Utah's Public Service Commission has approved new depreciation rates for Mountain Bell equipment, which will improve company revenues, but not enough to force phone rates down.

The new depreciation rates, retroactive to Jan. 1, will increase annual depreciation expenses by $6.3 million for Mountain Bell, which recently changed its name to US WEST Communications. Of that, $1.4 million will be allocated to the phone company's Utah jurisdiction.Under the new rates proposed the Utah's Division of Public Utilities, Mountain Bell's local revenues from the depreciation write-off would be $1.1 million.

But, regulators said the revenue increase doesn't warrant a change in customer rates.