Portsmouth Naval Shipyard Structural Repair

under planning

Cianbro Corp. has begun carrying out a structural repair project at Portsmouth Naval Shipyard in Kittery. The project entails repair or modernization of 1,263 ft of pile-supported open-wharf structures, originally constructed in 1943, with the intent of restoring the load-carrying capacity of the portal crane-rail system along the waterfront. The work includes removal and disposal of existing timber-fender system; dredging; providing steel sheet-pile and rock-socketed king piles with concrete shutter-panel bulkheads and rock-anchored tie-back system; extending storm-drainage discharge pipes through the bulkhead; and providing driven-steel H-Piles (support piles) through existing wharf deck to strengthen existing crane rail beams. The project is valued at $28.8 million.