Well, funny you should ask. I just had my retaining wall, a concrete one that should of lasted a very, very long time rebuilt. This time it cost more but it was done correctly! You see I foolishly listened to a friend a few years back and hired a hispanic contractor, this was a big mistake. They made a mess and one of the crew broke into a neighbors garage a few weeks later and fortunately was caught on camera. We called them back for another Job and the guy showed up and was then arrested. Anyway, they also built the wall poorly. So this time it was built by a European and it is a work of art by comparison.