Close up of Storage Shed river rock half-wall ... note the mortared bolts for the wood frame tie-in, the white pipe (for the electrical wiring), and the copper hose-bib pipe in the wall below it.  Not shown is the T in the copper water pipe and the drain pipe for the sink that will be inside.  The rockwork would later get finish mortared and then washed with muriatic acid to clean them all up.