Wayne. B wrote:

The de-icer you describe works by bringing warmer water up from the
bottom. It will work OK as long as the water is deep enough to have
a
decent temperature gradient; you have enough units to cover the area
in question; and you have a reliable source of power.

Thanks Wayne
the water will only be about 2 feet to 3 feet at low tide depending on
which end of the dock that you are at, at high tide it may be another 6
feet. I was under the impression that it stirred up the water and
moving water would not freeze. I did not relize that it was going to
depend on the water's depth. Thanks for the info.
Anyone have any ideas?

On 24 Jan 2005 20:06:41 -0800, "richard"
wrote:

I was under the impression that it stirred up the water and
moving water would not freeze.

=================================

That's part of it but the big thing is bringing warmer water to the
surface. You have shallow water but a big tide range so it's hard to
predict just how it will work out. If the weather is cold enough,
frozen pilings are a real problem. I've heard stories of using chain
saws at low tide to free the ice.