Been lurking for a while, now I've got a question. I'm working on completing the landscaping on a couple caul de sacs in a new development, and the plan calls for 2 masonary walls at the entrance. These aren't retaining walls, just free standing, they will be of brick with cap stones (approx. 5' H x 9' L). Here's the problem. Come to find the location is on an easement that has a gas line, so the city wont allow for a footer to be dug. Now my brother-in-law recalls receiving some literature on a surface type footer that can be used for just such an application, but can't recall the details. Is anyone familiar with any type of "surface" footer? We're in zone 5. Any details and/or other suggestions would be greatly appreciated. Thanks all.