got this email chain- my answer is the top in blue.....
All-
1- IÛªll have the crew review their .raw files to check for instrument set-up errors. This should give us a starting point and weÛªll get back to you, on a solution/resolution.
2- The issue with the control points being the same is not a problem. TheyÛªre imported into the raw file when itÛªs being created. If they were different ÛÒ that would be its own problem.
3- This is Pre-construction surveying data for this agency; we use feet and decimal feetÛ?. If everyone could do that, that would be greatÛ?
From: design project manager
Sent: Tuesday, November 24, 2015 1:57 PM
To: rankin_file
Cc: misc construction poges; misc. design poges; jr Designer
Subject: job in Zootown - Survey Discrepancies
Importance: High
Rankin,
See below. Please advise how we should use the survey data or if there adjustments that you need to make. Can all shots be adjusted by 3Û or is there something else going on here?
Let us know if you need further information.
design project manager
.
.
From: Jr Designer
Sent: Tuesday, November 24, 2015 10:05 AM
To: design project manager
Cc: Misc. Design poges
Subject: job in zootown - survey discrepancies
Design Project manager,
While designing the ÛÏbulboutsÛ on the two southern corners of the street A and street B intersection I noticed a fairly large discrepancy between the original survey and the pickup survey elevations. Attached is a spreadsheet that shows points that were taken in both surveys that are too close together to have more than a minor difference in elevation. There is an average difference of 3.31 inches in elevation between corresponding shots in the surveys. The number, type and locations of the shots indicates that one of the surveys was off from the beginning and not due to something part way through the survey. The most interesting and perhaps the most troubling part is that the Traverse Point located on the S/SE corner shown in both surveys has the same elevation. As far as I can tell it is the only point on the two corners that has the same elevation.
Note: If the original survey is the one that is off, we will most likely have to have a new survey of the other corners to ensure an accurate design.
Please advise on how to proceed from this point on.
Waiting for the "you need to be more nicer" phone call.....
Happy Thanksgiving.
Rankin, are they saying 3.31 feet?
Like between 29 and 88 elevations?
MightyMoe, post: 346557, member: 700 wrote: Rankin, are they saying 3.31 feet?
Like between 29 and 88 elevations?
no- he specifically meant inches-
they spelled it out in his email and the attached file was a series of eop and TBC shots he'd extracted the elevations (in decimal feet) for and used the power of excel to convert to inches.... I'm pretty sure it's a rod bust....
Not just inches - thousandths of an inch. I'd suspect an instrument measure up bust first, then rod ht.
I was thinking the difference between gutter and top of curb...?
3.31", that's some tight surveying.
And topo too:-)
Does look like some important points (hard surfaces I'm guessing).
