Recently CMG installed a large 6 inch French Drain in Edmond. The customer had water running under his back porch step and into his basement. We did a Free Drainage Diagnostic and Estimate. The French Drain design that we proposed would intercept the surface water and subsurface water that was flowing under the steps. The French Drain design called for a 6 inch French Drain to be installed above and several feet away from the steps. It would run around the house parallel to the foundation and about 5 feet to the East. The French Drain would run past the steps to a point where water must cross the French Drain or run up hill to the steps which in this case was not possible. Once past the steps, the French Drain would transition to Solid 6 inch Drain Pipe and continue on around the house to the Pop-Up Emitter down hill in the side yard. Along the way we attached several Gutter Down Spouts into the French Drain.