 According to its own planning documents, the federal government estimates there are more than 7 billion barrels of recoverable oil within the coastal plain. Under federal law, the state is entitled to 50% of the royalties paid under the leases. Even if only half of the recoverable oil could be produced, Alaska would be entitled to nearly $25 billion in royalty revenue. This is in addition to the millions owed to the state for its share of the lease rental fees and bonus payments made.