The construction program would include a main base for the US Navy at Londonderry for destroyers, submarines and repairs, Lough Erne for Catalina Flying Boats and Rosneath in Ayrshire, for destroyers, submarines and repairs. Later that same month 350 American personnel arrived to begin the work, they were initially billeted in Ebrington Barracks (HMS Ferret) but later as more arrived they move out to newly constructed camps at Clooney, Springtown, Belmont, Creevagh and Lisahally. The construction that occurred was on a huge scale, Lisahally had a 700-metre jetty built which was connected to the shore by three piers complete with a narrow-gauge railway. A mixed fuel tank depot capable of holding 100,000 barrels was completed along with an ammunition depot.