WASHINGTON (AP/WAVY) — A government report says the cost to dismantle a decommissioned nuclear-powered aircraft carrier sitting in the Newport News shipyard may exceed $1 billion.

A report this week from the Government Accountability Office comes as the Navy decided what to do with the former USS Enterprise, the Navy’s first nuclear-powered aircraft carrier.

Read the full report here.

Two plans are under consideration: One would dismantle the ship at Puget Sound Naval Shipyard in Bremerton, Washington, while the other would leave the work to a variety of commercial companies at locations to be determined.

Related: Change of plans for recycling of ex-USS Enterprise

The GAO said cost estimates are rising, and recommends the Navy obtain an independent cost estimate before making a final decision on disposition.