I am in the beginning stages of building a pier on my 2 acre pond. We have recently drained enough water from the pond so that we will be able to dig holes and set our main posts in concrete. Once the concrete settles and the pond refills we will have a strong base for our pier that should remain there for years. My question is... What should we use as "main posts"? We have thought about "treated" 4x6's, "cresote treated" railroad ties, and telephone poles. Does anyone have any suggestions/ideas about what we should use? We wany something that will be able to withstand being under water. Also if anyone know of any links that might have "blueprints" for building piers it would be greatly appreciated. We were thinking about something octogon in shape and about 20x20 in size... Thanks, Ragu