Establish 30 control points (concrete monuments) for a small municipality covering about 1,000 acres. 50/50 on what can be established via GPS or conventional. Need to provide sketches, ties for each one. They haven't spec'd a tolerance, just "survey quality" control.
Thanks,
CC
$2,000,000.00 give or take $1,999,000.:-P
I like really big ballparks.
Based on my take on the requirements would be, I'd say probably $15,000-$30,000.
$2500 per point for a total of $75,000
to
$5000 per point for a total of $150,000
I would use a bonded, insured, licensed contractor to install the monuments which is not cheap in of itself.
no specs on the concrete? what are your soils like (i'm in a sandbox, so setting 40" concrete monuments is relatively easy)
how about spacing? are you looking for an even distribution over the 1000 ac?
how's the coverage? do you have a nice bald mountain that you could see all these from?
will you be able to set 3-4 GPS points per control monument that you cannot directly see in order to shoot it in?
2500 a control point seems high, but may be right to ballpark.
Throw some money in there to cover the onslaught of phone calls from everyone else that wants to use the control for next five years, and wants to argue 0.02' with you.:-S
$25k
> Establish 30 control points (concrete monuments) for a small municipality covering about 1,000 acres. 50/50 on what can be established via GPS or conventional. Need to provide sketches, ties for each one. They haven't spec'd a tolerance, just "survey quality" control.
Well, if the control points don't include intervisible pairs for use in conventional traversing, I'm not sure what good the whole effort will be. If GPS is commonly used by land surveyors in that area, why would you need more than four or five monuments, all in reasonably secure locations and well-suited for GPS occupation.
In the age of GPS, isn't the main purpose of monumented points just to maintain some coordinate system that is in use locally? Control points that aren't GPSable are not really excellent for that purpose.
Around here that would probably go for $6,000 or less. The technique would be do drive an 18" Rebar, take post hole digger and dig about 6" deep around, fill said hole with sacrete, and slap a cap on it. Come back tomorrow and give it a 30 second RTK shot make a sketch and move on. If you can not use GPS, set 2 PK nails and do 15 seconds of RTK on each one, then take one angle and one distance to the control monument. Sketch and move on.
Steve,
Those monuments are GIS monuments...it says so on the fiberglass guard stake.;-)
And as far as 'sketch-ups' go: "...this Office (Arkansas State Land Surveyor) and the Board (Arkansas State Board of Licensure)consider surveys to be public documents. As a result, you should not place any language, symbol, statement or notice, or in an other way attempt to restrict the use of that survey by the public and that doing so may well be considered misconduct and subject you to disciplinary action."
You have been warned!!! NO COPYRIGHT FOR YOU!!!
DDSM
(COPYRIGHT 2013)
Dan,
The sketches will be on plane paper, and I will not use my Timely Templet because it might be copy write some where. I will use 4 H lead to facilitate copying the sketch though.
Horizontal only, or vert too?
Anyway, far too little info for a bid.
Ballpark for 30 mons in state plane flavor of your choice is +/-0.05 to each other is $30k + installation charges + vert + ties to real world + + +
And... Kent is right, which he usually is when he wants to be.
Truth is, use the money to install a CORS and blue book it and add it to the network in your area. One "mon" covers the whole place. Include a terrestrial Mon or two with good sky so you can check in and make sure they can calibrate to the city's realization of whatever flavor of state plane that they use.
