In March 2010, Bilfinger Berger announced that the estimated completion date would be in 2014.

2010年3月，比尔芬格·伯杰宣布预计完工日期为2014年。

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It follows a report, which said there were major problems with contractor Bilfinger Berger over the project.

BBC: Constitution Street

Richard Jeffrey, chief executive of Tie, is under political pressure to find a way of ending a dispute with the construction firm, Bilfinger Berger.

BBC: Edinburgh tram boss Jeffrey calls for political courage