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• <br />-, <br />-8- <br />}_r <br />optimum. Llay and granular soils and broken claystone bedrock (maximum <br />8-Inch size) obtained from cut areas can be utilized for construction of 4 <br />required fill sections. <br />(6) .Sufficient depth of ballast should be provided immediately below ties <br />and tall system to distribute load(ng. <br />(7) 'Site grading should be accomplished with tnspectfon and testing to <br />assess compliance with recommended specifications. <br />Some settlement of embankment areas Is anticipated but should be within <br />tolerable limits. Greatest potential for settlement will be in natural <br />:•2 <br />drainage areas where upper clay soils and required fill depths are the <br />greatest. We estimate that settlement will range between approximately <br />2 and 5 inches, which should not pose any unusual problems. Settlement <br /> <br />should occur mostly <br />Luts: In clay and <br />of 1}:1 (horizontal <br />drainage proYlsions <br />these slopes 'can be <br />will be affected by <br />during construction. <br />granular overburden soils, permanent slopes on the order <br />to vertical) should remain stable assuming adequate <br />and erosion protection is provided. Some raveling of <br />expected. In claystone bedrock, cut slope stability <br />the bedding irregularities and Jointing system. These <br />rock dlscontlnuitles will create a potential for sliding of the blocks along <br />the Joint faces. The claystone bedrock Is poorly cemented and will probably <br />slake and weather to slopes on the order of 1:1. Permanent cuts into the <br />bedrock should be na steeper than 1:1. <br />If slope faces are to be revegetated, or if continual maintenance is not <br />desired, flatter slopes on the order of 2:1 would be preferabje. Access <br />should also be provided at the toe of the slope for perfodtc cleanup. Free <br />• <br />water was generally not encountered during drilling but did occur when checked <br />several days later. Therefore, the development of some seeps In granular <br />,. ~.. .. -- . :~. ~<~ :~a:= _ .,, a ...~.. ~ .. .. _. <br /> <br />