AAA

Navy Yard Philadelphia

Disciplines:

This project was the rehabilitation of a 100+ year old pier. It was designed for the USS John F. Kennedy to berth on the west side of the pier and up to six other ships to berth on the east side (2 berthed and 4 nested). If the USS John F. Kennedy moves away, another six ships can be berthed on the west side of the pier.

Bath Engineering Corporation provided mechanical and electrical engineering services a part of a design/build team. Mechanical demolition included a 10-inch insulated water line with valves, thrust blocks, insulation and capping located on the pier perimeter surface. Other mechanical demolition included piping along Wharf 4A and 4B waterfront edge and fire pumps. Fire protection was provided with four snorkel connections for pumper trucks using river water.

Electrical demolition included existing 13.8KV underground primary wiring and conduit and 480V secondary wiring and conduit. Heat trace equipment, lighting poles, fixtures, wiring, and connections were also removed.

Salvage for government:

  • 4 - 15 kV pad-mounted switches
  • 6 – 4000A 480V connection boxes
  • 3750 kVA unit substation
  • 4000 amp switchboard
  • 6 - Lighting poles and lighting fixtures

Salvage for reinstallation:

  • 1500 kVA unit substation
  • 2000 amp switchboard
  • Switch racks and 400 amp disconnect switches

Electrical equipment was designed to operate in a corrosive high humidity environment. Two new 13.2kV, 3-phase, 3 wire service (providing redundancy) were extended onto the pier. The service is provided in four 5-inch conduits (three 1/c #350KCM, 15 kV cable) installed in the pier concrete topping to a new manholes located on the pier and connected to two new 15 kV, 600 amp, S&C PMH 6 pad mounted switches.

On the east side of the pier, a new 1000 kVA (delta-delta) unit substation with a 1200 amp switchboard was installed to serve five 400 amp, 480V, 3 phase disconnect switches mounted on a switch rack at the unit substation and six 400 amp, 480V, 3 phase disconnect switches at hard points.

On the west side of the pier the salvaged 1500 kVA (delta-delta) unit substation with a 2000 amp switchboard was reused to serve five 400 amp, 480V, 3 phase disconnect switches mounted on a switch rack at the unit substation and three 400 amp, 480V, 3 phase disconnect switches at hard point.

The waterfront lighting system was shielded so as not to interfere with navigation on the adjacent waterways and utilized 1000 watt high pressure sodium, UL listed for marine grade service, bull horn mounted in clusters on 28-foot aluminum poles at nine locations. Illumination criteria for the wharf was 5 foot-candles with a minimum level of .5 foot-candles.