One of the coolest ramps I've seen built was by a guy in Murchison, Texas. He laid a big piece of plastic on the ground where the ramp was to be built...the thick plastic used for greenhouses. Then, he set the forms, added the steel and poured the ramp on dry dirt. Next, he got his bulldozer and pushed the concrete slab into the lake. Voila', a boat ramp. It slid right off the plastic, into the lake. Of course, he knew the slope and put it where it would slide properly, etc.
What part of east Texas? Maybe this guy could help you.
