awarded to BSC, a consortium of Bilfinger Berger, Siemens and Spanish tram builder Construcciones y Auxiliar de Ferrocarriles (CAF). The tramway uses a mix of street running and segregated off-road track, with conventional tram stop platforms. Stops are fitted with shelters, ticket machines, lighting and CCTV. The network is operated from a depot in Gogar, close to the A8 roundabout, immediately west of Edinburgh Gateway tram stop. The route of the line required the construction of bridges to cross railway lines at Edinburgh Park and Stenhouse, and a tunnel under the A8 near the Gogar roundabout. A bridge at Balgreen was widened. Works to build a tram interchange at Haymarket station involved the demolition of a Category C(S) listed building, the former Caledonian Alehouse on Haymarket Terrace. Some on-street track was laid in a special foundation with cobbled road surfacing designed to be sympathetic with the style of Edinburgh streets but was removed in many places due to objections from cyclists. The trams are powered by overhead cables attached to purpose-built poles or mounted on the sides of buildings. Nine electrical sub-stations were planned for the line to Newhaven, both underground and above-ground but only five were built after the line was truncated at York Place. Revisions and delays In 2008 and 2009, the project met with delays to work on tramway infrastructure. Phase 1b of the project was cancelled because of a funding shortfall in April 2009. Contractual disputes delayed track-laying in the city centre. In December 2009, media reported that the project budget was running over £545 million, and the system was unlikely to come into operation until February 2012 or later. The operating contract with Transdev was cancelled in December 2009 to reduce costs and it was announced that the trams would be operated by Edinburgh Trams Limited, a subsidiary of Transport for Edinburgh. In March 2010, Bilfinger Berger announced that the estimated completion date would be in 2014. Contractual disputes In February 2009, work on the Princes Street section stopped due to contractual disagreements between TIE and BSC after the latter submitted a request for an additional £80 million of funding. Edinburgh Council believed the contractors' claims were unjustified as they had agreed to fixed-price contracts. After negotiations, BSC agreed to commence construction in March 2009 within the original budget, although disagreements remained. Work restarted and line construction went ahead. In August 2009, TIE began legal