2001 Sonatrach, Enelpower and Wintershall sign a protocol agreement to set up a feasibility study company for the Galsi pipeline.
2002 Edison and Eos Energia (later Hera Group) join the agreement.
29/01/2003 Galsi S.p.A. is formed in Milan to develop the feasibility studies for a new natural gas pipeline from Algeria to Italy. The same year the Region of Sardinia joins the consortium through its subsidiaries Sfirs and Progemisa..
2003-2006 During this period the technical, economic/financial and legal feasibility studies of the project are developed including preliminary environmental impact studies and geomorphological surveys of the sea bed.
2006 In December Galsi shareholders decide to extend the company's scope to the development stage and increase the share capital by 30 million euro.
2007 Front end engineering design (FEED) and detailed marine surveys (DMS) begin. Progemisa leaves the consortium and sells its stake to Sfirs, which remains the only regional development company involved in the project.
07/11/2007 Snam Rete Gas and Galsi sign a memorandum of understanding (MOU) for the realisation of the Italian section of the pipeline. Under the terms of the agreement Snam Rete Gas will build and operate the national stretch of the pipeline.
  Accordo Galsi-Snam Rete Gas

from left
CHAKIB KHELIL, MOHAMED YOUSFI, CARLO MALACARNE, ROBERTO POTÌ, PIER LUIGI BERSANI

14/11/2007 The prime ministers of Italy and Algeria sign a bilateral agreement in Alghero to ratify and define undertakings by their respective governments for the realisation of the Galsi Pipeline.
19/02/2008 Wintershall leaves the consortium and sells its stake to the other shareholders.
31/07/2008 Galsi opens the authorisation procedure by presenting application to the competent Ministries for authorisation to build and operate the pipeline.
30/09/2008 Galsi and Snam Rete Gas sign the final agreement that replaces the MOU and sets out the conditions for, the construction of the Italian section of the new pipeline importing gas from Algeria to Italy, via Sardinia.
2009 The Front End Engineering Design for the whole infrastructure is completed and several supplementary environmental surveys are carried on.