A mega-yacht seized by U.S. authorities from a Russian oligarch is costing the government nearly $1 million a month to maintain, according to new court filings.

The U.S. Department of Justice is seeking permission to sell a 348-foot yacht called Amadea, which it seized in 2022, alleging that it was owned by sanctioned Russian billionaire Suleiman Kerimov. The government said it wants to sell the $230 million yacht due to the “excessive costs” of maintenance and crew, which it said could total $922,000 a month.

“It is excessive for taxpayers to pay nearly a million dollars per month to maintain the Amadea when these expenses could be reduced to zero through [a] sale,” according to a court filing by U.S. prosecutors on Friday.

The monthly charges for Amadea, which is now docked in San Diego, California, include $600,000 per month in running costs: $360,000 for the crew; $75,000 for fuel; and $165,000 for maintenance, waste removal, food and other expenses. They also include $144,000 in monthly pro-rata insurance costs and special charges including dry-docking fees, at $178,000, bringing the total to $922,000, according to the filings.