In rocky areas, it is often difficult to ground radio towers so that energy will dissipate when lightning strikes. One solution, Mr. Arnott said, is "to just pour a trough of conductive concrete at the base." http://www.nytimes.com/2002/03/21/technology/circuits/21NEXT.html?rd=hcmcp?p=042fqH042fpu360X012000mrXCgrXGV