Well that should about make the area I need -- that'd be 30' X 40' 12" deep in sand.

I'll probably run it about 15' into the water and 15' up the bank and 40' wide.

The pond is full so I will use concrete blocks in the water and large timbers on the bank to hold it in -- along with shade cloth on the bottom.

Thanks everyone for your help. The kids will love it and my wife can have a place to get a tan (skin cancer). ;\)