. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. full informationconcerning the conditions below the surface of the ground. The costof such examinations, though large, is not prohibitory, and fundsexpended in this manner usually result in the greatest ultimate econ-omy. For making such examinations there are commonly employedtest pits, wash borings and core borings. The simplest and most common method of making examinations indry earth or indurated material is by means of ordinary test pits oropen wells dug by hand. In al
. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. full informationconcerning the conditions below the surface of the ground. The costof such examinations, though large, is not prohibitory, and fundsexpended in this manner usually result in the greatest ultimate econ-omy. For making such examinations there are commonly employedtest pits, wash borings and core borings. The simplest and most common method of making examinations indry earth or indurated material is by means of ordinary test pits oropen wells dug by hand. In all parts of the country are to be foundlaborers who have had experience or who can be quickly instructedin the matter of digging and shoring out the open hole. Such testpits afford access to the ground in a way which permits very thoroughexamination. It frequently happens that the conditions are such that the ordi-nary open test pits cannot be economically utilized over the entirearea. This is especially the case if the amount of water encounteredis too great to be handled by ordinary pumps. It then becomes Plate XI. Fig. a.—Storage dam site, Roosevelt Dam. Salt River Project, Ariz.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectirrigat, bookyear1913
