BILLINGS, Mont. — A utility company is asking Montana regulators to allow it to increase prices for natural gas for more than 84,000 customers in the state.

Montana-Dakota Utilities said Tuesday that the requested rate hike would increase a average residential customer’s bill by about $30 annually.

The utility says the move would raise $2.8 million in annual revenues needed to cover costs for replacing, operating and maintaining natural gas pipelines.

The request must be approved by the Montana Public Service Commission.

Montana-Dakota Utilities also serves customers in North Dakota, South Dakota and Wyoming.