Keller North America

Owner:

United States Navy

General Contractor:

Magann Construction

Scope Of Work

Situated in the tidally influenced Elizabeth River, Norfolk Naval Shipyard in Portsmouth, VA, is the oldest and largest shipyard in the United States. No longer used for shipbuilding, the facility nowadays specializes in the repair, overhaul and modernization of ships and submarines.

Dry Dock #8, which is 1,100 feet long by 150 feet wide and extends to a depth of 55 feet below mean river level, is capable of supporting all classes of naval shipping up to and including Nimitz-class aircraft carriers. Rehabilitation of the dock included the removal and replacement of three feet of deteriorated concrete on the walls and floor of the structure. Water levels were required to be maintained three feet below the base concrete slab to reduce buoyancy, maintain the dock’s structural integrity, and control ground water infiltration through the existing concrete during the rehabilitation work.