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y <br />Floating debris is to be caught by debris posts concreted into the <br />ground at the upstream end of the inlet basin. This debris will be the <br />smaller size vegetation, if any, because the natural stream channel is <br />too narrow and constricted to pass large material ouch ae tree trunks. <br />The large boulders in the upstream channel create a debris trap in <br />themselves and almost all vegetative and bedload debris is trapped in <br />the natural pools. <br />5. (C-4) <br />We do not recommend a camber in this pipe for the following reasons: <br />a) The pipe grade is close to bedrock throughout its length, thus <br />minimizing any potential settlement. <br />b) At the steep grade of 12.6%, it would take a settlement of over ten <br />feet to create a sag in the pipe grade. <br />c) Hydraulics are not the governing condition in this pipe. The pipe <br />would flow only about 1/2 full under a 100-year flood. Any <br />flattening of the slope would not significantly affect hydraulic <br />conditions. <br />6. (C-5) <br />Culvert length calculations are shown in the attached design memo. We <br />have a safety factor in that the ends of the pipe will be located in <br />riprap and buttress rock fill, which will be adjusted to match the pipe <br />ends. Also, the embankment is designed so as not to spread. i <br />7. (C-6) <br />To be covered by Golder Associates responses. <br />s~.9~~~.~,'r~3 <br />