Looked at a new job this afternoon. Property is on the lake and the landscape is hilly. The owner wants an area built up so he can place a carport on it. It is 20'x25' with a gradual 5' slope (rear of area is 5' lower than front) from front to back of pad. How would you recommend going about this project? I plan on using timbers or railroad ties to make the border that holds the fill to build up the area. But what would you use to build the area up - and how would you pack it so that it wouldn't settle. White rock will be placed on the top - how many inches would you use for your top? Under this carport area he will be parking a boat and maybe vehicle. Thanks for the help.