Grabbed some of the concrete today. Next question is how the hell do I get it on a boat and placed? The tubes aren't light... but are awkward as hell.
Rope through the tube with a barrel on each end to float them?
I think you can find an approximate weight for the concrete tubes on the net, as well as the buoyancy provided by each drum. The weight of the concrete in water, should be reduced by about 36% due to their displacement.
Other option: Draw down your pond when you see a good rain coming and plant them using a tractor, skidsteer, etc.
Third option: Put a chain through the tube and tie a rope on each end of the chain. Could you roll the horizontal ones in place down the slope of your shoreline using 2-3 guys for muscle?
