Best way to do underwater topo

Try these guys...

http://seafloorsystems.com/support.html

Seafloor Systems Inc.
3113 Alhambra Dr.
Cameron Park, CA 95682

Underwater topo,eh? Best method is to be naked except for tennis shoes. Unless you are in snapping turtle country.:excruciating: :excruciating: :excruciating:

You'd be surprised how little water is needed for a company that only does shallow water hydro. How big and how deep and how close for the shots?

We have had good luck with this http://vexilar.com/products/index.php?prodNum=LPS-1 while running continous topo on the collector and adjusting the rod height.

I agree. Seafloor has some great solutions and John Tamplin is excellent to work with.

If you are already Trimble, the HydroLite by Seafloor is the way to go. We have one and it's a bit of a pain because we are Topcon. I think it's pretty seamless with Trimble, though. You should be up and running for about 5K which is pretty cheap for a Hydro unit.

You can also rent the Hydrolite for $125 per day which we are about to do for a small project.

Check out this nifty little "toy".

set up the T.S. on the ice, use a power auger to bore the holes and a lead sound to determine depth.

Colleagues- On the "Theme"

We have an upcoming project to verify the cubic capacity of a series of smallish sewage lagoon ponds that are no greater in width than 30' +/-.

We don't know how much sludge there is in the ponds (lots for a starter), so it is difficult to quantify how much more capacity there would be if the sludge was gone.

Obviously it would be a piece of cake to pump the lagoons out and get in there with a rod and rubber boots (for the X/Y/Z) as we have the X/Y of all the lagoon edges and their elevations down pat.

Wold there be a piece of sonar (?) equipment that could verify the pond depth through the sludge accurately or am I too optimistic ?

Thank you,

Derek

Multiple frequency, different wavelengths will have different penetration through the various layers.

Sonarmite/Hydrolite from Sea Floor Systems...

We are a dealer for them and rent them too.

EASY to use with your existing Trimble gear

Well...

since I can't swim, I'd drain the water, let the muck dry out, and shoot it using GPS. Then put the water back in.

Probably need some kind of permit, but you can always beg forgiveness by claiming you didn't know who to ask for permission...

Well...

that might cause a problem.....

This job is actually for the 1st phase of the new bridge next to the one the Delta Mariner knocked down last year

In the summer with a case of beer.

Or that slick remote control boat for only 70k or 90k.

Derek ....

google "Sludge Judge". I have one in Nome for work in the sewage lagoon there. A couple of modifications that I would make, but all in all it works pretty good.

-JD-

Here you go Randy, but a little place in Paducah may not like me giving away the goods. Share the knowledge.

Additional hardware is the Lowrance HDS 10 with side scan sonar. Take sonar pictures of questionable areas. Clients loved it. The Lowrance can hook up any gps unit with NMEA output. I have used Trimble. Piece of cake.

The software of choice is UNDERSEA. Takes the NMEA data from the Lowrance/GPS for direct input to laptop. The software draws the contours on the fly. Makes great maps and easy downloads of all data.

Cost $2000 for Gen 1 Lowrance fish finder and I think around $1800 for the software. Have fun.

Have fun, yes, but check your insurance first. Years ago, when I was working for another company, we were getting ready to do a small hydro job and decided to check the insurance. Our agent said our policy wouldn't cover anything that happened while the crew was in a boat.

Derek ....

JD-

Thank you for the lead.

Cheers,

Derek