Agriculture States Department of Report for Agriculture ... · United States Department of Agriculture ... Survey is a joint effort of the United States Department of Agriculture

United StatesDepartment ofAgriculture

A product of the NationalCooperative Soil Survey,a joint effort of the UnitedStates Department ofAgriculture and otherFederal agencies, Stateagencies including theAgricultural ExperimentStations, and localparticipants

Custom Soil ResourceReport for

WilliamsonCounty,Tennessee178 Acres on Arno Allisona andGile Hill Roads

NaturalResourcesConservationService

February 1, 2014

PrefaceSoil surveys contain information that affects land use planning in survey areas. Theyhighlight soil limitations that affect various land uses and provide information aboutthe properties of the soils in the survey areas. Soil surveys are designed for manydifferent users, including farmers, ranchers, foresters, agronomists, urban planners,community officials, engineers, developers, builders, and home buyers. Also,conservationists, teachers, students, and specialists in recreation, waste disposal,and pollution control can use the surveys to help them understand, protect, or enhancethe environment.

Various land use regulations of Federal, State, and local governments may imposespecial restrictions on land use or land treatment. Soil surveys identify soil propertiesthat are used in making various land use or land treatment decisions. The informationis intended to help the land users identify and reduce the effects of soil limitations onvarious land uses. The landowner or user is responsible for identifying and complyingwith existing laws and regulations.

Although soil survey information can be used for general farm, local, and wider areaplanning, onsite investigation is needed to supplement this information in some cases.Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/health/) and certain conservation and engineering applications. Formore detailed information, contact your local USDA Service Center (http://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State SoilScientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951).

Great differences in soil properties can occur within short distances. Some soils areseasonally wet or subject to flooding. Some are too unstable to be used as afoundation for buildings or roads. Clayey or wet soils are poorly suited to use as septictank absorption fields. A high water table makes a soil poorly suited to basements orunderground installations.

The National Cooperative Soil Survey is a joint effort of the United States Departmentof Agriculture and other Federal agencies, State agencies including the AgriculturalExperiment Stations, and local agencies. The Natural Resources ConservationService (NRCS) has leadership for the Federal part of the National Cooperative SoilSurvey.

Information about soils is updated periodically. Updated information is availablethrough the NRCS Web Soil Survey, the site for official soil survey information.

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programsand activities on the basis of race, color, national origin, age, disability, and whereapplicable, sex, marital status, familial status, parental status, religion, sexualorientation, genetic information, political beliefs, reprisal, or because all or a part of anindividual's income is derived from any public assistance program. (Not all prohibitedbases apply to all programs.) Persons with disabilities who require alternative means

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http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/health/

http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/health/

http://offices.sc.egov.usda.gov/locator/app?agency=nrcs

http://offices.sc.egov.usda.gov/locator/app?agency=nrcs

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951

for communication of program information (Braille, large print, audiotape, etc.) shouldcontact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file acomplaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272(voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider andemployer.

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ContentsPreface....................................................................................................................2How Soil Surveys Are Made..................................................................................5Soil Map..................................................................................................................7

Soil Map................................................................................................................8Legend..................................................................................................................9Map Unit Legend................................................................................................10Map Unit Descriptions........................................................................................11

Williamson County, Tennessee......................................................................13ArB—Armour silt loam, 2 to 5 percent slopes.............................................13ArB2—Armour silt loam, 2 to 5 percent slopes, eroded..............................13BrB2—Braxton cherty silt loam, 2 to 5 percent slopes, eroded...................14BrC2—Braxton cherty silt loam, 5 to 12 percent slopes, eroded.................15BrD2—Braxton cherty silt loam, 12 to 20 percent slopes, eroded...............16CaB—Captina silt loam, phosphatic, 2 to 5 percent slopes........................16CfD2—Culleoka flaggy loam, 12 to 20 percent slopes, eroded...................17CkD—Culleoka silt loam, 12 to 20 percent slopes......................................18CkE—Culleoka silt loam, 20 to 35 percent slopes......................................19DeD—Dellrose cherty silt loam, 12 to 20 percent slopes............................19DeE—Dellrose cherty silt loam, 20 to 30 percent slopes............................20DeF—Dellrose cherty silt loam, 30 to 40 percent slopes............................21HpB—Humphreys gravelly silt loam, 2 to 5 percent slopes........................22HpC—Humphreys gravelly silt loam, 5 to 12 percent slopes......................23Hu—Huntington silt loam, phosphatic.........................................................24Ld—Lindside cherty silt loam, phosphatic...................................................25Lp—Lindside silt loam, phosphatic..............................................................26MbB2—Maury silt loam, 2 to 5 percent slopes, eroded...............................27Me—Melvin silt loam, phosphatic................................................................28MhE2—Mimosa cherty silt loam, 20 to 30 percent slopes, eroded.............28MkE3—Mimosa cherty silty clay, 20 to 30 percent slopes, severely

eroded...................................................................................................29MnE—Mimosa very rocky soils, 20 to 40 percent slopes............................30MoD—Mimosa and Ashwood very rocky soils, 5 to 20 percent slopes.......31Rc—Rockland.............................................................................................32SrC3—Stiversville clay loam, 5 to 12 percent slopes, severely eroded......34StB2—Stiversville silt loam, 2 to 5 percent slopes, eroded.........................34StC2—Stiversville silt loam, 5 to 12 percent slopes, eroded.......................35W—Water....................................................................................................36

Soil Information for All Uses...............................................................................37Suitabilities and Limitations for Use....................................................................37

Land Classifications........................................................................................37Farmland Classification...............................................................................37

Sanitary Facilities............................................................................................42ENG - Conventional On-Site Septic Systems (TN).....................................42

References............................................................................................................50

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How Soil Surveys Are MadeSoil surveys are made to provide information about the soils and miscellaneous areasin a specific area. They include a description of the soils and miscellaneous areas andtheir location on the landscape and tables that show soil properties and limitationsaffecting various uses. Soil scientists observed the steepness, length, and shape ofthe slopes; the general pattern of drainage; the kinds of crops and native plants; andthe kinds of bedrock. They observed and described many soil profiles. A soil profile isthe sequence of natural layers, or horizons, in a soil. The profile extends from thesurface down into the unconsolidated material in which the soil formed or from thesurface down to bedrock. The unconsolidated material is devoid of roots and otherliving organisms and has not been changed by other biological activity.

Currently, soils are mapped according to the boundaries of major land resource areas(MLRAs). MLRAs are geographically associated land resource units that sharecommon characteristics related to physiography, geology, climate, water resources,soils, biological resources, and land uses (USDA, 2006). Soil survey areas typicallyconsist of parts of one or more MLRA.

The soils and miscellaneous areas in a survey area occur in an orderly pattern that isrelated to the geology, landforms, relief, climate, and natural vegetation of the area.Each kind of soil and miscellaneous area is associated with a particular kind oflandform or with a segment of the landform. By observing the soils and miscellaneousareas in the survey area and relating their position to specific segments of thelandform, a soil scientist develops a concept, or model, of how they were formed. Thus,during mapping, this model enables the soil scientist to predict with a considerabledegree of accuracy the kind of soil or miscellaneous area at a specific location on thelandscape.

Commonly, individual soils on the landscape merge into one another as theircharacteristics gradually change. To construct an accurate soil map, however, soilscientists must determine the boundaries between the soils. They can observe onlya limited number of soil profiles. Nevertheless, these observations, supplemented byan understanding of the soil-vegetation-landscape relationship, are sufficient to verifypredictions of the kinds of soil in an area and to determine the boundaries.

Soil scientists recorded the characteristics of the soil profiles that they studied. Theynoted soil color, texture, size and shape of soil aggregates, kind and amount of rockfragments, distribution of plant roots, reaction, and other features that enable them toidentify soils. After describing the soils in the survey area and determining theirproperties, the soil scientists assigned the soils to taxonomic classes (units).Taxonomic classes are concepts. Each taxonomic class has a set of soilcharacteristics with precisely defined limits. The classes are used as a basis forcomparison to classify soils systematically. Soil taxonomy, the system of taxonomicclassification used in the United States, is based mainly on the kind and character ofsoil properties and the arrangement of horizons within the profile. After the soilscientists classified and named the soils in the survey area, they compared the

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individual soils with similar soils in the same taxonomic class in other areas so thatthey could confirm data and assemble additional data based on experience andresearch.

The objective of soil mapping is not to delineate pure map unit components; theobjective is to separate the landscape into landforms or landform segments that havesimilar use and management requirements. Each map unit is defined by a uniquecombination of soil components and/or miscellaneous areas in predictableproportions. Some components may be highly contrasting to the other components ofthe map unit. The presence of minor components in a map unit in no way diminishesthe usefulness or accuracy of the data. The delineation of such landforms andlandform segments on the map provides sufficient information for the development ofresource plans. If intensive use of small areas is planned, onsite investigation isneeded to define and locate the soils and miscellaneous areas.

Soil scientists make many field observations in the process of producing a soil map.The frequency of observation is dependent upon several factors, including scale ofmapping, intensity of mapping, design of map units, complexity of the landscape, andexperience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specificlocations. Once the soil-landscape model is refined, a significantly smaller number ofmeasurements of individual soil properties are made and recorded. Thesemeasurements may include field measurements, such as those for color, depth tobedrock, and texture, and laboratory measurements, such as those for content ofsand, silt, clay, salt, and other components. Properties of each soil typically vary fromone point to another across the landscape.

Observations for map unit components are aggregated to develop ranges ofcharacteristics for the components. The aggregated values are presented. Directmeasurements do not exist for every property presented for every map unitcomponent. Values for some properties are estimated from combinations of otherproperties.

While a soil survey is in progress, samples of some of the soils in the area generallyare collected for laboratory analyses and for engineering tests. Soil scientists interpretthe data from these analyses and tests as well as the field-observed characteristicsand the soil properties to determine the expected behavior of the soils under differentuses. Interpretations for all of the soils are field tested through observation of the soilsin different uses and under different levels of management. Some interpretations aremodified to fit local conditions, and some new interpretations are developed to meetlocal needs. Data are assembled from other sources, such as research information,production records, and field experience of specialists. For example, data on cropyields under defined levels of management are assembled from farm records and fromfield or plot experiments on the same kinds of soil.

Predictions about soil behavior are based not only on soil properties but also on suchvariables as climate and biological activity. Soil conditions are predictable over longperiods of time, but they are not predictable from year to year. For example, soilscientists can predict with a fairly high degree of accuracy that a given soil will havea high water table within certain depths in most years, but they cannot predict that ahigh water table will always be at a specific level in the soil on a specific date.

After soil scientists located and identified the significant natural bodies of soil in thesurvey area, they drew the boundaries of these bodies on aerial photographs andidentified each as a specific map unit. Aerial photographs show trees, buildings, fields,roads, and rivers, all of which help in locating boundaries accurately.

Custom Soil Resource Report

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Soil MapThe soil map section includes the soil map for the defined area of interest, a list of soilmap units on the map and extent of each map unit, and cartographic symbolsdisplayed on the map. Also presented are various metadata about data used toproduce the map, and a description of each soil map unit.

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Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS840 350 700 1400 2100

Feet0 100 200 400 600

MetersMap Scale: 1:7,640 if printed on A portrait (8.5" x 11") sheet.

MAP LEGEND MAP INFORMATION

Area of Interest (AOI)Area of Interest (AOI)

SoilsSoil Map Unit Polygons

Soil Map Unit Lines

Soil Map Unit Points

Special Point FeaturesBlowout

Borrow Pit

Clay Spot

Closed Depression

Gravel Pit

Gravelly Spot

Landfill

Lava Flow

Marsh or swamp

Mine or Quarry

Miscellaneous Water

Perennial Water

Rock Outcrop

Saline Spot

Sandy Spot

Severely Eroded Spot

Sinkhole

Slide or Slip

Sodic Spot

Spoil Area

Stony Spot

Very Stony Spot

Wet Spot

Other

Special Line Features

Water FeaturesStreams and Canals

TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads

BackgroundAerial Photography

The soil surveys that comprise your AOI were mapped at 1:15,800.

Warning: Soil Map may not be valid at this scale.

Enlargement of maps beyond the scale of mapping can causemisunderstanding of the detail of mapping and accuracy of soil lineplacement. The maps do not show the small areas of contrastingsoils that could have been shown at a more detailed scale.

Please rely on the bar scale on each map sheet for mapmeasurements.

Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL: http://websoilsurvey.nrcs.usda.govCoordinate System: Web Mercator (EPSG:3857)

Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but distortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if more accuratecalculations of distance or area are required.

This product is generated from the USDA-NRCS certified data as ofthe version date(s) listed below.

Soil Survey Area: Williamson County, TennesseeSurvey Area Data: Version 9, Dec 21, 2013

Soil map units are labeled (as space allows) for map scales 1:50,000or larger.

Date(s) aerial images were photographed: Mar 17, 2011—May 5,2011

The orthophoto or other base map on which the soil lines werecompiled and digitized probably differs from the backgroundimagery displayed on these maps. As a result, some minor shiftingof map unit boundaries may be evident.


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Map Unit Legend

Williamson County, Tennessee (TN187)

Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI

ArB Armour silt loam, 2 to 5 percentslopes

0.7 0.4%

ArB2 Armour silt loam, 2 to 5 percentslopes, eroded

8.7 5.0%

BrB2 Braxton cherty silt loam, 2 to 5percent slopes, eroded

2.7 1.6%

BrC2 Braxton cherty silt loam, 5 to 12percent slopes, eroded

5.4 3.1%

BrD2 Braxton cherty silt loam, 12 to 20percent slopes, eroded

3.3 1.9%

CaB Captina silt loam, phosphatic, 2to 5 percent slopes

3.1 1.8%

CfD2 Culleoka flaggy loam, 12 to 20percent slopes, eroded

2.3 1.3%

CkD Culleoka silt loam, 12 to 20percent slopes

1.8 1.0%

CkE Culleoka silt loam, 20 to 35percent slopes

4.1 2.3%

DeD Dellrose cherty silt loam, 12 to 20percent slopes

4.1 2.4%

DeE Dellrose cherty silt loam, 20 to 30percent slopes

5.1 2.9%

DeF Dellrose cherty silt loam, 30 to 40percent slopes

3.9 2.2%

HpB Humphreys gravelly silt loam, 2to 5 percent slopes

7.1 4.1%

HpC Humphreys gravelly silt loam, 5to 12 percent slopes

9.5 5.5%

Hu Huntington silt loam, phosphatic 5.1 2.9%

Ld Lindside cherty silt loam,phosphatic

7.1 4.1%

Lp Lindside silt loam, phosphatic 24.5 14.1%

MbB2 Maury silt loam, 2 to 5 percentslopes, eroded

0.0 0.0%

Me Melvin silt loam, phosphatic 13.7 7.9%

MhE2 Mimosa cherty silt loam, 20 to 30percent slopes, eroded

4.5 2.6%

MkE3 Mimosa cherty silty clay, 20 to 30percent slopes, severelyeroded

3.7 2.2%

MnE Mimosa very rocky soils, 20 to 40percent slopes

4.5 2.6%


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Williamson County, Tennessee (TN187)

Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI

MoD Mimosa and Ashwood veryrocky soils, 5 to 20 percentslopes

5.1 3.0%

Rc Rockland 14.1 8.1%

SrC3 Stiversville clay loam, 5 to 12percent slopes, severelyeroded

0.4 0.2%

StB2 Stiversville silt loam, 2 to 5percent slopes, eroded

23.7 13.7%

StC2 Stiversville silt loam, 5 to 12percent slopes, eroded

5.3 3.0%

W Water 0.0 0.0%

Totals for Area of Interest 173.4 100.0%

Map Unit DescriptionsThe map units delineated on the detailed soil maps in a soil survey represent the soilsor miscellaneous areas in the survey area. The map unit descriptions, along with themaps, can be used to determine the composition and properties of a unit.

A map unit delineation on a soil map represents an area dominated by one or moremajor kinds of soil or miscellaneous areas. A map unit is identified and namedaccording to the taxonomic classification of the dominant soils. Within a taxonomicclass there are precisely defined limits for the properties of the soils. On the landscape,however, the soils are natural phenomena, and they have the characteristic variabilityof all natural phenomena. Thus, the range of some observed properties may extendbeyond the limits defined for a taxonomic class. Areas of soils of a single taxonomicclass rarely, if ever, can be mapped without including areas of other taxonomicclasses. Consequently, every map unit is made up of the soils or miscellaneous areasfor which it is named and some minor components that belong to taxonomic classesother than those of the major soils.

Most minor soils have properties similar to those of the dominant soil or soils in themap unit, and thus they do not affect use and management. These are callednoncontrasting, or similar, components. They may or may not be mentioned in aparticular map unit description. Other minor components, however, have propertiesand behavioral characteristics divergent enough to affect use or to require differentmanagement. These are called contrasting, or dissimilar, components. They generallyare in small areas and could not be mapped separately because of the scale used.Some small areas of strongly contrasting soils or miscellaneous areas are identifiedby a special symbol on the maps. If included in the database for a given area, thecontrasting minor components are identified in the map unit descriptions along withsome characteristics of each. A few areas of minor components may not have beenobserved, and consequently they are not mentioned in the descriptions, especiallywhere the pattern was so complex that it was impractical to make enough observationsto identify all the soils and miscellaneous areas on the landscape.

The presence of minor components in a map unit in no way diminishes the usefulnessor accuracy of the data. The objective of mapping is not to delineate pure taxonomic


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classes but rather to separate the landscape into landforms or landform segments thathave similar use and management requirements. The delineation of such segmentson the map provides sufficient information for the development of resource plans. Ifintensive use of small areas is planned, however, onsite investigation is needed todefine and locate the soils and miscellaneous areas.

An identifying symbol precedes the map unit name in the map unit descriptions. Eachdescription includes general facts about the unit and gives important soil propertiesand qualities.

Soils that have profiles that are almost alike make up a soil series. Except fordifferences in texture of the surface layer, all the soils of a series have major horizonsthat are similar in composition, thickness, and arrangement.

Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity,degree of erosion, and other characteristics that affect their use. On the basis of suchdifferences, a soil series is divided into soil phases. Most of the areas shown on thedetailed soil maps are phases of soil series. The name of a soil phase commonlyindicates a feature that affects use or management. For example, Alpha silt loam, 0to 2 percent slopes, is a phase of the Alpha series.

Some map units are made up of two or more major soils or miscellaneous areas.These map units are complexes, associations, or undifferentiated groups.

A complex consists of two or more soils or miscellaneous areas in such an intricatepattern or in such small areas that they cannot be shown separately on the maps. Thepattern and proportion of the soils or miscellaneous areas are somewhat similar in allareas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.

An association is made up of two or more geographically associated soils ormiscellaneous areas that are shown as one unit on the maps. Because of present oranticipated uses of the map units in the survey area, it was not considered practicalor necessary to map the soils or miscellaneous areas separately. The pattern andrelative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.

An undifferentiated group is made up of two or more soils or miscellaneous areas thatcould be mapped individually but are mapped as one unit because similarinterpretations can be made for use and management. The pattern and proportion ofthe soils or miscellaneous areas in a mapped area are not uniform. An area can bemade up of only one of the major soils or miscellaneous areas, or it can be made upof all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.

Some surveys include miscellaneous areas. Such areas have little or no soil materialand support little or no vegetation. Rock outcrop is an example.


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Williamson County, Tennessee

ArB—Armour silt loam, 2 to 5 percent slopes

Map Unit SettingElevation: 450 to 700 feetMean annual precipitation: 46 to 60 inchesMean annual air temperature: 57 to 61 degrees FFrost-free period: 190 to 200 days

Map Unit CompositionArmour and similar soils: 100 percent

Description of Armour

SettingLandform: Stream terracesLandform position (three-dimensional): TreadParent material: Loamy alluvium derived from interbedded sedimentary rock

Properties and qualitiesSlope: 2 to 5 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.60 to 2.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: High (about 11.6 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2eHydrologic Soil Group: B

Typical profile0 to 13 inches: Silt loam13 to 60 inches: Silty clay loam

ArB2—Armour silt loam, 2 to 5 percent slopes, eroded


Map Unit CompositionArmour and similar soils: 100 percent


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Description of Armour

SettingLandform: Stream terracesLandform position (three-dimensional): TreadParent material: Loamy alluvium derived from interbedded sedimentary rock





BrB2—Braxton cherty silt loam, 2 to 5 percent slopes, eroded

Map Unit SettingElevation: 900 to 1,200 feetMean annual precipitation: 48 to 55 inchesMean annual air temperature: 57 to 61 degrees FFrost-free period: 190 to 205 days

Map Unit CompositionBraxton and similar soils: 100 percent

Description of Braxton

SettingLandform: HillslopesLandform position (three-dimensional): CrestParent material: Clayey alluvium and/or residuum

Properties and qualitiesSlope: 2 to 5 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to

0.60 in/hr)Depth to water table: More than 80 inches


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Frequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 8.4 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2eHydrologic Soil Group: C

Typical profile0 to 10 inches: Gravelly silt loam10 to 30 inches: Silty clay loam30 to 60 inches: Clay

BrC2—Braxton cherty silt loam, 5 to 12 percent slopes, eroded




SettingLandform: HillslopesLandform position (three-dimensional): Side slopeParent material: Clayey alluvium and/or residuum


0.60 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 8.3 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 3eHydrologic Soil Group: C



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BrD2—Braxton cherty silt loam, 12 to 20 percent slopes, eroded




SettingLandform: HillslopesLandform position (three-dimensional): Side slopeParent material: Clayey alluvium and/or residuum


0.60 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 8.3 inches)



CaB—Captina silt loam, phosphatic, 2 to 5 percent slopes



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Map Unit CompositionCaptina and similar soils: 100 percent

Description of Captina

SettingLandform: Stream terracesLandform position (three-dimensional): TreadParent material: Silty or loamy colluvium over clayey residuum weathered from

limestone

Properties and qualitiesSlope: 2 to 5 percentDepth to restrictive feature: 20 to 30 inches to fragipanDrainage class: Moderately well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately low to

moderately high (0.06 to 0.20 in/hr)Depth to water table: About 16 to 34 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Low (about 4.1 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2eHydrologic Soil Group: C

Typical profile0 to 9 inches: Silt loam9 to 24 inches: Silty clay loam24 to 40 inches: Silty clay loam40 to 60 inches: Silty clay loam

CfD2—Culleoka flaggy loam, 12 to 20 percent slopes, eroded


Map Unit CompositionSandhill and similar soils: 100 percent

Description of Sandhill

SettingLandform: HillslopesLandform position (three-dimensional): Side slopeParent material: Loamy residuum weathered from limestone, sandstone, and shale


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Properties and qualitiesSlope: 12 to 20 percentDepth to restrictive feature: 39 to 59 inches to paralithic bedrockDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately low to

moderately high (0.06 to 0.60 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Low (about 4.8 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 4eHydrologic Soil Group: B

Typical profile0 to 8 inches: Flaggy loam8 to 20 inches: Flaggy clay loam20 to 48 inches: Channery clay loam48 to 58 inches: Bedrock

CkD—Culleoka silt loam, 12 to 20 percent slopes

Map Unit SettingMean annual precipitation: 46 to 60 inchesMean annual air temperature: 57 to 61 degrees FFrost-free period: 190 to 200 days

Map Unit CompositionStiversville and similar soils: 100 percent

Description of Stiversville


Properties and qualitiesSlope: 12 to 20 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: High (about 9.7 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 4e


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Hydrologic Soil Group: B

Typical profile0 to 10 inches: Silt loam10 to 48 inches: Clay loam48 to 60 inches: Channery clay loam

CkE—Culleoka silt loam, 20 to 35 percent slopes


Map Unit CompositionStiversville, very deep, and similar soils: 100 percent

Description of Stiversville, Very Deep


Properties and qualitiesSlope: 20 to 35 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: High (about 9.7 inches)


Typical profile0 to 10 inches: Silt loam10 to 48 inches: Clay loam48 to 60 inches: Channery clay loam

DeD—Dellrose cherty silt loam, 12 to 20 percent slopes

Map Unit SettingMean annual precipitation: 46 to 60 inchesMean annual air temperature: 57 to 61 degrees F


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Frost-free period: 190 to 200 days

Map Unit CompositionDellrose and similar soils: 100 percent

Description of Dellrose

SettingLandform: HillslopesLandform position (three-dimensional): Base slopeParent material: Loamy colluvium derived from limestone


(0.60 to 2.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 7.6 inches)


Typical profile0 to 15 inches: Gravelly silt loam15 to 48 inches: Gravelly silty clay loam48 to 70 inches: Clay

DeE—Dellrose cherty silt loam, 20 to 30 percent slopes





Properties and qualitiesSlope: 20 to 30 percentDepth to restrictive feature: More than 80 inches


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Drainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.60 to 2.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 7.6 inches)


Typical profile0 to 15 inches: Gravelly silt loam15 to 48 inches: Gravelly silty clay loam48 to 70 inches: Clay

DeF—Dellrose cherty silt loam, 30 to 40 percent slopes






(0.60 to 2.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: RareAvailable water capacity: Moderate (about 7.5 inches)


Typical profile0 to 10 inches: Gravelly silt loam


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10 to 48 inches: Gravelly silty clay loam48 to 70 inches: Clay

HpB—Humphreys gravelly silt loam, 2 to 5 percent slopes


Map Unit CompositionHumphreys and similar soils: 90 percentMinor components: 10 percent

Description of Humphreys

SettingLandform: Stream terracesLandform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slope, treadDown-slope shape: Convex, concaveAcross-slope shape: Convex, linearParent material: Gravelly slope alluvium derived from cherty limestone

Properties and qualitiesSlope: 2 to 5 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)Depth to water table: About 60 to 72 inchesFrequency of flooding: NoneFrequency of ponding: NoneMaximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)Available water capacity: Moderate (about 6.1 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability classification (irrigated): 2eLand capability (nonirrigated): 2eHydrologic Soil Group: A

Typical profile0 to 10 inches: Gravelly silt loam10 to 27 inches: Gravelly silt loam27 to 42 inches: Extremely gravelly coarse sandy loam42 to 80 inches: Gravelly silt loam

Minor Components

ArmourPercent of map unit: 5 percentLandform: Stream terraces


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Landform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slope, treadDown-slope shape: Concave, convexAcross-slope shape: Linear, convex

TarklinPercent of map unit: 3 percentLandform: Stream terracesLandform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slope, treadDown-slope shape: Convex, concaveAcross-slope shape: Convex, linear

OcanaPercent of map unit: 2 percentLandform: Flood-plain stepsLandform position (three-dimensional): TreadDown-slope shape: Concave, linearAcross-slope shape: Linear

HpC—Humphreys gravelly silt loam, 5 to 12 percent slopes


Map Unit CompositionHumphreys and similar soils: 90 percentMinor components: 10 percent

Description of Humphreys

SettingLandform: EscarpmentsLandform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slopeDown-slope shape: Concave, convexAcross-slope shape: Linear, convexParent material: Gravelly slope alluvium derived from cherty limestone over

colluvium derived from limestone

Properties and qualitiesSlope: 5 to 12 percentDepth to restrictive feature: More than 80 inchesDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)Depth to water table: About 60 to 72 inchesFrequency of flooding: NoneFrequency of ponding: None


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Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)Available water capacity: Moderate (about 6.1 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability classification (irrigated): 3eLand capability (nonirrigated): 3eHydrologic Soil Group: A

Typical profile0 to 10 inches: Gravelly silt loam10 to 27 inches: Gravelly silt loam27 to 42 inches: Extremely gravelly coarse sandy loam42 to 80 inches: Gravelly silt loam

Minor Components

ArmourPercent of map unit: 5 percentLandform: Stream terracesLandform position (two-dimensional): BackslopeLandform position (three-dimensional): Side slope, treadDown-slope shape: Concave, linearAcross-slope shape: Concave, linear

MimosaPercent of map unit: 3 percentLandform: EscarpmentsLandform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slopeDown-slope shape: Convex, concaveAcross-slope shape: Convex, linear

SkidmorePercent of map unit: 2 percentLandform: Stream terracesLandform position (two-dimensional): FootslopeLandform position (three-dimensional): Base slope, treadDown-slope shape: Concave, convexAcross-slope shape: Linear, convex

Hu—Huntington silt loam, phosphatic


Map Unit CompositionHuntington and similar soils: 100 percent


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Description of Huntington

SettingLandform: Flood plainsLandform position (three-dimensional): TreadParent material: Loamy alluvium derived from limestone, sandstone, and shale


(0.60 to 2.00 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: OccasionalFrequency of ponding: NoneAvailable water capacity: High (about 11.6 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2wHydrologic Soil Group: B

Typical profile0 to 10 inches: Silt loam10 to 60 inches: Silt loam

Ld—Lindside cherty silt loam, phosphatic


Map Unit CompositionLobelville and similar soils: 90 percentMinor components: 10 percent

Description of Lobelville

SettingLandform: Flood plainsLandform position (three-dimensional): TreadParent material: Loamy alluvium over gravelly alluvium

Properties and qualitiesSlope: 0 to 5 percentDepth to restrictive feature: More than 80 inchesDrainage class: Moderately well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.60 to 2.00 in/hr)


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Depth to water table: About 18 to 30 inchesFrequency of flooding: OccasionalFrequency of ponding: NoneAvailable water capacity: Moderate (about 6.8 inches)

Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2wHydrologic Soil Group: C

Typical profile0 to 12 inches: Gravelly silt loam12 to 60 inches: Gravelly silt loam

Minor Components

MelvinPercent of map unit: 8 percentLandform: Depressions on flood plains

Minor componentsPercent of map unit: 2 percent

Lp—Lindside silt loam, phosphatic


Map Unit CompositionLindside and similar soils: 92 percentMinor components: 8 percent

Description of Lindside

SettingLandform: Flood plainsLandform position (three-dimensional): TreadParent material: Loamy alluvium derived from interbedded sedimentary rock

Properties and qualitiesSlope: 0 to 5 percentDepth to restrictive feature: More than 80 inchesDrainage class: Moderately well drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.20 to 2.00 in/hr)Depth to water table: About 18 to 30 inchesFrequency of flooding: OccasionalFrequency of ponding: NoneAvailable water capacity: Very high (about 12.3 inches)


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Interpretive groupsFarmland classification: All areas are prime farmlandLand capability (nonirrigated): 2wHydrologic Soil Group: C

Typical profile0 to 12 inches: Silt loam12 to 60 inches: Silt loam

Minor Components

MelvinPercent of map unit: 8 percentLandform: Depressions on flood plains

MbB2—Maury silt loam, 2 to 5 percent slopes, eroded


Map Unit CompositionMaury and similar soils: 100 percent

Description of Maury

SettingLandform: FlatsLandform position (three-dimensional): RiseParent material: Loess over clayey residuum and/or alluvium derived from limestone






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20 to 60 inches: Silty clay

Me—Melvin silt loam, phosphatic


Map Unit CompositionMelvin and similar soils: 100 percent

Description of Melvin

SettingLandform: DepressionsLandform position (three-dimensional): DipParent material: Loamy alluvium derived from interbedded sedimentary rock

Properties and qualitiesSlope: 0 to 2 percentDepth to restrictive feature: More than 80 inchesDrainage class: Poorly drainedCapacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.60 to 2.00 in/hr)Depth to water table: About 0 to 12 inchesFrequency of flooding: FrequentFrequency of ponding: FrequentAvailable water capacity: Very high (about 12.1 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 5wHydrologic Soil Group: D

Typical profile0 to 8 inches: Silt loam8 to 16 inches: Silt loam16 to 60 inches: Silt loam

MhE2—Mimosa cherty silt loam, 20 to 30 percent slopes, eroded



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Map Unit CompositionMimosa and similar soils: 100 percent

Description of Mimosa

SettingLandform: HillslopesLandform position (three-dimensional): Side slopeParent material: Clayey residuum weathered from limestone

Properties and qualitiesSlope: 20 to 30 percentDepth to restrictive feature: 40 to 60 inches to lithic bedrockDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately

low (0.00 to 0.06 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 7.2 inches)


Typical profile0 to 8 inches: Gravelly silt loam8 to 15 inches: Clay15 to 55 inches: Clay55 to 65 inches: Bedrock

MkE3—Mimosa cherty silty clay, 20 to 30 percent slopes, severely eroded


Map Unit CompositionMimosa, severely eroded, and similar soils: 100 percent

Description of Mimosa, Severely Eroded


Properties and qualitiesSlope: 20 to 30 percent


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Depth to restrictive feature: 40 to 60 inches to lithic bedrockDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately



Typical profile0 to 4 inches: Silty clay4 to 46 inches: Clay46 to 56 inches: Bedrock

MnE—Mimosa very rocky soils, 20 to 40 percent slopes


Map Unit CompositionMimosa and similar soils: 70 percentRock outcrop: 25 percentMinor components: 5 percent




low (0.00 to 0.06 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: RareAvailable water capacity: Moderate (about 7.5 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 7s


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Hydrologic Soil Group: C

Typical profile0 to 8 inches: Silt loam8 to 16 inches: Silty clay16 to 55 inches: Clay55 to 65 inches: Bedrock

Description of Rock Outcrop

Typical profile0 to 10 inches: Bedrock

Minor Components


MoD—Mimosa and Ashwood very rocky soils, 5 to 20 percent slopes


Map Unit CompositionMimosa and similar soils: 40 percentAshwood and similar soils: 35 percentRock outcrop: 25 percent





Interpretive groupsFarmland classification: Not prime farmland


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Land capability (nonirrigated): 6sHydrologic Soil Group: C

Typical profile0 to 8 inches: Silt loam8 to 16 inches: Silty clay16 to 55 inches: Clay55 to 65 inches: Bedrock

Description of Ashwood



low (0.00 to 0.06 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Low (about 3.9 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 6sHydrologic Soil Group: C

Typical profile0 to 11 inches: Silty clay loam11 to 26 inches: Clay26 to 36 inches: Bedrock



Rc—Rockland



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Map Unit CompositionRock outcrop: 60 percentGladeville and similar soils: 30 percentMinor components: 10 percent


Properties and qualitiesSlope: 3 to 30 percentDepth to restrictive feature: 0 inches to lithic bedrockCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately

low (0.00 to 0.06 in/hr)Frequency of ponding: Rare

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 8sHydrologic Soil Group: D


Description of Gladeville

SettingLandform: HillslopesLandform position (three-dimensional): Side slopeParent material: Flaggy residuum weathered from limestone


low (0.00 to 0.06 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Very low (about 0.8 inches)

Interpretive groupsFarmland classification: Not prime farmlandLand capability (nonirrigated): 7sHydrologic Soil Group: D

Typical profile0 to 10 inches: Very flaggy silty clay loam10 to 20 inches: Bedrock

Minor Components



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SrC3—Stiversville clay loam, 5 to 12 percent slopes, severely eroded


Map Unit CompositionStiversville, severely eroded, and similar soils: 100 percent

Description of Stiversville, Severely Eroded

SettingLandform: FlatsLandform position (three-dimensional): RiseParent material: Loamy residuum weathered from limestone, sandstone, and shale

Properties and qualitiesSlope: 5 to 12 percentDepth to restrictive feature: 24 to 48 inches to paralithic bedrockDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately

high (0.00 to 0.20 in/hr)Depth to water table: More than 80 inchesFrequency of flooding: NoneFrequency of ponding: NoneAvailable water capacity: Moderate (about 6.2 inches)


Typical profile0 to 4 inches: Clay loam4 to 16 inches: Clay loam16 to 40 inches: Channery clay loam40 to 50 inches: Bedrock

StB2—Stiversville silt loam, 2 to 5 percent slopes, eroded



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SettingLandform: FlatsLandform position (three-dimensional): TalfParent material: Loamy residuum weathered from limestone, sandstone, and shale

Properties and qualitiesSlope: 2 to 5 percentDepth to restrictive feature: 39 to 59 inches to paralithic bedrockDrainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately



Typical profile0 to 8 inches: Silt loam8 to 20 inches: Clay loam20 to 45 inches: Channery clay loam45 to 55 inches: Bedrock

StC2—Stiversville silt loam, 5 to 12 percent slopes, eroded




SettingLandform: FlatsLandform position (three-dimensional): RiseParent material: Loamy residuum weathered from limestone, sandstone, and shale

Properties and qualitiesSlope: 5 to 12 percentDepth to restrictive feature: 39 to 59 inches to paralithic bedrock


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Drainage class: Well drainedCapacity of the most limiting layer to transmit water (Ksat): Very low to moderately



Typical profile0 to 8 inches: Silt loam8 to 20 inches: Clay loam20 to 45 inches: Channery clay loam45 to 55 inches: Bedrock

W—Water

Map Unit CompositionWater: 100 percent


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Soil Information for All Uses

Suitabilities and Limitations for UseThe Suitabilities and Limitations for Use section includes various soil interpretationsdisplayed as thematic maps with a summary table for the soil map units in the selectedarea of interest. A single value or rating for each map unit is generated by aggregatingthe interpretive ratings of individual map unit components. This aggregation processis defined for each interpretation.

Land Classifications

Land Classifications are specified land use and management groupings that areassigned to soil areas because combinations of soil have similar behavior for specifiedpractices. Most are based on soil properties and other factors that directly influencethe specific use of the soil. Example classifications include ecological siteclassification, farmland classification, irrigated and nonirrigated land capabilityclassification, and hydric rating.

Farmland Classification

Farmland classification identifies map units as prime farmland, farmland of statewideimportance, farmland of local importance, or unique farmland. It identifies the locationand extent of the soils that are best suited to food, feed, fiber, forage, and oilseedcrops. NRCS policy and procedures on prime and unique farmlands are published inthe "Federal Register," Vol. 43, No. 21, January 31, 1978.

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Custom Soil Resource ReportMap—Farmland Classification

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MAP LEGENDArea of Interest (AOI)

Area of Interest (AOI)

SoilsSoil Rating Polygons

Not prime farmland

All areas are primefarmlandPrime farmland if drained

Prime farmland ifprotected from flooding ornot frequently floodedduring the growing seasonPrime farmland if irrigated

Prime farmland if drainedand either protected fromflooding or not frequentlyflooded during the growingseasonPrime farmland if irrigatedand drainedPrime farmland if irrigatedand either protected fromflooding or not frequentlyflooded during the growingseason

Prime farmland ifsubsoiled, completelyremoving the rootinhibiting soil layerPrime farmland if irrigatedand the product of I (soilerodibility) x C (climatefactor) does not exceed 60Prime farmland if irrigatedand reclaimed of excesssalts and sodiumFarmland of statewideimportanceFarmland of localimportanceFarmland of uniqueimportanceNot rated or not available

Soil Rating LinesNot prime farmland



Prime farmland if drainedand either protected fromflooding or not frequentlyflooded during the growingseasonPrime farmland if irrigatedand drainedPrime farmland if irrigatedand either protected fromflooding or not frequentlyflooded during the growingseasonPrime farmland ifsubsoiled, completelyremoving the rootinhibiting soil layerPrime farmland if irrigatedand the product of I (soilerodibility) x C (climatefactor) does not exceed 60

Prime farmland if irrigatedand reclaimed of excesssalts and sodiumFarmland of statewideimportanceFarmland of localimportanceFarmland of uniqueimportanceNot rated or not available

Soil Rating PointsNot prime farmland



Prime farmland if drainedand either protected fromflooding or not frequentlyflooded during the growingseason

Prime farmland ifirrigated and drainedPrime farmland ifirrigated and eitherprotected from floodingor not frequently floodedduring the growingseasonPrime farmland ifsubsoiled, completelyremoving the rootinhibiting soil layerPrime farmland ifirrigated and the productof I (soil erodibility) x C(climate factor) does notexceed 60Prime farmland ifirrigated and reclaimed ofexcess salts and sodiumFarmland of statewideimportanceFarmland of localimportanceFarmland of uniqueimportanceNot rated or not available

Water Features


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MAP INFORMATION

Streams and Canals

TransportationRails

Interstate Highways

US Routes

Major Roads

Local Roads














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Table—Farmland Classification

Farmland Classification— Summary by Map Unit — Williamson County, Tennessee (TN187)

Map unit symbol Map unit name Rating Acres in AOI Percent of AOI

ArB Armour silt loam, 2 to 5percent slopes

All areas are primefarmland

0.7 0.4%

ArB2 Armour silt loam, 2 to 5percent slopes, eroded


8.7 5.0%

BrB2 Braxton cherty silt loam, 2to 5 percent slopes,eroded


2.7 1.6%

BrC2 Braxton cherty silt loam, 5to 12 percent slopes,eroded

Not prime farmland 5.4 3.1%

BrD2 Braxton cherty silt loam,12 to 20 percentslopes, eroded


CaB Captina silt loam,phosphatic, 2 to 5percent slopes


3.1 1.8%

CfD2 Culleoka flaggy loam, 12to 20 percent slopes,eroded


CkD Culleoka silt loam, 12 to20 percent slopes


CkE Culleoka silt loam, 20 to35 percent slopes


DeD Dellrose cherty silt loam,12 to 20 percent slopes


DeE Dellrose cherty silt loam,20 to 30 percent slopes


DeF Dellrose cherty silt loam,30 to 40 percent slopes


HpB Humphreys gravelly siltloam, 2 to 5 percentslopes


7.1 4.1%

HpC Humphreys gravelly siltloam, 5 to 12 percentslopes


Hu Huntington silt loam,phosphatic


5.1 2.9%

Ld Lindside cherty silt loam,phosphatic


7.1 4.1%

Lp Lindside silt loam,phosphatic


24.5 14.1%

MbB2 Maury silt loam, 2 to 5percent slopes, eroded


0.0 0.0%

Me Melvin silt loam,phosphatic



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Farmland Classification— Summary by Map Unit — Williamson County, Tennessee (TN187)

Map unit symbol Map unit name Rating Acres in AOI Percent of AOI

MhE2 Mimosa cherty silt loam,20 to 30 percentslopes, eroded


MkE3 Mimosa cherty silty clay,20 to 30 percentslopes, severelyeroded


MnE Mimosa very rocky soils,20 to 40 percent slopes


MoD Mimosa and Ashwoodvery rocky soils, 5 to 20percent slopes


Rc Rockland Not prime farmland 14.1 8.1%

SrC3 Stiversville clay loam, 5 to12 percent slopes,severely eroded


StB2 Stiversville silt loam, 2 to5 percent slopes,eroded


23.7 13.7%

StC2 Stiversville silt loam, 5 to12 percent slopes,eroded


W Water Not prime farmland 0.0 0.0%


Rating Options—Farmland Classification

Aggregation Method: No Aggregation Necessary

Tie-break Rule: Lower

Sanitary Facilities

Sanitary Facilities interpretations are tools designed to guide the user in site selectionfor the safe disposal of sewage and solid waste. Example interpretations include septictank absorption fields, sewage lagoons, and sanitary landfills.

ENG - Conventional On-Site Septic Systems (TN)

This table shows the degree and kind of soil limitations that affect conventional on-site septic systems based on the criteria provided by the Tennessee Department ofEnvironment and Conservation. The ratings are both verbal and numerical. Ratingclass terms indicate the extent to which the soils are limited by all of the soil featuresthat affect these uses. Slightly limited indicates that the soil has features that aregenerally favorable for the specified use. The probability is high that large enoughareas with these soils and landscape characteristics might be found in the mappedareas and approved for conventional septic systems in Tennessee. Moderately limited


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indicates that the soil has some features that are moderately favorable for the specifieduse. The probability is moderate that areas with these soils and landscapecharacteristics might be approved for conventional septic systems in Tennessee. Inmany cases, a special design or non conventional septic system may help toovercome the moderate soil or landscape limitations. Very limited indicates that thesoil has one or more features that are generally unfavorable for the specified use. Theprobability is low that areas with these soils and landscape characteristics might beapproved for conventional septic systems in Tennessee. The limitations for aconventional septic system generally are difficult to overcome without major soilreclamation, and may or may not be favorable for other non conventional on-sitesystem designs.

Numerical ratings in the tables indicate the severity of individual limitations. Theratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicategradations between the point at which a soil feature has the greatest negative impacton the use (1.00) and the point at which the soil feature is not a limitation (0.00).

Tennessee conventional systems are areas in which effluent from a septic tank isdistributed into the soil through subsurface tiles or perforated pipe. Only that part ofthe soil between depths of 60 to 180 centimeters (24 to 71 inches) is evaluated. Theratings are based on the soil properties that affect absorption of the effluent,construction and maintenance of the system, and public health. Permeability, depthto a water table, depth to bedrock or a fragipan affect absorption of the effluent.Depression that are moderately well drained or wetter were rated severe and fillmaterial were not rated. Excessive slope greater than 30 percent may cause lateralseepage and surfacing of the effluent in downslope areas. Flooding and ponding arenot considered for Tennessee conventional septic systems, but are considered in theevaluations for homesites instead.

This report should be used only as a general guide to soil limitations for TennesseeConventional Septic Systems. The information is not site-specific and does not in anyway eliminate or replace the need for onsite investigation of the soils, or for testingand analysis by personnel experienced in the design and construction of engineeringworks. Information in this table is intended for general land use planning, for evaluatingland use alternatives, and for planning on-site investigations prior to approval anddesign of a system. Because of the scale that the maps were made, small areas ofdifferent soils are included within most areas identified in the map unit name as aparticular soil or soils. In addition, the limitations ratings are based on a representativedepth for some soil properties, within the range of depths that was mapped. Areas ofsimilar soils with different depths to these soil features will occur within all mappedareas and could have different limitations. These can only be determined and locatedby an on-site investigation.

Government ordinances and regulations that restrict certain land uses or imposespecific design criteria were not considered in preparing the information in this table.Local ordinances and regulations must be fully considered in planning, site selection,and design. Contact Tennessee Department of Environment and Conservation formore information about conventional and alternative septic systems in Tennessee.


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MAP LEGEND MAP INFORMATION

Area of Interest (AOI)Area of Interest (AOI)

SoilsSoil Rating Polygons

Very limited

Moderately limited

Slightly limited

Not rated or not available

Soil Rating LinesVery limited

Moderately limited

Slightly limited


Soil Rating PointsVery limited

Moderately limited

Slightly limited


Water FeaturesStreams and Canals

TransportationRails

Interstate Highways

US Routes

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Tables—ENG - Conventional On-Site Septic Systems (TN)

ENG - Conventional On-Site Septic Systems (TN)— Summary by Map Unit — Williamson County, Tennessee (TN187)

Map unit symbol Map unit name Rating Componentname (percent)

Rating reasons(numeric values)

Acres in AOI Percent of AOI

ArB Armour silt loam,2 to 5 percentslopes

Slightly limited Armour (100%) Slight slopelimitation (0.04)

0.7 0.4%

ArB2 Armour silt loam,2 to 5 percentslopes, eroded

Slightly limited Armour (100%) Slight slopelimitation (0.04)

8.7 5.0%

BrB2 Braxton cherty siltloam, 2 to 5percent slopes,eroded

Very limited Braxton (100%) Percolation (1.00) 2.7 1.6%

Slight slopelimitation (0.04)

BrC2 Braxton cherty siltloam, 5 to 12percent slopes,eroded



BrD2 Braxton cherty siltloam, 12 to 20percent slopes,eroded



CaB Captina silt loam,phosphatic, 2to 5 percentslopes

Very limited Captina (100%) Depth tosaturated zone(1.00)

3.1 1.8%

Shallow depth tofragipan (0.99)


CfD2 Culleoka flaggyloam, 12 to 20percent slopes,eroded

Slightly limited Sandhill (100%) Moderate depthto bedrock(0.70)

2.3 1.3%


CkD Culleoka siltloam, 12 to 20percent slopes

Slightly limited Stiversville(100%)


1.8 1.0%

CkE Culleoka siltloam, 20 to 35percent slopes

Very limited Stiversville, verydeep (100%)

Too steep (0.99) 4.1 2.3%

DeD Dellrose chertysilt loam, 12 to20 percentslopes

Slightly limited Dellrose (100%) Slight slopelimitation (0.56)

4.1 2.4%

DeE Dellrose chertysilt loam, 20 to30 percentslopes

Moderatelylimited

Dellrose (100%) Moderate slopelimitation (0.94)

5.1 2.9%

DeF Dellrose chertysilt loam, 30 to40 percentslopes

Very limited Dellrose (100%) Too steep (1.00) 3.9 2.2%


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HpB Humphreysgravelly siltloam, 2 to 5percent slopes

Slightly limited Humphreys(90%)


7.1 4.1%

Depth tosaturated zone(0.02)

Armour (5%) Slight slopelimitation (0.04)

Ocana (2%) Depth tosaturated zone(0.26)


HpC Humphreysgravelly siltloam, 5 to 12percent slopes

Slightly limited Humphreys(90%)


9.5 5.5%

Depth tosaturated zone(0.02)

Armour (5%) Slight slopelimitation (0.18)

Skidmore (2%) Slight slopelimitation (0.18)

Bedrock lower inthe soil (0.00)

Hu Huntington siltloam,phosphatic

Slightly limited Huntington(100%)


5.1 2.9%

Ld Lindside chertysilt loam,phosphatic

Moderatelylimited

Lobelville (90%) Depth tosaturated zone(0.96)

7.1 4.1%


Lp Lindside silt loam,phosphatic

Moderatelylimited

Lindside (92%) Depth tosaturated zone(0.96)

24.5 14.1%


MbB2 Maury silt loam, 2to 5 percentslopes, eroded

Slightly limited Maury (100%) Slight slopelimitation (0.04)

0.0 0.0%

Me Melvin silt loam,phosphatic

Very limited Melvin (100%) Depth tosaturated zone(1.00)

13.7 7.9%

Depressionaltopography(1.00)



47





MhE2 Mimosa cherty siltloam, 20 to 30percent slopes,eroded

Very limited Mimosa (100%) Percolation (1.00) 4.5 2.6%

Moderate slopelimitation (0.94)


MkE3 Mimosa chertysilty clay, 20 to30 percentslopes,severelyeroded

Very limited Mimosa, Severelyeroded (100%)

Percolation (1.00) 3.7 2.2%

Moderate slopelimitation (0.94)

Moderate depthto bedrock(0.77)

MnE Mimosa veryrocky soils, 20to 40 percentslopes


Too steep (0.99)


MoD Mimosa andAshwood veryrocky soils, 5 to20 percentslopes




Ashwood (35%) Shallow depth tobedrock (1.00)

Percolation (1.00)


Rc Rockland Not rated Rock outcrop(60%)

14.1 8.1%

Minorcomponents(10%)

SrC3 Stiversville clayloam, 5 to 12percent slopes,severelyeroded

Moderatelylimited

Stiversville,Severelyeroded (100%)


0.4 0.2%


StB2 Stiversville siltloam, 2 to 5percent slopes,eroded

Moderatelylimited

Stiversville(100%)


23.7 13.7%


StC2 Stiversville siltloam, 5 to 12percent slopes,eroded

Moderatelylimited

Stiversville(100%)


5.3 3.0%


W Water Not rated Water (100%) 0.0 0.0%



48

ENG - Conventional On-Site Septic Systems (TN)— Summary by Rating Value

Rating Acres in AOI Percent of AOI

Moderately limited 66.1 38.1%

Very limited 53.8 31.1%

Slightly limited 39.3 22.7%

Null or Not Rated 14.1 8.1%


Rating Options—ENG - Conventional On-Site Septic Systems (TN)

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: Higher


49

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http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_054262






http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/landuse/forestry/pub/

http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/landuse/forestry/pub/

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/landuse/rangepasture/?cid=stelprdb1043084

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/landuse/rangepasture/?cid=stelprdb1043084

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United States Department of Agriculture, Natural Resources Conservation Service.2006. Land resource regions and major land resource areas of the United States, theCaribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296.http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053624

United States Department of Agriculture, Soil Conservation Service. 1961. Landcapability classification. U.S. Department of Agriculture Handbook 210. http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf


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http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/scientists/?cid=nrcs142p2_054242

http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/scientists/?cid=nrcs142p2_054242




http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf

http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf

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