HomeMy WebLinkAbout970982.tiff NONTECHNICAL SOILS DESCRIPTION REPORT
Soils Identified on the Podtburg Land
Map Soil name and description
Symbol
32 Kim loam, 1 to 3 percent slopes
This is a deep well drained soiL on smooth plains and
alluvial fans. It formed in mixed wind deposits and
parent sediment. Typically the surface layer is brown
and pale brown loam about 12 in. thick. Permeability is
moderate. Available water holding capacity is high. The
effective rooting depth is 60 in. The hazard of water
erosion is Low, while that due to wind is high.
33 Kim loam, 3 to 5 percent slopes
This is a deep well drained soil on smooth plains and
alluvial fans. It formed in mixed wind deposits and
parent sediment. Typically the surface Layer is brown
and pale brown Loam about 12 in. thick. Permeability is
moderate. Available water holding capacity is high. The
effective rooting depth is 60 in. The hazard of water
erosion is low, white that due to wind is high.
47 Olney fine sandy loam, 1 to 3 percent slopes
The Olney soil is a deep, well drained soil. It is
formed on smooth plains in mixed outwash deposits. The
surface is a fine sandy loam. The subsoil is sandy clay
loam. The underlying material is a calcareous fine
sandy Loam. The soils have moderate permeability.
Their available water holding capacity is moderate.
Roots penetrate to 60 inches or more. Runoff is slow
and the erosion hazard due to wind is severe.
48 Olney fine sandy loam, 3 to 5 percent slopes
The Olney soil is a deep, well drained soil. It is
formed on smooth plains in mixed outwash deposits. The
surface is a fine sandy Loam. The subsoil is sandy clay
loam. The underlying material is a caLcareous fine
sandy loam. The soiLs have moderate permeability.
Their available water holding capacity is moderate.
Roots penetrate to 60 inches or more. Runoff is slow
and the erosion hazard due to wind is severe.
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U.S. DEPARTMENT OF AGRICULTURE PAGE 1 OF 2
NATURAL RESOURCES CONSERVATION SERVICE 02/13/97
BUILDING SITE DEVELOPMENT
Soils Identified on the Podtburg Land
(The information in this report indicates the dominant soil condition but does not eliminate the need for onsite
investigation)
Map symbol Shallow Dwellings Dwellings Small Local roads Lawns and
and soil name excavations without with commercial and streets landscaping
basements basements buildings
32:
Kim Slight Slight Slight Slight Slight Slight
33:
Kim Slight Slight Slight Moderate: Slight Slight
slope
47:
Olney Severe: Slight Slight Slight Slight Slight
cutbanks cave
48:
Olney Severe: Slight Slight Moderate: Slight Slight
cutbanks cave slope
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U.S. DEPARTMENT OF AGRICULTURE PAGE 2 OF 2
NATURAL RESOURCES CONSERVATION SERVICE 02/13/97
BUILDING SITE DEVELOPMENT
Endnote -- BUILDING SITE DEVELOPMENT
This report shows the degree and kind of soil Limitations that affect shallow excavations, dwellings with and without
basements, small commercial buildings, local roads and streets, and lawns and landscaping. The limitations are
"Slight", "Moderate", or "Severe". The limitations are considered "Slight" if soil properties and site features are
generally favorable for the indicated use and limitaions are minor and easily overcome; "Moderate" if soil properties
or site features are not favorable for the indicated use and special planning, design, or maintenance is needed to
overcome or minimize the limitations; and "Severe" if soil properties or site features are so unfavorable or so
difficult to overcome that special design, significant increases in construction costs, and possibly increased
maintenance are required. Special feasibility studies may be required where the soil limitations are severe.
SHALLOW EXCAVATIONS are trenches or holes dug to a maximum depth of 5 or 6 feet for basements, graves, utility lines,
open ditches, and other purposes. The ratings are based on soiL properties, site features, and observed performance of
the soils. The ease of digging, filling, and compacting is affected by the depth to bedrock, a cemented pan, or a very
firm dense layer; stone content; soil texture; and slope. The time of the year that excavations can be made is
affected by the depth to a seasonal high water table and the susceptibility of the soil to flooding. The resistance of
the excavation walls or bands to sloughing or caving is affected by soil texture and the depth to the water table.
DWELLINGS AND SMALL COMMERCIAL BUILDINGS are structures built on shallow foundations on undisturbed soil. The load
limit is the same as that for single-family dwellings no higher than three stories. Ratings are made for small
commercial buildings without basements, for dwellings with basements, and for dwellings without basements. The ratings
are based on soil properties, site features, and observed performance of the soils. A high water table, depth to bedrock
or to a cemented pan, large stones, slope, and flooding affect the ease of excavation and construction. Landscaping
and grading that require cuts and fills of more than 5 or 6 feet are not considered.
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 stabilized soil material, and a
flexible or rigid surface. Cuts and fills are generally properties, site features, and observed performance of the
soils. Depth to bedrock or to a cemented pan, a high water table, flooding, Large stones, and slope affect the ease of
excavating and grading. Soil strength (as inferred from the engineering classification of the soil), shrink-swell
potential, frost action potential, and depth to a high water tabLe affect the traffic-supporting capacity.
LAWNS AND LANDSCAPING require soils on which turf and ornamental trees and shrubs can be established and
maintained. The ratings are based on soil properties, site features, and observed performance of the soils. Soil
reaction, a high water table, depth to bedrock or to a cemented pan, the available water capacity in the upper 40
inches, and the content of salts, sodium, and sulfidic materials affect plant growth. Flooding, wetness, slope,
stoniness, and the amount of sand, clay, or organic matter in the surface layer affect trafficability after vegetation
is established.
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U.S. DEPARTMENT OF AGRICULTURE PAGE 1 OF 2
NATURAL RESOURCES CONSERVATION SERVICE 02/13/97
SOIL FEATURES
Soils Identified on the Podtburg Land
Bedrock Cemented pan Subsidence Risk of corrosion
Potential
Map symbol frost action Uncoated
and soil name Depth Hardness Depth Kind Initial Total steel Concrete
In In In In
32:
Kim >60 --- --- --- --- --- Low High Low
33:
Kim >60 --- --- --- --- --- Low High Low
47:
Olney >60 --- --- --- --- --- Low High Low
48:
Olney >60 --- --- --- --- --- Low High Low
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U.S. DEPARTMENT OF AGRICULTURE PAGE 2 OF 2
NATURAL RESOURCES CONSERVATION SERVICE 02/13/97
SOIL FEATURES
Endnote -- SOIL FEATURES
This report gives estimates of various soil features. The estimates are used in land use planning that involves
engineering considerations.
Depth to bedrock is given if bedrock is within a depth of 5 feet. The depth is based on many soil borings and on
observations during soil mapping. The rock is either "Soft" or "Hard". If the rock is "Soft" or fractured, excavations
can be made with trenching machines, backhoes, or small rippers. If the rock is "Hard" or massive, blasting or
special equipment generally is needed for excavation.
Cemented pans are cemented or indurated subsurface Layers within a depth of 5 feet. Such pans cause difficulty in
excavation. Pans are classified as "Thin" or "Thick". A "Thin" pan is less than 3 inches thick if continuously
indurated or less than 18 inches thick if discontinuous or fractured. Excavations can be made by trenching machines,
backhoes, or small rippers. A "Thick" pan is more than 3 inches thick if continuously indurated or more than 18
inches thick if discontinuous or fractured. Such a pan is so thick or massive that blasting or special equipment is
needed in excavation.
Subsidence is the settlement of organic soils or of saturated mineral soils of very low density. Subsidence
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. This report shows the expected initial
subsidence, which usually is a result of drainage, and total subsidence, which usually is a result of oxidation. Not
shown in the report is subsidence caused by an imposed surface load or by the withdrawal of ground water throughout
an extensive area as a result of lowering the water table.
Potential 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, permeability,
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 mainly to pavements and other rigid structures.
Risk of corrosion pertains to potential soil-induced electrochemical or chemical action that dissolves 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 creates a severe corrosion environment. The steel
installations that intersect soil boundaries or soil layers is more susceptible to corrosion than steel 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 is also expressed as "Low", "Moderate", or "High". It is based on soil texture,
acidity, and amount of sulfates in the saturation extract.
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