Yes what he said.

I have four five gallon buckets as anchors for our dock. Air craft cable through a cloths line pulley. The pulley is hung off large eye hooks off the dock. One bucket is full of concrete with large eye hook poured in concrete. Other bucket is filled 80% full of concrete and hung half way off the bottom at full pool. Repeated on other side. Pulling the mass of the five gallon pails 80% full of concrete through the water takes 95% of the jounce out of the dock and it is nice and stable. Dock is 16X16 and all three of my kids are 180# (yes football is kinda big in our house) and it is nice for everyone even with the wife and I on the dock.

In my case the water level can go down 6 feet from full pool before both buckets are on the bottom.

Cheers Don.

Edit: you can just see the pulley at the front corner of the dock right at the water level in the first picture below.

Attached Images
2013-06-24 17.40.20.jpg inforaswim2.jpg
Last edited by DonoBBD; 03/08/14 07:32 AM.

[Linked Image from corvettejunkie.com]
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7/8th of an acre, Perch only pond, Ontario, Canada.