I think it will make a great top, and I have a lot of it laying around gather dust so why not use it? So the way it sounds to me from what woodnthings and Ron_j are saying, it would be in my best interest to coat the top with epoxy as to keep the surface smooth over time. Probably more work than I want but it sounds like it'll be worth it in the end! Thank you both for that! Also the flooring is 3/4" and I have had it for several years, so it should be dry but to be safe I think I will bring it in and let it acclimate to the house before gluing it to the plywood. To answer Shoot summ, the way the flooring is made, the bottom of the flooring is fluted and will not be sealed completely, so I need to do something to seal the area that I want the river to "run" so the epoxy stays where I want it. Also I need a small channel to hide the LED strip so you can't see it from the top, so I was wondering if I could kill 2 birds with one stone. By mortising out around the edge of the river for a place to attach the LED's and then sealing them in along with making a barrier to keep the epoxy where I want it. My concern is that I don't know how the epoxy and silicone will react with each other (nor does the rest of the internet, or the guys at my lumber yard for that matter). The idea of the LED strip's is to make the river glow, and if I am clever enough maybe make it look like it's flowing, doubt that will happen, as I am not that clever... I am not that worried about the wood swelling. I can get it down below 5% moisture and then install it in a climate controlled area. Unless you think that could still backfire. I am open to all suggestions! Thanks again everyone!