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  1. rrayw747

    laser grading

    Thanks guys for your input...rrw
  2. rrayw747

    pvc vs rcp

    thanks for the input, we got a free lunch but it looks like the County is staying mostly with RCP
  3. rrayw747

    laser grading

    We are cutting a ditch at a grade of 0.1% using a GRADALL and a rotating laser. Where is the absolute best position for the tripod mounted laser to insure optimum accuracy? How do you deal with curves in the ditch? Any other basic information in this area would be helpful. thanks, rrw
  4. rrayw747

    pvc vs rcp

    What are the pros and cons regarding the use of black corrugated culverts vs concrete pipe for storm drainage? Thank you, rrw

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