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Winnipesaukee Divers · 05-25-2004, 12:40 PM

Keep in mind that your boat displaces 2500 pounds of water, that also means it can lift that much weight before it sinks. The longer the rode the harder it is to lift the amount, also surface adhesion will have a much greater impact on the whole equation as well. Cement will louse 62% of its weight in water granite is 20% and iron is 5%.

The state environmental agency takes a dim view on using any ferrous materials (iron) in the water as it eats up the available oxygen in the water as it supports rust. The DES guy that visited us at WCYC the day we were installing 10 new mooring was very emphatic that we would not be using it as a mooring weight. He never said what the penalty would be if we had not been in compliance nor did I ask either.

I needed to do a quick temporary mooring for a fellow on Merrymeeting Lake a few years back. I stopped in at a concrete products plant and bought a round cover to a septic tank. It was 8” thick and 6’ in diameter and weighted about 600lbs. I rolled it (caveman style) off my trailer, down this drive right into the lake. I hooked up a lift bag and dragged it to where he wanted it and sank it. It’s holds his 20 runabout just fine because it has 2 to 1 scope on the rode and has key element to the equation, a broad surface contact with the bottom and it is in a somewhat shelter cove (not exposed to much fetch). It's funny, how that old saying always come true...."Temporary always turns to permit, so do it right the first time"…

I’d like to help you with this project, but I’m way over booked with mooring service work and definitely feeling my age these days as well.

05-25-2004, 12:40 PM	#11
Winnipesaukee Divers Senior Member Join Date: Apr 2004 Location: Exeter, NH or @ WCYC on weekends Posts: 250 Thanks: 7 Thanked 46 Times in 28 Posts	Temporary always turns to permit Keep in mind that your boat displaces 2500 pounds of water, that also means it can lift that much weight before it sinks. The longer the rode the harder it is to lift the amount, also surface adhesion will have a much greater impact on the whole equation as well. Cement will louse 62% of its weight in water granite is 20% and iron is 5%. The state environmental agency takes a dim view on using any ferrous materials (iron) in the water as it eats up the available oxygen in the water as it supports rust. The DES guy that visited us at WCYC the day we were installing 10 new mooring was very emphatic that we would not be using it as a mooring weight. He never said what the penalty would be if we had not been in compliance nor did I ask either. I needed to do a quick temporary mooring for a fellow on Merrymeeting Lake a few years back. I stopped in at a concrete products plant and bought a round cover to a septic tank. It was 8” thick and 6’ in diameter and weighted about 600lbs. I rolled it (caveman style) off my trailer, down this drive right into the lake. I hooked up a lift bag and dragged it to where he wanted it and sank it. It’s holds his 20 runabout just fine because it has 2 to 1 scope on the rode and has key element to the equation, a broad surface contact with the bottom and it is in a somewhat shelter cove (not exposed to much fetch). It's funny, how that old saying always come true...."Temporary always turns to permit, so do it right the first time"… I’d like to help you with this project, but I’m way over booked with mooring service work and definitely feeling my age these days as well.