Naval Base Emirau construction activities were taken in hand by the US Navy Seabees of the 18th Construction Regiment, which consisted of the 27th, 61st, and 63rd Construction Battalions and the 17th Special Battalion, which arrived between 25 and 30 March, and the 77th Construction Battalion which arrived on 14 April. The 27th built a PT boat base, an LCT floating drydock and slipway, and roads. The 61st constructed housing, ammunition storage facilities, a runway, and some of the buildings at the PT boat base. It also handled sawmill operations. The 63rd assisted at the sawmill and worked on the roads, camps, harbor facilities, warehouses, magazines and avgas dumps. The 77th built taxiways, hardstands, aviation workshops and the avgas tank farm. The 88th worked on runways, roads, radar stations and a causeway at the eastern end of the island.
