Clough said the $64 million work order is for advance mobilisation and early works. The initial scope of work includes the construction of camps, and select road and bridge upgrades.
The Clough Curtain JV, a 65:35 JV between Clough and Curtain Bros Papua New Guinea, secured a contract for early works on the project in June.
Under the contract, the JV will carry out work orders as budget and scope are agreed.
The scope of work includes the construction of roads, bridges, wharf, laydown and camp areas, and other infrastructure, to enable full scale-construction to start in early 2010.
The ExxonMobil-led PNG LNG project aims to build a two-train 6.3 million tonnes per annum liquefaction plant near Port Moresby, with gas sourced from various Oil Search fields in PNG.
The PNG LNG project is owned by ExxonMobil at 41.6%, Oil Search 34.1%, Santos 17.7% and Nippon Oil 5.4%, while landowner interests hold the remaining 1.2%.
Project operator and 41.6% stakeholder Exxon subsidiary Esso Highlands is overseeing the project's front-end engineering and design phase, and the final investment decision is expected by late 2009.
