Mountain Fuel Supply has asked the Utah Public Service Commission to approve a $358,000 rate reduction.

If approved, the adjustment will result in an annual decrease of 43 cents for the typical residential customer using 1,150 therms a year beginning Aug. 1.The request was made in a semiannual filing, when rates can be adjusted for changes in Mountain Fuel's gas supply costs.

The utility said this would be the ninth consecutive rate decrease since 1984, and the typical customers' bill has dropped more than 10 percent in the last four years.