People frequently ask me how to build a retaining wall and, of course, the answer is totally dependent on the conditions of the hill to be retained. Last Saturday, Johnny called my show to discuss a deck he had built and followed up with some pictures by email. The conversation continued and he sent some pictures of a retaining wall he built. I've watched the Oregon Department of Transportation build lesser walls than this one. Check it out and be sure to check back tomorrow to see the gold mine he constructed as his follow-up project.