The interest is piling up on the scrapped ARC Tunnel project. New numbers released by the Star-Ledger says the state is spending around $300,000 a month in legal bills and will be charged $225,000 a month in interest to the federal government if they end up having to pay the full amount. The federal government put out $271 million for the project but upon its cancellation, the federal government ordered the state to pay the amount back. Gov. Chris Christie is battling the federal government on the repayment on the money.