Electrolytic grounding is often the only way to provide the grounding system with the required and permanent resistance. This grounding terminal type is used in complex soils and typically in permafrost soils. Modern materials used in arrangement of the electrolytic grounding allow to minimize the advantages of this grounding terminal type and achieve permanently high characteristics.
In particular, one of "side effects" of the electrolytic grounding is unfrozen soil around the electrode, or thawed lens. This event, if you fail to control its size, can cause significant harm to surrounding structures: roads, supports, foundations and other structures supported by the soil.
Read the article for more details about the predictability of the thawed lens area when using electrolytic grounding.