Most Rocky Mountain Power customers will not see a rate increase under the utility's annual Energy Cost Adjustment Mechanism.
The Idaho Public Utilities Commission has approved an adjustment that will allow the company to recover $15.8 million in power supply costs not already included in base rates.
Most of the cost will be paid by Rocky Mountain Power's tariff customers. The increase paid by Monsanto will cover $6.34 million in power supply expense and Agrium's increase will provide another $493,000.
The cost adjustment is allowed to help the utility cover its power supply expenses due to changes in market rates, transportation expense and expiration of contracts with energy suppliers.