@dmyhill?ÿ
Oh the datum info was there, and the physical markers were in good shape. They would have been workable if they weren't all located literally in the middle of traffic, and there weren't twelve lanes of highway cutting through the project.
I totally understand that it is super difficult to get visibility across highway. I wasn't expecting that. But for the scale (and $$$) of this job I was expecting at a minimum two pairs of points, one pair on each side of the highway, which were out of the way of the bulk of construction and could be occupied immediately to verify positions and set out/densify the network.
Placing coordinates on CL mons that can't be occupied without shutting down two major city streets is not really "setting control" for a major public works project, in my humble opinion.
And yep, we had to get traffic control out there for that I-5 point. Fit beautifully, but we had very limited time in which to observe it and add it to our control calcs. I'm a little surprised at how many DOT CPs are on the wrong side of the guard rail, but then again I haven't been working here that long.
There isn't a pole along the shore around here that doesn't have a nail set for a TBM.
@rover83?ÿ
The SIP is part of the problem, IMHO. It requires all the monuments to be noted, so why include any additional benchmarks? Chances are that whoever did the topo has a control network that tied to those points. They would never revisit them, but there is no benefit to sharing that control.
As for the wrong side of the rail, I imagine that having unlimited tax dollars means that you place the control point where convenient, and do not worry about the traffic control costs.?ÿ