HomeMy WebLinkAboutSDP201700009 Study 2017-02-220
RECEIVED
MAR 0 2 20+7
COMMUNITY
DEVELOPMENT
Soils Report
For
Boyd Tavern Market - Initial Site Plan
Tax Map ID: 09400-00-00-03900
Item Number: SDP201700009
Prepared: February 22, 2017
Thomas Jefferson Soil & Water Conservation District
"To exercise leadership in promoting natural resource protection. "
706 Forest Street, Suite G
Charlottesville, Virginia 22903
Phone: (434) 975-0224
37° 5949'N
37" 59 37 N
3 Soil Map—Albemarle County, Virginia ;
(Boyd Tavem Market - Initial Site Plan)
733110 73347U 733590 733590 MEW 733710 73377(1 `1'ri"ti 733120 73ffi0
3
r`
Map Scale: 1:2,630 sprinted m A landScape (11"x &S") SheEt
n Meters
M
0 35 70 140 210
A l0
o ,� � ,m
Map projection: Web Meter Corner �nafa: WG584 Edge tics: 113M Zane 17N WGS84
Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 1 of 3
Soil Map—Albemarle County, Virginia
(Boyd Tavern Market - Initial Site Plan)
MAP LEGEND
MAP INFORMATION
Area or Interest (AOIJ
Spoil Area
The soil surveys that comprise your AOI were mapped at
Area of Interest (AOI)
Stony Spot
1:15,800.
Soils
`i-3
very Stony Spot
Warning: Soil Map may not be valid at this. scale.
Soil Map Unit Polygons
o,
Wet spot
Enlargement of maps beyond the scale of mapping can cause
y
Soil Map Unit Lines
misunderstanding of the detail of mapping and accuracy of soil
Other
line placement. The maps do not show the small areas of
®
sail Map unit Points
.�
Special Line Features
contrasting soils that could have been shown at a more detailed
Special Point Features
scale.
Blowout
Water Features
Streams and Canals
Please rely on the bar scale on each map sheet for map
®
Burrow Pd
measurements.
Transportation
)Q
Clay Spot
a -F+
Rails
Source of Map: Natural Resources Conservation Service
U
Closed Depression
Web Soil Survey URL:
err
Interstate Highways
Coordinate System: Web Mercator (EPSG:3857)
Gravel Pit
US Routes
Maps from the Web Soil Survey are based on the Web Mercator
Gravelly Spot
Major Roads
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
40
Landfill
Local Roads
Albers equal-area conic projection, should be used if more
Lava Lava Flow
accurate calculations of distance or area are required.
A.
Marsh or swamp
Aerial Photography
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Mine or Quarry
Soil Survey Area: Albemarle County, Virginia
Miscellaneous Water
Survey Area Data: Version 10, Dec 11, 2013
Perennial Water
Soil map units are labeled (as space allows) for map scales
�-
Rock Outcrop
1:50,000 or larger.
+
Saline Spot
Date(s) aerial images were photographed: May 10, 2010—Jul 4,
2010
• •
Sandy Spot
The orthophato or other base map on which the soil lines were
�,
Severely Eroded Spot
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
0
Sinkhole
shifting of map unit boundaries may be evident.
Slide or Slip
Sodic Spot
us 114 Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 2 of 3
Soil Map—Albemarle County, Virginia
Map Unit Legend
Boyd Tavern Market - Initial Site Plan
Albemarle County, Virginia (VA003)
Map !left Symbol
Map Unit Name
Acres in AOI
Percent of AOI
62B
Nason silt loam, 2 to 7 percent
slopes
1.5
11.9%
62C
Nason silt loam, 7 to 15
percent slopes
7.2
55.9%'
80B
Tatum silt loam, 2 to 7 percent
slopes
4.1
32.2%
Totals for Area of Interest
12.9
100.0%
USDA Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 3 of 3
Map Unit Description (Brief, Generated) --Albemarle County, Virginia
Map Unit Description (Brief, Generated)
Boyd Tavern Market - Initial Site Plan
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions in this
report, along with the maps, 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
more major kinds of soil or miscellaneous areas. A map unit is identified and
named according to the taxonomic classification of the dominant soils. Within a
taxonomic class 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 variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is
made up of the soils or miscellaneous areas for which it is named and some
minor components that belong to taxonomic classes other than those of the
major soils.
The Map Unit Description (Brief, Generated) report displays a generated
description of the major soils that occur in a map unit. Descriptions of non -soil
(miscellaneous areas) and minor map unit components are not included. This
description is generated from the underlying soil attribute data.
Additional information about the map units described in this report is available in
other Soil Data Mart reports, which give properties of the soils and the limitations,
capabilities, and potentials for many uses. Also, the narratives that accompany
the Soil Data Mart reports define some of the properties included in the map unit
descriptions.
Report—Map Unit Description (Brief, Generated)
Albemarle County, Virginia
Map Unit: 62B—Nason silt loam, 2 to 7 percent slopes
Component: Nason (80%)
The Nason component makes up 80 percent of the map unit. Slopes are 2 to 7
percent. This component is on uplands, interfluves. The parent material consists
of residuum weathered from serecite schist. Depth to a root restrictive layer,
bedrock, paralithic, is 40 to 60 inches. The natural drainage class is well drained.
Water movement in the most restrictive layer is moderately high. Available water
to a depth of 60 inches is moderate. Shrink -swell potential is moderate. This soil
is not flooded. It is not ponded. There is no zone of water saturation within a
depth of 72 inches. Organic matter content in the surface horizon is about 2
percent. Nonirrigated land capability classification is 2e. This soil does not meet
hydric criteria.
USDA Natural Resources Web Soil Survey 2/22/2017
I" Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description (Brief, Generated) ---Albemarle County, Virginia
Map Unit: 62C—Nason silt loam, 7 to 15 percent slopes
Component: Nason (80%)
Boyd Tavern Market - Initial Site Plan
The Nason component makes up 80 percent of the map unit. Slopes are 7 to 15
percent. This component is on uplands, interfluves. The parent material consists
of residuum weathered from serecite schist. Depth to a root restrictive layer,
bedrock, paralithic, is 40 to 60 inches. The natural drainage class is well drained.
Water movement in the most restrictive layer is moderately high. Available water
to a depth of 60 inches is moderate. Shrink -swell potential is moderate. This soil
is not flooded. It is not ponded. There is no zone of water saturation within a
depth of 72 inches. Organic matter content in the surface horizon is about 2
percent. Nonirrigated land capability classification is 3e. This soil does not meet
hydric criteria.
Map Unit: 8013—Tatum silt loam, 2 to 7 percent slopes
Component: Tatum (80%)
The Tatum component makes up 80 percent of the map unit. Slopes are 2 to 7
percent. This component is on interfluves, uplands. The parent material consists
of residuum weathered from serecite schist. Depth to a root restrictive layer,
bedrock, paralithic, is 40 to 60 inches. The natural drainage class is well drained.
Water movement in the most restrictive layer is moderately high. Available water
to a depth of 60 inches is moderate. Shrink -swell potential is moderate. This soil
is not flooded. It is not ponded. There is no zone of water saturation within a
depth of 72 inches. Organic matter content in the surface horizon is about 1
percent. Nonirrigated land capability classification is 2e. This soil does not meet
hydric criteria.
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey 2/22/2017
�r Conservation Service National Cooperative Soil Survey Page 2 of 2
Dwellings and Small Commercial Buildings ---Albemarle County, Virginia Boyd Tavern Market - Initial Site Plan
Dwellings and Small Commercial Buildings
Soil properties influence the development of building sites, including the selection
of the site, the design of the structure, construction, performance after
construction, and maintenance. This table shows the degree and kind of soil
limitations that affect dwellings and small commercial buildings.
The ratings in the table are both verbal and numerical. Rating class terms
indicate the extent to which the soils are limited by all of the soil features that
affect building site development. Not limited indicates that the soil has features
that are very favorable for the specified use. Good performance and very low
maintenance can be expected. Somewhat limited indicates that the soil has
features that are moderately favorable for the specified use. The limitations can
be overcome or minimized by special planning, design, or installation. Fair
performance and moderate maintenance can be expected. Very limited indicates
that the soil has one or more features that are unfavorable for the specified use.
The limitations generally cannot be overcome without major soil reclamation,
special design, or expensive installation procedures. Poor performance and high
maintenance can be expected.
Numerical ratings in the table indicate the severity of individual limitations. The
ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate
gradations between the point at which a soil feature has the greatest negative
impact on the use (1.00) and the point at which the soil feature is not a limitation
(0.00).
Dwellings are single-family houses of three stories or less. For dwellings without
basements, the foundation is assumed to consist of spread footings of reinforced
concrete built on undisturbed soil at a depth of 2 feet or at the depth of maximum
frost penetration, whichever is deeper. For dwellings with basements, the
foundation is assumed to consist of spread footings of reinforced concrete built
on undisturbed soil at a depth of about 7 feet. The ratings for dwellings are based
on the soil properties that affect the capacity of the soil to support a load without
movement and on the properties that affect excavation and construction costs.
The properties that affect the load -supporting capacity include depth to a water
table, ponding, flooding, subsidence, linear extensibility (shrink -swell potential),
and compressibility. Compressibility is inferred from the Unified classification. The
properties that affect the ease and amount of excavation include depth to a water
table, ponding, flooding, slope, depth to bedrock or a cemented pan, hardness of
bedrock or a cemented pan, and the amount and size of rock fragments.
USDA Natural Resources Web Soil Survey 2/22/2017
0" Conservation Service National Cooperative Soil Survey Page 1 of 3
Dwellings and Small Commercial Buildings ---Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Small commercial buildings are structures that are less than three stories high
and do not have basements. The foundation is assumed to consist of spread
footings of reinforced concrete built on undisturbed soil at a depth of 2 feet or at
the depth of maximum frost penetration, whichever is deeper. The ratings are
based on the soil properties that affect the capacity of the soil to support a load
without movement and on the properties that affect excavation and construction
costs. The properties that affect the load -supporting capacity include depth to a
water table, ponding, flooding, subsidence, linear extensibility (shrink -swell
potential), and compressibility (which is inferred from the Unified classification).
The properties that affect the ease and amount of excavation include flooding,
depth to a water table, ponding, slope, depth to bedrock or a cemented pan,
hardness of bedrock or a cemented pan, and the amount and size of rock
fragments.
Information in this table is intended for land use planning, for evaluating land use
alternatives, and for planning site investigations prior to design and construction.
The information, however, has limitations. For example, estimates and other data
generally apply only to that part of the soil between the surface and a depth of 5
to 7 feet. Because of the map scale, small areas of different soils may be
included within the mapped areas of a specific soil.
The information is not site specific and does not eliminate the need for onsite
investigation of the soils or for testing and analysis by personnel experienced in
the design and construction of engineering works.
Government ordinances and regulations that restrict certain land uses or impose
specific design criteria were not considered in preparing the information in this
table. Local ordinances and regulations should be considered in planning, in site
selection, and in design.
Report—Dwellings and Small Commercial Buildings
[Onsite investigation may be needed to validate the interpretations in this table
and to confirm the identity of the soil on a given site. The numbers in the value
columns range from 0.01 to 1.00. The larger the value, the greater the potential
limitation. The table shows only the top five limitations for any given soil. The soil
may have additional limitations]
Dwellings and Small Commercial Buildings -Albemarle County, Virginia
Map symbol and soil
Pct. of
Dwellings without
Dwellings with basements
Small commercial buildings
name
map
basements
unit
Rating class and
Value
Rating class and
Value
Rating class and
Value
limiting features
limiting features
limiting features
62B—Nason silt loam,
2 to 7 percent
slopes
Nason
80
Somewhat limited
Somewhat limited
Somewhat limited
Shrink -swell
0.47
Shrink -swell
0.10
Shrink -swell
0.47
Slope
0.13
Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 2 of 3
Dwellings and Small Commercial Buildings ---Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Dwellings and Small Commercial Buildings Albemarle County, Virginia
Map symbol and soil
name
Pct of
map
unit
Dwellings without
basements
Dwellings with basements
Small commercial buildings
Rating class and
limiting features
Value
Rating class and
limiting features
Value
Rating class and
limiting features
Value
62C—Nason silt loam,
7 to 15 percent
slopes
Nason
80
Somewhat limited
Somewhat limited
Very limited
Shrink -swell
0.47
Slope
0.37
Slope
1.00
Slope
0.37
Shrink -swell
0.10
Shrink -swell
0.47
SOB—Tatum silt loam,
2 to 7 percent
slopes
Tatum
80
Somewhat limited
Somewhat limited
Somewhat limited
Shrink -swell
0.50
Shrink -swell
0.50
Shrink -swell
0.50
Slope
0.13
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey 2/22/2017
■� Conservation Service National Cooperative Soil Survey Page 3 of 3
Roads and Streets, Shallow Excavations, and Lawns and Landscaping ---Albemarle County,
Virginia
Boyd Tavern Market - Initial Site Plan
Roads and Streets, Shallow Excavations, and Lawns and
Landscaping
Soil properties influence the development of building sites, including the selection
of the site, the design of the structure, construction, performance after
construction, and maintenance. This table shows the degree and kind of soil
limitations that affect local roads and streets, shallow excavations, and lawns and
landscaping.
The ratings in the table are both verbal and numerical. Rating class terms
indicate the extent to which the soils are limited by all of the soil features that
affect building site development. Not limited indicates that the soil has features
that are very favorable for the specified use. Good performance and very low
maintenance can be expected. Somewhat limited indicates that the soil has
features that are moderately favorable for the specified use. The limitations can
be overcome or minimized by special planning, design, or installation. Fair
performance and moderate maintenance can be expected. Very limited indicates
that the soil has one or more features that are unfavorable for the specified use.
The limitations generally cannot be overcome without major soil reclamation,
special design, or expensive installation procedures. Poor performance and high
maintenance can be expected.
Numerical ratings in the table indicate the severity of individual limitations. The
ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate
gradations between the point at which a soil feature has the greatest negative
impact on the use (1.00) and the point at which the soil feature is not a limitation
(0.00).
Local roads and streets have an all-weather surface and carry automobile and
light truck traffic all year. They have a subgrade of cut or fill soil material; a base
of gravel, crushed rock, or soil material stabilized by lime or cement; and a
surface of flexible material (asphalt), rigid material (concrete), or gravel with a
binder. The ratings are based on the soil properties that affect the ease of
excavation and grading and the traffic -supporting capacity. The properties that
affect the ease of excavation and grading are depth to bedrock or a cemented
pan, hardness of bedrock or a cemented pan, depth to a water table, ponding,
flooding, the amount of large stones, and slope. The properties that affect the
traffic -supporting capacity are soil strength (as inferred from the AASHTO group
index number), subsidence, linear extensibility (shrink -swell potential), the
potential for frost action, depth to a water table, and ponding.
Shallow excavations are trenches or holes dug to a maximum depth of 5 or 6 feet
for graves, utility lines, open ditches, or other purposes. The ratings are based on
the soil properties that influence the ease of digging and the resistance to
sloughing. Depth to bedrock or a cemented pan, hardness of bedrock or a
cemented pan, the amount of large stones, and dense layers influence the ease
of digging, filling, and compacting. Depth to the seasonal high water table,
flooding, and ponding may restrict the period when excavations can be made.
Slope influences the ease of using machinery. Soil texture, depth to the water
table, and linear extensibility (shrink -swell potential) influence the resistance to
sloughing.
USDA Natural Resources
11" Conservation Service
Web Soil Survey
National Cooperative Soil Survey
2/22/2017
Page 1 of 3
Roads and Streets, Shallow Excavations, and Lawns and Landscaping ---Albemarle County,
Virginia
Boyd Tavern Market - Initial Site Plan
Lawns and landscaping require soils on which turf and ornamental trees and
shrubs can be established and maintained. Irrigation is not considered in the
ratings. The ratings are based on the soil properties that affect plant growth and
trafficability after vegetation is established. The properties that affect plant growth
are reaction; depth to a water table; ponding; depth to bedrock or a cemented
pan; the available water capacity in the upper 40 inches; the content of salts,
sodium, or calcium carbonate; and sulfidic materials. The properties that affect
trafficability are flooding, depth to a water table, ponding, slope, stoniness, and
the amount of sand, clay, or organic matter in the surface layer.
Information in this table is intended for land use planning, for evaluating land use
alternatives, and for planning site investigations prior to design and construction.
The information, however, has limitations. For example, estimates and other data
generally apply only to that part of the soil between the surface and a depth of 5
to 7 feet. Because of the map scale, small areas of different soils may be
included within the mapped areas of a specific soil.
The information is not site specific and does not eliminate the need for onsite
investigation of the soils or for testing and analysis by personnel experienced in
the design and construction of engineering works.
Government ordinances and regulations that restrict certain land uses or impose
specific design criteria were not considered in preparing the information in this
table. Local ordinances and regulations should be considered in planning, in site
selection, and in design.
Report—Roads and Streets, Shallow Excavations; and Lawns
and Landscaping
[Onsite investigation may be needed to validate the interpretations in this table
and to confirm the identity of the soil on a given site. The numbers in the value
columns range from 0.01 to 1.00. The larger the value, the greater the potential
limitation. The table shows only the top five limitations for any given soil. The soil
may have additional limitations]
Roads and Streets, Shallow Excavations, and Lawns and Landscaping—Albemarle County, Virginia
Map symbol and soil
Pct. of
Lawns and landscaping
Local roads and streets
Shallow excavations
name
map
unit
Rating class and
Value
Rating class and
Value
Rating class and
Value
limiting features
limiting features
limiting features
62B—Nason silt loam,
2 to 7 percent
slopes
Nason
80
Somewhat limited
Very limited
Somewhat limited
Low exchange
0.75
Low strength
1.00
Dusty
0.08
capacity
Shrink -swell
Dusty
0.08
0.47
Unstable excavation
0.01
walls
Natural Resources Web Soil Survey 2/22/2017
�� Conservation Service National Cooperative Soil Survey Page 2 of 3
Roads and Streets, Shallow Excavations, and Lawns and Landscaping --Albemarle County,
Virginia
Boyd Tavern Market - Initial Site Plan
Roads and Streets, Shallow Excavations, and Lawns and Landscaping–Albemarle County, Virginia
Map symbol and soil
Pct. of
Lawns and landscaping
Local roads and streets
Shallow excavations
name
map
unit
Rating class and
Value
Rating class and
Value
Rating class and
Value
limiting features
limiting features
limiting features
62C—Nason silt loam,
7 to 15 percent
slopes
Nason
80
Somewhat limited
Very limited
Somewhat limited
Low exchange
0.75
Low strength
1.00
Slope
0.37
capacity
Slope
0.37
Shrink -swell
0.47
Dusty
0.08
Dusty
0.08
Slope
0.37
Unstable excavation
0.01
walls
80B—Tatum silt loam,
2 to 7 percent
slopes
Tatum
80
Somewhat limited
Very limited
Somewhat limited
Low exchange
0.75
Low strength
1.00
Dusty
0.08
capacity
Dusty
0.08
Shrink -swell
0.50
Too clayey
0.05
Unstable excavation
0.01
walls
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
VIDA Natural Resources Web Soil Survey 2/22/2017
r Conservation Service National Cooperative Soil Survey Page 3 of 3
Soil Features --Albemarle County, Virginia
Soil Features
Boyd Tavern Market - Initial Site Plan
This table gives estimates of various soil features. The estimates are used in
land use planning that involves engineering considerations.
A restrictive layer is a nearly continuous layer that has one or more physical,
chemical, or thermal properties that significantly impede the movement of water
and air through the soil or that restrict roots or otherwise provide an unfavorable
root environment. Examples are bedrock, cemented layers, dense layers, and
frozen layers. The table indicates the hardness and thickness of the restrictive
layer, both of which significantly affect the ease of excavation. Depth to top is the
vertical distance from the soil surface to the upper boundary of the restrictive
layer.
Subsidence is the settlement of organic soils or of saturated mineral soils of very
low density. Subsidence generally results from either desiccation and shrinkage,
or oxidation of organic material, or both, following drainage. Subsidence takes
place gradually, usually over a period of several years. The table shows the
expected initial subsidence, which usually is a result of drainage, and total
subsidence, which results from a combination of factors.
Potential for frost action is the likelihood of upward or lateral expansion of the soil
caused by the formation of segregated ice lenses (frost heave) and the
subsequent collapse of the soil and loss of strength on thawing. Frost action
occurs when moisture moves into the freezing zone of the soil. Temperature,
texture, density, saturated hydraulic conductivity (Ksat), content of organic matter,
and depth to the water table are the most important factors considered in
evaluating the potential for frost action. It is assumed that the soil is not insulated
by vegetation or snow and is not artificially drained. Silty and highly structured,
clayey soils that have a high water table in winter are the most susceptible to
frost action. Well drained, very gravelly, or very sandy soils are the least
susceptible. Frost heave and low soil strength during thawing cause damage to
pavements and other rigid structures.
Risk of corrosion pertains to potential soil -induced electrochemical or chemical
action that corrodes or weakens uncoated steel or concrete. The rate of
corrosion of uncoated steel is related to such factors as soil moisture, particle -
size distribution, acidity, and electrical conductivity of the soil. The rate of
corrosion of concrete is based mainly on the sulfate and sodium content, texture,
moisture content, and acidity of the soil. Special site examination and design may
be needed if the combination of factors results in a severe hazard of corrosion.
The steel or concrete in installations that intersect soil boundaries or soil layers is
more susceptible to corrosion than the steel or concrete in installations that are
entirely within one kind of soil or within one soil layer.
For uncoated steel, the risk of corrosion, expressed as low, moderate, or high, is
based on soil drainage class, total acidity, electrical resistivity near field capacity,
and electrical conductivity of the saturation extract.
For concrete, the risk of corrosion also is expressed as low, moderate, or high. It
is based on soil texture, acidity, and amount of sulfates in the saturation extract.
Uapp Natural Resources Web Soil Survey 2/22/2017
�� Conservation Service National Cooperative Soil Survey Page 1 of 2
Soil Features—Albemarle County, Virginia
Report—Soil Features
Boyd Tavern Market - Initial Site Plan
Solt features—Albemarle County, Wrginia
Map symbol and
Restrictive Layer
Subsidence
Potential for frost
Risk of corrosion
soil name
action
Kind
Depth to
Thickness
Hardness
Initial
Total
Uncoated steel
Concrete
top
Low -RV-
Range
Low-
Low -
High
High
High
In
In
In
in
62B—Nason silt
loam, 2 to 7
percent slopes
Nason
Paralithic bedrock
40-
—
Moderately
—
—
None
Moderate
Moderate
50-60
cemented
62C—Nason silt
loam, 7 to 15
percent slopes
Nason
Paralithic bedrock
40-
—
Moderately
—
—
None
Moderate
Moderate
50-60
cemented
80B—Tatum silt
loam, 2 to 7
percent slopes
Tatum
Paralithic bedrock
40-
—
Moderately
—
—
None
High
Moderate
51-60
cemented
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey 2122/2017
Conservation Service National Cooperative Soil Survey Page 2 of 2
Physical Soil Properties --Albemarle County, Virginia
Physical Soil Properties
Boyd Tavern Market - Initial Site Plan
This table shows estimates of some physical characteristics and features that
affect soil behavior. These estimates are given for the layers of each soil in the
survey area. The estimates are based on field observations and on test data for
these and similar soils.
Depth to the upper and lower boundaries of each layer is indicated.
Particle size is the effective diameter of a soil particle as measured by
sedimentation, sieving, or micrometric methods. Particle sizes are expressed as
classes with specific effective diameter class limits. The broad classes are sand,
silt, and clay, ranging from the larger to the smaller.
Sand as a soil separate consists of mineral soil particles that are 0.05 millimeter
to 2 millimeters in diameter. In this table, the estimated sand content of each soil
layer is given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
Silt as a soil separate consists of mineral soil particles that are 0.002 to 0.05
millimeter in diameter. In this table, the estimated silt content of each soil layer is
given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
Clay as a soil separate consists of mineral soil particles that are less than 0.002
millimeter in diameter. In this table, the estimated clay content of each soil layer
is given as a percentage, by weight, of the soil material that is less than 2
millimeters in diameter.
The content of sand, silt, and clay affects the physical behavior of a soil. Particle
size is important for engineering and agronomic interpretations, for determination
of soil hydrologic qualities, and for soil classification.
The amount and kind of clay affect the fertility and physical condition of the soil
and the ability of the soil to adsorb cations and to retain moisture. They influence
shrink -swell potential, saturated hydraulic conductivity (Ksat), plasticity, the ease
of soil dispersion, and other soil properties. The amount and kind of clay in a soil
also affect tillage and earthmoving operations.
Moist bulk density is the weight of soil (ovendry) per unit volume. Volume is
measured when the soil is at field moisture capacity, that is, the moisture content
at 1/3- or 1/10 -bar (33kPa or 10kPa) moisture tension. Weight is determined after
the soil is dried at 105 degrees C. In the table, the estimated moist bulk density
of each soil horizon is expressed in grams per cubic centimeter of soil material
that is less than 2 millimeters in diameter. Bulk density data are used to compute
linear extensibility, shrink -swell potential, available water capacity, total pore
space, and other soil properties. The moist bulk density of a soil indicates the
pore space available for water and roots. Depending on soil texture, a bulk
density of more than 1.4 can restrict water storage and root penetration. Moist
bulk density is influenced by texture, kind of clay, content of organic matter, and
soil structure.
U_S_DA Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 1 of 5
Physical Soil Properties --Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a
saturated soil transmit water. The estimates in the table are expressed in terms
of micrometers per second. They are based on soil characteristics observed in
the field, particularly structure, porosity, and texture. Saturated hydraulic
conductivity (Ksat) is considered in the design of soil drainage systems and
septic tank absorption fields.
Available water capacity refers to the quantity of water that the soil is capable of
storing for use by plants. The capacity for water storage is given in inches of
water per inch of soil for each soil layer. The capacity varies, depending on soil
properties that affect retention of water. The most important properties are the
content of organic matter, soil texture, bulk density, and soil structure. Available
water capacity is an important factor in the choice of plants or crops to be grown
and in the design and management of irrigation systems. Available water
capacity is not an estimate of the quantity of water actually available to plants at
any given time.
Linear extensibility refers to the change in length of an unconfined clod as
moisture content is decreased from a moist to a dry state. It is an expression of
the volume change between the water content of the clod at 1/3- or 1/10 -bar
tension (33kPa or 10kPa tension) and oven dryness. The volume change is
reported in the table as percent change for the whole soil. The amount and type
of clay minerals in the soil influence volume change.
Linear extensibility is used to determine the shrink -swell potential of soils. The
shrink -swell potential is low if the soil has a linear extensibility of less than 3
percent; moderate if 3 to 6 percent; high if 6 to 9 percent; and very high if more
than 9 percent. If the linear extensibility is more than 3, shrinking and swelling
can cause damage to buildings, roads, and other structures and to plant roots.
Special design commonly is needed.
Organic matter is the plant and animal residue in the soil at various stages of
decomposition. In this table, the estimated content of organic matter is expressed
as a percentage, by weight, of the soil material that is less than 2 millimeters in
diameter. The content of organic matter in a soil can be maintained by returning
crop residue to the soil.
Organic matter has a positive effect on available water capacity, water infiltration,
soil organism activity, and tilth. It is a source of nitrogen and other nutrients for
crops and soil organisms.
Erosion factors are shown in the table as the K factor (Kw and Kf) and the T
factor. Erosion factor K indicates the susceptibility of a soil to sheet and rill
erosion by water. Factor K is one of six factors used in the Universal Soil Loss
Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE) to
predict the average annual rate of soil loss by sheet and rill erosion in tons per
acre per year. The estimates are based primarily on percentage of silt, sand, and
organic matter and on soil structure and Ksat. Values of K range from 0.02 to
0.69. Other factors being equal, the higher the value, the more susceptible the
soil is to sheet and rill erosion by water.
Erosion factor Kw indicates the erodibility of the whole soil. The estimates are
modified by the presence of rock fragments.
Erosion factor Kf indicates the erodibility of the fine -earth fraction, or the material
less than 2 millimeters in size.
Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 2 of 5
Physical Soil Properties ---Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Erosion factor T is an estimate of the maximum average annual rate of soil
erosion by wind and/or water that can occur without affecting crop productivity
over a sustained period. The rate is in tons per acre per year.
Wind erodibitity groups are made up of soils that have similar properties affecting
their susceptibility to wind erosion in cultivated areas. The soils assigned to
group 1 are the most susceptible to wind erosion, and those assigned to group 8
are the least susceptible. The groups are described in the "National Soil Survey
Handbook."
Wind erodibiiity index is a numerical value indicating the susceptibility of soil to
wind erosion, or the tons per acre per year that can be expected to be lost to
wind erosion. There is a close correlation between wind erosion and the texture
of the surface layer, the size and durability of surface clods, rock fragments,
organic matter, and a calcareous reaction. Soil moisture and frozen soil layers
also influence wind erosion.
Reference:
United States Department of Agriculture, Natural Resources Conservation
Service. National soil survey handbook, title 4304I. (http://soils.usda.gov)
USDA Natural Resources Web Soil Survey 2/22/2017
ar Conservation Service National Cooperative Soil Survey Page 3 of 5
Physical Soil Properties -Albemarle County, Virginia
Report -Physical Soil Properties
Three values are provided to identify the expected Low (L), Representative Value (R), and High (H).
Boyd Tavem Market - Initial Site Plan
Physical Soil Properties -Albemarle County, Virginia
Map symbol
Depth
Sand
Sift
Clay
Moist
Saturated
Available
Linear
Organic
Erosion
Wind
Wind
and soil name
bulk
hydraulic
water
extensibility
matter
factors
erodibility
erodlbility
density
conductivity
capacity
group
index
Kw
Kf
F
In
Pct
Pct
Pct
9/cc
micro m/sec
InRn
Pct
Pct
62B-Nason
silt loam, 2 to
7 percent
slopes
Nason
0-8
-27-
-54-
10-19-27
1.25-1.40
4.00-9.00-14.00
0.14-0.17-0.
0.0-1.5-2.9
1.0-2.0-
.37
.37
4
5
56
-1.55
20
3.0
8-39
-17-
-51-
27-32-50
1.30-1.45
4.00-9.00-14.00
0.12-0.16-0.
3.D-4.5-5.9
0.0-0.3-
.37
.37
-1.60
19
0.5
39-50
-29-
-53-
10-18-25
1.25-1.40
4.00-9.00-14.00
0.15-0.18-0.
00-1.5-29
0.0-0.3-
.24
.49
-1.55
20
0.5
50-79
-
-
-
-
0.00-7.00-14.00
-
-
-
62C-Nason
silt loam, 7 to
15 percent
slopes
Nason
0-8
-27-
-54-
10-19-27
1.25-1.40
4.00-9.00-14.00
0.14-0.17-0.
0.0- 1.5- 2.9
1.0-2.0-
.37
.37
4
5
56
-1.55
20
3.0
8-39
-18-
-50-
27-32-50
1.30-1.45
4.00-9.00-14.00
0.12-0.16-0.
3.0- 4.5- 5.9
0.0-0.3-
.37
.37
-1.60
19
0.5
39-50
-29-
-53-
10-18-25
1.25-1.40
4.00-9.00-14.00
0.15-0.18-0.
0.0-1.5- 2.9
0.0-0.3-
.24
.49
-1.55
20
0.5
50-79
-
-
-
-
0.00-7.00-14.00
-
-
-
I Y), Natural Resources Web Soil Survey 2/2212017
Conservation Service National Cooperative Soil Survey Page 4 of 5
Physical Soil Properties ---Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Physical Soil Properties -Albemarle Counly; Virginia
Map symbol
Depth
Sand
Sift
Clay
Moist
Saturated
Available
Linear
Organic
Erosion
Wind
VAnd
and SWname
bulk
hydraulic
water
extensibility
matter
factors
erodibility
erodtbility
density
conductivity
capacity
group
Index
Kw
Kf
T
In
Pct
Pct
Pct
g/cc
micro msec
InAn
Pct
Pct
SOB -Tatum silt
loam, 2 to 7
percent
slopes
Tatum
0-6
-27-
-54-
12-20-27
1.10-1.25
4.00-9.00-14.00
0.16-0.18-0.
0.0- 1.5- 2.9
0.5-1.3-
.37
.37
4
5
56
-1.40
20
2.0
6-42
-8-
49-
27-43-60
1.40-1.50
4.00-9.00-14.00
0.10-0.15-0.
3.0-4.5-5.9
0.0- 0.3
.28
.28
-1.60
19
0.5
42-51
-20-
-54-
12-26-40
1.40-1.50
4.00-9.00-14.00
0.10-0.15-0.
3.0-4.5-5.9
0.0-0.3-
.20
.43
-1.60
19
0.5
51-79
-
-
-
-
0.00-21.00-42.0
-
-
-
0
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
t15pA Natural Resources Web Soil Survey 2/22/2017
Conservation Service National Cooperative Soil Survey Page 5 of 5
Hydrologic Soil Group and Surface Runoff ---Albemarle County, Virginia
Hydrologic Soil Group and Surface Runoff
Boyd Tavern Market - Initial Site Plan
This table gives estimates of various soil water features. The estimates are used
in land use planning that involves engineering considerations.
Hydrologic soft groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long -duration storms.
The four hydrologic soil groups are:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas.
Surface runoff refers to the loss of water from an area by flow over the land
surface. Surface runoff classes are based on slope, climate, and vegetative
cover. The concept indicates relative runoff for very specific conditions. It is
assumed that the surface of the soil is bare and that the retention of surface
water resulting from irregularities in the ground surface is minimal. The classes
are negligible, very low, low, medium, high, and very high.
Report—Hydrologic Soil Group and Surface Runoff
Absence of an entry indicates that the data were not estimated. The dash
indicates no documented presence.
Hydrologic Soil Group and Surface Runoff–Albemarle County, Virginia
Map symbol and soil name Pct of map unit Surface Runoff Hydrologic Soil Group
62B—Nason silt loam, 2 to 7 percent slopes
Nason 80 Medium B
Natural Resources Web Soil Survey 2/22/2017
�� Conservation Service National Cooperative Soil Survey Page 1 of 2
Hydrologic Soil Group and Surface Runoff ---Albemarle County, Virginia
Boyd Tavern Market - Initial Site Plan
Hydrologic Soil Group and Surface Runoff–Albemarle County, Virginia
Map symbol and soil name
Pct. of map unit
Surface Runoff
Hydrologic Soil Group
62C—Nason silt loam, 7 to 15 percent slopes
Nason
80
Medium
B
80B—Tatum silt loam, 2 to 7 percent slopes
Tatum
80
Medium
B
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
Uu DA Natural Resources Web Soil Survey 2/22/2017
.il Conservation Service National Cooperative Soil Survey Page 2 of 2