by EUPEC PipeCoatings S.A. For the concrete weight coating, new coating plants were constructed in Mukran (Germany) and Kotka (Finland). Rolls-Royce plc supplied eight aeroderivative gas turbines driving centrifugal compressors for front-end gas boosting at the Vyborg (Portovaya) gas compressor station. Dresser-Rand Group supplied DATUM compressors. Siirtec Nigi SPA provided a gas treatment unit for the Portovaya station. For the construction period, Nord Stream AG created a logistic center in Gotland. Other interim stockyards are located in Mukran, Kotka, Hanko (Finland), and Karlskrona (Sweden). Project companies Nord Stream 1 is operated by the special-purpose company Nord Stream AG, incorporated in Zug, Switzerland, in November 2005. Shareholders of the company are the Russian gas company Gazprom (51% of shares), the German companies Wintershall Dea and PEG Infrastruktur AG (E.ON) (both 15.5%), the Dutch gas company Gasunie (9%), and the French gas company Engie (9%). The chairman of the shareholders' committee is German ex-chancellor Gerhard Schröder. Transportation contracts In October 2005, Gazprom signed a contract with German gas company Wingas—a then joint venture of Gazprom and Wintershall (a subsidiary of BASF)—to supply of natural gas per year for 25 years. In June 2006, Gazprom and Danish Ørsted A/S (then named DONG Energy) signed a twenty-year contract for the delivery of Russian gas per year to Denmark. Additionally, under a separate fifteen-year agreement, Ørsted would supply natural gas per year to the Gazprom subsidiary, Gazprom Marketing and Trading, in the United Kingdom. In October 2009, the companies signed a contract to double the delivery to Denmark. In August 2006, Gazprom and E.ON Ruhrgas signed an agreement to extend current contracts on natural gas supplies and signed a new contract for an additional per year through the Nord Stream pipeline. In December 2006, Gazprom and Gaz de France (now GDF Suez) agreed to an additional gas supply through Nord Stream. Controversies The pipeline projects were criticized by some countries, geopolitical analysts, and environmental organizations (such as the World Wide Fund for Nature). Political aspects Opponents have seen the pipeline as a move by Russia to bypass traditional transit countries (currently Ukraine, Slovakia, Czech Republic, Belarus, and Poland). Some transit countries are concerned that a long-term plan of the Kremlin is to attempt to exert political influence on them by threatening their gas supply without affecting supplies to Western Europe. The fears are strengthened by the fact that Russia has refused to ratify the Energy