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<br />U.S. CEPARTME`IT OF AGRICULTURE PAGE 2 OF 2
<br />NATURAL RESOURCES CONSERVATION SER`JICE 08/9/00
<br />BUILDING SITE DEVELOPMENT
<br />Endnote -- BUILDING SITE pEVELOPME,~1T
<br />This report shows the degree and kind of soil limitations that affect shallow excavations, dwellings with and without
<br />basements, small commercial buildings, local roads and atzeets, and lawns and landscaping. The limitations are
<br />"Slight", "Moderate", or "Severs". The limit~ltions are considered "Slight" if soil properCies and site features are
<br />generally favorable for the indicated use and limitaions are minor and easily overcame; "Moderate" iE soil properties
<br />or site features are not favorable Fox the indicated use and special planning, design, or maintenance is needed to
<br />overcame or miniy~ize the limitations; and "Severe" if soil properties or site features are se unfavorable oz so
<br />difficult to overcome that special design, significant increases in construction costa, and possibly increased
<br />maintenance are required. Special feasibility studies may be required where the soil limitations are severe.
<br />SHALLDW EXCAVATIONS are trenches or holes dug to a maximum depth o£ 5 or 6 feet Por basements, graves, utility lines,
<br />open ditches, and other purposes. The ratings are based on Boil properties, site features, and observed performance of
<br />the soils. The ease of digging, filling, and compacting is, affected by the depth to bedrock, a cemented pan, or a very
<br />firm dense layer; stone content; soil texture; and slope. The time oP the year Chat excavations can be made is
<br />affected by the depth Co a seasonal high wafer table and the susceptibility of the soil to flooding. The resistance of
<br />the excavation wall s. or bands to sloughing or caving is affected by soil texture and the depth Co the water table.
<br />DWELLINGS AND SMALL COMMERCIAL BUILDINGS are structures bui1C on shallow foundations on undisturbed soil. The load
<br />limit is the same as that for single-family dwellings np higher than three stories. Ratings are made far small
<br />commercial buildings without basements, for dwellings with basements, and far dwellings withouC basements. The ratings
<br />are based on soil properCies, aiCe features, and observed performance of the soils. A high water table, depth to bedrock
<br />or to a cemented pan, large stones, slope, and flooding affecC Che ease of excavation and construction. Landscaping
<br />and grading Chat require cuts and fills cf more than 5 or 6 feet are not considered.
<br />LOCAL ROADS AND STREETS ,have an all-weather surface and Carry automobile and light truck kraffiC all year. They
<br />have a subgrade of cut oz fill soil material, a base oP gravel, crushed rock, or stabilized soil material, and a
<br />flexible or rigid surface. Cute and fills are generally properties, site PeaCuzes, and observed performance of the
<br />soils. Depth tq bedrock or to a cemented pan, a high water Cable, flooding., large stones, and slope affect the ease oP
<br />excavating and grading. Soil strength (ae inferred from the engineering classification of the soil), shrink-swell
<br />potential, frost action potential, and depth to a high water table affect the traffic-supporting capacity.
<br />LAWNS AND LANDSCAPING require soils on which turf and ornamental trees and shrubs can be established and
<br />maintained. The ratings are based o_n soil propert.iea, site features, and observed performance of the soils. soil
<br />reaction, a high'waCer table, depth to bedrock or to a cemented pan, the available water capacity in the upper a0
<br />inches, and the content of salts, sodium, and sulfidic materials affect plant gzowth. Flooding, wetness, slope,
<br />stoniness, and the amount oP sand, clay, or organic maCCer in the surface layer affect trafficability after vegetation
<br />is established.
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