7. URG - Coal Generation

SCE's coal-fired generating resources consist of (1) Four Corners Generating Station (Four Corners) Units 4 and 5, of which SCE has a 48% ownership interest, and (2) Mohave Generating Station Units 1 and 2, of which SCE has a 56% ownership interest. Arizona Public Service operates the Four Corners Plant. The Mohave Plant did not operate during the Record Period. SCE provided information on Four Corners Coal costs and performance during the Record Period.

In its testimony, DRA determined that a 2.5 day forced outage at Four Corners Unit 5 caused by (1) failure of the baghouse air pollution control equipment, (2) a control problem on the boiler feed pump due to excessive sediment in the hydraulic oil, and (3) problems with the auxiliary steam controls due to excessive moisture was unreasonable. SCE addressed the outage in its rebuttal testimony; and, in its opening brief, DRA did not recommend a disallowance associated with the outage.

Based on the testimonies of SCE and DRA, we conclude that the Four Corners Units 4 and 5 were operated reasonably during the Record Period. This includes actions taken with respect to the Unit 5 forced outage described above.