March 17 was not a happy St. Patrick's Day for PacifiCorp's coal fleet. Echoing recent actions by the Washington Utilities & Transportation Commission ("WUTC"), the Oregon Public Utility Commission ("OPUC") expressed serious reservations about the assumptions embedded in PacifiCorp's Integrated Resource Plan ("IRP") concerning anticipated expenditures for pollution control equipment at its fleet of coal-fired generators. While the OPUC did not take any specific action, it made clear that PacifiCorp will be required to engage in a substantially more robust modeling of the costs of pollution control and other upgrades for its coal generators.
The stakes for PacifiCorp's coal fleet, which consists of 26 units scattered across five Western states, are substantial. According to current estimates, PacifiCorp will be required to invest more than $4.2 billion for pollution control retrofits before 2023, not including any upgrades that may be required to comply with limits on greenhouse gas emissions. Based on a report from the Commission's staff, as well as comments from interest groups ranging from the Oregon Department of Energy to the Sierra Club, the OPUC raised a number of serious questions about the IRP's economic modeling, baseline assumptions, and timing of proposals for coal-related upgrades embedded in PacifiCorp's 2013 IRP update.