I am hoping for a bit of help at least thats my plea. My task for this winter and spring is to prepare the part of the back garden for the Railway I want to put down. Having never undertaken such a task I am a bit worried I will get something wrong and it turn out a huge catastrophy (not unknown for me) The problem I have is where I want to build, the grass gets water logged as we have an underwater stream going from the front garden to the back garden. So any ideas or does it not matter what I put on top. I am worried about it sinking. Has anyone got any tips for building a railway garden.