Thanks Bill for the advice and the links. The weather finally cooperated this week -artic air made 4" of ice and I was able to spud a number of holes and get an idea of the depth. Water level is 'normal' now. Deepest spot was 14 feet. Had several 13's too - at least 1/4 of the pond is that deep. Paced it off and it's about 1/3 acre in area.
I did notice a lot of bubbles every time my weight hit the bottom - is that normal?
Also spent the last week trolling the forums - a lot of great info here. I see that aeration is preferred over circulating water. If I already have a pump is it still recommended to buy an aerator? If so, I probably need one that can do 7.5 psig with this pond depth, right?
After reading forums goals would be a) stop the duckweed blooms and b) get a bass / bluegill system going with the target of consistently raising 8+" bluegills...
Thanks,
All_wet