Whitefish Energy, the controversial energy firm repairing Puerto Rico's hurricane-wrecked power grid, is under fresh scrutiny for charging the island's power authority hundreds of dollars more per hour than its linemen receive.

The New York Times reported that the tiny Montana-based company—which doesn't have many of its own employees—contracted electrical workers from Florida at rates that range from $42 to $100 per hour, with an average rate of $63. Whitefish, however, has been charging the Puerto Rico Electric Power Authority (PREPA) $319 an hour for each worker.