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HomeMy WebLinkAboutNC0087751_Application_20020207IVOC 16') Amendment to Engineering Proposal and NPDES Permit Application for Linville Heights Avery County, North Carolina Prepared by: E I John T. Coxey . Consulting Engineering, P. A. ;;�0 ' ...... 53 Fox Chase Road West •'•h,N 7. 0� Asheville, North Carolina 28804 Project No. 20010 February, 2002 A. SUBSUFACE DISPOSAL SYSTEMS Although the project site consists of 215 acres, very little of this land is suitable for underground disposal such as septic tank/drain field systems, low-pressure pipe systems (LPP), or spray or drip irrigation. Comprehensive soil survey information has been obtained from the US Department of Agriculture Natural Resource Conservation Service in Avery County. This information describes the soil properties of the County and provides maps showing classifications of soils. A portion of the map that includes the location of the Linville Heights project is included herewith. There are five (5) soil classifications found on the project site: CrE — Crossnore-Jeffrey complex PaB — Pineola gravelly loam, 2-8% slopes PnC- Pineola gravelly loam, 8-15% slopes PnD-Pineola gravelly loam,15-25% slopes WtD-Whiteoak fine sandy loam, 15-30% slopes, very stony Each soil description and suitability for numerous parameters are included herein. Only one (1) soil type (PaB) is considered suited to poorly suited for septic tank and underground drain field systems and concerns are noted regarding the restricted permeability of these soils as well as a recommendation that deeper soils be used to possibly improve filter field performance. The remaining soil types (CrE, PnC, PnD, WtD) are classified poorly suited with concerns for steepness of slope, erodibility and permeability. A map delineating all soil areas is included in this Amendment. In the location where the moderately suitable soils are present, building construction will take place and there are potential sites for drilling potable water supply well(s) and construction of a water storage tank. This location is also a very small portion of the overall property, and is on one side of the property, which is several thousand feet from other developable portions of the property. It would not be feasible to use this Iand for subsurface disposal because of its location within the site and its use for construction, well sites, and storage tank considerations. B. SURFACE DISPOSAL SYSTEMS Spray irrigation and drip irrigation are not viable options for the reasons presented under the subsurface disposal evaluation above. Unsuitable soils are present over more than 90% of the site and only moderately suitable soils exist in the areas of the proposed development. 4- C. REUSE Reuse of treated wastewater effluent on this project could only be an option when used in conjunction with a biological treatment system approved under an NPDES permit. State requirements regarding reuse stipulate that effluent be tertiary quality. It is not evident at this time that tertiary limits will be set for discharge of 612200 gallons of treated effluent on this project. The project site has very limited areas where reclaimed water could be land applied. In addition, and since it is beyond the scope of this report to determine a rate of application, the rate may be such that it would be economically unsound to require the owner to provide the additional treatment components and distribution equipment necessary for reuse. CrE=Crossnore-Jeffrey complex, 30 to 50 percent slopes, very stony Seibng Landscape: Intermedate mountains in the central and northeast central part of the county Elevation range. 3,400 to 4,600 feet Landform: Mountain sideslopes and ridges Landform posidon. Sideslopes and ridgetops Shape of areas. Long and narrow or Irregularly shaped Size of areas. 5 to 1000 acres Crossnore soils and similar inclusions: 45 percent Jeffrey soils and similar inclusions: 40 percent Dissimilar Inclusions:15 percent Compost On Typical Profile Crossnore soils Surface -layer. 0 to 7 inches --dark brown gravelly sandy loam subsoil: 7 to 16 inches=yellowish brown gravelly sandy loam 16 to 22 inches4nwrdsh yellow gravelly sandy loam Underlying material. 22 WO inches=mullicolored gravelly loamy sand saprolite Bedrock 30 to 61 inches=soft weathered partially consolidated low-grade metasandstone bedrock Jeffrey soils Surface layer. 0 to 5 inches lack gravelly sandy loam 5 to 9 inches --dark brown gravelly sandy loam Subsoil. 9 to 20 inches=yeilowlsh brown gravelly loam Underlying material. 20 to 31 inches=yellowish brown gravelly sandy loam Bedrock 31 to 36 inches=hard unweathered, feldspathic sandstone Soil Properdes and Qualfffes Depth class. Crossnore=moderately deep; Jclfrey=modemtely deep Drainage class: Cmmore=Weil drained; Jeffrey=Somewhat excessively drained General texture class: Loamy PermeabiNT. Moderately rapid Depth to seasonal high water table: Greater than 6.0 feet below the soil surface Hazard of flooding: None Shrinkswell potential• Low Slope class. Steep Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erasion: Very severe Rock fragments on the surface. Widely scattered surface stones and cobbles that average about 10 to 24 inches in diameter and 3 to 25 feet apart Surface layer organic matter content Moderate to high Potential frost action: Moderate Parent materialResiduum affected by soil creep in the upper part, weathered from felsic and mafrc low-grade metamorphic rock Depth to bedrock: Crossnore=20 to 40 inches to soft bedrock; Jeffrey--20 to 40 inches to hard bedrock Minor Components: Dissimilar inclusions: • Whiteoak soils with more clay in the subsoil, and depth to bedrock more than 60 inches, in concave areas at the heads of drains, In drains, and on foot slopes • Spivey soils with a thicker dark surface layer, more rock fragments throughout the soil, and depth to bedrock more than 60 inches, in narrow drains and on foot slopes • Soils with depth to soft bedrock at greater than 40 inches, on smoother parts of the landscape • Soils with depth to hard bedrock at less than 20 inches, on nose slopes and near rock outcrops • Widely scattered areas of rock outcrops • Prominent summits or ridges at higher elevations that are windswept Similar inclusions: • Crossnore and Jeffrey soils with loam, fine sandy loam and coarse sandy loam surface texture in the fine earth fraction • Randomly scattered areas of Pineola soils with more clay in the subsoil and depth to soft bedrock at 20 to 40 inches as well as soils with more day in the subsoil and hard bedrock at 20 to 40 inches • Crossnore and Jeffrey soils which have a lighter colored surface layer or with a thinner dark surface layer than is usually seen with these soils • Crossnore and Jeffrey soils with extremely stony surface coverage Land Use Dominant Uses: Woodand Other Uses: Pasture, building site development, ornamentals, and fraser Ir production Agriculture! Devefopment Cropland Suitability. Unsuited Management concerns: This map unit is severely limited for crop production because of steepness of slope and erodibility. Another site should be selected with better suited soils. Pasture and Hayland Suitability: Suited to poorly suited to pasture; unsuited to hayland Management concerns. Equipment use, erodrbility, soil fertility, and rooting depth and droughtiness Management measures: • Steepness of slope limits equipment use • Preparing seedbeds on the contour or across the slope helps to reduce soil erosion and increases germination. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. • Moderately deep rooting depth may make soils in this map unit difficult to manage for pasture and hay crop production because of low available water. Orchard and Ornamental Crops Suitability: Suited to poorly suited to fraser fir production; Poorly suited to all other ornamentals Management concems: Equipment use, erodibility, sal fertility, ball and burlap harvesting, frost action, plant shape and rooting depth, and droughtiness Management measures. • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Soils in this map unit are difficult to manage for orchard or omamental crops because steepness of slope limits equipment use. • Establishing and maintaining sod between vows and on access roads helps to reduce the hazard of erosion. • Due to poor fertility of these soils, following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and is critical to maximize productivity. • Proper channelizaation of water away from and not into fields helps to control phytophona root disease • Avoiding ball and burlap harvesting during dry periods helps prevent fracture of the ball and separation of the soil from the roots caused by low moisture and minimal day content • Maintaining plant cover or using mach helps to reduce damage to roots caused by frost heaving. • The steepness of slope will affect the shape of ornamentals on the uphill side. • Moderately deep roofing depth makes soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. Woodland Suit&1hy Suited to poorly suited Potential for commercial species: Moderate to low for hardwoods Producfi * class: Crossnore=moderate to low for northern red oak; Jeffrey=low for northern red oak Management concerns: Equipment use, erodibility, seeding survival, windhrow hazard, and windswept conditions on small exposed areas Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent sal erosion. • Avoid areas that show signs of windswept conditions, for increased productivity. • Leaving a buffer zone of trees and shrubs ac#acent to streams helps to reduce siltation and provides shade for the aquatic habitat • Avoid grazing livestock in areas managed for woodland • Productivity is limited because of the limited rooting depth of these soils. • Productivity may be increased by periodically harvesting windthrown trees, which result from high winds and limited rooting depth. • Using improved varieties of eastern white One helps to increase productivity. • Replanting may be necessary on warm, south- to west -facing slopes because of reduced sal moisture. Planting when the soil is mast for extended periods helps to increase seeding survival. Urban Devefopnwrit Dwellings Suitability. Poorly suited Management concerns: Steepness of slope, erodibility, corrosivity, and depth to hard bedrock Management measures. • Designing structures on the contour with natural slopes or building on less sloping areas within the unit helps improve soil pemformance. • Drilling and blasting of hard rock or the use of special earth -moving equipment is needed to increase the sal depth may be needed on .Jeffrey soils. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to -concrete. • Installing permanent retaining walls helps to improve sal stability. Septic Tank Absorption Fields Suitability. Poorly suited Management concems. This map unit is severely limited for septic tank absorption fields because of steepness of slope and depth to bedrock. Another site should be selected with better suited soils. Contact the local Health Department for additional guidance. Local Roads and Streets Suitability.- Poorly suited Management concerns. Steepness of slope, erodibility, slippage, depth to rock, and frost heaving Management measures: • Designing roads on the contour and installing water control structures such as broad base clips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive sal erosion. • Blasting or special grading may be needed to construct roads on Jeffrey soils because of hard bedrock. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. Lawns and Landscaping Suitability: Poorly suited Management concerns: Steepness of slope, erodibility, droughtiness, large stones, soil fertility, frost action, and depth to bedrock Management measures: • Soils in this map unit are difficult to manage for lawns and landscaping because steepness of slope limits equipment use as well as most other uses. • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Removing larger stones and boulders and limiting the use of equipment to the larger, open areas help to improve the suitability of these soils. • Using lime, fertilizer, mulch, irrigation, and varieties adapted to droughty conditions helps to establish lawns and landscape plants. • Stockpile topsoil from disturbed areas and replace it before landscaping. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Moderately deep rooting depth may make these soils difficult to manage for lawns and landscaping especially if the soil has been disturbed. • If excavated material is to be used for landscaping, any soft bedrock will need to be crushed or removed. Interpretive Groups Land capability classification: Crossnore=Vlle; ,leffrey=Vlle Woodland ordination symbol: Crossnore=4R for northern red oak; Jeffrey=311 for northern reed oak PaB=Pinecla gravelly loan, 2 to 8 percent slopes Setting Landscape: Intermediate mountains in the central and northeast central part of the county Elevation range: 3,600 to 4,200 feet Landform: Mountain ridges Landform position: Ridgetops Shape of areas: Oblong to irregularly shaped Size of areas. 2 to 50 acres Pineola soils and similar incusiorw. 85 percent Dissimilar indusions:15 percent Composidon Typical Profile Surface layer. 0 to 7 inches=dark brown gravelly loam Subsoil. 7 to 20 inches=yellowish brown clay loam 20 to 26 inches=browrdsh yellow loam Underlying material. 26 to 32 indvs=brownish yellow and very pale brown gravelly loam saprolite Bedrock. 32 to 61 inches=multicolored, soft weathered, metasiltstone bedrock Soil Properties and Qualides Depth class: Moderately deep Drainage class: Well drained General texture class: Loamy PermeabiNy Moderate Depth to seasonal high water table. Greater than 6.0 feet below the soil surface Hazard of flooding. None Shrink -swell potential• Low Slope class. Gently sloping Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed , Hazard of water erosion. Moderate Surface layer organic matter content Moderate to high Potential frost action. Moderate Parent material., Residuum affected by soil creep in the upper part, weathered from felsic to mafic low-grade metamorphic rock Depth to bedrock 20 to 40 inches Minor Components Dissimilar inclusions: • Sails with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit • Soils with depth to bedrock at less than 20 inches scattered randomly throughout the map unit • Whiteoak soils that are colluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes Similar inclusions. • Pinola soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction • Pinola soils which have a lighter colored surface layer or with a thinner dark surface layer • Crossnore soils which have less day in the subsoil • Soils with depth to hard bedrock at 20 to 40 inches • Soils with depth to soft bedrock at 40 to 60 inches Land Use Dominant Uses. Fraser fir production, pasture, and hayland Other Uses: Ornamental crops, and woodland Agricultural Development Cropland Suitability: Well suited Management concerns: Erodibility, filth, soil fertility, herbicide retention, climate, and rooting depth and droughtiness Management measures: • Using resource management systems that include terraces" and diversions, crop residue management, striperopping, and contour Wage, help to control soil erosion and surface runoff and maximize the infiltration of rainfall. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep rooting depth of Pinola soils. Pasture and Hayland Suitability.. Well suited Management concerns: Erodibility, soil fertility, and rooting depth Management measures: • Preparing seecxeds on the contour when renovating pastures and establishing Seedbeds helps to prevent further sal erosion and increases gernination. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. • Moderately deep rooting depth of Pineola soils may limit the productivity for pasture and hay crop production because of low available water Orchard and Ornamental Crops Suitability. • Well suited Management conoems: Erodibility, root disease, herbicide retention, ball and burlap harvesting, frost action, soil fertility, and rooting depth Management measures: • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthom, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Proper channeiization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Soils in this map unit may retain soil applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Following lime and fertilizer recommendations from soil tests helps to Increase the availability of plant nutrients and maximize productivity. • Moderately deep rooting depth may make Pineda sobs in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. • Using supplemental irrigation and crop varieties adapted to droughty conditions helps to increase productivity. Woodland Suitability: Well suited Produciit* class: High for eastern white One Management concerns. Windthrow hazard Management measures. • Leaving a buffer zone of trees and shrubs adacent to streams helps to reduce siltation and provides shade for the aquatic habitat. • Avoid grazing livestock in areas managed for woodland • Avoiding logging operations during periods when the soil is saturated helps to prevent nutting of the sal surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastern white One helps to increase productivity. • Productivity may be limited on areas of Pineolasoils because of the limited rooting depth of these soils. • Replanting may be necessary on warm, south- to west facing slopes because of reduced soil moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist -for extended periods helps to increase seeding survival. Urban Development Dwellings Suitability: Well suited Management concerns. Corrosivity, and depth to soft bedrock Management measures: • Designing structures to conform with natural slopes helps to improve sal performance. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using coirosion*resistant materials helps to reduce the risk of damage to concrete. • The soft bedrock underlying the sails in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. Septic Tank Absorption Fields Suitability. • Suited to poorly suited Management concerns: Permeability and depth to soft bedrock Management measures. • Contact the local Health Department for guidance on sanitary facilities. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. • Raking trench walls helps to reduce sealing of sal pores which may occur during the excavation of septic tank absorption fields. • This map unit is difficult to manage for septic tank absorption fields because these soils are moderately deep to soft bedrock. Locating and using the deeper soils within the area may improve filter field performance. Local Roads and Streets Suitability. Well suited Management concerns: Depth to bedrock and frost action Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. Lawns and Landscaping Suitability: Well suited Management concerns: Erodibility, frost action, sal compaction, soil fertility, and depth to soft bedrock Management measures. • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. • Using lime, fertilizer, mulch, and irrigation helps to establish lawns and landscape plants. • Moderately deep rooting depth may make Pineaa soils difficult to manage for lawns and landscaping especially if the soil has been disturbed. • If excavated material is to be used for landscaping, any soft bedrock will need to be gushed or removed. • Using supplemental irrigation and varieties adapted to droughty conditions helps to increase the survival of grasses and landscaping plants. lntmpr+edve Groups Land capability classiric afion: vile Woodland ordination symbol:10D for eastern white pine PnC=Pineola gravelly loam, 8 to 15 percent slopes, stony Setting Landscape: Intermediate mountains in the central and northeast central part of the aunty Elevagon range: 3,400 to 4,400 feet Landform: Mountain ridges and sideslopes Landform position: Ridgetops and upper sideslopes Shape of areas.- Irregularly shaped Size of areas. 2 to 150 acres Composition Pineola soils and similar inclusions: 85 percent Dissimilar inclusions:15 percent Typical Profile Surface layer. 0 to 7 inches --dark brown gravelly loam Subsoil. 7 to 20 inches=yellowish brown clay loam 20 to 26 inches=brownish yellow loam Underlying material: 26 to 32 inches=brownish yellow and very pale brown gravelly loam saprolite 32 to 61 inches=multicolored, soft weathered, metasiltstone bedrock Soil Properties and Qualifies Depth dam Moderately deep Drainage class: Well drained General texture class: Loamy Penneabiky. Moderate Depth to seasonal high water table. Greater than 6.0 feet below the soil surface Hazard of flooding., None Shrink -swell potential: Low Slope class. Strongly sloping Extent of erasion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion: Severe Rock fragments on the surface: Widely scattered surface stones and cobbles that average about 10 to 24 inches in diameter and 25 to 75 feet apart Surface layer organic matter content Moderate to high Potential frost action: Moderate Parent material: Residuum affected by sal creep in the upper part, weathered from felsic to mafic low-grade metamorphic rock Depth to bedrock: 20 to 40 inches Minor Components Dissimilar indusions: • Soils with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit • Soils with depth to soft or hard bedrock at less than 20 inches on shoulder slopes and scattered randomly throughout the map unit • Whiteoak soils that are colluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes • Randomly scattered areas of rock outcrop Similar inclusions. • Pinola soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction • Pinola soils which have a lighter colored surface layer or with a thinner dark surface layer • Crossnore soils which have less day in the subsoil • Soils with depth to hard bedrock at 20 to 40 inches • Soils with depth to soft bedrock at 40 to 60 inches Land Use Dominant Uses: Woodland, fraser fir production, ornamentals Other Uses: Pasture and Wand, and'building site development Agricultural Development Cropland Suitability. Suited Management concems. Erod ability, filth, herbicide retention, climate, and rooting depth and droughtiness, and soil fertility Management measures. • Using resource management systems that include contour farming, conservation tillage, crop residue management, striperopping, winter cover crops, and crop rotations which include grasses and legumes helps to reduce soil erosion, maximize rainfall infiltration, increase available water, and improve soil fertility. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and Increases rainfall Infiltration. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep rooting depth of Pinola soils. Pasture and Hayland Suitability: Well suited Management concerns: Equipment use, erodibility, herbicide retention, and rooting depth and droughtiness, and soil fertility Management measures: • Preparing seedbeds on the contour when renovating pastures and establishing seedbeds helps to prevent further soil erosion and increases germination. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. Orchard and Ornamental Crops Suitabift.. Suited Management concerns: Erodibility, root disease, frost action, soil fertility, herbicide retention, rooting depth, and ball and burlap harvesting Management measures.- - Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • Soils in this map urdt may retain sal applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. • Moderately deep rooting depth may make Pinola soils in this map unit difficult to manage for ornamental and orchard crops because of law available water and windthrow hazard. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. • Avoiding bail and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Using supplemental imgation and crop varieties adapted to droughty conditions helps to Increase productivity. Woodland Suifabli ty.• Well suited Productivity class: High for eastern white One Management eoncems: Erodibility, equipment use, seeding survival, and windthrow hazard Management measures: • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent soil erosion. • Leaving a buffer zone of trees and shrubs adfacent to streams helps to reduce siltation and provides shade for the aquatic habitat. • Avoid grazing livestock in areas managed for woodand. • Avoiding logging operations during periods when the soil is saturated helps to prevent rutting of the soil surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastern white pine helps to increase productivity. • Productivity may be limited on areas of Pinola soils because of the limited rooting depth of these soils. • Replanting may be necessary on warn, south- to west -facing slopes because of reduced soil moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist for extended periods helps to increase seeding survival. Urban Development Dwellings Suitability: Suited Management concems. Steepness of slope, erodlibiiity, corrosivity, and depth to bedrock Management measures. • Designing structures to conform with natural slopes helps to improve soil performance. • Vegetating disturbed areas and using erosion control structures such as sectiment fences and catch basins helps to keep eroding sal on site. • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to concrete. • The soft bedrock underlying the soils in this map unit does. not require special equipment for excavation but is difficult to revegatete or to pack if used in fill slopes. Septic Tank Absorption Fields Suitability. Pooriy suited Management concerns: Depth to soft bedrock, permeability and steepness of slope Management measures: • Contact the local Health Department for guidance on sanitary facilities. • This map unit is difficult to manage for septic tank absorption fields because the dominant soils are moderately deep to soft bedrock. • increasing the size of septic tank absorption field helps to improve performance • Raking trench wails helps to reduce sealing of soil pones which may occur during the excavation of septic tank absorption fields. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. Local Roads and Streets Suitabilit .. Suited Management concerns. Depth to bedrock, frost action, erodibility, and steepness of slope Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto III slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. Lawns and Landscaping Suitability: Suited Management concerns: Steepness of slope, erodibility, soil fertility, frost action, and soil compaction Management measures: • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using lime, fertilizer, mulch, imgation, and varieties adapted to droughty conditions helps to establish lawns and landscape plants. • Using mach helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. lnterpredve Groups Land capability classification: iVe Woodland ordination symbol.10D for eastern white pine PnD=Pineola gravelly loam,15 to 25 percent slopes, stony Setting Landscape: Intermediate mountains in the antral and northeast central part of the county Elevation range: 3,400 to 4,600 feet Landform. Mountain ridges and slopes Landform position: Ridgetops and upper sideslopes Shape of areas: Irregulady shaped Size of areas. 2 to 275 acres Pineola soils and similar inclusions: 85 percent Dissimilar inclusions:15 percent Composition Typical Profile Surface layer. 0 to 7 inches --dark brown gravelly loam Subsoil: 7 to 20 inches --yellowish brown clay loam 20 to 26 inches=bmdsh yellow loam Underlying material. 26 to 32 inches=brownish yellow and very pale brown gravelly loam saprolite 32 to 61 inches --multicolored, soft weathered, metasiltstone bedrock Soil Properties and Qualities Depth class. Moderately deep Drainage Bass: Well drained General texture class: Loamy Permeability.' Moderate Depth to seasonal high wafer table: Grater than 6.0 feet below the soil surface Hazard of flooding. None Shrink -swell potential. • Low Slope dam Moderately steep Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion: Very severe Rock fragments on the surface: Widely scattered surface stones and cobbles that average about 10 to 24 inches in diameter and 25 to 75 feet apart Surface layer organic matter content Moderate to high Potential frost action: Moderate Parent material: Residuum affected by soil creep in the upper part, weathered from felsic to ma tic low-grade metamorphic rock Depth to bedrock. 20 to 40 inches Minor Components Dissimilar inclusions: • Soils with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit • Soils with depth to soft or hard bedrock at less than 20 inches on shoulder slopes and scattered randomly throughout the map unit • Whiteoak soils which are colluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes • Randomly scattered areas of rock outcrop Similar inclusions: • Pineoia soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction • Pineola soils which have a lighter colored surface layer or with a thinner dark surface layer • Crossnore soils which have less day in the subsoil • Soils with depth to hard bedrock at 20 to 40 inches • Soils with depth to soft bedrock at 40 to 60 inches Land Use Dominant Uses. Woodland, fraser fir production, ornamentals Other Uses: Pasture and hayland, and buildng site development Agricultural Development Cropland Suitability: Poorly suited Management concerns: Steepness of slope, erodibility, filth, herbicide retention, climate, and rooting depth and droughtiness, and soil fertility Management measures: • This map unit is difficult to manage for cultivated crops because the slope limits the use of equipmnet • Using resource management systems that include contour farming, conservation tillage, crop residue management, striperopping, winter cover crops, and crop rotations which include grasses and legumes helps to reduce sal erosion, maximize rainfall infiltration, increase available water, and improve soil fertility. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Avoiding Wage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Soils in this map unit retain sal applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep rooting depth of Pinola soils. Pasture and Hayland Suitability: Suited to pasture; suited to poorly suited to Wand Management concerns. Equipment use, erodibility, herbicide retention, and rooting depth and droughtiness, and soil fertility Management measures. • Steepness of slope may limit equipment use on steeper areas when harvesting hay crops. • Preparing seedbeds on the contour when renovating pastures and establishing seedbeds helps to prevent further soil erosion and increases germination. . • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. Orchard and Ornamental Crops Suitability. Suited Management concerns: Erodibility, root disease, frost action, soil fertility, herbicide retention, rooting depth, and ball and burlap harvesting Management measures. • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • Soils in this map unit may retain soil applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. - Moderately deep rooting depth may make Pineola soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Using supplemental irrigation and crop varieties adapted to droughty conditions helps to increase productivity. Woodland Suitability: Suited Productivity class: High for eastem white pine Management concerns: Erodbility, equipment use, seeding survival, and windthrow hazard Management measures: • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent soil erosion. • Leaving a buffer zone of trees and shrubs a4acent to streams helps to reduce siltation and provides shade for the aquatic habitaL • Avoid grazing livestock in areas managed for woodland. • Avoiding logging operations during periods when the soil is saturated helps to prevent rutting of the soil surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastern white One helps to increase productivity. • Productivity may be limited on areas of Pinola soils because of the limited rooting depth of these soils. • Replanting may be necessary on warn, south- to west -facing dopes because of reduced soil moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist for extended periods helps to increase seedling survival. Urban Development Dwellings Suitability.Suited to poorly suited Management concems: Steepness of slope, erodbility, comosivity, and depth to.bedrock Management measures. • Designing structures to conform with natural slopes helps to improve soil performance. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to concrete. • The soft bedrock underlying the soils in this map unit does not require special equipment for excavation but is difficult to revegatate or to pack if used in fill slopes. Septic Tank Absorption Fields Suitability: Poorly suited Management concerns: Depth to soft bedrock, permeability and steepness of slope Management measures. • Contact the local Health Department for guidance on sanitary facilities. • This map unit is difficult to manage for septic tank absorption fields because the dominant soils are moderately deep to soft bedrock. • Increasing the size of septic tank absorption field helps to improve performance • Raking trench walls helps to reduce sealing of soil pores which may occur during the excavation of septic tank absorption fields. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. Local Roads and Sbwb Suitability: Suited Management concerns. Depth to bedrock, frost action, erodbility, and steepness of slope Management measures: • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and culverts helps to maintain road stability. Avdding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. Lawns and Landscaping Suitability: Suited to poorly suited Management concerns: Steepness of slope, erodibility, soil fertility, frost action, and soil compaction Management measures: • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. • Using lime, fertilizer, mulch, irrigation, and varieties adapted to droughty conditions helps to establish lawns and landscape plants. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiding heavy equipment use on areas to be landscaped helps to prevent sal compaction. lnterpredv a Groups Land capability classrfrcafion: Me Woodland ordination symbol. IOR for eastern white one WtD=Whboak fine sandy loan 15 to 30 percent slopes, very stony Setting Landscape: Intermediate mountains in the central and northeast central part of the county Elevation range. 3,000 to 4,200 feet Landform: Coves, colluvial fans, and benches Landform position. Foot slopes and toe slopes Shape of areas. Irregular Size of areas: 2 to 30 acres Whiteoak soils and similar inclusions: 90 percent Dissimilar inclusions:10 percent Composition Typical Profile Surface layer. 0 to 9 inches --very dark grayish brown fine sandy loam Subsoil. 9 to 12 inches=dark yellowish brown fine sandy loam 12 to 30 inches=yellowish brawn clay loam 30 to 55 inches=yellowish brown loam 55 to 62 inches=yellowish brown loam Soil Properties and Qualities Depth dass: Very deep Drainage dam Well drained General texture class: Loamy Permeability. Moderate Depth to seasonal high wafer table: Greater than 6.0 feet below the sal surface Hazard of flooding: None Shrink -swell polentiat Low Slope dam Moderately steep Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion: Very severe Surface layer organic matter content Moderate to high Potential frost scion: Moderate Special climatic conditions: Subject to slow air drainage allowing for late spring and early fall frost Parent material: Colluvium derived from felsic to mafic low-grade metamorphic rock Depth to bedrock Greater than 60 inches Other distinctive properties. Random areas of seeps and springs Minor Components Dissimilar inclusions. • Soils with more rock fragments in the subsoil, in drainageways as well as occurring randomly • Somewhat poorly drained Cullowhee soils that are loamy in the upper part and 20 to 40 inches to strata high in rock fragments, along stream channels Similar inclusions: • Whiteoak soils with sandy loam or loam surface texture • Whiteoak soils with surface layers that have less organic matter, and lack the thick dark surface layer • Staffer soils that rarely flood for very brief duration, along stream channels Land Use Dominant Uses. Pasture, hayland, woodland Other Uses. Fraser fir production and ornamental crops Agricultural Development Cropland Suitability.Poorly suited Management concerns: Erodibility, steepness of slope, filth, sal fertility, herbicide retention, and climate Management measures. • Solis in this map unit are difficult to manage for cultivated crops because steepness of slope limits equipment use. • Using resource management systems that include contour farming, conservation tillage, crop residue management, striperopping, winter cover crops, and crop rotations which include grasses and legumes helps to reduce soil erosion, maximize rainfall infiltration, increase available water, and improve soil fertility. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Soils in this map unit retain sal applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. Pasture and Hayland Suitability: Suited to pasture; suited to poorly suited to hayland Management concerns. Equipment use, erodibility, herbicide retention, and soil fertility Management measures. • Steepness of slope may limit equipment use on steeper areas when harvesting hay crops. • Preparing seedbeds on the contour or across the slope helps to reduce soil erosion and increases germination. • Fencing livestock from creeks and streams helps to prevent streambank erosion and sedimentation. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. Orchard and Ornamental Crops Suitability., Suited Management concerns. Erodibility, steepness of slope, climate, root disease, ball and burlap harvesting, frost action, herbicide retention, and sal fertility, Management measures. • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • When planting fraser fir, avoid toe slope and foot slope positions on the landscape in this map unit. Also avoid drains, drainways, concave, and depressional areas where water would concentrate for prolonged periods of time. These areas are more susceptible to phytophthora root disease. • Slow air drainage may allow late spring frost to damage new growth in some years. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Using plant applied herbicides increases effectiveness as compared to soil applied herbicides which are tied -up by organic matter. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. Woodland Suitah 14.Suited Potential for commerdal spedes. Moderately high for cove hardwoods Productivity dam Moderately high for yellow -poplar Management concems: Steepness of slope, erodibility, seedling survival, and herbicide retention Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent sal erosion. • Leaving a buffer zone of trees and shrubs adjacent to streams helps to reduce siltation and provides shade for the aquatic habitat. • Avoid grazing livestock in areas managed for woodland. • These soils are best reforested by managing for natural regeneration of hardwoods or planting improved varieties of Eastern white pine. • Replanting may be necessary on warm, south- to west: facing slopes because of reduced soil moisture. Planting when the soil is mast for extended periods helps to increase seedling survival. • Soil applied herbicides are retained due to herbicide -organic matter binding which may damage tree seedlings when cropland is converted to woodland. Urban Development Dwellings Suitability: Suited to poorly suited Management concerns. Erodibility, steepness of slope, seeps and springs, stones and boulders, and corrosivity Management measures. • Vegetating disturbed areas and using erosion control structures such as sedment fences and catch basins helps to keep eroding soil on site. • Designing structures that conform to the natural slope helps to improve soil performance. • Installing a subsurface drainage system around foundations helps to intercept water from seeps and springs. • Using corrosion -resistant materials helps to reduce the risk of damage to concrete. • Large stones and boulders may be encountered during excavation. Septic Tank Absorption Fields Suitabilo: Poorly suited Management concerns: Steepness of slope, restricted permeability and, seeps and springs Management measures. • Contact the local Health Department for guidance on sanitary facilities. • Increasing the size of septic tank absorption field helps to improve performance. • Raking trench walls helps to reduce sealing of soil pores which may occur during the excavation of septic tank absorption fields. • Excavations may cut into seeps and springs. These areas should be avoided. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. Local Roads and Streets Suitability: Suited Management ooncems. Steepness of slope, low strength, erodibility, frost action, and seeps and springs Management measures: • incorporating sand and gravel and compacting roadbeds helps to improve soil strength. • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • Intercepting and diverting underground water from seeps and springs helps to stabilize cut and fill slopes. Lawns and Landscaping Suitability., Suited to poorly suited Management concerns. Steepness of slope, erodibility, soil compaction, frost action, herbicide retention, large stones and boulders, climate, and soil fertility Management measures: • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Using plant applied herbicides increases effectiveness as compared to soil applied herbicides which are tied -up by organic matter. • Removing the large stones and boulders and limiting the use of equipment to the larger, open areas help to improve the suitability of these soils. • Slow air drainage may allow late spring frost to damage new growth in some years. • Using lime, fertilizer, mulch, and irrigation helps to establish lawns and landscape plants. • Stockpile topsoil from disturbed areas and replace it before landscaping. Interpretive Groups Land capability classification: Me Woodland ordination symbol., 7R for yellow -poplar rS i iYL yjo 97E '� �t \�.:� �J � 68C � 6g0 i` 9 • qt• �� ; .�!' IVE` •y ,' tt IUD T%t � a �G�E " R y b9e is � 4T I c 30 Ile A ? lay t"t pa ,f leg OD t /Co !o!�•k 8�95.._'���~a'.i � , ^ is � '-S ' r'<e'C '� J ' f �.� , `��;. fi t , 5"CF IpIL'r 160b r H j t _ eJ.. e,: f fr•. x`1 ,_ g �;-}<� � � � .•, � .rt �, �.'>,ie ` � :Qx ,,.:� t r� � Jam. �;�` •qr,.. ��,�}r•' .�., ' t'.: • � r 'r i' 14 l,r �t 'M.,,,.� S1Ci;. s ,� � t e' ,;^Ty"M" ,P .�.. -_- 7 ,••ty,",+•, xn:.. .. {, y ti: Iykri3'y>`F�., m•!y.r U. S. Department of Agriculture T Soil Survey Field Sheet Natural Resources Conservation Service N - 1" = 1000' Avery County, North Carolina Cooperating with Approximate Scale Advance Copy - Subject To Change State Agricultural Experiment Station Survey has not been compere no' ca'Fem!eo USDA. mics - fort worth, Terms Names may be changed and areas may be co—,,1, : Engineering Proposal and NPDES Permit Application for Linville Heights Avery County, North Carolina — Prepared by: John T. Coxey Consulting Engineering, P. A. 53 Fox Chase Road West Asheville, North Carolina 28804 Project No. 20010 — Telephone: 828-645-4046 Fax: 828-658-1304 Revised February, 2002 — r M3 v0�' FNGINF.E Table of Contents M introduction Project Wastewater Flow Characteristics Waste Treatment Disposal Options Alternate 1 Alternate 2 Alternate 3 Discussion of Alternatives Description of Proposed Treatment Works Cost Estimates Location Maps NPDES Permit Application Financial Qualifications Addendum to Engineering Proposal MM M Page 1 2 3 4 5 6 7 9 10 14 M INTRODUCTION Linville Heights is a proposed single-family and multi -family residential RW development in Avery County, North Carolina situated on N.C. Highway 181 between the Town of Newland to the west and the Linville community to the east. The proposed site is approximately 215 acres and is predominantly wooded mountainous terrain at this time. Elevations on the site range from elevation 3850 at the lowest point to approximately 4425 at the highest point. The current master plan for the project calls for approximately 130 single-family lots, which would be served by a private water system and would utilize septic tanks and drain fields for wastewater disposal. The remaining areas of development would be M" dedicated to high -density patio, homes and multi -family use. These areas would also be served by a private water system and an NPDES Permit would be applied for to discharge treated wastewater from a wastewater treatment facility on the project site serving the high -density development only. It is only the high -density development, which is under consideration and discussion within this Engineering Proposal. "o A discussion of the proposed treatment alternatives and an NPDES Permit Application is included as part of this Engineering Proposal. -1- W r r r F, PROJECT WASTEWATER FLOW CHARACTERISTICS Wastewater from the proposed project would be 100% domestic in nature with an expected BOD of approximately 200 mg/l and TSS of 200 mg/l. Flow would come from 170 three (3) bedroom multi-family/patio home units. Based on North Carolina Division of Water Quality standards, a total flow of 61,200 gallons per day (gpd) could be expected. There will be approximately 130 single-family lots in the project, however wastewater flows from this area of the development would be disposed of by conventional septic tanks and drain fields for each lot. It is the purpose of this report to present the waste treatment and disposal options available for the waste (61,200GPD)tgenerated by the multi-family/patio homes development only. IM i 7p 3 OIZ 132X(� s) cn"V o� Zvi v�F% WASTE TREATMENT AND DISPOSAL OPTIONS oft There are three (3) alternatives for treatment and disposal of wastewater from the multi-family/patio homes development at Linville Heights. They are as presented below. am Alternate 1 MM Wastewater Pump Station and Gravity Sewer to Town of Newland collection OR, system. Alternate 2 no On -site Wastewater Treatment Plant and Gravity Effluent Line to Linville River. Alternate 3 Septic Tanks and Drain Fields for Entire Project No A description of each alternative is presented herein. FM MM to f" -3- fm ALTERNATE NO. 1 This alternative would consist of constructing a wastewater pumping station on the Linville Heights project site, pumping through a force main approximately 2,000 L.F. and constructing 10-inch and 8-inch gravity sewer lines to the Town of Newland collection system. The majority of the gravity line would be 10-inch diameter since the line would extend over 2 miles from the existing Newland collection system. A total of approximately 15,000 L.F. of gravity line would be constructed along Kentucky Creek across private property, necessitating obtaining numerous private easements, which would not only be very costly, but would possibly take several years to obtain. In addition, the Town is presently under a moratorium for new sewer services until the Town's wastewater treatment plant is upgraded and expanded. The Town has applied for funding for this project, however it is anticipated that the new plant upgrade and expansion is 2 to 3 years from being on line and able to accept flow from the Linville Heights project. Because of the time constraints with obtaining easements and the Newland wastewater plant expansion, this alternative is not deemed to be the most feasible project for the Linville Heights project. ME (Is.__�C iNdt4NeJ �/I�� ZUDy, lav16 60"cJ{;06� CfP(�� ALTERNATE This alternate would consist of constructing a wastewater treatment plant on the Linville Heights project site and constructing an 8-inch effluent outfall line to the Linville River just west of the Linville community. The majority of the outfall line could be constructed in DOT right-of-way, however several private easements would have to be .r acquired to discharge to the Linville River. Additionally an NPDES Discharge Permit would have to be acquired for discharge to the Linville River. -5- ALTERNATE 3 This alternative would consist of providing individual septic tanks and drain fields for the multi-family/patio homes development of Linville Heights. e cu=jItlyplanned density of a ,d„gLvelopment is such that it is not feasible to provide individual disposal systems in this area. The project would have to be scaled down significantly from the 170 planned three -bedroom units to approximately 25 to 30 units. It is the high -density portion of the project, which will be constructed initially to make development of the remainder of the project financially feasible. The Linville Heights financial plan is of course predicated on building the entire 70nulti- family/patio home units. r 0 ., M DISCUSSION OF ALTERNATIVES Alternates I and 2 pertain to treatment of flows from Linville Heights by pumping and construction of gravity lines to the Town of Newland or by construction of a wastewater plant and effluent discharge to the Linville River, re pectively. - Because of the time frame involved in expansion of the Town of Newland's wastewater facility and obtaining the necessary easements for constructing gravity lines, Alternate 1 is not feasible for Linville Heights. Alternate 2 is a feasible option, and an NPDES Permit would be required for discharge to the Linville River. Accordingly an NPDES Application requesting a discharge to the Linville River is included in this report Alternate 3, while being the less capital cost option, would result in a scaled down project for Linville Heights and would severely impact further development of the -7- project. The construction of the multi-family/patio homes area is necessary for financing the remaining single family areas of the development. The planned 170 units would be reduced to 30 units to provide adequate land area to facilitate construction of septic tanks and drain fields. The reduction of 140 units would result in a drop in gross sales of over 34 million dollars over the course of the project and would limit further development. It .� is for this reason that Linville Heights is seeking a discharge permit for treated effluent to Y be discharged to the Linville River. While it is not within the scope of this proposal to determine the affects of a concentration of septic systems on groundwater in the area, it is relevant to point out that treatment technology exists to produce an effluent which is of equal or greater quality than the waters to which it is discharged. Linville Heights fully anticipates that stringent effluent discharge limits would be implemented, but realizes that there are treatment technologies available to meet these limits. Linville Heights is financially capable of providing the necessary treatment technology for a discharge permit. In .M DESCRIPTION OF PROPOSED TREATMENT WORKS P" The proposed wastewater treatment plant would be dual -train consisting of the me following components: am Flow equalization chamber with duplex equalization pumps Am Extended aeration chambers (61,200 gallon total) Duplex blower system for aeration Anoxic chamber and mixer for nitrogen limits r' Dual clarification units with airlift sludge return Sludge Holding Tanks Tertiary filter system with mud well chamber, backwash chamber and duplex Pumps UV disinfection chamber Standby power generator Ma The proposed treatment system described above can of course be modified as MR necessary to meet discharge parameters of an NPDES Permit. MW ., so MR 0 P"y r#A ALTERNATE COST ESTIMATE A cost estimate for each of the three alternates is presented in the following pages. -10- VA i ALTERNATE 1 CONSTRUCTION COST ESTIMATE UNIT TOTAL Aft ITEM QUANTITY UNITS COST COST 10" PVC Gravity Sewer 62000 L.F. $45.00 $2701000 am 10" DIP Gravity Sewer 6,000 L.F. $53.00 $3191,000 8" PVC Gravity Sewer 1,500 L.F. $40.00 $ 601000 8" DIP Gravity Sewer 11500 L.F. $50.00 $ 75,000 4" PVC Force Main 2,000 L.F. $15.00 $ 303000 Manholes 60 Ea. $12750 $1051000 .. Pump Station and Standby Power 1 Ea. $752000 $ 75,000 Total Estimated Construction Cost $9332000 Administration and Easements S� 75,000 Engineering Fees 1052000 Contingencies (10%) 93,300 Total Project Cost $122062300 fm -11- 0" A" P ALTERNATE 2 CONSTRUCTION COST ESTIMATE UNIT TOTAL �• ITEM QUANTITY UNITS COST COST Wastewater Treatment �» Plant 1 Ea $250V000 $2502000 Site work 1 L.S. 25,000 25,000 Yard Piping 1 L.S. 25,000 252000 Standby Power 1 L.S. 355000 351,000 Electrical 1 L.S. 202000 201P000 8-Inch DIP Gravity Outfall Line 2500 L.F. 50 1252000 Manholes 10 Ea 1,750 172500 Total Estimated Construction Cost $497,500 Administration Easements 301P000 Engineering Fees 511,000 Contingencies (10%) 49,750 Total Project Cost $6281>250 am -12- AM wo ALTERNATE 3 M" CONSTRUCTION COST ESTIMATE Ala TOTAL am ITEM UNITS QUANTITY COST COST Septic Tank & Drain field 30* Ea. $31000 $90,000 Total Construction Cost $90,000 Administration -0- Engineering Fees -0- Contingencies (10%) 9,000 Total Project Cost $992000 am I" no fm *Scaled down project from 170 to 30 multi -family units -13- ON an LOCATION MAPS Location maps for Alternates 1 and 2 are shown on the following pages. 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Mailing address of applicant/ persnittee: Facility Name Linville Heights w, Owner Name Linville Heights Limited Partnership Street Address P. O. Box 2290 City Banner Elk •• State North Carolina ZIP Code 28604 Telephone Number (828) 898-5888 Fax Number (828) 898-5999 e-mail Address N/A 2. Location of facility Producing discharge: am Name (If different from above) Same Facility Contact Person Dale Franklin am Street Address or State Road State Road 181 City / Zip Code Banner Elk County Avery on Telephone Number (828-) 898-5888 no 3. Reason for application: Expansion/Modification * Existing Unpermitted Discharge Renewal New Facility X * Please provide a description of the expansion/modification: N/A an 4. Description of the existing treatment facilities Pist all installed components with capacitiesj: N/A '� Page 1 of 2 Version 6" Fm NPDES PERMIT APPLICATION - SHORT FORM D To be filed only by dischargers of 100% domestic wastewater (< 1 MGD flow) S. Description of wastewater f check all that apply), No MM of Facility Generating Wastewater Industrial Number of Employees No Commercial Number of Employees Residential X Number of Homes 1 7 jJ School Number of Students/Staff MR Other Describe the source(s) of wastewater (example: subdivision, mobile home park, etc.): Subdivision-Multi-Family/Patio Homes 6. Number of separate wastewater discharge pipes (wastewater outfalls): One 7. If the facility has multiple discharge outfalls, record the sources) of wastewater for each ontfa& N/A S. Name of receiving stream(s) (provide a map showing the enact location of each outfall): Linville River we I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such information is true, complete, and accurate. 5 dC4am ,vX�.� Printed Name of Person Signing �/ • %00 Title • .2 90 Signature of Applicantz Da a Signed FAN North Carolina General Statute 143-215.6(bX2) provides that Any person who knowingly makes any false statement representation, or cert€tication In any application, record, report, plan, or other document fries or required to be maintained under Article 21 or regulations of the Environmental Management Commission Implementing that Article, or who falsifies, tampers with, or knowingly renders Inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Env€ronmenta€ ,., Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $10,000, or by Imprisonment not to exceed six months, or by both. (18 U.S.C. Sectron 1001 prov€des a punishment by a fine of not more than $10,000 or imprisonment not more than 5 years, or both for a similar offense.) W" Page 2 of 2 Version "9 IM LPNILLE HEIGHTS, L.P. P.O. Box 7369, Naples, R. 34102 941-6434211 P.O. Box 2290 Banner Elk, N. C 28604 ., 828-898-5888. February 4, 2002 am North Carolina Department of Environment And Natural Resources Division of Water Quality NPDES Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Re: Linville Heights NPDES Permit Application Avery County Dear Sir/Madaxn, This letter serves to certify that Linville Heights Limited Partnership is financially qualified to fund construction of a wastewater treatment facility at Linville �., Heights for treatment of 61,200 gallons per day of domestic sewage. Furthermore, as developers of Crooked Creek in Banner Elk, North Carol;ina, we have demonstrated previous compliance with federal and state laws, regulations and rules for protection of the environment. Sincerely, S. Dale Franklin, Vice President No am MM Amendment to Engineering Proposal and NPDES Permit Application :. for Linville Heights Avery County, North Carolina wo- we Prepared by: wo- John T. Coxey Consulting Engineering, P. A. 53 Fox Chase Road West Asheville, North Carolina 28804 Project No. 20010 iiq- February, 2002 wo- ?2293 ••.,h r. c ,,�,. a-/�" P0 z- A. SUBSUFACE DISPOSAL SYSTEMS MR Although the project site consists of 215 acres, very little of this land is suitable for underground disposal such as septic tank/drain field systems, low-pressure pipe systems (LPP), or spray or drip irrigation. Comprehensive soil survey information has been obtained from the US Department of Agriculture Natural Resource Conservation Service in Avery County. This information describes the soil properties of the County and provides �^ maps showing classifications of soils. am A portion of the map that includes the location of the Linville Heights project is MR included herewith. There are five (5) soil classifications found on the project site: CrE -- Crossnore-Jeffrey complex ON PaB — Pineola gravelly loam, 2-8% slopes PnC- Pineola gravelly loam, 8-15% slopes PnD-Pinola gravelly loam,15-25% slopes rM WtD-Whiteoak fine sandy loam, 15-30% slopes, very stony M" Each soil description and suitability for numerous parameters are included herein. Only one (1) soil type (PaB) is considered suited to poorly suited for septic tank and underground drain field systems and concerns are noted regarding the restricted permeability of these soils as well as a recommendation that deeper soils be used to possibly improve filter field performance. am 'AR The remaining soil types (CrE, PnC, PnD, WtD) are classified poorly suited with OW concerns for steepness of slope, erodibility and permeability. FM A map delineating all soil areas is included in this Amendment. In the location where the moderately suitable soils are present, building construction will take place and there are potential sites for drilling potable water supply well(s) and construction of a water storage tank. This location is also a very small portion of the overall property, and is on one side of the property, which is several thousand feet from other developable portions of the property. It would not be feasible to use this land for subsurface disposal because of its location within the site and its use for construction, well sites, and storage tank considerations. I" Mq No "M FM am B. SURFACE DISPOSAL SYSTEMS me Spray irrigation and drip irrigation are not viable options for the reasons presented under the subsurface disposal evaluation above. Unsuitable soils are present over more than 90% of the site and only moderately suitable soils exist in the areas of the proposed development. FM am am MR LZO 0" M" am 0" C. REUSE MM Reuse of treated wastewater effluent on this project could only be an option when used in conjunction with a biological treatment system approved under an NPDES permit. State requirements regarding reuse stipulate that effluent be tertiary quality. It is not evident at this time that tertiary limits will be set for discharge of 61,200 gallons of treated effluent on this project. The project site has very limited areas where reclaimed water could be land applied. In addition, and since it is beyond the scope of this report to determine a rate of application, the rate may be such that it would be economically unsound to require the owner to provide the additional treatment components and distribution equipment necessary for reuse. FM M fim V" L--] r r� CrE=Crossnom-Jeffrey complex, 30 to 50 percent slopes, very stony Seidng Landscape: Intermediate mountains in the central and northeast central part of the county am Elevadon range: 3,400 to 4,600 feet Landform: Mountain sideslopes and ridges Landform position: Sideslopes and ridgetops Shape of areas: Long and narrow or irregularly shaped MR Size of areas. 5 to 1000 acres I' Crossnore soils and similar inclusions: 45 percent Jeffrey soils and sirralar inclusions: 40 percent Dissimilar inclusions:15 percent 0" Composidon Typical Profile Crossnore soils Surface -layer. 0 to 7 inches=dark brown gravelly sandy loam Subsoil: 7 to 16 inches=yellowish brown gravelly sandy loam 16 to 22 inches --brownish yellow gravelly sandy loam Underlying material: 22 to 30 inches=muldcolored gravelly loamy sand saprolite FMA Bedroc*: 30 to 61 inches=soft weathered partially consolidated low-grade metasandstone bedrock Im Jeffrey soils Surface layer. 0 to 5 inches --black gravelly sandy loam 5 to 9 inches --dark brown gravelly sandy loam °" Subsoil. 9 to 20 inches=yellowish brown gravelly loam Underlying material. MR 20 to 31 inches=yellowish brown gravelly sandy loam Bedrock: 31 to 36 inches=hard unweathered, feldspathic sandstone go Soil Properties and Qualldes e. Depth dass: Crossnore=moderately deep, Jeffreymnoderately deep Drainage bass: Crossnore=Well drained; Jeffrey=Somewhat excessively drained General texture class: Loamy lip Permeability. Moderately rapid Depth to seasonal high water table: Greater than 6.0 feet below the soil surface Hazard of flooding. None Shrink -swell poterntial: Low Slope class: Steep Extent of erasion. Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion. Very severe am Rock fragments on the surface: Widely scattered surface stones and cobbles that average about 10 to 24 inches in diameter and 3 to 25 feet apart Surface layer organic matter content: Moderate to high Potential frost action: Moderate Parent material• Residuum affected by sal creep in the upperpart, weathered from felsic and mafic low-grade metamorphic rock Depth to bedrock: Crossnore=20 to 40 inches to soft bedrock; Jeffrey--20 to 40 inches to hard bedrock Minor Components: Dissimilar inclusions: • Whitsoak soils with more clay in the subsoil, and depth to bedrock more than 60 inches, in concave areas at the heads of drains, in drains, and on foot slopes • Spivey soils with a thicker dark surface layer, more rock fragments throughout the soil, and depth to bedrock more than 60 inches, In narrow gains and on foot slopes • Soils with depth to soft bedrock at greater than 40 inches, on smoother parts of the landscape • Soils with depth to hard bedrock at less than 20 inches, on nose slopes and near rock outcrops • Widely scattered areas of rock outcrops • Prominent summits or ridges at higher elevations that are windswept Similar inclusions: • Crossnore and Jeffrey soils with loam, fine sandy loam and coarse sandy loam surface texture in the fine earth fraction "' • Randomly scattered areas of Pineola soils with more clay in the subsoil and depth to soft bedrock at 20 to 40 inches as well as soils with more clay in the subsoil and hard bedrock at 20 to 40 inches • Crossnore and Jeffrey soils which have a lighter colored surface layer or with a thinner dark surface layer than is usually seen with these soils • Crossnore and Jeffrey soils with extremely stony surface coverage Land Use Dominant Uses: Woodand Other Uses: Pasture, building site development, ornamentals, and fraser fir production Agricultural Development Cropland Suitability.. Unsuited Management concerns: This map unit is severely limited for crop production because of steepness of slope and ON erodibi*. Another site should be selected with better suited soils. Pasture and Hayland SuitsbUltyr. Suited to poorly suited to pasture; unsuited to hayland Management concerns: Equipment use, erodibility, sal fertility, and rooting depth and doughtiness Management measures: • Steepness of slope limits equipment use • Preparing seedbeds on the contour or across the slope helps to reduce soil erosion and increases germination. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. • Moderately deep rooting depth may make soils in this map unit difficult to manage for pasture and hay crop production because of low available water. MR s Orchard and Ornamental Crops 14 Suitabilo.Suited to poorly suited to fraser fir production; Poorly suited to all other ornamentals Management concerns: Equipment use, erodibility, sal fertility, ball and burlap harvesting, frost action, plant shape and rooting depth, and droughtiness me Management measures. • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Soils in this map unit are difficult to manage for orchard or ornamental crops because steepness of slope liras equipment use. a • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Due to poor fertility of these soils, following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and is critical to ma)amize productivity. • Proper channelization of water away from and not into fields helps to control phytophora root disease • Avoiding ball and burlap harvesting during dry periods helps prevent fracture of the ball and separation of the soil from the roots caused by low moisture and minimal clay content �! • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • The steepness of slope will affect the shape of ornamentals on the uphill sidle. • Moderately deep rooting depth makes soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. Woodland Im Suitability.• Suited to poorly suited Potential for commercial species: Moderate to low for hardwoods Productivity lass: Crossnore=moderate to low for northem red oak; Jefhey=low for northem red oak oft Management concerns. Equipment use, erodibility, seeding survival, windthrow hazard, and windswept conditions on small exposed areas Management measures: • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts no and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent sal erosion. • Avoid areas that show signs of windswept conditions, for increased productivity. • Leaving a buffer zone of trees and shrubs adacent to streams helps to reduce siltation and provides shade for the aquatic habitat • Avoid grazing livestock in areas managed for woodland. • Productivity is limited because of the limited rooting depth of these soils. �. • Productivity may be increased by periodically harvesting windthrown trees, which result from high winds and limited rooting depth. • Using improved varieties of eastern white One helps to increase productivity. • Replanting may be necessary on warm, south- to west -facing slopes because of reduced soil moisture. Planting when the soil is mast for extended periods helps to increase seedling survival. Urban Development Dwellings Suitability. Poorly suited '" Management concerns. Steepness of slope, erodibility, corrosivity, and depth to hard bedrock Management measures. • Designing structures on the contour with natural slopes or building on less sloping areas within the unit helps improve soil performance. • Drilling and blasting of hard rock or the use of special earth -moving equipment is needed to increase the sal depth may be needed on Jeffrey soils. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. r-__i • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to -concrete. • Installing permanent retaining walls helps to improve sal stability. Septic Tank Absorption Fields Suitability Poorly sated Management concerns. This map unit is severely limited for septic tank absorption fields because of steepness of slope and depth to bedrock. Another site should be selected with better suited soils. Contact the local Health Department for additional guidance. Local Roads and Streets R. Suitability: Poorly suited Management concerns: Steepness of slope, erodbility, slippage, depth to rock, and frost heaving Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and - --culverts-helps to maintaln-road stability. Avoiding diversion of water directly onto fill slopes and vegetating out and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Blasting or special grading may be needed to construct roads on .Jeffrey soils because of hard bedrock. • The soft bedrock undWng the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. Lawns and Landscaping Suitabilfty.• Poorly suited Management concerns: Steepness of slope, erodibility, droughtiness, large stones, soil fertility, frost action, and depth to bedrock ., Management measures: • Soils in this map unit are difficult to manage for lawns and landscaping because steepness of slope limits equipment use as well as most other uses. • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. • Removing larger stones and boulders and limiting the use of equipment to the larger, open areas help to improve the suitability of these soils. �, • Using lime, fertilizer, mulch, irrigation, and varieties adapted to draughty conditions helps to establish lawns and landscape plants. • Stockpile topsoil from disturbed areas and replace it before landscaping. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Moderately deep rooting depth may make these soils difficult to manage for lawns and landscaping especially if the soil has been csturbed. • If excavated material is to be used for landscaping, any soft bedrock will need to be crushed or removed. fnterprebve Groups Land capability classibcalon: Crossnore=Vlle; Jeffrey=Vlle Woodland ordination symbol. Crossnore=4R for northern red oak; Jeffrey=3R for northern red oak no me am PaB=Plneola gravelly loam, 2 to 8 percent slopes Seidng Landscape: Intermediate mountains in the central and northeast central part of the county fm Elevation range: 3,600 to 4,200 feet Landfonn: Mountain ridges Landform position: Ridgetops Shape of areas: Oblong to Irregularly shaped am Size of areas: 2 to 50 acres no Pinola soils and similar inclusions: 85 percent Dissimilar inclusions:15 percent a Composidon Typical Profile Surface layer. 0 to 7 inches=dark brown gravelly loam a' Subsoil. 7 to 20 inches -yellowish brown clay loam 20 to 26 inches=brownish yellow loam Underlying material.• 26 to 32 inches=brownish yellow and very pale brown gravelly loam saprolite Bedrock 32 to 61 inches=multicolored, soft weathered, metasiltstone bedrock Soil Properties and Qualides Depth class. Moderately deep Drainage class. Well drained General texture class: Loamy Permeabilh)r. Moderate Depth to seasonal high water table: Greater than 8.0 feet below the soil surface Hazard of flooding: None Shrink -swell potential: Low a. Slope class. Gently sloping Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion: Moderate Surface layer organic matter content: Moderate to high Potential frost action: Moderate Parent materiat• Residuum affected by soil creep in the upper part, weathered from felsic to mafic low-grade metamorphic rock Depth to bedrock• 20 to 40 inches Minor Components so Dissimilar inclusions: • Soils with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit • Soils with depth to bedrock at less than 20 inches scattered randomly throughout the map unit as • Whiteoak soils that are coiluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes Similar incluslons: • Pinola soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction list .n • Pinola soils which have a lighter colored surface layer or with a thinner dark surface layer • Crossnore soils which have less day in the subsoil "" • Soils with depth to hard bedrock at 20 to 40 inches • Soils with depth to soft bedrock at 40 to 60 inches �. Land Use Dominant Uses: Fraser fir production, pasture, and hayland Other Uses: Ornamental crops, and woodland Agricultural DeWopmenl No Cropland Suitabili y: Well suited Management concerns: Erodibility, tilth, soil fertility, herbicide retention, climate, and rooting depth and droughtiness am Management measures: • Using resource management systems that include terraces* and diversions, crop residue management, shiperopping, and contour tillage, help to control soil erosion and surface runoff and maximize the infiltration of rainfall. ,�, • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep rooting depth of Pinola soils. am Pasture and Hayland Suitability: Well suited +�► Management concerns. Erodibility, soil fertility, and rooting depth Management measures: • Preparing seedbeds on the contour when renovating pastures and establishing seedbeds helps to prevent further soil erosion and increases germination. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. • Moderately deep rooting depth of Pinola soils may limit the productivity for pasture and hay crop production because of low available water "W Orchard and Ornamental Crops Suitability. Well suited go Management concems. Erodibility, root disease, herbicide retention, ball and burlap harvesting, frost action, soil fertility, and rooting depth Management measures: • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Proper channlization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Soils in this map unit may retain soil applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. so we • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. • Moderately deep rooting depth may make Pinola soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. �, • Using supplemental irrigation and crop varieties adapted to droughty conditions helps to increase productivity. Woodland as Suitability: Well suited Productivity class: High for eastern white One Management concerns. Windthrow hazard Management measures: • Leaving a buffer zone of trees and shrubs adacent to streams helps to reduce siltation and provides shade for the aquatic habitat. • Avoid grazing livestock in areas managed for woodland. • Avoiding logging operations during periods when the soil is saturated helps to prevent nutting of the soil surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastern white One helps to increase productivity. • Productivity may be limited on areas of Pineolasoils because of the limited rooting depth of these soils. • Replanting may be necessary on warm, south- to west -facing slopes because of reduced sal moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist for extended periods helps to increase seeding survival. .■t Urban Development Dwellings Suitability: Well suited Management concerns. Corrosivity, and depth to soft bedrock Management measures. • Designing structures to conform with natural slopes helps to improve soil performance. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using con osiorHasistant materials helps to reduce the risk of damage to concrete. • The soft bedrock underlying the soils in this map unit should not moire special equipment for excavation but are difficult to vegetate or to pack If used in fill slopes. an Septic Tank Absorption Fields Suitability., Suited to poorly suited Management concerns: Permeability and depth to soft bedrock no Management measures: • Contact the local Health Department for guidance on sanitary facilities. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. • Raking trench walls helps to reduce sealing of soil pores which may occur during the excavation of septic tank absorption fields. • This map unit is difficult to manage for septic tank absorption fields because these soils are moderately deep to soft bedrock. Locating and using the deeper soils within the area may improve filter field performance. Local Roads and Streets PM Suitability: Well suited Management concerns. Depth to bedrock and frost action Management measures. v. M r • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. me Lawns and Landscaping Suitabilh)r Well suited Management concerns: Erodibility, frost action, soil compaction, soil fertility, and depth to soft bedrock Management measures: - Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. �+ • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. • Using lime, fertilizer, mulch, and irrigation helps to establish lawns and landscape plants. - Moderately deep rooting depth may make Pineoia soils difficult to manage for lawns and landscaping especially if the soil has been disturbed. - If excavated material is to be used for landscaping, any soft bedrock will need to be crushed or removed - Using supplemental irrigation and varieties adapted to droughty conditions helps to increase the survival of grasses and landscaping plants. fnterpredve Groups Land capability classificafion. II le Woodland ordination symbol.1 OD for eastern white pine a, am am Oft Im Im w. PnC=Plneola gravelly loam, 8 to 15 percent slopes, stony setting Landscape: Intermediate mountains in the central and northeast central part of the county „q Elevation range. 3,400 to 4,400 feet Landform: Mountain ridges and sideslopes Landform position Ridgetops and upper sideslopes Shape of areas: Irregularly shaped a" Size of areas: 2 to 150 acres Composition on Pineola soils and similar inclusions: 85 percent Dissimilar inclusions:15 percent Typical Pm ite no surface layer. 0 to 7 inches=dark brown gravelly loam Subsoil: No 7 to 20 inches -yellowish brown clay loam 20 to 26 inches=browmsh yellow loam Underlying material, no 26 to 32 inches=browrush yellow and very pale brown gravelly loam saprolite 32 to 61 inches= multicolored soft weathered metasiltstone bedrock Soil Properties and Qualities 9" Depth class Moderately deep Drainage class: Well drained General texture class: Loamy Permeability: Moderate Depth to seasonal high water table: Greater than 6.0 feet below the sal surface Hazard of flooding: None Shdnk4well potential• Low Slope class: Strongly sloping Extent of erasion: Slight, less than 25 percent of the original surface layer has been removed �., Hazard of water erosion. Severe Rock fragments on the surface: Widely scaftered surface stones and cobbles that average about 10 to 24 inches in diameter and 25 to 75 feet apart Surface layer organic matter content Moderate to high Potential frost action: Moderate Parent material: Residuum affected by sal creep in the upper part, weathered from felsic to matic low-grade metamorphic rock Depth to bedrock. 20 to 40 inches Minor Components 14 Dissimilar inclusions: • Soils with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit • Soils with depth to soft or hard bedrock at less than 20 inches on shoulder slopes and scattered randomly throughout the map unit • Whiteoak soils that are colluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes • Randomly scattered areas of rock outcrop Similar inclusions: 0" No • Pinola soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction • Mineola soils which have a lighter colored surface layer or with a thinner dark surface layer �+ • Crossnore soils which have less day in the subsoil • Soils with depth to hard bedrock at 20 to 40 inches • Soils with depth to soft bedrock at 40 to 60 inches Land Use aft Dominant Uses: Woodland, fraser fir production, omamentals Other Uses: Pasture and hayland, andbuilding site development Agricultural Development AM Cropland AM Suitability: Suited Management concems. Erodibility, filth, herbicide retention, climate, and rooting depth and droughtiness, and soil fertility Management measures: "' • Using resource management systems that indude contour farming, conservation tillage, crop residue management, striperopping, winter cover crops, and cop rotations which include grasses and legumes helps to reduce sal erosion, maximize rainfall infiltration, increase available water, and improve soil fertility. go • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the sal surface helps to reduce clodding and crusting and increases rainfall infiltration. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. "" • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep roofing depth of Pinola soils. Pasture and Hayland so Suitabilo. Well suited Management concerns: Equipment use, erodibility, herbicide retention, and roofing depth and droughtiness, and soil no fertility Management measures: • Preparing seedxAs on the contour when renovating pastures and establishing seedx)ds helps to prevent further soil erosion and inaeases germination. am • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, of renovating pasture and hayland • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the sal surface. The we concentration of herbicides may be damaging to future crops. • Using rotational grazing, Implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. me Orchard and Ornamental Crops Suitability: Suited Management concerns: Erodbility, root disease, frost action, soil fertility, herbicide retention, roofing depth, and ball and burlap harvesting Management measures. • Proper management is the key to maximizing productivity and rrdnimizing plant stress and minimizing disease such as phytophthora, on these soils. ow • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. • Soils in this map unit may retain soil applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. • Moderately deep rooting depth may make Pineola soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and +�► maximize productivity. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Using supplemental laigation and crop varieties adapted to droughty conditions helps to increase productivity. Woodland ••, Suitability: Well suited Producti ity class: High for eastem white one Management concerns: Erodibility, equipment use, seeding survival, and windthrow hazard Management measures: "" • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent sal erosion. a., • Leaving a buffer zone of trees and shrubs a rent to streams helps to reduce siltation and provides shade for the aquatic habitat • Avoid grazing livestock in areas managed for woodand. • Avoiding logging operations during periods when the soil is saturated helps to prevent nutting of the soil surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastem white One helps to increase productivity. • Productivity may be limited on areas of Pinola soils because of the limited rooting depth of these soils. • Replanting may be necessary on warm, south- to west -facing slopes because of reduced sal moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist for extended periods helps to increase seeding survival. MI Urban Development Dwellings Suitability: Suited Management concerns: Steepness of slope, erodibility, corrosivity, and depth to bedrock Management measures: • Designing structures to conform with natural slopes helps to improve soil performance. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to concrete. • The soft bedrock underlying the soils in this map unit does not require special equipment for excavation but is difficult to revegatate or to pack if used in fill slopes. me Septic Tank Absorption Fields Suitability. Poorly suited am Management cconcems: Depth to soft bedrock, permeability and steepness of slope Management measures. • Contact the local Health Department for guidance on sanitary facilities. • This map unit is difficult to manage for septic tank absorption fields because the dominant soils are moderately deep go to soft bedrock. ON mm • Increasing the size of septic tank absorption field helps to improve performance No • Raking trench wails helps to reduce sealing of soil pones which may occur during the excavation of septic tank absorption fields. • Installing dstribution lines on the contour helps to improve performance of septic tank absorption fields. Ow Local Roads and Streets Suitablififr.• Suited Management concerns: Depth to bedrock, frost action, erodibility, and steepness of slope Management measures. • Designing roads on the contour and installing water control structures such as broad base clips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water erectly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. """ • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. No Lawns and Landscaping Suitability.• Suited Management concerns: Steepness of slope, erodibility, soil fertility, frost action, and sal compaction an Management measures. • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. ,,,� • Using lime, fertilizer, mulch, irrigation, and varieties adapted to droughty conditions helps to establish lawns and landscape plants. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. lnterpi►edwe Groups Land capability dassfiicafion: IVe Woodland ordination symbol. IOD for eastern white pine Im No as am M so law . PnD=Pineola gravelly loan% 15 to 25 percent slopes, stony �+ Setting Landscape: Intermediate mountains in the central and northeast central part of the county Elevation range: 3,400 to 4,600 feet Landform. Mountain ridges and slopes Landform position: Ridgetops and upper sideslopes Shape of areas: Irregularly shaped Size of areas. 2 to 275 acres . Composition, Pinola soils and similar inclusions: 85 percent Dissimilar inclusions:15 percent Typical Pmtile Surface layer. 0 to 7 inches=dark brown gravelly loam Subsoil: 7 to 20 inches --yellowish brown clay loam 20 to 26 inches --brownish yellow loam Underlying material: 26 to 32 inches=brownish yellow and very pale brown gravelly loam saprolite 32 to 61 inches=multicolored, soft weathered, metasiltstone bedrock Soil Pmperties and Qualides Depth class: Moderately deep �•�•► Drainage dam Well drained General texture class, Loamy Permeabilityy. Moderate Depth to seasonal high water table: Greater than 6.0 feet below the soil surface Hazard of flooding. None Shrink -swell potential: Low Slope class: Moderately steep +� Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion: Very severe Rock fragments on the surface. Widely scattered surface stones and cobbles that average about 10 to 24 inches in diameter and 25 to 75 feet apart Surface layer organic matter content: Moderate to high Potenfial frost action: Moderate Parent material., Residuum affected by sal creep in the upper part, weathered from felsic to mafic low-grade metamorphic rock Depth to bedrock 20 to 40 inches Minor Components Dissimllarindustons: - Soils with depth to bedrock at greater than 60 inches scattered randomly throughout the map unit - Soils with depth to soft or hard bedrock at less than 20 inches on shoulder slopes and scattered randomly throughout the map unit - Whiteoak soils which are colluvial in nature with depth to bedrock at greater than 60 inches in saddles and on toe slopes �' • Randomly scattered areas of rock outcrop 04 MM am• Similar inclusions: • Pinola soils with a fine sandy loam or sandy loam surface texture in the fine earth fraction "' • Pinola soils which have a lighter colored surface layer or with a thinner dark surface layer • Crossnore soils which have less day in the subsoil • Soils with depth to ham bedrock at 20 to 40 inches P" • Soils with depth to soft bedrock at 40 to 60 inches Land Use am Dominant Uses. Woodland, fraser fir production, ornamentals Other Uses: Pasture and hayland, and building site development so Cropland Agricultural Development .� Suitability: Poorly suited Management concerns: Steepness of slope, erod ability, filth, herbicide retention, climate, and rooting depth and droughtiness, and soil fertility Management measures: • This map unit is difficult to manage for cultivated crops because the slope limits the use of equipmeet. • Using resource management systems that include contour farming, conservation tillage, crop residue management, stdperopping, winter cover crops, and crop rotations which include grasses and legumes helps to reduce soil erosion, �. maximize rainfall infiltration, increase available water, and improve soil fertility. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce dodding and crusting and increases rainfall infiltration. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. �•, • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. • Incorporating plant residue helps to improve water holding capacity and using shallow rooted crops helps to overcome the moderately deep rooting depth of Pinola soils. Pasture and Hayland Suitability: Suited to pasture; suited to poorly suited to hayland Management concerns. Equipment use, erodibility, herbicide retention, and rooting depth and droughtiness, and soil fertility Management measures: • Steepness of slope may limit equipment use on steeper areas when harvesting hay crops. • Preparing seedbeds on the contour when renovating pastures and establishing seedbeds helps to prevent further soil �., erosion and increases germination. . • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. Orchard and Ornamental Crops Suitability: Suited im ow Management concems: Erodbility, root disease, frost action, soil fertility, herbicide retention, rooting depth, and ball and burlap harvesting Management measures: • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these soils. • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high day content of the subsoil. .� • Soils in this map unit may retain soil applied herbicides due to the high day content The concentration of herbicides may be damaging to future crops. • Moderately deep rooting depth may make Pinola soils in this map unit difficult to manage for ornamental and orchard crops because of low available water and windthrow hazard. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the �+ ball and tearing of the roots. • Using supplemental irrigation and crop varieties adapted to droughty conditions helps to increase productivity. Woodland Suiiablltty. Suited Productivity class: High for eastern white pine +•� Management concerns: Erodibility, equipment use, seedling survival, and windthrow hazard Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts and avolding diversion of water directly onto fill slopes helps to stabilize logging roads, slid trails, and landings. " Reseeding all disturbed areas with adapted grasses and legumes helps to prevent soil erosion. • Leaving a buffer zone of trees and shrubs a4acent to streams helps to reduce siltation and provides shade for the aquatic habitat. �., • Avoid grazing livestock in areas managed for woodland. • Avoiding logging operations during periods when the soil is saturated helps to prevent nutting of the soil surface and damage to tree roots due to soil compaction. • Using improved varieties of Eastern white One helps to increase productivity. • Productivity may be limited on areas of Pinola soils because of the limited rooting depth of these soils. • Replanting may be necessary on warn, south- to west -facing slopes because of reduced soil moisture or in areas of higher clay content in the subsoil. Planting when the soil is moist for extended periods helps to increase seedling survival. Urban DeWopment "a Dwellings Suitability.• Suited to poorly suited am Management concerns: Steepness of slope, erodrbility, corosivity, and depth to.bedrock Management measures. • Designing structures to conform with natural slopes helps to improve soil performance. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Using corrosion -resistant materials for foundations and basements helps to reduce the risk of damage to concrete. • The soft bedrock underlying the soils in this map unit does not require special equipment for excavation but is difficult to revegatate or to pack if used in fill slopes. Septic Tank Absorption Fields Suitability: Poorly suited M" Management concerns: Depth to soft bedrock, .permeability and steepness of slope Management measures: A. • Contact the local Health Department for guidance on sanitary facilities. • This map unit is difficult to manage for septic tank absorption fields because the dominant soils are moderately deep to soft bedrock. • Increasing the size of septic tank absorption field helps to improve performance • Raking trench walls helps to reduce sealing of soil pones which may occur during the excavation of septic tank absorption fields. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. Local Roads and Streets No Suitabrliiy.• Suited Management concerns. Depth to bedrock, frost action, erodibility, and steepness of slope Management measures. �a • Designing roads on the contour and installing water control structures such as broad base clips, waterbars, and culverts helps to maintain road stability. Avoiding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost °r heaving. • The soft bedrock underlying the soils in this map unit should not require special equipment for excavation but are difficult to vegetate or to pack if used in fill slopes. �w Lawns and Landscaping Surtabllo. Suited to poorly suited Management concerns: Steepness of slope, erodibility, soil fertility, frost action, and sal compaction Management measures. • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using �.., erosion control structures such as sediment fences and catch basins helps to keep eroding sal on site. • Using lime, fertilizer, mulch, irrigation, and varieties adapted to droughty conditions helps to establish lawns and landscape plants. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Avoiang heavy equipment use on areas to be landscaped helps to prevent soil compaction. Interpretive Groups +R Land capablllty dassllication. Vle Woodland ordination symbol: IOR for eastern white pine Im fm 0" no 6" WtD=Whiteoak fine sandy loam,15 to 30 percent slopes, very stony •• Setting Landscape: Intermediate mountains in the central and northeast central part of the county Elevation range. 3,000 to 4,200 feet Landform. Coves, colluvial fans, and benches Landform position: Foot slopes and toe slopes Shape of areas: Irregular Size of areas. 2 to 30 acres w Whiteoak soils and similar inclusions: 90 percent Dissimilar inclusions:10 percent F" Composition Typical Profile Surface layer. 0 to 9 inches --very dark grayish brown fine sandy loam Subsoil. 9 to 12 inches=dark yellowish brown fine sandy loam 12 to 30 inchesyellowish brown clay loam �., 30 to 55 inches=yellowish brown loam 55 to 62 inches=yellowish brown loam Soil Properties and Qualides P" Depth class: Very deep Drainage dam Well drained so General texture class: Loamy PermeabiRy. Moderate Depth to seasonal high water table: Greater than 6.0 feet below the soil surface Hazard of flooding. None No Shrink -swell potential• Low Slope class: Moderately steep Extent of erosion: Slight, less than 25 percent of the original surface layer has been removed Hazard of water erosion. Very severe Surface layer organic matter content Moderate to high Potential frost action: Moderate Special climatic conditions: SuNect to slow air drainage allowing for late spring and early fall frost Parent material: Colluvium derived from felsic to maflc law -grade metamorphic rock Depth to bedrock Greater than 60 inches Other distinctive properties: Random areas of seeps and springs Minor Components Dissimilar inclusions: • Soils with more rock fragments in the subsoil, in drainageways as well as occurring randomly • Somewhat poorly drained Cullowhee soils that are loamy in the upper part and 20 to 40 inches to strata high in rock fragments, along stream channels Similar inclusions: • Whlteoak soils with sandy loam or loam surface texture • Whiteoak soils with surface layers that have less organic matter, and lack the thick dark surface layer • Stater soils that rarely flood for very brief duration, along stream channels so no PM Land Use Dominant Uses. Pasture, hayland, woodland Other Uses. Fraser fir production and ornamental crops Agricultural Development Cropland am Suitability. • Poorly suited Management concerns. Erodbility, steepness of slope, filth, soil fertility, herbicide retention, and climate no Management measures: • Soils in this map unit are difficult to manage for cultivated crops because steepness of slope limits equipment use. • Using resource management systems that include contour farming, conservation tillage, crop residue management, striperopping, winter cover crops, and crop rotations which include grasses and legumes helps to reduce sal erosion, RM maximize rainfall infiltration, increase available water, and improve soil fertility. • Avoiding tillage during wet periods, incorporating crop residue or leaving residue on the soil surface helps to reduce clodding and crusting and increases rainfall infiltration. �„ • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes crop productivity. • Slow air drainage may allow late spring frost to damage new growth in some years. Pasture and Hayland Suitability.• Suited to pasture; suited to poorly suited to hayland Management concerns. Equipment use, erodibility, herbicide retention, and soil fertility Management measures: • Steepness of slope may limit equipment use on steeper areas when harvesting hay crops. • Preparing seedbeds on the contour or across the slope helps to reduce soil erosion and increases germination. • Fencing livestock from creeks and streams helps to prevent streambank erosion and sedimentation. • Soils in this map unit retain soil applied herbicides due to the high organic matter content of the soil surface. The concentration of herbicides may be damaging to future crops. • Following lime and fertilizer recommendations from soil tests helps to increase plant nutrient availability and maximizes productivity when establishing, maintaining, or renovating pasture and hayland • Using rotational grazing, implementing a well planned clipping and harvesting schedule, and removing livestock in time to allow forage plants to recover before winter dormancy helps to maintain pastures and increases productivity. Orchard and Ornamental Crops Suitability., Suited Management concerns. Erodibility, steepness of slope, climate, root disease, ball and burlap harvesting, frost action, herbicide retention, and soil fertility, Management measures. • Proper management is the key to maximizing productivity and minimizing plant stress and minimizing disease such as phytophthora, on these sails. "' • Establishing and maintaining sod between rows and on access roads helps to reduce the hazard of erosion. • Proper channelization of water away from and not into fields helps to control phytophthora root disease caused by restricted movement of air and water due to the high clay content of the subsoil. MW • When planting fraser fir, avoid toe slope and foot slope positions on the landscape in this map unit. Also avoid drains, drainways, concave, and depressional areas where water would concentrate for prolonged periods of time. These areas are more susceptible to phytophthora root disease. • Slow air drainage may allow late spring frost to damage new growth in some years. Pja MM Ow • Avoiding ball and burlap harvesting during extreme moisture conditions helps prevent fracture or deformation of the ball and tearing of the roots. • Maintaining plant cover or using mulch helps to reduce damage to roots caused by frost heaving. • Using plant applied herbicides increases effectiveness as compared to soil applied herbicides which are tied -up by organic matter. • Following lime and fertilizer recommendations from soil tests helps to increase the availability of plant nutrients and maximize productivity. Woodland FM Suitability.. Suited Potential for commercial spedes: Moderately high for cove hardwoods Productivity class; Moderately high for yellow -poplar No Management concems: Steepness of slope, erodibility, seedling survival, and herbicide retention Management measures. • Designing roads on the contour and installing water control structures such as broad base dips, water bars, culverts ,.� and avoiding diversion of water directly onto fill slopes helps to stabilize logging roads, skid trails, and landings. Reseeding all disturbed areas with adapted grasses and legumes helps to prevent soil erosion. • Leaving a buffer zone of trees and shrubs adacent to streams helps to reduce siltation and provides shade for the aquatic habitat. • Avoid grazing livestock in areas managed for woodland. • These soils are best reforested by managing for natural regeneration of hardwoods or planting improved varieties of Eastern white pine. �, • Replanting may be necessary on warn, south- to west -facing slopes because of reduced soil moisture. Planting when the soil is mast for extended periods helps to increase seedling survival. • Soil applied herbicides are retained due to herbicide -organic matter binding which may damage tree seedlings when cropland is converted to woodland. Urban Development Im Dwellings Suitability.. Suited to poorly suited Management concems: Erodlbility, steepness of slope, seeps and springs, stones and boulders, and cor osivity am Management measures. • Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. Faq • Designing structures that conform to the natural slope helps to improve soil performance. • Installing a subsurface drainage system around foundations helps to intercept water from seeps and springs. • Using corrosion -resistant materials helps to reduce the risk of damage to concrete. • Large stones and boulders may be encountered during excavation. Septic Tank Absorption Fields am Suitability: Poorly suited Management concems. Steepness of slope, restricted permeability and, seeps and springs Management measures. • Contact the local Health Department for guidance on sanitary facilities. Ow • Increasing the size of septic tank absorption field helps to improve performance. • Raking trench walls helps to reduce sealing of soil pores which may occur during the excavation of septic tank absorption fields. im • Excavations may cut into seeps and springs. These areas should be avoided. • Installing distribution lines on the contour helps to improve performance of septic tank absorption fields. Local Roads and Streets Ow FM OR Suitability: Suited am Management concerns: Steepness of slope, low strength, erodibility, frost action, and seeps and springs Management measures. • Incorporating sand and gravel and compacting roadbeds helps to improve soil strength. • Designing roads on the contour and installing water control structures such as broad base dips, waterbars, and IM culverts helps to maintain road stability. Avdding diversion of water directly onto fill slopes and vegetating cut and fill slopes as soon as possible helps to prevent slippage and excessive soil erosion. • Permanent surfacing of roads or using suitable subgrade or base material helps to reduce damage from frost heaving. • Intercepting and diverting underground water from seeps and springs helps to stabilize cut and fill slopes. Lawns and Landscaping Suiiabilo.• Suited to poorly suited Management concems: Steepness of slope, erodibility, soil compaction, frost action, herbicide retention, large stones and boulders, climate, and soil fertility Management measures: • Designing plantings on natural contours helps to increase water infiltration. Vegetating disturbed areas and using erosion control structures such as sediment fences and catch basins helps to keep eroding soil on site. • Avoiding heavy equipment use on areas to be landscaped helps to prevent soil compaction. • Using mulch helps to reduce damage to newly established landscape plants caused by frost heaving. • Using plant applied herbicides increases effectiveness as compared to soil applied herbicides which are tied -up by organic matter. • Removing the large stones and boulders and limiting the use of equipment to the larger, open areas help to improve the suitatxlity of these soils. • Slow air drainage may allow late spring frost to damage new growth in some years. • Using lime, fertilizer, mulch, and irrigation helps to establish lawns and landscape plants. • Stockpile topsoil from disturbed areas and replace it before landscaping. Interpretive Groups Land capability classification: Vle Woodland ordination symbol. • 7R for yellow -poplar B, Im M FJW no . /t YA `r 9lG r •► vw1- WD x t ��7u : 1�Ky�/t �a H •8D 46D o c q9E Q7D 6P F 4 68�a. ioBA 6flC h. r ;� . 1 9s�' � � � .,. IVE •v •'� , � y wT 68Fr YAp v� 'W12 R . - a 5 ' ,s Fin, - N�l81 �- • LSD M r w i; scale �A 160 ' t Y, t _, .lifv.r g!'` 8.. !.• �. '1,j.. �!, t l {t`A t + r � ..t t: 61C: �,ty., ,.•h ?w. � 1r �, 1. �r �lsr"*„•..� � '?`? � t! �' •n 7 '"Y,tr'a,,i - (�1' ''lit0 1 n. �A i� y�-:.;•.�' • • U. S. Department of Agriculture T Soil Survey Field Sheet Natural Resources Conservation Service - N - 1" = 1000' Avery County, North Carolina Cooperating with Approximate Scale Advance Copy - Subject To Change S1 late Agric Rural Experiment Station Survey has not been compiled no: co•,eiaie- I I I I I I ....A . r.�. --n wonJ .... - I I,m may bef„••,.•a and I m.y be crnr,. Local Government Review Requirements for the Issuance of New Non -Municipal Domestic Wastewater Discharge Permits General Statute Overview North Carolina General Statute 143-215.1 (c)(6) allows input from local governments in the issuance of NPDES Permits for non - municipal domestic wastewater treatment facilities. Specifically, the Environmental Management Commission (EMC) may not act on an application for a new non -municipal domestic wastewater discharge facility until it has received a written statement from each city and county government having jurisdiction over any part of the lands on which the proposed facility and its appurtenances are to be located. The written statement shall document whether the city or county has a zoning or subdivision ordinance in effect and (if such an ordinance is in effect) whether the proposed facility is consistent with the ordinance. The EMC shall not approve a permit application for any facility which a city or county has determined to be inconsistent with zoning or subdivision ordinances unless the approval of such application is determined to have statewide significance and is in the best interest of the State. Instructions to the Applicant Prior to submitting an application for a NPDES Permit for a proposed facility, the applicant shall request that both the nearby city and county government complete this forth. The applicant must: ♦ Submit a copy of the permit application (with a written request for this form to be completed) to the clerk of the city and the county by certified mail, return receipt requested. ♦ If either (or both) local goverrument(s) fails) to mail the completed form, as evidenced by the postmark on the certified mail card(s), within 15 days after receiving and signing for the certified mail, the applicant may submit the application to the NPDES Unit. ♦ As evidence to the Commission that the local government(s) failed to respond within 15 days, the applicant shall submit a copy of the certified mail card along with a notarized letter stating that the local government(s) failed to respond within the 15-day period. Instructions to the Local Government The nearby city and/or county government which may have or has jurisdiction over any part of the land on which the proposed facility or its appurtenances are to be located is required to complete and return this form to the applicant within 15 days of receipt. The form must be signed and notarized. Name of local I (City/County) Does the city/county have jurisdiction over any part of the land on which the proposed facility and its appurtenances are to be located? Yes [vr No [ ] If no, please sign this form, have it notarized, and return it to the applicant. Does the city/county have in effect a zoning or subdivision ordinance? Yes [V(No [ If there is a zoning or subdivision ordinance in effect, is the plan for the proposed facility consistent with the ordinance? Yes [ V]' No [ ] Date ri 2 2OVO Signature dy'o-(l K, IJ (City Manager/County Manager) State of W2 CA ROU W 4, , County of A'%IJ ERA On this 2 day of 2600, personally appeared before me, the said name F_)oNaJJ K. Jl 5 cer to me known and known to me to be the person described in and who executed the foregoing document and he (or she) acknowledged that he (or she) executed the same and being duly sworn by me, made oath that the statements in the foregoing document are true. My Commission expires 2//9/A00 3 .(Signature of Notary Public, . a �O . mgo Notary Public (Offi ial Seal)