I have a client that has an erosion problem. His back yard is the peak of a very tall hill and the right side of his yard is getting very eroded. When i first saw the job i thought a set of retaining walls terracing it down would slow down the water enough to control the water. then once i got the transit out and started measuring the elevations i found out that it would be nearly impossible and definitely not practical to terrace it down. after i told him this and that what he was looking for was beyond my ability he told me that 2 other contractors had been out and done the same thing as me. So i thought i would take a more simplified approach to it by possibly putting rip rap down the side of the hill to slow the water down. This also caused a few problems because I have never used riprap before and i am not 100% sure that it would work, or if there is a way to make riprap look better. Any suggestions or rules when using riprap would be greatly appreciated. If it is necessary i can get pictures of the job site. Thanks for any help.