The contract is for a tieback to the Norsk Hydro operated Oseberg field centre via two 10-in ID carbon steel production flowlines and an integrated service and control umbilical. The basic workscope includes engineering, procurement, fabrication, installation, and pre-commissioning of the two 10-in pipelines, totalling 18km in length, procurement and installation of an integrated service umbilical and one flexible riser, and all subsea installation and construction work including trenching and rock dumping of the flow lines and the umbilical system. The work will be performed during 2006/2007 from Subsea 7's Stavanger office. The contract award includes two significant options: (1) the G-Sentral development, which is a new structure approximately 8km South of Oseberg Delta, with another four-slot subsea station and two 10-in flowlines and one umbilical; and (2) the Tune Phase 2 tie-back, which is an extension to the Tune Phase 1 project completed by Subsea 7 in 2004 and which includes a 3.2-km, 8-in flexible flowline and a service umbilical of similar length.