Abstract
work involving soils. To aid the engineer, some modern county soil survey reports of the National Cooperative Soil Survey3 now contain soil engineering laboratory data and interpretations of agricultural data applicable to engineering. To date, about 45 such reports from 24 states have been published. Soil properties important to the engineer are shear strength, consolidation characteristics, gradation, plasticity, permeability to water, texture, depth, water holding capacity, reaction or pH, and topography. Agencies such as the Soil Conservation Service, Corps of Engineers, Bureau of Public Roads, various State Highway Commissions, and the Federal Housing Administration find this information useful in their work, and make interpretations based on those properties. The interpretations help engineers in construction and maintenance of roads, bridges, airports, building foundations, embankments, water storage basins, erosion control measures, drainage and irrigation systems, and sewage disposal systems.
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