Question: Grade stakes for a pipeline running between stations 0+00 and 6+37 are to be set at each full station. Elevations of the pipe invert must
Grade stakes for a pipeline running between stations 0+00 and 6+37 are to be set at each full station. Elevations of the pipe invert must be 843.95 ft at station 0+00 and 847.22 ft at 6+37, with a uniform grade between. After staking an offset centerline, an instrument is set up nearby, and a plus sight of 5.32 taken on BM A (elevation 853.63 ft). The following minus sights are taken with the rod held on ground at each stake: (0 + 00, 5.36); (1 + 00, 5.86); (2 + 00, 5.88); (3 + 00, 6.47); (4 + 00, 7.53); (5 + 00, 8.42); (6 + 00, 8.89); (6+37, 9.12) and (A, 5.36). Prepare a set of suitable field notes for this project (see Plate B.6 in Appendix B) and compute the cut required at each stake. Close the level circuit on the benchmark.
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