HomeMy WebLinkAboutSDP201600035 Approval - County 2016-07-21COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, North Wing
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
August 4, 2016
Scott Collins
200 Garrett Street, Suite K.
Charlottesville VA 22902
RE: SDP201600035 Belvedere Phase 4A — Initial Site Plan
Mr. Collins,
The Agent for the Board of Supervisors hereby grants administrative approval to the above referenced site plan.
This approval shall be valid for a period of five (5) years from the date of this letter, provided that the developer
submits a final site plan for all or a portion of the site within one (1) year after the date of this letter as provided in
section 32.4.3.1 of Chapter 18 of the Code of the County of Albemarle, and thereafter diligently pursues approval of
the final site plan.
The final site plan will not be considered to have been officially submitted until the following items are received:
1. A final site plan that satisfies all of the requirements of section 32.6 of Chapter 18 of the Code.
2. A fee of $1,613.
Please submit 10 copies of the final plans to the Community Development Department. The assigned Lead
Reviewer will then distribute the plans to all reviewing agencies. Once you receive the first set of comments on the
final site plan, please work with each reviewer individually to satisfy their requirements.
The Department of Community Development shall not accept submittal of the final site plan for signature until
tentative approvals for the attached conditions from the following agencies/reviewers have been obtained:
SRC Members:
Albemarle County Planning Services (Planner) - 3 copies [Christopher Perez ext 34431
Albemarle County Zoning Services - 1 copies [Rebecca Ragsdale (434)-296-5832 Ext. 3226]
Albemarle County Engineering Services (Engineer) - 1 copy [Max Greene ext 3283]
Albemarle County Information Services (E911) - 1 copy [Andrew Slack ext 3384]
Albemarle County Department of Fire Rescue - 1 copy [Robbie Gilmer 434-296-5833]
Virginia Department of Transportation - 1 copy [Willis Bedsaul 434-422-9866]
Albemarle County Building Inspections - 1 copy [Jay Schlothauer (434)-296-5832 Ext. 3228]
Albemarle County Service Authority (ACSA) - 1 copy [Alex Morrison 434-977-4511 ext. 116]
If you have any questions about these conditions or the submittal requirements please feel free to contact me at
Extension 3443, cperez@albemarle.org.
Sincerely, _
Christopher P. Perez
Senior Planner
104- ° � Soils Report
\_.. t\ for
Belvedere Phases IIB and IV-A
Tax Map IDs: 06100-00-00-16000
061A3-00-00-00100
06200-00-00-002A1
06200-00-00-002B0
Item Numbers: SDP201600035
SUB201600120
SUB201600119
Prepared: July 5, 2016
itLOUISA
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
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USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 1 of 3
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Soil Map-Albemarle County,Virginia Belvedere Phase IIB&IV A
Map Unit Legend
Albemarle County,Virginia(VA003)
Map Unit Symbol I Map Unit Name Acres in AOI Percent of AOI
2C Albemarle fine sandy loam,7 to 0.1 0.1%
15 percent slopes
16 'Chewacla silt loam 7.8 5.5%
slopes
- -
19B Cullen loam,2 to 7 percent 22.4 16.0%
19C Cullen loam,7 to 15 percent 22.2 r - 15.8%
slopes
I20C3 �
. /o
70
Cullen clay loam,7 to 15 9.8 o
percent slopes,severely
eroded
- - T
20D3 Cullen clay loam, 15 to 25 8.9 6.4%
percent slopes,severely
eroded
22C3 j Culpeper clay loam,7 to 15 2.4 1.7%
percent slopes,severely
eroded I
27B Elioak loam,2 to 7 percent 6,2 4.4%
slopes
41
-.. - -----
- -
27C I Elioak loam,7 to 15 percent 6.9 4.9%
slopes - 0.0%
34B Glenelg loam,2 to 7 percent 0.0
slopes
percent1.7I
!34C Glenelgloam,7 to 151.2%
slopes
39D Hazel loam, 15 to 25 percent I 26.9 19.2% !'
i slopes
39E j Hazel loam,25 to 45 percent 0.5 0.4%
slopes
percent lops
140E Hazel verystonyloam,25 to 45! 9.8 7.0%
- - - L- 5.8%
Y 8.2 8 _H
83 Toccoa fine sand loam
i
195 �Wehadkee silt loam 4.0 2.8%
I W i Water 2.5 ' 1.8%
Totals for Area of Interest 140.5 100.0%
USDA Natural Resources Web Soil Survey 7/5/2016
aConservation Service National Cooperative Soil Survey Page 3 of 3
Nome
ver/
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
Map Unit Description (Brief, Generated)
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: 2C—Albemarle fine sandy loam, 7 to 15 percent slopes
Component: Albemarle (80%)
The Albemarle component makes up 80 percent of the map unit. Slopes are 7 to
15 percent. This component is on hillslopes, piedmonts. The parent material
consists of residuum weathered from metasedimentary rock. Depth to a root
restrictive layer, bedrock, paralithic, is 35 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 low.
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: 16—Chewacla silt loam
USDA Natural Resources Web Soil Survey 7/5/2016
MIT. Conservation Service National Cooperative Soil Survey Page 1 of 7
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
Component: Chewacla (85%)
The Chewacla component makes up 85 percent of the map unit. Slopes are 0 to 2
percent. This component is on flood plains, river valleys. The parent material
consists of residuum weathered from granite and gneiss. Depth to a root restrictive
layer is greater than 60 inches. The natural drainage class is somewhat poorly
drained. Water movement in the most restrictive layer is moderately high.Available
water to a depth of 60 inches is high. Shrink-swell potential is low. This soil is
occasionally flooded. It is not ponded. A seasonal zone of water saturation is at 12
inches during January, February, March, April, November, December. Organic
matter content in the surface horizon is about 2 percent. Nonirrigated land capability
classification is 3w. This soil does not meet hydric criteria.
Component: Wehadkee (3%)
Generated brief soil descriptions are created for major components.The Wehadkee
soil is a minor component.
Map Unit: 19B—Cullen loam, 2 to 7 percent slopes
Component: Cullen (80%)
The Cullen component makes up 80 percent of the map unit. Slopes are 2 to 7
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from acid and basic igneous rock. Depth to a root restrictive
layer is greater than 60 inches . The natural drainage class is well drained. Water
movement in the most restrictive layer is very low. 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.
Map Unit: 19C—Cullen loam, 7 to 15 percent slopes
Component: Cullen (80%)
The Cullen component makes up 80 percent of the map unit. Slopes are 7 to 15
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from acid and basic igneous rock. Depth to a root restrictive
layer is greater than 60 inches . The natural drainage class is well drained. Water
movement in the most restrictive layer is very low. 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: 20C3—Cullen clay loam, 7 to 15 percent slopes, severely eroded
Component: Cullen (80%)
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 2 of 7
'slow 'woo
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
The Cullen component makes up 80 percent of the map unit. Slopes are 7 to 15
percent. This component is on piedmonts, hillslopes. The parent material consists
of residuum weathered from acid and basic igneous rock. Depth to a root restrictive
layer is greater than 60 inches . The natural drainage class is well drained. Water
movement in the most restrictive layer is very low. 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 4e. This soil does not meet hydric criteria.
Map Unit: 20D3—Cullen clay loam, 15 to 25 percent slopes, severely eroded
Component: Cullen (80%)
The Cullen component makes up 80 percent of the map unit. Slopes are 15 to 25
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from acid and basic igneous rock. Depth to a root restrictive
layer is greater than 60 inches . The natural drainage class is well drained. Water
movement in the most restrictive layer is very low. 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 6e. This soil does not meet hydric criteria.
Map Unit: 22C3—Culpeper clay loam, 7 to 15 percent slopes, severely eroded
Component: Culpeper(80%)
The Culpeper component makes up 80 percent of the map unit. Slopes are 7 to 15
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from meta-arkosic sandstone and quartzite. Depth to a root
restrictive layer, bedrock, paralithic, is 40 to 79 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 4e. This soil does
not meet hydric criteria.
Map Unit: 27B—Elioak loam, 2 to 7 percent slopes
Component: Elioak (80%)
USDA Natural Resources Web Soil Survey 7/5/2016
MO Conservation Service National Cooperative Soil Survey Page 3 of 7
low Iry
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
The Elioak component makes up 80 percent of the map unit. Slopes are 2 to 7
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from mica schist. Depth to a root restrictive layer is greater
than 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 low. 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.
Map Unit: 27C—Elioak loam, 7 to 15 percent slopes
Component: Elioak (80%)
The Elioak component makes up 80 percent of the map unit. Slopes are 7 to 15
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from mica schist. Depth to a root restrictive layer is greater
than 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 low. 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: 34B—Glenelg loam, 2 to 7 percent slopes
Component: Glenelg (90%)
The Glenelg component makes up 90 percent of the map unit. Slopes are 2 to 7
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from mica schist. Depth to a root restrictive layer is greater
than 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
high. Shrink-swell potential is low. 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.
Map Unit: 34C—Glenelg loam, 7 to 15 percent slopes
Component: Glenelg (85%)
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 4 of 7
Now. Noire
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
The Glenelg component makes up 85 percent of the map unit. Slopes are 7 to 15
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from mica schist. Depth to a root restrictive layer is greater
than 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
high. Shrink-swell potential is low. 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: 39D—Hazel loam, 15 to 25 percent slopes
Component: Hazel (80%)
The Hazel component makes up 80 percent of the map unit. Slopes are 15 to 25
percent. This component is on piedmonts, hillslopes. The parent material consists
of residuum weathered from graywacke sandstone and mica schist. Depth to a root
restrictive layer, bedrock, lithic, is 20 to 40 inches. The natural drainage class is
excessively drained.Water movement in the most restrictive layer is high.Available
water to a depth of 60 inches is low. Shrink-swell potential is low. 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 4e. This soil does not meet hydric
criteria.
Map Unit: 39E—Hazel loam, 25 to 45 percent slopes
Component: Hazel (80%)
The Hazel component makes up 80 percent of the map unit. Slopes are 25 to 45
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from graywacke sandstone and mica schist. Depth to a root
restrictive layer, bedrock, lithic, is 20 to 40 inches. The natural drainage class is
excessively drained.Water movement in the most restrictive layer is high.Available
water to a depth of 60 inches is low. Shrink-swell potential is low. 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 7e. This soil does not meet hydric
criteria.
Map Unit: 40E—Hazel very stony loam, 25 to 45 percent slopes
Component: Hazel (80%)
USDA Natural Resources Web Soil Survey 7/5/2016
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New Negro
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
The Hazel component makes up 80 percent of the map unit. Slopes are 25 to 45
percent. This component is on hillslopes, piedmonts. The parent material consists
of residuum weathered from graywacke sandstone and mica schist. Depth to a root
restrictive layer, bedrock, lithic, is 20 to 40 inches. The natural drainage class is
excessively drained.Water movement in the most restrictive layer is high.Available
water to a depth of 60 inches is low. Shrink-swell potential is low. 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 7e. This soil does not meet hydric
criteria.
Map Unit: 83—Toccoa fine sandy loam
Component: Toccoa (85%)
The Toccoa component makes up 85 percent of the map unit. Slopes are 0 to 2
percent. This component is on flood plains, river valleys. The parent material
consists of alluvium derived from igneous rock. Depth to a root restrictive layer is
greater than 60 inches.The natural drainage class is well drained.Water movement
in the most restrictive layer is high. Available water to a depth of 60 inches is
moderate. Shrink-swell potential is low. This soil is frequently flooded. It is not
ponded. A seasonal zone of water saturation is at 45 inches during January,
February, March, April, December. Organic matter content in the surface horizon
is about 2 percent. Nonirrigated land capability classification is 2w. This soil does
not meet hydric criteria.
Component: Wehadkee(3%)
Generated brief soil descriptions are created for major components.The Wehadkee
soil is a minor component.
Map Unit: 95—Wehadkee silt loam
Component: Wehadkee(80%)
The Wehadkee component makes up 80 percent of the map unit. Slopes are 0 to
2 percent. This component is on flood plains, river valleys. The parent material
consists of alluvium derived from igneous rock. Depth to a root restrictive layer is
greater than 60 inches. The natural drainage class is poorly drained. Water
movement in the most restrictive layer is moderately high.Available water to a depth
of 60 inches is high. Shrink-swell potential is low. This soil is occasionally flooded.
It is not ponded.A seasonal zone of water saturation is at 15 inches during January,
February, March, April, May, June, November, December. Organic matter content
in the surface horizon is about 4 percent. Nonirrigated land capability classification
is 4w. This soil meets hydric criteria.
Map Unit: W—Water
Component: Water(100%)
USDA Natural Resources Web Soil Survey 7/5/2016
�1. Conservation Service National Cooperative Soil Survey Page 6 of 7
'wow ,goige
Map Unit Description(Brief, Generated)---Albemarle County,Virginia Belvedere Phase IIB&IV A
Generated brief soil descriptions are created for major soil components. The Water
is a miscellaneous area.
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 7 of 7
Now None
Dwellings and Small Commercial Buildings---Albemarle County,Virginia Belvedere Phase IIB&IV A
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.
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.
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 1 of 4
Now- vow'
Dwellings and Small Commercial Buildings---Albemarle County,Virginia Belvedere Phase IIB&IV A
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 basements Dwellings with basements Small commercial buildings
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
2C—Albemarle fine
sandy loam,7 to 15
percent slopes
Albemarle 80 Somewhat limited Somewhat limited Very limited
Slope 0.37 Depth to hard bedrock 0.42 Slope 1.00
Slope 0.37
Depth to soft bedrock 0.01
16—Chewacla silt
loam
1-Chewacla 85 Very limited Very limited Very limited
Flooding 1.00 Flooding 1.00 Flooding 1.00
Depth to saturated 1.00 Depth to saturated 1.00 Depth to saturated 1.00
zone zone zone
19B—Cullen loam,2
to 7 percent slopes } —
Cullen 80 Somewhat limited Somewhat limited Somewhat limited
Shrink-swell 0.50 Shrink-swell 0.50 Shrink-swell 0.50
Slope 0.13
USDA Natural Resources Web Soil Survey 7/5/2016
�" Conservation Service National Cooperative Soil Survey Page 2 of 4
Now ,Ise
Dwellings and Small Commercial Buildings---Albemarle County,Virginia Belvedere Phase IIB&IV A
Dwellings and Small Commercial Buildings-Albemarle County,Virginia
Map symbol and soil Pct.of Dwellings without basements Dwellings with basements Small commercial buildings
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
19C—Cullen loam,7 I
to 15 percent slopes
Cullen 1 80 Somewhat limited Somewhat limited Very limited
Shrink-swell 0.50 Shrink-swell 0.50 Slope 1.00
- _
_ Slope 0.37 Slope 0.37 Shrink-swell 50
0.50
4.
120C3—Cullen clay T
loam,7 to 15
' percent slopes,
— —
severely eroded
+
Cullen 80 Somewhat limited Somewhat limited Very limited
ll :
Shrink-swell 0.50 Shrink-swell 0.50 Slope 1.00
Slope 0.37 Slope 0.37 Shrink-swell 0.50
20D3—Cullen clay
loam, 15 to 25
percent slopes,
severely eroded
�
Cullen _--
80 Very limited Very limited Very limited
— I—
Slope . oe 100 Sl - ---
po 1.00 Slope 1.00
Shrink-swell 7, 0.50 Shrink-swell 0.50 Shrink-swell 0.50
22C3—Culpeper clay
loam,7 to 15
I
percent slopes,
severely eroded
H-
Culpeper 80 Somewhat limited 1 Somewhat limited Very limited
Slope 1 0.37 Depth to hard bedrock 0.42 Slope 1.00
-'h
Shrink-swell 1 0.35 Slope 0.37 Shrink-swell 0.35
It I-
1 I
1-_ _
Shrink-swell 0.15
27B—Elioak loam,2 to
7 percent slopes
Not limited
Elioak � -_
80 Not limited Somewhat limited
. _ L
Slope 0.13
127C—Elioak loam,7 to _-
15 percent slopes ,
Elioak 1 80 Somewhat limited Somewhat limited Very limited
' Slope 0.37 Slope 1 0.37 Slope 1.00
34B—Glenelg loam,2
to 7 percent slopes
Glenelg 90 Not limited Not limited H
Somewhat limited
Slope 0.13
USDA Natural Resources Web Soil Survey 7/5/2016
410 Conservation Service National Cooperative Soil Survey Page 3 of 4
Nosew.r .
Dwellings and Small Commercial Buildings---Albemarle County,Virginia Belvedere Phase IIB&IV A
Dwellings and Small Commercial Buildings-Albemarle County,Virginia
Map symbol and soil Pct.of Dwellings without basements Dwellings with basements Small commercial buildings
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
34C-Glenelg loam, 7 I
to 15 percent slopes!
Glenel - ---
g 85 Somewhat limited Somewhat limited Very limited
Slope p 0.37 Slope 0.37 Slope 1.00
39D-Hazel loam, 15 1
I to 25 percent slopes
80 Verylimited
Hazel �
-__ Very limited Very limited
- -. op
e 1.00 Slope. - I 1.00 Slope
e 1.00L
I Depth to hard bedrock 0.46 Depth to hard bedrockDepth to hard bedrock0.46
39E-Hazel loam,25
to 45 percent slopes
- Very Very
P +_ 1.00 Slope - - � --1.00 -- _- - -
I Hazel 80 Very limited limited Ve
- - . limited
Slope _—_ P Slope - -
- -
1.00
De th to hard bedrock 0.46 Depth to hard bedrock 1.00 Depth to hard bedrock
0.46
40E-Hazel very
stony loam,25 to 45
percent slopes 1
Very
-_-
HazelVery
80 Slope
limited 1.00 Slope
Very limited
-_- __ _ p 1.00 Slope 1.00
- -- +Depth to hard bedrock 0.46 Depth to hard bedrock
1.00 Depth to hard bedrock 0.46+
'83-Toccoa fine
sandy loam
}
Toccoa 85 Very limited Verylimited
Very limited
Flooding 1.00 Flooding 1.00 Flooding 1.00
Depth to saturated 0.73
zone
- - - -
- -
5-Wehadkee silt
loam
t - Verylimited
80 Very limited
-----------
ee Very limited
Flooding 1.00 Flooding 1.00 Flooding 1.00
I Depth to saturated 1.00 Depth to saturated 1.00 -
Depth to saturated 1.00
zone zone
zone
rt
W-Water
Water 1 100 Not rated Not rated Not rated
-1
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey
'�� Conservation Service 7/5/2016
National Cooperative Soil Survey Page 4 of 4
Roads and Streets,Shallow Excavations,and Lawns and Landscaping---Albemarle County, Belvedere Phase IIB&IV A
Virginia
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 Web Soil Survey 7/5/2016
�� Conservation Service National Cooperative Soil Survey Page 1 of 6
Ire
Roads and Streets,Shallow Excavations,and Lawns and Landscaping--Albemarle County, Belvedere Phase IIB&IV A
Virginia
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 Local roads and streets Shallow excavations Lawns and landscaping
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
2C—Albemarle fine
sandy loam,7 to 15
percent slopes
Albemarle 80 Very limited Somewhat limited Somewhat limited
Low strength 1.00 Depth to hard bedrock 0.42 Low exchange 0.75
capacity
Frost action 0.50 Slope 0.37 Slope 0.37
Slope 0.37 Dusty 0.04 Dusty 0.04
Depth to soft bedrock 0.01 Depth to bedrock 0.01 Unstable excavation 0.01
walls
USDA Natural Resources Web Soil Survey 7/5/2016
�0 Conservation Service National Cooperative Soil Survey Page 2 of 6
Roads and Streets, Shallow Excavations,and Lawns and Landscaping---Albemarle County, Belvedere Phase IIB&IV A
Virginia
Roads and Streets,Shallow Excavations,and Lawns and Landscaping-Albemarle County,Virginia
Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
16-Chewacla silt
loam
Chewacla 85 Very limited Very limited Somewhat limited
Flooding 1.00 Depth to saturated 1.00 Depth to saturated 0.99
zone zone
Low strength 1.00 Flooding 0.60 Flooding 0.60
r Depth to saturated 0.99 Dusty 0.08 Low exchange 0.50
zone capacity
- --
Unstable excavation 0.01 Dusty 0.08 walls
+
19B-Cullen loam,2
to 7 percent slopes 1I
Cullen 80 Very limited Somewhat limited Somewhat limited I
Low strength 1.00 Too clayey 0.72 Low exchange I 0.75
capacity
Shrink-swell 0.50 Dusty 0.06 Too clayey 0.50
Unstable excavation 0.01 Dusty 0.06
walls
19C-Cullen loam,7
to 15 percent slopes
-ll - -- -
Cullen 80 Very limited Somewhat limited i
Somewhat limited
Low strength 1.00 Too clayey 0.72 Too clayey 0.50
Shrink-swell 0.50 Slope 0.37 Low exchange 0.50
1 capacity
Slope 0.37 Dusty 0.06 Slope 0.37
- - -
Unstable excavation 0.01 Dusty 0.06
walls
20C3-Cullen clay
loam,7 to 15
percent slopes,
severely eroded
Cullen80 Very limited Somewhat limited Somewhat limited
1 1,11
Low strength 1.00 Too clayey 0.72 Low exchange 0.75
capacity
--
Shrink-swell 0.50 Slope 0.37 Too clayey 0.50
Slope
0.37 Dusty 0.07 Slope 0.37
Unstable excavation 0.01 Dusty I 0.07
- L walls L
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 3 of 6
"%rrr rim." .
Roads and Streets,Shallow Excavations,and Lawns and Landscaping---Albemarle County, Belvedere Phase IIB&IV A
Virginia
Roads and Streets,Shallow Excavations,and Lawns and Landscaping-Albemarle County,Virginia
Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
20D3-Cullen clay
loam, 15 to 25
percent slopes,
severely eroded '
Cullen 80 Very limited Very limited Very limited
Slope 1.00 Slope f 1.00 Slope 1 1.00
Low strength 1.00 Too clayey 0.72 Low exchange 1 0.50
capacity
- - -
Shrink-swell 0.50 Dusty 0.07 Too clayey 0.50
Unstable excavation 0.01 Dusty 0.07
- - walls +-
22C3-Culpeper clay
loam, 7 to 15
I percent slopes,
severely eroded
Culpeper 80 Very limited Somewhat limited Very limited
g
Low strep th 1.00 Depth to hard bedrock
0.42 Low exchange 1.00
capacity
Frost action 0.50 Slope 0.37 Too clayey 0.50
Slope 0.37 Too clayeySlope
0.13 0.37
Shrink-swell 0.35 Dusty
0.07 Dusty 0.07
Unstable excavation 0.01
walls
27B-Elioak loam,2 to -
7 percent slopes II
Elioak I 80 Very limited Somewhat limited Very limited
Low strength 1.00 Too clayey 0.13 Low exchange 1.00
capacity
-
Frost action : 0.50 Dusty 0.08 Too clayey 0.50
Unstable excavation 0.01 Dusty 0.08
walls
27C-Elioak loam,7 to
15 percent slopes
Elioak 80 Very limited Somewhat limited Very limited
Low strength 1.00 Slope 0.37 Low exchange 1.00
capacity
Frost action 0.50 Too clayey 0.13 Too clayey 0.50
Slope 0.37 Dusty 0.08 Slope 0.37
Unstable excavation 0.01 Dusty 0.08
walls I
USDA Natural Resources Web Soil Survey 7/5/2016
iira
Conservation Service National Cooperative Soil Survey Page 4 of 6
Roads and Streets, Shallow Excavations,and Lawns and Landscaping---Albemarle County, Belvedere Phase IIB&IV A
Virginia
Roads and Streets,Shallow Excavations,and Lawns and Landscaping-Albemarle County,Virginia
Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
34B-Glenelg loam,2
to 7 percent slopes
Glenelg 90 Very limited Somewhat limited Somewhat limited
Low strength I 1.00 Dusty 0.07 Low exchange 0.75
capacity
Frost action 0.50 Unstable excavation 0.01 Dusty 0.07
walls
34C-Glenelg loam,7 - - -_- -- - -----
to 15 percent slopes
Glenelg 85 Very limited Somewhat limited Somewhat limited
Low strength 1.00 Slope 0.37 Low exchange 0.75
capacity
Frost action 0.50 Dusty 0.07 Slope 0.37
Slope 0.37 Unstable excavation 0.01 Dusty 0.07
walls
39D-Hazel loam, 15
to 25 percent slopes
Hazel 80 Very limited Very limited Very limited
-
Slope I 1.00 Depth to hard bedrock j 1.00 Slope 1.00
Frost action 0.50 Slope 1.00 Low exchange 0.75
capacity
Depth to hard bedrock
0.46 Dusty 0.04 Depth to bedrock 0.46
i- - - - _ - � - -- - - it ---- - -- --
'
Unstable excavation 0.01 Dusty 0.04
walls
39E-Hazel loam,25
to 45 percent slopes
Hazel
80 Very limited Very limited Very limited
Slope 1.00 Depth to hard bedrock 1.00 Slope 1.00
Frost action 0.50 Slope 1.00 Low exchange 1.00
capacity
Depth to hard bedrock 0.46 Dusty 0.04 Depth to bedrock 0.46
Unstable excavation 0.01 Dusty 0.04
walls
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 5 of 6
Roads and Streets, Shallow Excavations,and Lawns and Landscaping---Albemarle County, Belvedere Phase IIB&IV A
Virginia
Roads and Streets,Shallow Excavations,and Lawns and Landscaping-Albemarle County,Virginia
Map symbol and soil Pct.of Local roads and streets Shallow excavations Lawns and landscaping
name map
unit Rating class and Value Rating class and Value Rating class and Value
limiting features limiting features limiting features
140E—Hazel very 1 1
stony loam,25 to 45
percent slopes
Very Y -
Hazel li Very limited
80 Verylimited limited II
Slope 1.00 Depth to hard bedrock 1 1.00 Slope 1.00
Frost action I
0.50 Slope 1.00 Low exchange 1.00
- -- -
1 capacity I
Depth to hard bedrock 0.46 Dusty 0.04 Depth to bedrock 0.46
-.- 1_ _
Unstable excavation 0.01 Dusty 0.04
walls
83—Toccoa fine
sandy loam
Toccoa 85 Very limited Somewhat limited Very limited
fi
Flooding 1.00 Flooding 0.80 Flooding 1.00
Depth to saturated
0.73 Low exchange 1.00
zone capacity
Unstable excavation 1 0.01 Dusty 0.01
walls
r_
Dusty 0.01
95—Wehadkee silt
loam
Wehadkee 80 Very limited Very limited Somewhat limited
Flooding 1.00 Depth to saturated 1.00 Depth to saturated 0.94
zone zone
Low strength 1.00 Flooding 0.60 Flooding 0.60
Depth to saturated 1 0.94 Dusty 0.08 Low exchange 0.50
zone ' capacity
Unstable excavation 0.01 Dusty 0.08
walls
W—Water 1
Water
100 Not rated Not rated Not rated
Data Source Information
Soil Survey Area: Albemarle County, Virginia
Survey Area Data: Version 10, Dec 11, 2013
USDA Natural Resources Web Soil Survey 7/5/2016
'� Conservation Service National Cooperative Soil Survey Page 6 of 6
1141011
Physical Soil Properties---Albemarle County,Virginia Belvedere Phase IIB&IV A
Physical Soil Properties
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.
USDA Natural Resources Web Soil Survey 7/5/2016
r Conservation Service National Cooperative Soil Survey Page 1 of 11
Now vow
Physical Soil Properties---Albemarle County,Virginia Belvedere Phase IIB&IV A
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.
USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 2 of 11
rune Nosge
Physical Soil Properties---Albemarle County,Virginia Belvedere Phase IIB&IV A
Erosion factor Tis 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 erodibility 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 erodibility 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 430-VI. (http://soils.usda.gov)
USDA Natural Resources Web Soil Survey 7/5/2016
101111 Conservation Service National Cooperative Soil Survey Page 3 of 11
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Soil Features---Albemarle County,Virginia Belvedere Phase IIB&IV A
Soil Features
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.
-010 USDA Natural Resources Web Soil Survey 7/5/2016
Conservation Service National Cooperative Soil Survey Page 1 of 5
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