$23\mathrm{.}11$ Grade stakes for a pipeline running between stations $0+00$ and $5+64$ are to be set at each full station. Elevations of the pipe invert must be $160\mathrm{.}85$ ft at station $0+00$

$736$ CONSTRUCTION SURVEYS

and $159\mathrm{.}72$ ft at $5+64,$ with a uniform grade between. After staking an offset centerline, an instrument is set up nearby, and a plus sight of $4\mathrm{.}06$ taken on BM A $($elevation $163\mathrm{.}42$ ft $).$ The following minus sights are taken with the rod held on ground at each stake: $(0+00,5\mathrm{.}31)$;$(1+00,5\mathrm{.}32)$;$(2+00,5\mathrm{.}35)$;$(3+00,5\mathrm{.}85)$; $(4+00,5\mathrm{.}84)$;$(5+00,6\mathrm{.}73)$;$(5+64,6\mathrm{.}73)$ and $(1,4\mathrm{.}06).$ Prepare a sel 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.