| Little Tennessee Basinwide Water Quality Management Plan Foreword and Executive Summary May 1997 |
|
 Nantahala Lake Macon County, NC |
Prepared by the: |
| Little Tennessee Basinwide Water Quality Management Plan Foreword and Executive Summary May 1997 |
|
Nantahala Lake Macon County, NC |
Prepared by the: |
The Little Tennessee Basinwide Water Quality Management Plan was approved by the NC Environmental Management Commission on May 8, 1997 to be used as a guide by the NC Division of Water Quality in carrying out its Water Quality Program duties and responsibilities in the Little Tennessee River Basin. Copies of the entire plan may obtained by contacting the Division of Water Quality at the above address and phone number.
Little Tennessee River Basin Overview
The Little Tennessee River basin is very rich in history, culture, recreation, scenery, wildlife and other assets. Clean water in the Little Tennessee River basin is critical to the health, economic well-being and quality of life of residents and tourists alike. Native Americans have long used the rivers. Even today, local churches use the waters for baptisms. The first documented baptism alongside the Cullasaja River was that of a female slave in 1837. Festivals held along the river banks promote enjoyment of the river and instill community pride.
Most water users in the basin, including industry, agriculture, tourists, and residents, rely on water for basic needs. These needs include water supply and/or disposal of treated wastewater. In addition, many businesses and residents of the basin rely directly or indirectly on the waters of the basin to meet their recreational needs and supply a living source through tourism. The highly successful multi-million dollar whitewater industry brings thousands of visitors annually. Tubing is also a popular form of recreation. Unique scenic beauty of gorges, waterfalls, wildlife and abundant flora has made the area popular for tourists. The waters of the Little Tennessee River basin are well known for lake recreation activities and trout fishing. To these groups and the public they serve, it is important that the basin's waters support viable fisheries, that the waters be relatively safe (low risk of contracting water-borne disease) and that they be aesthetically desirable (free of objectionable colors, odors and smells). Yet maintaining clean water becomes increasingly difficult and more expensive as the population grows, as land is developed and as competition for resources heighten.
The majority of the surface waters in the basin are of good quality based on Division of Water Quality monitoring data. The Use-Support assessment methodology used by DWQ found only about seven stream miles to be impaired. However, there are reasons to be concerned about the quality of several Support Threatened waters in the basin. In addition, many streams have not been monitored by DWQ, so there are potentially other streams with water quality problems.
Some areas of the basin have experienced significant population growth between 1970 and 1990. This growth rate is expected to continue. The construction of roads, driveways, commercial and recreational areas and homes must be undertaken with proper care to prevent sediments from reaching surface waters. In addition, timber harvesting and agricultural activities should use best management practices to avoid erosion and the resulting sedimentation to streams.
Preserving and enhancing the quality of water in the basin is beyond the capabilities of any one agency or group. State and federal government regulatory programs will play an important part, but much of the responsibility will be at the local level. Those who live, work and recreate in the basin have the most at stake.
This document provides a summary of the causes and sources of water pollution in the basin, the status of the basin's water quality, a summary of water quality rules and statutes that apply to water quality protection in the basin, and recommended strategies to protect and enhance the quality of the surface waters in the Little Tennessee River basin. The Little Tennessee River Basinwide Water Quality Management Plan will be used a guide by the NC Division of Water Quality (formerly Division of Environmental Management) in carrying out its water quality program responsibilities in the basin.
Beyond that, it is hoped that the plan will provide a framework for cooperative efforts between the various stakeholders in the basin toward a common goal of protecting the basin's water resources while accommodating reasonable economic growth.
NORTH CAROLINA'S BASINWIDE APPROACH TO WATER QUALITY MANAGEMENT - PURPOSE OF LITTLE TENNESSEE RIVER BASIN PLAN
Basinwide management is a watershed-based water quality management initiative being implemented by the North Carolina Division of Water Quality (previously Division of Environmental Management). The Little Tennessee River Basinwide Water Quality Management Plan is the twelfth basinwide water quality management plan prepared by the Division of Water Quality (DWQ) in a series of plans being prepared for all seventeen of the state's major river basins. DWQ uses the plans as guides in carrying out its water quality programs in each river basin.
The basinwide water quality management plans are not new regulatory documents. They are planning documents used to communicate the state's rationale, approaches and long-term water quality management strategies to policymakers, the regulated community and the general public. Each plan is completed and approved prior to the scheduled date for basinwide discharge permit renewals. The plans are then evaluated, based on follow-up water quality monitoring, and updated at five year intervals.
DWQ uses this approach as a means to report to the public on the current status of water quality in the basin, major water quality concerns and issues, projected trends in development and water quality, the long-range water quality goals for the basin, and recommended point and nonpoint source management options.
The Little Tennessee River Basinwide Water Quality Management Plan was approved by the Environmental Management Commission (EMC) in May 1997 and will be updated in 2002. Basinwide NPDES permitting is scheduled to commence in October 1997.
GOALS OF THE BASINWIDE APPROACH
The primary goals of DWQ's basinwide program are:
In addition, DWQ uses this approach as a means to better identify water quality problems, develop appropriate management strategies, maintain and protect water quality and aquatic habitat, assure equitable distribution of waste assimilative capacity for dischargers, and improve public awareness and involvement in the management of the state's surface waters.
PUBLIC WORKSHOPS
Three public workshops were held in the Little Tennessee River basin on July 25, 1995 in Franklin and on April 9, 1996 on the Cherokee Indian Reservation and in Bryson City. A total of 45 people attended the three workshops. The workshops were co-sponsored by the North Carolina Cooperative Extension Service, the Little Tennessee Watershed Association and DWQ. The purpose of the workshops was to familiarize stakeholders in the basin with DWQ's basinwide approach and to solicit comments for the basin plan. Workshop participants were asked to comment on what they see as the priority issues in the basin and how these issues could be addressed. A summary of the comments received from the workshop participants and DWQ’s responses is provided in Chapter 6.
Priority issues identified at the workshop included:
Many of these issues are interrelated and point to the need for growth management and planning at the local level to address population growth, increased sedimentation and stormwater runoff from developing areas and protection of existing water uses. Accordingly, growth management and planning are emphasized in the plan.
The Little Tennessee River basin is located within the Blue Ridge Province of the Appalachian Mountains of western North Carolina (Figure 1). The headwater reaches of the Little Tennessee River are located in Georgia. The Little Tennessee River basin encompasses about 1,800 square miles in Swain, Macon, Clay, Graham, Cherokee and Jackson counties. Much of the land in the basin is federally owned and lies within the Nantahala National Forest, Great Smoky Mountains National Park (GSMNP) or the Joyce Kilmer/Slick Rock Wilderness area. The basin also includes the entire Cherokee Indian Reservation.
Based on 1990 census data, the population of the basin was 67,083 people. The overall population density is 38 persons per square mile versus a statewide average of 123 persons per square mile. While population in the basin is low, there has been significant population growth. The percent population growth over the twenty year period between 1970 to 1990 was 31.5%. There is the potential for a significant increase in tourism and second home development associated with the opening (1996-1997) of the gambling casino on the Cherokee Indian Reservation. It is expected that the casino may draw 2 million additional visitors per year to the Reservation.
The land comprising the Little Tennessee River basin is mountainous (elevations to greater than 6,500 feet) and mostly rural. Nearly half of the land in the basin is federal lands (49%), most of which is forested. Most of the remaining non-federal lands are also forested. While most of the watershed is in forest lands, many retirement and second home developments are being built in the area. Most agriculture and development activities occur in river valleys and near streams due to the more level ground found in valleys. Development in or near stream corridors increases the chances for sedimentation and erosion problems. Urban and built-up lands increased the most in the upper and lower Little Tennessee River subbasins from 1982 to 1992.
Figure 1 General Map of the Little Tennessee River Basin
There are a number of high quality and outstanding resource waters in the basin. The Little Tennessee River basin contains a high number of trout water streams and waterfalls as an attraction for tourists to the area. The Little Tennessee River basin is home to two federally listed endangered mussel species: the Appalachian elktoe and the Littlewing pearlymussel. Three other important aquatic species found in the Little Tennessee River are the Slippershell mussel, the Tennessee pigtoe mussel (both are state listed as endangered) and a fish called the Spotfin chub (listed as federally threatened).
The streams and rivers of the Little Tennessee River basin are still generally of high water quality. However, there are sedimentation and erosion problems occurring in the upper Little Tennessee River and several other streams in the basin. Turbidity is common in even good areas after rainfall. Sources of sedimentation include agriculture, mining operations, development, highway construction, and forest clearing. Several areas of concern include residential and commercial development in the Highlands area (upper Cullasaja River), effects of nonpoint source runoff, sand dredging operations, streambank erosion in the upper Little Tennessee River and runoff from ruby and gem mines to tributaries near Franklin, especially Caler Fork.
The Little Tennessee River basin, is vulnerable to the effects of acid deposition, due to its high elevations, low buffering ability of streams, and areas of aged growth forests and Anakeesta rock formations. Streamwater sulfate and nitrate concentrations have increased between 1975 and 1995 as the soils have reached their absorptive capacity for these nutrients. Portions of this basin receive high rates of both sulfates and nitrogen from atmospheric deposition.
ASSESSMENT OF WATER QUALITY IN THE LITTLE TENNESSEE RIVER BASIN
An assessment of water quality information collected by DWQ and other agencies indicate that the Little Tennessee River basin has generally good water quality. There are three streams that are impaired and several streams that are threatened. Below is a summary of some key monitoring data that reflect water quality in the basin. A more detailed presentation of this information can be found in Chapter 4.
Summary of DWQ Monitoring Data
Benthic Macroinvertebrates - These are primarily bottom-dwelling aquatic insect larvae such as species of mayflies, stoneflies, and caddisflies that are used as biological indicators of water quality. Measurements of the number and diversity of these organisms at strategic sampling sites is an important means of assessing water quality.
Benthic macroinvertebrate data were collected at 30 basin assessment sites during 1994, and a total of 81 sites have been rated since 1983. Of these, 47% were Excellent, 35% were Good, 13% were Good-Fair, 4% were Fair and 1% (1 site) was Poor (the Cullasaja River above Lake Sequoyah in 1991).
Fish Community Sampling - Approximately 61 species have been collected from the Little Tennessee River basin in North Carolina. Eight of these species have been given special protection status by the North Carolina Wildlife Resources Commission or the North Carolina Natural Heritage Program under the North Carolina State Endangered Species Act. Refer to Chapter 2 for a list of these species.
Fish Tissue Analysis - Fish tissue samples were collected from the Little Tennessee River at Topoco and Calderwood Reservoir. Results of fish tissue analysis indicated that levels of metals and organics contaminants in both samples were non-detectable or present at levels below FDA and EPA criteria.
Lakes Assessments - There were ten lakes in the Little Tennessee River Basin sampled as part of the Lakes Assessment Program. These lakes were rated Fully Supporting their uses. Lake Sequoyah was rated as Support Threatened. There was also a 200-acre section of Lake Santeetlah located in the West Buffalo Creek arm of the lake that was rated as impaired due to nuisance algal blooms. These lakes, by river subbasin, are presented in Chapter 4.
Ambient Monitoring - There are seven ambient monitoring stations in the Little Tennessee River basin where water quality samples are collected monthly by DWQ. Water quality at these stations infrequently exceeded state water quality standards. The most notable feature of the water chemistry data is low pH levels starting in the winter of 1991 and extending through 1994. Present pH levels appear to be more normal. This situation occurred throughout most of the basin and is not readily explained. Atmospheric deposition may have contributed to the low pH levels during this time.
Use-Support Ratings
Use-support ratings are a method to analyze water quality information and to determine whether the quality is sufficient to support the uses for which the waterbody has been classified by the state. The word uses refers to activities such as swimming, fishing and water supply. All surface waters in the state have been assigned a classification (Appendix II).
DWQ has collected chemical and biological water quality monitoring data throughout the basin, some of which is summarized above. Available data for a particular stream segment has been assessed to determine the overall use support rating; that is, whether the waters are fully supporting, support-threatened, partially supporting, or not supporting their uses. Fully supporting and support-threatened streams are not considered impaired. Streams referred to as impaired are those rated as either partially supporting or not supporting their uses. Use support ratings in the Little Tennessee River basin, described more fully in Chapter 4, are summarized below.
Of the 2702 miles of freshwater streams and rivers in the Little Tennessee basin, use
support ratings were determined for 99% or 2684 miles with the following breakdown:
Percent
of Total 99% Fully supporting: 85% 14% <1% (0.09%) (0.18%) 1%
Miles
SUPPORTING
2657
2281
Support-threatened:
376
IMPAIRED
7.2
Partially supporting:
2.4
Not supporting:
4.8
NOT EVALUATED:
-
The majority of the streams have good to excellent bioclassifications and very few standards were violated at the ambient stations. In fact, as noted above, there are only three impaired waters in the basin. However, although water quality is high in this basin, nonpoint source pollutants such as increased sedimentation, were evident at many of the sampling sites. Also, point source discharges pose potential water quality concerns in the upper portion of the Little Tennessee River. Those waters considered Impaired or Support Threatened based on monitoring data are discussed below by subbasin.
RECOMMENDED MANAGEMENT STRATEGIES FOR RESTORING IMPAIRED WATERS AND PROTECTING THREATENED WATERS
Upper Little Tennessee (Subbasin 04-04-01)
This subbasin includes the Cullasaja River watershed in its entirety and the upper portion of the Little Tennessee River. Refer to Figure 1 for a map of subbasin boundaries.
Little Tennessee River
The Little Tennessee River above Lake Emory is considered Support-Threatened. Nonpoint pollution is considered to be the major source of degradation to this reach of the river. This portion of the river has a high rate of streambank erosion. While some streambank erosion is natural, this issue may be heightened in this subbasin by urbanization, high population growth and agricultural practices. Best management practices for the various agricultural, urban and silvicultural activities in this subbasin are hoped to provide efficient and reliable means of protecting these waterbodies. Many efforts have been undertaken to address this issue through demonstration projects and Section 319 grants. Major challenges to the installation of best management practices will be getting funding and locating willing property owners.
This section of the river is the major focus of the Little Tennessee Watershed Association (LTWA). The Little Tennessee Watershed Association, in cooperation with others, continues to conduct streambank restoration projects to stabilize the eroding streambanks often seen in this subbasin. DWQ will continue to cooperate with and support the LTWA in their efforts.
There are indications that point source dischargers in Georgia may also be affecting water quality during low flow conditions. Ambient monitoring results at the station closest to the Georgia state line (Little Tennessee at Prentiss) show few excursions from water quality standards. However, under low flow conditions and maximum concentrations of certain parameters, water quality may be negatively affected. There are three wastewater treatment facilities near the state line (Burlington Industries, Vulcan Materials and City of Dillard).
The Little Tennessee River, from the North Carolina state line to the Town of Franklin, is considered federal critical habitat for the spotfin chub. There is no legislation to back the designation of critical habitat areas to protect endangered species at the state level. However, if requested, the Wildlife Resource Commission can prepare a conservation plan for endangered or threatened species that are found in habitats that support these species.
Recommendations:
The State of North Carolina and DWQ should work more closely with Georgia's Environmental Protection Division (EPD) to assure that proper NPDES limits are established and maintained for those dischargers in the upper Little Tennessee River watershed as these streams enter North Carolina. DWQ should also continue to support efforts by the LTWA and others to address streambank erosion along the Little Tennessee.
Cartoogechaye Creek
Much of the upper watershed of Cartoogechaye Creek, a tributary to the Little Tennessee, is classified as a water supply. Although monitoring of this watershed has not indicated any problems, further sampling and protection of this resource should continue. The lower section and mouth of the Cartoogechaye Creek is Support-Threatened due to nonpoint sources of pollution including erosion from development and runoff from US 64.
Recommendations:
To protect this resource from further degradation, the sources of runoff and potential ways to reduce the inputs need to be identified and addressed. Local governments and agencies and the nonpoint source team members may be good resources for this activity.
Mill Creek
Biological sampling in 1990 and 1991 on Mill Creek above and below the Town of Highlands WWTP resulted in a Fair bioclassification. This discharge has since been moved to below Lake Sequoyah on the Cullasaja River. It is likely that current impairment is due to runoff from the highly urbanized Town of Highlands. The Town has recently developed: 1) a Land Use Plan that addresses the need to "maintain or improve the present quality of the natural environment", 2) a Soil Erosion and Sedimentation Control Ordinance and 3) Subdivision Regulations.
Recommendations:
The implementation and enforcement of these local regulations, and the pursuance of Lake Sequoyah and its watershed for drinking water supply should help minimize further water quality degradation to Mill Creek. Further monitoring of Mill Creek in light of these local ordinances to demonstrate water quality improvements should be conducted.
Upper Cullasaja River
The Cullasaja River above Mirror Lake at Highlands (from its source to SR 1545, a distance of approximately 4.8 miles), is impaired due to nonpoint source pollution. The Cullasaja River is surrounded by areas of high population growth accompanied by accelerated urbanization. Nonpoint sources of pollution in the upper Cullasaja are likely from stormwater runoff, home construction sites, numerous golf courses and roads.
The construction process and poor access road design are thought to be significant causes of erosion. As roads are graded, the spoil is placed in roadside ditches and carried to streams through runoff. Many private drives have 18-19% slopes, even though 12% is considered to be the maximum permissible slope in sound engineering design. The steep slopes and thin soils found in this area make this region particularly vulnerable to land disturbances.
Further downstream from SR 1545 the Cullasaja River has a Support-Threatened status, which may be due to continued development as well as the addition of fertilizers from surrounding golf courses and residential construction.
In 1985, the Town of Highlands applied for an increase in the discharge from its wastewater treatment plant along with a relocation of the discharge to the Cullasaja River. Effluent limits and monitoring requirements for relevant pollutants were determined by Division staff for the expanded discharge to protect instream water quality. In the 1990's numerous public hearings were held and legal suits were filed due to concerns that the discharge would adversely affect local water uses (including baptismal services) and that low flow estimates of the waterbody were not correct. The final permit included effluent limits designed to protect both water quality and the various public uses of this waterbody. The discharge location is downstream of Lake Sequoyah and the impaired section of the river discussed above.
Recommendations:
This river, as well as the surrounding waterbodies, will be very dependent on best management practices for construction and long-term urban planning. The implementation and enforcement of local land use, subdivision and sediment controls, as discussed under Mill Creek, are needed to minimize growth impacts. Additional efforts may be needed to restore full use to these waters.
DWQ's Regional Office in Asheville has added two additional ambient monitoring sites on the Cullasaja River downstream of the Highlands wastewater treatment effluent. DWQ will continue to monitor these sites monthly to assess the impacts of the effluent on downstream water quality.
Iotla Creek
Iotla Creek is Support-Threatened and appears to be affected by both sedimentation and high scouring of the substrate during rainfall events.
Recommendations:
To protect this resource from further degradation, the sources of runoff and potential ways to reduce the inputs should be identified. Local governments and agencies and the nonpoint source team members may be good resources for this activity.
Cowee Creek
Cowee Creek was selected to assess the effects of discharges from 8 ruby and gem mines and from Perry's Water Gardens. During macroinvertebrate sampling the site was very turbid, the stream bottom was heavily embedded with siltation and macroinvertebrate populations indicated nutrient enrichment.
Recommendation:
Additional biological surveys should be conducted to determine the sources of enrichment.
Lower Little Tennessee Subbasin (04-04-02)
The Lower Little Tennessee subbasin is the largest tributary watershed to the Little Tennessee River. This subbasin includes the Tuckasegee River with flow from the Oconaluftee River (refer to Figure 1 for map of the subbasin boundaries). Many of the High Quality and Outstanding Resource Waters within the Little Tennessee River basin are located in this subbasin.
Two waterbodies within this subbasin have a Support-Threatened status. Scott Creek, near the Town of Sylva, and Beech Flats Prong, a headwater of the Oconaluftee River.
Scott Creek
Scott Creek, a tributary to the Tuckasegee River, has a use-support rating of Support Threatened. The causes and sources of this rating have not been determined, but are likely due to nonpoint pollution.
Recommendation:
To protect this creek from further degradation, potential pollutants should be identified. Local governments and agencies, along with the nonpoint source team members, may be good resources for identifying the problem and solutions for restoring this waterbody.
Beech Flats Prong
Construction of US 441 in the Great Smoky Mountains National Park near Clingman's Dome at Newfound Gap exposed Anakeesta rock formations (locally known as "hot rocks"), resulting in low pH values and heavy metal concentrations in the headwaters of Beech Flats Prong. The stream reach most affected is limited in length to less than one mile. This long-term source of pollution has resulted in the classification of Support -Threatened for this stream. The National Park Service is extremely limited in available funds and has no plans to remediate this situation.
Tuckasegee River
Much of the southeast corner of this subbasin in the headwaters of the Tuckasegee River is designated as a water supply. Cedar Cliff, Bear Creek and Thorpe Reservoir (Lake Glenville) Reservoirs are classified water supply. In April 1997, the Environmental Management Commission (EMC) voted to implement a supplemental classification of Alternative HQW Rule for Thorpe Reservoir (Lake Glenville), Hurricane Creek and Laurel Branch. Under the Alternative HQW Rule, sedimentation and erosion control requirements as implemented by the NC Division of Land Resources will apply to areas within one mile and draining to the HQW designated waters (refer to Section 6.5 for further details).
Recommendations:
DWQ will cooperate with the Division of Land Resources to implement the Alternative HQW Rule for Thorpe Reservoir, Hurricane Creek and Laurel Branch.
Many of the waters within the Cherokee Indian Reservation have High Quality classifications. Because of this, more communication and cooperation needs to take place with Cherokee Indian Reservation officials. Continued pressure to build and urbanize these areas will require attention to best management practices for construction and long term planning of urban areas. Refer to Section 6.5 for regulations and strategies applying to the Outstanding Resource Waters and High Quality Waters designations.
Fontana Lake
In the western section of this subbasin, Fontana Lake has water supply and HQW classifications in various streams around the lake. Development around this waterbody will need to be monitored closely to insure that sedimentation and nutrient enrichment of the reservoir does not occur.
Nantahala River (Subbasin 04-04-03)
This is the smallest subbasin in the Little Tennessee River basin, containing the majority of the Nantahala River watershed (refer to Figure 1 for subbasin boundary map). Much of the headwaters of the Nantahala River are classified as Outstanding Resource Waters.
White Oak Creek
White Oak Creek has a Partially Supporting status based on macroinvertebrate sampling. The impairment is due to impacts from a trout farm discharge to this waterbody. The impacts from the trout farm are localized to a short stream length. The trout farm implemented best management practices to reduce the amount of particulates in the discharge. This stream, like other streams with trout farms discharging to them, is more affected by the discharge during low flow conditions and higher water temperatures.
Recommendation:
Continued monitoring of this site to verify the effects of best management practices on stream water quality is recommended.
Silvermine Creek and Dicks Creek
Silvermine Creek and Dicks Creek, both tributaries to the Nantahala River, have a Support-Threatened status. The source of this impact is unknown and further monitoring will be required to verify its current status and possible causes.
Nantahala River
This is one of the most heavily used rivers in the southeast for primary recreation. Due to the popularity of this river for recreation, future development along the river could negatively impact water quality. This river serves the area as a valuable natural and economic resource.
Recommendation:
Local stakeholders (landowners, businesses and governments) should organize to assure the water quality of the river is protected from uncontrolled growth.
Cheoah River (Subbasin 04-04-04)
The major waterbodies in this subbasin are the Cheoah River and Santeetlah Lake (refer to Figure 1 for subbasin boundary map).
West Buffalo Creek Arm of Santeetlah Lake
While not impaired, the West Buffalo Creek arm of the lake has been observed with nuisance algal blooms. This condition appears to be a result of excessive nutrient loading from trout farms located on this creek and Snowbird Creek.
Recommendations:
Operation of these farms should be examined to determine whether cost-effective measures exist to reduce nutrient discharges to these streams. Also, consideration should be given to not allowing any additional farms on these streams until this problem can be corrected.
POTENTIAL RECLASSIFICATION TO HIGH QUALITY WATERS OR OUTSTANDING RESOURCE WATERS
DWQ monitoring has found several waters that may be considered eligible for reclassification to HQW or ORW (Table 1) because they have excellent water quality. At present, the Nantahala River/Lake is pending reclassification to ORW. Wesser Creek (Swain County) is pending reclassification to include the supplemental classification of Tr (Trout).
Table 1: Potential HQW/ORW Reclassifications for the Little Tennessee River Basin
| Subbasin | Catchment | Streams |
| Upper Little Tennessee River (04-04-01) | Nantahala National Forest | Coweeta Creek and nearby catchments |
| Nantahala River (04-04-03) | Nantahala River above Lake | upper White Oak Creek |
| Cheoah River (04-04-04) | Nantahala National Forest |
|
Thorpe Reservoir (Lake Glenville) Reclassification to Alternative HQW Rule
In 1989, DWQ received a request to determine whether Thorpe Reservoir would classify as HQW. DWQ biologists determined that Thorpe Reservoir had Excellent water quality and was eligible for reclassification. A public hearing and comment period was held in August 1994 on the proposed reclassification. Due to significant public interest and debate, the Environmental Management Commission instructed DWQ to proceed back to rule making with two options: Option One - Alternative HQW Rule and Option Two - Water Quality Management Plan. A public meeting and comment period was held in November 1996. A summary of public comments and DWQ staff recommendations were presented to the Environmental Management Commission (EMC) in April 1997. The EMC voted to implement Option One - Alternative HQW Rule for Thorpe Reservoir (Lake Glenville), Hurricane Creek and Laurel Branch.
Under both options, wastewater discharge requirements were identical and no additional stormwater requirements were applicable. Under the Alternative HQW Rule, sedimentation and erosion control requirements as implemented by the NC Division of Land Resources will apply to areas within one mile and draining to the HQW designated waters.
MAJOR WATER QUALITY ISSUES AND RECOMMENDED MANAGEMENT STRATEGIES
A. Growth and Development
Growth Trends and Water Quality
There have been significant growth trends in the Little Tennessee River basin and these trends are expected to continue. The majority of growth has occurred in the upper and lower Little Tennessee River subbasins. Impacts to water quality from growth and development can include sedimentation, streambank erosion and degradation from a variety of fertilizers, chemicals, and road salts.
Traditionally, growth and development within the basin have occurred mostly along streams and rivers where lands are less steep. Growth along waterways can have a significant negative impact on water quality if construction activities are not undertaken with proper care. Recently, construction activities have also occurred on mountain ridges and slopes to obtain views of valleys and ridges. Building on slopes can be particularly harmful to water quality if appropriate erosion and sedimentation control measures are not used. Slopes tend to have soil types that are more shallow and unstable than those in valleys. Often, driveways to home sites on slopes are greater than 12% slope, the recommended slope for reducing erosion potential (Willett, pers. comm.).
In recent years, there has been a wave of development from Atlanta, Georgia to the North Carolina state line. Parcels of property have sold rapidly throughout many areas of the Little Tennessee River basin. To date, most of these parcels have not been built upon because they are held by out-of-state developers that intend to subdivide these large parcels when the market is most receptive. When these developers perceive that the timing is right for building out these parcels, the rate of growth within this basin will accelerate quickly and may be too fast for local governments to keep pace with (Willett, pers. comm). The basin also receives a tremendous seasonal population fluctuation.
Influence of the Cherokee Reservation Gambling Casino on Growth and Water Quality
The Cherokee Reservation gambling casino, the only legalized gambling casino in the Southeast, is geographically situated to become "...one of the primary gambling centers east of the Mississippi. It will be centrally located to many eastern cities and is within 500 miles of over half the U.S. population " (Willett and Eller, 1995). The development of the gambling casino on the Cherokee Indian Reservation is estimated to attract an additional 2 million visitors per year to the Reservation (Willett and Eller, 1995). It is expected that these visitors will tour surrounding areas.
A recent NC Division of Community Assistance study (Willett and Eller, 1995) suggests that western North Carolina will be permanently impacted by the development of the Cherokee
Indian Reservation gambling casino. In addition to other effects not related to water quality, the region is likely to experience:
The need for additional state support for road improvements. Road improvements will entail construction and the potential for increased erosion and sedimentation, as well as the potential for increased effects of acid runoff to streams if Anakeesta rock formations are exposed (See Multi-Lane Highways discussion below);
Increased traffic which may result in increased water quality impacts through stormwater runoff and exhaust emissions that contribute to acid rain (See discussion on acid deposition below);
The need for higher taxes to pay for increased local government services (water and sewer improvements alone are estimated at $5.6 million); and
The diversion of dollars from existing businesses to gambling enterprises (termed "economic cannibalism", Goodman 1994) and displacement (occurs when non-gambling tourists travel to other areas to avoid increased traffic, lack of hotel accommodations, and avoidance of the gambling atmosphere (Willett and Eller, 1995)) in relation to the tourism industry.
The gambling casino may have effects on water quality as the outlying areas experience accelerated commercial activity due to displacement and spill-over. Commercial activity in these outlying areas will increase the demand for roads and services. In addition, strong economic activity may be viewed as an additional reason to build second homes or establish a new business by an outside entrepreneur. Construction of homes, commercial areas and roads increase stormwater runoff and sedimentation problems. This demand for goods, services and homes will need to be planned for and managed in order to reduce the potential for degradation of water resources. Refer to section 6.6 for recommended management strategies relating to proper planning for growth and development.
Multi-Lane Highways
The NC Division of Community Assistance report estimates an additional 1,040,000 vehicles each year along six major traffic routes in western North Carolina. This dramatic increase in traffic will require significant changes to traffic flow patterns throughout western North Carolina. At present, there are six major corridors (See Chapter 2) planned by the NC Department of Transportation for improving traffic flow. These thoroughfares are expected to relieve the present congestion experienced by travelers in the vicinity of the Cherokee Reservation and provide opportunities for easy access to rather remote areas of the state.
However, during road construction there are also increased risks for sediments to enter surface waters. Also, Anakeesta rock formations are frequently found in this region of the state. These rock formations can also significantly impact water quality if not handled properly. Chapter 4 provides more detail on water quality problems associated with Anakeesta rock formations and Chapter 5, Section 5.6.2 describes the N.C. Department of Transportation road construction policies in areas with Anakeesta rock formations. When roads are built along streams or rivers, there is also the increased potential for toxic and synthetic substances to enter these waters as runoff.
Acid Rain/Deposition
The developments of thoroughfares will make it easier for tourists and developers to access and use the area. As traffic flow increases, the emission of nitrous oxides from vehicles to the atmosphere will increase. Nitrous oxides react with volatile organic compounds to create ozone. At times, ozone levels in the Great Smoky Mountains National Park can reach levels nearly double the average ozone level in Raleigh (News and Observer, Sept. 1, 1996). The man-made pollutants that trouble the peaks of the Smokies is creating more widespread problems throughout the Southern Appalachians, as noted by the Southern Appalachian Man and the Biosphere (SAMAB) The region of the GSMNP presently receives some of the most acidic deposition in the country. This high amount of deposition combined with low stream buffering ability and the fact that the capacity of the soils to absorb excess nutrients has been reached in many areas, has produced many low pH streams at higher elevations and higher stream nitrogen levels than in any other national park (News and Observer, Sept. 1, 1996). Refer to Chapter 4 for a more thorough discussion of the effects of acid deposition of high elevation streams in western North Carolina.
Recommendations for Addressing Growth Issues in Western North Carolina
Proactive planning efforts at the local level are needed to assure that development is done in a manner that maintains the high water quality that is presently attracting people to the area. Local governments are responsible for the institution of programs and initiatives to balance economic growth with water quality protection. The following strategies are examples of a few of the initiatives local governments could pursue.
Develop a Regional Organization. Over time, it will become important for western North Carolina to develop a regional organization representative of the eight counties (covering the Hiwassee, Little Tennessee, Savannah and French Broad River basins) that will be affected the most by the gambling casino (Willett and Eller 1995). While the focus of this group would primarily be aimed at economic development, a separate task force should be developed to conduct an analysis of the impacts of the casino on natural resources. Several economic development organizations are already in existence in the region.
Develop a variety of land use management tools. Land use management issues will need to be addressed either by the local governments or by the natural resource task force of the regional organization. The lack of land use planning can have long-term negative impacts on water quality. Chapter 5, Section 5.6.3 presents information on local governments that have some land use planning in effect.
Pursue Funding for Local Water Quality Protection Projects. The Clean Water Management Trust Fund (see Chapter 5, Section 5.8) may be a source of funding to assist local governments in obtaining a balance between economic growth and protecting surface waters of the state. Local governments will need to take responsibility for planning for the additional tourists and growth and development. This region of the state typically has a lower tax base than other areas of the state. Problems with aging infrastructure are also typical, especially for the small towns in the region. The Clean Water Management Trust Fund can be used for many purposes including: acquiring land for conservation easements and riparian buffers, restoring degraded lands to protect water quality, repairing failing waste treatment systems and septic tank systems and improving stormwater management. Local governments and regional organizations should consider pursuing funding through the Clean Water Management Trust Fund as a means to upgrade infrastructure and manage land to protect water quality. Contact the Executive Director, Dave McNaught at (919) 974-5497 for more information.
Support Local Initiatives for Water Quality Protection. Local governments and regional organizations can also promote local efforts to protect areas by developing greenways and bikeways, supporting citizen monitoring efforts and protecting lands near surface waters and wetlands.
Encourage participation in the Straight Pipe Elimination Amnesty Program. This program is described further in Appendix VI.
At the state level, it may be possible to develop an incentive program for local governments to encourage the development and implementation of land use plans. This incentive policy has been applied in other states. The premise of an incentive program is to provide partial funding to staff the program if a local government develops a land use plan and then enforces its plan. If the land use plan is not developed or enforced, no funding would be available. Such a program has not yet been developed in North Carolina.
B. Urban And Industrial Stormwater Control
Urban stormwater runoff can be a significant contributor to water quality problems. In the Little Tennessee River basin, urban development is relatively limited at present. As land is converted to impervious surfaces with construction of housing developments and commercial areas, careful attention to stormwater control will be more important. Stormwater problems are likely to be centered around the urban areas in the basin. There are no municipalities in the Little Tennessee River Basin required to obtain permits to manage stormwater runoff within their jurisdiction.
Recommendations:
The best time to address urban stormwater impacts are when it is most effective and least costly to do so -- before development occurs. Numerous studies have demonstrated a serious decline in the health of receiving waters when 10 to 15 percent of a watershed is turned into impervious surfaces (Schueler, 1995).
The entire community plays a role in controlling the quality and quantity of urban stormwater. The following is a list of recommendations for local governments, citizens, businesses, developers, and state agencies.
Mapping of the municipal storm sewer systems and outfall points, and developing procedures to update this information.
Evaluating existing land uses in the local government's jurisdictional area to determine where sources of stormwater pollution may exist. In addition, local government activities and programs could be evaluated to determine where existing activities address stormwater management in some way, or could be modified to do so.
Developing educational programs to inform citizens of activities that may contribute pollutants to stormwater runoff (dumping oil, paint or chemicals down storm drains) and offering ways of carrying out such activities in an environmentally sound manner. Storm drain stenciling is a good example of a low cost educational tool.
Developing programs to locate and remove illicit connections (illegal discharge of non-stormwater materials) to the storm sewer system. These often occur in the form of floor drains and similar connections.
Reviewing local ordinances pertaining to parking, curb and gutter and open space requirements. Many of these local ordinances could be modified to enhance water quality protection from urban stormwater runoff impacts. Maintaining riparian buffer strips along streams is an example.
Creating wetlands along streams in urbanized areas of the watershed to receive stormwater runoff can be an effective way to remove pollutants by burial, chemical breakdown, and/or assimilation into plant tissue. Careful design of these systems is needed in order to adequately handle the altered hydraulics of urban areas.
Throughout the Little Tennessee River basin, various industrial activities with point source discharges of stormwater are required to be permitted under the federally mandated National Pollutant Discharge Elimination System (NPDES) stormwater program. These include activities related to manufacturing, processing, materials storage areas and construction activities with greater than five acres of disturbance. These dischargers must develop Stormwater Pollution Prevention Plans (SWPPP) to minimize and control pollutants discharged from their stormwater systems. These SWPPPs are subject to review and modification by the permitted facilities and DWQ to assure that management measures are appropriate.
C. Erosion And Sedimentation
Sedimentation has been identified as a source of stream impairment in the Little Tennessee River basin. Sedimentation has also been identified as a source of water quality degradation in the basin, resulting in the classification rating of Support Threatened of some waters. Sedimentation is a widespread nonpoint source-related water quality problem that results from land-disturbing activities such as land clearing, agriculture and development (e.g., highways, shopping centers, and residential subdivisions).
Such land disturbing activities can be especially harmful in the mountains where slopes are steep and rainfall is frequent. Also, since the mountain counties are increasingly popular areas for home, commercial and golf course construction, there is increasing potential for sediment to enter streams during land clearing and construction activities. After construction is complete, poorly designed roads, trails, and driveways may continue to erode into water bodies. In addition, as the amount of impervious surface area increases, the rate and volume of runoff after storms can, in turn, cause erosion of streambanks and flooding.
The degree of sedimentation affects both the habitat of aquatic macroinvertebrates and the quality and amount of fish spawning and rearing habitat. Sedimentation is one of the main factors limiting trout production in western North Carolina. Inorganic sediments can affect trout productivity in three ways: direct effects - impairment of respiration, feeding habits, and migration patterns; reduced egg hatching and emergence due to decreased water velocity and dissolved oxygen; and, trophic effects - reduction in prey (macroinvertebrates). As fine suspended solids increase in the waters, the dissolved oxygen, permeability, and apparent velocity decrease (West, date unknown). Erosion and sedimentation resulted in lower hatching and emergence success of trout embryos, reduced trout biomass and growth rates when comparing two streams in western North Carolina (West et. al, 1982).
Sedimentation impacts streams in several other ways. Eroded sediments may gradually fill lakes and navigable waters and may increase drinking water treatment costs. Sediment also serves as a carrier for other pollutants including nutrients (especially phosphorus), toxic metals, pesticides, and road salts.
Recommendations:
For each of these major types of land-disturbing activities, there are programs being implemented by various government agencies at the state, federal and/or local level to minimize
soil loss and protect water quality. Some of these programs are listed in Table 6.6 and are briefly described in Appendix VI.
Construction activities, private access roads, and state road construction are sources of sediment and management strategies are presented in the plan for reducing sedimentation to streams in the Little Tennessee River basin. The responsibility for controlling sediment from construction activities falls on many shoulders. Those with the greatest responsibility include: homeowners, developers/contractors, local governments, and the NC Division of Land Resources.
Improperly designed, constructed, and maintained private access roads are a significant source of sediment in the mountains. Often, landowners do not realize the importance of building driveways for lasting service. Most of the responsibility for an access road rests on the landowner. However, local governments, citizens, and state/federal agencies can also make their contribution to solving this problem.
Table 2 Sediment Related Activities and Groups with Greatest Responsibility
| Activity | Responsibility Groups | Chapter 6 Table Reference (with Recommended Measures) |
| Construction |
|
Table 6.6 |
| Private Roads |
|
Table 6.7 |
| State Roads |
|
Table 6.8 |
D. Fecal Coliform Bacteria
Fecal coliform bacteria are typically associated with the intestinal tract of warm-blooded animals and are widely used as an indicator of the potential presence of disease-causing bacteria and viruses. They enter surface waters from a number of sources including failing onsite wastewater systems, broken sewer lines, improperly treated discharges of domestic wastewater, pump station overflows, straight piping and runoff carrying livestock and wildlife wastes.
There are no monitored waterbodies in the Little Tennessee River basin where fecal coliform bacteria standards have been exceeded in at least 25% of the samples taken by DWQ. However, the Little Tennessee River at Prentiss and Cartoogechaye Creek have had a high percentage of samples greater than the standard of 200/100ml.
Recommendations:
Several general management strategies for addressing fecal coliform contamination include:
Proper maintenance and pumping of the septic tank every three to five years.
Maintenance and repair of sanitary sewer lines by WWTP authorities.
Elimination of direct unpermitted discharges of domestic waste (also known as "straight piping").
Proper management of livestock to keep wastes from reaching surface waters.
Encouragement of local health departments to routinely monitor waters known to be used for body contact recreation (e.g., swimming and tubing).
The 1996 General Assembly established a program designed to eliminate domestic sewage or wastewater discharges from both direct (straight pipe) and from overland flow of failing septic systems. The focus of the program contains three components:
the identification and elimination of domestic sewage discharges into streams proposed or currently used for public water supplies,
an amnesty period to end December 31, 1997 during which time violations for identification of domestic dischargers will not be incurred, and
a public education program about the amnesty period will be implemented. The majority of the funds allocated to this program are recurring funds.
Septic tanks are used widely throughout this basin, particularly since many citizens live outside of the service area of a regional wastewater treatment plant. Unfortunately, many citizens are not aware of how to care for their septic tanks. Some of the actions that homeowners, local governments, and state and federal agencies can take to reduce pollution from septic tanks are listed in Table 6.13.
E. Toxic Substances
Toxic substances, or toxicants, routinely regulated by DWQ include metals, organics, chlorine, and ammonia, as described in Chapter 3.
The waters of the Little Tennessee River basin need to be protected from immediate acute effects and the residual chronic effects of toxic substances. Toxic limitations for point source discharges are based on the volume of the effluent released and the 7Q10 flow condition of the receiving stream. In the Little Tennessee River Basin, there are three facilities that have quarterly chronic toxicity test requirements: Franklin WWTP, Bryson City WWTP and Tuckasegee WSA WWTP. None of these plants discharge to streams with HQW or ORW classifications. All three plants have consistently passed the toxicity tests. The Town of Highlands is not required to conduct toxicity testing because the town is a minor discharger (500,000 gallon per day flow limit) with 100 percent domestic waste. Minor dischargers with 100 percent domestic waste are given the option of ammonia limits (9 mg/l summer and 20 mg/l winter) or toxicity test requirements. The Town of Highlands opted for ammonia limits, which they have consistently met.
Toxics from nonpoint sources of pollution typically enter streams during storm events through runoff from roads, parking lots, agricultural lands or golf courses. In the Little Tennessee River basin, low pH levels have been observed in many high elevation streams. These low pH levels have been attributed to chronic acid deposition and the low buffering capacity of high elevation streams in the basin. This issue is discussed further in Chapter 4.
Recommendations:
Continued research and monitoring will be important to fully understand the relationship between acid deposition and water quality and for furthering the development of policies to reduce impacts to surface waters from the chronic introduction of atmospheric pollution.
For wastewater treatment plants, DWQ will continue to require toxicity testing at qualifying facilities and to correct problems as necessary.
Chapter 6 also includes recommendations for residents to play their part in keeping toxic substances out of streams and lakes. Tables 6.11 and 6.12 in Chapter 6 contain environmentally-friendly recommendations for lawn, automobile and home care.
F. Nutrients
Control of nutrients is necessary to limit algal growth potential, to assure protection of the instream chlorophyll a standard and to avoid the development of nuisance conditions on the state's waterways. Point source controls are typically NPDES permit limitations on total phosphorous (TP) and total nitrogen (TN). Nonpoint controls of nutrients generally include best management practices (BMPs) to control nutrient loading from areas such as agricultural land and urban areas.
Recommendations:
In the Little Tennessee River basin nutrient enrichment from point sources has been implicated as a potential source of water quality degradation on White Oak Creek, Cowee Creek, the West Buffalo Creek arm of Santeetlah Lake and in Lake Sequoyah near Highlands. These situations will continue to be monitored.
In addition, DWQ is aware of preliminary plans to site net pen trout farm operations in lakes in the Little Tennessee River basin. These net pen operations, if large enough in scale, can significantly increase phosphorous loading to lakes and result in local to lake-wide eutrophication. No net pen operations exist in North Carolina at present. DWQ envisions that requests for net pen production of trout be permitted only as pilot projects. Refer to Chapter 7, Section 7.3.6 for more details.
FUTURE INITIATIVES IN THE LITTLE TENNESSEE RIVER BASIN
Nonpoint Source Control Strategies and Priorities/Nutrient Reduction Efforts
Improving knowledge of and controlling nonpoint source pollution will be a high priority over the next five years. Nonpoint source pollution is primarily responsible for the impaired and threatened waters in the Little Tennessee River basin. The following two initiatives are underway to address the protection of surface waters from nonpoint sources of pollution.
Establishment of nonpoint source basin teams in each basin. DWQ has begun to establish a nonpoint source team in each of the state's 17 major river basins. A nonpoint source team has been established in the Little Tennessee River basin. Refer to Section 7.2.2 of Chapter 7 for further description.
Interagency Water Quality Monitoring. DWQ has begun the process of coordinating with other natural resource agencies on the idea of interagency water quality monitoring across the state. Refer to Section 7.2.3 of Chapter 7 for more information.
National Pollutant Discharge Elimination System (NPDES) Program
In the next five years, efforts will be continued to:
improve compliance with permitted limits;
improve pretreatment of industrial wastes to municipal wastewater treatment plants so as to maintain reduced toxicity in effluent wastes;
encourage pollution prevention at industrial facilities in order to reduce the need for pollution control;
require dechlorination of chlorinated effluents or the use of alternative disinfectants;
require multiple treatment trains at wastewater facilities; and
require plants to begin plans for expansion well before they reach capacity.
Longer-term objectives will include refining overall management strategies after obtaining feedback on current management efforts during the next round of water quality monitoring. Long-term point source control efforts will stress reduction of wastes entering wastewater treatment plants, seeking more efficient and creative ways of recycling byproducts of the treatment process (including nonpotable reuse of treated wastewater), and keeping abreast of and recommending the most advanced wastewater treatment technologies.
Use of Discharger Self-Monitoring Data
DWQ will continue to explore the possibilities of using discharger self-monitoring data to a greater degree to augment the data it collects through the programs described in Chapter 4. Quality assurance, timing and consistency of data from plant to plant would have to be addressed. Also, a system would need to be developed to enter the data into a computerized database for later analysis. One method of data collection that is currently being explored includes developing a comprehensive list of monitoring sites for the basin that would be monitored by an association of NPDES dischargers with data input to STORET. A basinwide sampling program has been established for dischargers in the Neuse River Basin and to date appears to be successful.
Coordinating Basinwide Management With the Construction Grants and Loans Program
The potential exists to use the basinwide planning process to identify and prioritize wastewater treatment plants in need of funding through DWQ's Construction Grants and Loan Program. Completed basin documents are provided to the Construction Grants and Loan office for its use.
Improved Data Management and Expanded Use of Geographic Information System (GIS) Computer Capabilities
DWQ is in the process of centralizing and improving its computer data management systems. Most of its water quality program data including permitted dischargers, effluent limits, compliance information, water quality data and stream classifications, will be put in a central data center which will be made accessible to most staff at desktop computer stations. Much of this information is also being entered into the state's GIS computer system. As all this information is made available to the GIS system, including land use data from satellite or air photo interpretation, and as the system becomes more user friendly, the potential to graphically display the results of water quality data analysis will be tremendous.
