Optimum placement of a pipeline on a power line right-of-way to reduce electromagnetic coupling effects is discussed. Grounding methodologies for reducing induced voltages on the pipeline for steady state and fault current coupling are presented. For clarity, the fault current coupling cases are segregated according to mechanism, i.e., inductive and conductive cases. The relative benefits of continuous single and two horizontal wire mitigation systems are discussed. The relative reduction in pipe coating voltages and touch and step potentials is presented for each type of mitigation system. The usage and characteristics of gradient control mats are discussed. Practical considerations relative to the mitigation of lightning effects are presented. Keywords: ac interference mitigation, pipeline voltage mitigation, ac voltage induction, inductive interference mitigation, conductive coupling mitigation, induced ac voltages