The U.S. Navy is planning a Design-Bid-Build project for the overhaul of Dry Dock 2 Caisson at Portsmouth Naval Shipyard in Kittery, Maine. The work includes a required certification overhaul, caisson seat extension, and vertical extension to ensure continuous flood protection between Berths 5 and 6. Portions of the work must be performed with the caisson out of the water. No specific budget amount or non-bid timelines are mentioned in the description. The location for performance is Portsmouth Naval Shipyard in Kittery, Maine.