Ring Fencing Rocky Mountain Power in Utah

This article reviews the principles for ring fencing (insulating) a public utility and those principles as applied to regulated utilities in Utah, where ring fencing Rocky Mountain Power requires ring fencing its parent PacifiCorp. Specific ring-fencing challenges include the geographic diversity of PacifiCorp and complexity of its corporate structure relative to smaller utilities, as well as possible cross-subsidization between PacifiCorp and the various, diverse and changing business interests within the Berkshire Hathaway conglomerate, PacifiCorp's ultimate parent.