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<br />5.A.(6)(d) For Class III dams, other than minor ones, the <br />report shall include the field soils classification, geotechnical <br />logs, standard penetration tests and the requirements of Rule <br />5.A.(6)(c) Sections (1), (2)" and (6). The foundation exploration <br />shall include drilling to, and penetration of the bedrock, or 1.5 <br />times the height of the dam, whichever is less. <br /> <br />5.A.(6)(d)I Minor, Class III and all Class IV dams shall <br />include field soils classifications as a minimum. <br /> <br />5,A.(6)(e) For all dams except minor Class III and all Class IV <br />with a spillway located on an earth foundation, the report shall <br />include the following: <br /> <br />1. Soil classification; <br /> <br />2. Soil profile logs along the channel extending at least <br />five feet below the bottom of the spillway; <br /> <br />3. Density or bearing capacity of foundation; and <br /> <br />4. Gradation of soils. <br /> <br />5.A.(6)(f) For all dams except minor Class III and all Class IV <br />with spillways located on a rock foundation, the report shall include <br />a geologic description of the rock, including bedding and jointing and <br />demonstrate THAT the site is adequate to accommodate the proposed <br />spillway. <br /> <br />5,A.(6)(g) The following criteria shall be required, as a <br />minimum in the geotechnical design: <br /> <br />1. The loading conditions shall not exceed the allowable <br />stress of the foundation and appurtenant structures; <br /> <br />2. Seepage through the embankment, abutments, and the <br />foundation shall be controlled to prevent internal erosion and <br />external sloughing; <br /> <br />3. The embankment shall be protected against external <br /> <br />erosion; <br /> <br />4. The crest width shall be equal to the vertical height <br />plus freeboard in feet divided by 5 plus 10 feet. However, the <br />maximum crest width required shall be 25 feet; <br /> <br />- 20 - <br />