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A <br />• built using this method. <br />3.5.1.1 Aoad Profiler sad Crory 9rctioar <br />Road width varies in accordance with it's purpose. Haulroads and <br />access roads typically have a minimum 60-foot width, except for a portion <br />of the North Haulroad shown in profile R-R' on Exhibit 3.5-23. This <br />section of the haulroad is narrower due to topographic constraints. Light <br />Use roads are typically 20 feet wide. Exhibits 3.5-3 and 3.5-4 are typical <br />cross sections of haulroad and access roads, respectively. Road profiles <br />for existing roads are shown on Exhibits 3.5-6, 3.5-8, 3.5-10 through 3.5- <br />13, 3.5-18 through 3.5-20, 3.5-23 through 3.5-25 and 3.5-30. Cross <br />sections for existing sections of roadways whose cut or fill slopes exceed <br />the maximum regulatory slope limits have also been prepared. These cross <br />sections are shown on Exhibits 3.5-32 through 3.5-36. A slope stability <br />analysis for these roads is shown in Section 3.5.2.2. <br />• 3.5.1.1 stability Aaalyri• of Roadway Cut nad Fill 91oya• <br />A common index used to compare the stability of slopes is the factor <br />of safety. The factor of safety is defined as the ratio of the total force <br />available to resist sliding to the total force tending to induce sliding. <br />In slope stability involving materials such as overburden soils and crushed <br />rock, there are no structural patterns in which a failure path can be <br />defined. The failure surface is free to find the line of least resistance <br />through the slope. In this case, the failure surface generally takes the <br />form of a circular failure. The factor of safety calculations in this <br />slope analysis is based on that theory. To calculate the factor of safety <br />for roadway cut and <br />• <br />Mid-term '94 3.5-2 September 15, 1994 <br />