from runoff and stream bank erosion) are also significant. The area appears to be experiencing an acceleration of development, and threats to water and habitat quality are increasing. Development (primarily home construction) is rapidly increasing on steeper slopes. As related development increases (e.g., golf courses, commercial), stormwater runoff contributes more sedimentation and other nonpoint problems. Christmas tree farming is also increasing in the basin. Relatively large amounts of herbicides and pesticides are used in this form of silviculture, but the relative impacts of runoff from tree farms is unclear. Impacts from nonnative species (e.g., Margined Madtom) are also unclear, but could negatively affect native fish communities. According to the NCDENR dam inventory (NCDEMLR 2014), there are 20 impoundments in the basin. Most are small privately owned lakes used for recreation. There are no major impoundments within the North Carolina portion of the basin. There is one run-of-river hydroelectric facility on the Watauga River (Ward Mill Dam). There are several small impoundments on tributaries, including Beech Mountain Reservoir on Buckeye Creek (drinking DRAFT, 4-139 water reservoir) and Seven Devils Resort Lake on an unnamed tributary to the Watauga River (recreation). 4.5.18.5 Recommendations Conservation priorities that apply statewide to all river basins are presented in Section 4.5.3.3. Priorities identified in the Watauga River Basin are shown in Figure 4.5.18.2 and are included in Appendix J. Figure 4.5.18.2 Location of priority watersheds in the Watauga River Basin. DRAFT, 4-140 Basin Specific Recommendations Distributional Surveys. While the general distribution of most species is known, surveys are still needed to complete primary distributional status for some SGCN (see Table 4.5.18.1). Snails – complete primary distribution inventories; determine potential habitats and distribution surveys for hydrobiids. Determine distribution of non-native species. Monitoring. Long-term monitoring is critical to assessing species and ecosystem health over time and gauging the resilience of organisms to continued impacts to state waters. Studies should include identification of population trends, as well as assessment of impacts from conservation or development activities. Baseline data and monitoring strategies have been developed for most priority species and habitats in the basin. These efforts will inform species and habitat management decisions. Monitoring plans should be coordinated with other existing monitoring programs where feasible. Continue periodic monitoring of priority areas and species. The status of Green Floater, petitioned for federal listing, is of particular interest. Research. Research topics that facilitate appropriate conservation actions include habitat use and preferences, reproductive behavior, fecundity, population dynamics and genetics, feeding, competition, and food web dynamics. Increased understanding of life histories and status helps determine the vulnerability of priority species to further imperilment, in addition to identifying possibilities for improved management and conservation. All studies should provide recommendations for mitigation and restoration. Formal descriptions for known or putative undescribed species and investigations aimed at resolving taxonomic status are needed. Investigate aquatic community response to restoration projects in priority areas. Investigate potential for species reintroduction in the basin, particularly native mussels in the Watauga River. Obtain more information on impacts and mitigation of water withdrawals in headwater systems. In addition to the SGCN species found in the basin (see Table 4.5.18.2), a list of knowledge-gap priority species is provided in Table 4.5.18.3. DRAFT, 4-141 Table 4.5.18.3 Knowledge-gap priority species in the Watauga River Basin. Taxa Group FISH MUSSEL Scientific Name Common Name Chrosomus oreas Etheostoma chlorobranchium Notropis photogenis Notropis telescopus Percina aurantiaca Pimephales notatus Corbicula fluminea Mountain Redbelly Dace Greenfin Darter Silver Shiner Telescope Shiner Tangerine Darter Bluntnose Minnow Asian Clam Federal/State Listing Status* *See Section 4.5.3. Management Practices. Management practices that reduce impacts and work synergistically with other conservation actions are needed to enhance the resilience of natural resources. Particular needs include preserving biodiversity, protecting native populations and their habitats, and improving degraded habitats. In addition, education about, and regulation and prevention of the introduction and spread of exotic or invasive species are vital. Specific issues in this basin include secondary and cumulative impacts upon water quality, riparian vegetation and stream bank restoration and conservation, mitigation of hydropower development impacts, and species restoration opportunities. Prioritize education and other measures to prevent the introduction or spread of invasive nonnative species, particularly crayfishes. Support stream and riparian area conservation and restoration throughout the basin, particularly in priority areas. Conservation Programs and Partnerships. Conservation programs, incentives, and partnerships should be utilized to the fullest extent in order to preserve high-quality resources and protect important natural communities. Protective measures that utilize existing regulatory frameworks to protect habitats and species should be incorporated where applicable. Land conservation or preservation can serve numerous purposes in the face of anticipated climate change, but above all, it promotes ecosystem resilience. Support the Watershed Restoration Plan (WRP) and River Basin Restoration Priorities (RBRP) developed by NCDMS for the Watauga River Basin (NCWRP 2002b; NCEEP 2009d). Work together with Soil and Water Conservation District programs, such as the Agriculture Cost Share Program, to conserve priority areas. DRAFT, 4-142
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