When blowing a line thru this pipe for the local utility we couldn't get the line thru. figured we had a broken pipe so we used some fish tapes to mark out approx were we thought the break was. lo and behold right were Mr. fence man set his post for the gate. We even provided as builts and he still hit it..Nice little change order though.
We sure did charge them and so did the excavator!! That is the marker tape you see.
this is near the end of a run of approx 1000' of parralell 4" with 1 run each of telephone and fire alarm both 4" we have yet to pull in.. should be fun!