The common bonding of underground ferrous structures to massive copper grounding grids creates problems for corrosion engineers and their attempts to cathodically protect the ferrous structures. Conflicts between copper and ferrous underground systems are discussed and alternatives are presented. A specific case history concerning production facilities in Sindh Province, Pakistan is presented. The case history includes the initial engineering evaluation and recommended system changes as well as the results of the recommended changes on overall performance of the cathodic protection systems in multiple production facilities.