P-371, Utility Improvements for Nuclear Platforms at Portsmouth Naval Shipyard, Kittery, Maine.

The work includes the construction of comprehensive utility backbone which includes an electrical substation on the pier between Berths 1 and 2 and provides integrated shore power to Dry Dock 1. Creating this substation will meet recently adopted standby power requirements for nuclear-powered submarines. It also integrates primary and standby power for the Dry Dock 1 Nuclear Load House and the Defueling Complex, and integrates Power Integration Distribution Centers (PIDC) currently being constructed by Naval Sea Systems Command to meet standby power requirements. PIDCs allow the nuclear-powered submarines to rapidly transfer loads between commercial and backup power sources as needed during test evolutions and outages with low risks to equipment and personnel.

Project provides improvements to steam, compressed air and water distribution capabilities to Berths 1 and 2. This measure is required to ensure Berths 1 and 2 are complete and useable by meeting capacity requirements for all current submarine platforms. Repairs electrical underground infrastructure along Berth 11 to include manholes, duct banks, ungrounded and grounded AC shore power boxes, and13.2 kV feeders. Due to subsurface instability issues and to improve system access, a utility tunnel will be created, housing electrical and mechanical distribution systems along the berth. Project provides 480 VAC industrial services supporting Dry Dock 1 and Berth 11.