Two Democrats are calling for an investigation into a contract awarded to Whitefish Energy to restore power to Puerto Rico.

Sens. Maria Cantwell Maria Elaine CantwellHillicon Valley: Zuckerberg acknowledges failure to take down Kenosha military group despite warnings | Election officials push back against concerns over mail-in voting, drop boxes Bipartisan senators call for investigation of popular fertility app The Hill's Coronavirus Report: Mike Roman says 3M on track to deliver 2 billion respirators globally and 1 billion in US by end of year; US, Pfizer agree to 100M doses of COVID-19 vaccine that will be free to Americans MORE (Wash.) and Ron Wyden Ronald (Ron) Lee WydenGOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate GOP senator blocks Schumer resolution aimed at Biden probe as tensions run high MORE (Ore.) sent a letter to the Government Accountability Office (GAO) requesting a probe.

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"We are writing to request that you investigate the use of public money to reimburse work completed under a contract between Whitefish Energy Holdings LLC (Whitefish) and Puerto Rico Electric Power Authority (PREPA, or Autoridad de Energia Electrica) to restore PREPA's electric power system in the wake of Hurricane Maria," the senators said in the letter, addressed to Eugene Dodaro, the head of the GAO.

"Restoring and rebuilding the grid is central to the public health, welfare, safety, and economic growth of Puerto Rico. Like all U.S. citizens, Puerto Ricans deserve no less."

JUST IN: Top Ds on Senate Energy Cmte & Finance Cmte (@SenatorCantwell & @RonWyden) send letter to GAO asking them to investigate Whitefish Energy Deal: pic.twitter.com/0yN4AZ9BWI — Frank Thorp V (@frankthorp) October 26, 2017

Whitefish Energy, which is based in Interior Secretary Ryan Zinke's hometown in Montana, signed a $300 million contract to help overhaul the island's grid following Hurricane Maria.

The deal raised eyebrows. The company is only two years old and had just two employees when PREPA signed the contract.

In their letter, the two lawmakers cited recent reports they said "raised serious allegations about the nature and circumstances surrounding" the contract.

"Among the principal concerns raised in these reports are the potentially inflated costs of time and material in the contract relative to comparable at-cost utility mutual aid agreements," the letter said.

The senators also cited the "contemporaneous communications" between Whitefish and administration officials including Zinke.

"We are intent, along with many of our colleagues in Congress, on providing the hardworking federal workers, private sector workers, utility crews, and Puerto Ricans the necessary federal resources to restore electric power immediately on the island and to rebuild the grid in a more resilient way that facilitates long-term growth," the statement said.

"It is essential that as we deliver these resources we have confidence the funds are being spent wisely and cost-effectively."

The request comes after the company feuded earlier this week with the mayor of San Juan after she called for the contract to fix the island's hurricane-ravaged electrical grid to be "voided."

The governor of Puerto Rico this week requested an audit into how the company won a multimillion-dollar contract to restore power to the island.

Puerto Rico's financial oversight board also reportedly plans to appoint an emergency manager to oversee its electric utility.

Most of Puerto Rico is still without electricity more than a month after Hurricane Maria hit the island.