I'm sure that there are better ways of building a boat ramp than what I did but it works very well for my bass tracker fishing boat. I first did as Meadowlark suggests and smoothed out an area for the ramp with a front end loader. A dozer would be better. I then took bags of cement and laid them in the cut out bank area. I left them in the bags and the cement hardened. It has worked well and was fairly inexpensive. At 2 dollars a bag it probably cost about six hundred dollars.