PROVIDENCE, R.I. (AP) — The Providence Water Supply Board is stepping up its work replacing 360 miles of aging water pipes.

Workers have been slowly replacing the corroded pipe for years. Some of the pipes date to the 19th century.

Boyce Spinelli, the board's general manager, said Thursday that the state's biggest utility picked up the ace last year as other projects ended.

The Providence Journal reports that the $360-million plan calls for replacing unlined cast iron pipe with protective-coated pipe in the next 20 years.

The utility proposes to pay for the new pipe with a 24 percent rate hike, or about $6 a month for an average customer. It could raise as much as $14.6 million a year.

The state Public Utilities Commission is considering the request.

Photo Credit:SHUTTERSTOCK Laura Stone