In 1988, the hull of "Theodore Roosevelt" was drydocked at PSNS for removal and disposal of the reactor compartment. An environmental impact study was approved in 1984 for the disposal of de-fueled submarine reactor compartments via permanent storage at the federal government reservation at Hanford, Washington. The reactor compartment was separated from the Hull, placed on a barge in the drydock, and prepared for waterborne shipment to Hanford. The hull was re-joined at the aft bulkhead of the operations compartment, and the forward bulkhead of Auxiliary Machinery Space-2. Both hull and barge were undocked, with the hull returning to afloat storage and the reactor compartment transported to Hanford. The Hanford Burial Trench 94 numbering system indicates that the SSBN-600 RC was the seventh placed in that facility on 1 November 1989.