Front Yard Reconstruction: side wall

The rain lifted leaving a muddy mess. But the new foundation for the fountain held solid. After the area dried, I finished the foundation and I am ready to reassemble to fountain. I reapplied the quadruple anti-weed fabric. I also took a 2'x2' sidewalk paver and drilled a 2" hole so I can set it over the electrical conduit to be the above grade base for the fountain. I removed the 16 cubic feet of dirt (now mud ) that I had excavated when I dug the hole for the fountain's foundation. Next, I finished the side wall shown in this picture. The wall is six feet long and 30 inches tall with a 3 inch gravel base below grade. The wall separates the driveway from the rock garden.