My crib dock is a 3 finger setup with 2 cribs under each finger and tie posts that go to the lake bottom as well. Mine are driven with a sledge only slightly in though. I am having some issues with the end of my docks dipping a bit, I may have my end tie posts removed and have new ones put in that are driven into the lakebed to help prevent this.
I am not a fan of ones that are not driven down and just bolt to the dock. A few houses down, there is a dock that has them bolted and cut off just below the frame and even with the light usage the dock gets (the dock has been there for years, but it has mostly been a vacant lot) they are all bent and twisted.
We run 2 circulators on timers and thermostats combined and have no issues, granted we are not on the wide open like much of Rattlesnake is. Next season we are thinking of doing 2 pile driven permanent boat lifts, this will help strenghten and take the load off the dock.
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