20130308PAC to Monsanto 12-035-102 DPU 1.18.doc

DPU Data Request 1.18

Please provide an explanation of the Semi-Annual Hedging report Attachment E.

Response to DPU Data Request 1.18

The Company assumes that the reference to “Attachment E” of the Semi-Annual Hedging Report, should be referenced as “Confidential Attachment E”. Based on that premise, the Company responds as follows:

Confidential Attachment E of the Semi-Annual Hedging report is included to supplement the To-Expiry Value-at-Risk (TEVaR) figures cited in the body of the report.  The attachment provides further information on how TEVaR is calculated.  For additional information, please refer to Confidential Attachment DPU 1.18.

Confidential information is provided subject to Utah PSC Rule 746-100-16.

12-035-102/Rocky Mountain Power
January 2, 2013
DPU Data Request 1.18