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HomeMy WebLinkAboutNC0021407_Environmental Assessment_20030225NPDES DOCIMENT SCANNIN`: COVER SHEET NC0021407 Highlands WWTP NPDES Permit: Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Instream Assessment (67b) Speculative Limits Environmental Assessment EA)) Document Date: February 25, 2003 This document is printed on reuse paper - ignore any content on the reverse side 1soyi Dut - - 1 t L1 v, ,V104' ENVIRONMENTAL ASSESSMENT FOR 201 FACILITIES PLAp AMENDMENT TO OF GHLANDS /VoU 2/ L/O v) WASTEWATER TREATMENT PLANT EXPANSION MACON COUNTY, NORTH CAROLINA State Clearinghouse Review Number 02E-4300-0307 NC DENR Review Number 1204 May 2002 - First Draft EA for Lead Agency Review 26 August 2002 - Second Draft EA for DENR Review 19 February 2003 - Final EA for Clearinghouse Review Lead Agency Contact: Mr. J. Todd Kennedy N.C. Division of Water Quality 1617 Mail Service Center Raleigh, N.C. 27699-1617 (919) 733-5083 ext 555 Municipal Contact: Mr. Richard Betz Highlands Town Administrator P.O. Box 460 Highlands, NC 28741 (828) 526-2118 Prepared By: S F E B 2 5 2003 DENR - WATER QUALITY POINT SOURCE BRANCH Project Engineer: Mr. Michael Osbome, P.E. W.K. Dickson & Company 616 Colonnade Drive Charlotte, NC 28205 (704) 334-5348 Robert J. Goldstein & Associates, Inc. ENVIRONMENTAL CONSULTANTS 8480 Garvey Drive Raleigh, North Carolina 27616-3175 Tel (919) 872-1174 Fax (919) 872-9214 www.ridaCarolina.com RJG&A Project 2154 TABLE OF CONTENTS 1.0. PROPOSED PROJECT DESCRIPTION. 1 2.0. NEED FOR THE PROJECT. 1 2.1. PROJECT HISTORY AND EXISTING FACILITIES. 1 2.2. POPULATION GROWTH AND FLOW PROJECTIONS. 2 3.0. ALTERNATIVES ANALYSIS 3 3.1. No ACTION ALTERNATIVE 3 3.2. SPRAY IRRIGATION OF TREATMENT PLANT EFFLUENT. 3 3.3. CONNECT TO CASHIERS SYSTEM. 4 3.4. CONNECT TO FRANKLIN SYSTEM 4 3.5. ON -SITE WASTEWATER SYSTEM FOR TREATMENT PLANT EFFLUENT. 5 3.6. EXPAND HIGHLANDS WWTP AND STREAM DISCHARGE (PREFERRED ALT) 5 3.7. ADDITIONAL CONSIDERATIONS 6 4.0. EXISTING ENVIRONMENT. 7 4.1. TOPOGRAPHY AND SOILS. 7 4.2. LAND USE. 7 4.3. PRIME AND UNIQUE FARMLANDS 8 4.4. PUBLIC, SCENIC, AND RECREATIONAL AREAS 8 4.5. ARCHAEOLOGICAL AND HISTORIC RESOURCES. 8 4.6. AIR QUALITY 8 4.7. NOISE LEVELS. 9 4.8. WATER RESOURCES. 9 4.8.1. Surface Water Hydrology. 9 4.8.2. Surface Water Usage Classifications. 10 4.8.3. Existing Surface Water Quality. 11 4.8.3.1. Cullasaja River Above Lake Sequoyah. 11 4.8.3.2. Lake Sequoyah. 12 4.8.3.3. Cullasaja River Below Lake Sequoyah. 12 4.8.4. Groundwater Resources 14 4.9. FISH AND AQUATIC HABITATS. 14 4.10. WILDLIFE AND TERRESTRIAL HABITATS. 15 4.11. FORESTRY RESOURCES. 15 4.12. JURISDICTIONAL WETLANDS AND WATERS. 16 4.13. PROTECTED SPECIES 16 5.0. PREDICTED ENVIRONMENTAL IMPACTS. 17 5.1. TOPOGRAPHY AND SOIL IMPACTS. 17 5.2. LAND USE IMPACTS 18 5.3. PRIME AND UNIQUE FARMLANDS IMPACTS. 18 5.4. PUBLIC, SCENIC, AND RECREATIONAL AREAS IMPACTS. 19 5.5. ARCHAEOLOGICAL AND HISTORIC RESOURCES IMPACTS. 19 5.6. AIR QUALITY IMPACTS. 19 5.7. NOISE LEVEL IMPACTS. 19 5.8. WATER RESOURCES IMPACTS. 20 5.9. FISH AND AQUATIC HABITAT IMPACTS. 21 11 �.r 5.10. WILDLIFE AND TERRESTRIAL HABITAT IMPACTS. 21 5.11. FORESTRY RESOURCE IMPACTS. 21 5.12. JURISDICTIONAL WETLAND IMPACTS. 22 5.13. PROTECTED SPECIES IMPACTS. 22 5.14. INTRODUCTION OF TOXIC SUBSTANCES 23 6.0. MITIGATIVE MEASURES 23 6.1. MITIGATION FOR DIRECT IMPACTS. 23 6.2. MITIGATION FOR INDIRECT AND CUMULATIVE IMPACTS. 24 6.2.1. Zoning and Watershed Ordinance. 24 6.2.2. Subdivision Ordinance. 25 6.2.3. Soil Erosion and Sedimentation Control Ordinance 26 6.2.4. Ordinance Regulating the Draining of Impoundments. 27 6.2.5. Lake Ordinance and Reservoir Recreation Plan. 28 6.2.6. Other Water Quality Protection Measures. 28 7.0. STATE AND FEDERAL PERMITS REQUIRED 29 8.0. LITERATURE CITED 30 9.0. QUALIFICATIONS OF PREPARERS 32 TABLE 1. AMBIENT AIR QUALITY DURING 1998-99 IN THE VICINITY OF MACON COUNTY NC 34 TABLE 2. SITE INDICES FOR TIMBER PRODUCTION ON SOILS IN MACON COUNTY, NC. 35 TABLE 3. JURISDICTIONAL WETLAND IMPACTS IN THE PROJECT AREA. 36 TABLE 4. STREAM IMPACTS IN THE PROJECT AREA. 36 TABLE 5. PROTECTED SPECIES KNOWN FROM MACON COUNTY, NC. 37 FIGURE 1. TOWN OF HIGHLANDS WWTP SITE AND WASTEWATER SERVICE AREA 39 FIGURE 2. SITE PLAN OF PROPOSED HIGHLANDS WWTP IMPROVEMENTS 40 FIGURE 3. DWQ SURFACE WATER CLASSIFICATIONS IN HIGHLANDS AND SURROUNDING AREA41 FIGURE 4. PROTECTED WATER SUPPLY WATERSHEDS IN THE HIGHLANDS SERVICE AREA 42 FIGURE 5. STREAM AND WETLAND IMPACTS IN THE PROPOSED SEWERLINE CORRIDORS. 43 Appendix A. Protected Species Descriptions, Habitat, and Likelihood in the Project Area. A.1. Rafinesque's Big -eared Bat (Corynorhinus rafinesquii). 44 A.2. Northern Long-eared Bat (Myotis septentrionalis). 44 A.3. Indiana Bat (Myotis sodalis). 44 A.4. Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus). 45 A.5. Eastern Woodrat (Neotoma floridana haematoreia). 45 A.6. Southern Rock Vole (Microtus Chrotorrhinus carolinensis). 45 A.7. Long-tailed Shrew (Sorex dispar). 45 A.8. Southern Water Shrew (Sorex palustris punctulatus). 45 A.9. Southem Pygmy Shrew (Sorex hoyi winnemana). 46 A.10. Southem Appalachian Saw -whet Owl (Aegolius acadicus). 46 A.11. Cooper's Hawk (Accipiter cooperii). 46 III A.12. Peregrine Falcon (Falco peregrinus). 46 A.13. Bachman's Sparrow (Aimophila aestivalis). 47 A.14. Olive -sided Flycatcher (Contopus coopen). 47 A.15. Southern Appalachian Black -capped Chickadee (Poecile atricapilla practice) 47 47 A.16. Appalachian Bewick's Wren (Thryomanes bewickii altus). 48 A.17. Bog Turtle (Clemmys muhlenbergil). 48 A.18. Mole Salamander (Ambysfoma talpoideum) A.19. Longtail Salamander (Eurycea longicauda longicauda) 48 48 A.20. Four -toed Salamander (Hemidactylium scutatum). A.21. Green Salamander (Aneides aeneus). 49 A.22. He!lbender (Cryptobranchus alleganiensis) 49 A.23. Little Tennessee Rosyside Dace (Clinostomus funduloides ssp) 49 A.24. Sporn Chub (Cyprinella monacha). 50 A.25. Striped Shiner (Luxilus chrysocephalus). 50 A.26. Wounded Darter (Etheostoma vulneratum). 50 A.27. Olive Darter (Percina squamata). 50 A.28. Turquoise Darter (Etheostoma inscriptum) 51 A.29. Yellowfin Shiner (Notropis lutipinnis). 51 A.30. River Mussels (Seven Species). 51 A.31. Terrestrial Mollusks (Ten Species). 52 A.32. Rock Gnome Lichen (Gymnoderma linear). 52 A.33. Liverworts (Three Species). 53 A.34. Mosses (Three Species). 53 A.35. Filmy -ferns (Three Species) 53 A.36. West Indian Dwarf Polypody (Grammitis nimbata). 53 A.37. Piratebush (Buckleya disfichophylla). 54 A.38. Queen of the Prairie (Filipendulla rubra). 54 A.39. Fringed Gentian (Gentianopsis crinita) 54 A.40. Holy Grass (Hierochloe odorata). 54 A.41. Virginia Spirea (Spiraea virginiana) 54 A.42. Radford's Sedge (Carex radfordii) 55 A.43. Tall Larkspur (Delphinium exaltatum) 55 A.44. Swamp Pink (Helonlas bullata). 55 A.45. Goldenseal (Hydrastis canadensis) 55 A.46. Small Whorled Pogonia (lsotria medeoloides) 56 A.47. Fraser's Loosestrife (Lysimachia fraseri) 56 A.48. Divided -leaf Ragwort (Senecio millefolium). 56 A.49. Prairie Dropseed (Sporobolus heterolepis). 56 A.50. Mottled Trillium (Trillium discolor) 57 Appendix B. Agency Scoping Comments. Appendix C. Public Scoping Comments and Public Meeting Minutes and Affidavit of Publication. Appendix D. Speculative Effluent Limits for the Highlands VWVfP Expansion. Appendix E. EA Review Comments and Responses. IV ABBREVIATIONS USED IN THIS REPORT cfs cubic feet per second (flow) MGD million gallons per day (1.00 MGD = 1.55 cfs) gpm gallons per minute (1.00 MGD = 694 gpm) 7Q10 7-day duration, 10-year frequency low stream flow WTP water treatment plant VWVTP wastewater treatment plant BOD-5 5-day biochemical oxygen demand TSI trophic state index dbh tree diameter at breast height ROW right-of-way EPT Ephemeroptera, Plecoptera, Trichoptera insect orders (water quality indicators) USGS U.S. Geological Survey FWS U.S. Fish and Wildlife Service ACOE U.S. Army Corps of Engineers NRCS U.S. Natural Resource Conservation Service (= Soil Conservation Service) RECD U.S. Rural Economic & Community Development (= Farmers Home Admin.) DENR N.C. Department of Environment and Natural Resources DWQ N.C. Division of Water Quality DWR N.C. Division of Water Resources DAQ N.C. Division of Air Quality DLR N.C. Division of Land Resources DSWC N.C. Division of Soil & Water Conservation DCoR N.C. Division of Coastal Resources DMF N.C. Division of Marine Fisheries WRC N.C. Wildlife Resources Commission DPR N.C. Division of Parks and Recreation NHP N.C. Natural Heritage Program DEH N.C. Department of Environmental Health DOA N.C. Department of Agriculture PCP N.C. Plant Conservation Program MNS N.C. Museum of Natural Sciences SHPO N.C. State Historic Preservation Office DOT N.C. Department of Transportation DMV N.C. Division of Motor Vehicles CAMA Federal Coastal Area Management Act 404/401 Sections 404 and 401 of the Federal Clean Water Act NWP Section 404 Nationwide Permit (ACOE) GWQC Section 401 General Water Quality Certification (DWQ v 1.0. PROPOSED PROJECT DESCRIPTION. The Town of Highlands in southeastem Macon County (Figure 1) proposes to expand its existing municipal wastewater treatment plant (WWTP) from 0.5 million gallons per day (MGD) to 1.5 MGD to meet the anticipated peak month average flow in 2025. The effluent will continue to be discharged via the existing outfall (NPDES Permit No. NC0021407) to the Cullasaja River just below Lake Sequoyah dam. The expanded VVWTP will have biological nutrient removal and dual train treatment for the major treatment components (Figure 2). The facilities to be added include: 0.25 MGD sequencing batch reactor, 0.75 MGD sequencing batch reactor, two 0.078 MGD aerobic digesters, 0.162 MGD post -equalization tank, ultraviolet disinfection, aerated digester, maintenance and sludge condition building, sludge belt press, and emergency back-up generator. All new construction will be on the existing WVVTP property, which was cleared in 1994 (project area). Effluent nitrogen and phosphorus concentrations will be reduced, and residual chlorine eliminated. These proposed improvements will exceed the level of treatment needed to meet the speculative NPDES effluent limits provided by N.C. Division of Water Quality (DWQ) in a 14 August 2002 letter (Appendix D). Highlands also plans to install approximately 67,000 linear feet of new sanitary sewerlines that will connect several existing neighborhoods and partially developed subdivisions within and outside the Town to the expanded WWTP. These sewerlines will facilitate retirement of several package VWVfPs and hundreds of septic systems in the Lake Sequoyah watershed. 2.0. NEED FOR THE PROJECT. 2.1. Project History and Existing Facilities. Until 1994 Highlands operated a 0.25 MGD WVVTP that discharged to Mill Creek, a headwater tributary upstream of Mirror Lake and Lake Sequoyah. These two lakes (Class WS-III- CA-Tr) have extensive shoreline development built prior to the NC Water Supply Watershed Protection Act, and had high nutrient loading rates due to the combination of fertilizer runoff and wastewater effluent. Limnological studies by DWQ during the 1980s and early 1990s revealed eutrophic conditions and anoxic bottom waters in these lakes. Consequently, in 1994 the Town built a new 0.50 MGD WWTP discharging to the Cullasaja River just below Lake Sequoyah Dam (Class B-Tr), and retired the old Mill Creek VWVTP. The trophic state of Lake Sequoyah has subsequently improved from eutrophic to mesotrophic, and its use support status has improved from "support threatened" in 1994 to "supporting" in 1999. The existing 0.5 MGD Highlands WVVTP uses a sequencing batch reactor process. Existing treatment facilities include two 217,000 gallon reactor tanks, one 81,000 gallon post equalization tank, one 78,000 gallon aerobic digester, mechanically cleaned bar screen, chlorine gas contact basin, sulfur dioxide dechiorination, chemical feed building, vacuum sludge dewatering bed, and cascade aerator. The existing WWTP does not include biological nutrient removal. The existing wastewater collection system consists of a gravity interceptor and four lateral collectors serving the downtown area, Fourth Street, Upper Lake Road, Bear Pen Road, Pierson Drive, and Satulah Road. A pump station at the old Mill Creek WVVTP site and another on the Monger Creek arm of Lake Sequoyah at NC-106 near Highlands Country Club convey all wastewater to the WWTP. The sewer system presently serves only a small portion of the town. Many residences and businesses within and outside the town rely on private septic systems or 1 package treatment plants. Septic system failures are common in some areas, and several package VWVTPs in the area have been cited for repeated permit violations. The goal of this WVVTP expansion is to protect the Lake Sequoyah watershed by connecting as much existing development as possible to the Highlands sewer system, eliminating septic systems and package WVVTPs to the extent practicable. The proposed expansion is sized to accommodate full build -out of currently platted Tots in the proposed wastewater service area. It will not have excess capacity to accommodate new subdivisions. Need for retirement of septic systems and package WVVTPs in the watershed is further discussed in a 23 October 2002 letter from Richard Betz, Highlands Town Clerk, included in Appendix E. The Town is already working to reduce inflow and infiltration to the sewer system. During late 1999 the WVVTP began to experience sharply increased inflow. In April 2000 the average daily flow was 0.25 MGD and peak daily flows was 0.51 MGD, exceeding the plant's 0.50 MGD capacity. The system was repaired in May 2000, and in June 2000 average daily flows was 0.17 MGD and peak daily flow was 0.22 MGD. 2.2. Population Growth and Flow Projections. Several factors will increase wastewater flow to the Highlands WWTP: 1) extension of sewer service to Town residents that now use on -site treatment systems; 2) new development within Town limits; 3) annexation of peripheral unincorporated areas with existing subdivisions; and 4) new development in the areas to be annexed. The present Town limits comprise 4,000 acres, and the five peripheral areas under study for annexation total 1,100 acres. Most of the service area is in Macon County, but the eastemmost portion of Highlands includes 400 acres in Jackson County. Existing and projected population served and wastewater flows are described in the Preliminary Engineering Report (W.K.Dickson & Company, 2001) and summarized below. Highlands has seasonal population fluctuations associated with its tourism -dependent economy. Summer and fall are the peak tourism seasons. VWVTP flow data indicate that July is usually the peak flow month. The Town's 2001 estimated permanent resident population is 1,152 persons, and the estimated seasonal resident population (in summer homes) is 4,637. Hotel and motel rooms in Highlands add another 900 transients. Thus, the total population of permanent residents, seasonal summer home residents, and transients during peak season is 6,689 persons. In 2000 Highlands had 2,219 customers that receive public water but not public sewer. During the past two years some of these have been connected to sewer. Population and wastewater flow projections for the current Town limits are based on 1.79 percent annual growth of the permanent resident population, 3.93 percent annual growth of the seasonal resident population, and no change in the transient (hoteVmotel) population. Assuming that 50 percent of existing residences using on -site wastewater systems will connect to public sewer as the collection system expands, and all new development in Town will be built with sewer, the projected peak month service population in 2025 is 14,360 people, without further annexation. Projections for new development are based on undeveloped platted lots within existing subdivisions. No allocation for new development outside of existing subdivisions was included. Five areas are under study for annexation: 1) Hicks Road/Billy Cabin Road/Zachary Road area (360 acres north of Highlands) containing 144 residences and 79 vacant Tots; 2) Highlands Falls Country Club area (540 acres northeast of Highlands) containing 300 residential lots; 3) Ponderosa Subdivision/NC-106 South area (85 acres southwest of Highlands) containing 25 2 residences and 25 vacant Tots; 4) Mountain Laurel/Dog Mountain/NC-106 North area (107 acres southwest of Highlands) containing 46 residences and 38 vacant Tots; and 5) Flat Mountain area (42 acres northwest of Highlands) containing 22 residences and 2 vacant lots. Highlands is also negotiating to provide sewer service to Wildcat Cliffs Country Club and Cullasja Club, both outside of town. Some of these areas currently use individual septic systems and others rely on package VWVrPs discharging in the Lake Sequoyah watershed. Assuming 100 gallons of wastewater per capita per day (combined residential and non- residential flows), the projected peak month average flow for the present Highlands town limits in 2025 is 1.44 MGD. An additional 0.07 MGD is added for the Highlands -Cashiers Hospital, which includes the current 0.05 MGD plus 0.02 MDG for future expansion. The proposed annexation areas would yield another 0.12 MGD, which brings the total projected 2025 peak month average flow to 1.62 MGD. The proposed expansion to 1.5 MGD is based on the average of this population -based projection and an altemative projection of 1.36 MGD based on WWTP flow data. 3.0. ALTERNATIVES ANALYSIS. The altematives analysis presented here follows the alternatives discussed in the Preliminary Engineering Report (PER) submitted with the 201 Plan. 3.1. No Action Alternative. The no action alternative would prohibit the Town of Highlands from providing sewer service to new customers within its existing limits as well as those in potential annexation areas. The problem of failing septic systems in unsewered areas may worsen as these systems age, and existing package treatment plants incapable of advanced treated will continue to Toad excess nutrients and chlorine into small tributaries of Mirror Lake and Lake Sequoyah. Excess nutrients and bacteria leached into surface and ground waters can be hazardous to public health, fish nursery areas, and other environmentally sensitive areas. New development will have to rely on new on -site treatment systems or package VWVTPs. Some areas may be impractical to develop without centralized sewer, thus limiting the economic potential for landowners and the Town's tax base. No action is not considered a viable option and is eliminated from further consideration. 3.2. Spray Irrigation of Treatment Plant Effluent. A suitable area, publicly or privately owned, should be located within one mile of the treatment plant. Because of the low elevation of the treatment plant, a static head of 100 feet is assumed. Regulations do not require storage because spray irrigation would be used in combination with stream discharge. Tertiary filtration will be required for reuse of the effluent. We assume that the spray irrigation system would be sized to discharge one third of the projected 1.5 MGD capacity. Discharging 0.5 MGD through spray irrigation would require an additional 0.5 MGD beyond the currently permitted 0.5 MGD to be discharged into the Cullasaja River. Typical ranges of spray application rates for western North Carolina soils range from 0.5 to 1.75 inches per acre per week. An application rate of 1.5 inches per acre per week was assumed for this evaluation but yields a smaller spray field area requirement than lower application rates. A 3 spray irrigation system consists of the treatment plant, irrigation pump station and distribution piping and spray nozzles. Spray irrigation systems require a large area for the distribution of effluent. Based on the assumptions above, an area of approximately 110 acres would be required, including 100-foot buffers, to discharge 0.5 MGD through spray irrigation. Land acquisition would be the major cost. Because of the mountainous terrain, finding a suitable site this large would be difficult. A high percentage of soils in the area are of the Edneyville, Plott and Cullasaja series, and are not suitable for absorption fields. Spray irrigation onto golf courses has been successful elsewhere. The capital cost of developing a 0.5 MGD spray irrigation system is $2,992,300 in addition to the estimated $3,000,000 WWTP expansion costs. Because this option doubles capital expenditure compared with the 100 percent surface water discharge, it was not considered further. 3.3. Connect to Cashiers System. The Township of Cashiers is located 12.7 miles northeast of Highlands. Under this option, the Highlands VWVfP would be abandoned and the Highlands collection system would be connected to the Cashiers collection system. The Cashiers VWVfP and collection system is owned and operated by the Tuckaseigee Water and Sewer Authority (TOWASA), the regional authority in Jackson County. The Cashiers WWTP plant capacity is 0.1 MGD and currently operates at 90 percent capacity. It discharges to a tributary of the Chatooga River designated by DWQ as B-Trout and ORW (Outstanding Resource Waters). The WVVfP's NPDES permit allows the facility to expand to 0.2 MGD capacity with a concurrent reduction in effluent pollutant limits of 50 percent with expansion (no increase in total maximum daily load or TMDL of regulated pollutants). The classification of the receiving waters indicates that expanding the Cashiers WWTP beyond 0.2 MGD at this location is unrealistic, for it would require costly upgrades to increase flows without increasing TMDLs. For this reason, connecting to the Cashiers system was not considered further and a detailed cost analysis was not prepared. 3.4. Connect to Franklin System. The Town of Franklin is located along the Little Tennessee River 19 miles northwest of Highlands. Under this option, the Highlands WWTP would be abandoned and its collection system connected to the Franklin collection system. There are numerous routes and methods of tying the Highlands collection system to the Franklin VWVTP. The most obvious route, the Highway 64/Culasaja River corridor, is highly impractical and costly because of the 19-mile distance and mountainous terrain. The most economical method of connecting the systems would be a new pumping station near the Highlands WWTP and a new force main from Highlands to Franklin. The force main would follow existing roads to minimize the need for private easements. The nearest segment of the Franklin collection system is 14 miles from the Highlands VWVfP. 4 The Franklin WWTP has a capacity of 1.65 MGD and adequate treatment capacity to accept all of Highlands' present wastewater flow. However, Franklin has not shown interest in the regionalization of sewer facilities. Their current VWVrP may also need expansion in the near future. The North Carolina Department of Transportation (NCDOT) would require encroachment agreements for force main installation along NCDOT rights -of -way. This option assumes that force main encroachments could be obtained along NCDOT roads. This option is not practical because of the 14 to 19 mile distance required to connect the systems. The Franklin VVVVfP would require additional capacity to handle Highlands' flow in addition to Franklin's long term projected flow. Therefore, this option was not considered further and a detailed cost analysis is was not prepared. 3.5. On -Site Wastewater System for Treatment Plant Effluent. Similar to the Spray Irrigation option (3.2), this on -site system would discharge one third of the projected 1.5 MGD design capacity, requiring 208,333 linear feet of a chamber infiltrator. This would require a minimum of 67 acres for septic fields and an additional 67 acres for the repair area, assuming a site with uniform slopes could be found. Discharge of 100 percent of the plant effluent into this system would require at least 400 acres. This system is more expensive and requires more area than a spray irrigation system of equal capacity. Land costs in the Highlands area would be the greatest expense. Because a spray irrigation system would require less area, the on -site option was not considered further and a detailed cost analysis was no prepared. 3.6. Expand Highlands WWTP and Stream Discharge (Preferred Alt). The Town's WWTP was designed and constructed for a future expansion to 1.5 MGD and would accommodate the 20-year future average daily flow described in section 2.2. The current NPDES permit (NC0021407) stipulates typical secondary effluent limitations. It is assumed that effluent limitations for the expanded plant will require tertiary treatment which will provide a higher quality effluent and better protect the Cullasaja River. Tertiary filters and ultraviolet disinfection are included in the plan for the proposed WWTP. The existing facilities consist of two 0.25 MGD sequencing batch reactors (SBRs) with room to increase capacity to 1.5 MGD with the addition of another two SBRs of 0.25 and 0.75 MGD. The capacity of the post equalization tank will be tripled from 0.081 MGD to 0.243 MGD with the addition of a 0.162 MGD tank. Additionally, two 0.078 MGD aerobic digesters will triple the capacity of the existing digester. Sludge is currently disposed of at the Macon County Landfill. This practice would continue following expansion. New sludge dewatering facilities will be added and a sludge belt press constructed. These facilities are reliable, cost effective and easy to operate. The new facility will be protected to at least one foot above the 100-year flood level by extending tanks and related equipment above grade and by filling in the vicinity of the treatment plant. The buildings and the sludge belt press need to be accessible at grade and fill would be required in these areas. 5 The layout for the expanded treatment facility includes dual train (parallel path) for the major treatment units and the following future components: • 0.25 MGD Sequencing Batch Reactor • 0.75 MGD Sequencing Batch Reactor • Two 78,000 GPD Aerobic Digesters • One 162,000 GPD Post Equalization Tank • Ultraviolet Disinfection • Aerated Digester • Building for Sludge Conditioning and Maintenance • Sludge Belt Press • Stand-by Generator The total estimated capital costs for WWTP expansion with 100 percent surface water discharge is $3,002,470. This is the preferred alternative. 3.7. Additional Considerations. During the public informational meeting and in public comments received thereafter, several non-govemmental stakeholders requested consideration of moving the discharge to the head of Lake Sequoyah, to providing chemistry data in addition to biological data, and to endorsing a proposal to request VViId and Scenic River designation for the Cullasaja River (Appendix C). Comments from state regulators endorsed the proposed discharge location downstream of the lakes into the Cullasaja River. The environmental consultants concur and offer the view that this high gradient river provides more efficient mixing and assimilation of wastewater than a lake. Additionally, the lake has experienced anoxic conditions at the bottom in the past, and it is more vulnerable to the adverse effects of waste loading than the river. The benefits of lake discharge, according to stakeholders, include river protection and a public display of confidence in the treatment process. Public displays of confidence are not suitable considerations in the preparation of an environmental document that compares the costs and benefits of alternatives. Protection of the river has been addressed in the treatment process and will be required by state regulatory agencies through specific actions that will be a condition of approval of this EA. Providing chemistry data in addition to biological data would indeed offer more information, but the quality of the information would depend on the location, frequency, and selection of suitable monitoring parameters. North Carolina and other states require limited sampling for water chemistry at the intake and at the discharge for all NPDES holders. Expanding the sampling and analysis program would increase costs that would not be reimbursed because they would not be mandated conditions of the permit or of operation. An explanation of biological monitoring may help stakeholders understand why the state emphasizes, as do other states, biological monitoring. Chemical monitoring detects instantaneous conditions. If the water sample is taken before or after an adverse event, the event remains undetected. Biological monitoring, on the other hand, does not measure instantaneous conditions, but the resulting conditions following days, months, or even years of exposure to infrequent, short term, or chronic adverse events such as the release of toxic substances or excessive nutrients. 6 The release of significant toxic pollutants and excess nutrients affects a broad array of sensitive fishes (such as some darters) and macroinvetebrates (including the EPT groups typically used as indicators of good water quality). These infrequent, chronic, or excessive adverse events are detected by the disappearance or decline in numbers of sensitive species, frequently with an increase in the array of pollution tolerant species (such as certain chironomid insects known as midges and of certain tubificid oligochaete worms). It is for these reasons that regulatory agencies require and conduct biological monitoring in addition to chemistry analyses. Wild and Scenic River designation confers protections that include limits on new NPDES permits, and limits on riparian and instream uses. Consideration by the Town is recommended. However, designation is not related to the review process for approval of a wastewater treatment plant expansion. Collection and disposal of public sewerage is a public health issue. Regulatory agencies are concerned with efficiency, costs, benefits, and mitigation of unavoidable adverse impacts of this project on its own merits. 4.0. EXISTING ENVIRONMENT. 4.1. Topography and Soils. Topography in the Highlands service area is primarily steep -sloped mountains and broad valleys. Elevations range from 3,600 feet at Lake Sequoyah Dam to 4,300 feet in ridge top developments (USGS topographic quadrangle of Highlands N.C.). The downtown area is at 3,800 feet, and the VW TP site is at 3650 feet elevation. Conspicuous landforms in the service area include Bearpen Mountain, Little Bearpen Mountain, Little Yellow Mountain, Holt Knob, Wildcat Gap, Dog Mountain, and Satulah Mountain. Highlands is in the Blue Ridge Belt geologic formation, comprised of biotite gneiss, schist, amphibolite, and intrusive quartz diorite/granodiorite (N.C. Division of Land Resources, 1985). The predominant upland soils in the Highlands area are Edneyville-Chestnut complex (Ed and Ee), Chandler gravelly fine sandy loam (Cd), Cleveland -Chestnut -Rock ouctrop complex (Cp), and Plott fine sandy loam (Pw), which occur on ridges and slopes of eight to 95 percent (Thomas, 1996). The majority of developed land is on slopes less than 30 percent, and the steeper areas are mostly forested. Predominant soils along stream corridors are Tuckaseigee-Whiteside complex (TwC) on riparian slopes, and Sylva-Whiteside complex (SyA), Nikwasi loam (NkA), Rosman fine sandy loam (RsA), and Toxaway loam (ToA) on floodplains. Many floodplain areas are in agriculture or golf course use. There are currently no FEMA-designated floodplains in Highlands. 4.2. Land Use. The area proposed for VWVTP expansion is within the existing fence, and was cleared and graded when the original VVWTP was built in 1994. Soils on the site are mapped as Plott fine sandy loam and Edneyville-Chestnut complex (Thomas, 1996). The surrounding land outside the fence is mostly forested with hemlock and hardwoods. The Town of Highlands encompasses 3,600 acres in southeastern Macon County and 400 acres in southwestern Jackson County. Highlands straddles the watershed divide between the Cullasaja River (Little Tennessee River basin) to the north and west, and the Chattooga River (Savannah River basin) to the south and east. The predominant land uses are residential and resort development, with tourism as the principal commercial development. There is no heavy 7 industry. Another 1,100 acres containing resorts and residential development north and west of the Town limits are under study for annexation. In the annexation areas, hemlock forest dominates low-lying areas with mixed oak forest on well drained hillsides and ridges. The Cullasaja Club at the head of the Cullasaja River four miles northeast of Highlands is beyond the proposed service area. Much of the surrounding land is in the Nantahala National Forest and Nantahala Game Lands. 4.3. Prime and Unique Farmlands. Twelve prime farmland soils occur in Macon County, and three occur in the service area. Toxaway loam (ToA), Rosman fine sandy loam (RsA), and Tuckaseigee-Whiteside complex (TwB) are prime farmland soils when drained, protected from flooding, or not frequently flooded (Thomas, 1996). They occur in the service area along streams and in coves. No prime farmland soils occur on the WWTP site. Leon, Lynn Haven, and Murville soil series are designated unique farmland soils in North Carolina, but none occurs in Macon County. Developed land no longer qualifies as prime or unique farmland, regardless of soil type. 4.4. Public, Scenic, and Recreational Areas. Nantahala National Forest bounds Highlands to the west, north, and east and the Nantahala Game Land marks Highland's southem boundary. These public lands offer recreational opportunities that include hiking, rafting, scenic waterfalls, overlooks, hunting, and world -class trout fishing. The area features several private and one public golf course. Highlands Recreation Park provides swimming, tennis, exercise equipment, and summer programs for children. The Natural Heritage Program (NHP) lists Registered Heritage Areas and Dedicated Nature Preserves in Macon County. Those within 1.5 miles of the project and service areas are discussed in section 4.10.7. 4.5. Archaeological and Historic Resources. The State Historic Preservation Office (SHPO) indicated "no comment" in its 4 February 2002 response to the project scoping letter (Appendix B). SHPO offers this response for projects they believe are unlikely to affect significant archaeological or historical resources, either because the area has already been adequately surveyed, or because the setting and land use have low probability for yielding artifacts. 4.6. Air Quality. The N.C. Division of Air Quality (DAQ) and U.S. Environmental Protection Agency (EPA) have established ambient air quality standards for major air quality pollutants including particulates (TSP and PM-10), sulfur oxides (SOX), nitrogen oxides (NO,), volatile organic compounds (VOCs), carbon monoxide (CO), and ground -level ozone (03). North Carolina has not routinely monitored for ambient lead (Pb) since 1982 because of already low Pb levels and a decrease since the elimination of leaded gasoline. A 1999 arsenic study that included Pb sampling confirmed that the decrease has continued, with only 39 of 526 samples above minimum detection levels (DAQ, 8 2001). Air quality standards are based on hourly, daily, quarterly, or annual averages, depending on each pollutants physical properties, chemical dynamics, human physiological responses, and monitoring technology (N.C. Division of Air Quality, 1998). Primary air quality standards are those established for protection of public health. For some pollutants secondary standards are established to protect against adverse effects on soil, water, crops, vegetation, animals, materials, climate, visibility, and personal comfort. Ambient air quality data from two DAQ monitoring stations in Haywood and Swain counties during 1998 and 1999 are presented in Table 1 (N.C. Division of Air Quality, 2001). Macon County has no DAQ monitoring stations. Neither Macon nor adjacent counties have been designated EPA non -attainment areas, and automobile emission testing is not required in these counties. Haywood County, lying northeast of Macon County, will require emission testing by July 01, 2005. Macon County is not scheduled to require automobile emissions testing in the near future. 4.7. Noise Levels. Noise is subject to the federal Noise Control Act of 1972 (PL-92-574) and Quiet Communities Act of 1978 (PL-95-6009), which require standards of compliance and recommend approaches to abatement for stationary noise sources such as airports, highways, and industrial facilities. No facilities subject to federal noise regulation are located in the Highlands service area. 4.8. Water Resources. 4.8.1. Surface Water Hydrology. The majority of the Highlands wastewater service area is drained by the Cullasaja River and its headwater tributaries in DWQ sub -basin 04-04-01 of the Little Tennessee River basin. Major tributaries of the Cullasaja River in the Highlands area include Saltrock Branch, Ammons Branch, Mill Creek, Monger Creek, and Big Creek. Lake Sequoyah and Mirror Lake are large impoundments on the main stem of the Cullasaja River. Smaller impoundments on tributaries include Ravenel Lake, Harris Lake, Club Lake, Randall Lake, and even smaller ponds and lakes built for resort development. Highlands' raw water intake is located on Big Creek near the point where it widens into Lake Sequoyah. The drainage basin area of Big Creek at the intake is 5.3 square miles, mean annual flow is approximately 20 cfs, and the 7-day duration 10-year frequency (7Q10) low flow is approximately 2.0 cfs (Giese and Mason, 1991). During low flow conditions the intake may reverse the direction of flow in the Big Creek arm of the lake, drawing water from the main channel of Lake Sequoyah. The southernmost and easternmost portions of the Highlands service area are drained by headwater tributaries of the Chattooga River in DWQ sub -basin 03-13-01 of the Savannah River basin. Streams in these areas include East Fork Overflow Creek, Brooks Creek, Clear Creek, Edwards Creek, Little Creek, Big Creek, Cane Creek, and Norton Mill Creek. None of these streams is used for public water supply. All streams in the proposed Highlands service area that are mapped on the USGS 7.5 minute topographic quadrangle of Highlands are indicated as solid lines (perennial). No intermittent streams are mapped by USGS in the project service area. The Soil Survey of Macon County 9 (Thomas, 1996) shows all of the streams indicated by USGS plus many additional tributaries throughout the Highlands service area, both perennial and intermittent. 4.8.2. Surface Water Usage Classifications. The N.C. Division of Water Quality (DWQ) classifies surface waters based on their "existing or contemplated best usage." The primary classification system distinguishes three basic usage categories: waters used for municipal water supply (Classes WS-I through WS-V), waters used for frequent body contact (Class B), and waters used for neither of these purposes (Class C). Class C uses include maintenance of aquatic life, fishing, wildlife habitat, secondary recreation (limited body contact), wastewater assimilation, and agriculture. Water Supply Critical Areas (WS-II-CA through WS-IV-CA) assigned by DWQ extend 0.5 mile upstream of run -of -river water intakes or 0.5 mile upstream of the normal pool elevation for reservoir intakes. Supplemental DWQ classifications include NSW for nutrient -sensitive waters where nuisance algal blooms are likely, Tr for trout waters that require low temperatures and high dissolved oxygen, Sw for swamp waters that have naturally low pH and low dissolved oxygen, ORW for outstanding resource waters with special recreational or ecological significance, and HQW for high quality waters that have excellent water quality based on physical, chemical, and biological measurements. One or more supplemental classifications may apply to waters of any primary classification. Waters identified by the N.C. Wildlife Resources Commission (WRC) as critical habitat for protected species may be designated HQW. The Cullasaja River headwaters upstream of SR 1545 in Highlands, including Ravenel Lake and the upper half of Mirror Lake, is classified WS-III-Tr. From SR 1545 (crossing Mirror Lake) downstream to Lake Sequoyah Dam the river is classified WS-III-CA-Tr, to protect Lake Sequoyah for water supply use. The remainder of the Cullasaja River from Lake Sequoyah Dam downstream to its confluence with the Little Tennessee River near Franklin is classified B-Tr. The B classification is assigned to protect the river's recreational and baptism uses. The Highlands WWTP discharges to the Cullasaja River just below Lake Sequoyah dam. Stream classifications and protected watersheds in the Highlands service area are mapped in Figure 3. Cullasaja River tributaries and their lakes upstream of Lake Sequoyah, other than Big Creek, are classified WS-III or WS-III-Tr, and their lower reaches within 0.5 mile of Lake Sequoyah are WS-III-CA. Big Creek (including Randall Lake) is classified WS-II-Tr, with a 0.7 mile CA above Lake Sequoyah. Houston Branch, a northern tributary of Big Creek, is classified WS-I upstream of Highlands Reservoir (beyond the proposed wastewater service area). Class WS-I watersheds are in undeveloped land, and are not assigned a critical area. In the Savannah River basin, East Fork Overflow Creek, Little Creek, Edwards Creek, and Big Creek are classified C-Tr-ORW. Brooks Creek and Clear Creek are classified B-Tr. Norton Mill Creek and Cane Creek are classified C-Tr. There is no designated water supply watershed in the Savannah River portion of the Highlands service area. Protected water supply watersheds comprise 75 percent of the 5,100 acre expanded wastewater service area (Figure 4). This includes 132 acres of WS-2-CA watershed and 800 acres of WS-3-CA watershed surrounding Lake Sequoyah and the western half of Mirror Lake, and 2,875 acres of WS-3 watershed (balance of Lake Sequoyah watershed). Non -water supply watersheds comprise 25 percent of the future service area, including 872 acres of Class C watershed and 422 acres of Class B watershed, mostly in the Chattooga River basin. 10 4.8.3. Existing Surface Water Quality. 4.8.3.1. Cullasaja River Above Lake Sequoyah. From its headwaters on a golf course four miles northeast of Highlands to Lake Sequoyah dam, the Cullasaja River flows through residential, commercial, and forested land. Much of this area was in agricultural or commercial forestry prior to residential development, and the river is affected by erosion, sedimentation, and impoundment from past and current land uses. Roads and development encroach dose to the river, with little or no riparian buffer along many segments. However, some northern Cullasaja River tributaries that originate and remain in predominantly forested watersheds such as Big Creek support wild trout populations. Water quality ratings in streams based on benthic macroinvertebrate (benthos) and fish sampling indicate fair to poor conditions in the Cullasaja River upstream of Mirror Lake, based on four benthos samples by DWQ between 1990 and 1999 (NC Division of Water Quality, 2000) and fish community sampling by Dr. William McLamey. Mill Creek, which flows through downtown Highlands, was rated fair both above and below the old VWVfP in 1990 and 1991. A 1999 benthos sample below the old WWTP (five years after WWTP retirement) was also rated fair. Urban and golf course development in the Mill Creek watershed limit this stream's potential for biological recovery. Big Creek upstream of the Highlands raw water intake was rated excellent based on a first-time benthos sample in 1999. The 1997 use support ratings for these streams are as follows: Cullasaja River and Mirror Lake upstream of SR 1545, not supporting; Cullasaja River and Mirror Lake downstream of SR 1545, supporting; Mill Creek, partially supporting; Big Creek and Monger Creek, supporting (NC Division of Water Quality, 1997, 2000). The Draft 2002 Basinwide Plan (December 2001) use support ratings for these streams are unchanged from the 1997 ratings. Cullasaja River and Mill Creek are listed as high priority streams for recovery efforts based on lowering the total maximum daily loads (TMDLs) of pollutants under the Clean Water Act section 303(d) list of impaired waters. DWQ recently conducted a special biological monitoring study of the Cullasaja River and Mill Creek upstream of Mirror Lake, with funding from the N.C. Clean Water Management Trust Fund. The study evaluated benthos communities, channel morphology, riparian and instream habitat condition, water and sediment chemistry, land use, and pollutant sources in the watershed. The Draft Report (April 2002) identifies several problems that contribute to biological impairment in these streams, including: 1) insufficient large woody debris and other instream habitat structure; 2) inadequate forested riparian buffers; 3) channel erosion from urban stormwater runoff; 4) toxic pollutants in runoff from urban areas and golf courses; 5) impaired dispersal and recolonization of aquatic animals due to dams; 6) water quality effects of dams on stream temperature, dissolved oxygen, and nutrient cycling; 7) impaired sediment transport due to dams; 8) reduced stream flow in dry weather due to irrigation withdrawals and evaporation from lakes; and 9) lack of healthy stream refugia from which recolonization may occur. • The report recommends several general strategies to mitigate these problems, including 1) develop a strategy to reduce impacts of dams and promote recolonization of aquatic life from healthy streams; 2) restore forested riparian buffers where practicable; 3) enhance instream habitat by adding boulder clusters and Togs where appropriate; 4) review nutrient and pesticide management plans of local golf courses, and revise plans or operating procedures if necessary; 5) educate homeowners and landscape contractors regarding fertilizer, seeding, and pesticide use; 6) educate homeowners and builders regarding importance of forested riparian buffers and on -site infiltration of stormwater,, 7) develop local regulations to control development on steep slopes and 11 minimize erosion. Highlands has made significant progress on some of these recommendations, as discussed in the mitigation section of this EA and Appendix E. 4.8.3.2. Lake Sequoyah. DWQ evaluated the trophic status of Lake Sequoyah in 1988 (prior to the NC phosphate detergent ban) and found eutrophic conditions. The lake's use support status was listed as "support threatened" based on that study. Six years later Lake Sequoyah was classified as mesotrophic, with elevated chlorophyll -a and nutrient concentrations and anoxic hypolimnetic waters. (However, the predominant algae collected in 1994 were not species typically associated with nuisance blooms or taste and odor problems.) Based on these data, the lake was once again rated "support threatened" in the Basinwide Management Plan (NC Division of Water Quality, 1997). Concern over further water quality degradation in the lakes and need for additional wastewater treatment capacity prompted the Town to retire the 0.25 MGD WVVTP on Mill Creek upstream of Mirror Lake, and replace it in 1994 with the current 0.50 MGD WVVTP below Lake Sequoyah. This action eliminated a significant source of BOD and nutrient loading to the two lakes. A Iimnological study of Lake Sequoyah was commissioned by Highlands from May through October 1997, when water demand began to exceed the safe yield that Big Creek alone could provide. No nuisance algal bloom occurred during that study. The predominant algal species were not known to cause taste and odor problems. No water quality problem was apparent in 1997 that would impair the lake's use as a public raw water supply, despite extensive development close to the lake. A 1999 study of Lake Sequoyah revealed mesotrophic to moderately eutrophic conditions, with chlorophyll -a concentrations consistently above DWQ's 15Ng/1 standard for trout waters. Seven species of odor -causing algae were detected, but the Town's WTP superintendent reported no taste or odor complaints about the treated water. Lake Sequoyah is now rated "supporting" in the latest Basinwide Assessment Report and Draft Basinwide Management Plan (NC Division of Water Quality, 2000, 2001). The Draft Basinwide Management Plan commends Highlands for its adoption of an Erosion Control Ordinance and Subdivision Regulations in 1995. The Plan encourages the Town to fully implement and enforce these rules and its 1993 Watershed Protection Ordinance, and to develop better stormwater management plans. Stream and riparian restoration are also recommended in the Highlands area. 4.8.3.3. Cullasaja River Below Lake Sequoyah. The Cullasaja River near the Highlands WVVfP has a drainage basin area (dba) of 14.5 square miles. Mean annual flow typically ranges between 50 and 70 cfs, or 3.3 to 4.6 cfs per square mile, based on a USGS gage that operated 0.6 mile downstream of Lake Sequoyah Dam from 1931 to 1971 (Giese and Mason, 1991; USGS website). During most of this period the river was used for hydroelectric power generation with no minimum release flow requirement, and the 7Q10 low flow for this period is 2.4 cfs (Upper Cullasaja Watershed Association, 2001 Year -End Report). The hydroelectric plant was abandoned in 1967, and the USGS gage below Lake Sequoyah Dam was discontinued in 1971. In July 2001, USGS installed a new streamflow gage on the Cullasaja River at SR 1620, two miles downstream of Lake Sequoyah dam (dba = 18.8 square miles). The present 7Q10 low flow above the VWVI'P discharge is estimated at 7.2 cfs, based on the new gage and historic flow 12 data (Mark McIntyre, DWQ, personal communication). Average flow at the new gage during the lowest 7-day period to date was 8.0 cfs (August 9 to 15, 2002), and the lowest instantaneous flow recorded was 6.8 cfs, during an exceptional drought These flows include the wastewater effluent (0.3 to 0.5 cfs) plus runoff from 4.3 square miles of additional drainage area below the discharge. Adjusting for drainage basin area and subtracting the WWTP flow, the estimated 7-day average flow immediately above the effluent discharge during that week was 5.6 cfs. From the Highlands WVVTP below Lake Sequoyah to Cullasaja Gorge, the Cullasaja River flows six miles through Nantahala National Forest. Water quality improves progressively downstream through this segment as a result of turbulent aeration and inflow of high quality tributaries draining undeveloped land. The uppermost DWQ benthos site B-13, 0.7 mile below Lake Sequoyah, was rated good -fair in 1990, 1991, 1994, and 1996. Species richness declined slightly from 27 EPT taxa (aquatic insects used as indicators of good water quality) in 1994 to 20 EPT taxa in 1996 samples, after the new WWTP began operation, but not enough to lower the water quality rating. Site B-14 at Jackson Hole is five miles downstream, above the mouth of Brush Creek, and rated excellent (49 EPT taxa) in 1999. Below Cullasaja Gorge the river leaves U.S. Forest Service land and the surrounding land becomes rural residential, agricultural, and forestry. Despite human impacts, the biological condition of the Cullasaja River remains good to excellent for several more miles. Four benthos samples between 1991 and 1999 at Site B-15 (SR 1678) near Peeks Creek were rated excellent (42 to 50 EPT taxa), and fish community samples by Dr. McLamey near Peaceful Cove (below Walnut Creek) during the past decade were rated good. Continuing downstream, DWQ Site B-16 (SR 1524) rated good in 1991 and 1996 (35 and 37 EPT taxa), and Site B-17 (SR 1668) three miles upstream of Franklin rated excellent in 1999 (51 EPT taxa). Five tributaries along this river segment were sampled in 1999; four were rated excellent (Turtle Pond Creek, Brush Creek, Buck Creek, and Ellijay Creek) and one was rated good (Walnut Creek). Overall water quality in the middle section of the Cullasaja River (Sites B-14 to B-17) has remained high throughout the past decade of biological sampling. No data earlier than 1990 were reported. The Cullasaja River's drainage basin area increases to 92 square miles before joining the Little Tennessee River at Franklin, 16 river miles downstream of Lake Sequoyah. The lowermost two-mile segment is adversely affected by agriculture and development east of Franklin, and habitat quality in this segment is poor (Dr. William McLamey, personal communication). No DWQ data were reported for this segment Lake Emory, just below the confluence of Cullasaja River and Little Tennessee River in Franklin, was eutrophic in 1988 with high suspended solids, chlorophyll -a, and nutrient concentrations. By 1994 chlorophyll -a and nutrient concentrations had decreased substantially and the lake's trophic status was oligotrophic. The phosphate detergent ban, improvements at Franklin's WWTP, P, uptake of nutrients by wetlands at the head of the lake, and the closing of a large farm along the Little Tennessee River upstream of Franklin may have contributed to the observed water quality improvements. No subsequent data for Lake Emory were reported (NC Division of Water Quality, 1997, 2000). The Little Tennessee River at NC-28 near lotla downstream of Franklin was rated good -fair to good based on benthos and ambient chemical sampling by DWQ from 1983 to 1999 (NC Division of Water Quality, 1997, 2000). However, fish community sampling by TVA yielded good to excellent ratings in the Little Tennessee River at several sites between Lake Emory dam and southem Swain County (Dr. William McLamey, personal communication). Apparently healthy populations of several federal and state protected fishes and mussels occur in this river segment, species extirpated from most other streams in their historic range. Despite the discrepancy in 13 ratings between benthos samples by DWQ and fish and mussel community samples by TVA and others, this river segment is ecologically important. Maintaining high water quality in the Cullasaja River helps maintain habitat integrity and protected species below Lake Emory. 4.8.4. Groundwater Resources. Highlands is in the Blue Ridge Belt, in a region with mafic gneiss (GNM) and felsic gneiss (GNF) the predominant hydrogeologic units. Average well yields in these formations are 20 gallons per minute in the GNM unit and 17 gallons per minute in the GNF unit, standardized for a typical 154-foot deep, 6-inch diameter well (Daniel and Payne, 1990). Groundwater is generally of good quality and adequate for low -density residential use. Rainfall in the Highlands area is the highest in North Carolina, averaging 80 inches per year, providing ample groundwater recharge. 4.9. Fish and Aquatic Habitats. The Cullasaja River below Lake Sequoyah is approximately 40 feet wide with a substratum of predominantly cobbles and bedrock. In the immediate vicinity of the outfall, boulders and bedrock are present, but not riverweed (Podostemum ceratophyllum). The riverbanks and narrow flood plains are forested, except where US Highway 64 parallels the north bank. The river gradient is steep, dropping 350 feet over rapids and falls from Lake Sequoyah Dam to the base of Dry Falls 1.5 miles downstream. For several decades prior to 1967, aquatic habitat below Lake Sequoyah was stressed by dam retention for hydroelectric power generation that reduced flows. No minimum instream flow release was required then, and nearly all the river's flow was detained in Lake Sequoyah during low flow conditions. Consequently, few fish species remain between Lake Sequoyah Dam and Dry Falls (William McLamey, personal communication). Typical fishes in the Cullasaja River and tributaries between Dry Falls and Franklin include the mountain brook lamprey (Ichthyomyzon greeleyi), native brook trout (Salvelinus fontinalis), western rainbow trout (Oncorhynchus mykiss), exotic brown trout (Salmo trutta), stoneroller (Campostoma anomalum), river chub (Nocomis micropogon), whitetail shiner (Cyprinella galacturus), Tennessee shiner (Notropis leuciodus), mirror shiner (Notropis spectrunculus), warpaint shiner (Luxilus coccogenis), fatlips minnow (Phenacobius crassilabrum), blacknose dace (Rhinichthys atratulus), longnose dace (Rhinichthys cataractae), creek chub (Semotilus atromaculatus), northern hog sucker (Hypentelium nigricans), rock bass (Ambloplites rupestris), redbreast sunfish (Lepomis auritus), bluegill (Lepomis macrochirus), smallmouth bass (Micropterus dolomieu), greenside darter (Etheostoma blennioides), greenfin darter (Etheostoma chlorobranchium), gilt darter (Percina evides), and mottled sculpin (Coitus bairn;), based on Menhinick (1991) and field observations. Rare and protected fish species known from the Cullasaja River include the Tennessee River subspecies of the rosyside dace (Clinostomus funduloides.), wounded darter (Etheostoma vulneratum), and olive darter (Percina squamata), based on Menhinick and Braswell (1997). The helibender (Cryptobranchus alleganiensis), North America's largest salamander, may also occur in the lower Cullasaja River. These protected species are discussed further in section 4.13. Impoundments in the Highlands area, including Mirror Lake and Lake Sequoyah, support primarily stocked trout, smallmouth bass, largemouth bass (Micropterus salmoides), rock bass, and sunfishes (Fish, 1969). 14 Headwater tributaries in the Highlands area support few fish species, due to degradation from urban impacts. The unimpacted segments support trout, dace, shiners, and sculpin. Several Savannah River tributaries in southem and eastem Highlands are designated ORW, and most are wild trout streams. Small headwater streams are also important to downstream aquatic communities for their contribution to flow stabilization, thermal regulation, water quality protection, nutrient processing, and benthic macroinvertebrate production. Headwater stream segments too small, shallow, or steep for fishes provide habitat for semi - aquatic invertebrates and salamanders that require streams or seeps with limited competition and predation from fishes. Typical salamanders in seeps and headwater streams in the Highlands vicinity include dusky salamanders (Desmognathus spp.), spring salamanders (Gyrinophilus spp.), brook salamanders (Eurycea spp), and red salamanders (Pseodotriton spp.). 4.10. Wildlife and Terrestrial Habitats. The proposed VVWTP construction area is within the VWVfP fence, and was cleared and graded during construction of the original VWVfP in 1994. It is urban land with negligible vegetation or wildlife habitat value. Animals likely to occur on the VVWTP property are limited to those that tolerate urban and rural areas, including the five -lined skink (Eumeces fasciatus), Fowler's toad (Bufo woodhousel), gray treefrog (Hyla chrysoscelis), house sparrow (Passer domesticus), cardinal (Cardinalis cardinalis), robin (Turdus migratorius), white -throated sparrow (Zonotrichia albicollis), mockingbird (Mimus polyglottos), gray squirrel (Sciurus carolinensis), house mouse (Mus musculus), raccoon (Procyon lotor), opossum (Didelphis virginiana), and big brown bat (Eptesicus fuscus). Surrounding areas outside the VVWTP fence and elsewhere in the Highlands wastewater service area contain a variety of natural community types. These include high elevation red oak forest, chestnut oak forest, rich cove forest, Canada hemlock forest, and montane alluvial forest, following terminology of the N.C. Natural Heritage Program (NHP) community classification system (Schafale and Weakley, 1990). Much of the service area is disturbed land (agricultural or developed) that does not conform to the NHP classification. Significant natural areas are designated by the N.C. Natural Heritage Program (NHP) if they contain rare or protected species, high quality examples of relatively undisturbed natural communities, or unusual geological features. They may be on public or private land, and their designation as a natural area by NHP does not confer protection. A natural areas inventory of the Highlands area was conducted in 1991-1992, with funding from the Town. Six Registered Natural Heritage Areas occur within 1.5 miles of the Highlands VVWTP or service area: Cullasaja Gorge, Pinky Falls, Whiteside Mountain, Kelsey, Olive, and Satula Mountain Summit (NHP archives, 10 January 2001). The Henry M. Wright Preserve is a Dedicated Nature Preserve located within 1.5 miles of the service area. Table 4 lists these natural areas, acreages, and ownership. 4.11. Forestry Resources. No forests occur in the proposed VW TP construction area, which was cleared and graded in 1994. The proposed sewerlines will be installed within maintained road rights -of -way. Some of these roadside corridors are predominantly mowed lawn and some contain trees, mainly hemlock and oaks. Forest types beyond the WVVfP fence and in the wastewater service area are described 15 in section 4.10. Site indices for timber production on the major soil types in the Highlands area are listed in Table 2. 4.12. Jurisdictional Wetlands and Waters. RJG&A biologist Ward Marotti surveyed the VWVTP construction site for jurisdictional wetlands and waters on 30 January 2002 using the 1987 Army Corps of Engineers (ACOE) Wetlands Delineation Manual (Environmental Laboratory, 1987), and supplementary technical literature for hydrophytic vegetation, hydric soils, and wetland hydrology. No wetlands or streams were found on the WWTP site. No new construction at the existing Cullasaja River effluent outran is proposed. Wetlands along the proposed sewer lines were surveyed during January 2003. The approximate locations and acreages of impacts to jurisdictional wetlands and waters were estimated based on the field reconnaissance and preliminary sewer alignments provided by the engineers. More precise measurements of jurisdictional impacts will be determined in conjunction with 404/401 permitting when final alignments are selected. The proposed sewerline corridors needed to connect several existing neighborhoods to the expanded WWTP will cross streams or wetlands at 34 sites, based on NRCS soil mapping and field surveys by RJG&A biologists (Table 4). The largest proposed stream crossing is number 29 at the Cullasaja River (Figure 5.1) which has 3.4 square miles of drainage basin area. All other streams to be crossed have watersheds smaller than one square mile. Canada hemlock dominates the forests along these streams, with rosebay, leucothoe, and mountain laurel common as understory plants. Seeps and small wetlands are common in the expanded service area. Proposed sewerline corridors will cross jurisdictional wetlands at eight locations (Table 3, Figures 5.1 through 5.3). Hemlock forest dominates five of these and mowed vegetation dominates the remaining three sites. All proposed stream and wetland crossings are within existing road rights -of -way, and most contain few riparian trees. Some of the stream and wetland impacts identified in Tables 3 and 4 and Figures 5.1 through 5.3 may be avoided if the sewerlines can be installed in the existing road fill. Because final design has not been completed for the sewer lines, all potential wetland and stream impacts within ten feet of existing roads are considered herein. 4.13. Protected Species. Rare plant and animal species may be protected by the Federal Endangered Species Act, administered by the U.S. Fish and Wildlife Service (FWS), and by two North Carolina laws: the Plant Protection and Conservation Act, administered by the N.C. Department of Agriculture's Plant Conservation Program (PCP), and the Endangered Wildlife Protection Act, administered by the N.C. Wildlife Resources Commission (WRC). Protected species are those listed by FWS, WRC, or PCP as endangered (E) or threatened (T), or listed by WRC or PCP as special concem (SC). Rare species under consideration for future legal protection are designated as candidate (C), federal species of concem (FSC), or significantly rare (SR) and are not legally protected. This document addresses the potential for impacts on protected species only. Non -protected rare species were excluded unless known to occur close to the project area. 16 The Highlands area is geologically, topographically, and ecologically unique, even within the context of the regionally unique southem Appalachian Mountains. Consequently, this area has an unusually high concentration of rare species. The N.C. Natural Heritage Program (NHP) has records of over 200 rare plants and animals known from Macon and Jackson counties, of which 71 are federally or state protected as endangered, threatened, or special concem. These protected species are listed in Table 3 with their corresponding federal and state protection status and habitat req uirements. uirements. More detailed descriptions of each species, its habitat requirements, and likelihood of occurrence in the Highlands service area are provided in Appendix A. This information was compiled from Amoroso (1999), LeGrand and Hall (1999), Radford et al. (1968), Clark (1987), Adams et al. (1990), Palmer and Braswell (1995), Menhinick and Braswell (1997), NHP and WRC databases, and personal communication with agency biologists. The proposed VWVfP construction area was cleared and graded in 1994, and does not provide suitable habitat for any of the protected species known to occur in Macon or Jackson counties, based on a field survey by RJG&A biologists. None of these species is likely to occur on the WVVfP site, and no direct construction impact to protected species is likely. The proposed sewerline extensions into existing subdivisions (currently using either septic systems or package WVVTPs) will be installed along roadsides in predominantly developed areas. These corridors were surveyed for protected species habitats by RJG&A in February 2003. Although many rare species would not have been detectable during this season, these corridors did not appear to offer suitable habitat for any of the listed species, and the potential for adverse impacts to protected species is unlikely. The existing and future Highlands wastewater service area contains potentially suitable habitat for many protected species, as documented in Appendix A and Table 3. Fifteen species are unlikely to occur in either the service area or in the Cullasaja River or Chattooga River tributaries downstream of Highlands, and will not be affected by this project; these are indicated by the number "0" in the impacts column of Table 3. Six aquatic species do not occur in the service area but are known from or expected to occur in the Cullasaja River or Chattooga River tributaries downstream of Highlands, and may be affected by changes in the WVVTP effluent or stormwater impacts due to future development. These species are indicated by the number "1" in the impacts column of Table 5. Forty-seven species are not presently known to occur in the Highlands service area, but either occurred historically in the area or presently occur nearby. These species may persist as unknown populations in the service area, or may be temporarily extirpated but likely to recolonize suitable habitat in the service area, and are indicated by the number "2" in the impacts column of Table 3. Finally, three species have recent NHP element occurrence records within the service area, indicated by the number "3" in the impactscolumnof Table 3, and could be subject to impacts of future development supported by the expansion. 5.0. PREDICTED ENVIRONMENTAL IMPACTS. 5.1. Topography and Soil Impacts. VWVfP expansion will occur on approximately five acres entirely within the existing WVVTP fence line. Impacts to topography and soils in the WWTP area will be insignificant. The ten foot wide sewerline corridors will occupy 15.3 acres of existing road rights of way. Impacts to topography following sewerline construction will be negligible because original slope and contour 17 will be restored. For the same reason, impacts to flood elevation will be negligible, except around manholes where rims will be one foot above 100 year flood elevations. Contractors are required to follow an approved Erosion and Sedimentation Control Plan to minimize soil Toss during construction. The plan will be submitted to the DENR Regional Office for approval at least 30 days prior to construction, and the agency will be notified of the date that land - disturbing activity will begin. Ground cover sufficient to restrain erosion will be in place within 15 working days or 90 calendar days (whichever is shorter) following completion of construction. 5.2. Land Use Impacts. Because all proposed WWTP facilities will be constructed within the existing WWTP fence line, no direct land use impacts will result in the project area. New sewerlines will be needed to collect flows from the existing package WVVTPs and septic systems that will be retired in the expanded service area. These will be installed along developed roadsides where they will have negligible land use impact. Indirect and cumulative land use impacts may accrue as public sewer availability will facilitate development on lots where on -site wastewater systems would be difficult and expensive. However, overall development density is unlikely to be affected because the undeveloped Tots to be served are already platted, and cannot be further subdivided due to zoning. The expanded Highlands service area (existing town limits plus five proposed annexation areas) contains 5,100 acres, or eight square miles. The westem portion (932 acres) including Lake Sequoyah, Big Creek, and the westem half of Mirror Lake is within WS-II and WS-III Critical Areas, where new development density is restricted to 6 percent and 12 percent impervious surface, respectively (Figure 4). The central 2,875 acres of the Highlands service area is designated WS-III-BW (balance of watershed beyond the Critical Area), which allows up to 24 percent impervious surface for new development. Vegetated buffers 50 feet wide are required along perennial streams in WS critical areas, and 30 foot buffers are required in WS-III-BW areas. Much of the downtown area, developed prior to the water supply watershed protection rules, contains considerably higher development density and narrower stream buffers. The southem and eastem portions of Highlands in the Chattooga River basin (1,219 acres) and a 75 acre area north of Lake Sequoyah that drains below the lake are not water supply watersheds and do not have development density restrictions. However, these streams are designated trout waters, which require a 25 foot vegetated buffer from new development. Zoning and development regulations that mitigate impacts of new development are discussed further in section 6.2 and in responses to DENR review comments in Appendix E. 5.3. Prime and Unique Farmlands Impacts. Because no prime or unique farmland soils are found in the WVVTP project area, there will be no direct impacts to prime or unique farmlands. Prime farmland soils exist in the service area and indirect impacts to prime farmlands could result if development occurs in drainages or coves protected from flooding. The Town's Sedimentation and Erosion Control Ordinance provides some protection from development in such areas. The ordinance is discussed in section 6.2.2. 18 5.4. Public, Scenic, and Recreational Areas Impacts. No public, scenic, or recreational areas occur in the VWVTP construction area, and no direct impacts will occur. The expanded VWVfP will provide improved treatment and is unlikely to adversely affect recreational use of the Cullasaja River. Indirect impacts to public, scenic, or recreational areas resulting from residential or commercial development in the service area may occur but will be minimized by the local ordinances described in section 6.2. 5.5. Archaeological and Historic Resources Impacts. Because SHPO responded with "no comment" during project scoping (Appendix B), no cultural resources survey was conducted for this project and no direct impacts to archaeological or historic resources are anticipated. The SHPO may comment further when the EA is circulated for concurrence with a FONSI, should that be the conclusion of the lead agency. Indirect impacts to cultural resources may accrue from future development in the expanded service area. 5.6. Air Quality Impacts. An increase in airbome particulates from land disturbing activities and exhaust emissions from construction vehicles will occur during construction, but public health impacts should be negligible. Proper vehicle maintenance, frequent wetting of exposed soil, and prompt soil stabilization will minimize impacts. Because no forest clearing is required for construction, there will be no air quality impacts from buming woody debris. The WWTP may emit odors produced by bacterial metabolism, but odor control mechanisms will be incorporated into design and odors will be similar to those emitted by the existing facility. Airbome particulates may temporarily increase near the VWVfP when emergency generators are used during power outages. These brief episodes will not significantly affect air quality. Induced urban growth in the service area may cause an increase in air pollutant emissions from vehicles and construction. Particulate matter interferes with human and animal respiration and plant photosynthesis (N.C. Division of Air Quality, 2000). Carbon monoxide interferes with blood oxygen uptake. Sulfur oxides and nitrogen oxides are corrosive, damage crops, forests, and structural materials, and may aggravate respiratory and cardiovascular problems. Nitrogen oxides exposed to sunlight also cause ground -level ozone formation. DAQ considers ozone the most serious air pollutant in North Carolina, particularly during warm weather, with a wide range of adverse impacts on human health, wildlife, crops, forests, and materials. 5.7. Noise Level Impacts. Residents adjacent to the project area may experience nuisance noise levels during construction, which will be limited to daylight hours. Operational noise of the facility will be negligible and similar to current levels. Urban growth in the service area induced by this project may create nuisance noise levels due to traffic and construction in rural areas that are presently relatively quiet. Careful planning and 19 zoning decisions, preservation of forested buffers, and establishment of noise barriers for stationary sources such as highways and major commercial areas will protect residential areas from excessive noise. 5.8. Water Resources Impacts. Direct water quality impacts during project construction will be negligible. No streams occur in the proposed VWVfP construction area, and no modification at the effluent discharge on the Cullasaja River will be necessary. Soil erosion from the construction site will be minimized following proper erosion and sedimentation control practices. New sewerlines crossing streams along roadsides will be installed in accordance with ACOE and DWQ Nationwide Permit 12 conditions. The contractor will follow an approved Erosion and Sedimentation Control Plan meeting all requirements of both DENR and the Town of Highlands ordinances, the latter of which is more stringent than the state ordinance (section 6.2). Expansion of the Highlands VWVTP will triple the plant's permitted discharge capacity, from 0.5 MGD to 1.5 MGD peak month average flow. Based on DWQ's estimated 7Q10 low flow of 7.2 cfs, the instream waste concentration (IWC) will increase from a maximum of 9.7 percent at 0.5 MGD to 24.4 percent at 1.5 MGD. Speculative effluent limits for the expanded plant are provided by DWQ, including ammonia-N and residual chlorine limits (Appendix D). The project as currently proposed will also include biological nutrient removal and ultraviolet disinfection, exceeding the treatment requirements needed to comply with the NPDES speculative limits. Although effluent volume will increase, the concentrations of BOD, nitrogen, phosphorus, and residual chlorine are expected to decrease. If total mass loadings of these pollutants decrease, the net effect on downstream water quality is expected to be positive. The VWVfP improvements will allow future expansion of the Town's wastewater collection system to unsewered areas, and subsequent retirement of older septic systems and package VWVfPs that lack advanced treatment technology. Elimination of these facilities will reduce potential sources of surface and groundwater contamination and eutrophication of Mirror Lake and Lake Sequoyah. This VWVfP expansion project combined with future sewer extensions will accommodate new development on undeveloped Tots within existing platted subdivisions. These subdivisions have already received approval from either Highlands or Macon County, and would be developed with on -site treatment systems if sewer is not provided. The flow projections used to size the VV TP expansion (section 2.2) are based on build -out of existing playtted lots, and do not include any allocation for new development outside of existing subdivisions. Increased impervious surface from new development may reduce rainfall infiltration and cause higher peak stormflows likely to destabilize stream channels and aggravate erosion, sedimentation, and pollution. Reduced infiltration also reduces baseflow during dry weather and may cause small perennial streams to become intermittent. However, the area of new impervious surface expected in the Highlands area will be relatively small because the majority of roads in these subdivisions are already built, leaving only the new houses and driveways as contributiors to new impervious area. There is negligible land zoned for future commercial development in Highlands. Except for a few small downtown parcels, nearly all undeveloped land in town was "downzoned" to residential following Highland's 1989 Land Use Plan. Local programs and ordinances to manage development and stormwater to minimize adverse water quality impacts of development are discussed in section 6.2. 20 5.9. Fish and Aquatic Habitat Impacts. Impacts to fish and aquatic habitats include the water quality impacts discussed in section 5.8. No fish habitat occurs in the proposed VWVfP construction area and no direct impacts of construction are expected. New sewerlines crossing streams will be installed along roadsides, which will minimize impacts to stream banks and riparian habitat. Aquatic habitat quality is expected to improve downstream of the VWVfP due to the proposed treatment process improvements, which include nutrient removal and UV disinfection. Retirement of malfunctioning septic systems and package WVVTPs in the service area may improve water quality and fish habitat in many of Highlands' small streams. Indirect and cumulative impacts to fish habitat in the wastewater service area may result future land clearing and development, as discussed in the preceding section. Future development will be mostly residential and limited to platted lots in existing subdivisions, as discussed in section 2.2 and the attached letter from Highlands Town Administrator Richard Betz in Appendix E. Highlands has erosion control requirements more stringent than the state (section 6.2) and Lake Sequoyah will serve to trap the majority of sediment that escapes erosion control measures. The lake will also help to mitigate peak storm flows and retain or assimilate urban runoff pollutants. Therefore, future growth supported by this project is unlikely to affect aquatic habitat in the Cullasaja River downstream of the lake. Impacts of future development on aquatic habitat may also accrue in the Chatooga River tributaries of southem and eastern Highlands, including several Tr and ORW streams. Although these streams are not protected by the Water Supply Watershed Ordinance, the Town and Macon County require natural vegetated buffers in accordance with these streams' Tr and ORW designations. Because the expected development will be limited to residential construction in existing platted subdivisions where the majority of roads are already in place, the potential for adverse impacts is expected to be minor. Local programs and strategies to protect water quality will also protect fish and aquatic habitat (section 6.2). 5.10. Wildlife and Terrestrial Habitat Impacts. Because all project construction will take place within the existing VWVfP fence on previously disturbed and currently maintained land, no direct impacts to wildlife and terrestrial habitats are anticipated. Indirect and cumulative impacts to wildlife and terrestrial habitats due to urban growth in the expanded service area are likely. However, because the expected growth will be predominantly residential construction in existing platted subdivisions, where few if any new roads are needed, the potential for adverse impacts is expected to be minor. Many of the water quality protection measures discussed in section 6.2 will also protect terrestrial habitats and wildlife. Much of the land surrounding Highlands is National Forest and cannot be developed. 5.11. Forestry Resource Impacts. Because all project construction will take place within the existing VWVfP fence and along existing roads on mostly disturbed and currently maintained land, direct impacts to forestry resources will be negligible. Induced residential growth in the service area and annexation areas may remove additional forest, but these impacts will be mostly confined to infill development of vacant lots in existing subdivisions, as discussed in sections 5.2 and 5.10. 21 5.12. Jurisdictional Wetland Impacts. No ACOE jurisdictional are present on the WWfP site. Along sewerline construction corridors, approximately 0.071 acre of wetlands will be impacted (Table 3). This small wetland impact should be permitted under Nationwide Permit 12 (Utility Line Discharges) without mitigation. As discussed in section 4.12, wetland impact was estimated based on preliminary construction corridors, and a more precise impact determination will be calculated prior to 404/401 permitting. Wetlands are most likely to occur in the service area on soils mapped as Toxaway (ToA), Nikwasi (NkA), Sylva-Whiteside (SyA), or Rosman (RsA), which occur in generally narrow corridors along streams (Thomas, 1996). Future development may cause minor loss and degradation of wetlands in the service area. However, as the majority of new growth will be residential development in existing subdivisions, and all subdivisions in the expanded service area must comply with Highlands and/or Macon County water quality protection measures (section 6.2), the potential for direct wetland impacts is small. Isolated wetlands not subject to ACOE protection will be most vulnerable to degradation and loss. Development of non -wetlands upslope may also adversely affect adjacent wetlands. The majority of jurisdictional wetlands in the service area are in floodplains unsuitable for buildings, although roads, golf courses, and other ground -level facilities may be sited there with proper authorization. Future sewerlines needed to serve the expanded area will be installed along roadsides wherever possible, minimizing stream and wetland impacts. In September 2002 Highlands adopted a zoning amendment requiring that any person applying for a Zoning Certificate that may affect wetlands must indicate on the submitted site plan any wetlands on the property, and must obtain Section 404 authorization from the Army Corps of Engineers before a Zoning Certificate will be issued. Section 404 permit applications (or pre - construction notifications) are also reviewed by DWQ for Section 401 compliance. This local regulation ensures that developers do not overlook federal Clean Water Act 404/401 requirements. 5.13. Protected Species Impacts. No protected species is likely to occur in the proposed WVVfP construction area, which is previously cleared land, nor in the Cullasaja River Between Sequoyah Lake Dam (effluent discharge) and Dry Falls. No direct impact to these species from WVVTP construction is likely. Habitats along the roadside sewerline construction corridors were assessed by RJG&A in February 2003. Based on this survey, none of the listed species is likely to occur in these corridors and no direct impact from construction is likely. Four aquatic protected species (Little Tennessee rosyside dace, wounded darter, olive darter, and hellbender) occur in the lower Cullasaja River between Cullasaja Gorge and the Town of Franklin (Table 3, Appendix A). Several others apparently do not occur in the Cullasaja River but may have occurred there historically, and might be re -introduced via translocation from extant Little Tennessee River populations downstream of Lake Emory. The proposed wastewater treatment improvements will yield a higher quality effluent that should benefit these species. Conversely, future development in the service area may adversely affect downstream water quality, but these impacts should be minimal due to the hydrologic effects of Lake Sequoyah and Mirror Lake, combined with WS watershed protection rules and other measures (section 6.2). 22 Two aquatic protected species (yellowfin shiner and turquoise darter) occur in the Chattooga River and its tributaries downstream of the Highlands service area. Development in the Chattooga (Savannah River) watershed, a minor portion of the Highlands service area, is expected to be low density residential. Streams in this watershed will be protected in accordance with their "trout waters" designation, and impacts to these two rare fish species should be minor. Three terrestrial species (southern rock vole, green salamander, and Highlands moss) have been reported within the proposed Highlands service area during recent years, and are presumed extant. Many other species are not presently known within the service area, but might occur there based on historic records, recent records nearby, or the presence of apparently suitable habitat types (Table 3). Any of these species may be affected, directly or indirectly, by future development supported by the VWVfP expansion. Many of these species occur in wetlands, humid gorges, waterfall spray zones, and steep rocky areas unlikely to be developed. However, rare species populations in these sites may be adversely affected by development of adjacent lands, due to habitat fragmentation, road mortality, stormwater impacts, invasive exotic species, domestic animals, and micro -climatic changes, especially loss of shade and humidity. Because the majority of new development is expected to occur as infill within existing developments, the potential for impacts to these species is minor. The Highlands Land Trust, a private non-profit organization (828-526-9938), is available to assist the town and landowners in developing protection strategies for ecologically sensitive lands, including rare species sites. In 1991-92 the Town contracted Dr. L.L. Gaddy to conduct a natural areas inventory of the Highlands Plateau. Town planners use this document in planning growth and reviewing development plans. 5.14. Introduction of Toxic Substances. Potential sources of toxic substances during construction may include exhaust emissions, oil, fuel, and other vehicle fluids. Escape of these substances will be minimized by proper vehicle maintenance and collection and disposal of fluid containers. Contractors will be instructed to take precautions to ensure that no uncured concrete is allowed to contact surface waters. Following construction, the project is not expected to release hazardous or toxic quantities of substances. The risk of toxic substance spills will be greatly reduced following the elimination of chlorine contact disinfection. Toxic substance loading to streams via stormwater runoff may increase as the service area becomes more urbanized. Vehicle fluids, heavy metals, fertilizers, pesticides, detergents, paint, solvents, pavement, and construction materials may contribute to stormwater toxicity. Strategies that promote stormwater dispersal and soil infiltration rather than channeling it to streams will help reduce stormwater pollution resulting from new development. These are discussed further in section 6.2. 6.0. MITIGATIVE MEASURES 6.1. Mitigation for Direct Impacts. Direct impacts of project construction and operation have been minimized through careful project design. The expanded VWVI'P facilities will be built on previously cleared land containing no woodland, wetlands, or streams, and construction will comply with Highlands' stringent Erosion and 23 Sedimentation Control Ordinance. The proposed treatment process upgrade has been designed to provide a more advanced level of treatment than the speculative effluent limits require, including biological nutrient removal and UV disinfection (section 5.8). Effluent quality will be better than that from the existing VWVfP, and several existing package VWVTPs and hundreds of private septic systems will ultimately be retired as a result of this project. Overall nutrient and chlorine loading to the upper Cullasaja River basin will decrease. The potential direct environmental impacts of the project are predominantly positive, and no further compensatory mitigation for direct impacts is likely to be required as a condition of permit issuance or EA/FONSI approval. 6.2. Mitigation for Indirect and Cumulative Impacts. The VVWTP expansion is primirily intended to facilitate retirement of several package WWTPs and numerous septic systems in the Lake Sequoyah watershed, but it will also accommodate new development in the expanded wastewater service area. The wastewater flow projections used for sizing the expansion are based on connecting the majority of existing development within and outside town limits, plus infill of undeveloped platted lots in existing residential subdivisions. New non-residential development is expected to be minor, as nearly all undeveloped land in Highlands was down -zoned to low density residential use a decade ago. Only a few small lots, all less than one acre, in the downtown area with existing sewer service remain available for new commercial development. The expansion does not include an allocation for new major development beyond existing subdivisions. A combination of federal, state, town, and county regulations and programs are implemented in the proposed Highlands wastewater service area to mitigate the adverse effects of urban growth. These include planning and zoning principles to control development density and impervious surface area, encourage low -impact cluster development, and to preserve open space and natural riparian vegetation. Town of Highlands ordinances and programs that protect natural resource and reduce impacts of new development are summarized below. 6.2.1. Zoning and Watershed Ordinance. The Highlands Zoning Ordinance regulates how and where specific types of development may occur within the Town and its Extra -Territorial Jurisdiction (ETJ). The Zoning Ordinance includes eight development categories (three residential, four business, and one governmental/institutional) and three watershed overlay districts: 1) Big Creek Watershed Critical Area (WS-II-CA), which comprises 132 acres (3 percent of service area) in northwestern Highlands, 2) Lake Sequoyah/Mirror Lake Watershed Critical Area (WS-III-CA), which comprises 800 acres (16 percent of service area) in western Highlands, and 3) Lake Sequoyah/Mirror Lake Balance of Watershed (WS-III-BVV), which comprises most of the remaining service area (2,875 acres, or 56 percent). The ordinance defines specific guidelines and requirements for all development activities proposed in each district of each category. Only 1,294 acres (25 percent) of the proposed service area is outside of water supply watersheds, and designated Class B or Class C (Figure 4). Within the WS-II-CA overlay district, single-family residences may be constructed at a density no greater than one unit per two acres. Cluster and multi -family developments allow more dwelling units per acre, but the overall project density must not exceed this limit. For example, on a 20 acre tract, 10 units can be constructed on two acres, but the remaining 18 acres must be permanently dedicated as vegetated open space. The built -upon area (bua) of 24 any development, residential or non-residential, in the WS-II-CA watershed must not exceed six percent of the total parcel area, and the remainder of the parcel must remain in its natural or vegetated state. New development must preserve a minimum 50-foot vegetated buffer on all sides of any perennial water as identified on the most recent version of the USGS 7.5 minute topographic map. The WS-III-CA overlay district allows single-family residential development at a density of not more than one unit per acre of land, or a maximum of 12 percent bua for other residential and non-residential development. The remainder of the parcel must remain in its natural or vegetated state, and the stream buffer requirement is the same as in the WS-II-CA watershed. The WS-III BW overlay district allows two dwellings per acre, or 24 percent bua. Non- residential development must include sufficient parking for its intended uses, which is included in the bua calculation. Section 2.116, paragraph C of the Zoning ordinance provides guidance for calculating the minimum number of parking spaces that must be provided, depending on the parcel's intended use. The remainder of the property must remain in its natural or undisturbed state. New development must preserve a 30-foot wide vegetated buffer along any perennial water indicated on the USGS topographic quadrangle. If built -upon area exceeds 24%, then a 100-foot undisturbed buffer along perennial streams must be maintained. Non-residential buildings which will store, utilize, or generate toxic or hazardous substances in any WS watershed must provide adequate spill containment structures. The Zoning Ordinance supports the federal Clean Water Act by requiring that any person applying for a Zoning Certificate that may affect wetlands must indicate on the submitted site plan any wetlands on the property, and must obtain Section 404 authorization from the Army Corps of Engineers before a Zoning Certificate will be issued. Section 404 permit applications (or pre - construction notifications) are also reviewed by DWQ for Section 401 compliance. This local regulation ensures that developers do not overlook the 404/401 requirements. Under the Zoning Ordinance, the Board of Adjustment reserves the right to recommend alternative development criteria, or impose development conditions or restrictions as it deems necessary for the siting of cell towers. Decisions will be made on a case -by -case basis, and will be governed by adjacent property compatibility or potential adverse impacts of proposed towers. In the event of a federal nexus such as a Section 404 (wetlands) permit application, cell tower siting may also be reviewed by the State Division of Archives and History, which may request a viewscape (balloon) survey for proposed tall structures in the vicinity of properties listed on the National Register of Historic Places. 6.2.2. Subdivision Ordinance. The Highlands Subdivision Ordinance addresses subdivision development within the Town and its ETJ. Preliminary plats must be approved by the Planning Board and Commissioners before any street, utility, or public service shall be extended or connected to said development. Preliminary plats must include property boundary lines, location of any significant natural features, five-foot contour intervals, adjacent properties, proposed streets, utilities, and stormwater layouts. Plans for proposed streets outside the Town's planning area must be accompanied by a letter of approval from the District Engineer of NCDOT. Sanitary sewer and water distribution systems must be approved by the appropriate state agencies or Macon or Jackson County health departments. These systems must also be reviewed by the Town 25 Engineer or an approved representative thereof, and a report submitted to the Town prior to its review. Parcels subject to adverse environmental or topographic constraints that pose a threat to health, safety, or property must have said adverse conditions corrected prior to approval by the Town. Water and sewer systems that shall connect to the public system must be designed and sealed by a PE. Where public water systems are utilized, hydrants must be served by a minimum pipe diameter of six inches. Where a private sewer and water system is to be utilized, the Macon or Jackson County Health Department shall conduct field investigations of the proposed system and provide the developer with a letter of approval for the system. All rules and design specifications set forth in the Town's Zoning Ordinance shall be enforced during the subdivision review process. However, the minimum lot size requirement may be waived in the case of cluster developments. Cluster developments are exempt from minimum lot size requirements, but will not exceed the maximum number of lots allowed in a particular zoning district and must utilize extraordinary water control measures such as bioreactive ponds or subsurface drainage reservoirs. The reduction in lot size achieved by a cluster development must be compensated for by dedication of an equal amount of open space. The open space may be granted to the Town or retained privately. Open space must be maintained and preserved in perpetuity. The open space dedicated or preserved must, to the extent practicable, incorporate existing significant natural features. New stormwater conveyances Tying parallel to new or existing roads must be designed to effectively convey the calculated 10-year storm flows. Cross drainages, which cross perpendicular to new or existing roads, must be designed to effectively convey the calculated 25- year storm flows. In the event that a natural stream channel must be relocated, the resulting channel must be capable of effectively carrying the calculated 100-year storm flow. Any land proposed for subdivision which lies, in whole or part, in the watershed of any water designated as a water supply, shall conform to the standards set forth in the NC Water Supply Watershed Protection Act (G.S. 214.5, or House Bill 156). 6.2.3. Soil Erosion and Sedimentation Control Ordinance Highlands adopted a Soil Erosion and Sedimentation Control Ordinance, Chapter 11 of the Town Code, on 07 October 1992. The ordinance regulates land -disturbing activities within the Town and its ETJ (essentially the entire proposed wastewater service area) with respect to erosion and sedimentation control. The Town's Zoning Administrator is responsible for erosion and sedimentation control plan review, permit issuance, and enforcement. The Ordinance mandates that all land disturbing activities that impact more than 3,000 ft2. must first obtain a sedimentation and erosion control permit. Erosion and sedimentation control plans must identify environmentally sensitive areas subject to greater erosion and sedimentation control risks and limit the time and area of exposure. Erosion and sedimentation control plans must incorporate mechanisms for minimizing adverse impacts to downstream areas by controlling surface flows and sedimentation. The Soil Erosion and Sedimentation Control Ordinance mandates buffer zones along lakes and watercourses. The Town enforces the N.C. Environmental Management Commission's (EMC's) 25-foot buffers adjacent to waters designated as Trout waters and further requires that 26 all buffers with Tr be wide enough to confine visible siltation to within the landward (edge closest to land disturbance) 25 percent of the buffer width. Erosion and sedimentation control devices, either manmade or natural, must be sufficient to protect surface waters from siltation and runoff from the calculated 10-year storm. Exposed slopes shall be gradual enough to restrain accelerated erosion and must be revegetated within 30 working days of project completion. Land disturbing activities within HQW zones must not disturb more than 20 acres at any one time. Erosion and sedimentation control devices installed for disturbances in HQW zones must be designed to accommodate for the calculated 25-year storm, and sediment basins must have a settling efficiency of at least 70 percent of the 40 micron soil particles. Areas of land disturbance in HQW zones must be provided with ground cover sufficient to restrain erosion within 15 working or 60 calendar days, whichever is shorter. Section 1116 of the Ordinance addresses required permits for land disturbances of any size. Activities such as driveway construction, septic tank installation, fire fighting activities, etc. are exempted from this requirement. In most cases, the applicability of this requirement will be decided by the Zoning Administrator. In October 2001 the Soil Erosion Control ordinance was amended to strengthen protection on steep slopes: The application for a Land Disturbing Permit shall identify the total area to be disturbed and the greatest slope within the disturbed area. The Zoning Administrator may conduct an inspection to verify the slope with an appropriate mreasuring device. The new requirements are: (1) 0 to 30% Slope: A site plan shall be submitted, drawn to a scale of at least one inch in forty feet, and indicating the nature and location of all land disturbing activities proposed for the site that may cause or contribute to soil erosion and sedimentation, together with those measures and devices intended to control soil erosion and sedimentation. (2) 30 to 60% Slope: In addition to the information required for slopes of 0-30%, topographic contour lines shall be indicated on the site plan at a minimum of five foot intervals, and a detailed planting schedule for each phase of construction shall be submitted. (3) Over 60% Slope: A full erosion and sedimentation control plan shall be submitted, pursuant to Section 1117 of this Ordinance, regardless of the area to be disturbed." 6.2.4. Ordinance Regulating the Draining of Impoundments. On 07 March 2002, the Town of Highlands adopted an ordinance regulating the draining of impoundments within the town's corporate limits (Section 2). Pursuant to the rules, individuals wishing to drain an impoundment must first apply for, and receive, an Impoundment Draining Permit. Impoundments one-half acre or smaller in size and having a drainage basin less than 75 acres must submit a plan indicating the proposed method of dewatering and indicate measures to prevent sediment from being released to receiving waters. The plan must include a time schedule of proposed activities. If the drainage is to be permanent, measures to stabilize areas subject to erosion and sedimentation must be incorporated. Methods to achieve turbidity below 50 NTUs in all receiving waters must be included. 27 Impoundments greater than one-half acre in size or having a drainage basin larger than 75 acres must have a plan prepared by a NC Professional Engineer and submitted for impoundment draining permit approval. The plan must include a time schedule of proposed activities, erosion control structures, diversion measures, and other protection mechanisms to reduce the receiving water's susceptibility to sedimentation and erosion up to the ten-year storm event. If the drainage is to be permanent, measures to stabilize areas subject to erosion and sedimentation must be incorporated. Methods to achieve turbidity below 50 NTUs in all receiving waters must be included. The watershed administrator may solicit comments on the permit proposal from the Town Engineer, other qualified professionals, or the NC DENR, and request post -construction turbidity monitoring from the same. In addition to the impoundment draining permit, applicants are required to comply with all state and federal regulations. The penalty for violating this ordinance is $50,000. 6.2.5. Lake Ordinance and Reservoir Recreation Plan. Lake Sequoyah was reclassified to a Class 1 Public Water Supply Reservoir in 2000, culminating the Town's seven year effort to remove all point source discharges in the watershed. The last remaining package VWVfP (S.B. Associates Plant) is scheduled to be retired and connected to the Town's sewage collection system by 30 November 2002. A Lake Ordinance and Reservoir Recreation Plan were adopted in October 1999 as part of the reclassification process. The Lake Ordinance requires a 50 foot vegetated buffer around the lake shoreline, nearly all of which is private land. The buffer area should maintain diffuse flow so that runoff does not become channelized. Existing private boat docks may be repaired, but no new or expanded structures are allowed. Materials used for repair may include untreated wood, plastic, or concrete. Creosote or pressure -treated wood are prohibited. Fishing and boating are allowed on most of the lake, but boats are limited to a maximum speed of five miles per hour, and electric motors are recommended. No boating is allowed within a 50 yard radius of the water supply intake on the Big Creek arm of Lake Sequoyah. The ordinance prohibits spitting, urinating, defecating, or placing any liquids, solids, or trash (except as authorized by the ordinance) in the lake or its environs (which includes the 50 foot buffer and other areas from which runoff may enter the lake). No domestic animals are allowed in the lake or within 50 feet of the shoreline. No open fires are allowed along the lake shoreline or at the lake's public access facilities. No firearms, alcoholic beverages, or hunting is allowed in the environs of the lake. The operator of any boat on the lake is responsible for preventing passengers from violating this ordinance, and failure to do so, whether intentional or by neglect, shall constitute a violation. Any person convivcted of violating any provision of this ordinance shall be fined $500 and/or imprisoned for 30 days. 6.2.6. Other Water Quality Protection Measures. In addition to the Water Supply Watershed Ordinance, Soil Erosion and Sedimentation Control Ordinance, Zoning and Subdivision Ordinances discussed above, the Town of Highlands uses some non -regulatory measures and incentives to provide additional protection of stream channel integrity and water quality. The town works closely with the Upper Cullasaja Watershed 28 Association to monitor on -site development activities such as proper use of silt fencing and the qualifications of heavy equipment operators under the Clean Water Contractor Program. Coordination with Macon County: In response to water quality degradation originating outside Town limits, the Town officially requested that Macon County enforce a local Soil Erosion and Sedimentation Ordinance (similar to its own Ordinance adopted in 1984) and an Ordinance Regulating the Draining of Impoundments (similar to the groundbreaking Ordinance developed by the Town and adopted March 7, 2002) in the Lake Sequoyah Watershed outside the corporate limits. Both Ordinances have been adopted and are being enforced (in addition to the County Watershed Protection Ordinance adopted in 1994). The Soil Erosion Ordinance was adopted in November of 2001. The Impoundment Ordinance was adopted July 1, 2002, and the interlocal agreement providing for enforcement by the Town Watershed Administrator was approved July 3. Natural Areas Inventory: The need for a Natural Areas Inventory was identified as a key component of the Town's 1989 Land Use Plan. The inventory was conducted by Dr. L. L. Gaddy with support from the N. C. Natural Heritage Foundation, and was completed in May 1992. This document identifies areas on the Highlands Plateau with significant biological or geological features that should be protected. It is used by the Highlands Land Trust, a private nonprofit corporation dedicated to the acquisition and protection of significant lands, and by Highlands and Macon County in planning for growth and review of development plans. To date none of the significant natural areas identified in the survey in Highlands has been developed. Greenways: The Highlands greenway was developed in 1991 as a walking and educational trail, stretching from the Mirror Lake wetlands on the Mill Creek arm of the lake southeastward through the downtown area to the summit of Sunset Rock in southeastern Highlands. The trail segment which parallels Mill Creek through the Town's 30 acre Recreation Park is left primarily in its natural state. 7.0. STATE AND FEDERAL PERMITS REQUIRED • SEPA Environmental Assessment (EA) review and concurrence with a Finding of No Significant Impact (FONSI) is required. • An Air Emissions Permit from DAQ may be required for emergency back-up generators at the VVWTP, depending on fuel type and power rating. • The DENR Regional Office, Land Quality Supervisor must approve an Erosion and Sedimentation Control Plan. • The Highlands WWTP NPDES discharge permit will need to be revised and re -issued by NC- DWQ to reflect the new effluent limits and discharge volume. 29 8.0. LITERATURE CITED Adams, W.F., J.M. Alderman, R.G. Biggins, A.G. Gerberisch, E.P. Keferl, H.J. Porter, and A.S. VanDevender. 1990. A report on the conservation status of North Carolina's freshwater and terrestrial molluscan fauna. The Scientific Council on Freshwater and Terrestrial Mollusks, Raleigh, N.C. 246 pp. Amoroso, J.L. 1999. Natural Heritage Program List of the Rare Plant Species of North Carolina. North Carolina Natural Heritage Program, Division of Parks and Recreation. N.C. Department of Environment, Health, and Natural Resources. 85 pp. Claytor, R.A. 1995. Assessing the potential for urban watershed restoration. Watershed Protection Techniques 1(4): 165-172. Daniel, C.C. III and R.A. Payne. 1990. Hydrogeologic map of the Piedmont and Blue Ridge Provinces of North Carolina. U.S. Geological Survey Water Resources Investigations Report 90- 4035, Raleigh, N.C. 1 p. Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual, Technical Report Y-87-1. U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss. 100 p. + appendices. Fernald, M.L. 1950. Gray's Manual of Botany. Dioscorides Press, Portland, Oregon. 1632 pp. Fish, F. F. 1969. Catalog of the Inland Fishing Waters of North Carolina. North Carolina Wildlife Resources Commission, Raleigh, N.C. 188 pp. Hooper, Robert G., Andrew F. Robinson, Jr. and Jerome A. Jackson. 1980. The red - cockaded woodpecker notes on life history and management. USDA Forest Service, Southeastern Area. General Report SA-GR 9. LeGrand, H.E. Jr. 1987. Inventory of the Natural Areas of Wake County, North Carolina. Triangle Land Conservancy and N.C. Natural Heritage Program, N.C. Department of Environment, Health, and Natural Resources, Raleigh, N.C. 161 pp. Lee, D.S., J.B. Funderburg, Jr., and M.K. Clark. 1982. A distributional survey of North Carolina mammals. Occasional Papers of the N.C. Biological Survey, 1982-10. 70 pp. LeGrand, H.E. Jr. and S.P. Hall, 1999. Natural Heritage Program list of the rare animal species of North Carolina. N.C. Natural Heritage Program, Division of Parks and Recreation, Raleigh. 91 pp. Martof, B.S., W.M. Palmer, J.R. Bailey, and J.R. Harrison III, 1980. Amphibians and Reptiles of the Carolinas and Virginia. Univ of North Carolina Press, Chapel Hill, N.C. 264 pp. Menhinick, E.F. 1991. The Freshwater Fishes of North Carolina. N.C. Wildlife Resources Commission, Raleigh, N.C. 227 pp. 30 Menhinick, E.F. and A.L. Braswell. 1997. Endangered, Threatened, and Rare Fauna of North Carolina, Part IV: A Re-evaluation of the Freshwater Fishes. N.C. Museum of Natural Sciences, Raleigh, N.C. 106 pp. NatureServe Explorer An online encyclopedia of life [web application]. 2001. Version 1.6 . Arlington, Virginia, USA: NatureServe. Available: http://www.natureserve.org/explorer. (Accessed: February 27, 2002 ). N.C. Division of Air Quality. 2000. 1998 Ambient Air Quality Report. Department of Environment and Natural Resources, Raleigh. 76 pp. N.C. Division of Land Resources. 1985. Geologic map of North Carolina. N.C. Dept of Natural Resources and Community Development - Geological Survey, Raleigh. 1 p. Potter, E.F., J.F. Pamell, and R.P. Teulings. 1980. Birds of the Carolinas. University of North Carolina Press. Chapel Hill, N.C. 408 pp. Radford, A.E., H.E. Ahles, and C.R. Bell, 1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press, Chapel Hill, N.C. 1,183 pp. Robbins, C.S., B. Bruun, and H.S. Zim. Birds of North America. Golden Press, New York, N.Y. 340 pp. Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of North Carolina - Third Approximation. North Carolina Natural Heritage Program, Division of Parks and Recreation, Raleigh, N.C. 325 pp. Schueler, T.R. 1995. Architecture of urban stream buffers. Watershed Protection Techniques 1(4): 155-165. Thomas, D.J. 1996. Soil survey of Macon County, North Carolina. U.S. Department of Agriculture, Natural Resources Conservation Service, Raleigh, N.C. 322 p. + maps. Town of Highlands, December 5, 2001. Zoning Ordinance, with Amendments. U.S. Environmental Protectional Agency. 1990. National air pollutant emission estimates, 1940-1988. EPA-450/4-90-001. 68 pp. Weakley, Alan S., 2000. Flora of the Carolinas and Virginia, Working Draft of May 15, 2000. Draft version, printed for RJG&A by permission of Alan S. Weakley. Webster, W.D., J.F. Parnell, and W.C. Biggs, Jr. 1985. Mammals of the Carolinas, Virginia, and Maryland. University of North Carolina Press, Chapel Hill, N.C. 255 pp. 31 9.0. QUALIFICATIONS OF PREPARERS Robert J. Goldstein, Ph.D. is the project manager. Dr. Goldstein established RJG&A in 1985, and has managed all environmental studies, negotiations and implementation of mitigation plans. He has provided expert witness testimony and he has prepared environmental documents assessing impacts of construction projects on inland and coastal waters and wetlands, fisheries, and sea turtles as mandated by Sections 316, 401, and 404 of the Clean Water Act, and by the federal Endangered Species Act. He has conducted Phase I environmental site assessment (hazardous waste) investigations subject to RCRA, CERCLA, and the N.C. Petroleum Act, and prepared environmental documents following Fannie Mae, RTC, and ASTM guidelines. He served on the Habitat and Environmental Protection Advisory Panel of the South Atlantic Fisheries Management Council as Chairman of the North Carolina delegation. Gerald B. Pottern, M.Sc. is RJG&A's senior biologist, aquatic ecologist, and wetland delineator. He has completed COE's WET 2.0 wetland evaluation course and a COE-authorized Wetland Delineator Certification Training course, and is awaiting certification as a professional wetland scientist from the Society of Wetland Scientists. Under contract to U.S. Fish & Wildlife Service he performed a status survey of the Cape Fear shiner and prepared documentation to support its listing under the Endangered Species Act. His M.Sc. research on stream fish assemblages produced an Index of Biotic Integrity applicable to North Carolina streams. Since 1986 he has conducted surveys for protected mussels, fishes, terrestrial vertebrates, and plants. He has conducted wetland delineation and functional assessments, environmental assessments, and prepared compensatory mitigation plans. Christopher Hopper, B.Sc. is RJG&A's forester and GPS/GIS specialist. Mr. Hopper conducts terrestrial habitat inventories, protected species surveys, and jurisdictional wetland delineations. He manages and compiles field data, prepares mapping of natural resources, quantifies impacts of the altematives, and assists in document preparation. Mr. Hopper prepares ArcView and AutoCAD files of field investigation data for use by local govemments and project design engineers. H. Ward Marotti, B.Sc. is RJG&A's plant ecologist and mining specialist. He has conducted rare species surveys, wetland delineations, functional condition assessments, and habitat/resource inventories since 1992. He has authored numerous compensatory mitigation plans, mine reclamation plans, and reclamation monitoring reports. Mr. Marotti has served as technical lead for wetland delineation under contract to EPA on CERCLA and Superfund sites and completed NRCS Hydric Soils for Wetland Delineation in July 2000. He has extensive experience in aerial photo interpretation, GIS/GPS data analysis, and digital mapping. He has designed, implemented, and managed Large- and small-scale ecological monitoring databases. 32 TABLES, FIGURES, AND APPENDICES Table 1. Ambient Air Quality during 1998-99 in the Vicinity of Macon County,NCNC Table 2. Site indices for Timber Production on Soils in Macon County, Table 3. Jurisdictional Wetland Impacts in the Project Area Table 4. Stream Impacts in the Project Area Table 5. Protected Species known from Macon County, NC Table 6. Significant Natural Areas within 1.5 miles of the Service Area Figure 1. Town of Highlands VWVTP Site and Service Area, Including Annexation Areas Figure 2. Site Plan of Proposed Highlands VWVfP Improvements Figure 3. DWQ Surface Water Classifications in Highlands and Surrounding Area Figure 4. Protected Water Supply Watershed Areas in the Highlands Service Area Figures 5.0. - 5.3. Wetland and Stream Impacts Along Construction Corridors Appendix A. Protected Species Descriptions, Habitat, and Likelihood in the Project Area. Appendix B. Agency Scoping Comments. Appendix C. Public Scoping Comments, Public Meeting Minutes and Affidavit of Publication. Appendix D. Speculative Effluent Limits for the Highlands WWTP Expansion. Appendix E. EA Review Comments and Responses. 33 Table 1. Ambient Air Quality During 1998-99 in the Vicinity of Macon County NC. Air Pollutant Site: Number of Samples Total Suspended Particulates none (TSP = 0 to 45 microns) Particulate Matter -10 A: 53 (PM-10 = 0 to 10 microns) none Nitrogen Dioxide (NO2) Sulfur Dioxide (S02) Carbon Monoxide (CO) Ozone (03) N.C. Air Quality Standard (and Period of Average) annual geom. mean 24-hr 2nd maximum annual arith. mean 24-hr 99th percentile annual arith. mean A : 7,869** annual arith. mean 24-hr 2nd maximum 3-hr 2nd maximum none 8-hr 2nd maximum 1-hr 2nd maximum B : 5,064 : 211 1-hr expect 2nd max 8-hr mean 4th max 75 ug/m3 150 ug/m3 50 ug/m3 150 ug/m3 0.053 ppm 0.03 ppm 0.14 ppm 0.5 ppm 9 ppm 35 ppm 0.124 ppm 0.08 ppm Observed Maximum Value Observed Value (and Period of Average) 22 --- 41 * 44 (24-hr) MOD 0.005 0.008 0.018 0.107 0.096** 0.008 (24-hr) 0.028 (3-hr) 0.110 (1-hr) 0.098 (8-hr) Site A = Site number 37-173-0002. Center Street, Parks 7 Rec. Facility, Swain County. Site B = Site number 37-087-0035. Blue Ridge Parkway tower, mile marker 410. Haywood County. * 24-hr 99 percentile data not tabulated by DAQ; approximated using 24-hr 2nd maximum. 1998 Ambient Air Quality monitoring data. ** Table 2. Site Indicies for Timber Production on Soils in Macon County, NC Soil Series Tree Species Chandler CdF Cleveland Chestnut Complex CpD CpE Cullasaja - Tuckasegee Complex CuD Edneyville-Chestnut Complex EdC EdD EdE Nikwasi NkA Black Oak -- -- -- -- 71 71 71 -- Chestnut Oak 67 40 40 -- 69 69 69 -- Eastern White Pine 88 -- -- 98 78 78 78 86 Hickory -- -- -- -- Northern Red Oak -- 45 45 -- 76 76 76 -- Pitch Pine -- -- -- -- -- -- -- -- Red Maple -- -- -- -- Scarlet Oak -- -- -- -- 68 68 68 -- Shorleaf Pine -- -- -- 64 -- -- -- Virginia Pine -- -- -- -- 66 -- -- -- White Oak 67 -- -- -- 70 70 70 -- Yellow Poplar -- -- -- 109 97 97 97 88 Tree Species Plott PwD PwE PwF Rock Outcrop - Cleveland Complex RkF Toxaway ToA Tuckasegee - Cullasaja Complex TsC Tuckasegee - Whiteside Complex TwC Black Oak -- -- -- -- -- Chestnut Oak -- -- -- 40 -- Eastern White Pine -- -- -- -- 94 98 98 Hickory -- -- -- -- -- Northern Red Oak 85 85 85 -- -- Pitch Pine -- -- -- -- __ Red Maple -- -- -- -- _- Scarlet Oak -- -- -- -- Shorleaf Pine -- -- -- -- __ Virginia Pine -- -- -- -- -- White Oak -- -- -- -- __ Yellow Poplar 113 113 113 -- 85 109 109 e site index is the average height (in feet) of dominant and co -dominant canopy trees at 50 years. Source: Thomas, 1996. Table 3. Jurisdictional Wetland Impacts (Approximate). Acres A CH 0.010 B CH 0.017 E CH 0.022 F CH 0.002 G CH 0.011 K herb 0.001 R herb 0.006 U herb 0.002 nn.Vw TOTAL CH=Canada hemlock herb=herbaceous Table 4. Stream Impacts Along Project Construction Corridors. Permanence Substrate Width (feet) Habitat 1 P s,g,c 10 CH 2 P s,g 6 CH/herb 3 P s,g,b,br 15 CH 4 P s,g 8 CH " 5 1 s,g,Iv 5 CH 6 P s,g 10 CH 7 P s,g 5 CH 8 1 s,g 2 CH 9 1 s,g 3 CH 10 1 s,g 3 CH 11 P s,g 10 CH 12 1 s 1 CH/0 13 P s,g 15 CH 14 1 s,g 4 CH 15 P s,g 10 CH/0 16 P s,g 4 CH 17 P s,g 4 CH 18 P s,g,c 10 CH 19 P s,g,c 8 CH 20 P s,g,c,b,br 20 CH 21 P s,g 8 CH 22 P s,g,br 6 CH/herb 23 P s,g,br 4 CH 24 P s,g,br 4 CH 25 P s,g 4 CH 26 P s,g 5 herb 27 P s,g 5 CH 28 P s,g 5 CH 29 P s,g,b,br 60 CH 30 P s,g 5 CH 31 P s,g 6 CH 32 P s,g 10 CH/0 33 I s,g 5 CH/0 34 I s,g,c 5 CH/0 CH = Canada hemlock CH/0 = Canada hemlock/mixed oak herb = herbaceous lv = leaves s = sand g = gravel c = cobble b = boulder br = bedrock Table 5. Protected Species from Macon County, NC - November 2001 1 of 4 Latin Name MAMMALS Corynorhinus rafinesquii Common Name HABITATS (Legrand and Hall, 1999) Status Likelihood in State Federal Service Area Old buildings, hollow trees, caves, mines, Rafinesque's Big -eared Bat under bridges, near water SC FSC 2 Glaucomys sabrinus coloratus Carolina Northem Flying Squirrel High elevation forests, mainly Spruce -Fir E E 0 Microtus Chrotorrhinus carolinensis Southem Rock Vole rocky areas at high elevations, forests or fields SC FSC 3 Myotis septentrionalis Northern Long-eared Bat Myotis sodalis Indiana Bat active months: hollow trees and buildings, hibernation: in caves and mines SC 2 roosts in hollow trees or under loose bark E E 2 Neotoma floridana haematoreia Eastem Woodrat Sorex dispar Long-tailed Shrew Sorex hoyi winnemana Southen Pygmy Shrew Sorex palustris punctulatus Southem water shrew rocky places in deciduous or mixed forests SC FSC 2 high elevation forests with talus or rocky slopes SC 2 montane deciduous forests SC 2 stream banks in montane forests SC FSC 2 BIRDS Accipiter cooperii Cooper's Hawk forests and woodlands SC 2 Southern Appalachian Northern Aegolius acadicus Saw whet Owl Aimophila aestivalis Bachman's Sparrow Contopus cooped Olive -sided Flycatcher Falco peregrinus Poecile atricapilla practica Peregrine Falcon Southem Appalachian Black - capped Chickadee Thryomanes bewickil anus Appalachian Bewick's Wren spruce -fir forests or mixed hardwood/spruce forests open longleaf pine forests, old fields montane conifer forests (spruce/fir) with openings or dead trees (breeding) SC FSC 2 SC FSC 2 SC FSC 2 cliffs(nesting); coastal ponds and mudflats (winter foraging) E 2 high elevation forests, mainly spruce fir (breeding) SC FSC 2 woodland borders or openings, farmlands or brushy fields at high elevations E FSC 2 Table 5. Protected Species from Macon County, NC - November 2001 2 of 4 Latin Name Common Name HABITATS (Legrand and Hall, 1999) Status Likelihood in State Federal Service Area AMPHIBIANS & REPTILES Ambystoma talpoideum Aneides aeneus Clemmys muhlenbergii Cryptobranchus alleganiensis Eurycea longicauda longicauda Hemidactylium scutatum fish -free semi -permanent woodland ponds Mole Salamander (breeding); adjacent woods (foraging) SC 2 damp, shaded crevices of cliffs or rock Green Salamander outcrops in deciduous forests E 3 Bog Turtle bogs, wet pastures, wet thickets T T(SIA) 2 Hellbender large and clear fast flowing streams SC FSC 1 Longtail Salamander moist woods, floodplains SC 2 pools, bogs, and other wetlands in hardwood Four -toed Salamander forests SC 2 FISH Little Tennessee River Rosyside (LT), flowing pools streams and rivers throughout, Clinostomus funduloides Dace prefers headwater streams SC 1 Etheostoma inscriptum Etheostoma vulneratum (S), two to twelve inches of water over cobble, Turquoise Darter gravel, or bedrock SC 1 (LT) (FB), fast flowing water over rocky Wounded Darter substrates SC 1 Hybopsis monacha Luxilus chrysocephalus Notropis lutipinnis Percina squamata (LT), formerly (FB)- rocky areas in small Spotfin Chub streams (C) (LT), flowing pools in medium sized creeks and Striped Shiner streams T T 0 T 0 (S) (LT) (B), pools over coarse substrates of Yellowfin Shiner gravel and rock SC 1 (T)-fast flowing, deep, clear water over gravel, Olive Darter cobble, and rocky substrates. SC FSC 1 FRESHWATER MOLLUSKS (T), including (FB) (P) and (LT) riffles over Alasmidonta raveneliana Appalachian Elktoe sand, gravel and cobble Alasmidonta viridis Slippershell mussel E E 0 (T) (FB), riffles over coarse to rocky substrates E 0 (LT) (H), up to three meters of water, no Elliptio dilatata Spike preference of substrate SC 0 Fusconaia bamesiana Tennessee Pigtoe (LT) (H), sand/gravel riffles and shoals E 0 (T), including (FB) (P) and (LT) riffles over Lampsilis fasciola Wavy -rayed lampmussel sand, gravel and cobble SC 0 (M), riffles of high -gradient headwater Pegias fibula Littlewing Pearlymussel streams, prefers tributaries E E 0 Villosa iris Rainbow (LT) (H), headwater areas with sand and silt SC 0 Table 5. Protected Species from Macon County, NC - November 2001 3 of 4 Latin Name TERRESTRIAL MOLLUSKS Fumonelix orestes Glyphyalinia junaluskana Glyphyalinia pentadelphia Haplotrema kendeighi Inflectarius ferrissi Pallifera hemphilll Paravitrea umbilicaris Paravitrea lamellidens Patera Clarki Zonitoides patuloides Common Name Engraved covert Dark Glymph Pink Glymph Blue -foot Lancetooth Smokey Mountain covert Black Mantleslug Open Supercoll Lamellate Supercoll Dwarf Proud Globe Appalachian Gloss HABITATS (Legrand and Hall, 1999) high elevation rock crevaces, endemic to Piott Balsams mountainside deciduous forests leaflitter mountainside deciduous forests leaflitter mountainside deciduous forests leaflitter 2,500 to 6,600 feet, rotting logs, sphagnum, fungi and seepage water high elevation and sprucelflr forests (mainly above 5,000 feet) Status Likelihood in State Federal Service Area T SC SC SC • T SC moist deep leaflitter on hillsides and in ravines SC moist deep leaflitter on hillsides and in ravines, 2-12 inches below talus SC leaf litter of high -elevation mountainsides (up to 6,500 feet) SC moist deep leaflitter on hillsides and in ravines SC 0 2 2 2 2 0 2 2 0 2 LICHENS, MOSSES, AND LIVERWORTS Bryocrumia vivicolor Gorge Moss Cheilolejeunea evansii Liverwort Gymnoderma lineare Rock Gnome Lichen Plagiochila caduciloba Liverwort Schlotheimia lancifolia Highland Moss Sphenolobopsis pearsonii Liverwort Tortula ammonsiana Ammon's tortula rocks and streambanks in humid gorges, waterfall spray zones bark of hardwoods in humid gorges above 5,000 feet or in deep gorges, rock surfaces with high humidity rocks and streambanks in humid gorges, waterfall spray zones Bark of hardwoods in cove forests bark of frazier fir, in spruce/fir forests areas where nutrient rich seepage covers shaded rock surfaces E FSC E T E E T E FSC 2 2 2 2 3 0 E 2 Table 5. Protected Species from Macon County, NC - November 2001 4 of 4 Latin Name PLANTS Buckleya distichophylla Carex radfordii Delphinium exaltatum Filipendulla rubra Gentianopsis crinita Grammitis nimbata Helonias bullata Hierochloe odorata Hydrastis canadensis Hymenophyllum tayloriae Common Name Piratebush Radford's Sedge Tall Larkspur Queen -of -the -prairie Fringed Gentian West Indian Dwarf Polypody Swamp Pink Holy Grass Goldenseal Gorge Filmy Fem HABITATS (Legrand and Ha11, 1999) parasite of hemlocks, needs open canopy rich cove forests and marble ravines grassy balds, glades, open woodlands, usually over mafic rock moist lowland areas with open canopy, bogs, marshes moist meadows and hillside seeps wet, mossy rock ledges wetland areas with saturated (not flooded) soils moist meadows or swales rich woodlands moist grottoes and spray cliffs in escarpment gorges with high rainfall Status Likelihood in State Federal Service Area E FSC E E-SC FSC E E-SC E-SC T-SC T E E-SC 2 2 2 2 2 2 2 2 2 2 Isotria medeoloides Lysimachia fraseri Senecio m!!lefolium Small Whorled Pogonia Fraser's Loosestrife Divided -leaf Ragwort Spiraea virginiana Sporobolus heterolepis Trichomanes boschianum Trichomanes petersii open, dry woodlands, usually with acid soils roadsides, forests, and alluvial meadows on or near rock outcrops requires periodic scouring floods, rocky riverbanks in gorges or canyons pine barrons over olivine moist rocks and humid ravines, waterfall spray zones moist rocks and humid gorges basic to circumneutral soils in rich coves and Trillium discolor Mottled Trillium on forested slopes (T)-Tennesssee, (M)-Mississippi Drainages: River Basin Abbeviations: (C)-Callasaja (LT) -Little Tennessee, (FB)-French Broad, (H)-Hiwassee, (B)-Broad, (S)-Savannah, (C)-Cane E= Endangered, T= Threatened, SC= Special Concem, FSC= Federal "Species of Concern" O=Unlikely to occur in the service area or in the Cullasaja River Below Highlands. 1=Lilely to occur in lower Cullasaja River or Chattooga River Tributaries Downstream of the servie area. 2=May occur in Highlands service area, based on nearby records or presence of suitable habitat 3=Very likely in Highlands service area, based on recent records within the service area. Virginia Spirea Prairie Dropseed Appalachian Filmy -fern Dwarf Filmy -fern E T E FSC T-SC FSC 2 2 2 E T E T T 0 2 2 2 2 Table 6. Natural Heritage Program Registered Heritage Areas and Dedicated Nature Preserves within 1.5 Miles of the Highlands VV TP Service Area - Macon County, NC - 2002 Name Designation Ownership Management Acres CHATTOOGA RIVER GORGE/ELLICOTT ROCK RHA RHA FEDERAL USDA -FOREST SERVICE 1997 CHATTOOGA RIVER GORGE/ELLICOTT ROCK RHA RHA FEDERAL USDA -FOREST SERVICE 1997 COLE MOUNTAIN/SHORTOFF MOUNTAIN RHA RHA FEDERAL USDA -FOREST SERVICE 56 CULLASAJA GORGE RHA RHA FEDERAL USDA -FOREST SERVICE 1425 CULLASAJA GORGE RHA RHA FEDERAL USDA -FOREST SERVICE 1425 HENRY M. WRIGHT PRESERVE DNP DNP PRIVATE THE NATURE CONSERVANCY 22 KELSEY RHA RHA FEDERAL USDA -FOREST SERVICE 256 OLIVE RHA RHA PRIVATE NC BOTANICAL GARDEN 4 PINKY FALLS RHA RHA PRIVATE NC BOTANICAL GARDEN 6 SATULAH MOUNTAIN SUMMIT RHA RHA PRIVATE SATULAH SUMMIT-RAVENEL PARK, INC 54 SLICK ROCK RHA RHA FEDERAL USDA -FOREST SERVICE 11 WHITESIDE MOUNTAIN RHA RHA FEDERAL USDA -FOREST SERVICE 220 H h ELF S� Pi 6 ER Wel Ra W D ea] 102 0 V Macon County, North Carolina Service Area Boundary Existing Town Limits 1O6North Annexation 1U6South Annexation F!ot Mountain Annexation �--�Highlands Falls Annexation North Annexation /\/Proposed Collection System Figure 1. Town of Highlands VVVVTP and Potential Annexation Area Locations Macon County, NC ENVIRONMENTAL CONSULTANTS Rv|oinh.mG ,xww40xcamxoa.cnm (C-Tr) \ WWTP Outfall i andall Lake — ^ i RA S-3Tr) Chatooga River tributaries c'eek lc-") Macon County, North Carolina O 4, • 0 0 0 Figure 3. DWQ Water Quality Classifications of Streams and Lakes Draining the Service and Project Areas- Macon and Jackson Counties, NC Wa 'yam 8coLoariedeo, ENVIRONMENTAL CONSULTANTS Raleigh, nc www.rjgaCarolina.com Classification Boundary J Service Area 0.5 0.5 Miles 1 OC ob 10 •000 4n Figure 4. Protected Water Supply Watersheds and WS-Critical Areas in the Expanded Highlands Service Area, Macon County, N.C. DWQ Supplementary Usage Classifications -Tr and -ORW are not shown. Robert J. Goldstein & Associates, Inc ENVIRONMENTAL CONSULTANTS 8480 Garvey Drive, Raleigh NC 27616 v • 39• 3- , • c ln4 /1 l \ ) Figure 5.0. Wetland and Stream Impacts Index - Town of Highlands Wastewater System Expansion - Macon County, NC ENVIRONMENTAL CONSULTANTS Raleigh, NC www.rjgaCarolina.com LEGEND Service Area Boundary D Existing Town Limits M 106 North Annexation IM 106 South Annexation E3 Flat Mountain Annexation North Annexation Al Environmentally Preferred Alignment Jurisdictional Surface Waters Wetlands 2000 0 2000 Feet c\ • • , • I 181 w • Ns\c- e‘it, LEGEND Service Area Boundary 1=1 Existing Town Limits 106 North Annexation 106 South Annexation ED Flat Mountain Annexation North Annexation NEnvironmentally Preferred Alignment A/Jurisdictional Surface Waters _ Wetlands ? Stream Crossings 500 0 500 Feet •-• • , . ••.\," Figure 5.1. Wetland and Stream Impacts Noth Annexation Area- Town of Highlands Wastewater System Expansion - Macon County, NC MVIRONMENTAL CONSULTANTS Raleigh, NC www.rjgaCarolina.com ii • f< toy 81, f 1411 w _ • LEGEND N� Service Area Boundary ® Existing Town Limits ® 106 North Annexation ® 106 South Annexation ® Flat Mountain Annexation North Annexation Environmentally Preferred Alignment A/Jurisdictional Surface Waters Wetlands ? _ Stream Crossings [? L Impacted Wetlands 500 0 500 Feet Figure 5.2. Wetland and Stream Impacts Flat Mountain Annexation and US 64 - Town of Highlands Wastewater System Expansion - Macon County, NC ENVIRONMENTAL CONSULTANTS Raleigh, NC www.rjgaCarolina.com w.ip 1, _h ; 4.ry. ram ,- •—, •,. . r�� �'",-. 1.' i Alt 1 Ilfh : 44 > % J_ )1t1 fA, ,nl \tJq( I,i1 �► t► • � ;colt I r• • MENTS;%' t_%7(1 fr it • t► LEGEND Service Area Boundary ® Existing Town Limits ® 106 North Annexation ® 106 South Annexation ® Flat Mountain Annexation North Annexation "Environmentally Preferred Alignment Jurisdictional Surface Waters Wetlands Stream Crossings ? Impacted Wetlands 500 0 ti tl 500 Feet Figure 5.3. Wetland and Stream Impacts Hwy. 106 North and South Annexation Are, Town of Highlands Wastewater System Expansion - Macon County, NC ri f �ala�afer�v 91-'..eilaaoektlev ENVIRONMENTAL CONSULTANTS Raleigh, NC www.rjgaCarolina.com rKv.� •y 1 t l . yam. — , APPENDIX A. Protected Species Descriptions, Habitat Requirements, and Likelihood of Occurrence in the Highlands Project Area. The proposed VWVfP construction area was cleared and graded in 1994, and does not provide suitable habitat for any of the 71 state or federal protected species known to occur in Macon or Jackson counties. None of these species was observed during the field survey and none is likely to occur on the site, other than as an occasional transient. However, the existing and future Highlands wastewater service area contains suitable habitat for many of these species, as documented below and summarized in Table 5. A.1. Rafinesque's Big -eared Bat (Corynorhinus rafinesquii). North Carolina Special Concem, Federal Species of Concern. This bat has large ears that are curled when at rest, and fleshy knobs between the nostrils and eyes. The fur is longer than on the similar P. townsendii, and the hairs are black at the base and yellow to white at the tips. It roosts in dilapidated buildings near permanent water, and forages over the water surface at night. It is apparently non -migratory, and hibemates in winter. NHP has one historic element occurrence record of this bat from 1948 inside the Town limits. It probably occurs as an occasional transient in the Highlands area, as no regular roosting sites have been found in this area. A.2. Northern Long-eared Bat (Myotis septentrionalis). North Carolina Special Concem. This bat is dull brown above and paler below. The long ears, which extend past the muzzle when pointed forward, and the long pointed tragus distinguish this species from other Myotis species (Webster et al., 1985). It inhabits the westem mountain counties of North Carolina (Lee et al., 1982) where it roosts singly or in small matemity groups near caves or mines, but never in large colonies and seldom in buildings. This species typically swarms around cave entrances in late summer. NHP has a 1965 record of the long-eared bat inside the Town limits near Ravenel Lake. It probably occurs as an occasional transient in the Highlands area, as no regular roosting sites have been found in this area. A.3. Indiana Bat (Myotis sodalis). North Carolina Endangered, Federal Endangered. This bat is medium-sized and resembles the little brown bat (Myotis lucifugus). Although its belly is pink, its fur is dull gray -brown. Basal portions of the hair on its dorsum are lead colored. M. sodalis feeds on insects along forested stream corridors; riparian areas without trees are generally not used (LaVal et al, 1976, 1977). Buildings and loose bark provide summer roosting sites, while limestone caves are used during winter. NHP has no element occurrence record of the Indiana bat within two miles of the Highlands area, but individuals may occur sporadically in and around Highlands, based on sightings elsewhere in Macon and Jackson counties. A.4. Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus). North Carolina Endangered, Federal Endangered. The Carolina northern flying squirrel is 10 to 12 inches long. Adults are gray with a brown, tan, or ruddy patch dorsally, and gray to white to white ventrally. Juveniles have a dark gray dorsum and off-white undersides. This squirrel feeds on lichens, fungi, seeds, fruit, and buds in mature forests (Weigl, 1968; Maser et. al., 1985; McKeever, 1960). It lives in transition zones between coniferous and northern hardwood forests, usually above 5000 feet elevation. Both forest types provide food sources, but hardwood areas are used for nesting. NHP has no element occurrence record within 1.5 miles of the Highlands VWVfP or wastewater service area, most of which is too low in elevation. A.S. Eastern Woodrat (Neotoma floridana haematoreia). North Carolina Special Concem, Federal Species of Concern. This gray -brown rodent has a compact body and black -tipped hairs. The tail is dark dorsally and nearly white ventrally. Colonies construct elaborate nests of twigs, leaves, and trash in crevices or caves among rock outcrops in deciduous forests, and commonly aggregate shiny objects in and around the nest site. NHP has two extant element occurrence records of the eastem woodrat close to the proposed service area. No date is given for an occurrence near Little Foderstack Mountain southeast of town. Another woodrat site was found in 1990 near Granite City along the Macon/Jackson County line. Based on these recent records, other unknown populations may occur in the Highlands service area. A.6. Southern Rock Vole (Microtus Chrotorrhinus carolinensis). North Carolina Special Concem, Federal Species of Concern. The rock vole is similar to the meadow vole (M. pennsylvanicus) but has darker fur and a yellow to orange snout. The southern population is disjunct from northern populations that occur from northeast Pennsylvania to Canada. It prefers rocky areas in forests or fields, where it burrows under logs, moss, and leaf litter (Webster et al, 1985). NHP has one recent record of the southern rock vole inside the Town limits from 1990 on the lower slopes of Satulah Mountain above Pierson Drive. A.7. Long-tailed Shrew (Sorex dispar). North Carolina Special Concem. The long-tailed shrew occurs in deep rock crevices in cool, moist forests and along mountain streams. Its fur is slate gray dorsally, and lighter ventrally. Long-tailed shrews have thick tails 80 percent as long as the head and body length. Their average length including the tail is 4.5 to 5.5 inches. NHP has a February 1992 record of this shrew from Cullasaja Gorge northwest of the Highlands WWTP. Other unknown populations may occur along forested stream corridors in the Highlands service area. A.B. Southern Water Shrew (Sorex palustris punctulatus). North Carolina Special Concem, Federal Species of Concern. This shrew is dark gray to black dorsally and on the upper tail, and lighter on its belly and underside of the tail. It is the largest Sorex in North Carolina, readily distinguished by its large, densely haired feet and toes. It prefers streams bounded by beech, maple, rhododendron, and birch, and mountain bogs dominated by willow, spruce, and hemlock (Webster et al., 1985). NHP has a 1995 record of the southern water shrew along East Fork Overflow Creek southwest of Highlands. Other unknown populations may occur along forested stream corridors in the Highlands service area. A.9. Southern Pygmy Shrew (Sorex hoyi winnemana). North Carolina Special Concem. This shrew has ruddy to brown fur in summer and gray to brown fur in winter. The body and tail are darker above than below. The southem pygmy shrew is the smallest mammal in North America (Webster et al, 1985). It inhabits well -drained ridges and slopes in hardwood forests, but has also been collected in clear-cut areas. It frequents rotting Togs, stumps, and leaf litter, and is seldom found near permanent water (Clark, 1987). NHP has no element occurrence records of the southem pygmy shrew within two miles of Highlands, but the future service area contains suitable habitat that may support unknown populations of this shrew. A.10. Southern Appalachian Saw -whet Owl (Aegolius acadicus). North Carolina Special Concem, Federal Species of Concern. The southern Appalachian saw -whet owl frequents the spruce-fir/hardwood forest transition zone. It nests in abandoned woodpecker holes 14 to 60 feet above ground. It is distinguished from the screech owl (Otus asio) by its smaller size and lack of ear tufts. NHP has recent records of this bird on the Highlands USGS quadrangle, but no record within 1.5 miles of the Highlands VWVTP or service area, most of which is too low in elevation for spruce -fir forests. A few of the higher ridges with mature forests in the future service area may provide suitable habiatat for this owl. A.11. Cooper's Hawk (Accipiter cooperii). North Carolina Special Concem. Cooper's hawk is larger than the more common sharp -shinned hawk (Accipiter striatus), and has a proportionately larger head and wider, more rounded tail. Both species are blue -gray above with rusty bars below as adults, and dark brown above with brown streaks below as juveniles (Potter et al., 1980). Cooper's hawk requires large tracts of contiguous forest, either uplands or floodplains, although it commonly forages in fields at the edge of forests. It is a winter resident in the eastem two-thirds of North Carolina and migrates to the mountains or to northern latitudes during spring to breed (Potter et al., 1980). NHP has no element occurrence record within 1.5 miles of the Highlands VWVfP or service area, but suitable habitat exists in much of the undeveloped portions of the future service area. A.12. Peregrine Falcon (Falco peregrinus). North Carolina Endangered. The peregrine falcon is a medium-sized raptor with long, pointed wings and a long tail. The adult's slate gray body is black -barred on the wing, tail feathers, and flanks, the throat is white and the sides of the head bear black markings resembling a moustache. The lower body is white and ruddy, and spotted and barred with black. The falcon preys on bluejays, flickers, meadowlarks, pigeons, starlings, shorebirds, waterfowl, and other birds. It hunts over open waterways, fields, and wetlands. Preferred nesting sites are fissures in cliffs, but buildings are also used. NHP has a recent nesting record of peregrine falcon on Whiteside Mountain within 1.5 miles of the Highlands service area. The numerous lakes in Highlands offer good foraging areas for this falcon, and other suitable nesting sites may exist in the service area. A.13. Bachman's Sparrow (Aimophila aestivalis). North Carolina Special Concem, Federal Species of Concern. Bachman's sparrow resembles the field sparrow (Spizella pusilla), which shares its habitat, but is grayer and lacks a white eye -ring (Potter et al., 1980; Robbins et al., 1966). It is secretive and usually seen only when males are singing during April and May. It nests in grassy undergrowth of open pine woods, savannahs, and abandoned fields with scattered tall trees, especially in areas recently burned. NHP has no records within 1.5 miles of the Highlands WWTP or service area. Suitable habitat may exist within the service area. A.14. Olive -sided Flycatcher (Contopus cooperi). North Carolina Special Concem, Federal Species of Concern. This flycatcher inhabits hemlock and spruce -fir forests in the mountains of western North Carolina. It is a transient across the Piedmont and Coastal Plain during May, and from August through October. It is stocky with a heavy bill, and is an insectivore. It nests on a branch seven to 100 feet above the ground, usually close to the trunk (Potter et al., 1980). NHP has one historic nesting record from inside the Town limits, but that site was subsequently cleared for development. Suitable habitat may exist within the service area. A.15. Southern Appalachian Black -capped Chickadee (Poecile atricapilla practica). North Carolina Special Concem, Federal Species of Concern. Black -capped chickadees have whiter cheeks, slightly larger bodies, and rustier sides than common Carolina chickadees. They breed above 4,000 feet in spruce -fir forests, and over - winter at lower elevations, where they mingle with Carolina chickadees. Nesting cavities are excavated in the trunks of dead trees, five to 60 feet above ground. Cavities are constructed by pairs from April to early May. NHP has no nesting records within 1.5 miles of the Highlands VWVfP or service area, but suitable habitat may exist on some high elevation forested ridges within the future service area. Non -breeding black -capped chickadees likely occur in town, especially at bird feeders during winter. A.16. Appalachian Bewick's Wren (Thryomanes bewickii altus). North Carolina Endangered, Federal Species of Concern. Once plentiful, the decline of the Appalachian Bewick's wren coincides with the introduction of the European starling and the house sparrow in the early 1900s. This wren occurs in high elevation rural areas, often nesting in abandoned buildings or junked automobiles. It is brown above, white below, and has a white eye -line. The long, rounded tail is frequently jerked sideways. Males build several nests from February to May, and one is selected by the female. The male then spends much time perching on the unused nests which serve as decoys to fool the brown -headed cowbird (Molothrus ater), a nest parasite. NHP has three historic records inside the Town limits, but all three sites have been destroyed. Although NHP has no recent records of this wren near Highlands, suitable habitat may exist in rural portions of the future service area. A.17. Bog Turtle (Clemmys muhlenbergii). North Carolina Threatened, Federal Threatened by Similarity of Appearance. The bog turtle has a plain brown carapace up to four inches long and a prominent yellow or orange blotch on each side of the head and neck. It lives in rivulets and vegetated shallows in bogs, marshes, wet meadows, and other upland depression wetlands with open canopy and a soft, muddy substratum (Martof et al, 1980). Frequently scoured floodplains are not suitable, but seeps or bogs along flood plain edges with minor scouring may be suitable. The bog turtle is usually buried beneath vegetation or in mud, and rarely encountered except during the spring mating season (Palmer and Braswell 1995). NHP has records of two potential bog turtle sites within one mile outside the Highlands service area, one above Randall Lake in 1992 and the other along Edwards Creek in 1980. It is unknown whether bog turtles presently exist at these sites, as it often requires repeated surveys before a bog turtle is detected. Other suitable sites may exist in the service area. A.18. Mole Salamander (Ambystoma talpoideum). North Carolina Special Concem. This stocky, gray -brown salamander lives in burrows under logs and boulders in forests, and breeds during winter and early spring in fish -free vemal pools (Martof et al., 1980). The breeding pools may be flood plain depressions, upland depressions, Carolina bays, sinkhole ponds, bogs, or seeps. The larvae feed on aquatic invertebrates. NHP has no record of the mole salamander within several miles of the Highlands VWVTP or service area. Suitable habitat may exist within the service area. A.19. Longtail Salamander (Eurycea longicauda longicauda). North Carolina Special Concem. This salamander is four to eight inches long including a tail that comprises two-thirds of its length. It is yellow to orange -red with black spots on the sides and back. It prefers damp caves, seeps, and small rocky streams with shale and limestone in the Little Tennessee River basin (Martof, et al., 1980). Eggs are attached to rocks or logs just above the waterline in cavities or burrows along the banks of small streams. They hatch in winter and the larvae are aquatic. NHP has no record of the Iongtail salamander within several miles of the Highlands VWVI'P or service area, but suitable habitat may exist within the service area. A.20. Four -toed Salamander (Hemidactylium scutatum). North Carolina Special Concem. This small, slender salamander has a ruddy brown dorsum and a white belly with conspicuous black spots. It has four toes on each hind foot, and a constriction at the base of the tail (Hall, 1991). Adults are terrestrial, but rarely encountered except when breeding. Eggs are laid in late winter or early spring beneath clumps of moss on logs or rocks at the edge of fish -free vemal pools, bogs, or seeps. NHP has no record of the four -toed salamander on the Highlands USGS quadrangle, but suitable habitat may exist within the service area. A.21. Green Salamander (Aneides aeneus). North Carolina Endangered. This salamander lives in moist crevices of rock outcrops in hardwood forests. It has green to yellow -green patches on a dark brown to gray dorsum. Eggs are laid in late spring to early summer, and attended by females during the three month development period. Newly hatched young are 20 mm long, terrestrial, and similar to adults. NHP has numerous historic and recent records of the green salamander in and around the Highlands area, including sites near Bowry Road, Sassafras Knob, Highlands Falls, Satulah Falls, Blue Valley, Granite City, Little Fodderstack Mountain, and Brooks Creek. None of these sites is close to the VW TP property, which does not contain suitable habitat. Other unknown populations may also occur in the Highlands service area. A.22. Hel!bender (Cryptobranchus alleganiensis). North Carolina Special Concern, Federal Species of Concern. This large salamander occurs in clear, high gradient rivers with large flat rocks, and feeds on insects and crayfish. It reaches 12 to 29 inches in length, and newly hatched individuals are 30 mm long. It is brown to gray with dark spots. Eggs are laid in summer under flat rocks in current, and attended by the male until hatching. At 18 months of age the larvae lose their extemal gills and become juveniles. NHP has no record of the hellbender on the Highlands USGS quadrangle, but has recent and historic records from the lower Cullasaja River between Cullasaja Gorge and Town of Franklin. Streams in the Highlands service are too small to provide suitable habitat. Impacts to water quality and hydrology of the Cullasaja River may affect this salamander. A.23. Little Tennessee Rosyside Dace (Clinostomus funduloides ssp). North Carolina Special Concem. The Lithe Tennessee rosyside dace, also known as smoky dace, is endemic to upland drainages in the Little Tennessee River. It feeds primarily on drifting insects (Menhinick and Braswell, 1997). The body is olive with a diffuse dark band along the side and red behind the gill cover (Rohde et al., 1994). In breeding males the red pigment extends the entire side, with a gold line stripe above the red area. It is most common in flowing pools of rocky headwater streams, and rare in large streams. NHP has no record of this fish on the Highlands USGS quadrangle, but recent records exist from the Cullasaja River and several tributaries downstream of Highlands, below Dry Falls. Streams in the Highlands service area may contain suitable habitat for this dace, but Dry Falls and Sequoyah Dam prevent its colonization of the upper Cullasaja River. A.24. Spotfin Chub (Cyprinella monacha). North Carolina Threatened, Federal Threatened. The spotfin chub, also known as turquoise shiner, has a silvery -blue laterally compressed body with small scales, a faint lateral stripe extending to a prominent black caudal spot, and a long snout with subterminal mouth and maxillary barbels (Rohde et al., 1994; Menhinick and Braswell, 1997). Breeding males develop turquoise sides with two broad white vertical bars and turquoise fins with white edges. It occurs in rocky areas in clear, medium to large streams, and spawns in rocky crevices in moderate current. The only extant population known in North Carolina is in the Little Tennessee River between Lake Emory dam and the backwaters of Fontana Lake. It is apparently extirpated from other locales in its historic range, which might have included the lower Cullasaja River near Franklin (Menhinick and Braswell, 1997; WRC website 2001). NHP has no record of this minnow in the Cullasaja River watershed or on the Highlands USGS quadrangle. A.25. Striped Shiner (Luxilus chrysocephalus). North Carolina Threatened. The striped shiner is a deep, laterally compressed minnow with four dark longitudinal stripes along the back (Rohde et al, 1994; Menhinick and Braswell, 1997). It prefers flowing pools in medium to large streams, feeds on drifting insects, and spawns primarily on nests of the river chub (Nocomis micropogon). The striped shiner has recently been collected in the Little Tennessee River in northern Macon County, but NHP has no records from the Cullasaja River watershed or elsewhere upstream of Lake Emory, where it might have occurred historically. A.26. Wounded Darter (Etheostoma vulneratum). North Carolina Special Concem. The wounded darter is olive with red spots and narrow horizontal lines on the sides, and dark margins in the second dorsal, caudal, and anal fins (Rohde et al., 1994; Menhinick and Braswell, 1997). It feeds on benthic invertebrates and spawns on the undersides of large rocks in moderate to swift current in rocky riffles in the Little Tennessee River and major tributaries that include the lower Cullasaja River below Cullasaja Gorge (NHP database and William McLamey field records). NHP has no record of this fish above the gorge or on the Highlands USGS quadrangle. A.27. Olive Darter (Percina squamata). North Carolina Special Concem, Federal Species of Concern. The olive darter is green to gray with a row of dark blotches along the side, an orange submarginal band in the spiny dorsal fin, small scales, and an elongate head (Rohde et al, 1994; Menhinick and Braswell, 1997). It feeds on benthic invertebrates and spawns on gravel shoals in moderate to swift current. It occurs in deeper riffles and high gradient runs with cobble and boulders in the Little Tennessee River and its major tributaries, including the lower Cullasaja River below Cullasaja Gorge (NHP database and William McLarney records). NHP has no record of this fish above the gorge or on the Highlands USGS quadrangle. A.28. Turquoise Darter (Etheostoma inscriptum). North Carolina Special Concem. The turquoise darter has six dark blotches on its back and on each side. The scales on its flanks have red centers forming horizontal rows of dots (Rohde et al., 1994; Menhinick and Braswell, 1997). The face, cheek, and breast become turquoise during breeding, especially in males. This darter occurs in riffles two to 12 inches deep in small streams with gravel, cobble, and bedrock substrata, and feeds on benthic invertebrates. It is endemic to the Savannah River basin, including some Chattooga River tributaries that drain southem and eastern Highlands (NHP database). NHP has no record of this fish within one mile of the service area, but perennial streams in southem and eastem Highlands may be suitable and may support unknown populations. It does not occur in the Cullasaja River or elsewhere in the Tennessee River basin. A.29. Yellowfin Shiner (Notropis lutipinnis). North Carolina Special Concem The yellowfin shiner is reddish -brown dorsally with a broad dark stripe down the side and reddish fins. The head and fins of breeding males turn yellow to orange. This minnow occurs in runs and pools in small streams with gravel, cobble, and bedrock substrata, where it feeds on benthic and drifting invertebrates, and spawns on chub nests (Nocomis spp.). In Macon County the yellowfin shiner is limited to the Savannah River basin, including Chattooga River tributaries, which drain southem, and eastem Highlands (NHP database). NHP has no record of the yellowfin shiner within one mile of the service area, but perennial streams in southern and eastern Highlands may be suitable and may support unknown populations. It does not occur in the Cullasaja River watershed and is not native in the Tennessee River basin. A.30. River Mussels (Seven Species). Seven species of river mussels are known from the Little Tennessee River downstream of Lake Emory in Macon County. They are the slippershell mussel (Alasmidonta viridis - North Carolina endangered), Appalachian elktoe (Alasmidonta ravenellana — North Carolina and Federal endangered), spike (Elliptio dilatata - North Carolina special concem), Tennessee pigtoe (Fusconaia bamesiana - North Carolina endangered), wavy -rayed lampmussel (Lampsilis fasciola - North Carolina special concem), littlewing pearlymussel (Pegias fabula — North Carolina and Federal endangered), and rainbow mussel (Villosa iris - North Carolina special concern). The rainbow mussel occurs in backwaters with fine sand and silt, or under large rocks in faster flows. The littlewing pearlymussel lives in riffles in high -gradient small streams. The five other species occur in runs and shoals of medium to large streams with moderate to fast current with substrata of coarse sand, gravel, and cobble (Adams et al. 1990). Some of these mussels may have historically occurred in the Cullasaja River and tributaries, but no mussel surveys were conducted until long after deforestation, agriculture, dams, and development changed the habitat. No current or recently extirpated populations are known upstream of Lake Emory. None of these species is reported from the Cullasaja River watershed or on the Highlands USGS quadrangle (NHP and WRC databases) despite mussel surveys by WRC and other agencies during the past 20 years. Consequently, none is likely to be affected by this project. The biological nutrient removal and non -chlorine disinfection to be installed in the expanded WWTP should provide improved effluent quality that may benefit mussel habitat downstream of Lake Sequoyah Dam and may allow future recolonization (by human translocation) to the lower Cullasaja River. WRC and others are developing techniques to propagate and move protected mussels in order to re-establish lost populations. Successful recolonization will also depend on riparian corridor protection. A.31. Terrestrial Mollusks (Ten Species). The Plott Balsam Mountains 20 miles north of Highlands are home to two endemic terrestrial snails. The engraved covert (Fumonelix orestes - North Carolina threatened) lives at high elevations in rock crevices, venturing out during wet weather. The Smokey Mountain covert (Inflectarius fern►ssi - North Carolina threatened), endemic to both the Plott Balsam and Great Smokey mountain ranges, occurs between 2,500 and 6,600 feet near rotting logs, sphagnum moss, fungi and seepage water (Adams et al. 1990). The dark glyph (Glyphyalinia junaluskana - North Carolina special concem), pink glyph (Glyphyalinia pentadelphia - North Carolina special concem), and blue -foot lancetooth (Haplotrema kendeighi - North Carolina special concem) occur in leaf litter on mountainside upland and deciduous forests, and venture into the open during wet weather. The open supercoil (Parabitrea umbilicaris - North Carolina special concern), Appalachian gloss (Zonitoides patuloides - North Carolina special concern), and lamellate supercoil (Paravitrea lamellidens - North Carolina special concem) occur in deep moist leaf litter on hillsides and in ravines. Lamellate supercoil has also been found on high elevation slopes, two to 12 inches below the talus on mossy patches that were supporting herbaceous vegetation. The dwarf proud globe (Patera clarki - North Carolina special concern) occurs in leaf litter at middle and high elevation mountain sides up to 6,500 feet. Black mantleslug (Pallifera hemphilli - North Carolina special concern) is known mainly from spruce -fir forests above 5,000 feet, and is active during wet weather (The Scientific Council on Freshwater and Terrestrial Mollusks, 1990). NHP has no record of these ten terrestrial snails within 1.5 miles of the project service area or elsewhere on the Highlands USGS quadrangle. Suitable habitat may exist in the proposed service area for some of these species that occur on moist wooded slopes and are not limited to elevations above 4,500 feet. Terrestrial snail distributions are poorly known (compared with other rare species groups) and many undetected populations may exist, especially in southwestern NC. A.32. Rock Gnome Lichen (Gymnoderma lineare). North Carolina Threatened, Federal Endangered. This member of the reindeer moss family is the only member of its genus in North America. It reproduces asexually and forms dense, colonial colonies on rock surfaces with high humidity. Rock gnome lichen is blue -grey on the upper surface, white below, and black basally. The apothecia are borne singly or in clusters, and terminally on the tips of the squamules, and have been found from July through September. Rock gnome lichen is endemic to the southem Appalachian mountains of North Carolina and Tennessee, where 32 populations remain. Only seven of the remaining populations cover an area larger than two square meters, and most are above 5,000 feet, where frequent fog provides moisture, and on vertical rock faces. They also grow deep in gorges at lower elevations. NHP has a 1996 record of this lichen on the southwest slope of Whiteside Mountain, one mile northeast of the proposed service area. Other unknown populations may exist in the service area, although suitable habitat is limited. A.33. Liverworts (Three Species). Three protected liverworts are known from Macon and Jackson counties. Cheilolejeunea evansii (North Carolina proposed endangered) occurs on the bark of hardwoods in humid gorges and Plagiochila caduciloba (North Carolina endangered) occurs on rocks and stream banks in humid gorges and in the spray zone of waterfalls. Sphenolobopsis pearsonii (North Carolina proposed endangered and Federal species of concern) grows on Frazier fir bark in high -elevation spruce -fir forests (Amoroso, 1999). NHP has two P. caduciloba records within 1.5 miles of the service area, at Dry Falls in 1978 and at Glen Falls in 1961. NHP had no records for the other two liverworts within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations of these liverworts may exist along forested stream corridors in the service area. A.34. Mosses (Three Species). Three protected moss species are known from Jackson and Macon counties. Gorge moss (Bryocrumia vivicolor- North Carolina endangered and Federal species of concern) occurs on rocks and stream banks in humid gorges and in the spray zone of waterfalls, and Highland moss (Schlotheimia lancifolia - North Carolina threatened) occurs the bark of hardwoods in cove forests. Ammon's tortula (Tortula ammonsiana - North Carolina endangered) occurs where nutrient rich seepage covers shaded rock faces. NHP has three 1997 records of Highland moss within Town limits and within the Highlands Falls annexation area. NHP has no records for gorge moss or Ammon's tortula within 1.5 miles of the service area. Unknown populations of these mosses may exist along forested stream corridors in the service area. A.35. Filmy -ferns (Three Species). The Appalachian filmy-fem (Trichomanes boschianum - North Carolina threatened) occurs in the spray zone of waterfalls and in rocky seeps (Amoroso, 1999). Dwarf filmy-fem (Trichomanes petersii - North Carolina threatened) occurs on moist rocks in humid gorges. Gorge filmy fern (Hymenophyllum tayloriae - North Carolina proposed endangered) inhabits moist grottos and spray cliffs in escarpment gorges with high rainfall (Amoroso, 1999). NHP has one record of Appalachian filmy-fem within 1.5 miles of the service area at Dry Falls in 1949, but the site has been destroyed. NHP has no record of dwarf filmy-fem within 1.5 miles of the service area, but recent records do exist on the Highlands USGS quadrangle. NHP has one record of gorge filmy-fem within 1.5 miles of the service area in 1998 near Brooks Creek. Other unknown populations of these ferns may exist along forested stream corridors in the service area. A.36. West Indian Dwarf Polypody (Grammitis nimbata). North Carolina Endangered, Federal Species of Concern. Macon County has the only known continental population of this West Indian fem. It is a perennial that grows from tiny rhizomes on wet, mossy rock ledges. Its tiny leaflets are covered with dark brown bristles (Radford et al, 1968). NHP has one record within 1.5 miles of the service area during 1989 at Dry Falls. Other unknown populations of this fern may exist along forested stream corridors in the service area. A.37. Piratebush (Buckleya distichophylla). North Carolina Endangered, Federal Species of Concern. Piratebush is a small, dioecious, parasitic shrub attached to hemlock roots that blooms from April to May. Because hemlock is a shade tolerant and densely foliated tree, and piratebush requires open sunlight, the parasite is typically encountered only in openings of hemlock stands on open cliffs or bluffs (Radford et al., 1968). NHP has no records of piratebush within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Hemlock forest is common in Highlands, and unknown populations of piratebush may occur in the service area. A.38. Queen of the Prairie (Filipendulla rubra). North Carolina Endangered. The five -petaled, pink flowers of this perennial herb appear from June to July and are borne in a flat-topped panicle. It grows in moist lowland areas with an open canopy and in bogs (Radford et al., 1968). NHP has no records of queen of the prairie within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in wet meadows or seeps in the Highlands service area. A.39. Fringed Gentian (Gentianopsis crinita). North Carolina Endangered and Special Concern. Fringed gentian is an annual herb bearing blue to purple and occasionally white flowers from September to October. It grows in moist meadows and near hillside seeps (Radford et al., 1968). NHP has no records of fringed gentian within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in wet meadows or seeps in the Highlands service area. A.40. Holy Grass (Hierochloe odorata). North Carolina Endangered. The brown, bronze or purple flowers of this prairie disjunct appear in April. Plants arise from the previous year's growth in moist meadows or swales (Femald, 1950). NHP has no records of holy grass within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in wet meadows in the Highlands service area. A.41. Virginia Spirea (Spiraea virginiana) North Carolina Endangered, Federal Threatened. During June and July, Virginia spirea bears cream colored flowers on branched and flat- topped axes. Up to 10 feet tall, the arching, upright stems are alternately leaved. Leaves are polymorphic. The plant reproduces clonally, forming dense clumps in rock crevices and around boulders. Virginia spirea is a primary successional species that inhabits rocky river banks in gorges and canyons and requires periodic scouring floods to control competition by taller woody plants. NHP has no record of Virginia spirea within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. No suitable habitat exists in the Highlands service area. A.42. Radford's Sedge (Carex radfordii). North Carolina Proposed Endangered. Radford's sedge occurs on calcareous, often rocky, well -drained soils of mesic cove forests and woodlands. Most of the few known sites are located in a belt of high pH soils with high concentrations of calcium and magnesium. A robust perennial sedge, the stems are 4-6 decimeters (dm) tall (usually 1.5 times longer than the leaves). It blooms in May and June and is distinguished from other Carex species by its long awns, blue-green leaf blades, and brown to white basal sheaths (Nature Serve, 2002). NHP has no records of Radford's sedge within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.43. Tall Larkspur (Delphinium exaltatum). North Carolina Endangered and Special Concern, Federal Species of Concern. This distinctive perennial wildflower of the buttercup family has altemate, palmately -cleft leaves, a smooth stem, a hard rootstock, and grows up to two meters tall. The flowers are produced from July to September and have spurred sepals and petals. It grows on grassy balds, glades, and in open woodlands, usually over mafic rock. NHP has no records of tall larkspur within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.44. Swamp Pink (Helonias bullata). North Carolina Threatened and Special Concern, Federal Threatened. Swamp pink's 30 to 50 pink flowers bloom from March to May on racemous scapes. Its leaves are evergreen, lance -shaped, parallel -veined, and form basal rosettes. This lily is usually 20 to 90 centimeters tall during flowering, and up to 1.5 meters during seed maturation. Reproduction is usually asexual and dense colonial root sprouts are common. Swamp pink is shade tolerant and occurs in a variety of wetland habitats. It requires saturated but not flooded soils and is commonly associated with evergreen trees. NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in wetlands in the Highlands service area. A.45. Goldenseal (Hydrastis canadensis). North Carolina Endangered and Special Concern. Goldenseal's single yellow flower is bome between two terminal leaves in April. A third leaf is present at the base of a stem that arises from a knotty, yellow rhizome collected for folk medicine use. The one- or two -seed crimson fruits are borne from May to June. Goldenseal thrives in rich woodlands. NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.46. Small Whorled Pogonia (Isotria medeoloides). North Carolina Endangered, Federal Threatened. Small whorled pogonia's one or two yellow -green flowers appear between mid -May and mid -June, and only persist a few days. The flowers are borne terminally on the stem, and produce several thousand tiny seeds. Small -whorled pogonia grows in open, dry to mesic, deciduous woods with acidic soil. Dense surrounding scrub inhibits flowering, and some populations may remain dormant for a few years before sprouting and blooming. NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.47. Fraser's Loosestrife (Lysimachia fraseri). North Carolina Endangered, Federal Species of Concern. The purple -margined flowers of Fraser's loosestrife appear in June on leafy panicles. The lanceolate, glandular leaves are born in whorls of three to five on the stem. Fraser's loosestrife grows along moist roadsides and in alluvial meadows in the southwest mountains of North Carolina (Amoroso, 1999; Radford et al., 1968). NHP has records of three extant, .one historic, and one destroyed population within 1.5 miles of the service area. The plant was observed above Whiteside Cove during June 1993 and above Horse Cove and near Granite City during June 1997. Other unknown populations of this plant may exist in open -canopy moist to wet areas in the service area. A.48. Divided -leaf Ragwort (Senecio millefolium). North Carolina Threatened, Federal Species of Concern. The numerous yellow disk flowers of divided -leaf ragwort appear from late April through early June. The leaves are mostly basal and finely bipinnately to tripinnately dissected. It grows on or near rock outcrops (Radford et al., 1968). NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.49. Prairie Dropseed (Sporobolus heterolepis). North Carolina Endangered. Prairie dropseed is a cespitose perennial that grows in pine barrens over olivine rock (Amoroso, 1999). These are mafic silicates high in magnesium and iron with basic pH. The leaves are basal, chlorotic green, and with cobweb -like hairs in the throat. Flowers appear from August to September. NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. A.50. Mottled Trillium (Trillium discolor). North Carolina Threatened. Mottled trillium is locally abundant in Jackson County on circumneutral to basic soils in rich coves of forested slopes (Amoroso, 1999). The stems are green with purple spots, the leaves are spotted in purple and Tight green, and the pale white to cream flowers bloom from late March to early May. NHP has no records within 1.5 miles of the service area or elsewhere on the Highlands USGS quadrangle. Unknown populations may occur in the Highlands service area. APPENDIX B. Agency Scoping Comments. North Carolina Department of Administration Michael F. Easley, Governor Gwynn T. Swinson, Secretary February 20, 2002 Mr. Ward Marotti Robert Goldstein & Associates, Inc. 8480 Garvey Drive Raleigh, NC 27616 Dear Mr. Marotti: Re: SCH File # 02-E-4300-0307; Scoping Town of Highlands - Wastewater Treatment Plant Expansion from 0.5 MGD to 1.5 MGD The above referenced environmental impact information has been reviewed through the State Clearinghouse under the provisions of the North Carolina Environmental Policy Act. Attached to this letter are comments made by agencies reviewing this document which identify issues to be addressed in the environmental review document. The appropriate document should be forwarded to the State Clearinghouse for compliance with State Environmental Policy Act. Should you have any questions, please do not hesitate to call me at 807-2425. Sincerely, ehe22, Attachments cc: Region A Todd Kennedy, DENR - Div. of Water Quality aom Ms. Chrys Baggett Environmental Policy Act Coordinator 116 West Jones Street Raleigh, North Carolina 27603-8003 Telephone 919-807-2425 An Equal Opportunity / Affirmative Action Employer NORTH CAROLINA STATE CLEARINGHOUSE DEPARTMENT OF ADMINISTRATION INTERGOVERNMENTAL REVIEW MS RENEE GLEDHILL-EARLEY CLEARINGHOUSE COORD DEPT OF CUL RESOURCES ARCHIVES -HISTORY BLDG - MSC 4617 RALEIGH NC REVIEW DISTRIBUTION DENR LEGISLATIVE AFFAIRS DEPT OF CUL RESOURCES SWNC PLANN & ECON DEV COMM STATE NUMBER: 02-E-4300-0307 DATE RECEIVED: 12/21/2001 AGENCY RESPONSE: 01/22/2002 REVIEW CLOSED: 01/27/2002 MT% DEC 27 2t01 gin i/ze�az HO HISTORIC PRESERVATION OFFICE PROJECT INFORMATION APPLI CANT: Robert Goldstein & Associates, Inc. (,p/�aaCk5eP'‘- TYPE: State Environmental Policy Act ERD: Scoping DESC: Town of Highlands - Wastewater Treatment Plant Expansion from 0.5 MGD to 1.5 MGD The attached project has been submitted to the N. C. State Clearinghouse for intergovernmental review. Please review and submit your response by the above indicated date. If additional review time is needed, please contact this office at (919)807-2425. AS A RESULT OF THIS REVIEW THE FOLLOWING IS SUBMITTED: NO COMMENT 0 COMMENTS ATTACHED SIGNED BY: DATE: tUSLQ-Ecazid c)/ 4/OR RECEiVED FEB " 2002 . STArE CLEARINGHQu 'JAN 1 0 2001 Ardi NCDENR North Carolina Department of Environment and Natural Resources Michael F. Easley, Govemor William G. Ross Jr., Secretary MEMORANDUM TO: FROM: RE: DATE: Chrys Haggett State Clearinghouse Melba McGee Project Review Coordinator 02-0307 Scoping for Town of Highlands WWTP Expansion, Macon County February 20, 2002 The Department of Environment and Natural Resources has reviewed the proposed project. The attached comments are a result of this review. - More specific comments will be provided during the environmental review process. Thank you for the opportunity to respond. If during the preparation of the environmental document, additional information is needed, the applicant is encouraged to notify our respective divisions. Attachments RECEIVED FEB 20 20621 cSTAGE CLEARINGHOUSE 1601 Mail Service Center, Raleigh, North Carolina 27699-1601 Phone: 919-733-49841 FAX: 919-715-30601 Internet: www.enr.state.nc.us/ENR n.. Grni71 nnnnrit mitts \ Affirmativa Ar.tinn Fmnlnver - 50% Recycled 1 10% Post Consumer Paper Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources ✓ Gregory J. Thorpe, Ph.D. ._� Acting Director Division of Water Quality February 13, 2002 MEMORANDUM TO: Melba McGee Department of Environment and Natural Resources FROM: J. Todd Kennedy1' Division of Water Quality SUBJECT: Review of Scoping Letter for Town of Highlands WWTP Expansion, Macon County, DENR #02E-0307 The Division of Water Quality (Division) has reviewed the above referenced document. The Town of Highlands proposes to expand its wastewater treatment plant from a capacity of 0.5 MGD to 1.5 MGD. The Division will be the lead agency in coordinating preparation of the Environmental Assessment (EA) for this project under the NC Environmental Policy Act. Pursuant to 15A NCAC 01C.0404, the Division is responsible for the scope, objectivity, content and accuracy of the environmental document. A full review of alternatives to WWTP discharge expansion will be required. The EA should discuss the existing system and need for the expansion. Flow must be justified in accordance with 15A NCAC 02H.0219, Minimum Design Requirements (http://h2o.enr.state.nc.us/admin/rules/2H.0200.pdf). The Division's guidance for preparing the Engineering Alternatives Analysis is attached. In order to properly consider alternatives, limits or conditions to direct discharge must be known. The applicant must submit a speculative waste limits request to the Division prior to submittal of the EA. The Division's response must be attached to the EA as an appendix. Contact Dave Goodrich with the Division's NPDES Unit for more information at 919.733-5083 x517. The NC Department of Administration's guidelines for EA preparation should be followed. In addition, the Division requests that the following specific areas be addressed: • Identify all streams impacted by the project including their current classification, use support ratings and water quality; • Discuss land use, population, zoning, development density, local land use ordinances and water bodies within the project service area; • Describe all changes in land use that will be induced by the project as well as associated impacts such as increased stormwater runoff from residential and commercial development; and • Explain how the project may affect water quality in both the Cullasaja River upstream of Lake Sequoyah and Mill Creek, waters classified as impaired by the Division. Discussions should cover all direct, indirect and cumulative impacts on resources in proportion to their significance as well as proposed mitigation to avoid significant impacts. Additional guidance regarding SEPA document preparation for Division projects can be found at http://h2o.enr.state.nc.us/sepa/index.htm. N C. Division of Water Quality 1617 Mail Service Center Raleigh. NC 27699-1617 (919) 733.7015 NCDEi'. Customer Servic E 1 800 623.774 e 'Town of Highlands W W'1Y hxpanston Scoping Letter Page 2 Once a draft EA has been completed by the applicant, one copy of the document should be submitted directly to the Division for an initial review. The Division will review the document for format, clarity, topic and resource coverage, and reasonable conclusions. This completeness review generally takes a minimum of two weeks and may result in the document being returned to the applicant for necessary revisions. Next, the document is reviewed by relevant agencies within the Department of Environment and Natural Resources (DENR). Any issues identified during this review will need to be resolved, and the EA will need to be amended to address the issues before DENR will support further Clearinghouse review and give project approval under SEPA. If impacts cannot be reduced or mitigated to a level of insignificance, an EIS (Environmental Impact Statement) will be required. Finally, the Division encourages the town to engage the public early in the EA process. I may be contacted at 919.733.5083 x555. Thank you for the opportunity to comment on this project. Attachment DWQ# 12992 NC DENR / Division of Water Quality / NPDES Unit ENGINEERING ALTERNATIVES ANALYSIS (EAA) Guidance Document t is the Division's mandate to assure the most environmentally sound alternative be selected from all reasonably cost- effective options. Prior to the issuance of an NPDES discharge permit, complete justification for the discharge must be made through a comprehensive Engineering Alternatives Analysis (EAA). The NPDES permit program was developed as a result of the Clean Water Act of 1972. The original goal of the program (as outlined in the Act) was the elimination of all surface water point source discharges by 1985. Although we have not achieved this goal, we continue to strive toward it. In that light,, the completion of an EAA is A ement of an diividual or organization appl ng for a new or anding NPDES disch '(Title 15A NCAC 2H.0105 (c) (2)). The purpose of this document is to provide guidance to the regulated community for the evaluation of wastewater disposal alternatives. The following outline should be used in the preparation of EA►As. In the past, the environmental feasibility and economic feasibility of a particular disposal option have been segregated. These should not be treated as mutually exclusive analyses. They are dependent on one another. When evaluating any of the alternatives discussed below, both environmental and economic feasibility should be addressed. The following is an outline to be used in preparing an EAA. If any EAA submitted lacks any of these basic pieces of information, it will be returned as incomplete. I. General Information A. Basicidentification of the Project • Facility name • County • Facility address • Facility telephone number • EAA preparer's name, mailing address and telephone number B. Provide a detailed description of the project's wastewater disposal needs. All wastewater flows associated with this project should be calculated in accordance with 15A NCAC 2H .0219. Justification and demonstration of need should be provided for expected flow volumes including any flow reductions realized through use of flow restricting devices. For all alternatives, the use of flow -restricting or low -flow devices should be investigated. A report of the findings should include flow reduction projections. C. If existing facilities will be used as part of an expansion, discuss those existing units induding present and past performance, unit capacities and inadequacies and provide a schematic with component sizes. D. Indicate if the project will be constructed in phases. Provide the estimated wasteflow per phase. Indicate current phase status for existing facilities and provide a schedule for construction of each additional phase. II. gvaluation of Disposal Alternatives The Engineering Alternatives Analysis should include an evaluation of any and all disposal alternatives. The analysis should address all of the following options: • Connection to a Publicly Owned Treatment Works (POTW) • Connection to a privately owned treatment works • Individual subsurface systems • Community subsurface systems • Drip irrigation - both surface & subsurface • Spray irrigation • Reuse • Surface water discharge through the NPDES program • Any possible combination of the above options Engineering Alternatives Analysis: April 5. 2001 Page 1of4 NC DENR / Division of Water Quality / NPDES Unit ENGINEERING ALTERNATIVES ANALYSIS (EAA) Guidance Document A. Connection to a Sewer Collection System (served by a municipality or other entity holding a valid NPDES Non -Discharge Permit). 1. Existing Sewerage System: Indicate the distance to an existing sewer line within a five -mile radius (extension of radius should be considered if cost effective for project size). *NOTE: All connection options should include an evaluation of both a gravity line as well as a force main with pump station(s). (a) Provide a description of sewer facilities and resources necessary to connect to the receiving wastewater treatment plant (b) Provide a preliminary indication of flow acceptance from municipal or private WWTPs under consideration for connection. If a municipal or private WWI'P cannot accept the wastewater, please explain. (c) Attach a topographic map or a site drawing showing the physical route of this alternative. (d) Perform a Present Value of Costs Analysis for this alternative as outlined in Appendix A of this document. Investigate cost -sharing options with other potential users. 2. Planned Sewerage System: Determine if an area wide sewerage system within a five mile radius is projected to be available within the next five years to receive waste from the project under study. Determine availability date and flow acceptance projection with appropriate authority. Identify your contact in the public utility or private management group that assisted you in this determination. B. Land Based Disposal (Installation of nitrification systems, low pressure pipe systems, drip irrigation, mound systems, and spray irrigation systems). 1. Determine if the applicant currently owns land that is available and suitable for a subsurface system. (a) Provide a description of the facilities and resources necessary including a site plan indicating the proposed layout. (b) Provide a soil analysis that includes the information outlined in Appendix B of this document (c) Provide calculations to determine the disposal capacity of the applicant's available land, based on design and loading rate characteristics as well as appropriate regulations. (d) Describe what modifications to the plan (such as reducing the number of units produced,- the reduction of design flow, etc.) would be necessary to allow for adequate disposal using usable land on the site. .This step should be performed if there is insufficient usable land, considering the existing project development plan. If there is not sufficient usable land, explain why not. (e) Perform a Present Value of Costs Analysis for this alternative as outlined in Appendix A of this document 2. If there is insufficient land on the project site, determine if any additional land could be acquired. Provide documentation of availability. If adjacent land could be acquired, evaluate according to item B (1). If adjacent land is unavailable, provide documentation from the owner stating such. NOTE: Subsurface disposal systems require a 100% reserve area. Surface disposal systems must be capable of treatment to secondary limits including disinfection. • C. Wastewater Reuse Evaluate reusing all or a portion of the wastewater generated on -site. D. Surface Water Discharge (a discharge to a flowing stream - defined as having positive 7Q10 and 30Q2 flows). 1. USGS should be consulted for obtaining receiving stream flow information. This information should be provided in conjunction with treatment plant design. For flow information contact Mr. Curtis Weaver at (919) 571-4043. 2. All discharging systems should be evaluated both with and without tertiary filtration assuming a weekly sampling regime. 3. Provide a description of the proposed discharge facilities, including a schematic diagram of the major components and a site plan of the treatment facility with outfall line(s). All discharge systems must meet design criteria outlined in the Division's "Authorization to Construct Process." 4. Provide documentation of the availability of required land and/or easement agreements. 5. Perform a Present Value of Costs Analysis for this alternative in accordance with Appendix A of this document. Engineering Alternatives Analysis: April 5, 2001 Page 2 of 4 1.2 d� 0 E. Disposal Combinations: The EAA should evaluate the feasibility of a combination of any of the above disposal alternatives in lieu of a surface water discharge. NC DENR / Division of Water Quality / NPDES Unit ENGINEERING ALTERNATIVES ANALYSIS (EAA) Guidance Document Appendix A Present Value of Costs The Present Value of Costs Analysis (PVCA) is meant to evaluate. all costs . associated with a particular disposal alternative over the life of the project. • Prior to performing a PVCA for any of the alternatives, all costs must be identified The PVCA should include all monetary costs associated with construction, startup and operation of a facility. Costs should include, but not be limited to, the following. Capital Costs • Land acquisition costs • Equipment costs • Labor costs • Installation costs • Design costs Recurring Costs ■ Operation and maintenance costs (with replacement costs) ■ Laboratory costs assuming a weekly monitoring regime for discharge. systems and a. monthly regime for non - discharge systems • Operator and support staff costs ■ .. Residual disposal costs • . Connection and subsequent user fees • : Permit and compliance fees • Utility costs (power, water, etc.) Opportunity Costs NOTE: All cost information provided must be referenced. If vender quotes have been received for treatment units or other components, thcy shall be included as well. Present Value of Costs Costs incurred in different time periods must be converted to a common time period before they can be accurately combined or compared. Performing this calculation is known as "computing the'present value," or "discounting" the costs. Present value is also sometimes called "present discounted value" or "present worth". The following standard formula for computing the present value must be used in all cost estimates made under this evaluation guidance: Where: PV=C +t= ° , (1+rY PV = Present value of costs. Co = Costs incurred in the present year. Ct = Costs incurred in time t. t = Time period after the present year ( The present year is t = 0) n = Ending year of the life of the facility. r = Discount rate. For these calculations, an interest rate quoted by the lending institution should be used. The interest rate quote should be provided with this analysis. Engineering Alternatives Annlusis: Agri! 5. 2001 NC DENR / Division of Water Q.:I:stir. ENGINEERING ALTERNATIVES ANALYSI However, if the costs are the same in every time period from year one thro 1,2,..., n), then the formula reduces to: PV=Co+C (1 + r)" —1 l r(1+r)" J In this case, the present value may also be looked up in a table containing the present value of auniu. _.;, ,,. constant amount payable in each year for a certain number of years). Such tables are available.: .o institutions. Appendix B Soil Analysis Report Requirements For all new facilities The EAA must include a detailed soil analysis report including, but not be limited to, the following: • A copy of field notes and boring log information • A soils site map overlain on a topographic map (county soil maps may be used for delineating boring locations only, not for soil characterization). • Soil characterization in terms of texture, structure, permeability, wetness and mineralogy • Soil characterization to a depth of 48" or to a restrictive horizon • Soil loading rate recommendations and land area requirements The report should address the applicability of any surface or subsurface disposal alternative. For existing facilities proposing an expansion The EAA must include a detailed soil analysis report including, but not be limited to, the following: ■ County soil maps used to identify on -site soils. • Best -case loading rates using these soil characterizations. • PVCA (see above). If the present value for a non -discharge alternative is less than for a discharge system, provide a more detailed soil analysis report including the following: • A copy of field notes and boring log information • A soils site map overlain on a topographic map (county soil maps may be used for delineating boring locations only, not for soil characterization). • Soil characterization in terms of texture, structure, permeability, wetness and mineralogy • Soil characterization to a depth of 48" or to a restrictive horizon ■ Soil loading rate recommendations and land area requirements Engineering Alternatives Analysis: April 5. 2001 Page 4 of 4 North Carolina Wildlife Resources Commission 512 N. Salisbury Street, Raleigh, North Carolina 27604-1188, 919-733-3391 Charles R. Fullwood, Executive Director MEMORANDUM TO: Melba McGee, Environmental Coordinator Office of Legislativ d Int e ental airs FROM: Owen F. Anderson, ntReg ion Coordinator u Habitat Conservation Program DATE: February 11, 2002 SUBJECT: Scoping for Town of Highlands WWTP, Macon County, North Carolina, DENR No. 02E-0307 Biologists with the.North Carolina Wildlife Resources Commission (NCWRC) have reviewed the subject document. These comments are provided in accordance with certain provisions of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661 et seq.), the North Carolina Statutes (G.S. 113-131 et seq.), and the National Environmental Policy Act (42 U.S.C. 4332(2)(c)). The Town of Highlands proposes to expand the wastewater treatment plant to serve the Town of Highlands and five annexation areas. The expansion will triple treatment capacity from 0.5 to 1.5 million gallons per day. There is no reference to expansion of the collection systems; however, the scoping letter refers to an annexation area. There are significant aquatic and terrestrial resources within the affected area of this project. Most of the affected area appears to be in the Cullasaja River watershed but some impacts may occur within the Chattooga River drainage. Both of these streams support significant aquatic resources. In the Highlands area, many of the streams within these two basins are either classified by the Division of Water Quality as trout waters or are designated trout - waters by the NCWRC. Additionally, Big Creek, Lake Sequoyah and a portion of Mirror Lake are classified as WS-III tr HQW. Additionally, the streams in the area provide significant recreational opportunities. The North Carolina Natural Heritage Program identifies a number of natural heritage elements for the Highlands area. These elements are both on public and private lands and include plants, animals and community types. For example, there is a Southern Appalachian bog near one annexation area. And a record for a bog turtle (Clemmys mulenbergii) in the vicinity of Town of Highlands WWTP 2 Macon County, Cullasaja & Chattooga Rivers February 11, 20o this annexation area in a different location than the bog. Bogs provide important habitat for fish and wildlife other than the State and federally threatened bog turtle. Since this project could adversely impact a federally threatened species, we request that the project sponsors or their consultants consult early in the project with the U.S. Fish and Wildlife Service. The Service can be contacted in Asheville at (828) 258-3939. We believe this project has the potential to have significant adverse impacts to fish and wildlife resources, including listed species. The impacts could result from additional effluent and associated pollutants, extension of sewer lines and crossings; however, the greater concern is the secondary and cumulative impacts associated with a significant increase in infrastructure. Direct impacts of concern primarily relate to discharge of additional effluent, malfunctioning pump stations and treatment plant and discharge of toxic substances (e.g., chlorine). We request that expanding wastewater treatment plants be equipped with a non -toxic disinfecting method such as ultraviolet light. Additionally, we request that all pump stations and the WWTP be equipped with standby emergency generators of sufficient size to maintain the critical parts of the conveyance and treatment works during power outages. We do not consider dual feed- power to constitute an emergency power supply. The increased infrastructure is likely to lead to growth in an already rapidly growing area. An increase in impervious surfaces, filling of floodplains, loss of wetlands, fragmentation of habitat and loss of forested riparian buffers are impacts typically associated with expanding water or sewer infrastructure. Gravity sewer lines can have significant adverse impacts on streams if their installation results in disturbances and canopy removal in close proximity to the stream. Therefore, locating gravity sewers and pump stations as far away from streams as possible is extremely important. Sediment is a major water pollutant and tends to increase with growth and development of an area and is a major concern already in the Highlands area. Golf course developments are particularly environmentally offensive and are of special concern. The information provided is not sufficient for our staff to make definitive recommendations or conclusions concerning this project. Due to staff limitations, this standardized response was developed for projects such as this. Although some of the information, requests and comments may not be applicable to certain projects, these guidelines should facilitate preparation of fish and wildlife impact assessments. This information will be very useful if it becomes necessary to prepare an environmental document. In addition to addressing the concerns discussed above, the environmental document should include a detailed assessment of existing natural resources within these areas of potential development and should discuss the potential of mitigating development impacts to wetlands, surface waters and high -quality upland habitat. Additionally, to provide a meaningful review of proposed project impacts on fish and wildlife resources, we request that consultants, project sponsors or permit applicants provide the following information in the environmental document. 1. Include descriptions of fish and wildlife resources within the project area, and a listing of federally or state designated threatened, endangered or special concern species. When 9.. ..� erb Gi 9.‘,�, of Highlands WWTP 3 acon County, Cullasaja & Chattooga Rivers February 11, 2002 practicable, potential borrow or disposal areas to be used for project construction should be included in the inventories. A listing of designated species can be developed through consultation with: The Natural Heritage Program, NC Division of Parks and Recreation, 1615 Mail Service Center Raleigh NC 27699-1615, PH: (919) 733-4181. 2. Include descriptions of any streams or wetlands affected by the project. • 3. Include project maps identifying wetland areas. Identification of wetlands may be accomplished through coordination with the U.S.. Army Corps of Engineers (COE). If the COE is not consulted, the person delineating wetlands should be identified and criteria listed. 4. Provide a description of project activities that will occur within wetlands, such as fill or channel alteration. Acreage of wetlands impacted by alternative project designs should be listed. 5. Provide a description and a cover type map showing acreage of upland wildlife habitat impacted by the project. 6. Discuss the extent to which the project will result in loss, degradation or fragmentation of wildlife habitat (wetlands and uplands). 7. Discuss any measures proposed to avoid or reduce impacts of the project or to mitigate unavoidable habitat losses. 8. Discuss the secondary and cumulative impacts associated with the proposed project. Such discussion should weigh the economic benefits of such growth against the costs of associated environmental degradation. (a) Include specific measures that will be used to manage stormwater runoff. Include specific requirements for residential, commercial and industrial developments and BMPs that will be required. (b) Include specific measures that will be used to protect stream corridors, riparian habitat and a minimum of the 100-year floodplain from filling and development. . Commitments by the project sponsors to protect area streams with riparian buffers through purchase or conservation easement are of particular interest. (c) Include specific measures that will help mitigate the impacts to fish and wildlife of the region and help maintain the functions of the Cullasaja and Chattooga drainages. 9. Include a list of document preparers that shows each individual's professional background and qualifications. Measures to avoid or minimize impacts to sensitive resources, including wetlands, should be implemented during construction. Where impacts to wetlands are unavoidable, we will Town of Highlands WWTP 4 Macon County, Cullasaja & Chattooga Rivers February 11, 2002 recommend mitigation of the losses. In addition to providing wildlife habitat, wetland areas perform important functions of flood control and water quality protection. To avoid or minimize wetland impacts, we offer several generalized recommendations. Utility lines should be placed in or adjacent to upland areas. It is recommended that a minimum 100-foot buffer of forested vegetation be left between construction corridors and the banks of larger perennial streams. These buffers will help minimize impacts to water quality, stabilize streambanks and provide travel corridors. for wildlife. Native trees and shrubs should be retained or established in the buffers. Forested buffers should also be left along intermittent drains or streams. The U.S. Army Corps of Engineers (COE) recognizes Macon County as a trout county and most of the streams in the project area do support trout. Therefore, the NCWRC will review any COE permits associated with the project and recommend conditions to the permit to protect aquatic species. In -water work moratoriums to protect trout and/or endangered species will likely be requested. Thank you for the opportunity to provide input in the early planning stages for this project. If we can be of further assistance, please contact our office at (828) 452-2546. cc: Steve Hall, Zoologist, Natural Heritage Program Brian Cole, Biologist, USFWS Asheville AT;Til NCDENR North Carolina Department of Environment and Natural Resources Division of Parks and Recreation Michael F. Easley, Governor William G. Ross, Jr., Secretary Dr. Philip K. McKnelly, Director January 22, 2002 MEMORANDUM TO: Melba McGee FROM: - Stephen Hall c SUBJECT: Scoping — Wastewater Treatment Plant Expansion, Highlands REFERENCE: 02E-0307 The Natural Heritage Program database contains records for several rare plants and animals from the Cullasaja River and its near vicinity downstream from the Highlands WWTP. Also located downstream is the Cullasaj a Gorge Registered Natural Area and the highly significant botanical site at Dry Falls. We strongly recommend that direct impacts to these resources be considered, including the effects of sedimentation, increased pollutant discharge, and changes in flow regime. Additionally, since the proposed project may allow additional growth within the Highlands area, we recommend that secondary and cumulative impacts be considered relative to the large number rare species and natural areas that are located throughout the service area of the WWTP. 1615 Mail Service Center, Raleigh, North Carolina 27699-1615 T- n,n -rIc )CQ \ T t y-,Ar• ujww nrcnarkc net • DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENVIRONMENTAL HEALTH Inter -Agency Project Review Response Project Name ra • Project Number 4.107 County Type of Project The applicant should be advised that plans and specifications or all water system improvements must be approved by the Division of Environmental Health prior to the award of a contract or the initiation of construction (as required by 15A NCAC 18C .0300et. seq.). For information, contact the Public Water Supply Section, (919) 733-2321. ❑ This project will be classified as a non -community public water supply and must comply with state and federal drinking water monitoring requirements. Formore information -the applicant should contact the Public Water Supply Section, (919) 733-2321. ❑ If this project is constructed as proposed, we will recommend closure of ___ feet of adjacent waters to the harvest of shellfish. For Information regarding the shellfish sanitation program, the applicant should contact the Shellfish Sanitation Section at (252) 726-6827. - • ❑ The soil disposal area(s) proposed for this project may produce a mosquito breeding problem. For information concerning appropriate mosquito control measures, the applicant should contact the•Public Health Pest Management Section at (252) 726-8970. ❑ The applicant should be advised that prior to the removal or demolition of dilapidated structures, a extensive rodent control program may be necessary in order to prevent the migration of the rodents to adjacent areas. For information concerning rodent control, contact the local health department or the Public Health Pest Management Section at (919) 733-6407. ❑ The applicant should be advised to contact the local health department regarding their requirements for septic tank installations (as required under 15A NCAC 18A. 1900 et. sep.). For information concerning septic tank and other on -site waste disposal methods, contact the On -Site Wastewater Section at (919) 733-2895. ❑ The applicant should be advised to contact the local health department regarding the sanitary facilities required for thisproject. if existing water lines will be relocated during the construction, plans for the water line relocation must be submitted to the Division of Environmental Health, Public Water Supply Section, Technical Services Branch, 1634 Mail Service Center, Raleigh, North Carolina 27699-1634, (919) 733-2321. ❑ For Regional and Central Office comments, see the reverse side of this form. me,14a, Reviewer Section/Branch Date a • lY ucr/-1r1 I Ivicii I lJr clv v ff"tVIVlvlciv I I-\Iyu NATURAL RESOURCES DIVISION OF ENVIRONMENTAL HEALTH Inter -Agency Project Review Response 1 Project Name vT ���J Type of Project i/ Comments/44,,- provided by: ❑ Regional Program Person .g Regional Engineer for Public Water Supply Section ❑ Central Office program person Name: Telephone number. Program within Division of Environmental Health: Public Water Supply ❑ Other. Name of Program: Response (check all applicable): ❑ No objection to project as proposed ❑ No comment ❑ Insufficient information to complete review ❑ Comments attached ❑ See comments below Project Number D Z£ -d,�a GtI TP fo vfi�•,. ›4› e*K Date: 0 6 “. a/1 -115 J � � J AiNcOn S 6 e.101.0 L 4 KL ✓o� 7 L7 ,S f-A-1174J1 WI 7-r51,ti-rC . ice. Me.M.-1 5 lo,t S S G1 i3 cL '- G. c.J t ti 5 cf i )C 4S 1Ct, v 4M. Retum to: Public Water Supply Section - 7 Environmental Review Coordinator for the Division of Environmental Health Memorandum 11 March 2002 To: Joe Corporon From: Andrea Leslie, Watershed Assessment and Restoration Project cc: Callie Dobson, Little Tennessee River Basin Planner Subject: 7Q10 in the Upper Cullasaja River There has been much public concern about the potential water quality impacts of Highlands' wastewater treatment plant, which has been on the Cullasaja River since 1994. The Division of Water Quality used equations and assumptions developed by USGS (Giese and Mason, 1991) to estimate 7Q10 flows to permit this wastewater treatment plant. Highlands is currently preparing to expand their wastewater treatment plant. When this permit request is processed through the Division of Water Quality, it will be important to use a 7Q10 that reflects the hydrology and land use of the Highlands Plateau. I understand that the 7Q10 estimations from the USGS document are intended to approximate low flows in non -urban and unimpounded streams. The Cullasaja River and its tributaries are dammed numerous times above Highlands' wastewater treatment plant, and Highlands is a sprawling developed area. Evaporation from impoundments, withdrawals of water by numerous golf courses, and impervious surface all reduce the amount of baseflow in the Cullasaja River. It is important that the Division of Water Quality factors these components into its 7Q10 estimation for the Cullasaja River. Giese, G.L. and R.R. Mason. 1991. Lowflow characteristics of streams in North Carolina. USGS Open -File Report 90-399. Raleigh, NC. APPENDIX C. Public Scoping Comments, Public Meeting Minutes, and Affidavit of Publication. PUBLIC HEARING of January 30, 2002, with Mayor Buck Trott and Commissioners H. N. James, Ron Sanders, Amy Patterson, Mike Cavender, and Hank Ross present. Also present were Richard Betz, Lamar Nix, Kurt Wright, Bob Goldstein, Ward Maroti, Kim Lewicki, Don Hendershot, Buzz Williams, Pat Boyd, Henrietta Norman, Clement Patton, Peg Jones, Jody & Carolyn Cook, Gerry Doubleday, Bob Wright, Peter Lintz, Edna Foster, Lee Byers, Katie Chenoweth, Jeremy Dooley, Robert Wyatt, Bill McLarney, Jim Graham, Shirley Johnson, and Jack Bornemann. The Mayor called the Public Hearing to order at 7:00 p.m. He explained that the purpose was to hear a presentation from the Town's consulting engineer and environmental scientist, and to answer questions and receive comments from the public, on the Town's proposed expansion of the capacity of its existing 0.5 million gallons per day (MGD) Wastewater Treatment Plant (NPDES Permit No. NC0021407) to 1.5 MGD. The public hearing had been duly advertized for this time and place. Each Board member had received copies of a Preliminary Engineering Report dated January 21, 2002, prepared by W. K. Dickson Company Inc., and copies were also available for the public. Several maps and plans from the report were displayed in the hearing room. The Mayor then introduced Kurt Wright, P. E., from W. K. Dickson Co., and Bob Goldstein and Ward Maroti of Robert J. Goldstein & Associates. Kurt Wright proceeded to present an overview of the project, including the basic design of the existing Sequential Batch Reactor (SBR) facility, constructed in 1994 and permitted in 1999; the NPDES permit was scheduled to expire October 31, 2002, and the permit application would need to be submitted 180 days prior to that date. Because of the expectation of increased effluent limits, a decision had been made to go to tertiary treatment; although the effluent limits had still not been released by the Department of Environment and Natural Resources (DENR), it was likely that the tertiary treatment would meet those standards. He then reviewed the combination of 20year population projections and existing flow records used in the report, which indicated an average design flow for the period of 1.5 MGD. Four alternatives had been explored: Option 1, Expanding the plant, with 100% surface water discharge of effluent; Option 2, spray irrigation of treatment plant effluent; Option 3, connecting to the Franklin or Cashiers systems; or Option 4, reusing the effluent at area golf courses. Option 1 was the most costeffective option. Bob Goldstein then introduced himself and his firm, which had specialized in environmental documents since 1985, and briefly described the requirements under the State Environmental Policy Act, which required preparation of an environmental document when public funds were spent. He said that the Environmental Assessment (EA) was a formal document that would be reviewed by several state agencies, with the hope that all of the agencies would eventually agree to a Finding of No Significant Impact. The EA was now in its scoping phase, with comments from the agencies due by February 15; those comments and recommendations would be incorporated into the EA. The EA would also address the environmental setting, the need for the expansion, disposal of effluent, and other environmental concerns. By trying to anticipate all possible recommendations and alternatives, it was expected that the process could be accelerated, and also that all of the issues could be addressed and damages avoided far more effectively than through an Environmental Impact Statement (EIS). He also said that one of the key components of the EA would be an analysis of what the Town was doing to control growth and mitigate the effects of growth through its land use program. Ward Maroti reported that most of the work was complete, and that the completed draft would be ready in a matter of weeks. Kurt Wright then reviewed in more detail the treatment process in the proposed project, which would include two new SBR tanks, new filters, and ultraviolet treatment, with chlorine as a backup. Bob Goldstein commented that the quality of water with tertiary treatment would be pretty close to potable. Mr. Wright then fielded several questions on the presentation. Gerry Doubleday asked about the flow in the Cullasaja River. Mr. Wright explained that the effluent limits would be based on the low flow, or "7Q10" in the river; when in full operation, he expected the plant would discharge no more than one tenth the flow in the river under driest conditions. Jim Graham asked about the quality of water in the river, and Mr. Wright explained that it would not have any adverse effects. Buzz Williams asked about the effects of stormwater, and Mr. Wright explained that due to an aggressive inflow and infiltration program, the Town had eliminated this problem. The Mayor then invited each of the five persons who had signed up to speak to be heard. Buzz Williams, representing the JacksonMacon Conservation Alliance, commented that he had yet to see a sewage treatment facility that worked properly. He was concerned about the possibility of lowering water quality in the Cullasaja River, which he felt should be an outstanding resource water, not just a BTrout river. He asked the Board to consider endorsing the State's Natural and Scenic Rivers designation anfor ehe river emont recognize and protect it, and he felt that such would not hamper the expansion of the Plant. Peg Jones asked William McLarney, who had not signed up, to speak before she did. Dr. McLarney said that, although he had not planned to speak, he would make some comments on behalf of the Little Tennessee Watershed Association. He said that while he agreed a dose of skepticism was in order, he was impressed by the project; he had always felt that tertiary treatment was a good idea. He also said that he was concerned about water quality in the area between Lake Sequoyah and Dry Falls. But he felt that basically the project was a good start in the right direction. Peg Jones, representing Save Our Rivers Inc., thanked the Board for going through this process. She said she had come with a prepared statement, but was not going to read it; she felt that the tertiary treatment would be effective in cleaning up the river. She also expressed some concerns over the increasing growth in Highlands, and reiterated Mr. Williams's earlier request for endorsement of the Wild & Scenic River designation. She commented that this permit process was being closely watched, but thanked the Board for its courtesy in holding the hearing. Jodie Cook, representing the Upper Cullasaja Watershed Association, also commented that tertiary treatment was an excellent choice, as was the SBR design. He was pleased to see this technology in use. Peter Kintz, representing the JacksonMacon Conservation Alliance, noted that the Cullasaja River and some of its tributaries above Lake Sequoyah were listed as impaired. He was impressed by the presentation, however. He asked when DENR's effluent limits would be released. Mr. Wright said he understood they would be available soon, and the information would be available to the public. Bob Wright, representing the Upper Cullasaja Watershed Association, thanked the engineers for the professional presentation. He wondered about the NPDES permits in the entire river basin being due at the same time and the effect that might have. He also pointed out that most of the studies of water quality in the river had been based on microinvertebrate studies, but he was interested in water chemistry testing as well. He also felt detecting and handling upset conditions should be addressed. The Mayor thanked those present for their comments. He also pointed out that, just because the Town was planning to expand its plant, that did not indicate there was anything wrong with the Town's existing plant or operations. He said that it was continuing to meet all limits, sampling was conducted by independent contractors, and the facility employed the best operators in the business. He asked if there were any other comments. Buzz Williams commented that the NPDES reporting system relied on monthly averages, and daily spikes would not show up. He was also concerned that decisions would be made before DENR's effluent limits were released. Mr. Wright assured him that the effluent limits were due soon, and no decisions would be made before they were established. Dr. McLamey commented, in general, that he had detected a considerable increase in pollution in several of the tributaries to the river; anything that could be done that would protect the river would benefit everybody. There being no further comments from the public, the public hearing was declared adjourned by the Mayor at 8:20 p.m. Richard Betz, Town Clerk Affidavit of Publication Clipping of Legal Advertisement here :wip'J • hie d on 4,i ygip....11101.107. ►•k;oa3 gluerwaRrmuliFY r• • North Carolina -Macon County Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths personally appeared cticitoir) who being first duly sworn, deposes and says: that she /he is €mpk4Q cLU-41Yf?Qd (Owner, partner, publisher, or other employee authorized to make this affidavit) of The Highlander Newspaper, pub- lished, issued and entered as second class mail in the Town of highlands in said County and State; that she/he is au- thorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in The Highlander News- paper on the following dates: rkcsyrn ar) ;15 �in which such not apes and that the said newspaper , paper, , document or legal advertisement was published was, at the time of each and every such publication, a newspaper meeting all the requirements and qualifications of Section I-597 of the General Statutes of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statutes of North Carolina. r This (5 day of Q!)11)(1620 C»-- G.�UAL,. Signature of person making affidavit Sworn to and subscribed before me, this Rel day of !�)C)� erPp My Commission Expires Notary ublic My Commission Expires April 30, 2003 941mA/ asai{-n{_ , 9/Vale/vs/led Msso/ciatiart P.O. Box 1508 - Peggy Crosby Building 828-526-9938 x23 Highlands, NC 28741 February 12, 2002 To: The Town of Highlands W. K. Dickson & Co. Inc. From: The Upper Cullasaja Watershed Association, Inc. Subject: Comments to the Preliminary Engineering Report For the Town of Highlands Wastewater Treatment Plant Expansion, January 21, 2002 re: Environmental Assessment Scope The Upper Cullasaja Watershed Association, Inc., of Highlands, NC, is a non-profit, citizen -based organization dedicated to the analysis of water quality and water quantity issues in the 15 square mile watershed upstream of the Lake Sequoyah dam. Incorporated in 1999, UCWA has systematically approached water resource issues on the Highlands Plateau by developing partnerships and projects to improve scientific instrumentation and measurements to bring data -based observations and recommendations to the community to improve understanding and to support better decision processes. UCWA's achievements include the restoration of USGS streamgaging measurements in the Cullasaja River, expanded rainfall measurements in a network of instruments in the watershed, and cooperative development of a 5-year ground water study by the USGS and the State of NC, DENR. The State of North Carolina is currently in the process of publishing the 2002 update of The Little Tennessee River Basinwide Water Quality Management Plan. As stakeholders in the review process, UCWA references the following findings of the basinwide planning process which are relative to the Cullasaja River and germane to the NPDES permit renewal for the Highlands waste water treatment plant (WWTP). 1. The 4.8 miles of the Cullasaja River headwaters upstream of Mirror Lake Rd ( SR 1545) and 1.4 miles of Mill Creek from the source to Mirror Lake are classified by the State of NC as impaired waters. The source of impairment is nonpoint source pollution, principally sedimentation. These findings and classifications are based primarily on benthic macroinvertebrate studies and bioclassifications of these streams. 2. The Cullasaja River watershed was given special attention by Division of Water Quality biologists in 1999 (ed. following the latest NPDES discharge permit renewal). "Benthic macroinvertebrates were sampled at four mainstream river sites and seven tributaries. All Cullasaja River sites downstream of Highlands were Excellent DWQ biologists concluded that no substantial changes in water quality have been observed since the river was first sampled in 1990." UCWA believes that these results provide strong evidence that water quality in the Cullasaja River downstream of Lake Sequoyah has not been adversely impacted by the operations of the Highlands WWTP. Page 1 of 3 UCWA Comments to the Preliminary Engineering Report for the Town of Highlands WWTP Expansion 3. With respect to the Cullasaja River's aquatic life and recreation use support classifications, the basinwide plan states that the impaired streams above Mirror Lake are "Partially Supporting" and the Cullasaja River "from the dam at Lake Sequoyah to the Little Tennessee River" is "Fully Supporting". Big Creek is also "Fully Supporting". 4. With respect to the public water supply use support classifications, the Cullasaja River and Mill Creek upstream of Lake Sequoyah are "Fully Supporting". Missing from the State's data are water chemistry analyses of the Cullasaja River and Lake Sequoyah. DWQ staff are currently summarizing the findings of the Watershed Assessment and Restoration Project conducted in the watershed for the past 2 years. The report and DWQ's recommendations are to be published in March of 2002. Again, the emphasis has been on benthic macroinvertebrates sampling with some water chemistry correlations. All sampling sites, however, have been upstream of Lake Sequoyah. We know of no current water chemistry data for Lake Sequoyah or the Cullasaja River immediately downstream of the WWTP discharge point. Aquatic life and fish studies, however, continue to indicate that water quality downstream of Lake Sequoyah (particularly the river below the Cullasaja Falls on US 64) is Excellent. UCWA is pleased to learn that the Town and W.K. Dickson are providing tertiary waste water ,treatment processes and ultraviolet radiation treatment for the proposed expansion to further improve the water quality of the effluent discharged from the plant. Reviewing the Preliminary Engineering Report, we note that the effluent specifications are not presented. We request the water chemistry specifications for the treated effluent be defined in the report for the recommended process, regardless of the permit limits to be set by the State of North Carolina. Further, we believe that the public will be better informed by a direct comparison of the current SBR plant's effluent data (specifications and measurements) with the recommended expansion process specifications. Both a quantitative and qualitative analysis of this comparison should be discussed in layman's terms for the public. Additionally, UCWA recommends that the environmental assessment for the NPDES permit renewal application specifically test water chemistry parameters in Lake Sequoyah above the dam, in the effluent stream, and in the mixed flow regime downstream of the current WWTP discharge point. Scientific analysis and comparison of the water quality data from these three points can be used to inform the public about the true performance of the WWTP. The findings should also be related to water suitability for human contact ( recreation, swimming, etc.) in all three streams. These studies are recommended for both the current and the expanded plant discharge conditions. For example, should these analyses show that the quality of the discharge effluent is higher than that of the lake and river, it would be impossible to conclude that the WWTP is producing any negative effects in the river. Findings such as this would be consistent with DWQ's macroinvertebrate bioclassifications and the use support ratings downstream of the Lake Sequoyah dam. Page 2 of 3 UCWA Comments to the Preliminary Engineering Report for the Town of Highlands WWTP Expansion Finally, UCWA recommends that W. K. Dickson and its environmental consultant evaluate the technical feasibility and potential benefits of moving. the effluent discharge point from its current location to re -inject the tertiary -treated wastewater stream upstream of the Lake Sequoyah dam. This alternative has significant benefits with respect to demonstrating the Town's good faith efforts towards the public downstream of the plant. UCWA believes that with the improved water quality resulting from tertiary -treated waste water, reinsertion into Lake Sequoyah is both technically feasible and desirable as a demonstration of the Town's confidence in the operations of its wastewater treatment plant. If the discharge point is located relatively near the dam (say, within 100 yards) significant mixing and dilution can still be achieved prior to the water flowing over the dam to the river below. Any new public water supply intake pumping will be located further upstream in Lake Sequoyah; therefore, only a complete reversal of Cullasaja River flow could possibly result in any mixing of the diluted effluent stream with the intake. In addition to evaluating the alternative of moving the discharge point upstream into Lake Sequoyah, UCWA recommends that the W.K. Dickson include in this analysis an evaluation of any potential impact on the Lake Sequoyah's classification as a Public Water Supply Reservoir. UCWA believes that the additional studies and measurements recommended in these comments are essential to the public's understanding of the proposed expansion and the WWTP's relicensing. We appreciate this opportunity to include our comments in the ongoing process. cc• ' obert J. Goldstein & Associate Robert K. Wright, Vice President & Executive Director Upper Cullasaja Watershed Association, Inc. A 501 (c)(3) corporation Page 3 of 3 To Whom It My Concern: My name is Peg Jones. I serve as president of Save Our Rivers, Inc. We appreciate the town of Highlands conducting for the public this informational meeting regarding the proposed expansion of the town's sewage treatment plant from .5mgd to 1.5mgd, with discharge into the Cullasaja River, in the Nantahala National Forest. One question to be considered is, if the town wants to grow, : can it afford to do so without jeopardizing the existing water supply? The Upper Culasaja Watershed Association is to be commended for trying to educate the public on the supply of water on the Highlands Plateau. A pie can be cut into only so many pieces. Without water, even million dollar homes will be useless and have no value. The Clean Water Act, passed in 1972, under President Nixon, called for our nation's rivers to be swimmable and fishable by 1983. A major component of the CWA is the Antidegradation Policy, which does not allow any prior uses of a waterway to be taken away. The Cullaasaja River, listed on the Nationwide Rivers Inventory, has been known through the centuries for its being used for purification, baptisms, swimming, boating, its well - documented flora and fauna biodiversity, and its scenic and natural beauty. It has been nominated for state designation of Natural and Scenic, and federal Wild and Scenic. The law is on the books to protect our waterways, both upstream and downstream. We will be more than glad to work with you and share with you sample documents, including a small pamphlet from the City of Durham, "25 Things to Do to Prevent Water Waste", Second Nature, the story of Los Angeles' use of alternative methods to conserve water and prevent flooding, rather than further desecrate its inner city river, and the state's Natural and Scenic River Feasibility Study and Recommendations for the Cullasaj a River. This permit process is being closely watched. We hope that all means will be used to do what is right for all and set an example for others. Thank you. APPENDIX D. Speculative Effluent Limits for the Highlands WWTP Expansion, NPDES Permit NC0021407, Macon County, NC Michael F. Easley, Govemor State of North Carolina `*G William G. Ross, Jr., Secretary fA Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality Mr. Richard Betz Town Administrator P.O. Box 460 Highlands, North Carolina 28741 June 28, 2002 Subject: NPDES Permit application NC0021407 Highlands WWI P Macon County Return #2167 Dear Mr. Betz: The NPDES Unit received your application for an expansion at the Town of Highlands W' TP. This package was previously submitted and returned by the Division because it was submitted without a Finding of No Significant Impact (FONSI) and speculative limits. The speculative limits have been completed and are expected to be issued by mid July. As it was previously explained, the Division can not accept an expansion request before the State Clearinghouse reviews the Environmental Assessment and issues a FONSI. The Environmental Assessment (EA) for the Town of Highlands has not been received for review by the Division as of June 26, 2002. The process of reviewing the EA and issuing the FONSI has not begun yet, so it is difficult to predict how long it will take since it depends greatly on the magnitude of the project, the public interest and the impact of the project. In average, an EA review can take 5 to 6 months if there are no significant comments. For this reason, the Engineering Alternative Analysis must be returned. The application submitted will be accepted as the renewal application. The Engineering Alternative Analysis is hereby returned. Once the FONSI is issued, the expansion request can be resubmitted. At this time a fee of $400.00 will apply. If you have any questions concerning this request, please call me at (919) 733-5083, extension 595. Sincerely, C2/(A- Teresa Rodriguez NPDES Unit Cc: NPDES Files Kurt Wright — WK Dickson North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 (919) 733-7015 NCDENR FAX (919) 733-0719 Customer Service On the Internet at htto://h2o.enr.state.nc.us/ 1 800 623-7748 9-04-202 1 1: 2SAI t FRO' t State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary .Alan W: Klimek, P.E., Director • Mr. Diehard Betz Tows ' . • ' • trator rth Carolina 28741 tn< g/ay ArAA7Ty NaiENR NOrrn-+ ROt.INA DEPARTMENT OF EN VIP ON MENT ANQ NATURAL RESOURCES .August 14, 2002 Subject: Speculative Limits for the Town of Highlands NPDES Permit NC0021107 Highlands WWTP Macon County DearlMr. Betz: The Town of Highlands requescDd speculative limits for an expanded discharge of 1.5 MGD to the Cullasaja Rive. The Division of Water Quality has reviewed the request and provides the following response. The speculative limits presented here are based on our understanding of the proposal and of present environrnental conditions. The Division of Water Quality (DWQ) cannot guarantee that it will issue the Town an 3'PDES permit at the expanded flow rate. Nor can we guarantee that the effluent limitations and other '. requirements included in any permit will be exactly as presented here. Final decisions on these natters will be made only after the Division receives and evaluates a formal permit application for the Town's proposed discharge. Environmental Assessmertte of New Projects Please be aware that the Town of Highlands will have to evaluate this project for environmental impacts before receiving a modified permit. Anyone proposing co construct new or expanded waste treatment facilities using publi}r funds or public (state) lands must first prepare an Environmental Assessment (EA) when wastewater flews (1) equel or exceed 0.5 MGD or (2) exceed one-third of the 7Q10 flow of the receiving stream. DWQ Will not accep'.t a permit application for a projec: requiring art environmental assessment until the Division has approve.,.l the EA and sent a Finding of No Significant Impact (FONSI) to the stare Clearinghouse for review and cormmeet. If an Envircnrlental Assessment is required. it should contain a. dear justification for the proposed facility. It shoed provide an analysis of potertial alternatives, including a thorough evaluation of non -discharge alternatives. Nondischarge alternatives or alternative-; to expansion, such as spray irrigation. water conservatii n. inflow and iniiltratioreteduction or connection to a regional treatment and disposal system, are considered to i'e environmentally preferable to a surface water discharge. In accordance with the North Carolina General Statuses. the preferred alternative must be the practi_able wash, treatment and disposal alternative with the least advers.• impact on the environment is required to be implemented. If the EA demonstrates that the project may result itl a 1(717.'ti�lail Service Center, Raleigh, North Carolina 2?6c9-16 17 Telephone (919) 733-5083 FAX (919) 733-0719 Visrr OF ON THE INTERNE; r� htt,. /1n1n onr grata n- ,.c oanni:e An Equal Opportunity Affirmative Action Employer 9-434-202 1 1 : 26AI i FROM P. Sp I lative NPDES Limits .Town of Highlands NPOES NC0021407 sigtii�Eicant adverse effect or, the quality of the environment, you must then.Frepare an Environmental Impact Statement. Todd Kennedy of the Water Quality Planning Branch can provide additional information regarding the requirements of the N.C. Environmental Policy Act. You can contact Mr. Kennedy directly at (919) 733-5083, ext. 5,55. S�De, relative L'f£lueyat Limitt The fvirier 7Q10 flow has been updated. The winter 7Q1Q flow used during the previous permitting cycle was based on and. an analysis of flow records from 1971 through 1983 and included the influence of the hydroelectric ficiliy. Since the hydroelectric facility has been shutdown for sometime, the winter 7Q10 flow calculated during the previous permitting cycle is no longer accurate. Therefore, :he United States Geological Survey (USGS) .recal4uiated the winter 7Q10 flow and based on preliminary results, the winter 7Q10 flow has been revised to 7.45 cfs. Even though the winter 7Q10 has been updated, the flow having the greatest influence on permit limitations • continues to be the summer 7Q10. The summer 7Q10 flow remains unchanged since the previous permitting cy ci (confirmed by USCS). s 7. a c fs Based on the available information, tentative iirnits for a proposed expansion of the discharge to 1.5 MGD to the Cullasaja River are presented below. Effluent Limits for 13 MGD Flow • (MGD) 1.5 s 2.33 cfs BODs - Monthly Average (mg/L) 30.0 BOD$ - Weekly Average (mg/L) 45.0 NHs-N (Summer) - Monthly Average (mg/L) 3:4 NH3-N (Summer) - Weekly Average (mg/1) See Text NI-11-N (Winter) - Monthly Average (mg/L) 6.7 NHrN (Winter) - Weekly Average (mg/L) See Text Total Suspended Residue - Monthly Average (mg'L) 30.0 Total Suspended Residue -Weekly Average (mg/L) 43.0 Dissolved Oxygen (rngiL) 5.0 Fecal Coliform - Monthly Average (t/100 mL) 200 Fecal Coliform - Weekly Average (tft00 rnl..) 400 pH (5.U.) 6.0 - 9.0 Total Residual Chlorine (ug/L) 22 Chronic Toxicity Pass/Fail @ 24.4% with Ceriodaphnia Dubia Flow Limits. The flow will be limited to 1.5 MGD as requested by the consultant. This limit will be applied as a monthly average. BODs_ The limits for these parameters were based on the waste assimilating capacity of the receiving stream at low flow conditions. The limitations presented here are based on the results of a one dimensional dissolved oxygen model. Based on the results of this modeling effort, secondary treatment limits will protect North CaroUina's instrearn dissolved oxygen standard in the Cullasaja River. 1 9-04-202 1 1 : 26Af,1 FRO 1 P. 4 Speculative NPDES Limits Town of Highlands NPDES NC0021407 NNIH3-N,. Ammonia was evaluated for both dissolved oxygen depletion and toxicity. The limits for ammonia are based on protection of the instream toxicity and North Carolina's instream ammonia criteria. These speculative limits currently contain only monthly average limits for ammonia. The Division is currently evaluating an appropriate weekly average limit for all discharges in North Carolina. The current schedule is to complete this evaluation by September 30. 2002. At that time, th'e Division will begin requiring both monthly and weekly average limits for ammonia. Total'Suspended Solids. The limits for total suspended solids are standard for secondary treatment of municipal wastewater. Fecal:Coliform, pH, The limits for fecal coliform bacteria and'pH are derived to protect water quality in the receiting stream and remain the same as the existing permit. The fecal coliform limit is based on a geometric mear{. t Total:Residual Chlorine (TRC). In North Carolina, waters designated as trout waters have a TRC standard. Since the Oullasaja River is designated as trout water, a limit for total residual chlorine is included for protection of the TRC -tandard. Chronic Tonicity Testing. Chronic pass/fail toxicity testing at 24.4% with Ceriodaphnia Dubnia will be required in the NPDES permit for a wasteflow of 1.5 MGD. Quarterly monitoring will be required. The Division of Water Quality requires toxicity testing for major discharges. Since major is defined as greater than or equai to 1 MGD of Nast' flow, at the expanded flow the facility will be•considered a major discharger and a toxicity limit is required. Dissolved Oxygen. Limits for dissolved oxygen are based on protection of North Carolina's standard. Nutrients: Total Phosphorus, Total Nitrogen. No limits for nutrients are recommended at this time. However, if future instream assessments indicate that the accumulation of nutrients are creating eutrophication problems, nutrient limits may be added to the permit. • The Division of Water Quality will perform a ctznplete evaluation of limits and monitoring requirements for metals and other toxicants when we review the Town's formal permit application. I trust this response offers sufficient guidance for the County's proposed treatment plant. If you have any addi "onal questions about these limits, feel free to contact Michael Myers at (919) 733-5083, extension 508. Sincerely, David A. Goodrich Supervisor, NPDES Unit cc: Asheville Regional Office - Division of Water Quality CaIlie Dobson - Division of Water Quality, Planning Branch Todd Kennedy (Division of Water Quality, Planning Branch Central Files NPDES Unit Files /• APPENDIX E. EA Review Comments and Responses 1N A TF Michael F. Easley, Governor William G. Ross Jr., Secretary `O. QG North Carolina Department of Environment and Natural Resources Uj r Alan W. Klimek, P.E. Director Division of Water Quality C) "c July 15, 2002 Mr. H. Ward Marotti Robert J. Goldstein & Associates, Inc. 8480 Garvey Drive Raleigh, NC 27616 Subject: Completeness Review for Highlands WWTP EA - May 2002 DWQ# 13128 Dear Mr. Marotti: Comp1eft1ieSs keuiew Thdd kewKeity The Division of Water Quality (Division) has concluded a completeness review of the subject document. Please revise the EA to address the issues identified below. Next, submit ten copies to me for internal review by the Department of Environment and Natural Resources (DENR). Issues identified during. DENR review will need to be resolved prior to State Clearinghouse circulation. 1. Section 3.4: In the fifth paragraph, remove the speculative phrase, "...because regionalization would face political opposition." 2. Section 4.5: This section indicates that the State Historic Preservation Office (SHPO) had no comment during scoping. Does this mean there are no archaeological and historic resources in the area? This should be confirmed prior to DENR review. If necessary, contact SHPO directly to complete this section. 3. Sections 4.10.2 - 4.11.6: The various forest descriptions are not necessary. If desired, include. these. descriptions in an appendix. . : 4. Sections 4.13.1 - 4.13.50 and 5.13.1- 5.13.50: Summarize this information into a more concise form ' such as a table. If desired, the detailed species descriptions can be attached as an appendix .but: should; not be included in the main body of the document. • 5. As acknowledged in the EA, secondary and cumulative impacts associated with growth and' . - development may result from this project, including increased urban runoff. Throughout the. document, mitigation of these land use impacts is purportedly achieved through enforcement of the . zoning and subdivision ordinances as well as existing state programs. In the event that existing state and local programs do not provide adequate mitigation, additional local protection may need to be considered. Emphasis should be placed on.actual implementation of mitigation measures. Maintaining preclevelopment hydrologic functions is an important goal in watershed development. Planning design that reduces the creation of impervious area, provides for perviout green infrastructure, and maintains natural detention and retention functions should be encouraged. Disconnecting impervious surfaces, connecting pervious surfaces, and routing flow through vegetated conveyances can reduce impacts. When development in a watershed or subwatershed exceeds 10% to 15% impervious surface coverage, streams and the hydrologic regime are negatively impacted. At • increasing levels of imperviousness, it becomes especially important to implement appropriate N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 (919) 733-7015 Stia RUDENR Customer Service 1 800 623-7748 Highlands WWTP Page 2 stormwater control to reduce pollution, maintain groundwater recharge and minimize stream channel erosion. Stormwater controls should protect against stream damage due to increases in volume, velocity and peak rates of stormwater. While controls based on large storm events (e.g., 10-yr and 25-yr) may provide overbank flood protection and safely pass larger storm events, they fail to protect water quality and stream integrity. Smaller, more frequent storms are responsible for the majority of channel erosion in streams. And as imperviousness in the watershed increases, the frequency of these bankfull and mid-bankfull flows typically increases in response. For stream channel protection, design criteria should mimic the pre -development sediment transport characteristics of the stream. The typical two-year peak discharge control (to predevelopment levels) is often insufficient for channel protection: it does not properly address increases in detention -associated flow duration and development -associated peak runoff frequency. Extended detention of the one-year, 24-hour storm event will likely be needed to adequately protect channels. Equivalent control measures may also be considered. In addition, appropriate treatment of stormwater for water quality protection should be implemented. Provide a discussion on how stream channels will be protected from development impacts. The upper Cullasaja River and Mill Creek are rated impaired by the Division due to a number of development=.: related impacts including stormwater. Protection will be needed to prevent further degradation;to: • : these and other streams in the service area. Reliance on the water supply watershed protection ordinances, which are limited in scope, will likely not be sufficient. 6. Comprehensive protection of streams requires adequate buffer widths to maintain the multiple: aquatic ecosystem functions provided by riparian areas. Minimum buffer widths of 50 feet for intermittent streams and 100 feet for perennial streams are recommended. A significant portion of the buffer adjacent to the streambank should be undisturbed, natural vegetation. Alternative measures suitable for this area may be considered given they provide a similar level of protection. Additional buffer protection should be considered by the Town. In addition, since streams function as a continuum, the absence of protected riparian buffer along certain reaches will make it difficult, if not impossible, to avoid negative impacts in adjacent and, downstream reaches. Identify unprotected areas, indicate why they are not protected, and describe how impacts to these particular stream reaches will be avoided? Local protection may need . to be considered. 7. Other comments: • The mailing address of the State Project Agency is 1617 Mail Service Center, Raleigh 27699- 1617. The lead agency contact is J. Todd Kennedy. • Page IV: The caption for Figure 2 indicates Wake County. • Review and edit- the document for proper punctuation (e.g., double periods•throughout the document). • Section 7.0: An NPDES permit will also be required for this project. • Include a copy of the speculative limits letter from the Division as an attachment.• • Include this letter and all future agency correspondence in the attachments section. Highlands WWTP Page 3 Feel free to contact me at 919.733.5083 x555 if you need any further assistance. Thank you. Sincerely, 9, - - - - 2. J. Todd Kennedy SEPA Coordinator PENT Revi& ern NCDENR North Carolina Department of Environment and Natural Resources Michael F. Easley, Govemor William G. Ross Jr., Secretary MEMORANDUM TO: FROM: Todd Kennedy Division of Water Quality Melba McGee le Environmental Review Coordinator RE: #1204 EA for Town of Highlands WWTP, Macon County DATE: September 26, 2002 The referenced project has been circulated among our internal divisions. The attached comments should be addressed before this project moves forward. After you have satisfied the issues raised, please provide me. with a memorandum verifying that agency concerns have been adequately addressed. If substantive changes are made in the environmental assessment, I recommend the revised document be circulated again through our internal review process for final approval. Either way, agency comments will need to be addressed and incorporated into the environmental assessment prior to the State Clearinghouse review. Thank you for the opportunity to respond. Attachments 1601 Mail Service Center, Raleigh, North Carolina 27699-1601 Phone: 919-733-4984 \ FAX: 919-715-30601 Internet: www.enr.state.nc.us/ENR/ Michael F. Easley. Governor nF 1N Q rF� i William G. Ross Jr.. Secretary �� North Carolina Department of Environment and Natural Resources r Alan W. Klimek, P.E. Director Division of Water Quality rods k- viedy October 9, 2002 Mr. Gerald B. Pottern Robert J. Goldstein & Associates, Inc. 8480 Garvey Drive Raleigh, NC 27616 Subject: DENR Review for Highlands WWTP EA - August 26, 2002 DWQ# 13128 Dear Mr. Pottern: The Water Quality Section in the Division of Water Quality (Division), other agencies within the Department of Environment and Natural Resources (DENR), and the NC Wildlife Resources Commission (WRC) have completed a review of the subject document. Significant concerns were raised during this review. We agree with WRC's position that the ordinances presented do not provide adequate mitigation for secondary and cumulative impacts. Please address the issues below in a revised EA. Impaired Streams The upper Cullasaja River and Mill Creek are rated impaired by the Division due to a number of development -related impacts including stormwater. The Division will soon release a report entitled, Assessment Report: Biological Impairment in the Upper Cullasaja River Watershed, presenting the causes, sources and potential remedies for watershed impairment. Besides toxicants and the impacts of in -stream impoundments, one of the causes of impairment to Mill Creek is scour from urban stormflows. Such degradation from past development should highlight the need for enhanced protection measures to reduce impacts from future development. In addition, the assessment reveals that existing protections, including the :DVS -HI Tr classifications of both the Cullasaja River and Mill Creek, are not adequately protecting water quality. How will the Town prevent further degradation to these and other streams in the service area covered by this WWTP expansion? Stormwater We commend the Town for adopting provisions in its subdivision ordinance that permit the construction of clustered developments. Often, these developments have a decreased impact on the surrounding environment. However, other than this provision, there are few requirements that appear to provide protection to water resources and aquatic habitat. We recommend the Town consider adopting stormwater control requirements for protection of stream channels and reduction of runoff pollution. Additional development designs that reduce the creation of impervious area, provide for pervious green infrastructure, and maintain natural detention and retention functions should be encouraged. N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 (919) 733-7015 Customer Service 1 800 623-7748 Highlands WWTP Page 2 Stormwater runoff generated by development should be treated to decrease pollutant loading into nearby water bodies. Furthermore, stormwater controls should also protect against stream damage due to increases in volume, velocity and peak rates of stormwater. This is particularly important for catchements with greater than 10 to 15% impervious surface coverage. Extended detention of the one-year, 24-hour storm event should be considered to adequately protect stream channels. Alternative control measures may be appropriate for this area given that they reduce the frequency, magnitude and duration of post -development bankfull flow conditions and protect downstream channels from scour and erosion. Note that controls based solely on large storm events (e.g., 10-yr and 25-yr) may address overbank flood protection but generally fail to protect water quality and stream integrity. Stream Buffers We commend the Town on requiring undisturbed buffers in water supply watersheds. We have understood this to mean that a naturally vegetated buffer is protected. If this is not the case, please clarify. Also indicate the percentage of the service area that is protected by the water supply buffers. As mentioned in a previous letter, since streams function as a continuum, the absence of a protected riparian buffer along certain reaches will make it difficult to avoid negative impacts in adjacent and downstream reaches. As part of the mitigation for this project, we recommend that buffer protection be extended to all perennial and intermittent streams throughout the service area. A significant portion of the buffer adjacent to streambanks should be undisturbed, natural vegetation. It is important to note that the 25-foot buffer required for trout streams (Tr) in the service area is often inadequate for protection of streams from the full array of secondary impacts. Other Comments • Provide responses and revisions to the document, where appropriate, for the attached comments from WRC and the Division's NPDES Unit. • Page numbers were missing from much of the document. • Section 1.0: Delete the second paragraph. • Section 5.8: Delete the second sentence of the second paragraph. As highlighted above, additional local protection should be considered to support a Finding of No Significant Impact (FONSI). The Town may wish to consider a local resolution indicating a commitment, implementation plan, and time frame for adopting additional protection measures for impacts from new development accommodated by this WWTP expansion. Highlands WWTP Page 3 We recommend that you contact WRC directly regarding their comments. Once revisions have been completed, submit one copy to the Division and another to WRC for review. Feel free to contact me at 919.733.5083 x555 if you need any further assistance. Thank you. Sincerely, •'/S J. Todd Kennedy NC Environmental Policy Act Coordinator Attachments CC: Owen F. Anderson, WRC w/o attachments r. Rodnyu ez NC Division of Water Quality NPDES Unit MEMORANDUM To: Todd Kennedy • Throu9 h: Dave Goodrich From: Teresa Rodriguez 1ti- Date: October 1, 2002 Subject: Town of Highlands EA The Town of Highlands submitted an Environmental Assessment for the expansion of the Wastewater Treatment Plant from 0.5 MGD to 1.5 MGD. We commend the Town for initiating public participation early in the process by holding a public meeting to explain the proposed expansion. The following comments are offered regarding the Environmental Assessment document: ♦ Growth rates of 1.79 and 3.93 for the residential and seasonal population were used for the flow estimate. Provide the source or reference for the growth rates used in the flow projections for both the permanent residents and the seasonal residents. • The areas to be annexed include existing developments. Describe the methods of wastewater disposal for the existing developments and any existing discharge permits. Have these developments given the town any letter of intent to connect? Please provide a discussion of the level of commitments from the areas to be annexed. ♦ The town will extend sewer service to areas served by on -site treatment systems. Describe the operational conditions or known problems (if any) of the existing on -site treatment systems. • Evaluate the alternative of reusing wastewater in existing or proposed golf courses as part of the Engineering Alternatives Analysis. NCli1RC Fax Sep 26 '02 10:30 P. 03 Q. 4Hderse6 North Carolina Wildlife Resources Commission Charles R. FuIlwood, Executive Director MEMORANDUM TO; Melba McGee, Environmental Coordinator Office of Legislative�a d Inyertment airs • FROM: Owen P. Anderson, ntair Region Coordinator Habitat Conservation Program DATE: September 26, 2002 SUBJECT: Environmental Assessment for Town of Highlands WWTP, Macon County, North Carolina, DENR No. 1204 Biologists with the North Carolina Wildlife Resources Commission (NCWRC) have reviewed the subject document. These comments are provided in accordance with certain provisions of the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.G. 661 et seq.), the North Carolina Statutes (G.S, 113-131 et seq.), and the National Environmental Policy Act (42 U.S.C. 4332(2)(c)). The Town of Highlands proposes to expand the wastewater treatment plant to serve the Town of Highlands and five annexation areas. The expansion will triple treatment capacity from 0.5 to 1,5 million gallons per day. There is no reference to expansion of the collection systems; however, the scoping letter refers to an annexation area. There are significant aquatic and terrestrial resources within the affected area of this project. Most of the affected area appears to be in the Cullasaja River watershed but some impacts may occur within the Chattooga River drainage. Both of these streams support significant aquatic resources. in the Highlands area, many of the streams within these two basins are either classified by the Division of Water Quality as trout waters or are designated trout waters by the NCWRC. Additionally, Big Creek, Lake Sequoyah and a portion of Mirror Lake are classified as WS-III tr HOW. Additionally, the streams in the area provide significant recreational opportunities. The North Carolina Natural Heritage Program identifies a number of natural heritage elements for the Highlands area. These elements are both on public and private lands and include plants, animals and Community types. For example, there is a Southern Appalachian bog near one annexation area and a record for a bog turtle (C'lemrnys mulenbergii) in the vicinity of this annexation area but in a different location than the bog. Bogs provide important habitat for fish dv and wildlife a federallyhe State threateneds species,ly threatened we request that h proe. ject t1nce this sponsors project their could adversely impactY Mailing Address: Division of Inland Fisheries • 1721 Mail Service Center - Raleigh, NC 27699-1721 Telephone: 19191 733-3633 ext. 2R 1 • Fax: (919) 715-7643 NCWRC Fax Sep 26 '02 10:30 P.04 Town of Highlands WWTP 2 Macon County, Cullasaja & Chattooga Rivers September 26, 2002 consultants consult early in the project with the U.S. Fish and Wildlife Service. The Service can be contacted in Asheville at (828) 258-3939. The environmental assessment was well written and did a good job of describing the project. We agree that there should be little direct impact from the construction of the new wastewater treatment plant. The site was graded in 1994; thus, we believe that habitat values At this site are limited. • There should be some benefits from the expansion of the wastewater treatment plant so effluent quality should improve. If pollutant concentrations are reduced through the new permit . and chlorine is eliminated, aquatic life downstream of the discharge should benefit. However, adverse secondary and cumulative impacts could more than off` set these benefits. The EA points out the significance of the Highlands area. We certainly agree with the statement, "The Highlands area is geologically, topographically and ecologically unique, even within the context of the regionally unique southern Appalachian Mountains." The EA points out that much of the service area contains suitable habitat for many rare species that are known from the Highlands area, The new infrastructure will provide a stimulus for new development that will result in increased land clearing, increased impervious surfaces, increased urban runoff and unregulated construction in streams and riparian zones. Wildlife may be impacted from secondary and cumulative impacts from the land clearing, sewer construction, and fragmentation of habitat. Species that could be impacted include rare plants and animals and community types. Several streams, Mill Creek and Cullasaja River, are notsupporting their intended uses. These streams are listed on the 303(d) list. Biological recovery in Mill Creek is considered to be problematic due to golf courses and urban development. We are concerned that additional development resulting from WWTP expansion will only exacerbate the problems with these and threaten additional streams within the Highlands area, The EA includes some information on ordinances; however, given the significance of the Highlands area, we do not believe that these ordinances provide nearly enough protection to mitigate for the sipilcant secondary and cumulative impacts that can result from growth and development facilitated by the infrastructure expansion. We are unable to concur with this project due to a lack of adecjuate mitigative measures to address the potential secondary and cumulative impacts to the significant fish and wildlife resources and respective habitats. Information needs to be provided on the following specific items before we can complete review of this project. 1. Although the EA identified a resource, the Highlands Land Trust, that is available to assist the town and landowners in developing protection strategies for ecologically sensitive lands, including rare species, we did not find in commitment to such a plan. Given the habitat values and known records of rare species, the new service areas need to be thoroughly surveyed and protection strategies developed and implemented based on these surveys prior to expanding the infrastructure. 2. Several streams in the Highlands area 'tie on the 303(d)-priority list. Local initiatives and ordinances could help address this situation, What initiatives or ordinances are in place to assist with the restoration of these streams and protection of wetland areas? Since golf courses are a major factor in this impairment, special attention and work needs to be done on the golf courses to reduce pollutants and establish forested riparian buffers where needed, Restoration of forested riparian buffers, greenways and stormwater management are especially relevant to the overall discussion. NCWRC Fax Sep 26 '02 10:31 P.05 Town of Highlands WWTP 3 September 26, 2002 Macon County, Cullasaja & Chattooga Rivers 3. Sewer line extensions should be included in this assessment since the WWTP is pri ily being expanded to serve new areas. Fragmenting projects makes assessmenttimpacts and determining measures to mitigate those impacts difficult. 4. We request that the WWTP be equipped with emergency generators to provide power Q all essential treatmenf=works during a power outage. We do not consider dual,feed power supplies to be an adequate emergency power source. 5. Althoughthe pond -draining ordinance is a good idea, the turbidity standard trout man ohe streams in the Highlands area are trout streams. The State ntuond- standard for waters is 10 ntu and for lakes is 25 ntu. Please provide clarification of wh the y p draining ordinance is set at 50 ntu rather than 10. G. Wh at ordinances and initiatives are in place to address stormwater runoff from residential development and individual commercial structures? Given that Hipp 1 nd i s primarily s wales, p,grassed residential community, stormwater management measures (e.g., usinesses mould provide sheet flow and pervious pavement) for individual residences cumulative water quality benefits and protect area streams from scouring. In addition to providing the.preceding information, the NCWRC requests that the of the Town of Highlands implement the following guidelines to mitigate the secondary imp actsproposed project on fish and wildlife resources. 1. We recommend the maintenance or establishment of a minimum 100-foot native forested buffer along each side of perennial streams and 50-foot native forested buffer service eeach side of intermittent streams and wetlands throughout the present and or the entire municipal jurisdiction (EPA 2000; Stewart et al. 2000). We additionally encourage the implementation of buffers on ephemeral streams due ot he Peteportant et al. functions that they provide as headwater streams (Alexander et a , 2001). Buffers should be measured horizontally from the cdge ofthe stream bank Knutson and Naef 1997), which may result in wider buffers on higher gradients, dea n s,� der, must be provided over the entire length of stream, including headwaterwould include recommend leaving30% of the development area as greenspace, which we is connected to natural resources. buffers and wetlands and ensure that the greenspace Wide, contiguous riparian buffers have greater and more flexible potential than maintainr biological integrity (Horner et al, 1999) and could amelioratemany options to g �' ecological issues related to land use and environmental quality (Naiman et habitat ain change,93). As ex ansion of developed areas continues into the watershed, wildlife v 1 corridor become fragmented, and even disappear. Riparian buffers additionidriparian tbuffers serve to habitat areas for wildlife displaced by development. protect water quality by stabilizing stream banks, filtering capacity of stormwater runoff, and provide habitat for aquatic and fisheries resources. of 2. We recommend that sewer lines, water lines, and other utility infrastructure be kept out riparian buffer areas (Knutson and Naef 1997; and references therein). All utility crossings should be kept to a minimum, which includes careful routingesithere ts not the combination of utility crossings into the same right-of-way fipnctionesdis ro disproportionate to issue), piscontiguous buffer segments can impair riparian Horner 2000; Van Sickle the relative occurrence of the breaks in the Cumular tive impacts. The directional bore 2000), and multiple crossings can result Installation of utilities beneath the riverbed, avoiding impacts to the stream and buffer) stream crossing method should be used for utility crossings wherever practicable, the open cut stream crossing method should only be used when water level is lowed and nwstream flow is minimal. Manholes or similar access structures should not NCWRC Fax:828-452-7772 Sep 26 '02 10:32 P.06 Town of Highlands WWTP 4 Macon County, Cullasaja & Chattooga Rivers September 26, 2002 buffer areas. Stream crossings should be near perpendicular (75° to 105°) to stream flow and should be monitored at least every three months for maintenance needs during the first 24 months of the project and then annually thereafter. Sewer lines associated with crossing areas should be maintained and operated at all times to prevent the discharge to land or surface waters. We recommend a minimum 50-100-foot setback on all streams, sakes, and wetlands for these structures, which falls in line with the recommended buffer widths. In circumstances where minimum setbacks cannot be attained, sewer lines shall be constructed of ductile iron or other substance of equal durability. Further, pesticides (including insecticides and herbicides) should not be used for maintenance of rights -of - way within 100 feet of perennial streams and 50 feet of intermittent streams, or within floodplains and wetlands associated with these streams. 3. Avoid the removal of large trees at the edges of construction corridors. Re -seed disturbed areas with seed mixtures that are beneficial to wildlife. Avoid fescue -based mixtures because fescue is invasive and provides little benefit to wildlife. Native, annual small grains appropriate for the season are preferred and recommended (See http://www.l e . tattlic uslwet, lantlwetland_plants.htt and http:/lwww.co.mecklenburg.nc.us/coenglStotm/services/ve1tionlveaetation.htm . to establish brushpiles Where feasible, use woody debris and logs from corridor clearing and downed logs adjacent to the cleared right-of-way to improve habitat for wildlife- Allowing the corridor area to revegetate into a brush/scrub habitat would maximize benefits to wildlife. For areas adjacent to residential areas, a native shrub/grass option may also be beneficial. Minimize corridor maintenance and prohibit mowing between April 1 and October 1 to minimize impacts to nesting wildlife. We suggest a maintenance schedule that incorporates only a portion of the area —one third of the area, for example —each year instead of the entire project every 3 or 4 years. Herbicides and pesticides should never be used in wetland areas or near streams, as described above in item 3: 4. We recommend that the local governments prohibit commercial or residential development within the 100-year floodplain. Undeveloped floodplains strongly influence aquatic systems, support a combination of riparian and upland vegetation used by aquatic communities (Junk et al. rich source of food to and terrestrial wildlife, supply aaquatic 1989), and provide an important sediment trapping function (Palik et al. 2000). The filling of floodplains increases the potential for flooding of adjacent properties and interferes with the natural hydrologic process of the waterways. It also disrupts the continuity of migration corridors for wildlife. Instead, we recommend that developers set aside a portion of the land to be developed as green space and concentrate these areas along the streams and rivers (see Item 1 above). In addition we encourage "infill" (new development in unused or underutilized land in existing urban areas) development in urbanized portions of the jurisdiction and recommend the site practices for infill and brownfield development issued by the U. S. Environmental Protection Agency (EPA) Ottp://www.epa.gQv; accessed May 2002) and the Center for Watershed Protection (http;/twww.cwp.org/; accessed May 2002). Floodplain maps may need to be updated to reflect development of the watershed. Floodplain remapping studies in Charlotte showed that buildout conditions would result in a floodplain width change from an average of 429 feet to 611 feet (http://www.co:mklenburg nc. n storm/floo s.httn; accessed May 2002) 5 We recommend that the local government limit impervious surfaces to less than 10% of the watershed (Schueler 1994; Arnold and Gibbons 1996; Doll et al. 2000; Mallin et al. 2000; May and Horner 2000; Stewart et al. 2000; Paul and Meyer 2001). The construction of roadways and other impervious surfaces in new neighborhoods can produce short-term direct impacts as well as long-term cumulative effects. Multiple studies have shown that stream degradation occurs at approximately 10% coverage by NCWRC Fax:828-452-7772 Sep 26 '02 10:33 P.07 Town of Highlands WWTP 5 Macon County, Cullasaja & Chattooga Rivers September 26, 2002 impervious surfaces (Schueler 1994; Arnold and Gibbons 1996; Doll et al. 2000; Mallin et al. 2000; May and Horner 2000; Stewart et al. 2000; Paul and Meyer 2001). Likewise, the Wake County Watershed Management Plan Task Force performed a correlation analysis of impervious surfaces to watershed classification based on water quality data, and they found that watersheds of unimpaired streams averaged 8% imperviousness, impacted streams averaged 11%, and degraded streams averaged 24% (http;//projects.ch2m.com/Wak.ecountyl; accessed May 2002). We also recommend that the local goverrunent provide for sufficient open space to effectivelyreduce impervious surface so that predevelopnment hydrographic conditions are maintained, limit curb and gutter in new'developments, and prevent direct discharges of stormwater into streams. To achieve no net change in the hydrology of the watershed, we recommend installation of grassed swales in place of curb and gutter and on -site stormwater management (i.e. bioretention areas or other attenuation measures). These designs often cost less to install (Kwon 2000) and significantly reduce environmental impacts from residential development. Information regarding financing stormwater management can be found at Inv :llstormwaterriance.urbancenter.i iWedu/ (accessed May 2002). Many of these recommendations have been applied in Maryland to protect the Chesapeake Bay from water quality degradation (MDE 2000). Suggested examples to accomplish the <10% impervious goal are using conventional designs at a level of <10% imperviousness or using conservation clusters with higher densities, with dedicated open space and other stormwater control measures to mimic the hydrograph consistent with an impervious coverage of less than 10%. Reduction of road widths is one method to reduce overall impervious surface coverage. The N. C. Department of Transportation (NCDOT) has issued road guidelines that allow for the reduction in street widths when compared to standard secondary road guidelines. This material can be found at In addition, dPh,dot statemc,us/o rations/tnd.pdf. (accessed May 2002). there are site planning practices that, when incorporated with the above mentioned road building guideline, can further reduce the amount of impervious surface within a site (see recom mendations in the document Better Site Design (Center for Watershed Protection; http:llwww.cwp.org/; accessed May 2002). 6. Use bridges for all permanent roadway crossings of streams and associated wetlands to eliminate the need to fill and culvert, where practicable. If culverts must be used, the culvert should be designed to allow passage of aquatic organisms. Generally, this means that the culvert or pipe invert is buried at least one foot below the natural streambed. If multiple cells are required, the second and/or third cells should be placed so that their bottoms are at stream bankfull stage. This will allow sufficient water depth in the culvert or pipe during normal flows to accommodate movements of aquatic organisms. If culverts are long and sufficient slope exists, baffle systems are recommended to trap gravel and provide resting areas for fish and other aquatic organisms. If multiple pipes or cells are used, at least one pipe or box should be designed to remain dry during normal flows to allow for wildlife passage. In addition, culverts or pipes should be situated so q P � that no channel realignment or widening is required. Widening of the stream channel at the inlet or outlet of structures usually causes a decrease in water velocity causing sediment deposition that will require future maintenance. Finally, riprap should not be placed on the streambed. 7. We recommend that municipalities incorporate the elements listed below into their erosion and sediment control plans (see Brown and Caraco 2000 for additional information). Sediment is considered the most important cause of water pollution in the United States (Waters 1995), and construction is considered the most damaging phase of the development cycle to aquatic resources (Brown and Caraco 2000). NCWRC Fax:828-452-7772 Sep 26 '02 10:34 P.08 Town of Highlands WWTP 6 September 26, 2002 Macon County, Cullasaja & Chattooga Rivers a) Minimize clearing and grading and only perform these operations in the context of an overall stream protection strategy. and stabilize b) Protect waterways by preventing clearing adjacent to waterways, drainage ways. c) Phase construction for larger construction sites (325 acres) to reduce the time and area that disturbed soils are exposed. d) Stabilize soils as rapidly as possible (<2 weeks) by establishing a grass or Mulch cover. e) Protect steep slopes, and avoid clearing or grading existing steep slopes as much as possible. f) Establish appropriate perimeter controls at the edge of construction sites to retain or filter concentrated runoff from relatively short distances before it leaves the site. g) Employ advanced settling devices that contain design features which include greater wet or dry storage volume, perforated risers, better internal geometry, use of baffles, skimmers and other outlet devices, gentler side -slopes, and multiple cell construction. h) Implement a certified contractors program so that trained and experienced contractors are on -site. i) Sedimentation impacts should be minimized by regular inspection of erosion control measures, and sediment control devices should be maintained in good and effective condition at all times, Erosion and sediment controls should be reassessed after storms. The incorrect installation of erosion control structures and those not properly maintained can result in sedimentation impacts to nearby streams and wetlands. Thank you for the opportunity to provide input into this project review. If you need these comments, please contact me at 828-452-2546 ext 24. further information on cc: Brian Cole, Supervising Biologist, USFWS J. Todd Kennedy, Environmental Coordinator, DWQ Steve Hall, Zoologist, NC Natural Heritage Program References: Alexander, R. B., R. A. Smith, and G. E: Schwarz. 2000. Effect of stream channel size on the delivery of nitrogen to the Gulf of Mexico. Nature 403 :758-761. Arnold, C. L., and C. J. Gibbons. 1996. Impervious surface coverage —the emergence of a key environmental indicator. Journal of the American Planning Association 62:243-258. Brown, W., and D. Caraco. 2000. Muddy water in - muddy water out? Watershed Protection Techniques 2(3):393-403. Doll B. A. D. E. Wise -Frederick, C. M. Buckner, S. D. Wilkerson, W. A. Harman, and R. E. Smith. 2000. Hydraulic geometry relationships for urban streams throughout the piedmont of North Carolina. Pages 299-304 in P.J. Wigington, Jr. and R.L. Beschta, eds. Proceedings of the American Water Resources Association International Conference on riparian ecology and management in multi -land use watersheds, Portland, Oregon. SPA (U. S. Environmental Protection Agency). 2000. Model ordinances to protect local resources. EPA, Office of Water, Washington, D. C. Available; inizi!w_w_.w,sa;goy/_owowwtrlllsIPS/Ardinancg/ d.o. ..m. (May 2002). Horner, R. R., C. W. May, E. H. Livingston, and J.Maxted. 1999. Impervious cover, aquatic community health, and stormwater BMPs: is there a relationship? Proceedings of the Sixth Biennial Stormwater Research Conference; Tampa, Florida. NCWRC Fax:828-452-7772 Sep 26 '02 10:34 P.09 Town of Highlands WWTP 7 Macon County, Cullasaja & Chattooga Rivers September 26, 2002 Junk, W. J., P. B. Bayley, and R: E. Sparks. 1989. The flood pulse concept in river-floodplain systems. Pages 110-127 in D. P. Dodge, ed. Proceedings of the International Large River Symposium. Canadian Special Publication of Fisheries and Aquatic Sciences 106, Ottawa. Knutson, K. L., and V. L. Naef. 1997. Management recommendations for Washington's priority habitaits: riparian. Washington Department of Fish and WildIife, Olympia. Kwon, H. 2000. An introduction to better site design. Watershed Protection Techniques 3(2)623-632. Mallin, M. A., K. E. Williams E. C. Esham, and R. P. Lowe. 2000. Effect of human development on bacteriological water quality in coastal watersheds. Ecological Applications 10:1047-1056. May, C. W., and R. R. Horner. 2000. The cumulative impacts of watershed urbanization on stream -riparian ecosystems. -ri arian Pages 2S1-286 in P. J. Wigington, Jr. and R. L. Beschta, g eds. Proceedings of the American Water Resources Association International Conference on riparian ecology and management in multi -land use watersheds, Portland, Oregon. NCDEHNR. 1994. Tar -Pamlico River Basinwide Water Quality Management Plan. North Carolina Department of Environment, Health, and Natural Resources, Division of Environmental Management, Water Quality Section. MDE (Maryland Department of the Environment). 2000. 2000 Maryland stornwater design manual, volumes I and U. Center for Watershed Protection and MDE, Water Management Administration, Baltimore, Maryland. Available: http://mww,� .mde.state.m . a en ironment/wmalstotmwatetmanuali. (May 2002). Naiman, R. J., H. Decamps, and M. Pollock. 1993. The role of riparian corridors in maintaining regional biodiversity. Ecological Applications. 3:209-212. Palik, B. J., J. C. Zasada, and C. W. Hedman. 2000. Ecological principles for riparian silviculture. Pages 233-254 in E. S. Verry, J. W. Hornbeck, and C. A. Dolloff, eds. Riparian management in forests of the continental eastern United States. Lewis Publishers, Boca Raton, Florida. Paul, M. J., and J. L. Meyer. 2001. Streams in the urban landscape. Annual Review of Ecology and Systematics 32:333-365. Peterson:, B. J., W. M. Wollheim, P. J. Mulholland, J. R. Webster, J. L. Meyer, J. L. Tank, E. Marti, W. B. Bowden, H. M. Valett, A. E. Hershey, W. H. McDowell, W. K. Dodds, S. K. Hamilton, S. Gregory, and D. D. Morrall. 2001. Control of nitrogen export from watersheds by headwater streams. Science 292:86-90. Schueler, T. 1994. The importance of imperviousness. Watershed Protection Techniques. 1(3):100-111. Stewart, J. S., D. M. Downes, L.Wang, J. A. Wierl, and R. Bannerman. 2000. Influences of riparian corridors on aquatic biota in agricultural watersheds. Pages 209-214 in P. J. Wigington, Jr. and R. L. Beschta, eds. Proceedings.of the American Water Resources Association International Conference on riparian ecology and management in multi -land use watersheds, Portland, Oregon. Van Sickle, J. 2000. Modeling variable -width riparian buffers, with an application to woody debris recruitment. Pages 107-112 in P. J. Wigington, Jr. and R. L. Beschta, eds. Proceedings of the American Water Resources Association International Conference on riparian ecology and management in multi -land use watersheds, Portland, Oregon. Waters, T. F. 1995. Sediment in streams: sources, biological effects, and control. American Fisheries Society Monograph 7, Bethesda, Maryland. Age5 State of North Carolina NCUIeN i Department of Environment and Natural Resources Project Number: IA 0(1 Due Date: i%gi AZo Reviewing Office: INTERGOVERNMENTAL REVIEW — PROJECT COMMENTS After review of this project it has been determined that the DENR permit(s) and/or approvals indicated may need to be obtained in order for this project to comply with North Carolina Law. Questions regarding these permits should be addressed to the Regional office indicated on the reverse of this form. All applications, information and guidelines relative to these plans and permits are available from the same Regional Office. PERMITS SPECIAL APPLICAT10N PROCEDURES or REQUIREMENTS Normal Process Time (Statutory Time Limit), lcp. Permit to construct & operate wastewater treatment facilities, sewer system extensions & sewer systems not discharging into state surface waters. . Application 90 days before begin construction or award of construction contracts. On -site inspection. Post -application technical conference usual. 30 days (90 days) EANPDES-permit to discharge into surface water and/or permit to operate and construct wastewater facilities discharging into state surface waters. Application 180 days before begin activity. On -site inspection preapplication conference usual. Additionally, obtain permit to construct wastewater treatment facility -granted after NPDES. Reply time, 30 days after receipt of plans or issue of NPDES permit -whichever is later. , 90 -120 days (N/A) 0 Water Use Permit Preapplication technical conference usually necessary 30 days (N/A) ID Well Construction Permit . Complete application must be received and permit issued prior to the installation of a well. _ 7 days (15 days) Dredge and Fill Permit Application copy must be served on each adjacent riparian property owner. On -site inspection. Preapplication conference usual. Filling may require Easement to Fill from N.C. Department of Administration and Federal Dredge and Fill Permit. 55 days (90 days) Permit to construct & operate Air Pollution Abatement facilities and/or Emission Sources as per 15 A NCAC (2Q.0100, 2Q.0300, 2 H.0600) N/A 60 days Any open burning associated with subject proposal must be in compliance with 15 A NCAC 2D.1900 N/A 60 days (90 days) El Demolition or renovations of structures containing asbestos material must be in compliance with 15 A NCAC 2D.1110 (a) (1) which requires notification and removal prior to demolition. Contact Asbestos Control Group 919-733-0820. -0 Complex Source Permit required under 15 A NCAC 2D. 00 j. e Sedimentation Pollution Control Act of 1973 must be properly addressed for any land disturbing activity. An erosion & sedimentation control plan will be required if one or more acres to be disturbed. Plan filed with proper Regional Office (Land Quality Section) at least 30 days before beginning activity. A fee of 540 for the first acre or any part of an acre. 20 days (30 days) 0 The Sedimentation Pollution Control Act of 1973 must be addressed with respect to the referenced Local Ordinance. 30 days El Mining Permit On -site inspection usual. Surety bond filed with DENR. Bond amount varies with type mine and number of acres of affected land. Any are mined greater than one acre must be permitted. The appropriate bond must be received before the permit can be issued. 30 days (60 days) North Carolina Burning permit On -site inspection by N.C. Division of Forest Resources if permit exceeds 4 days 1 day (N/A) 0 Special Ground Clearance Burning Permit-22 counties in coastal N.C.. with organic soils. On -site inspection by N.C. Division of Forest Resources required 'if more than five. acres of ground clearing activities are involved. Inspections should be requested at least ten days before actual burn is planned." 1 day (N/A) O Oil Refining Facilities N/A 90 -120 days (N/A) El Dam Safety Permit If permit required. application 60 days before begin construction. Applicant must hire N.C. qualified engineer to: prepare plans, inspect construction. certify construction is according to DENR approved plans. May also require permit under mosquito control program, and a 404 permit from Corps of Engineers. An inspection of site is necessary to verify Hazard Classification. A minimum fee of 5200.00 must accompany the application. An additional processing fee based on a percentage or the total project cost will be required upon completion. 30 days (60 days) PERMITS SPECIAL APPLICATION PROCEDURES or REQUIREMENTS N. .... _ SS Time (Statutory Time'...imit) Permit to drill exploratory oil or gas well File surety bond of S5,000 with DENR running to State of N.C. conditional that any well opened by drill operator shall, upon abandonment, be plugged according to DENR rules and regulations. 10 days y (N/A) Geophysical Exploration Permit Application filed with DENR at least 10 days prior to issue of permit Application by letter.No standard application form. 10 days -(N/A) - State Lakes Construction Permit Application fees based on structure size is charged. Must include descriptions & drawings of structure & proof of ownership of riparian property. 15 - 20 days (N/A) 0 401 Water Quality Certification N/A 55 days (130 days) F0 CAMA Permit for MAJOR development S250.00 fee must accompany application 60 days (130 days) ❑ CAMA Permit for MINOR development S50.00 fee must accompany application 22 days . (25 days) O Several geodetic monuments are located in or near the project area. If any monument needs to be moved or destroyed, please notify: N.C. Geodetic Survey, Box 27687 Raleigh, N.C.27611 0 Abandonment of any wells, if required must be in accordance with Title 15A.5ubchapter 2C.0100. El Notification of the proper regional office is requested if "orphan" underground storage tanks (USTS) are discovered during any excavation operation. El Compliance with 15A NCAC 2H 1000 (Coastal Stormwater Rules) is required. 45 days (N/A) * Other comments (attach additional pages as necessary, being certain to cite comment authority) • Qu stions regarding these Asheville Regional Office 59 Woodfin Place Asheville, N.C. 28801 (828) 251-6208 ❑ Fayetteville Regional Office 225 Green Street, Suite 714 Fayetteville, N.C. 28301 (910) 486-1541 REGIONAL OFFICES permits should be addressed to the O Mooresville Regional Office 919 North Main Street Mooresville, N.C.28115 (704) 663-1699 ❑ Raleigh Regional Office 3800 Barrett Drive, P.O. Box 27687 Raleigh, N.C.27611 (919) 571-4700 ❑ Washington Regional Office 943 Washington Square Mall Washington, N.C. 27889 (252) 946-6481 Regional Office marked below. O Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 ❑ Winston-Salem Regional Office 585 Waughtown Street Winston-Salem, N.C. 27107 (336) 771-4600 RESPONSES TO DENR DRAFT EA REVIEW COMMENTS Mr. Richard Betz, Highlands Town Administrator provided comments to RJG&A in response to the Draft EA review comments from Todd Kennedy, DWQ (9 October 2002), Teresa Rodriguez, DWQ (1 October 2002), and Owen Anderson, WRC (26 September 2002). The following responses are primarily those of Mr. Betz, with further comments added by the environmental consultants where applicable (in Times New Roman bold font). 1. DIVISION OF WATER QUALITY -- Todd Kennedy. The first section, "Impaired Streams," refers to the recent report on the Upper Cullasaja River Watershed and the impaired rating of Mill Creek. These comments, together with many of the comments of the Wildlife Resources Commission, seem to focus wholly on water quality above the WWTP discharge, and also seem to be based on a misunderstanding about the objective of the VWVTP expansion. The expansion of the plant will involve new tertiary treatment technology (as the WRC letter admits), will not adversely impact the Cullasaja River, and faced no objection at the public hearings. The proposed capacity is expected to provide treatment for existing development in new areas, not new development. The service areas identified in the Preliminary Engineering Report included several subdivided areas which the Town may consider annexing in the future, as well as existing areas already within the corporate limits. All of these areas are already subdivided, and many of the Tots are already developed residentially and are served with either a package treatment plant (Highlands Falls outside of Town, Highlands Country Club and Shelby Place inside of Town) or with subsurface septic tanks. The Town's objective is twofold: (1) to eliminate the package treatment plants and incorporate them into the municipal system, and (2) to make sewer service available both inside and outside of Town where failing septic systems are likely, especially around the Town's water resources. The ongoing program of eliminating package treatment plants is well underway. In September of last year, the Town completed construction of a sewer collection line along the west shore of Lake Sequoyah, which made possible the elimination of the Highlands Mountain Club package plant and discharge. The S.B. Association plant (50,000 GPD) serving Highlands Country Club and Shelby Place will be eliminated this year; an agreement is currently being reviewed, and the NPDES permit will expire on November 30. As with the Highlands Mountain Club, which consisted of 80 residential units constructed in the late 1970's, this capacity does not serve new development; it serves existing subdivisions operating unreliable package treatment plants and discharging into Lake Sequoyah, which was recently designated a Class 1 water supply reservoir. In the 1996, the Town adopted a collection system policy which serves as the basis of placing sewer system extension in its Capital Improvement Program: "In considering sewerage system extensions, the Board shall first take into consideration the public health and safety. First priority for extensions of the sewerage system shall be those areas in close proximity to raw water intakes, such as the Lake Sequoyah and the Big Creek Arm of Lake Sequoyah; those areas in close proximity to other streams or lakes; those areas where the Board of Commissioners has agreed that an overall problem exists with regard to septic tanks because of visible malfunction of systems and inadequate repair areas; and those areas where the Board of Commissioners has agreed that older sewer service lines are in poor repair and/or are subject to inflow and infiltration." [Highlands Code, 15247(b)] In addition to the West Shore Lake Sequoyah collection line, a line was constructed along the south shore of Mirror Lake and the north shore of Lake Sequoyah as part of the WWTP project. This line made it possible to eliminate at least one package treatment plant, serving On the Verandah Restaurant and discharging directly into Lake Sequoyah; it also made it possible to elminate several residential septic systems. Collection lines have also been constructed along the east shore of Big Creek on Hickory Hill Road, and along the south shore of Lake Sequoyah and Munger Creek on NC106 this year. None of these collection lines served new development. Existing businesses, such as Old Creek Lodge on NC106, are currently being served by an inadequate septic system. The line also made possible the connection of a small residential apartment building to the municipal sewer which had a history of repeated septic tank malfunctions, resulting in numerous fines and notices of violation from the Asheville Regional DENR office and the County Health Department. The commercial downtown business district, which is bisected by Mill Creek, is already provided with sewer service, and no expansion is planned or necessary in this area. The question, "How will the Town prevent further degradation to these and other streams in the service area covered by this VVVViP expansion?" is therefore meaningless with respect to the impaired strean, Mill Creek, and the downtown area. Moreover, the Town's 1989 Land Use Plan resulted in extensive "downzoning" from commercial to residential, and thus there is no longer any significant potential for additional commercial development in the business area. The one remaining property of any size, a 0.78 acre tract on the corner of Pine Street and Fifth Street, is at least 300 feet from Mill Creek, and has direct access to municipal sewer. The portion of Mill Creek which flows through the Town's recreational park is undeveloped along the stream and by policy will remain that way. The other service areas, such as Highlands Country Club inside Town and, potentially, Highlands Falls Country Club outside of Town, will be protected from degradation through a stringently enforced local Soil Erosion and Sedimentation Ordinance and Watershed Protection requirements that exceed the requirements of the State (see below). RJGA Comment: Mr. Kennedy notes that the WS-III-BW-Tr classification of Cullasaja River and Mill Creek in the central developed portion of Highlands does not appear to adequately protect these streams from urban impacts, based on their existing degraded condition. However, most oft e development in this area pre -dates the Water Supply Watershed and Trout Stream Protection rules by decades, and the protective measures imposed by those rules were never intended to undo existing riparian damage. Impacts of future development under the existing rules would not be as damaging as were past development practices. ***** The second section, "Stormwater," refers to "few requirements that appear to provide protection to water resources and aquatic habitat." The DWQ should be reminded that the Town has enforced a local Soil Erosion Ordinance since 1984. The Ordinance features more stringent requirements than the State's model ordinance, including a minimum 3000 SF required for a Land Disturbing Permit (instead of 40,000 SF), and recentlyadopted requirements for full soil erosion plans for singlefamily homes constructed on steeper slopes, regardless of the size of the disturbed areas. Similarly, the Watershed Protection requirements, incorporated into the Zoning Ordinance in 1993, go far beyond the State's minimum guidelines, including a 50foot natural vegetative buffer in the Critical Area (instead of 30foot). The Ordinance also does not simply "grandfather" existing substandard lots, as permitted by the Watershed Protection Act and as is the case with most local govemments; instead, it strictly limits new "builtupon" development on these lots, in most cases to 12%. The Town is not aware of another local government with requirements as stringent as these. The Town has not yet been required to adopt Stormwater Protection requirements, but is working to mitigate possible stormwater impacts. The Town's Watershed Administrator, Engineer, and Planning staff recommend voluntary stormwater control efforts where applicable during the plan review process. The new Child DevelopmentCenter on Church Street has received a grant to "demonstration the Center to serve as an educational site" for stormwater treatment, despite its lack of proximity to streams. A $25,000 sewer system evaluation is being ticonducted by consulting engineers with W. K. Dickson Company to identify and correct stormwater discharges into the sanitary sewer system, and to map the sewer system using GIS technology. ***** The third section, "Stream Buffers," comments on natural vegetative buffers, which the Town enforces with respect to the Watershed Protection Act. The Highlands Watershed Ordinance permits clearing and re -planting of stream buffers provided that it complies with the local soil erosion ordinance. According to a 1993 staff memo regarding the Watershed Ordinance: "There is nothing in the regulations to prohibit gardening, landscaping, or other horticultural activities in the buffer; the definition refers to "natural or planted vegetation." The applicable Sections in Article 200 prohibit new development that constitutes "built -upon area" in the definition, such as buildings, driveways, patios, etc. "No new development is allowed in the buffer except for water dependent structures, as defined by this Ordinance, and public projects such as road crossings and greenways where no practical alternative exists. These activities should minimize builtupon surface area, direct runoff away from the surface waters and maximize the utilization of stormwater Best Management Practices." [Section 211.7(b)] One hundred percent of the Town's service area is protected by these vegetative buffers, as the entire Town (except for a small portion to the south and east) is located within a Public Water Supply Watershed, 95% of which is classified WS-III. No maps have been prepared of intermittent streams. However, voluntary buffer protection will be encouraged around such streams through the Town's stringent environmental review of all new projects by the Planning Board, Appearance Commission, Zoning Board, Town Engineer, and Watershed Administrator. RJGA Comment: The Highlands region receives exceedingly high rainfall and sustains base flows during dry weather in tiny streams with minimal drainage basin area (Giese and Mason, 1991). Consequently, Highlands has an unusually high density of perennial and intermittent streams, as indicated on soil survey maps (Thomas, 1996). According to Mr. Betz, prohibiting new development within 30 feet of intermittent streams would render many existing platted lots undevelopable and would pose a significant loss of property value and tax revenues to Highlands. The Town Commissioners would be unlikely to approve this measure. Increasing the required buffer width on perennial streams to 100 feet would have similar economic problems and meet similar opposition. The final section, "Other Comments," again refers to "new development accommodated by this VWVrP expansion," which has already been discussed. 2. NPDES UNIT -- Teresa Rodriguez. The growth rates cited should be welldocumented in the Preliminary Engineering Report, and are standard population projections based on data available. It should be pointed out, however, that the growth rate projections are also corroborated by the flow projections from the WWTP itself, which indicated a projected 1.5 MGD capacity. In addition, W. K. Dickson Company is working on a corroboration of this capacity based on projected demand, area by area, pursuant to an earlier sewer study. The areas in question, as discussed previously, are served by either septic systems or private package treatments plants. Town staff has had formal discussions with representatives from Highlands Falls Country Club, Wildcat Cliffs Country Club, and Cullasaja Club, but no letters of intent have been filed as of this date. Operational conditions of onsite systems should be well -documented in the Asheville Regional DENR office. There have been documented problems with the S. B. Association package treatment plant, including notices of violation and fines from the Asheville DENR office. We understand that the Highlands Falls Country Club package plant also received a notice of violation recently. The Preliminary Engineering Report should have adequately addressed the feasibility of reusing wastewater on golf courses. There are no "proposed"golf courses anywhere in the area, only existing golf courses already equipped with extensive irrigation systems. Highlands Country Club, the only golf course located in the Town limits, irrigates from Club Lake. All of the golf courses in the entire watershed, inside and outside of Town, were contacted and indicated that they were unwilling to use treated effluent for irrigation. 3. WILDLIFE RESOURCES COMMISSION -- Owen Anderson. The first page refers to endangered species such as the bog turtle. It is not clear how expansion of the VVWfP could "adversely impact a federally threatened species."Any wastewater collection lines proposed for the future (not part of this permit) would have to go through a permitting process, and the Town would certainly agree to contact the U. S. Fish & Wildlife Service if there were any endangered species affected. We are pleased that the WRC made reference to the tertiary treatment, the minimal impact of construction, and the benefit to aquatic life downstream. The Town regards itself as good stewards of the enviroment and feels that it has a special responsibility to the Cullasaja River. Tertiary treatment was proposed in order to maintain and improve water quality in the receiving river; it is that area, not the Upper Cullasaja above the WWfP, which will receive the impact from the discharge. Nevertheless, the letter claims that "the new infrastructure will provide a stimulus for new development that will result in increased land clearing, increased impervious surfaces, increased urban runoff, and unregulated construction in streams and riparian areas." This is simply not the case. As discussed earlier, the VWVfP will serve existing areas already subdivided; it will provide reliable, municipal sewer service rather than subservice septic systems or private package treatment plants. This is especially evident in developments like Highlands Country Club, Shelby Place, and Highlands Falls Country Club, which have been entirely subdivided for years and are served by private sewer; expansion of the municipal system to serve these areas by eliminating those private plants will simply replace unreliable sewer service with reliable sewer service. In other areas, such as Mirrormont subdivision, municipal sewer service would replace subsurface septic systems. And in providing sewer service to areas such as NC106, where documented septic system problems have existed for years, the project will have a beneficial impact on both aquatic life and public health. Clearing of land areas, limiting of impervious surfaces, and "unregulated" construction no ction in streams are strictly regulated or prohibited by both Town and County regulations. There "unregulated construction" in Highlands. It is unclear how expansion of the WVVTP would have any affect on the issues raised in the specific items listed in the letter: No. 1: New service areas which the Town would propose to develop would certainly be surveyed as part of the sewer line projects approved by the State. No. 2: No new development is proposed in any wetland or areas where there are endangered species. The amount of wetlands in the Highlands watershed is very small, and the Town recently adopted amendments of its Zoning Ordinance which would require approval by the U. y Corps of Engineers before construction on any residential lots whatsoever that are deemed wetlands. No. 3: Although the VWVTP is being expanded to serve new areas, these are areas which are already developed, many of them in subdivisions with other infrastructure already in places; incorporation of the package sewer treatment plant serving all of Highlands Falls Country Club, e.g., would require little more than a collection line from the plant to the nearest municipal sewer line, not extensive construction. Collection lines to these areas would be placed in the Capital Improvement Program as funding and necessity permit. No. 4: The VW TP is already equipped with standby power; it was the only facility which continued to operate during the Blizzard of 1996. No. 5: The Ordinance Regulating the Draining of Impoundments, enforced currently in both the Town and the County (the latter enforced through an interlocal agreement by the Town's Watershed Administrator), is not only a "good idea," it is a groundbreaking Ordinance that we understand is unique in the State. The 50 NTU standard was proposed by W. K. Dickson Company, and the Ordinance was reviewed by DENR's Asheville Regional Office. RJG&A Comment: The 50 NTU standard is the state-wide maximum turbidity standard, and is less stringent than the 25 NTU standard for HQW/ORW streams and the 10 NTU trout stream standard. These lower (more stringent) standards are not feasible to enforce due to sediment transport dynamics that occur when a pond is drained. Fine silt and organic particles accumulate over many years on the bed of a full pond, where little water movement occurs. As the pond is drained the water velocity at the bed surface increases, resuspending these fine particles, even if draining occurs very slowly. No. 6: As previously discussed, the Town's Watershed Protection regulations address stormwater runoff from residential development; natural vegetative buffers 50 feet in width in the Critical Area and 30 feet in width in the Balance of Watershed area are required throughout the Town. As to the guidelines which the WRC requests the Town to implement: 1. It would not be feasible in most cases to provide for the buffers indicated along perennial or intermittent streams (see previous discussion). In any case, construction of sewer lines is not proposed in proximity to any perennial streams, nor is any such construction proposed in the permit application. 2. Sewer lines are not proposed in stream buffer areas; they are generally installed along roads in Highlands. 3. The Town already regulates the removal of trees in commercial zoning districts, as authorized pursuant to Special Act of the Legislature enacted in 1986 (Chapter 828, House Bill 1469). No "construction corridors" are proposed as part of this permit. 4. There are no FEMA designated floodplains in Highlands, and thus the Town has no local . floodplain regulations. 5. Impervious surfaces are limited to 6% (in WS-II-CA), 12% (in WS-III-CA), or 24% (in WS-111- BW) on substandard Tots throughout the watershed under the Town's Watershed Protection regulations. 6. No roadway crossings are proposed as part of this permit. There are no projects involving bridges or culverts planned for any streams or associated wetlands in Highlands. 7. The Town enforces a local Soil Erosion and Sedimentation Ordinance, and has since 1984. The Ordinance contains all of the elements listed in (a) through (i), as well as the additional provisions discussed earlier.